Kojima Y
Department of Anesthesiology and Resuscitology, Shinshu University School of Medicine, Matsumoto.
Masui. 1995 Dec;44(12):1667-70.
Exposure to low concentrations of anesthetics is still an important medical concern. We measured halothane concentrations in air inspired by anesthesiologists practicing inhalational anesthesia through face masks (10 cases, 200 sampling points). Halothane concentrations were 0 to 15 ppm (mean 4.89 ppm), higher than the safety level recommended by National Institute for Occupational Safety and Health (NISOH). However, these concentrations were clearly low in a room air-conditioned with vertical laminar flow providing total air exchange rate of 30 per hour (0.55 +/- 0.53 ppm, n = 40) compared to those in the rooms with horizontal laminar flow of 25 (5.98 +/- 3.80 ppm, n = 80, P < 0.001). These observations indicate the importance of ventilation systems of operating rooms for avoiding anesthetic gas exposure to anesthesiologists during inhalational anesthesia through face masks.
接触低浓度麻醉剂仍是一个重要的医学问题。我们测量了通过面罩进行吸入麻醉的麻醉医生吸入空气中的氟烷浓度（10例，200个采样点）。氟烷浓度为0至15 ppm（平均4.89 ppm），高于美国国家职业安全与健康研究所（NISOH）推荐的安全水平。然而，与每小时总换气次数为25次的水平层流房间相比，在每小时总换气次数为30次的垂直层流空调房间中，这些浓度明显较低（0.55±0.53 ppm，n = 40）（5.98±3.80 ppm，n = 80，P < 0.001）。这些观察结果表明，在通过面罩进行吸入麻醉期间，手术室通风系统对于避免麻醉气体暴露于麻醉医生的重要性。
