麦吉尔回路中气体稳态的理论研究。

A theoretical study of gaseous homeostasis in the Magill circuit.

作者信息

Conway C M

出版信息

Br J Anaesth. 1976 May;48(5):441-5. doi: 10.1093/bja/48.5.441.

DOI:10.1093/bja/48.5.441

Abstract

Equations have been derived to determine the alveolar gas concentrations which occur when the Magill (Mapleson A) circuit is used with a low fresh gas flow. Alveolar oxygen and carbon dioxide concentrations are determined by the fresh gas flow and composition, carbon dioxide output and oxygen uptake. Gas mixing within the circuit and alterations in the inspired gas concentrations do not affect the final equilibrium. If oxygen uptake and carbon dioxide output are constant, the alveolar gas concentrations are unaffected by alterations in ventilation.

摘要

已经推导得出一些方程式，用于确定在低新鲜气流情况下使用马吉尔（Mapleson A）回路时肺泡气的浓度。肺泡氧浓度和二氧化碳浓度由新鲜气流及其成分、二氧化碳排出量和氧摄取量决定。回路内的气体混合以及吸入气体浓度的变化不会影响最终平衡。如果氧摄取量和二氧化碳排出量恒定，肺泡气浓度不会因通气变化而受到影响。