Fisher J A, Martire T, Volgyesi G A
Department of Anaesthesia, Mount Sinai Hospital, Toronto, Ontario.
Can J Anaesth. 1996 Feb;43(2):179-83. doi: 10.1007/BF03011260.
Valid routine testing of pulse oximeters and their sensors is problematic. A suitable testing device must not only generate the pulsatile signal the pulse oximeter requires for its operation, but must possess light absorption characteristics similar to those of living tissue. A new device called Pulse Oximeter Tester (POT) has recently become available which, it is claimed, addresses these problems.
To evaluate the POT as a suitable stimulus for pulse oximeters.
We tested all the pulse oximeters and their sensors with a set of POTs simulating blood oxygen saturation of 80%, 90% and 100%. The tests were performed at simulated heart rates of 30, 75 and 110 bpm.
The SpO2 readings (mean +/- SD) obtained with the 80%, 90% and 100% POTs were 80.7 +/- 1.3%, 90.3 +/- 0.9% and 100 +/- 0.0% respectively. There were no significant differences in readings obtained at the different simulated heart rates. Two pulse oximeters gave readings that deviated more than 2 SD from the mean. Their sensors were subsequently found to be defective.
POTs provide suitable stimuli for testing pulse oximeters. In our study sample they were found to be highly specific, but of unknown sensitivity.
脉搏血氧仪及其传感器的有效常规测试存在问题。合适的测试设备不仅必须产生脉搏血氧仪运行所需的脉动信号，而且必须具有与活体组织相似的光吸收特性。一种名为脉搏血氧仪测试仪（POT）的新设备最近面市，据称它解决了这些问题。
评估POT作为脉搏血氧仪合适刺激源的性能。
我们使用一组模拟血氧饱和度为80%、90%和100%的POT对所有脉搏血氧仪及其传感器进行测试。测试在模拟心率为30、75和110次/分钟的条件下进行。
使用80%、90%和100%的POT获得的SpO2读数（平均值±标准差）分别为80.7±1.3%、90.3±0.9%和100±0.0%。在不同模拟心率下获得的读数无显著差异。两台脉搏血氧仪的读数与平均值的偏差超过2个标准差。随后发现它们的传感器有缺陷。
POT为测试脉搏血氧仪提供了合适的刺激源。在我们的研究样本中，发现它们具有高度特异性，但灵敏度未知。
