Unverified83% confidenceFactTime unknown
灌注指数（PI值）是判断末梢血液灌注/循环状况的关键指标，PI正常范围约0.02%-20%，选带PI显示的血氧仪比只显示SpO2的更能反映循环情况，是家用监测循环的高性价比选择
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83%
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Long-term
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Unverified支持PI灌注指数显示，可辅助判断末梢循环状况，在同价位家用血氧仪中属于功能较全的配置86% similarUnverified支持PI灌注指数显示，可辅助判断末梢血流灌注状态，在同价位国产血氧仪中功能较全面84% 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83% 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82% 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80% similar
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