Rebreathing in the Mapleson A, C and D breathing systems with sinusoidal and exponential flow waveforms

被引：4

作者：

Cook, LB ^{[1
]}

机构：

[1] Royal Oldham Hosp, Dept Anaesthesia, Oldham OL1 2JH, England

来源：

ANAESTHESIA | 1997年 / 52卷 / 12期

关键词：

equipment; anaesthetic breathing systems;

D O I：

10.1111/j.1365-2044.1997.246-az0388.x

中图分类号：

R614 [麻醉学];

学科分类号：

100217 ;

摘要：

The degree of rebreathing in Mapleson A, C and D breathing systems for sinusoidal and exponential flow waveforms is analysed mathematically. The effects of altering the I:E ratio and of introducing an expiratory pause are investigated. The results for sinusoidal waveform closely resemble those for a square wave. Exponential flow waveforms produce results similar to triangular flow waveforms. The Mapleson A system is always the most efficient. The Mapleson C system is efficient when the I:E ratio is 1:1, becoming less efficient with longer expiration and very inefficient with an expiratory pause. The Mapleson D system becomes efficient when the expiratory pause is long.

引用

页码：1182 / 1194

页数：13

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