上海交通大学：《诊断学》课程PPT教学课件（英语版）Chapter 30 Respiratory function

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

LITERS FEV FVC SPIROMETER 1.0 PEN SECONDS igure I. Measurement of forced expirator ory volume (FEv, and vit capcity(FVC)

APACITY LEVEL INSPIRATORY RESERVE VOLUME INSPIRATORY (IRV CAPACITY VITAL (IC) CAPACITY VC) INCR STING EXPIRATORY LEVEL EXPIRATORY RESERVE VOLUME FUNCTIONAL (ERV) RESIDUAL CAPACITY (FRC) RESIDUAL VOLUME LEVEL Figure 3-1. Lung Volumes and Capacities. See text for description. 288:49AH

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

FEFMAX FEF Inspiration FEF 一FEF75% FLOW LISEC expiration

expiration inspiration

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