Meriläinen P T
Datex Instrumentarium Corporation, Helsinki, Finland.
J Clin Monit. 1990 Jan;6(1):65-73. doi: 10.1007/BF02832185.
The operating principles of a fast paramagnetic oxygen sensor are described in detail. Some historical background of the paramagnetic effect in oxygen measurement is given as well. This sensor measures the difference between oxygen partial pressures in two gases as an alternating pressure signal being generated by the interaction of oxygen molecules with a switched magnetic field. Factors affecting the ideal performance of the sensor are analyzed. The main sources of interference are external pressure and vibration, and asymmetry in the transfer of the pressure signal to the microphone. Finally, the advantages of clinical breath-by-breath oximetry are briefly discussed.
详细描述了快速顺磁氧传感器的工作原理。还给出了氧测量中顺磁效应的一些历史背景。该传感器测量两种气体中氧分压的差异，将其作为由氧分子与交变磁场相互作用产生的交变压力信号。分析了影响传感器理想性能的因素。主要干扰源是外部压力和振动，以及压力信号传输到麦克风时的不对称性。最后，简要讨论了临床逐次呼吸血氧测定法的优点。
