《ScvO2的临床意义ppt课件.ppt》由会员分享，可在线阅读，更多相关《ScvO2的临床意义ppt课件.ppt（82页珍藏版）》请在金锄头文库上搜索。
1、 ScvOz的临床意义ESyO2与ScvO2E人5沥ArterialOxygen,一ContentVenousOxygenDelvery/(=Sa0j100%.20volw%=20miidlEVenous0n-刘r-源:(命s_vo=)oxygen5LImin75%Delivery15volb6寺5madlOXygen“25%Extraction5vo4=5mtd1000mlmin250mmin750mlmin(0,Demand)1000mmin250milmin8DO2=CaO2XCO团=(1.34关SaO2XHb+0.0031XPaO2)XCO1二L34XS亏2XbXC【d阜|搪环日VO2
2、=(CaO2-CvO2)XCO团=(SaO2-SyO2)X1.34XHbXCOSyO2=Sa02-VO2/(1.34XHbXCO)(Fick方程)EO2=VO2/DO2EO2=(SaO2-SyO2)/SaO2鱼当SaO2=100%时:EO2=1-SvO2E颂26人w。各组织EO2不同,其相应之静脉氧饱和度不同D沥晓28仁OoaenEconumplen|-sneecenEOoaedetvey骆000220250aDounninSvO2降低或增加园b一5肌c牛voz|D021D021圆co|ss沥s李沥浩口0Hb页贾江人)ESa021Ed(氧疗)Vvo21Table1LimitsofmixedVenous0xygensaturationSVO275伟NormalextractionOusupply0。demand75%SVO。50%5“CompensatoryextractionIncreasingO2demandordecreasingO、upp_)50%5SvO230%“ExhaustionofextractionBeginningoflacticacidosisOusupplySvO225元“SeverelacticacidosisSVOu25%CellulardeathPinskyMR,ManceboJ,Appliedphysiologyinintensivecare
