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Showing posts with label ventricular fibrillation. Show all posts
Showing posts with label ventricular fibrillation. Show all posts

Saturday, August 20, 2011

Answer on Taser danger depends on who's asking

August 19, 2011
Frederik Joelving, Reuters

NEW YORK (Reuters Health) - A new study adds a cynical note to the highly charged debate over Tasers, the American-made stun gun that has made its way quickly into law enforcement across the globe.

As it turns out, people looking to settle arguments about the weapon's safety may not get much help from scientists.

That's because the answer they get from published studies seems to depend on who paid for the research, according to a report in the American Heart Journal.

Looking at 50 human or animal studies on Taser safety, researchers found that 23 of them had been funded by the manufacturer, Taser International, Inc, or done by scientists with financial ties to the company.

Twenty-two of those studies, or 96 percent, concluded the stun guns were safe or at least unlikely to be harmful. By contrast, only about half of the research not linked to Taser International reached that conclusion.

"When you read articles that are very favorable to the device, invariably you will see that one of authors is affiliated with the company making Tasers or sitting on the board," said Dr. Byron K. Lee, who worked on the new study.

"I'm not necessarily saying the research is done dishonestly and they lied and twisted their conclusions, it could very well be they designed their research to give favorable results," added Lee, a cardiologist at the University of California, San Francisco.

According to the Scottsdale, Arizona-based company, its weapon has conquered the market rapidly, and is now used by law enforcement agencies in 107 countries.

With a pull of the trigger, two darts fly out of the gun and lodge in the skin or clothes of the target. The darts set up a high-voltage electric circuit that causes both sensory nerves and motor nerves to go haywire. The result is excruciating pain and violent muscle spasms that immobilize even the feistiest suspect.

NOT SO HARMLESS?

But critics say the powerful jolts, which in rare cases have caused broken bones, could also hijack the heart, causing it to enter a deadly flutter called ventricular fibrillation.

They worry particularly about the cases in which police have used the Taser on children and the elderly, as well as mentally ill people and drug addicts, who may be more vulnerable.

To dispel those fears, scientists have conducted scores of experiments, including an outlandish Taser-funded study published last year, in which sheep were doped up on methamphetamine and then shocked with a Taser X26 gun.

But the studies can't seem to agree.

"Both sides have research to back their claims that the Taser is safe or unsafe," Lee told Reuters Health.

If you Taser very close to the heart, he said, you might trigger a fatal heart rhythm in some animals. But if you aim further away, or use different animals, you might not.

Of course, Lee added, it is also possible that independent scientists might be biased toward finding harm.

"It is much more interesting to say that there is something wrong here, that there are harms," he explained.

When asked if that could have happened in his own study, he acknowledged that the researchers who rated the 50 articles knew where the funding for each had come from. Still, he said he felt their assessments would hold up to scrutiny.

ACCUSATIONS OF BIAS

Steve Tuttle, vice president of communications for Taser International, told Reuters Health that there was no bias in Taser-funded studies.

In an email, Tuttle argued that in most cases, there are three degrees of separation between the scientists doing Taser-backed research and the company.

"The doctors are only paid their normal salary for the research and receive no extra compensation and no moneys from TASER," he said.

"It is worth noting that Dr. Lee has been a paid expert in litigation against TASER and this fact is not mentioned in the conflict of interest section of this report," Tuttle added.

While acknowledging this, Lee countered that it was more than a year ago and that the journal did not require disclosures that far back.

He also said that after he started doing Taser research in 2008, he had removed himself from the case and paid back all the moneys he'd received.

Debates about conflicts of interest and corporate funding biasing research are nothing new, and happen throughout the medical community.

For instance, a study from 1998 in the Journal of the American Medical Association found that scientists from the tobacco industry rated secondhand smoking harmless more than 90 percent of the time. Only 13 percent of researchers without industry ties came to that conclusion, however.

"When you come to a research question with predetermined bias because of funding that you get, you can very much design a study to further the company's interests," Lee said. "I think that is a very real danger of biomedical research."

His fix?

"The first step is to be aware of it, and then look really critically at the article's methods," Lee said.

Thursday, September 09, 2010

Are Electric Stun Guns Always 'Non-Lethal' Weapons?

Amelia Templeton September 9, 2010 Portland, OR
OPB News

Electric stun guns are used by law enforcement agencies across the country. People generally call the guns by their most common brand name, Taser.

Most research suggests that the 5-second pulse of electric shock the guns deliver doesn’t cause any long-term harm to a healthy person. But the company acknowledges that Tasers haven’t been scientifically tested on elderly or sick people.

Reporter Amelia Templeton takes a closer look at the recent death of Phyllis Owens, from Sandy.

Sergeant Adam Phillips runs the Taser training program for the Clackamas County Sheriffs. Phillips says that one of the main benefits of the Taser is that’s its safer than other weapons.

Phillips has voluntarily allowed himself to be shocked with a Taser three times. He says is painful. Then it’s over.

Adam Phillips: “I wouldn’t let myself get tasered if I was concerned.”

But two recent incidents in Oregon raise questions about whether the Taser could be linked to more serious health risks.

Steven Avila, a 16-year-old from Salem, was shocked with a Taser by state police in June. He spent several days in the hospital in critical condition.

Little information is available about the incident because Avila is a minor.

In July, a Clackamas County deputy fired a Taser at an 87-year-old woman, Phyllis Owens. She collapsed immediately and died in a hospital about an hour later.

Larry Lewman: “The critical thing is really the timing. And she went down, boom. And that’s how you relate this.”

That’s deputy state medical examiner Dr. Larry Lewman. He performed an autopsy on Owens. He says she relied completely on a pacemaker to tell her heart when to beat, and how fast.

Lewman says the Taser wouldn’t have killed a healthy person. So he listed heart disease as the cause of Owens’s death.

Larry Lewman: “I think it happened at this time and at this place because of the application of the stun gun, which probably interfered with the electrical device.”

Clackamas County Sheriffs classify the Taser as a non-lethal weapon. A spokesman for the sheriffs’ office says the deputy’s use of force was justified. That’s because he believed Ms. Owens was reaching for a pistol. The weapon was actually a pellet gun.

Dr. Eric Putz is the cardiologist who gave Ms. Owens her pacemaker. He has two theories about how the Taser could have interacted with her pacemaker.

Putz says a pacemaker has a wire that acts like an antenna. The sensitive antenna monitors the electrical signal from the heart to make sure it’s beating. Outside electrical signals can trick the pacemaker’s antenna.

Eric Putz: “If it picks up the electrical signal, it believes that that electrical signal is a heartbeat and it will not pace. When you suddenly and abruptly go without a heart beat, you can have life threatening arrhythmias related to that.”

Putz has a second idea about what could have happened in Owens’ case. The stun gun dart hit Owens in the shoulder, not far from where her pacemaker was implanted. Putz says its possible the wires allowed the electricity to travel to her heart, and cause it to beat erratically.

Eric Putz: “That electrical energy, or that, that pathway so to speak, could include that wire that goes from the chest wall down into the heart and lead to a rhythm called ventricular fibrillation.”

Dr. Dhanunjaya Lakkireddy says he doesn’t think either of those scenarios is very likely. In a recent study partially funded by the Taser company, Lakkireddy implanted pacemakers in about a dozen pigs with healthy hearts. Then he shocked the pigs with Tasers. He says the pacemakers in the study did sometimes pick up the current as interference and stop pacing briefly.

The Taser company did not respond to numerous requests for comment.

(REALLY?? Read how "the Taser company" responded to a National Post reporter in May 2008 - Jonathan Kay on the best corporate media department in the world - where they refer to Dr. Lakkireddy's research but omit to mention that the study was partially funded by they themselves.)

On its website, the company cites Dr. Lakkireddy’s study, and says that Tasers are safe even for people with pacemakers.

But the company also warns law enforcement officers that Tasers have not been scientifically tested for use on pregnant, infirm, elderly people, or children. And it says that use of the stun gun on those people could increase the risk of death.

Adam Phillips: “None of them are precluded at any time from our policy or in the training that Taser provides. That’s Sergeant Phillips, with the Clackamas County Sheriffs.

Adam Phillips: “Elderly and young are included in that. They never say you cannot use it against this group under these circumstances.”

Sergeant Phillips says Owens’s death hasn’t led to any policy changes. He says any police use of force can be problematic for people with underlying health issues. But sometimes use of force is unavoidable.

Adam Phillips: “ I don’t know that there is an answer, with any of our tools, with people who have underlying health issues. Neither you or I could tell. A doctor can’t tell. So how would we expect a police officer to?”

The Clackamas County major crimes unit has been investigating Owens’ death. The district attorneys office says the investigation should conclude this week.

Thursday, December 03, 2009

EDITORIAL: Taser trouble - stun guns are taking a toll

Salt Lake Tribune Editorial

The autopsy results are in. But, despite the definitive findings the verdict is still out on the weapon that killed Brian Cardall.

Cardall, a promising research scientist and Utah native, died from "ventricular fibrillation following conducted energy weapon deployment ... ." In other words, death by Taser.

Here's what happened. In June, Cardall, 32, was returning to Arizona after visiting Utah when he experienced a manic episode brought on by his bipolar disorder. He pulled his car to the side of the road, got out, removed his clothes, and began flagging down vehicles on State Road 59 outside Hurricane.

Cardall's wife gave him medication, called the police, informed the dispatcher of her husband's psychotic condition and the fact that it would take a while for the medicine to take effect. But Cardall ran out of time.

Just 42 seconds after Hurricane Chief of Police Lynn Excell and officer Ken Thompson arrived at the scene, Thompson claims, a confused Cardall, who refused to get on the ground as ordered, stepped toward the officers. Thompson fired his Taser, striking a naked and unarmed Cardall in the chest over the heart. When the Flagstaff resident attempted to rise, Thompson gave him a second jolt. Within minutes, Cardall was dead, one of about 350 Americans to die after a Taser deployment since 2001.

