PULMONARY FUNCTION TEST (obstructive vs restrictive)

Question 1

Pulmonary function test

Answer 1

• screening test
• obstructive disease
• restrictive disease

Question 2

VITAL CAPACITY

Answer 2

• maximum volume of air that an individual can move in a single breath

Question 3

FORCED VITAL CAPACITY

Answer 3

• most effective way to measure VC

- 5L

Question 4

FORCED EXPIRATORY VOLUME (FEV1)

1 first second

Answer 4

• is the volume of air exhaled in the first second of the FVC maneuver
• 80%
• 4L

Question 5

TIDAL VOLUME

Answer 5

• 500ml

Question 6

INSPIRATORY CAPACITY

Answer 6

• 2L

- volume that we expire maximally

Question 7

FRC

Answer 7

• VOLUME THAT REMAINS IN THE LUNG AFTER NORMAL EXPIRATION

- 4L

Question 8

TOTAL LUNG VOLUME/CAPACITY

Answer 8

• 6L

Question 9

RESIDUAL VOLUME

Answer 9

• volume remains in the lung after force maximal expiration
• FVC
• 1L

Question 10

FEV1/FVC

Answer 10

• 4/5= 80%

Question 11

OBSTRUCTIVE LUNG DISEASE
emphysema
asthma
TO THE LEFT

Answer 11

• 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

Question 12

RESTRICTIVE LUNG DISEASE (osis)
pulmonary fibrosis
asbestosis
TO THE RIGHT

Answer 12

• 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

Question 13

flow volume loops

Answer 13

• expiration

- inspiration

Question 14

expiration (volume is increasing from right to left)

Answer 14

• begins with TLC

- ends with RV

Question 15

inspiration (volume is increasing from right to left)

Answer 15

• begins with RV

- ends with TLC