PFTs Flashcards
1
Q
define obstructive disease
A
air can’t get out
2
Q
2 subtypes of obstructive
A
- asthma
2. COPD
3
Q
2 subtypes of COPD
A
- emphysema
2. chronic bronchitis
4
Q
formula for resistance
A
^P/flow
5
Q
key to asthma
A
- reversible
- narrowing by smooth muscle
- mucous hypersecretion
6
Q
2 key things to look for in asthma with broncodilator
A
- FEV1 > 12%
2. > 180cc
7
Q
define chronic bronch.
A
cough with sputum most days > 3month/year, 2 years in row
8
Q
what happens to inflation in emphysema
A
hyperinflation - TLC increases
9
Q
2 types of restriction causes
A
- chest wall
2. lung scarring
10
Q
3 things measured with PFT
A
- volume
- flow
- diffusion
11
Q
3 measures of volume
A
- TLC - total inspiration
- FRC - end of quiet expiration
- RV - end of hard expiration
12
Q
2 ways to measure FRC
A
- He dilution
2. body box
13
Q
what does a large diff between He and body box measures
A
gas trapping
14
Q
what do the curves of an FT curve represent
A
flow vs. volume
15
Q
when is flow normally bigger, before or after FEV50
A
before
