Flashcards in PULMONARY FUNCTION TEST (obstructive vs restrictive) Deck (15)
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1
Pulmonary function test
- screening test
- obstructive disease
- restrictive disease
2
VITAL CAPACITY
- maximum volume of air that an individual can move in a single breath
3
FORCED VITAL CAPACITY
- most effective way to measure VC
- 5L
4
FORCED EXPIRATORY VOLUME (FEV1)
1 first second
- is the volume of air exhaled in the first second of the FVC maneuver
- 80%
- 4L
5
TIDAL VOLUME
- 500ml
6
INSPIRATORY CAPACITY
- 2L
- volume that we expire maximally
7
FRC
- VOLUME THAT REMAINS IN THE LUNG AFTER NORMAL EXPIRATION
- 4L
8
TOTAL LUNG VOLUME/CAPACITY
- 6L
9
RESIDUAL VOLUME
- volume remains in the lung after force maximal expiration
- FVC
- 1L
10
FEV1/FVC
- 4/5= 80%
11
OBSTRUCTIVE LUNG DISEASE
emphysema
asthma
TO THE LEFT
- decrease FVC 1L (MOST IMPORTANT)
- same IC 2L
dec moreFEV1:decFVC RATIO 50% 2L/4L= 50% DECREASE (MOST IMPORTANT)
- decrease expiratory peak flow
- shifts the pulmonary flow loop to the LEFT
12
RESTRICTIVE LUNG DISEASE (osis)
pulmonary fibrosis
asbestosis
TO THE RIGHT
- marked decrease FVC 3.5L
- decrease FEV1 3L
- decrease FRC
- marked decrease TLC (MOST IMPORTANT)
- decrease RV (MOST IMPORTANT)
- dec FEV1/more dec FVC RATIO= 3L/3.5/= 88% INCREASE expired during the 1 second of expiration or NORMAL (MOST IMPORTANT)
- decrease IC 1L
- decrease inspiratory peak flow
- shifts the pulmonary flow loop to the RIGHT
13
flow volume loops
- expiration
- inspiration
14
expiration (volume is increasing from right to left)
- begins with TLC
- ends with RV
15
