1. JAMIA MILLIA ISLAMIA
CENTRE OF PHYSIOTHERAPYAND REHABILITATION SCIENCES
TOPIC – PFT INTERPRETATION
PHYSIOTHERAPY IN CARDIOPULMONARY CONDITIONS (402)
SUBMITTED TO: DR. JAMALALI 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
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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
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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.
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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
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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
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7. • Forced expiratory volume in 1 second: (FEV1)
– 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
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12. Acceptability Criteria
• Good start of test
• No coughing
• No variable flow
• No early termination
• Reproducibility
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13. References
1. Miller MR, Crapo R, Hankinson J, et al. General
considerations for lung function testing. Eur
Respir J 2005
2. Wanger J, Clausen JL, Coates A, et al.
Standardisation of the measurement of lung
volumes. Eur Respir J 2005;
3. American Thoracic Society. Lung Function
Testing: Selection of Reference Values and
Interpretative Strategies. Am Rev Respir Dis
1991
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