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Gallstone Ileus: Laparoscopic-Assisted Enterolithotomy

1998, Journal of the American College of Surgeons

Although longevity in Western countries has probably increased the prevalence of gallstone ileus, 1 this disorder remains a rare, often unrecognized, cause of gastrointestinal mechanical obstruction, accountable for no more than 4% of cases. 1-3 The advanced age of the patients, the frequent concomitant presence of severe medical diseases, and the delay before surgical treatment contribute to high morbidity and mortality rates, ranging from 11 to 75% and from 8 to 20%, respectively. 2,4 Although consensus has not been reached as to the emergency surgical procedure for gallstone ileus, especially regarding the timeliness and timing of biliary surgery, 5 a simple enterolithotomy is considered to be the procedure of choice by most authors. 1,2,6 To optimize results, the operation should be expeditious and surgical trauma kept to a minimum. We use the videolaparoscopic approach, described here, in the treatment of three cases of gallstone ileus.

TECHNIQUE

A nasogastric tube and a urinary catheter are inserted before surgery. General anesthesia with endotracheal intubation and muscular relaxation is used. The patient is placed on the operating table with both arms at the side, the operating room should include two video monitors to enable comfortable inspection and flexibility in repositioning for both surgeon and assistant. 7 Abdominal distention is obtained using an optical trocar or an open technique for insufflation through the umbilicus. The perito-neal cavity is distended to a maximum pressure of 15 mm Hg. A diagnostic videolaparoscopy is performed using a 10-mm laparoscope. The patient is placed in the Trendelenburg and reversed Trendelenburg positions to facilitate exposure of the upper part of the abdomen and the pelvis.

If the diagnosis of gallstone ileus is clear, one additional trocar (5 mm) is placed under direct vision in the most conventional position (usually the lower right quadrant) to expose the obstructed section of the small intestine. Through this trocar a bowel clamp is used to secure the ileum distally to the obstructing stone. The port site is enlarged with a 3-4 cm vertical extension and the obstructed section of the small intestine is exposed. An enterotomy is performed via a longitudinal incision at the antimesenteric border and the stone is extracted. A transverse suture is made and the exposed intestinal section is placed back into the abdomen.

If the diagnosis of gallstone ileus is not clear after diagnostic laparoscopy, but the presence of an acute small bowel obstruction is confirmed, one additional trocar (5 mm) is placed, usually in the lower left quadrant. With the patient in the Trendelenburg position, the cecum and distal ileum are identified. From the ileocecal valve, a gentle manipulation of the bowel using a palpator allows the identification of the obstructing stone. The position of a third trocar is selected on the basis of the stone's position, and must be the most favorable to secure the ileum distally to the obstructing stone and to expose the obstructed section of the small intestine, enlarging the port site with a 3-4-cm vertical extension. The operation then proceeds as described in the preceding paragraph.

RESULTS

The laparoscopic-assisted technique was successfully used on three female patients, aged 87, 86, and 82, respectively. Preoperative plain abdominal radiography showed signs of small bowel obstruction in all three patients. Pneumobilia and a 4-cm radiopaque gallstone outside the biliary area were seen and the diagnosis of gallstone ileus was clear in one patient only. In this patient, diagnostic laparoscopy confirmed the presence of gallstone ileus, identifying a stone in the terminal ileum 20 cm from the ileocecal valve, and only one additional trocar was placed in the lower right quadrant to expose the obstructed section of the small intestine. In the remaining two patients, the cause of obstruction was not clear and placement of two additional trocars was necessary to identify the obstructing stone, 25 cm from the ileocecal valve and in the proximal ileum, respectively. In both patients, the second trocar was placed in the lower left quadrant. To secure and expose the obstructed section of the small intestine, the third trocar was placed in the right lower quadrant and in the upper left quadrant, respectively. In all three patients, a cholesterinic, oval-shaped stone was found. Postoperatively, no mortality, suture leak, or wound infection occurred. The procedure was accomplished in under 1 hour. Two patients had a bowel movement on day 2, the third on day 3. Oral intake began on day 3 and discharge was on day 7 for all three patients. Six months postoperatively the patients had no complaints. No additional biliary surgery is planned for these patients.

DISCUSSION

The high morbidity and mortality rate associated with surgical treatment of gallstone ileus justifies the use of videolaparoscopy, with the aim of minimizing the surgical trauma to the patient. 8 In the presence of bowel obstruction, care must be taken in producing pneumoperitoneum. We emphasize the necessity for an optical trocar or an open technique for insufflation to minimize the risk of intestinal injuries. For the same reason, laparoscopic manipulation of the bowel should start from the ileocecal valve, so as to have a nondistended ileum, because the dilated ileum is prone to perforation and could be inadvertently torn by the clamps. We believe, differently from Montgomery, 8 that it is not possible to standardize the surgeon's position and the placing of additional trocars during laparoscopic-assisted surgery. The surgeon must be comfortable: the operating position depends on the site of the stone and on the level of obstruction and may change during an individual operation. Some authors have stressed the importance of palpating the entire bowel during surgery, searching for additional stones, which could be the cause of a recurrent gallstone ileus. 4 Multiple stones in the intestine have been found in 3 to 15% of these patients, especially when the stone's shape is faceted or cylindrical. 2,4,8 In the presence of this kind of stone, it is necessary to enlarge the minilaparotomy to permit the manual exploration of the intestine. If an oval stone is found, the risk of a recurrent gallstone ileus is very low, and the latter maneuver can be avoided. In our experience, the mini-invasive approach is useful for both diagnosis and treatment of obstruction. The operation is of short duration and does not require advanced laparoscopic skills. During surgery blood and fluid loss is minimal. The wellexposed ileus can be securely sutured. The advantages of mini-invasive surgery will increase the number of cases of gallstone ileus managed laparoscopically.