INTERPRETATION OF PULMONARY FUNCTION TESTS (PFTS)
INTERPRETATION OF PULMONARY FUNCTION TESTS (PFTS)
Anna Neumeier, MD
Assistant Professor, Department of Pulmonary Sciences and Critical Care Medicine ACP
February 2020
LEARNING OBJECTIVES
1. Describe the clinical indications for pulmonary function testing 2. Understand the physiology of the core pulmonary function tests:
spirometry, lung volumes and DLCO 3. Apply an organized approach to interpreting pulmonary function
tests 4. Identify obstructive, restrictive, mixed obstructive-restrictive and
pulmonary vascular patterns of abnormalities on pulmonary function testing.
INDICATIONS FOR PFTS
? Evaluation of patients presenting with dyspnea ? Evaluating disease severity and monitoring response to treatment ? Determine fitness for surgery
? *thoracic surgery/lung resection
PFTS: AVAILABLE MEASURES
? Spirometry
? Airflow (how much air, how fast)
? (Static) Lung volumes
? Volume (how much air)
? Diffusing Capacity/DLCO
? Gas exchange (how effective)
? Other testing:
? Airway responsiveness ? Respiratory muscle strength testing ? Compliance of the lungs
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