HyCoSy (Ultrasound Scan & Dye Test)
HyCoSy stands for Hysterosalpingo Contrast Sonography.
A HyCoSy test is used to check whether the fallopian tubes are opened or blocked. If the tubes are damaged, it may be difficult to become pregnant. It is not possible to see the tubes with normal ultrasound, so injection of dye is a specialised examination that has to be done.
The procedure has to be done in the first half of your menstrual cycle to ensure you are not pregnant at the time of doing the test. It is essential that you have been screened for Chlamydia before the procedure.
It is extremely important to refrain from sexual intercourse (protected as well as unprotected) from the start of your period and until the procedure has been done. You may be prescribed antibiotics after the procedure
You will have a transvaginal ultrasound first. This is a routine gynaecological procedure and does not hurt. A speculum will then be put into your vagina (as for a cervical smear examination) and a small catheter (tube) will then be passed into the uterus through the cervix. Under ultrasound control, a small amount of foam will then be passed into the uterus. If the tubes are open, the foam will be seen passing through the tubes on the ultrasound screen.
Sometimes HyCoSy can be inconclusive about the condition of the Fallopian tubes. If this is the case, you may be offered laparoscopy and dye test which is the gold standard technique to test the Fallopian tubes. However, laparoscopy is a surgical procedure that has to be done under general anaesthesia. Hence, it is recommended to test the Fallopian tubes using a simple technique such as HyCoSy and if HyCoSy is inconclusive, laparoscopy & dye test should be considered.