Ding Z N, Shibata K, Yamamoto K, Kobayashi T, Murakami S
Department of Anesthesiology and Intensive Care Medicine, School of Medicine, Kanazawa University, Japan.
Can J Anaesth. 1992 Jan;39(1):87-9. doi: 10.1007/BF03008681.
To observe the influence of circulatory changes on the lag time of the pulse oximeter response, eight healthy patients scheduled for hand surgery were studied. After breath holding, the patients took a breath of oxygen and the time to an increase in SpO2 was measured before and after axillary brachial plexus block. It was found that the lag time with finger probe decreased from 28.6 +/- 7.1 sec to 15.8 +/- 1.1 sec (mean +/- SD) following brachial block (P less than 0.01). There was no change in arterial blood pressure. The results suggest that the lag time of the finger pulse oximeter response is primarily determined by blood flow.
为观察循环变化对脉搏血氧饱和度仪反应延迟时间的影响，对8例计划行手部手术的健康患者进行了研究。屏气后，患者吸入氧气，并在腋路臂丛神经阻滞前后测量SpO₂升高的时间。结果发现，臂丛神经阻滞后，手指探头的延迟时间从28.6±7.1秒降至15.8±1.1秒（均值±标准差）（P<0.01）。动脉血压无变化。结果提示，手指脉搏血氧饱和度仪反应的延迟时间主要由血流决定。
