Murthy V S, Malhotra S K, Bala I, Raghunathan M
Department of Anaesthesia, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Can J Anaesth. 1995 Jul;42(7):608-11. doi: 10.1007/BF03011878.
To study the detrimental effects of operating room noise, noise levels in operating rooms were first measured and the average noise level was calculated in Decibels, which was 77.32 dB(A). An audiocassette of 90 min duration was prepared recording the operating room noise. The same audiocassette was used later to expose the 20 anaesthesia residents to the operating room noise in the acoustically treated rooms of audiology department. The noise level during exposure was maintained at 77.32 dB(A). Two cognitive functions, mental efficiency and short-term memory were studied. The tests used were the Trail Making Test and Digit Symbol Test for mental efficiency and the Benton Visual Retention Test for short-term memory. The mean pre-exposure scores for the Trail Making Test, Digit Symbol Test and Benton Visual Retention Test were 22.9 +/- 1.94, 83 +/- 2.62 and 9.55 +/- 0.51 respectively. The mean during-exposure scores were 16.35 +/- 1.39, 74.05 +/- 3.46 and 5.8 +/- 0.41 respectively (P < 0.05). In conclusion, we observed that operating room noise reduced the mental efficiency and short-term memory of anaesthesia residents.
为研究手术室噪音的有害影响，首先测量了手术室的噪音水平，并以分贝计算平均噪音水平，为77.32 dB(A)。准备了一盘时长90分钟的录音带，记录手术室噪音。后来使用同一盘录音带，让20名麻醉住院医师在听力学科室经过声学处理的房间里暴露于手术室噪音中。暴露期间的噪音水平维持在77.32 dB(A)。研究了两项认知功能，即心理效率和短期记忆。所使用的测试分别是用于心理效率的连线测验和数字符号测验，以及用于短期记忆的本顿视觉保持测验。连线测验、数字符号测验和本顿视觉保持测验的暴露前平均分数分别为22.9±1.94、83±2.62和9.55±0.51。暴露期间的平均分数分别为16.35±1.39、74.05±3.46和5.8±0.41（P<0.05）。总之，我们观察到手术室噪音降低了麻醉住院医师的心理效率和短期记忆。
