Pft interpretation

Pft interpretation

1. JAMIA MILLIA ISLAMIA CENTRE OF PHYSIOTHERAPY AND REHABILITATION SCIENCES TOPIC – PFT INTERPRETATION PHYSIOTHERAPY IN CARDIOPULMONARY CONDITIONS (402) SUBMITTED TO: DR. JAMAL ALI MOIZ SUBMITTED BY: AZIZA NAZNEEN BPT IV YEAR

2. Pulmonary function test Pulmonary function testing is a group of tests that provide objective data on a patient's lung function Evaluates 1 or more major aspects of the respiratory system Lung volumes Airway function Gas exchange 2

3. Indications Detect disease Evaluate extent and monitor course of disease Evaluate treatment Assess pre operative risk. Assess prognosis. Assess health status before beginning strenous activity or procedure 3

4. Contraindications Hemoptysis of unknown origin. Unstable angina pectoris. Recent MI. Thoracic aneurysm. Cerebral aneurysm. Abdominal aneurysm. Recent eye surgery. Recent abdominal and thoracic surgery. Patient with a history of syncope. 4

5. Technique Have patient seated comfortably Closed-circuit technique Place nose clip on Have patient breathe on mouthpiece Have patient take a deep breath as fast as possible Blow out as hard as they can until you tell them to stop 5

6. Terminology Forced vital capacity (FVC): Total volume of air that can be exhaled forcefully from TLC The majority of FVC can be exhaled in <3 seconds in normal people, but often is much more prolonged in obstructive diseases Measured in liters (L) Interpretation of % predicted: 80-120% Normal 70-79% Mild reduction 50%-69% Moderate reduction <50% Severe reduction 6

7. Forced expiratory volume in 1 second: (FEV 1 ) Volume of air forcefully expired from full inflation (TLC) in the first second Measured in liters (L) Normal people can exhale more than 75-80% of their FVC in the first second; thus the FEV1/FVC can be utilized to characterize lung disease Interpretation of % predicted: >75% Normal 60%-75% Mild obstruction 50-59% Moderate obstruction <49% Severe obstruction 7

8. FEV1 FVC 8

9. Categories of diseases Obstructive Restrictive Mixed 9

10. 10

11. 11

12. Acceptability Criteria Good start of test No coughing No variable flow No early termination Reproducibility 12

13. References Miller MR, Crapo R, Hankinson J, et al. General considerations for lung function testing. Eur Respir J 2005 Wanger J, Clausen JL, Coates A, et al. Standardisation of the measurement of lung volumes. Eur Respir J 2005; American Thoracic Society. Lung Function Testing: Selection of Reference Values and Interpretative Strategies. Am Rev Respir Dis 1991 13