Had the incident occurred 20 years ago, before Tasers came on the market, Cardall, who weighed just 156 pounds, would have been physically taken to the ground and handcuffed. He may have suffered bumps and bruises, cuts and scrapes. The police officers would have risked same. But nobody would have died.

Cardall's family says the officer used excessive force, a claim rejected by investigators, who determined that Thompson adhered to both his department's use-of-force policy and Utah law. No charges were filed. And, because the policy and not the officer was at fault, none was deserved.

Thompson certainly didn't mean to kill Cardall. In fact, along with officers in 14,200 police, military and corrections agencies in 44 countries, Thompson had been taught that the Taser can prevent physical altercations that cause injury, and negate the need for deadly force. That it saves lives. As a result, Tasers have become the "nonlethal" weapon of choice in law enforcement circles. But that could change.

In the months since Cardall's death, Taser International, which manufactures the stun guns, lost a wrongful-death lawsuit, a first. A California jury determined that the company failed to adequately educate police about the risk of cardiac arrest from using the weapon.

Plus, the Arizona-based company recanted its long-standing advice to aim at center body mass, and advised police not to shoot suspects in the chest.

And, the American Medical Association determined that Tasers can do more harm than good. In a report issued the same month Cardall died, the AMA said "Tasers are used too frequently ... and may contribute to the death of suspects directly or indirectly." The group said more research is needed to determine if Tasers are safe for use on suspects in altered states, like Cardall.

The next move belongs to police departments, which should change their policies regarding Taser use. Tasers should be used sparingly, a weapon of next-to-last resort, until all of the evidence is in.

Friday, November 20, 2009

Autopsy links Taser to Cardall's death - Coroner cites being stunned near the heart as a key factor

November 19, 2009
Melinda Rogers, The Salt Lake Tribune

A Taser that twice shocked Brian Cardall contributed to or caused heart irregularities in the 32-year-old man that led to his death on the side of a southern Utah highway in June, the Utah Medical Examiner's Office has ruled.

Deputy Chief Medical Examiner Erik Christensen cited "ventricular fibrillation following conducted energy weapon deployment during a manic episode with psychotic features" as Cardall's cause of death.

The Salt Lake Tribune obtained a copy of the autopsy report Thursday from the Cardalls' attorney. The family chose to release it after Washington County Attorney Brock Belnap said he will not prosecute the officer who deployed a Taser on Cardall.

Belnap said Hurricane police Officer Ken Thompson legally used a Taser on Cardall as the man suffered a bipolar manic episode June 9.

The Cardall family disagrees with Belnap's decision, said Karra Porter, who is advising the Cardalls on their legal options.

Christensen's report states that prongs from a Taser a Hurricane police officer deployed struck Cardall over his heart. While Christensen acknowledged other factors could have contributed to Cardall's death, he pointed out factors that indicate a Taser electrocuted a naked, unarmed Cardall.

"While it is generally acknowledged that [Taser] use is safe and represents an extremely low risk due to the electrical activity of the weapon, the circumstances in this case represent a combination of the factors that are believed to increase the risk of a potential electrical death," Christensen's report reads.

"These include the placement of the barbs over the cardiac axis, the penetration of the barbs deeply into a thin chest wall directly over the heart, absence of intervening clothing and more than one cycle of electrical stimulation.

"Additionally, the initial cardiac rhythm of ventricular fibrillation is consistent with findings seen in cases of electrocution."

Christensen's conclusion that the X-26 Taser, made by Scottsdale, Ariz.-based Taser International, played a significant role in Cardall's death is bold.

While Taser International has claimed its products are not risk free, it has publicly stated its products do not cause cardiac arrest. It has filed numerous lawsuits against medical examiners who have cited Tasers as a cause of death.

Christensen noted that because Cardall, a graduate student at Northern Arizona University, was in a manic state, he was at risk for a heart attack before the Taser struck him.

Christensen said Cardall did not die from excited delirium, a syndrome often cited as a cause of death when someone is agitated or delirious and then dies after forcefully being taken into custody.

Thompson twice deployed a Taser on Cardall on the side of State Road 59 near Hurricane after Anna Cardall called 911 to report her husband was behaving erratically.

Thompson, one of multiple officers on the scene, waited 42 seconds after arriving before he deployed a Taser on a manic and confused Cardall, according to 911 recordings.

The 156-pound Cardall is heard screaming for about five seconds after Thompson first deploys a Taser on him. After a two-second pause, Thompson deploys the Taser on Cardall again. He says in the recordings Cardall had tried to get up.

Mental health history

Christensen's report details Cardall's struggle with bipolar disorder, which surfaced with depression in high school. Doctors diagnosed him as bipolar in 2005 after a manic episode that required brief hospitalization.

Cardall suffered manic episodes in 2006 and 2007, which he believed was due to a lack of sleep and stress, the report states. Cardall had been on and off medication for his disorder; he had scaled back medication in January.

Christensen wrote that Seroquel, the medication Cardall took for bipolar disorder, likely didn't contribute to his reaction after being shocked. He detected trace amounts of marijuana in Cardall's system, but Cardall tested negative for other illicit drugs.

Cardall's family told Christensen that Cardall occasionally used marijuana, according to the report.

Taser International had not yet seen Christensen's report, company spokesman Steve Tuttle said.

"We have not been provided a copy of the autopsy for our medical advisory board to review the details of this tragic incident. Our hearts continue to go out to the Cardall family during this difficult time," Tuttle told The Tribune .

Peter Stirba, a Salt Lake City attorney representing the Hurricane Police Department, said only that Belnap's decision vindicates Thompson and was correct based on evidence.

Possible lawsuit?

The Cardall family is disappointed Belnap didn't hand off the case to another county, said Porter, of Salt Lake City-based law firm Christensen and Jensen.

"It would be awkward for a county attorney in a relatively rural area to prosecute people he works with every day," she said.

Utah law, however, says county attorneys handle use of force investigations.

Any lawsuit filed by the Cardall family will face fierce contention from Taser International, which has only lost one case in the 97 lawsuits filed against the company since its inception in 1993, Tuttle said.

But the tide is beginning to turn, said California attorney Peter Williamson, who, along with co-counsel John Burton, recently won the first suit against Taser International.

A federal judge in the U.S. District Court for Northern California ordered Taser to pay $1.4 million in attorney fees to Williamson and Burton, who represented the family of Robert Heston, who was killed in 2005 after he was shocked multiple times while high on methamphetamine.

The 40-year-old man's father had called police for help to restrain his combative son. Five officers shocked Heston 25 times.

Judge James Ware ordered the company to pay attorney fees following a decision by a jury to award Heston's family $153,000 in damages. The jury found that Taser International didn't properly educate the police who stunned Heston about cardiac risks associated with the weapon.

In an explanation of why he awarded attorneys fees in the case, Ware wrote: "The notoriety of ... the first-of-its-kind verdict, in some circumstances, has prompted a number of Taser customers and prospective customers to consider the risk of repeated and prolonged Taser electric charges on individuals in an excited or delirious state."

Williamson said the company considers the verdict in the Heston case "a fluke."

"The only way we can get Taser to change its warnings and training is to sue them enough times that they finally capitulate," said Williamson, who believes the Cardalls have a strong case against Taser.

Changing targets

In an Oct. 12 bulletin, Taser told police not to aim a Taser at a suspect's chest. Shooting the device lower will incapacitate a suspect more effectively, it said. The bulletin notes police still can shoot at a chest lacking a better option.

Taser critics say the bulletin is the company's first admission that the weapons pose a cardiac risk --- an allegation the company denies. The company based its decision on best practices research and will help police avoid lawsuits from those who claim the devices cause injuries and other health problems, Taser's Rick Guilbault said in the bulletin.

Taser's bulletin states the risk of cardiac arrest when a Taser is deployed on a suspect is low, but notes reactions can't be predicted, particularly when other underlying medical conditions or drugs are added to the equation.

"We have not stated that Taser causes [cardiac] events in this bulletin, only that the refined target zones avoid any potential controversy on this topic," Tuttle said.

He added changes "specifically had nothing to do with the Cardall incident."

But Williamson is skeptical.

"It's interesting to note within the last 30 days, Taser has issued its [new training bulletin]," Williamson said, adding that in addition to the Cardall case, Taser is dealing with another pending California trial where a man died after being shocked in 2004.

Taser as a cause of death

Medical examiners nationwide have been sued for citing Tasers as a cause of death.

Last year, an Ohio judge ordered a medical examiner to remove Taser's name from three autopsies. The Summit County Medical Examiner's Office "offered no medical, scientific or electrical evidence to justify finding the stun gun was a factor in the deaths of two men in 2005 and another in 2006," The Arizona Republic reported in May 2008. Taser and the City of Akron had sued the medical examiner, claiming the examiners didn't have the proper education to decide whether Tasers contributed to the death.

The county's chief medical examiner contested the ruling, according to The Arizona Republic.

Taser also sued Indiana coroner Roland Kohr, who found the weapon contributed to a man's death in 2004.

Taser International dismisses what it calls misconceptions that the company targets medical examiners who make unflattering reports.

"This is simply not true," Tuttle said. "In the two instances that Taser has brought legal action regarding medical examiners, the lawsuits were to correct scientifically baseless opinions that resulted in very negative consequences to numerous entities and people."

Williamson disagrees. He said Taser intimidates medical examiners who find the stun guns lead to death.

"Very few medical examiners will stick their necks out on the line," he said.

Excited delirium theory nixed

Christensen's finding that Cardall did not die of excited delirium in Cardall is noteworthy. Speculation that the controversial syndrome killed Cardall has been widespread among law enforcement since he died. In a letter to the editor The Tribune published in June, University of Minnesota biomedical engineering professor Mark Kroll suggested excited delirium killed Cardall.

Kroll, a member of Taser's scientific and medical advisory board, wrote that: "Excited delirium is a widely accepted entity in forensic pathology and is cited by medical examiners to explain the sudden in-custody deaths of individuals who are combative and in a highly agitated state."

