Respiratory function 仁济医院急诊科郑翠霞
Respiratory function 仁济医院急诊科 郑翠霞
ventilation Gas exchange Airway (patency) Air volume Respiratory Effective muscle capillary bed Airway pressure gradient
ventilation Gas exchange Airway （patency) Respiratory muscle Air volume Effective capillary bed Airway pressure gradient
Respiratory Function Test ● Spirometry e Airway resistance compliance Diffusion capacity measure co o Exercise respiratory function test
Respiratory Function Test ⚫ Spirolmetry ⚫ Airway resistance & compliance ⚫ Diffusion capacity measure CO ⚫ Exercise respiratory function test
Spirometry Terms o VC(vital capacity o TV (tidal volume) o FEvI(st second forced expiratory volume) o ERV(expiratory reserve volume o IRV (inspiratory reserve volume) o IC (inspiratory capacity
Spirometry Terms ⚫ VC (vital capacity) ⚫ TV (tidal volume) ⚫ FEV1(1st second forced expiratory volume) ⚫ ERV (expiratory reserve volume) ⚫ IRV (inspiratory reserve volume) ⚫ IC (inspiratory capacity)
Static parameters TLC (total lung capacity) ●RV( residual volune) o FRC(functional residual capacity)
Static parameters ⚫ TLC (total lung capacity) ⚫ RV (residual volune) ⚫ FRC (functional residual capacity)
Forced expiratory values Time lung function /time-volume curve
Forced expiratory values Time lung function / time-volume curve
a Normal DECREASED OVERALL FLowS 三2=B若=E b. Decreased overall flows A B c Decreased flow DECREASED at high volumes FLOW AT HIGH VOLUMES DECREASED FLDA NORMAL FLON RELA TION d Decreased flow with normal D flo OW-vOlume relationship
a. Normal b. Decreased overall flows c. Decreased flow at high volumes d. Decreased flow with normal flow-volume relationship
MVV(maximal minute ventilation)=FEV1*35 VE( minute ventilation)=TV*RR(respiratory rate
MVV(maximal minute ventilation) =FEV1* 35 VE( minute ventilation) = TV* RR(respiratory rate)
Respiratory function abnormality Obstructive: FEVI<70%FVC MVV< 80%pred seen in obstructive pulmonary diseases( copd)& asthma
Respiratory function abnormality: •Obstructive: FEV1<70%FVC; MVV< 80%pred seen in obstructive pulmonary diseases(COPD) & asthma
Limitative VC< 80%pred, MVV pleural, chest wall, intestinal lung disorders
Limitative: •VC< 80%pred, MVV • pleural, chest wall, intestinal lung disorders