(14) DSA | Pulmonary Function Tests (Karius) Flashcards
When interpreting pulmonary function tests, one should first try…
To determine the pattern of abnormality
What are the patterns of abnormality in a pulmonary function test?
Obstructive
Restrictive
Normal
What is FEV1 ?
Forced expiratory Volume in one second
What is FVC?
Forced vital capacity
What does a low FEV1/FVC ratio indicate?
OBSTRUCTIVE PATTERN
What does a normal FEV1/FVC ratio indicate?
Restrictive/Normal Pattern
If the FEV1/FVC ratio is normal;
Low forced vital capacity =?
Normal value=?
Low forced vital capacity =Restrictive pattern
Normal value= Normal value
What are the indications for pulmonary functions testing?
- Evaluate symptoms and signs of lung disease
- Assess progression of lung disease
- Monitor effectiveness of therapy
- Screen people at risk of pulmonary disease
- Monitor for potentially toxic effects of certain drugs
What is the major limitation of pulmonary function tests?
How they are interpreted
*HIGH YIELD*
What are the 3 most important measures in a spirogram?
- Forced Vital Capacity (FVC)
- FEV1 (Forced expiratory volume in one second)
- FEV1/FVC Ratio
Components of Pulmonary Fuunction Tests
What is spirometry?
Measurement of the air moving in and out of lungs during various respiratory maneuvers
Generally, what does a spirogram look like?
What is diffusing capacity?
Measure of the ability of the lungs to transfer gas
Pulmonary function tests may be confusing in _________
Non pulmonary diseases such as heart failure
Describe the flow chart (STEPS you need to know for exam) for determining restrictive/obstructive/normal breathing pattern
Obstructive and Restrictive Patterns:
With FEV1/FVC ratio, what values would indicate a obstructive or restrictive pattern?
FEV1/FVC ratio = decreased = Obstructive pattern
FEV1/FVC ratio= normal/high = Restrictive pattern
