呼吸功能檢查Respiratoryfunction課件

1、Respiratory functionventilationGas exchangeAirway（patency)Respiratory muscleAir volumeEffective capillary bedAirway pressure gradientRespiratory Function TestSpirolmetryAirway resistance & complianceDiffusion capacity measure COExercise respiratory function testSpirometry TermsVC (vital capacity) TV

2、 (tidal volume)FEV1(1st second forced expiratory volume)ERV (expiratory reserve volume)IRV (inspiratory reserve volume)IC (inspiratory capacity)Static parametersTLC (total lung capacity)RV (residual volune)FRC (functional residual capacity)Forced expiratory valuesTime lung function / time-volume cur

3、veexpirationinspirationNormalDecreased overall flowsDecreased flow at high volumesDecreased flow with normal flow-volume relationshipJ:Technical or methodBody pletgtsnigraph for the measurement MVV(maximal minute ventilation) =FEV1* 35VE( minute ventilation) = TV* RR(respiratory rate)Respiratory fun

4、ction abnormality:Obstructive: FEV170%FVC; MVV 80%pred seen in obstructive pulmonary diseases(COPD) & asthmaCriteria for quantitating degree of obstructionLimitative: VC 80%pred, MVV pleural, chest wall, intestinal lung disordersCO diffusing capacityDlco = VcoPAco Pcco_Diffusion abnormality: Intestinal lung diseasePulmonary edemaPulmonaary vascular disordersBlood gas analysisExercise lung functionMaximal volume/ minite volunes