Fluorescein-assisted laparoscopy in the identification of arterial mesenteric ischemia.

Accurate identification of acute mesenteric ischemia remains a challenge. It was hypothesized that fluorescein-assisted laparoscopy (FAL) may have a role in the identification of acute arterial mesenteric ischemia. Arterial ischemic small-bowel segments were prepared in 11 dogs. Following 2.5 h of ischemia, laparoscopy was performed with a standard light source followed by FAL with an argon laser. These two techniques were immediately compared with open inspection. Standard laparoscopy correctly identified 10 ischemic segments. FAL correctly identified 9 ischemic segments and the combination of the 2 techniques allowed laparoscopy to correctly identify all 11 ischemic segments. Standard laparotomy with and without fluorescein correctly identified 10 ischemic segments. The difference between laparoscopy and laparotomy was not significant (P > 0.6, Fisher's exact test). The combination of laparoscopic evaluation with and without fluorescein allowed identification of small-bowel ischemia in all subjects in this canine model. Further studies are warranted to delineate the accuracy of laparoscopy in other patterns of mesenteric insufficiency before clinical application.