Bucher H U, Keel M, Wolf M, von Siebenthal K, Duc G
Department of Obstetrics and Gynaecology, University Hospital, Zurich, Switzerland.
Lancet. 1994 May 7;343(8906):1135-6. doi: 10.1016/s0140-6736(94)90238-0.
Two sources of artifactual pulse-oximetry estimation were investigated in 20 neonates. Increased pressure on tissue due to inappropriate sensor fixation was mimicked with a blood pressure cuff. The error in arterial oxygen saturation (pSO2) exceeded 2 SD (> 3%) in 25% subjects at 50 mm Hg which in an ancillary experiment was produced by 11 of 26 nurses fixing the sensor. Venous congestion at 30 and 40 mm Hg permitted normal detection of pulse rate but induced errors in pSO2 over 2 SD in 15% and 30% of subjects, respectively. Pulse-oximeter values need to be scrutinised for these common errors.
在20名新生儿中研究了两种导致脉搏血氧饱和度估算出现假象的来源。使用血压袖带模拟因传感器固定不当导致的对组织压力增加。在50毫米汞柱时，25%的受试者动脉血氧饱和度（pSO2）误差超过2个标准差（>3%），在一项辅助实验中，26名护士中有11名固定传感器时会产生这种情况。30和40毫米汞柱时的静脉充血允许正常检测脉搏率，但分别在15%和30%的受试者中导致pSO2误差超过2个标准差。对于这些常见误差，需要仔细检查脉搏血氧仪的值。
