Comparison of pulse oximeters: effects of vasoconstriction and venous engorgement.
Comparison of pulse oximeters: effects of vasoconstriction and venous engorgement.
复制标题
脉搏血氧计的比较：血管收缩和静脉充血的影响。
DOI：
10.1093/bja/62.4.439
复制
发表时间：
1989
影响因子：
9.8
通讯作者：
C. Hanning
中科院分区：
文献类型：
--
作者：
C. Wilkins;M. Moores;C. Hanning
在10名志愿者中检查了冷诱导的血管收缩和静脉阻塞对四种脉搏血氧仪检测诱导的低氧血症的影响。在另外三名受试者中，维持血管收缩，直到至少一种仪器未能检测到诱导的低氧血症。对于血管收缩和静脉充血，所有仪器检测低氧血症所需的时间均增加至仪器自身对照值的2至3倍（P <0.01）。仪器之间检测到的最小饱和度存在非常显著的变化（P <0.001）。在实验条件下，一种仪器未能检测到去饱和的全部程度，并且在受血管收缩影响时，比其他测试仪器更有可能完全无法检测到去饱和（P <0.05）。在存在正常脉冲信号的情况下，所有测试仪器的性能均出现显著损害。检测到的血氧饱和度降低的持续时间未受到显著影响。
The effects of cold-induced vasoconstriction and venous occlusion on the detection of induced hypoxaemia by four pulse oximeters were examined in 10 volunteers. In three further subjects vasoconstriction was maintained until at least one instrument failed to detect the induced hypoxaemia. Time taken to detect hypoxaemia was increased for all instruments to between two and three times the instrument's own control value for both vasoconstriction and venous engorgement (P less than 0.01). There was highly significant variation in detected minimum saturation between the instruments (P less than 0.001). One instrument failed to detect the full extent of desaturation under the experimental conditions and was more likely to fail completely to detect desaturation than the other test instruments when influenced by vasoconstriction (P less than 0.05). Significant impairment in the performance of all the instruments tested occurred in the presence of normal pulse signals. The duration of detected reductions in oxygen saturation was not significantly affected.