Mapleson W W, Willis B A, Williams B
Br J Anaesth. 1980 Nov;52(11):1061-70. doi: 10.1093/bja/52.11.1061.
If a small bubble gas is equilibrated with a volume of blood the partial pressures of the components of the bubble after equilibration approximate to the original tensions in the blood. A method is described in which the bubble is analysed by a respiratory mass spectrometer connected to a mini-computer. The normal respiratory monitoring function of the mass spectrometer need be interrupted for only 20 s for each sample and the complete equilibration and analysis procedure takes only 3 min. Theoretical studies, experimental tests and records of experimental usage show that, in a subject anaesthetized with halothane in nitrous and oxygen, tension can be measured with an overall SD of 5% for carbon dioxide and halothane and, certain reservations, an SD of about 3% for nitrous oxide.
如果一个小气泡气体与一定体积的血液达到平衡，平衡后气泡各成分的分压近似于血液中的原始张力。本文描述了一种方法，即通过连接到微型计算机的呼吸质谱仪对气泡进行分析。每次样本分析时，质谱仪的正常呼吸监测功能只需中断20秒，整个平衡和分析过程仅需3分钟。理论研究、实验测试和实验使用记录表明，在以氟烷、一氧化二氮和氧气麻醉的受试者中，二氧化碳和氟烷张力的测量总体标准差为5%，在某些保留条件下，一氧化二氮的标准差约为3%。
