Karlmark B, Ellingsen J, Englesson S
Acta Anaesthesiol Scand. 1981 Oct;25(5):430-3. doi: 10.1111/j.1399-6576.1981.tb01680.x.
A new method for gas flow measurements, based on a gas dilution technique, is described. A known amount of fresh room air is injected as a tracer gas into a carrier gas stream. The downstream concentration profile of the tracer gas is recorded with a portable mass-spectrometer. The flow rate of the carrier gas is calculated from the area under the tracer gas curve as electronically integrated. The method was tested against precision spirometers, one of the rolling seal type and one of the fluidistor type. It was shown that any rapid gas analyser might be used for the analyses, either of the tracer gas or of the carrier gas. The applicability of this method during general anaesthesia and in other clinical situations is discussed.
描述了一种基于气体稀释技术的气流测量新方法。将已知量的新鲜室内空气作为示踪气体注入载气流中。用便携式质谱仪记录示踪气体的下游浓度分布。载气的流速通过示踪气体曲线下的面积经电子积分计算得出。该方法与精密肺活量计进行了对比测试，其中一种是滚动密封式，另一种是流体变阻式。结果表明，任何快速气体分析仪都可用于示踪气体或载气的分析。讨论了该方法在全身麻醉及其他临床情况下的适用性。
