惠普47201A型耳部血氧计对碳氧血红蛋白的准确性、灵敏度及响应速度。

Accuracy sensitivity to carboxyhemoglobin, and speed of response of the Hewlett-Packard 47201A ear oximeter.

作者信息

Douglas N J, Brash H M, Wraith P K, Calverley P M, Leggett R J, McElderry L, Flenley D C

出版信息

Am Rev Respir Dis. 1979 Feb;119(2):311-3. doi: 10.1164/arrd.1979.119.2.311.

DOI:10.1164/arrd.1979.119.2.311

Abstract

We have shown that the Hewlett-Packard 47201A ear oximeter measures arterial O2 saturation within 95 per cent confidence limits of +/- 4 per cent when arterial blood saturation is more than 65 per cent, but at lower saturations the oximeter consistently provides a reading that is too low. The oximeter is sensitive to carboxyhemoglobin, progressively overestimating arterial saturation as carboxyhemoglobin concentration increases from 0 to 18 per cent. The time response is exponential, with a normal time constant of 3 sec, but this is halved in the fast mode or operation.

摘要

我们已经证明，当动脉血氧饱和度超过65%时，惠普47201A型耳部血氧计测量的动脉血氧饱和度在±4%的95%置信区间内，但在较低饱和度时，该血氧计始终提供过低的读数。该血氧计对碳氧血红蛋白敏感，随着碳氧血红蛋白浓度从0%增加到18%，会逐渐高估动脉血氧饱和度。时间响应呈指数形式，正常时间常数为3秒，但在快速模式或操作下会减半。