Simplified Laparoscopic Approach to “Second-Look” Laparotomy: A Review:

Second-look laparoscopy after laparoscopic relief of strangulated small bowel obstruction

Laparoscopy is increasingly used for the treatment of complex small bowel obstructions (SBO). Conventional treatment of strangulated bowel is segmental resection. We have used second-look laparoscopy to preserve bowel in 4 cases of strangulated SBO. Of the 17 patients with bowel obstruction treated laparoscopically 4 had ischemic bowel. The obstructions were relieved and second-look laparoscopy was performed 24 hours later. In 3 cases the bowel had largely regained its normal appearance; 1 case required resection based on persistent ischemia. An average of 20 cm of bowel was preserved per patient, and there were no complications in these 4 patients. In sum, we have shown second-look laparoscopy for strangulated SBO to be feasible, safe, and, in most cases, bowel conserving.

Acute mesenteric ischemia after cardio-pulmonary bypass surgery

Acute mesenteric ischemia (AMI) is a highly-lethal surgical emergency. Several pathophysiologic events (arterial obstruction, venous thrombosis and diffuse vasospasm) lead to a sudden decrease in mesenteric blood flow. Ischemia/reperfusion syndrome of the intestine is responsible for systemic abnormalities, leading to multi-organ failure and death. Early diagnosis is difficult because the clinical presentation is subtle, and the biological and radiological diagnostic tools lack sensitivity and specificity. Therapeutic options vary from conservative resuscitation, medical treatment, endovascular techniques and surgical resection and revascularization. A high index of suspicion is required for diagnosis, and prompt treatment is the only hope of reducing the mortality rate. Studies are in progress to provide more accurate diagnostic tools for early diagnosis. AMI can complicate the post-operative course of patients following cardio-pulmonary bypass (CPB). Several factors contribute to the systemic hypo-perfusion state, which is the most frequent pathophysiologic event. In this particular setting, the clinical presentation of AMI can be misleading, while the laboratory and radiological diagnostic tests often produce inconclusive results. The management strategies are controversial, but early treatment is critical for saving lives. Based on the experience of our team, we consider prompt exploratory laparotomy, irrespective of the results of the diagnostic tests, is the only way to provide objective assessment and adequate treatment, leading to dramatic reduction in the mortality rate.

Laparoscopic Diagnostics of Acute Bowel Ischemia Using Ultraviolet Light and Fluorescein Dye: An Experimental Study

PURPOSE

The aim of the study was to show the diagnostic potential of laparoscopy using fluorescein dye and ultraviolet light in acute bowel ischemia.

MATERIALS AND METHODS

The study involved 12 domestic pigs. Under general anesthesia, the peripheral branch of the superior mesenteric artery was embolized using polyvinyl-alcohol microparticles. Two hours after the embolization, optical filters were placed into the laparoscopic set to produce ultraviolet light. Fluorescein dye was given intravenously, and the bowel was inspected. Clips were placed on the border of the ischemia that was visualized with fluorescein. Resection of the ischemic part of the bowel and anastomosis of the viable parts were carried out using laparoscopic linear cutting staplers. After 24 hours, a laparoscopic second-look procedure was carried out to verify the viability of the anastomosis.

RESULTS

The method was in all cases able to recognize intestinal ischemia and reliably differentiate ischemic bowel segments from viable bowel. Microscopic analysis of the ischemic specimens showed beginning ischemic changes of the bowel tissues.

CONCLUSIONS

The method should be considered a valuable diagnostic procedure both for diagnostics of early stage of acute bowel ischemia and for second-look procedures.