Abstract
Application of human factors concepts to high-risk activities has facilitated reduction in human error. With introduction of laparoscopic cholecystectomy, the incidence of bile duct injury increased. Seeking ideas for prevention, we analyzed 300 laparoscopic bile duct injuries within the framework of human error analysis. The primary cause of error (97%) was a visual perceptual illusion. The laparoscopic environment contributed to 75% of injuries, poor visibility 22%. Most injuries involved deliberate major bile duct transection due to misperception of the anatomy. This illusion was so compelling that the surgeon usually did not recognize it. Even when irregular cues were detected, improper rules were employed, eliminating feedback. Since the complication-causing error occurred at few key steps during laparoscopic cholecystectomy; we instituted focused training to heighten vigilance, and have formulated specific rules to decrease the incidence of bile duct injury. In addition, factors in the laparoscopic environment contributing to this illusion are discussed.
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