"The fundamentals of an excited delirium death are not that difficult to understand," Kroll wrote. "Our bodies have limits to exertion... If these limits are sufficiently exceeded, we will die."

Christensen's report states that Cardall displayed some symptoms of excited delirium, but he did not show signs of hyperthermia, a condition where the body produces more heat than it can expend. He wasn't involved in a physical struggle and didn't show "feats of superhuman strength," which is common in excited delirium cases.

"His initial cardiac rhythm is also different from the usual rhythm in cases of [excited delirium]," the report states.

Porter said Christensen's findings support the Cardall family's efforts to expose Brian Cardall's mistreatment. The family may file a lawsuit so that "the full truth emerges regarding Brian's death."

"They also want to feel reassured that steps are being taken to prevent other senseless deaths in the future," she said.

Thursday, May 14, 2009

'Stun Gun' Deaths Rarely Caused by Ventricular Fibrillation

May 14, 2009
Forbes

THURSDAY, May 14 (HealthDay News) -- News media periodically report on people dying after being shocked by Tasers, better known as "stun guns."

But instead of immediately dropping to the ground, people often take as long as 13 minutes to collapse, new research shows.

And though the cause of death is often attributed to ventricular defibrillation, an often fatal heart arrhythmia believed to be caused by the electrical stimulation, other types of heart arrhythmias are a more common cause of death.

The research was to be presented Thursday at the Heart Rhythm Society's annual meeting in Boston.

Researchers examined emergency medical services reports, autopsy reports and electrocardiograms (EKGs) of 12 men with a median age of 36 who collapsed within 15 minutes of having a conducted energy weapon (CEW) used on them between 2001 and 2008. Taser is a brand name for a conducted energy weapon.

Initial EKGs, which record heart electrical activity, showed only one man had ventricular fibrillation, while 11 had other types of heart arrhythmias.

Ventricular fibrillation is an uncoordinated, rapid contraction or trembling of the heart's ventricles that causes the blood to stop circulating. Ventricular fibrillation can lead to death within minutes.

Medical records showed the other 11 men had a variety of abnormal heart rhythms, including six with asystole (less then five beats per minutes) and two with severe bradycardia (six to 29 beats per minute).

Nine of those who died were taking illegal drugs, and four had significant cardiomyopathy, or inflammation of the heart.

The man with ventricular fibrillation collapsed immediately after the Taser was discharged to the left chest, consistent with electrically-induced arrhythmia, researchers said.

In the remaining 11 men, the time from the last weapon discharge to collapse ranged from one to 13 minutes.

"In sudden deaths proximate to CEW discharge, collapse is rarely immediate, and VF [ventricular fibrillation] is uncommon," according to a Heart Rhythm Society news release. "While one case was consistent with electrically induced VF, it is not a common causal mechanism of these sudden deaths."

Sunday, May 10, 2009

Postmortem diagnosis of ventricular fibrillation

Excited-delirium is onto something very important: Postmortem diagnosis of ventricular fibrillation

But don't stop there - be sure to go back to the top and read it all at www.excited-delirium.com

The day is coming when the owner of www.excited-delirium.com (and others who have not been paid off by Taser International) will be called to give some truly independent expert witness testimony.

Sunday, January 11, 2009

Researcher says police who use stun guns could save lives with defibrillators

January 11, 2009
The Canadian Press

VANCOUVER, B.C. — If police are going to continue to carry stun guns, they should also have to carry defibrillators, says a retired expert in electromagnetics.

Andrew Podgorski has been fascinated with the devices since they went on sale in the United States decades ago, and has generated a half-metre-thick stack of files and reports on the weapons.

The Taser device is one of the most widely used shock weapons by Canadian police forces.

The conducted energy weapons have come under greater scrutiny across the country following deaths of several people after being shocked by police.

None of those deaths was more controversial than that of Robert Dziekanski, who died on the floor of Vancouver's airport after he was shocked five times. Witness video of Dziekanski's dying moments were broadcast around the world.

Podgorski's study, which was filed with the B.C. public inquiry looking into Dziekanski's death, concluded the stun guns "could induce a fatal fibrillation of the human heart."

The B.C. Crown prosecutor's office announced last month no charges would be laid against the officers involved in the incident.

The inquiry is set to resume Jan. 19.

Podgorski, who worked for Canada's National Research Council until 1995, said he believes the weapons are very dangerous.

And he said if every officer carrying a Taser also had a device to restart the heart, it would save lives.

"If you use Tasers, you have to have a defibrillator," Podgorski said in an interview from his Ottawa home.

He said that in almost all the cases where the heart stops beating, a defibrillator can revive the person.

Podgorski believes the weapon is connected to the deaths of about one in 1,000 people shocked by the devices.

Taser International, based in Phoenix, Ariz., has consistently argued the devices aren't the cause of people dying after police confrontations.

Pete Holran, vice-president of public relations at Taser, said dozens of tests show impulses from the device don't affect the heart.

He added that it wasn't until 1999, well after Podgorski's study, that the weapon was fully developed to incapacitate the body's muscles, making a person incapable of moving.

"Before it was just a pain-compliance device," he said.

RCMP started using Tasers in 2001 and the weapons now are widespread among Canadian police forces.

Podgorski's 1990 report concluded stun guns can affect the heartbeat and present a serious safety hazard.

The study was conducted on pigs with pacemakers. Each pig was killed by a stun-gun shock, then jolted back to life with a defibrillator.

"From the human point of view, this was stunning," Podgorski said. "I mean, the pig was dying and then we revived it."

But Podgorski said that would take more police training and it would be expensive for officers to carry around the life-saving devices.

He said he's sad to hear news stories about people dying after being jolted by Tasers.

"I predicted it. I'm sorry about it."

RCMP Sgt. Tim Shields said police haven't seen any documented evidence that would support Podgorski's theory.

"If someone has something that has been well-researched, then we would definitely like to see it," he said.

"Our priority is saving lives and we only use the Taser in cases where there are direct threats to the public or to the police officer."

Shields said the suggestion that police officers who carry Tasers also carry a defibrillator might not be practical because of the training and cost involved.

"However, if carrying defibrillators was a reality ... we would be all for it, because there are many other incidents where a defibrillator might come in useful to save somebody's life, completely unrelated to the Taser."

Last month, municipal police forces in B.C. agreed to remove and test stun guns acquired before 2006 over concerns they generated higher shocks than manufacturer specifications.

Several other forces across the country, including the RCMP, also announced they would begin a more rigorous testing process for the weapons.

Holran said defibrillators have been proven to save lives.

"What isn't proven is a direct correlation between the use of a Taser device and the need for a defibrillator," he said.

He said the Taser is probably the most tested device weapon a police officer carries, and human studies have shown the heart isn't affected.

"And so if there's no effect on the heart, if it's only affecting the skeletal muscles, then the correlation would be there would be no need for a defibrillator in direct causal relationship with Taser use," Holran said.

Friday, December 05, 2008

New study fuels debate on Taser safety - 9% of stun guns in study gave more powerful jolt

December 5, 2008
Ronald J. Hansen and Robert Anglen, The Arizona Republic

A new study has found that the type of Taser stun gun used most by police officers can fire more electricity than the company says is possible, which the study's authors say raises the risk of cardiac arrest as much as 50 percent in some people.

The study, led by a Montreal biomedical engineer and a U.S. defense contractor at the request of the Canadian Broadcasting Corp., also concluded that even stun guns firing at expected electrical levels carry some risk of inducing a heart attack, depending on the circumstances.

The researchers' analysis contradicts Taser's position that electric shocks from the weapons cannot kill. The study said the results raise questions about quality control in the stun gun's manufacturing and decline in performance over time.

Taser International Inc., based in Scottsdale, called the study flawed. "Regardless of whether or not the anomaly (high-firing guns) is accurate, it has no bearing on safety," Taser Vice President Steve Tuttle said.

The study, which authors say tested more Tasers than any previous independent review, examined 44 stun guns being used today by U.S. law-enforcement agencies. It found that four would not fire at all or fired improperly and that four others produced from 47 to 58 percent more power than the manufacturer specified.

Researchers said the fact that 9 percent of the guns tested abnormally high was significant enough to recommend a freeze in using X26 stun guns made before 2005. They also recommended more electrical tests on Tasers now in use by Canadian and U.S. law enforcement.

Pierre Savard, a biomedical engineer in Montreal who co-authored the report with two Chicago doctors, said they may have understated the risk Tasers pose because there is little available research on the effects of the weapon on humans, especially those who have heart disease. Although Savard said he recognizes the value of less-lethal weapons, he added that he is convinced Tasers can kill in some circumstances.

"Scientists who had evaluated the Taser to start with said, 'Well, there's zero probability of death.' I'm sure that's not the case," Savard said in an interview with The Arizona Republic. "I'm 100 percent certain that cardiac diseases increase the risk of death after receiving Taser shock. I think there's enough scientific evidence for that."

It's still unknown if illegal drugs also change the risk factor, Savard added.

Taser officials acknowledged the possibility of a higher-than-normal initial charge in weapons not first given a "spark test" to ensure they are in proper working condition. They insist this does not affect safety and cautioned Canadian Broadcasting in a memo not to use "engineering minutiae to confuse the (public) and create a false sense of controversy."

The study fuels a long-standing debate within medical and law-enforcement circles about the safety of Taser's stun guns.

The safety issue

The guns are used by more than 12,000 police agencies across the country, including every major law-enforcement agency in the Valley. Many authorities credit the weapon with preventing deaths and injuries to officers and suspects.

But since 2001, there have been more than 380 deaths following police Taser strikes in the United States and 26 in Canada. Medical examiners have ruled that a Taser was a cause, contributing factor or could not be ruled out in more than 30 of those deaths.

Taser has challenged those findings and maintains the stun gun is safe.

