HyCoSy

Hysterosalpingo Contrast Sonography (HyCoSy)

Hysterosalpingo Contrast Sonography or HyCoSy is an investigation of the fallopian tubes. It is very difficult to see all parts of the fallopian tubes on a normal ultrasound scan. The test is an important part of infertility investigation. The fallopian tubes carry the egg from the ovaries to the uterus. If the tubes are damaged or blocked it may be difficult to become pregnant.

The patient does not need to be referred to another team for tubal assessment as HyCoSy is usually performed with the fertility specialist-gynaecologist. The test result can help the doctor plan any future care for the patient.

The test is performed by a specialist sonographer. You will lie on your back with your legs apart (like for a cervical smear test). A thin plastic tube will be inserted through the vagina into the uterus and a special dye will be injected through the tube, allowing the fallopian tubes to be seen on the scan.

A high vaginal swab for sexually transmitted infections, partner’s semen analysis and patient’s ovulation assessment before a test of tubal patency is recommended. Before performing the HyCoSy test, a transvaginal ultrasound scan should be done to look for any obvious abnormalities of the fallopian tubes and uterus.

The procedure can be undertaken around 7-14 days from the start of the woman’s period. 

There are no special preparations needed before the procedure. The patient will only be asked to empty the bladder.

Whilst the procedure is unlikely to be painful, some women may experience cramping pains during and shortly after the scan. The patient can be advised to take a painkiller such as ibuprofen or paracetamol half an hour before the procedure.

The procedure takes about 30 mins. 

After the procedure, the patient can be accompanied home (but not on public transport) if the patient doesn’t experience any pain or discomfort.

The results of the test are discussed with the patient immediately after the procedure.

If indicated, the patient will be given a prescription for antibiotics.

The pelvic infection risk with HyCoSy is rare.

The infection rate is 0.095%. The procedure is generally well tolerated. Allergies to foam are not common. 

If the HyCoSy reveals an abnormality, surgery may be required to investigate further.