PFT 2

Question 1

How are static lung volumes measured and what does this assess?

Answer 1

Measured with slow breathing and they assess compliances “stretchability”

Question 2

What is vital capacity?

Answer 2

The amount of air that can be moved with ones own muscular effort

Question 3

What is the preferred method for PFT on COPD?

Answer 3

Body Plethysmography

Question 4

What is an increased RV/TLC indicitive of ?

Answer 4

Air trapping

Question 5

What is a normal RV/TLC?

Answer 5

20-30%

Question 6

What is the normal range for % predicted of capacities and lung volumes?

Answer 6

80-120%

Question 7

What does a spirogram compare?

Answer 7

forced expired Volume to time

Question 8

What measures are derived from the spirogram?

Answer 8

FEV1
FVC
FEV1/FCV ratio (absolute)

Question 9

What is FEV1?

Answer 9

Amount of air that can be expelled in first second

Question 10

What is FEV1 useful in asessing?

Answer 10

Obstructive lung d/o

determine the reversibility of contriction with bronchodilators

Question 11

A FEV1/FVC ratio that is less than 70% would indicate what kind of disorder?

Answer 11

obstructive