脉冲氧计中的黑色素偏差是由光源光谱带宽解释的
Andrew Bierman1, Kevin Benner2, Mark S Rea2
1Namreiba LLC, Albany, NY, USA.
British journal of anaesthesia
|March 5, 2024
概括
脉冲氧计 (SpO2) 在黑色皮肤的个体中高估了氧气水平,这是由于黑色素. 脉冲氧计中的更窄的光谱带宽可以消除这种偏差.
科学领域:
- 生物医学光学 生物医学光学
- 医疗器械技术 医疗器械技术
- 生理监测是指对身体进行生理监测.
背景情况:
- 脉冲氧计 (SpO2) 使用光学光传输非侵入性地测量血液氧和 (SaO2).
- 当前的SpO2设备表现出偏差,高估了肤色较深的人的氧气水平.
- 这种偏差归因于皮肤中的黑色素对光线吸收的差异.
研究的目的:
- 为了研究光谱带宽对脉冲氧计精度的影响.
- 为了确定黑色素度是否会影响不同光谱带宽的SpO2读数.
- 开发一种方法来减轻对不同肤色的SpO2测量中的偏差.
主要方法:
- 开发了光谱分辨率光电显微镜 (srPPG) 来分析通过指尖的光传输.
- 记录的光谱传输变化与不同的氧气水平和应用狭窄和宽的数字光谱过器.
- 量化了部分黑色素含量,并分析了它对带宽之间的SpO2读数的影响.
主要成果:
- 实验结果证实了比尔-兰伯特定律对皮肤色调较深的SPO2偏差的预测.
- 商业脉冲氧计中的发光二极管光谱有助于错误地高SpO2读数与增加的黑色素.
- 在狭窄和广的光谱带宽之间观察到SpO2读数的系统变化.
结论:
- 脉冲氧计中的黑色素偏差可以通过使用更窄的光谱带宽来消除.
- 目前的脉冲氧计设计需要修改,以提高所有肤色的精度.
- 未来的脉冲氧计开发应该优先考虑光谱特征,以确保公平的性能.
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