The study found that emergency operations are nine times more likely to lead to such mistakes,and operating-room complications requiring a change in procedure are four times more likely.

• 研究显示，紧急手术中发生这类事故的几率是常规手术的9倍。如果在手术时发现有其他并发症而不得不调整手术程序的话，发生遗留事故的可能性是平常的4倍。