“…However, it is not easy to create an accurate PTC, because the narrower the space between urethra and puborectalis sling, the higher the fistula locates. Therefore, some new techniques, such as intraoperative laparoscopic muscle electrostimulation 5,6 and endosonography 7 , have been devised. The authors describe a new method employing perineal ultrasonography to identify the right space between the urethra and puborectalis sling, where the rectum should be pulled through.…”