Taser executives have said for years that the guns could not produce shocks greater than the manufacturer's specifications and that the stun gun would melt before producing high-level shocks. "The device is calibrated such that it cannot output any more power. It's running at 100 percent," Taser Chief Executive Officer Tom Smith testified in May during a British Columbia government inquiry into Taser safety.

The inquiry was spurred by the 2007 death of a Polish citizen at Vancouver International Airport who stopped breathing within moments of being shocked twice by police.

Law-enforcement agencies that use Tasers typically do not conduct their own testing of the gun's discharge or safety but rely instead on the company's testing.

"We do not recommend (agencies') testing the output," Smith said at the hearing.

Valley police agencies contacted Thursday confirmed that they did not conduct any independent electrical tests on the stun gun before arming officers. Both Phoenix and Chandler police departments issued statements saying they were not aware of the study and will review its validity and reliability.

"We are going to take a look at the study and evaluate it," Chandler Detective David Ramer said. "Anytime something like this comes out, we look at it."

The 44 Tasers used in the recent study were obtained from seven undisclosed U.S. police agencies. Canada's national public-television and -radio broadcaster, the Canadian Broadcasting Corp., paid for the study as part of its ongoing investigation of Taser.

CBC hired National Technical Systems, a California-based firm that tests weapons systems for the U.S. military. It found that four of the X26 guns fired more electrical current at their peak than Taser guidelines show is possible for that model. Three other guns didn't fire at all, and one couldn't sustain its current properly. The rest fired within the guidelines.

The tests were based on Taser's own testing protocol and the electrical-load level recommended by Taser. Each stun gun was tested six times and the results were inconsistent, Savard said, raising manufacturing concerns.

"Since 67 percent of the older devices . . . showed this type of problem, this raises the issues of quality control during manufacturing and component aging," Savard wrote in the report.

In other tests at different load levels, Savard said, all of the four Tasers that showed excessive current fired within normal ranges.

All four of those that fired beyond their expected capacity were sold to two police departments in 2004, making them among the oldest tested. That raised questions about how the guns age and how they were made in the first place, Savard said.

Magne Nerheim, Taser's vice president, challenged the study on significant areas. He said researchers failed to spark-test the gun before testing the power, which created exaggerated results "not representative of actual output." He also said the guns were tested using an incorrect resistance level that does not reflect the effect of Taser shocks on a human.

Resistance, measured in ohms, refers to how any object withstands an electrical charge. The higher the resistance level, the less effect the charge will have. Nerheim said if the resistance level had been increased, the guns would not have recorded such powerful shocks.

Nerheim's challenges, however, differ from a protocol that Taser sent this year to Canadian police officers who were testing Tasers used on a suspect who died after being shocked.

The testing protocol, obtained by the CBC, specified using the lower resistance level, the same one NTS followed for its study.

The protocol Taser sent to police also made no mention of conducting a spark test. A spark test is an initial pull of the trigger. "Inside the device, it takes a higher initial voltage to wake up the component that has become inactive from not being regularly operated," Nerheim said.

But Taser is not consistent in its spark-test recommendations. The company tells police to conduct a test every day on the X26, but the operating manual for the consumer model (X26C), which is modeled after the police version, says a test is needed once every six months.

Nerheim stressed that the study concentrated only on the first pulse of the stun gun, which fires 19 electrical pulses per second, and suggested averaging all the pulses over the span of a second would offer a more relevant safety picture.

In any event, he said the first pulse would not reach a person shot with the device's darts. Nerheim didn't address how an overly high initial pulse would affect someone shocked by direct contact with the gun, one of the methods used by police.

Taser officials did not address findings concerning the age of the guns that fired at abnormally high levels.

Design and manufacturing issues have surfaced before on the stun guns.

"Design flaws and manufacturing-process problems" were key elements in a shareholder lawsuit against Taser in 2005. The lawsuit alleged that faulty quality control and unstable circuit boards led to major returns of Tasers, and a former employee testified that "as much as 70 percent of the M26 and X26 (Taser models) tested in-house by Taser were defective."

Taser settled the lawsuit in 2006 for $21 million, but company officials steadfastly denied the accusations, describing the payout as a business move and a way to avoid expensive litigation.

Effects on the heart

The doctors and engineers hired by the CBC to interpret the results determined the higher electrical current was enough to raise the risk of an irregular heartbeat to as much as 50 percent for those with existing heart troubles.

The risk level depends on various factors, including whether the heart lies between the Taser's barbs and how long the shock lasts. The risk would decline if, for example, the Taser's barbs fell off or didn't fully penetrate the skin.

Savard also concluded that multiple shocks from normally working Tasers posed up to a 5 percent risk of ventricular fibrillation, the abnormal heart rhythm associated with a heart attack.

Savard said he is worries that police are given Tasers that are potentially deadly but are told they are totally safe. He suspects such pronouncements have led to a dangerous "drift" in usage of the weapons.

"If you're told there's zero risk . . . you can start using it just to save time because you're tired of talking with the subject," he said.

Click HERE to read the report.

Wednesday, November 05, 2008

Tased and Confused

November 5, 2008
Written by Laurel Chesky, Good Times

A Watsonville family says a stun gun stopped Steve Butler’s heart, resulting in brain damage. Now they’re suing the manufacturer in what could be the first case of cardiac arrest caused directly by shocks from a Taser gun.

When Steve Butler stumbled onto the bus, the driver was less than thrilled. He didn’t want to deal with a drunk on the bus disturbing his driving, harassing or falling on passengers, perhaps barfing all over the seats and floor. So he called the police and sat tight. Within minutes, a Watsonville Police Department patrol car arrived. According to police reports, at 4:15 p.m. on Oct. 7, 2006, two officers stepped into the bus and found Butler slumped on the back seat.

“Hey, how you doing?” one of the officers asked Butler.

With slurred speech, Butler replied, “Are you here to ride the bus?”

“No,” the officer said.

“Sit down or get the fuck out!” Butler responded. “Sientes aqui!”

Butler jumped up and assumed a fighting stance. His fists were clenched and raised to shoulder level. He planted his leg apart, knees bent, and snarled at the officers. He took two steps toward them. One of the officers withdrew his Taser X26 stun gun from its holster. He told Butler to relax and ordered him to turn around and put his hands on his head.

“If you touch me,” Butler threatened, “I’ll fucking deck you!”

The second officer reached for Butler in an attempt to handcuff him. A scuffle ensued and the first officer shouted, “Taser, Taser, Taser!” and then pulled the trigger. Two probes charged with 50,000 volts of electricity pierced Butler’s chest. The struggle continued and the officers, unsure whether Butler was packing a weapon or not, took no chances. The officer with the Taser gun shocked Butler again and then a third time before he dropped to the bus floor.

When Butler didn’t make it home that night, his mother was frantic. (At 48, Butler lived with his parents.) Very early the next morning, she received a call from Watsonville Community Hospital saying that her son was there and in intensive care. She called David, one of her three sons, who headed straight to the hospital, where he found his brother comatose. Butler’s sister, Laura Plumlee, also went to the hospital.

Family members were not allowed to see him at first. “A nurse came out and said, ‘I can’t tell you anything. All I can tell you is that the police got him off the bus and he collapsed,’” Plumlee says. “I went to pieces, but my brothers were there for me.”

Soon the family was permitted to see him, two at a time. David and Plumlee went in together. They pulled back the bed sheet and looked over Butler’s body. They found two, pea-sized red burns on his chest, directly over his heart. David took pictures of the marks with his cell phone.

“David asked the nurse, ‘Did they tase him?’” Plumlee says. “She said, ‘I can’t lie to you. Yes, they did.’”

After the third Taser shock, Butler’s heart stopped. Police officers on the scene immediately carried him off the bus and called the paramedics. When the EMTs arrived, they used a defibrillator machine to jump-start Butler’s heart. After five attempts, his heart began beating on its own again.

It’s unclear how long Butler’s heart lay still. But one thing is certain: It was long enough to starve his head of oxygen and cause permanent brain damage. According to a Jan. 26, 2007 assessment conducted by a neurologist at Santa Cruz Medical Foundation, Butler suffers from “severe anoxic encephalopathy [brain degeneration due to lack of oxygen] status post cardiac arrest induced by a Taser gun.”

Butler had his share of problems before the Taser incident. He suffers from bipolar disorder, borderline paranoid schizophrenia and alcoholism. Before the brain damage, and when he took his medication, he worked as gardener. Sometimes he worked with the elderly at his mother’s church. When he refused to take his meds, as he occasionally did, he drank excessively and acted erratically.

His police record includes arrests for DUI, resisting arrest and battery to a peace officer. His most serious offense was armed robbery in Tulare, for which he spent six years in prison. (Butler claimed innocence and his brother, David, believes the court convicted the wrong man.) He had been in Tulare to take care of his grandmother after she suffered a stroke.

About a year and a half ago, Butler’s sister Laura Plumlee says, he was off his meds and stole a truck. “He was manic and psychotic, and he saw a truck with a Raiders stickers on it that had the keys in it,” Plumlee says. “He thought the truck was there for him, so took off in it.” Eventually he was caught and arrested, but the charges were dropped on the condition that he get back on his meds and observe a curfew at his parents’ home in Watsonville, Plumlee says.

But for all his drinking and bizarre antics, Butler’s brother, David, and sister say they never saw him act violently, even when he’d been drinking. “I’ve never, ever seen him violent,” Plumlee says. “Once he got upset with one of our brothers and he hit the fence. That’s the only time. He wouldn’t hurt a flea.”

According to police reports about the bus incident, Butler did not brandish a weapon, strike an officer or wage any serious threat to the officers’ safety. His family has a difficult time believing that two police officers couldn’t gain control of an extremely drunk, possibly stoned, 132-pound man without the use of electrical shock.

“They could have subdued him with pepper spray, they could have manhandled him,” says David, who is now Butler’s full-time caregiver and legal conservator. “At first I was blaming the police, but now I blame Taser because they arm these cops with these Taser guns and say they’re safe to use, that they won’t harm anybody. The police are not properly informed about the Tasers, I believe.”

