Liver resection. A comparison using the Nd-YAG laser, an ultrasonic surgical aspirator, or blunt dissection.

Before gaining wide acceptance, possible surgical tools should be compared with the standard ones. This study, therefore, compared the Nd-YAG laser and the CUSA with the standard blunt dissection technique for liver resection in 24 dogs (8 in each group). Using a noncontact technique, the Nd-YAG laser was used for cutting as well as coagulation. The Nd-YAG laser or the CUSA reduced the resection time, with the laser being the faster of the two, and was accompanied by a probable but not significant decrease in perioperative blood loss. The CUSA delineated the blood vessels and bile ducts and gave superior control. It also caused significantly less tissue damage on light and electron microscopic examination than the other two methods. Cultures taken 1 week after operation showed that the risk of bacterial infection correlated well with the extent of tissue necrosis and was significantly greater after use of the Nd-YAG laser than after use of the CUSA. The numbers of animals are small and the conclusions should be tempered by caution, but it appears that the CUSA, but not the Nd-YAG laser, may improve the results of elective liver resection.