Pulmonary function tests

Question 1

Obstructive picture on spirometry

Answer 1

FEV1 = sig reduced
FVC = normal or reduced
FEV1/FVC = reduced (<70%/0.7)

Question 2

Restrictive picture on spirometry

Answer 2

FEV1 = reduced
FVC = sig reduced
FEV1/FVC = Increased (>70%/0.7)

Question 3

Causes of obstructive picture

Answer 3

COPD
Asthma
Bronchiectasis

Question 4

Causes of restrictive picture

Answer 4

PF
Asbestosis
ARDD
Sarcoidosis
Ank spond(kyphoscoliosis)
Neuromuscular disorders
Severe obesity

Question 5

Define FEV1

Answer 5

Air a person can forcefully exhale in one second.

Question 6

Define FVC

Answer 6

total air a person can exhale after full inhlalation

Question 7

What is peak flow

Answer 7

• Measures the fastest p[oint of expiratpry flow of air
• Helps gauge severity of acute obstructive disease