
TEM uses instruments that are specially designed so the procedure can be performed through the anus and in the rectum. An operating proctoscope (a 2 inch wide tube) is placed through the anus and positioned over the lesion. The rectum is filled with carbon dioxide gas, so there is room to work. A special microscope is used to look at the area directly and with a video camera. Long instruments are then used to grasp, cut, and suture. As a result, there is less pain, and recovery time is much faster.