I-EO_2在静吸复合全麻监测中的意义

The Value of Inspiratory to End Tidal Oxygen Concentration Difference during Intravenous Inhalation Combined Anesthesia

目的：探讨ＩＥＯ２在全麻监测中的意义。方法：对４１例普鲁卡因静吸复合麻醉病人术中同步持续监测ＩＥＯ２和ＥＴＣＯ２结果：ＩＥＯ２和ＥＴＣＯ２在全麻控制呼吸时均无明显变化，而在自主呼吸恢复和拔管前显著增高（Ｐ＜００５和＜００１）。控制呼吸时和自主呼吸恢复后ＥＴＣＯ２（ｘ）和ＩＥＯ２（ｙ）的直线回归分析分别为＾ｙ１（％）＝００７９（ｍｍＨｇ）＋１０１７（ｒ＝０６９３，Ｐ＜０００１）和＾ｙ２（％）＝０１２２ｘ（ｍｍＨｇ）－０４６６（ｒ＝０７２０，Ｐ＜０００１）。两回归系数比较差异有高度显著性（Ｐ＜０００１）。结论：ＩＥＯ２可做为全麻中监测通气功能的一种指标。与深麻醉控制呼吸时相比，浅麻醉自主呼吸时可能更加敏感。

Objective: To evaluate the value of inspiratory to end tidal oxygen concentration difference (I EO 2) during general anaesthesia. Methods:I EO 2 and ETCO 2 were measured synchronously in 41 patients with intravenous inhalation combined anaesthesia. Results:Neither I EO 2 nor ETCO 2 had significant changes ( P> 0 05) during controlled respiration (CR), but both of them significantly increased ( P< 0 01) as spontaneous respiration (SR) had recovered before extubation. Linear regression analysis between ETCO 2(x) and I EO 2(y) showed: 1(%)=0 079x(mmHg)+1 017( r= 0 693, P< 0 001) during CR and 2 (%)=0 122x(mmHg)-0 466( r= 0 720, P< 0 001) during SR with a high regressive coefficient ( P< 0 001) during SR. Conclusion: I EO 2 may be a valuable indicator of ventilatory function during general anaesthesia. It has a greater sensitivity during SR than that with CR.