Bongard J P, Pahud C, De Haller R
Centre Antituberculeux, Hôpital Cantonal Universitaire, Geneve, Switzerland.
Eur Respir J. 1989 Mar;2(3):280-2.
The oxygen concentration (O2%) produced by 12 type A concentrators, with a working time of 28-18,099 h, and 6 type B concentrators, with a working time of 0-3,033 h, was measured over a 12 month period in the user's home, at a flow rate of 2 l.min-1. One hundred and two measurements of O2% (mean 82.9), made at least once monthly by a visiting nurse, showed that type A concentrators were usually delivering less than 92% expected O2. Four concentrators were delivering less than 40% O2 after a working time of only 4,000 h. Sixty two measurements made by the manufacturer confirmed these findings (mean 86.8). The 18 measurements performed by the nurse on the type B concentrators showed expected O2% values (mean 93.1). Our study demonstrates the necessity of regular clinical and technical surveillance, at the user's home, during long-term domiciliary oxygen therapy and the need for the manufacturer to incorporate an alarm system monitoring the O2% into oxygen concentrators.
在用户家中，以2升/分钟的流速，对12台工作时间为28 - 18099小时的A型制氧机和6台工作时间为0 - 3033小时的B型制氧机在12个月的时间里产生的氧气浓度（O2%）进行了测量。由访视护士每月至少进行一次的102次O2%测量（平均值为82.9）显示，A型制氧机通常提供的氧气量低于预期的92%。有4台制氧机在仅工作4000小时后提供的氧气量低于40%。制造商进行的62次测量证实了这些结果（平均值为86.8）。护士对B型制氧机进行的18次测量显示氧气浓度值符合预期（平均值为93.1）。我们的研究表明，在长期家庭氧疗期间，在用户家中进行定期临床和技术监测很有必要，并且制造商需要在制氧机中配备监测O2%的警报系统。
