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Review age, gender, smoking status, BMI, indication, flow-volume curves. Quality control. Three acceptable maneuvers with repeatable values: Two highest values of FVC and FEV1 should be within 150mL (100mL if FVC ≤ 1L)
Describe the clinical indications for pulmonary function testing. Understand the physiology of the core pulmonary function tests: spirometry, lung volumes and DLCO. Apply an organized approach to interpreting pulmonary function tests.
SPIROMETRY IMPLEMENTATION QUICK GLANCE GUIDE. Spirometry: A measure of airflow (how fast) and volume (how much) Forced Vital Capacity (FVC): The volume delivered during an expiration made as forcefully and completely as possible starting from full inspiration.
If FVC < LLN (or < 80%) predicted, consider hyperinflation/gas trapping. If post-BD FVC remains < LLN (or < 80%) predicted, consider combined obstructive and restrictive defect and full PFT. Note: Recommended reference equations: GLI, CHMS, and NHANES III. 2018 Ontario Lung Association.
What is spirometry? ‘Method of assessing lung function by measuring the volume of air that the patient is able to expel from the lungs after a maximal inspiration’ (NICE 2004) Differentiates - obstructive/restrictive disorders. Most effective way of determining severity (not signs/symptoms alone) MRC dyspnoea scale/QOL. Training.
Lung function tests can be used to: Compare your lung function with known standards that show how well your lungs should be working. Measure the effect of chronic diseases like asthma, chronic obstructive lung disease (COPD), or cystic fibrosis on lung function. Identify early changes in lung function that might show a need for a change in ...
Spirometry is an objective physiological test of lung function and is essential in the management of respiratory disease. A spirometer measures how much, and how quickly, air can be exhaled in a single blow from full lungs. Some spirometers also measure airflow during inspiration. Results are available immediately.
