PULMONARY FUNCTION TEST (obstructive vs restrictive) Flashcards Preview

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Flashcards in PULMONARY FUNCTION TEST (obstructive vs restrictive) Deck (15):
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

inspiration (volume is increasing from right to left)

- begins with RV
- ends with TLC