A tubal cannulation is an infertility treatment performed to clear a blockage in the section of the fallopian tube nearest the uterus.
With the patient under conscious sedation, a thin catheter is threaded through the cervical opening and into the uterine cavity. In order to confirm a blockage, X-ray sensitive dye is injected through the catheter and its movement is observed. If the dye fails to move into the tube and out into the abdominal cavity, a blockage is present. To clear it, a second, thinner catheter and guide wire are inserted into the fallopian tube in order to push out the debris.
This infertility treatment is effective for women who have both fallopian tubes blocked. After a tubal cannulation, the chances of natural conception are significantly improved, although, in some cases, a procedure such as artificial insemination/IUI may be used to help maximize the probability of success.