HyCoSy for Tubal patency assessment


Blockage of the fallopian tubes due to various causes including endometriosis and pelvic infection has long been known as a cause of infertility.  Prior to the development of HyCoSy, hysterosalpingography (HSG) and laparoscopy with dye were used for routine investigation of tubal patency. These techniques are expensive, time consuming and unpleasant for the patient as they involve surgery, general anaesthesia and hospitalisation.


Hysterosalpingo-contrast-sonography (HyCoSy) is a transvaginal outpatient ultrasound technique used to confirm tubal patency.  A solution of galactose and 1% palmitic acid (Levovist) is infused into the uterine cavity and observed to flow along the fallopian tubes. The bright echoes generated by the Levovist and colour Doppler imaging are used to confirm tubal patency. 


Because of its convenience and safety, HyCoSy has increasingly been used in recent years in preference to other techniques in the investigation of tubal patency. HyCoSy also allows ultrasound examination of the other pelvic organs and can give valuable information regarding the reproductive organs.