PULMONARY FUNCTION TEST (obstructive vs restrictive) Flashcards
1
Q
Pulmonary function test
A
- screening test
- obstructive disease
- restrictive disease
2
Q
VITAL CAPACITY
A
- maximum volume of air that an individual can move in a single breath
3
Q
FORCED VITAL CAPACITY
A
- most effective way to measure VC
- 5L
4
Q
FORCED EXPIRATORY VOLUME (FEV1)
1 first second
A
- is the volume of air exhaled in the first second of the FVC maneuver
- 80%
- 4L
5
Q
TIDAL VOLUME
A
- 500ml
6
Q
INSPIRATORY CAPACITY
A
- 2L
- volume that we expire maximally
7
Q
FRC
A
- VOLUME THAT REMAINS IN THE LUNG AFTER NORMAL EXPIRATION
- 4L
8
Q
TOTAL LUNG VOLUME/CAPACITY
A
- 6L
9
Q
RESIDUAL VOLUME
A
- volume remains in the lung after force maximal expiration
- FVC
- 1L
10
Q
FEV1/FVC
A
- 4/5= 80%
11
Q
OBSTRUCTIVE LUNG DISEASE
emphysema
asthma
TO THE LEFT
A
- 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
Q
RESTRICTIVE LUNG DISEASE (osis)
pulmonary fibrosis
asbestosis
TO THE RIGHT
A
- 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
Q
flow volume loops
A
- expiration
- inspiration
14
Q
expiration (volume is increasing from right to left)
A
- begins with TLC
- ends with RV
15
Q
inspiration (volume is increasing from right to left)
A
- begins with RV
- ends with TLC
