Venous intravasation when using water soluble contrast media, is considered an innocuous finding. May be seen up to 6% of cases, sometimes even in healthy patients. Common causes include recent uterine surgery, tubal block and excessive injection pressures.
REFERENCE:
Ubeda B, Paraira M, Alert E, Abuin RA. Hysterosalpingography: spectrum of normal variants and nonpathologic findings. AJR Am J Roentgenol. 2001 Jul;177(1):131-5.
