空气供气循环紧闭麻醉环路氧浓度变化规律研究  

Study on the changes of concentration oxygen during air closed circuit anaesthesia

作　　者：张晓群[1] 张宏金[1] 徐敏[1] 

机构地区：[1]江苏省连云港市第二人民医院,222023

出　　处：《中国医学创新》2010年第2期63-64,共2页Medical Innovation of China

摘　　要：目的探讨空气循环紧闭麻醉呼吸环路内氧浓度变化规律。方法 ASAⅠ～Ⅱ级腹部择期手术患者和健康志愿者各20例,根据供气的不同,将手术患者和志愿者相应地分为纯氧对照组和空气实验组,每组各10例;以空气替代纯氧供应,每分钟记录一次氧浓度,手术患者环路内最低浓度不低于25%,低于25%直到最低耐受氧浓度段试验采用健康志愿者。结果手术组和志愿者组在空气供气下氧浓度随时间延长逐渐下降,与对照组相比,有显著的统计学差异(P≤0.01)。手术实验组氧浓度与时间呈正相关(r=0.9999,t=894.381,P≤0.01),直线回归方程是y=-3.0695x+84.40;志愿者实验组氧浓度与时间也呈正相关(r=0.9899,t=28.001,P≤0.01),直线回归方程是y=-3.0967x+41.447。结论空气循环紧闭麻醉呼吸环路内氧浓度随时间延长而降低,且氧浓度与时间的变化呈直线相关。Objective To study on the changes of concentration oxygen during air circuit closed anaesthesia. Methods 40 ASh, Ⅰ - Ⅱ patients （ 20 surgical patienls, 20 volunteers ）were studied. The patients were assorted into the oxygen group and air group （ n = 10） respectively. When using air or oxygen circuit closed anaesthesia,we recoded the concentration oxygen every other one minute. When the concentration oxygen was under 25%, we continued the experiments with volunteers, and also recoded the concentration oxygen every other one minute. Results During air closed circuit anaesthesia, the concentration oxygen was fallen more fast than the control groups （P≤0. 01 ）. In patients group, the relationship between the concentration oxygen and the time can be described as a correlation equation： y = -3.0695x ＋ 84. 40 （r = 0.99, t = 894. 381 ,P≤0.01 ）. In volunteers group, the relationship between the concentration oxygen and the time can also be described as another correlation equation： y = -3.0967x ＋ 41.447 （r =0.99,t =28.001 ,P≤〈0.01）. Conclusion Under the air closed circuit anaesthesia, the concentration oxygen was fallen fast. There was the linearity correlation between the concentration oxygen and the time.

关 键 词：麻醉 氧浓度 环路 空气 

分 类 号：R614[医药卫生—麻醉学]