Ultrasound HyCoSy (Hystero-contrast-sonography) is used to examine the uterine cavity and fallopian tube patency relatively quickly and easily in an outpatient procedure with minimal pain.
During the examination, sterile physiological saline is delivered through the vagina into the uterine cavity using a catheter, and then the pressure and rate at which fluid can flow through the fallopian tubes into the abdominal cavity is monitored. If the results are favourable, at least one of the fallopian tubes is sure to be patent.
If the injected fluid is not drained from the uterine cavity into the peritoneal area after a prolonged, high-pressure attempt of 1-3 minutes, both fallopian tubes can be assumed to be blocked. Later consultations are aided by the pictures taken during the examination.