Conclusion The study suggest that selecting quality electric drill, using higher rotate speed, shorting time of expose to drill noise and medication can obviously reduce the possibility and severity of sensorineural deafness in middle ear and mastoid surgery. 结论选用性能良好的电钻、尽量使用高转速、缩短电钻使用时间以及电钻噪声暴露后及时给予药物干预治疗可以显著的减轻术后感音神经性聋发生的可能性和严重程度。