Barton F, Nunn J F
Br J Anaesth. 1975 Mar;47(3):346-9. doi: 10.1093/bja/47.3.346.
We have described a technique by which a portable interference refractometer may be used to determine the accumulation of nitrogen in a totally closed anaesthetic circuit. The inspired mixture contained halothane, oxygen, nitrous oxide and nitrogen. The concentrations of the first two were controlled with u.v. paramagnetic analysers respectively. It was then possible to determine the percentage of nitrous oxide replaced by nitrogen by measuring the refractive power of the mixture.
我们已经描述了一种技术，通过该技术可使用便携式干涉折射仪来测定完全封闭麻醉回路中氮气的积聚情况。吸入的混合气体包含氟烷、氧气、氧化亚氮和氮气。前两种气体的浓度分别通过紫外线顺磁分析仪进行控制。然后，通过测量混合气体的折光率，就有可能确定被氮气取代的氧化亚氮的百分比。