Holding Taser Accountable

Shortly after the third shock with the Taser gun, Butler’s heart went into ventricular fibrillation (VF), a condition in which the heart beats out of sync and is unable to pump blood. Cardiac arrest followed, leading to the brain damage. The Butler family believes that the repeated shocks to the chest from the Taser gun interfered with the electrical signals within the heart that prompt it to beat at a regular rhythm, causing the VF. While the cause may seem obvious, the stun gun’s manufacturer, Taser International, Inc., maintains that its products do not cause VF or cardiac arrest.

Just shy of two years after the bus incident, Butler’s family filed a lawsuit against Taser International. David Butler filed a product liability suit against Taser in Santa Cruz County Superior Court on Sept. 17. David chose not to sue the Watsonville Police Department. He believes that police officers were acting under false information– that the Taser is safe.

The lawsuit contends that Taser falsely claimed that its product is not capable of causing cardiac arrest when, in fact, according to the lawsuit, it can and did. The suit charges that Taser failed to warn police of that danger.

“Taser International put this product on the market without it being tested,” says Dana Scruggs, one of the Butlers’ two attorneys. “They say that it’s non-lethal and safe, and they didn’t know whether that’s true or not.”

Because officers believe the Taser gun is harmless, Scruggs says, they tend to use it cavalierly. Taser, he says, should warn police that the device can cause heart failure.

Taser International is no stranger to lawsuits. Amnesty International reports more than 300 people have died at the hand of a Taser gun since 2001. The company has been sued more than 100 times over deaths and injuries. Armed with well-paid experts and company-sponsored research studies that confirm its products safety, Taser has been extremely successful at deflecting liability. About 70 of those lawsuits Taser has either won or settled out of court. More than 30 cases are still pending.

The company had never lost a case—until June, when a federal jury in San Jose awarded Betty Lou Heston of Salinas a $6.2 million judgment. Heston’s son, Robert Heston, died after Salinas police officers shocked him 25 times with Taser guns. At the time, he was, like many Taser victims, high on methamphetamine. The jury found Taser 15 percent responsible for Heston’s death. Heston himself, they concluded, was 85 percent responsible for his own demise. The Salinas Police Department was also named in the suit but the jury found it not liable.

The case is significant not only because it marks Taser’s first loss in civil court, but because the jury awarded Heston punitive damages—$5.2 million of the settlement—based on the manufacturer’s failure to warn police agencies that repeated Taser shocks can cause cardiac arrest. However, last month a federal judge dismissed the punitive damages.

In cases of in-custody deaths involving Taser guns, the company argues that their product is an innocent bystander in an inevitable outcome. A controversial diagnosis of “excited delirium,” Taser argues, caused the deaths. Excited delirium is a muddled concept used to explain why some people—who are often high on drugs or alcohol—die suddenly while in police custody. Symptoms are said to include extreme agitation, aggression, raised body temperature, violent behavior and incoherence. The suspect’s state may be exacerbated by the use of force, including a Taser gun, pepper spray and physical restraint, or a combination of those tactics, but the excited delirium is the cause of death, Taser argues. The American Medical Association and the Canadian Medical Association rejecs the excited delirium diagnosis, although some medical examiners have, in the past few years, begun using it as an official cause of death.

(Taser sometimes sues medical examiners who disagree. In May, a judge in Ohio ordered the removal of Taser’s name from three autopsy reports.)

Other cases involve victims who died from a Taser-induced fall, like the incident in Brooklyn in September where a New York Police Department officer tased a suicidal man standing on a third floor fire escape. The man fell to his death. Days later, the officer who ordered the tasing killed himself.

The Butler case, say the family’s attorneys, is the first case brought to civil court in which a victim suffered cardiac arrest as a direct result of being shocked with a Taser. Butler was very drunk at the time of the incident. His blood alcohol level was 3.5 (.08 is legally drunk in California). He had THC in his bloodstream, but no stimulants that would have caused his heart to race were found in his system. Although thin—at 5’11, he weighed just 132 pounds at the time—he was healthy and had no history of heart disease. In fact David says he was an avid cyclist and often rode his bike from Watsonville to Santa Cruz and back.

“Most of the previous cases against Taser have been multi-factorial,” says John Burton, the Butlers’ other attorney, who also represented the plaintiff in the Heston case. “Butler’s cardiac arrest was directly caused by Taser current. There is no question, based on the medical history in this case, that the Taser stopped his heart. … There’s no other reason that he would go into cardiac arrest.”

Taser International, however, contends that its products cannot directly cause cardiac arrest and that they have the science to back it up. “We do not discuss ongoing litigation or lawsuits,” Steve Tuttle, vice president of communications for Taser, wrote in an email to GT, “but we have a record of 74 cases, that we have either won or have been dismissed and/or given summary judgment in our favor concerning wrongful death and product liability cases and have had one loss to date.

“We know that our Taser technology protects lives throughout the world and that medical experts studying Taser devices have concluded that they are among the safer alternatives to subdue violent individuals who could harm law enforcement officers, innocent citizens or themselves compared to traditional use-of-force tools,” Tuttle continues. “We stand firm behind the safety of Taser technology and will rigorously and aggressively defend any lawsuit filed against or by the company vigorously.”

A Safer Alternative?

Taser International sprang to life in 1993 in Scottsdale, Ariz. at the hands of company founders and brothers Rick and Tom Smith, who vied to develop a non-lethal alternative to the handgun. They began marketing the Taser gun first to private citizens as a personal protection device and later to police departments, private security companies, prisons and the military. Taser touts that its products save the lives of police officers and suspects every day by giving officers a safe and effective alternative to guns. Since 1998, more than 359,000 Taser devices have been sold to law enforcement agencies. Taser is by far the leading manufacturer of electronic control devices, or stuns guns, in the U.S. and the world.

Taser guns are designed to allow police officers to incapacitate an unruly individual from 15 to 35 feet away. The gun shoots two small probes into the person’s muscle tissue at a speed of 160 feet per second. The probes are connected to the gun by two thin wires. An electrical signal travels through the wires and into the muscle, pulsing 20 times a second into the muscle for a recommended interval of five seconds (although officers can keep the current going much longer). The electric shock temporarily overrides the nervous system, causing immediate loss of muscular control. The person becomes rigid and immobile, giving police officers time to move in and handcuff the subject. If it doesn’t work the first time, the officer can repeat the electric shock multiple times.

Sergeant Michael Ridgway of the Watsonville Police Department (WPD) attests to the Taser gun’s safety. Ridgway has been trained and certified as a master Taser instructor by the company. He is the primary instructor for electronic controls devices at the WPD and has been tased several times himself in demonstrations. All Taser device training originates with the company.

Taser schooled Ridgway well on safety issues, he says. For example, he was taught to avoid tasing the very young or very old, pregnant women, people in water, or people standing on the edge of a building. (Taser’s warnings do not include “avoid tasing in the chest.” In fact, the legs and torso are preferred targets, according to Taser literature.)

“Outside of getting total compliance from a subject, there is no better tool than the Taser,” Ridgway says. “It minimizes the possibility of injury for everybody.”

He denies vehemently that a Taser shock can cause heart failure. “The Taser is powered by a three-volt lithium battery,” he says. “It’s not capable of generating enough power to affect the heart.”

However, Ridgway concedes, “I’m not a doctor. All I can do it regurgitate the statistics that are given to me by Taser. But to discredit information provided by Taser is to discredit the people that are most knowledgeable about Taser.”

What does Taser know about Taser? In press materials, Taser reports that the amount of electrical current delivered to the body by the Taser X26, the device used on Butler, equals .0021 amps, a tiny fraction of the power emitted by an average Christmas Tree light bulb (one amp) or a standard 110-volt wall socket (16 amps). The X26 runs on two lithium digital camera batteries.

The heart muscle thumps to the rhythm of electrical pulses generated by the heart’s sinoatrial node. Yet Taser insists that its products do not interfere with the heart’s electrical system. Numerous scientific studies back up that claim—200 of them are listed on Taser’s website.

Taser highlights most prominently a 2005 study published in Pacing and Clinical Electrophysiological acclaiming Taser’s cardiac harmlessness. The study stunned pigs of comparable human weight and tried to stop their hearts, concluding that it takes 28 times the power packed by a Taser gun to induce cardiac arrest in the pigs. (A 2006 pig study had opposite results. A team at a Chicago hospital stunned 11 pigs for 40 seconds, twice. Every one of them developed arrhythmia, or irregular heartbeat, a precursor to cardiac arrest.)

A study released this year by the Engineering in Medicine and Biology Society concluded that chance of VF caused by a Taser gun is one in 1.27 million. Another study, published in the Journal of Emergency Medicine in 2007, briefly shocked 105 volunteers with a Taser and monitored their hearts. While all of the volunteers experienced significant increases in heart rate immediately after the shock, it did not interfere with the rhythm of the heartbeat, indicating that the Taser does not cause VF.

“The worst that can happen is you put out an eye,” Ridgway says.

Growing Scrutiny of Stun Guns

The problem is, Taser International has never had to conclusively prove to the public that its product is safe and non-lethal. Electronic control devices are practically unregulated in the U.S. In 1994, the U.S. Bureau of Alcohol, Tobacco and Firearms declared that the Taser gun in not a firearm and therefore not subject to federal regulations on firearms. Since the Taser is not a medical device, it’s not subject to the Federal Food and Drug Administration’s labyrinthine testing process.

But in light of growing concern over Taser-related deaths—and pressure from watchdog groups and anti-Taser activists—governments are starting to take a look at the Taser.

The death last year of a Polish immigrant after being tased by Royal Canadian Mounted Police in the Vancouver airport prompted the British Columbia provincial government to open an inquiry into the death. The inquiry, headed by Judge Thomas Braidwood, began in February and is scheduled to continue into 2009. The U.S. Department of Justice (DOJ) is also currently investigating Taser-related deaths. In its interim report, released in June, the DOJ offered a cautious exoneration. A final report is due next year.

