Laparoscopic Cholecystectomy. Instructions in proper trocar insertion technique. Four trocars are necessary to perform a laparoscopic cholecystectomy. Minimally Invasive Techniques have revolutionized the practice of surgery. Patients in many instances no longer need be exposed to more dangerous open procedures that require additional time to heal, increased pain, and at times additional complications. This type of surgery is usually reserved for the more affluent, but the surgeons and administrators at St. Juan de Dios Hospital are committed to providing the best care to all members of their community, regardless of economic status.