英文版肺功能检查PPT.ppt

Grading Classification of Ventilation Function in COPD (bronchial dilator used) level FEV1/FVC FEV%Pred I ≤70% ≥80% II ≤70% 50%≤FEV%Pred ≤ 80% III ≤70% 30%≤FEV%Pred＜50% IV ≤70% ＜30% or＜50%,chronic respiratory failure PEF (peak expiratory flow) The maximal flow during a forceful expiration. PEF should be measured in the morning, afternoon and before sleeping. PEFR= （PEFmaximum-PEFminimum) ×2 PEFmaximum+PEFminimum PEF help to evaluate the chage of airway resistance. ×100% Classification of ventilation dysfunction Obstructive ventilation dysfunction Restrictive ventilation dysfunction Mixed ventilation dysfunction Characteristics of ventilation dysfunction obstructive restrictive mixed Lung capacity VC N or↓ ↓ ↓ ↓ FRC ↑ ↑ ↓ ↓ unsure TLC N or↑ ↓ ↓ unsure RV/TLC ↑ unsure unsure obstructive restrictive mixed FEV1 ↓ ↓ ↓ ↓ ↓ FEV1/FVC ↓ ↓ N or↑ N or↓ MVV ↓ ↓ ↓ ↓ ↓ MMEF ↓ ↓ ↓ ↓ ↓ Characteristics of ventilation dysfunction Pulmonary Function Testing Respiratory Department of the Second Affiliated Hospital of Guangzhou Medical University Huaxing Huang History of pulmonary function testing More than 300 years, water sealed spirometer — wedged-typed spirometer — drum-typed spirometer — digitalized spirometer In 1679,BORELLI measured lung volume firstly. In 1846,HUTCHINSON put forward the concept of vital capacity. In 1919,NIANSTROHL put forward the concept of forced vital capacity. In 1967,DOLLFUSS put forward the concept of disease of small airway. In 1979,ATS setup the work standards of pulmonary function testing. Clinical Pratice of Pulmonary Function Testing Diagnostic Objective Assessment Monitoring Evaluations for Disability / Impairment Curve of lung capacity IRV ERV VT V C RV TLC I C FR C Vital capacity The?maximum?volume?of?air?that?can?be inspired?by?forceful?expiration. Residual volume Inspiratory reserve volume ?Expiratory reserve capacity Total lung ca