Pulmonary Function Tests

Question 1

Pulmonary function tests tell you:

Answer 1

ab the integrity of airways, function of respiratory muscles, and condition of the lung tissues

Measure lung volumes and capacities, gas flow rates, gas diffusion and distribution

Question 2

Spirometer

Answer 2

Most common PFT, measures volume of air and time

MAX inhalation followed by MAX exhalation

Can do multiple times/day after bronchodilators

Question 3

Pt instructions for PFT should be:

Answer 3

Take deep breath in
Place mouth piece in mouth, create good lip seal
Blow out all air in lungs, blow out air as forceful and fast as you can

Keep blowing till i say stop (for 6 seconds)

Question 4

How would you interpret PFT?

Answer 4

FVC = 80-85% predicted means pt does NOT have pulmonary restrxn

< 80% predicted = obstructive or restrictive pulmonary disease

FEV1 if % predicted is WNL

Question 5

How do you interpret type of disease?

Answer 5

FEV1/FVC

> 80% = restrictive lung disease

< 75% = obstructive lung disease