Unverified85% confidenceDecision RuleTime unknown
PI灌注指数功能对末梢循环差的人群（老人、糖尿病患者、低温环境）至关重要，PI<0.4时普通血氧仪读数极不稳定，应选具备PI显示并支持低灌注模式的机型
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
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Unverified灌注指数（PI值）显示功能很关键，PI<0.3时血氧读数不可靠，老年人、循环差、手脚冰凉者应选带PI指示的监护仪，避免因灌注不足导致误读或读不出90% similarUnverified血氧仪精度受灌注指数(PI)影响，PI<0.4时读数可靠性大幅下降；老年人、低血压、末梢循环差者应选择带PI显示的型号，PI值可判断本次测量是否可信89% similarUnverified血氧监测的准确性受灌注指数(PI值)影响：PI＜0.3时数据不可靠，选购家用指夹式血氧仪应看是否显示PI值，无PI显示的低价产品在末梢循环差(如老人、低温)时读数漂移大85% similarUnverified关注PI灌注指数（Perfusion Index）功能：PI<0.4%时测量结果可信度低，具备PI显示的机型能提示当前读数是否可靠，末梢循环差（低血压、寒冷、老年人）的用户应优先选带PI指示的型号84% similarUnverified指夹式血氧仪的Perfusion Index(PI灌注指数)应≥1才能保证读数可靠，PI＜0.4时低灌注患者、老人、末梢循环差者会测不准或无法读数，选购时优先看是否标注支持低灌注测量83% similar
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