用 Mapleson A（麦吉尔）、环路系统或 Mapleson D 系统进行 8 次深呼吸，预充氧 60 秒。

Preoxygenation by 8 deep breaths in 60 seconds using the Mapleson A (Magill), the circle system, or the Mapleson D system.

机构信息

Department of Anesthesiology, American University of Beirut Medical Center, Beirut, Lebanon.

出版信息

J Clin Anesth. 2009 Dec;21(8):574-8. doi: 10.1016/j.jclinane.2009.01.013.

DOI:10.1016/j.jclinane.2009.01.013

PMID:20122589

Abstract

STUDY OBJECTIVE

To investigate the efficacy of preoxygenation by eight deep breaths in 60 seconds with the Mapleson A (Magill) system, the circle anesthesia system, or the Mapleson D system at an oxygen flow of 5 L/min or 10 L/min.

DESIGN

Randomized, clinical study.

SETTING

Operating room of a university hospital.

SUBJECTS

10 healthy volunteers.

INTERVENTIONS

Volunteers underwent 6 preoxygenation trials consisting of 8 deep breaths in 60 seconds using the Mapleson A, Mapleson D, and the circle anesthesia systems at an oxygen flow of 5 L/min and 10 L/min.

MEASUREMENTS

Fractional end-tidal oxygen concentration (F(ET)O(2)) was measured at 15-second intervals during preoxygenation.

RESULTS

At an oxygen flow of 10 L/min, mean F(ET)O(2) values at 60 seconds of preoxygenation were comparable among the Mapleson A, Mapleson D, and the circle anesthesia systems (87 +/- 2.1%, 87 +/- 1.6%, 87 +/- 1.6%, respectively). Using an oxygen flow of 5 L/min, mean F(ET)O(2) values at 60 seconds were similar among the Mapleson A, Mapleson D, and circle anesthesia systems (74 +/- 4.1%, 75 +/- 2.6%, 74 +/- 4.4%, respectively); however, they were significantly lower than the corresponding values achieved at an oxygen flow of 10 L/min.

CONCLUSIONS

The 8-deep-breaths in 60 seconds technique at an oxygen flow of 10 L/min can achieve adequate preoxygenation with the Mapleson A (Magill), Mapleson D, and circle anesthesia systems. Suboptimal preoxygenation is obtained with the three systems when the oxygen flow used is 5 L/min.

摘要

研究目的

研究在 5L/min 和 10L/min 的氧流量下，使用 Mapleson A（Magill）系统、圆形麻醉系统或 Mapleson D 系统进行 60 秒 8 次深呼吸预充氧的效果。

设计

随机、临床研究。

地点

一所大学医院的手术室。

对象

10 名健康志愿者。

干预措施

志愿者接受了 6 次预充氧试验，每次试验均使用 Mapleson A、Mapleson D 和圆形麻醉系统，在 60 秒内进行 8 次深呼吸，氧流量分别为 5L/min 和 10L/min。

测量

在预充氧期间，每隔 15 秒测量一次呼气末氧浓度（F(ET)O(2)）。

结果

在氧流量为 10L/min 时，Mapleson A、Mapleson D 和圆形麻醉系统在预充氧 60 秒时的平均 F(ET)O(2)值相当（分别为 87±2.1%、87±1.6%、87±1.6%）。在氧流量为 5L/min 时，Mapleson A、Mapleson D 和圆形麻醉系统在预充氧 60 秒时的平均 F(ET)O(2)值相似（分别为 74±4.1%、75±2.6%、74±4.4%）；然而，它们明显低于在氧流量为 10L/min 时达到的值。