How Well Can Anaesthetists Discriminate Pulse Oximeter Tones?
How Well Can Anaesthetists Discriminate Pulse Oximeter Tones?
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麻醉师如何区分脉搏血氧计音调？
DOI：
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发表时间：
2005
影响因子：
1.5
通讯作者：
P. Mohacsi
中科院分区：
文献类型：
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作者：
R. Morris;P. Mohacsi
经验丰富的麻醉师通过听Datex AS3脉搏血氧仪的音调来辨别血氧饱和度的能力进行了检查。使用高保真病人模拟器记录5秒样本，并单独或成对重播。虽然通常认为较低的饱和度较低，但感知范围被大大压缩。70%饱和度的中位数感知估计值为89%，80%为93%，94%为94%。当比较成对的样本时，对于2%的差异，70%的麻醉师正确识别了差异的方向，对于大于8%的氧饱和度差异，这一比例上升到95%。差异的大小一直被低估。实际差异为20%，中位数估计为5%。结果表明，虽然定性估计氧饱和度的变化是中等可靠的，定量估计严重限制了一个妥协的感知尺度。如果孤立地依赖听觉信号，这可能会导致对严重程度的低估。非线性（音乐）音阶可能更合适，应该进行研究。通过对经验丰富的麻醉师的测试表明，大多数麻醉师可以通过听Datex AS3脉搏血氧仪音调的音调变化来检测到饱和度变化的方向，但不能检测到饱和度变化的幅度。
The ability of experienced anaesthetists to discern oxygen saturation by listening to the tones of a Datex AS3 pulse oximeter was examined. Five-second samples were recorded using a high fidelity patient simulator and replayed singly and in pairs. Whilst the lower saturations were generally recognized as lower, the perceived range was greatly compressed. Median perceived estimates for 70% saturation was 89%, for 80% was 93% and for 94% was 94%. When comparing pairs of samples, the direction of the difference was correctly discerned by 70% of anaesthetists for differences of 2%, rising to 95% for differences of greater than 8% oxygen saturation. The magnitude of the difference was consistently underestimated. With an actual difference of 20%, the median estimate was 5%. The results indicate that while qualitative estimate changes in oxygen saturation are moderately reliable, quantitative estimation is severely limited by a compromised perceived scale. This may lead to underestimation of the severity if the auditory signal is relied on in isolation. A non-linear (musical) scale may prove more appropriate and should be investigated. Testing experienced anaesthetists demonstrated that most could detect the direction, but not the magnitude of a change in saturation by listening to the change in pitch of a Datex AS3 pulse oximeter tone.