Unverified85% confidenceDecision RuleTime unknown
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
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
Sources
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Related Claims
Unverified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88% 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86% similarUnverifiedPI（灌注指数）显示是宠物血氧仪的关键指标：PI<0.4时读数可信度低，选带PI显示的机型可判断当前部位血流是否足够，避免因低灌注误读危险的假低值86% similarUnverified常规指夹血氧仪测量脉搏波(PI灌注指数)通常在0.2%-20%范围，PI值过低（<0.4%）说明末梢灌注差、读数可信度下降，选购时带PI显示的型号有助于判断当次测量是否可靠85% similarUnverified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85% similar
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