“While exposure to conducted energy devices (CEDs) is not risk free, there is no conclusive medical evidence that indicates a high risk of serious injury or death from the direct effects of CEDs,” the DOJ report states. “The purported safety margins of CED deployment on normal healthy adults may not be applicable in small children, those with diseased hearts, the elderly, those who are pregnant and other at-risk individuals.”

And therein lies the rub, Taser critics charge. Little or no testing has been conducted on populations most likely to cross the path of a Taser–drug addicts and the mentally ill. Nor have researchers taken trigger-happy cops into account.

“These products are being sold by Taser to be used on people who are vulnerable to ventricular fibrillation,” says attorney Dana Scruggs. “They are used on people who are high on drugs and are being unreasonable and won’t obey commands. They’re not going to use a Taser on a guy with a gun or with someone who is being rational. So it’s not only possible but foreseeable that the Taser would be used on people high on drugs or alcohol or mentally ill. That’s the suspect they are marketing this to police for.”

Amnesty International (AI) contends that Tasers were widely deployed in the U.S. before the results of rigorous, independent and comprehensive testing of potential health risks. “While existing research has found the risk of adverse effects from Tasers in healthy adults generally low, studies have also pointed to the need for more understanding of the effects of such devices on those compromised by poor health, substance abuse or other factors,” the agency stated in a 2007 press release. The release went on to summarize a review of 290 suspects tasered by police. AI found that 92 of them were shocked between three and 21 times. One suspect was shocked continuously for 57 seconds. That sort of prolonged exposure, AI argues, has not been well studied.

Dr. Zian Tseng, a cardiologist at UCSF Medical Center, has been warning of the dangers of Taser guns for years. “There are vulnerable periods in the cardiac cycle when shock can cause dangerous arrhythmias,” Tseng says in a Jan. 5, 2005 San Francisco Chronicle article. “If you are shocking someone repeatedly, it becomes like Russian roulette. At some point you may hit a vulnerable period.” He went on to suggest that officers carrying Taser guns should also carry defibrillators in their cars.

In May of this year, Tseng told the Braidwood Commission that the research touted by Taser doesn’t take “real world” circumstances into consideration. “What’s not allowed in these theoretical calculations are worst-case scenarios,” he said. “Tolerability in healthy volunteers under optimal conditions does not mean safety.”

Tseng also told the commission that, following his comments to the press in 2005, Taser contacted him and asked him to reconsider his comments and offered him a research grant. He declined.

Lives Changed Forever

When Butler finally woke up after three days in a coma, his sister was by his bedside. Butler didn’t recognize her. He swore over and over again that she was not his sister. He didn’t remember that he had been married. He thought he was a firefighter (he’s not) and insisted that he be released from the hospital so he could get back to work. He couldn’t walk or feed himself, and he had developed incontinence, which to this day requires him to wear adult diapers to bed.

After a few days in Watsonville Community Hospital, he was transferred to Dominican Hospital’s rehabilitation center in Santa Cruz, where he learned to walk and feed himself again. He now lives with his parents, who are in their seventies and “devastated” by Butler’s condition, his brother, David, says. Butler’s long-term memory remains mostly in intact, but his short-term memory is shot. He can’t remember from one minute to the next. Despite treatment at the Cabrillo College Stroke and Acquired Disability Center five days a week, his prognosis is bleak. His doctors say he will unlikely regain any more memory.

David now serves as his caregiver seven days a week. As a full-time family caregiver, he draws a small stipend from the state. The brain damage affected Butler’s coordination, so he needs help getting in and out of bed and the shower. Plus, he has to be under constant supervision due to his lack of short-term memory. If he walked off down the street alone, he wouldn’t remember where he was a moment later.

“I’ve been with him every day since Oct. 7, 2006,” David says. “I care for him from the time he gets up to till the time he goes to bed.”

David takes Butler to his doctor’s appointments and to the stroke center, and he rations his brother’s cigarettes. Otherwise Butler would chain smoke because he can’t recall the last time he had one. Sometimes they go on outings, to the beach or a park. Once, David took his brother to Raging Waters. “We had fun, but as soon as we left the park, he forgot all about it,” David says.

And that’s what hurts the most—that the Butler family can’t share their day-to-day experiences with Steve because he can’t remember them. He’s had to relive the death of his grandparents again and again, each time he asks how they are. He can’t remember mundane facts—whether or not David is married or when the bamboo was planted in his parents’ front yard. He’ll often ask family members the same question over and over and over again.

“A couple of months ago he kept saying, ‘Arnold Schwarzenegger is our governor, huh?’ And I’d say yes,” Plumlee says. “‘But he’s not American,’ he’d say. ‘Well I guess that’s OK.’ Exactly 30 seconds later he would say the exact same thing, 20 or 30 times.”

His personality has changed, too. He’s somber and listless. He keeps his arms down and close to his body. “He’s like a zombie,” David says. “He has almost no emotions now, either. I never hear him laugh, except when we went on the water slide at Raging Waters.”

“I lost my brother,” Plumlee says. “I would have preferred they had hit him in the leg with a billy club. I would have even preferred that they had shot him in the foot. To me, the Taser is torture. It’s ruined his life, ruined his family’s life. He’ll never be the same.

“I hope out of the lawsuit they at least put a black-box warning on Tasers saying that they can kill you.” Plumlee says. “They say they’re safe and they’re not. We did fine without them before, and now too many people have died.”

Thursday, August 14, 2008

What does a taser do to the human heart?

By Dayo Olopade | TheRoot.com

August 1, 2008--On January 17, 21-year-old Baron Pikes was stopped by the police. Nearly half a million volts of electricity later, he died on the street. Handcuffed, held down and stunned with a Taser-brand electro-weapon seven times before he died (and then twice more after that), Pikes' heart, the coroner notes, simply gave out. Amnesty International estimates that in the past seven years, 150 people have been killed after being shocked by stun guns like Tasers. But that's still a very small fraction of the population, even that fraction being stunned by police officers or worried civilians. So just how can a Taser—designed to be non-lethal force—kill you?

Tasers, often shaped like pistols, use compressed nitrogen to fire two darts at a target. The darts are connected to the gun by insulated wires that give it a range of up to 21 feet. Once the darts make a connection with a target, the Taser sends 50,000-volt electric pulses into the victim's body, causing intense muscle spasms and sharp pain. Seized, the victim often falls to the ground.

While 50,000 volts sounds like a lot, humans are actually able to conduct electricity—which is why we tend to steer clear of open sockets or stick forks into toasters that could give us a nasty shock. But despite the high voltage of a Taser's current, the relatively low amperage on the device is what allows it to immobilize but not kill you. (Being struck by lightning, by comparison, kills frequently because it sends an exponentially greater amount of voltage and amperage through a victim, at levels that our bodies just can't handle.)

Still, Taser shocks are dangerous in general because they interfere with the most important muscle in the body—the heart. When your heart beats normally, it is, like the rest of the body, already in the process of conducting electricity. The biological process that lets your heart rhythmically contract and pump blood represents "electricity going to the heart in an organized way," says cardiologist Abraham Kocheril, a specialist in electrophysiology at the University of Illinois at Chicago. So if someone gets a mini-jolt of electricity from the outside, be it from a live socket or a hospital defibrillator, they'll probably live.

But the shock had better be at the right place and the right time. Each time the heart beats, it charges and discharges stored electricity. In between contractions, the heart automatically goes into a brief recovery mode called diastole. In that tiny window of recovery time, a sudden jolt of electricity could cause the heart muscle to go into ventricular fibrillation (VF), which is essentially the first stage of a heart attack. The heart begins to pump erratically, if at all, and blood pressure drops to nothing, leaving no oxygen available for brain and body cells.

The effects of any major disruptions during this brief diastolic window can be swift and catastrophic. When young children are hit by a baseball or athletes are struck forcefully in the chest, these blows can be transduced into an electric jolt. If these shocks occur while the victim's heart happens to be vulnerable, the rhythm is disturbed and the body goes into VF, hypertrophic cardiomyopathy or cardiac arrest. This possibility is the most common explanation of sudden, sports-related deaths.

So what about Baron Pikes? Well, if somebody is prone to dying suddenly or has a weak heart, then a 50,000-volt stress would precipitate it. Some prior Taser deaths, such as one in Fayetteville, N.C., occurred because the victim was in an altered state, on drugs. Another death, in Colorado, was chalked up to the vigorous foot chase that preceded the police's use of the Taser. But people at risk of this outcome are typically those who have had heart disease, heart failure or certain congenital abnormalities.

In the case of Pikes, a healthy 21-year-old, the initial six shocks probably got him at a time when his heart was contracting, and he was not adversely affected (beyond the muscle spasms, confusion and immobility). Cuffed on the ground and in the back of a squad car, he would not have been exerting himself—nor were there more than trace amounts of drugs in his system. But that seventh time, the Taser more than likely hit Pikes' heart when it was in diastole, sending him into VF and toward sudden death.

Once a person is in VF, spontaneous recovery is rare. Ironically, the solution to the problem is to administer another electric shock—well-known to provide instant theatrics for so many network hospital dramas. In one reported case, a man was Tased while suffering from atrial fibrillation (which affects the upper chamber of the heart, not the part responsible for pumping blood. The Taser shock turned out to be therapeutic, bringing his heart back into correct rhythm. In Pikes' case, the police did continue to Tase him, without the happy ending. The coroner's report states that the last two shocks were administered after he was dead.

So the Taser, while marketed as an effective way to stop a bad guy cold without killing—and even, at times, as a women's fashion accessory—is actually a form of physiological Russian roulette. The odds of the unthinkable increase the more times one is subjected to the powerful electric current. Cruelly, Pikes made it through six rounds, which would have emptied a gun clip in a real game of chance. Tase me once, shame on me. Tase me nine times—well, the odds aren't good.

