在不同的模拟皮肤色调下进行脉冲氧计测试
Suvvi K Narayana Swamy1, Chenyang He1, Barrie R Hayes-Gill1
1Optics and Photonics Research Group and Centre for Healthcare Technologies, University of Nottingham, University Park, Nottingham, UK.
脉冲氧计 (PO) 在不同肤色的皮肤表现不同,可能会高估黑色皮肤的氧和度 (SpO2). 这项研究开发了一个测试台,在模拟条件下评估POs,揭示了设备的显著变化.
科学领域:
- 生物医学工程 生物医学工程
- 医疗器械技术 医疗器械技术
- 临床测量 临床测量
背景情况:
- 脉冲氧计 (PO) 显示了受皮肤色素影响的性能变化.
- 在POs和动脉血液气体分析之间的SpO2读数有差异,特别是在肤色较暗的个体中.
- 这可能导致隐性低氧症的危险状况,低氧和度未被检测到.
研究的目的:
- 开发和验证一个实验室测试台,用于评估商业脉冲氧计的性能.
- 在模拟不同信号强度和黑色素衰减的受控条件下评估PO性能.
- 为了研究模拟低信号和黑色素对不同设备中的SpO2测量的影响.
主要方法:
- 使用实验室模拟器生成控制的SpO2值,范围大约在70%至100%之间.
- 使用中性密度和合成黑色素过器来复制低信号条件和不同水平的黑色素.
- 测试了六种商业脉冲氧计设备 (家庭和医院),并在模拟条件下记录了它们的SpO2读数.
主要成果:
- 在不同脉冲氧计之间观察到记录的SpO2值的显著变化,当它们受到相同的模拟输入时.
- 这些差异在较低的SpO2水平 (低于80%) 最为明显,而经验数据很少.
- 在低信号和黑色素衰减下,设备响应在模拟的SpO2值中没有一致的变化.
结论:
- 开发的测试台在模拟具有挑战性的条件下突出显示了商业脉冲氧计之间的显著性能差异.
- 该研究没有提供确的证据来反驳黑色素对体内SPO2测量的影响.
- 需要在仪器校准,理论理解和脉冲氧计设计方面进行进一步的研究,以解决这些性能差异.
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