cpet心肺运动试验课件.ppt

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MITCHELLHOROWITZCardiopulmonaryExerciseTesting1

OutlineDescriptionofCPETWhoshouldandwhoshouldnotgetCPETWhentoterminateCPETExercisephysiologyDefineterms:respiratoryexchangeratio,ventilatoryequivalent,heartratereserve,breathingreserve,oxygenpulsePatternofCPETresultsCOPDvsCHF

RationaleforExerciseTestingCardiopulmonarymeasurementsobtainedatrestmaynotestimatefunctionalcapacityreliably

ClinicalExerciseTests6-minwalktestSubmaximalShuttlewalktestIncremental,maximal,symptom-limitedExercisebronchoprovocationExertionaloximetryCardiacstresstestCPET

KarlmanWasserman

CouplingofExternalVentilation

andCellularMetabolism

AdaptationsofWasserman’sGears

GeneralMechanismsofExerciseLimitationPulmonaryVentilatoryRespiratorymuscledysfunctionImpairedgasexchangeCardiovascularReducedstrokevolumeAbnormalHRresponseCirculatoryabnormalityBloodabnormalityPeripheralInactivityAtrophyNeuromusculardysfunctionReducedoxidativecapacityofskeletalmuscleMalnutritionPerceptualMotivationalEnvironmental8

WhatisCPET?Symptom-limitedexercisetestMeasureairflow,SpO2,andexpiredoxygenandcarbondioxideAllowscalculationofpeakoxygenconsumption,anaerobicthreshold9

ComponentsofIntegratedCPETSymptom-limitedECGHRMeasureexpiredgasOxygenconsumptionCO2productionMinuteventilationSpO2orPO2PerceptualresponsesBreathlessnessLegdiscomfort

ModifiedBorgCR-10Scale

IndicationsforCPETEvaluationofdyspneaDistinguishcardiacvspulmonaryvsperipherallimitationvsotherDetectionofexercise-inducedbronchoconstrictionDetectionofexertionaldesaturationPulmonaryrehabilitationExerciseintensity/prescriptionResponsetoparticipationPre-opevaluationandriskstratificationPrognosticationoflifeexpectancyDisabilitydeterminationFitnessevaluationDiagnosisAssessresponsetotherapy

MortalityinCFPatientsNixonetal;NEJM327:1785;1992.Followed109patientswithCFfor8yrsfromCPETPeakVO281%predicted:

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