Study Design. Simulated discectomy was performed using 1) headlamp/loupes, 2) the operatie microscope, or 3) neither; and bacterial shedding was assessed using air sampler/settle plate techniques.

• 试验的设计：在以下3种方法下进行模拟椎间盘切除术：1）头灯/放大镜2）手术显微镜或3）不使用前两者然后用空气样本/下沉平板技术评估细菌脱落。