文档介绍：ObjectivesWhat’sanABG? UnderstandingAcid/BaseRelationship GeneralapproachtoABGInterpretation ClinicalcausesAbnormalABG’s Casestudies TakehomeWhatisanABGArterialBloodGasDrawnfromartery-radial,brachial,-baseabnormalitiesWhatIsAnABG?pH [H+]PCO2PartialpressureCO2PO2PartialpressureO2HCO3BicarbonateBE BaseexcessSaO2 OxygenSaturationAcid/BaseRelationshipThisrelationshipiscriticalforhomeostasis SignificantdeviationsfromnormalpHrangesare poorlytoleratedandmaybelifethreatening ,tachycardic,’sShowPaCO2wellbelownl,pHabovenl,,tachycardic,’sShowPaCO2veryhigh, NaHCO3 Carbonicacid basebicarbonateThesebuffersarelinkedtotherespiratoryand ponentfunctionofthelungsCarbonicacidH2CO3Approximately98%normalmetabolitesareintheform ofCO2CO2+H2OponentFunctionofthekidneysbasebicarbonateNaHCO3ProcessofkidneysexcretingH+intotheurineandreabsorbing HCO3-intothebloodfromtherenaltubules 1)activeexchangeNa+forH+betweenthetubular cellsandglomerularfiltrate 2)elerates hydration/dehydrationCO2inrenalepithelialcellsH2O+CO2H2CO3HCO3+H+Acid/BaseRelationship