Unverified88% confidenceDecision RuleTime unknown
腕式（PPG光电式）血氧仪在低灌注、寒冷或体动情况下误差大于指夹式，若要求医疗级参考精度应认准通过NMPA二类医疗器械注册（有'械'字号）而非'消'字号或仅CE的健康手环
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88%
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Unverified优先选择通过医疗器械二类注册认证（NMPA械字号）的血压手表，仅有充气式气泵结构（示波法）的手表精度才接近上臂式血压计，光学PPG推算血压的产品仅供趋势参考75% similarUnverified指夹式血氧仪对低灌注（末梢循环差）人群测量不准，如果患者有雷诺综合征、休克、低血压或手指冰凉，应选带PI值（灌注指数）显示的机型，PI＜0.4时读数不可信75% similarUnverified不适合需要医疗级精度的临床诊断场景，家用指夹式血氧仪属于日常参考级别，不能替代医院专业监护设备75% similarUnverified指夹式血氧仪对低灌注（末梢循环差）人群测量不准，糖尿病、雷诺氏综合征、手脚冰凉者应选带'低灌注指数PI显示'或医用级抗低灌注算法的机型75% similarUnverified采用光学PPG传感器监测血氧和心率，属于消费级光学监测方案，在测量精度和稳定性上不及医用指夹式血氧仪，但优势是无需贴片、佩戴相对无创74% similar
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