Transcervical CVS
Transcervical chorionic villus sampling (CVS) is a medical procedure that involves the collection of cells from the chorionic villi for genetic testing. To perform this procedure, the doctor first inserts a speculum into the vagina to gain a clear view of the cervix. Next, an antiseptic solution is used to cleanse both the vagina and cervix to ensure a sterile environment.
During the procedure, the doctor utilizes ultrasound guidance to navigate the insertion of a thin tube through the cervix towards the chorionic villi. These villi are tiny structures that attach the placenta to the uterine wall. Carefully, the doctor uses a suction device to collect cells from the chorionic villi through the tube and into a syringe. Once the cells are successfully obtained, the doctor removes the tube and speculum, concluding the procedure.
Transabdominal CVS
Transabdominal CVS is a procedure that is performed when the position of a woman’s uterus makes transcervical CVS too risky. Although slightly more complex than transcervical CVS, it is a safe alternative. The procedure begins with the healthcare provider cleansing the abdomen with an antiseptic. Some women may also receive a local anesthetic to alleviate any pain. The doctor then inserts a small needle into the abdomen, guided by ultrasound, until it reaches the uterus and the placenta. Using a gentle suction technique, the physician collects cells into a syringe. Once the syringe is removed, the area may be covered with an adhesive bandage.