Dayo Olopade is a reporter at the New Republic.

Saturday, July 05, 2008

Teen hit by Taser died of cardiac arrest - Doctor finds no pre-existing heart problems in youth who was shocked by police officer at grocery store

HERE COMES THE JUDGE:
TASER INTERNATIONAL VS. DR. THOMAS OWENS, Medical Examiner
Don't believe the taser manufacturer would target a medical examiner? See "Judge rules for taser in cause-of-death decisions"


July 4, 2008
By Cleve R. Wootson Jr. and Franco Ordoñez
The Charlotte Observer

A 17-year-old shocked with a Taser by police after an altercation at a northern Charlotte grocery store died from cardiac arrest, according to an autopsy released Friday.

Darryl Wayne Turner's heart was pumping so fast and chaotically from the Taser shot and stress of the confrontation that it stopped pumping blood properly. He died of acute ventricular dysrhythmia and ventricular fibrillation, according to the Mecklenburg medical examiner's office.

Turner was the first Taser-related fatality in the Charlotte-Mecklenburg Police Department's history and the youngest in the Carolinas this decade.

Police confronted an “agitated” Turner on March 20 during an argument with his manager of a Prosperity Church Road grocery store. Police said Turner threw something at a manager, ignored commands and advanced toward Officer Jerry Dawson Jr., who deployed a Taser. The energy weapon struck Turner in the chest, and he fell to the carpeted floor.

“This lethal disturbance in the heart rhythm was precipitated by the agitated state and associated stress as well as the use of the conducted energy weapon (Taser) designed for incapacitation through electro-muscular disruption,” Dr. Thomas Owens wrote in the autopsy.

Owens found no pre-existing heart problems.

Turner worked at the Food Lion store, where he was a cashier and bagged groceries. Documents state he was asked by a manager to leave the store but refused. Police said Officer Jerry Dawson Jr., a 15-year veteran, fired his Taser to get Turner under control after the teen advanced toward him. An attorney representing the family says he talked to a witness who refutes the account.

An April study by the Taser Safety Project found that the improper use of Tasers has contributed to the deaths of at least 11 people in North Carolina over the past four years. The autopsy cites a National Institute of Justice study that concludes that while Tasers devices are not risk-free, there is “no conclusive medical evidence” indicating a high risk of serious injury.

Thursday, July 03, 2008

Teen shocked by taser died from change in heart rhythm

March 7, 2008
WSOCTV

http://www.wsoctv.com/news/16783664/detail.html

CHARLOTTE, N.C. -- Autopsy results released this week reveal why a 17-year-old who police shot with a Taser died in March.

Darryl Turner was in an altercation with his boss at the Food Lion on Prosperity Church Road in north Charlotte when someone called police. Police said he was highly agitated when an officer shot him with a Taser. Turner was pronounced dead at the hospital a short time later.

Turner's autopsy says the stress of the situation and the shock from the Taser was too much for his body to handle. It says he died of acute ventricular dysrhythmia and ventricular fibrillation. In other words, his heart was pumping so fast and irregularly that he died.

The report states Turner did not have heart problems and he didn't have drugs in his system except for the medicines emergency workers used trying to save his life.

Turner's grandfather, Donald Fontenot, saw the report and said he's angry.

"Very much so. Why wouldn't I be? You know, you take a 17-year-old child away," he said.

Turner's family has not said whether they plan to sue police. They hired an attorney in March after a witness said Turner was obeying the officer’s commands when he was shocked. Police said Turner had been threatening the officer.

Police are doing their own internal investigation to see if the officer who used the Taser followed the rules. That officer is back on active duty after being put on administrative leave following the incident.

Thursday, May 22, 2008

People with heart disease more vulnerable when tasered, inquiry told

May 22, 2008
Neal Hall, Vancouver Sun

VANCOUVER - Taser shocks of a person with heart disease increases the probability of death, a Montreal biomedical engineer told a provincial Taser inquiry today.

"There is a strong statistical association between Taser related deaths and heart diseases," Pierre Savard told inquiry commissioner Thomas Braidwood.

He also said the current studies on healthy people or healthy animals are insufficient to conclude that the Taser weapon is completely safe.

Savard pointed out the placement of Taser darts within 1.6 centimetres of the heart could stimulate heart tissue and lead to ventricular fibrillation, which causes the heart to quiver, desynchonizing the pumping action of the heart chambers, causing a drop in blood pressure. Such an occurrence, he said, requires the use of a defibrillator to get the heart to return to its normal rhythm.

"The known effects of the Taser on the heart rate are similar to those of two standard diagnostic tests used by cardiologists: the stress test and programmed electrical stimulation," explained Savard.

"These two tests necessitate the use of defibrillators because of their inherent risk" said the professor at the Ecole Polytechnique de Montreal.

He made his presentation via video conferencing and showed a number of diagrams to illustrate how heart disease can be affected by Taser shocks.

The Taser delivers short pulses of electrical current through electrodes over the surface of the body, causing automatic muscle contraction and incapacitation.

Savard said the current is insufficient to cause heart tissue damage in a normal person, but could affect a person with heart disease and cardiac scar tissue.

He said a Taser shock sends a message to the brain, which goes into a state of alarm and causes the automatic nervous system to prepare the body for a "fight or flight response."

The heart rate jumps to 137 beats per minute (72 beats per minute is normal), he said, pointing out that in subjects with coronary artery disease, the blood flow is insufficient to satisfy increased cardiac metabolic needs, which is known as ischemia.

"Some ischemic tissue may show abnormal automaticity and generate ventricular tachycardia, that can be followed by ventricular fibrillation," Savard said.

He explained he began researching the issue after the death last Oct. 14 of Polish immigrant Robert Dziekanski, who was jolted twice with a Taser at Vancouver International Airport by RCMP. An amateur video of the incident, posted on the Internet, caused an international public outcry and led the B.C. government to order the inquiry.

The first stage of the inquiry is looking at Taser use in general. The second part, expected in the fall, will probe the circumstances surrounding the death of Dziekanski.

Dziekanski wandered around a secure area of the airport for seven hours, looking for his mother who had come from Kamloops to meet him. He appeared tired, disoriented and began behaving erratically. He was eventually confronted by police, shocked with a Taser and restrained by RCMP officers. He died minutes later.

Wednesday, May 21, 2008

Police need to know tasers can kill: MDs

May 21, 2008
Suzanne Fournier, The Province

Tasers can cause fatal cardiac arrest and are especially dangerous if the person being Tasered is agitated, stressed, dehydrated, exhausted or has heart disease, two top Vancouver heart specialists warned yesterday.

The Taser may be particularly dangerous if a dart hits close to a person's heart and is hazardous to any of the more than 35,000 British Columbians who have pacemakers or implanted defibrillators, the doctors told the Braidwood Inquiry into Taser use.

Police forces need to know the risks of using the Taser and be fully-trained in resuscitating heart-attack victims, the specialists said.

Dr. Michael Janusz, a heart surgeon at Vancouver General Hospital and a professor at the University of B.C., warned the inquiry that "Tasers must be regarded as being capable of causing cardiac arrest."

The Taser might be safer than a gun or club, said Janusz, but it can cause cardiac arrest and police should be "cognizant of this hazard. This will require a 'mindset' of providing immediate, thorough and meticulous care of critically-injured persons."

Janusz told commissioner Tom Braidwood, a retired B.C. judge, that the risk of dying after being Tasered is similar to the chances of dying during or after major heart surgery.

Janusz cited San Francisco cardiologist Dr. Zian Tseng's findings of about "1.4 per cent mortality for individuals subdued by police using a Taser, [which] is similar to the mortality risk of a coronary-artery bypass operation."

Dr. Charles Kerr, a cardiac electrophysiologist at St. Paul's and a UBC professor, warned that "the perception one gets is that the police officers do not seem to recognize that situations in which a Taser is used could lead to death."

Kerr said there may be a place in policing for the Taser and it is "better than a bullet," but he said it is essential that police understand "there is a potential for harm."

Kerr said although the possibility is low, it appears that even one dart of the dual-dart weapon hitting near the heart could trigger ventricular fibrillation, in which
the heart beats wildly and then stops.

People with "psychiatric disturbance" or who are on drugs are even more at risk, said Kerr.

Even "the pain inflicted by the Taser discharge" and the "extremely agitated state of most people receiving a Taser shock" increases the likelihood of ventricular fibrillation, he said.

As if to underscore the medical specialists' cause for concern, New Westminster police Staff-Sgt. Joe Spindor said later that most Taser training in B.C. is done by the manufacturer or by others like him who have been trained by Taser International.

"They stated the Taser is safe," said Spindor, explaining he was not told it could cause cardiac arrest.

Spindor said police in B.C. do not yet collect or share data on Taser use or its consequences.

Police do not carry defibrillators, said Spindor, who said the New Westminster police have used the Taser without incident since 2000.

Braidwood is inquiring into Taser use by municipal police, sheriffs and corrections officers.

Tuesday, May 20, 2008

Tasers could cause cardiac arrest, doctor says

May 20, 2008
Neal Hall, Vancouver Sun

The electrical shock from a Taser stun gun used by police could cause cardiac arrest, a Vancouver heart surgeon told a Taser inquiry today.

"One can conclude the risk of death from a Taser is small but not insignificant," said Dr. Michael Janusz, a heart surgeon at Vancouver General Hospital.

"Tasers must be regarded as being capable of causing cardiac arrest," he said. "The device appears to be safer for all concerned, including bystanders, than guns and clubs, but its consequences are not trivial," he added.

"Hearts don't simply stop," he told inquiry commissioner Thomas Braidwood.

Janusz said there has to be underlying heart disease or other contributing factors such as lack of oxygen due to asphyxia or massive blood loss or severe metabolic abnormalities such as acidosis or abnormal potassium levels.

He said first responders should be thoroughly trained in providing first aid and use of a defibrillator.

Another expert, Vancouver cardiolist Dr. Charles Kerr, made s similar submission.

