During the procedure, the doctor enters the abdominal cavity through a small, buttonhole-sized opening on the abdomen. An optic equipped with a camera system is introduced through the incision made at the navel, and the resulting image can be viewed on a high-resolution monitor. Because of orientation in the abdominal cavity, the abdomen is filled with CO2 (carbon dioxide) gas, so the abdominal organs become clearly visible. The surgeon does not insert his hand into the abdominal cavity, but uses long, thin medical device (manipulator) instead. The procedure is very safe and not stressful for the patient. This type of surgery is used for the removal of myomas, for the solution of formulas in the ovaries, and during hysterectomy. In fact, certain surgical oncology procedures (extended hysterectomy and pelvic lymph node removal) are also performed with this procedure. Preserving the integrity of the abdominal wall ensures that the patient can go home the next day and live his normal life.