Janusz also questioned the credibility of Taser International, the manufacturer of the Taser. The company maintains Tasers could not cause cardiac arrest.

"This creates a problem with respect to the credibility of the company and could lead to difficulty in dealing with the company in matters of safety standards and training requirements," he said.

Kerr, who practises in the field of electrophysiology and is current head of the Arrhythmia Management program at St. Paul's Hospital and the University of B.C, told the inquiry that a heart beats as the result of an electrical impulse.

Of most concern about the use of the Taser is the electrical function of the heart ventricles, the main pumping chambers of the heart.

Kerr said there is a potential for harm and cardiac arrest.

"It is my opinion that there is a small possibility that an electrical discharge from a Taser dart could directly induce ventricular fibrillation," he said.


Kerr said the pain inflicted by the Taser causes intense muscle contraction, an increase in heart rate and adrenaline-like chemicals and sympathetic nerve discharge.

"This coupled with subsequent physical restraint of the individual could also result in the inability to breath adequately and possibly a drop in oxygen levels and changes in the acid balance in the blood, which would make the patient more prone to ventricular arrhythmias."

While the Taser appears to be a much safer weapon than guns for both victims and police, police do not seem to recognize that Taser use could lead to death, Kerr said.

In such situations, he added, people should be ready to perform cardio-pulmonary resuscitation and use automatic external defibrillators.

"It would seem reasonable to recommend that an automatic defibrillator be readily available in such circumstances," Kerr said.

Cardiologist, heart surgeon tell Taser inquiry weapon can cause cardiac arrest

May 20, 2008
The Canadian Press

VANCOUVER — Two heart specialists told an inquiry into the use of Tasers on Tuesday that a jolt from the weapons can "almost certainly" cause heart problems and possibly even sudden cardiac arrest.

Dr. Michael Janusz, a heart surgeon and professor of surgery at the University of British Columbia, told the inquiry that based on his study of available literature on Taser use, "almost all physicians would conclude that Tasers can induce ventricular fibrillation."

The hearing was told ventricular fibrillation is an extremely rapid rhythm in the heart's lower chambers, leading to ineffective contractions of the heart.

"In summary, Tasers almost certainly can cause cardiac arrest in humans, particularly in people with underlying heart disease," Janusz said.

A spokesman for Taser International has told the inquiry that Tasers are not risk free and that the term "non-lethal" does not mean safe.

Taser International has maintained there's a big distinction between a Taser jolt being the cause of a death and it being a contributing factor.

Dr. Charles Kerr, another UBC professor and a heart surgeon, told the inquiry Tuesday that based on his reading of animal studies and the agitated state of most people who receive a Taser shock, he has concluded a Taser jolt could induce ventricular fibrillation.

"Whatever the cause of death in patients receiving Taser discharges, there does appear to be the potential of a cardiac arrest situation, as has been demonstrated on a number of occasions," Kerr said.

In a state of ventricular fibrillation, "the heart cannot pump blood and, unless it is interrupted quickly, sudden cardiac death will follow."

Both men also agreed outside the inquiry that the Taser may still be preferable to a firearm or a club.

Kerr was asked whether they should be used when many questions about their safety remain unanswered.

"My personal opinion is that they are probably better than a bullet but I think we need to have the understanding that the entire situation, whether it's the Taser or (Taser contribution) there is no question that there have been situations of sudden death," Kerr told reporters.

Janusz said each situation that a police officer uses a Taser has to be judged independently. "Certainly in many or most situations it's a safer alternative than a gun or a club. "But I believe the risks are there and you have to be cognitive of the risks and be prepared to deal with any consequence arising from it."

The current phase of the inquiry is looking at the use of the weapon in general and the next phase will look specifically at the death of Robert Dziekanski at the Vancouver airport last fall, after he was hit with an RCMP Taser.

Wednesday, May 07, 2008

Canadian researchers dispute taser safety

May 7, 2008
CTV British Columbia

Canadian medical researchers are disputing the theory that stun guns do not cause irregular heart rhythms that are sometimes fatal.

Tests had shown that Taser shock could cause fibrillation -- a very rapid, irregular contraction of muscles fibers -- in any muscle, except the heart.

"Bottom line is we think that assumption is incorrect," said Dr. Paul Dorian, a medical researcher from the University of Toronto. "Under certain circumstances, the Taser electrical discharges can, in fact, cause the heart muscle to beat and to beat very fast."

Dorian and his team shocked six pigs with stun guns looking for signs of ventricular fibrillation (VF) and other adverse heart effects. The results echo a recent Chicago study, where prolonged stun gun shocks caused VF.

Two pigs died in the Chicago study. One pig died of VF in Dorian's study and the other five pigs showed cardiac disturbance.

When it occurs in humans, VF can be lethal, Dorian said.

"When this rapid irregular heart rhythm occurs, the heart doesn't beat effectively," Dorian told CTV News. "No blood is pumped from it, and the victim, unless they get CPR and gets an electrical shock to the heart, will die within 10 minutes."

In response to the Toronto study, manufacturer Taser International said it will present results from three cardiac studies of its own later this month at the Heart Rhythm Conference in San Francisco, California.

"Taser International is dismayed by attempts to present this information as something it is not," the company said in a statement.

"I can understand if they're dismayed," Dorian said. "I'm dismayed as well. Dismayed that we have a technology that potentially can cause harm."

When Victoria police conducted Canada's first Taser trials in 1999, VF was the medical problem they were most concerned about.

But no one was considering the adverse effects of another medical condition caused when muscles are shocked and contract too quickly. High levels of acidity, or low levels of alkalinity in the body fluids, including the blood, can cause acidosis.

"The problem with acidosis is that the organs don't function properly when the acids are present in the blood," Dorian said.

Inspector Darren Laur, who spearheaded the Victoria Taser trial, told CTV News in an email that VF was the only medical concern of their research.

"I was not involved in any studies surrounding acidosis," he wrote.

Ken Stethem, a use-of-force expert from Washington, D.C. said acidosis, which worsens if victims are stunned repeatedly, needs to be considered in the Taser debate.

"These devices being used and backed up by policies that don't limit the number of stuns of the length of the exposure times -- it's hard to believe how that would support public safety," Stethem said.

The officer who is in charge of the Taser program for the Victoria police department told a public inquiry Tuesday that he's uncertain if Tasers cause death.

"I think I would be negligent as a police trainer if I stood up here and said they don't cause death," Constable Mike Massine told inquiry commissioner Thomas Braidwood, a retired B.C. Court of Appeal judge who is conducting the first public inquiry into the controversial use of Tasers.

"I don't know if they do. I don't know if they don't," the officer added. "Maybe there is a correlation, I don't know. I hope when we find out what it is, I hope we find that silver bullet."

Massine said putting a moratorium on Tasers would cause a knee jerk reaction, adding stun guns are a necessary tool for officers facing violent suspects.

The inquiry, which started Monday in Vancouver, is scheduled to continue until May 23.

With a report from CTV British Columbia's Peter Grainger

Wednesday, September 05, 2007

Can taser directly cause ventricular fibrillation?

"Conclusions: It is possible to cause ventricular fibrillation in pigs using a taser EMD device. From these data we can now proceed to investigate the probability of taser induced VF in humans."

Thursday, June 14, 2007

CBC Documentary - Taser Deaths

In a Radio-Canada/CBC in-depth documentary on Tasers, produced by Frederic Zalac and aired nationally on Canadian television at the end of last year, the conclusions of recent independent medical reviews of Tasers were revealed which raised some very serious questions about the lethality of Tasers.

The documentary, in which I very enthusiastically participated, is about 20 minutes in length and is available online at CBC News. Scroll down and click on (or search for) “Taser Deaths”.

Highlights include:

Dr. Stanley Nattel, Cardiologist at the Montreal Heart Institute, Director of the Paul-David Chair in Cardiovascular Electrophysiology and leading cardiology researcher at the University of Montreal, and an associate professor at McGill University, analyzed a study performed at the University of Toronto (see below) and concluded that “A rapid rhythm induced by a Taser, called a Ventricular Tachycardia, may not cause very severe symptoms and particularly if the person is very excited, frightened, etc., they might not even notice it. But that kind of rhythm can eventually what we call “degenerate” to Ventricular Fibrillation, which is an even faster and irregular rhythm that is rapidly lethal.”

Dr. Nattel said further that “the way in which the Taser causes death is by provoking a very rapid, irregular heart rhythm, and that doesn’t leave any traces in the body. So basically if you don’t see anything there, you don’t know what the cause is and it could be a lethal dose of drugs or it could be an extreme mental stress or it could be the Taser. I don’t think it’s possible to differentiate those possibilities in most cases.”

An independent study in Canada on the effects of Tasers on pigs was performed at the University of Toronto by Kumaraswamy Nanthakumar, MD; Ian Billingsley, MD, Stephane Masse, MASc, Paul Dorian, MD, Douglas Cameron, MD, Vijay S. Chauhan, MD, Eugene Downar, MD and Elias Sevaptsidis, DEC. This study injected into pigs a substance that mimics the adrenaline rush that would be experienced during a stressful arrest by police or a cocaine high. The pigs were then shocked with Tasers. The study found that, in circumstances of increased adrenalgenic stress, arrythmias (irregular heart rhythms) were caused and, in some cases, were lethal. (Journal of the American College of Cardiology)

In the U.S., Dr. John Webster, Biomedical Engineer, University of Wisconsin tried to duplicate the situation that would occur with humans … and “we got very different results. I don’t think that they’re non-lethal weapons but I think that there’s a probability, albeit small, that the Taser could electrocute a person.”

When asked by Radio-Canada reporter, Frederic Zalac, what he would do if a study showed there was a risk, Taser International spokesperson Steve Tuttle answered by saying, “We would have an obligation to disclose that to our customers and to the public. That’s pure and simple.”

To the best of my knowledge, Taser International has never disclosed these results to its customers or to the public.