Flashcards in Lecture 4 Pulmonary Function Testing (missed this lecture) Deck (19):
1
What is FEV?
max volume of air that can be expired in the first second following max inspiration
2
What is FVC?
total volume of air that can be expired following max inspiration
3
FEV over FVC is usually around ___
0.8
4
In obstructive lung disease, FEV1 _______ dramatically. FVC _____ slightly. Thus, what happens to the FEV1/FVC?
decreases, decreases;
decreases below 70%
5
FEV1 is used to follow severity in _____
COPD
6
COPD is ____ + _____
bronchitis + emphysema
7
asthma, COPD, bronchiectasis, bronchiolitis, and _____ airway obstruction are examples of _____ lung disease
upper;
obstructive
8
In restrictive lung disease, there is ____ FEV1 and ______ FVC. What is the FEV1/FVC?
decreased, decreased; normal or greater than 80%
9
In obstructive lung disease, lung volumes are ____ than normal. In restrictive lung disease, lung volumes are ____ than normal
greater; less
10
bronchodilator response is the degree to which ____ improves with inhaled bronchodilator. it documents _____ airflow obstruction.
FEV1; reversible
11
There is a "significant bronchodilator response" if FEV1 increases by ___ % and ____ mL
12, 200
12
On a flow volume loop curve, the ___ axis describes the FVC. Inspiration is negative on the ___ axis, while expiration is positive
x, y
13
diffusing capacity measures the ability of the lungs to transport inhaled gas from the ____ to the _____. What gas is used?
alveoli, pulmonary capillaries; carbon monoxide
14
diffusion capacity depends on 3 things:
alveolar-capillary membrane, Hb concentration, and cardiac output
15
causes of increased diffusion capacity of CO:
____ (or normal), pulmonary ____, ______, or a __ to ___ shunt
asthma, hemorrhage, polycythemia, L to R
16
Of obstructive and restrictive lung disease, which has a decreased residual volume?
restrictive = decreased, obstructive = increased
17
restrictive lung disease is characterized by decreased _____
TLC
18
bronchoprovocation:
useful in diagnosis of ____ in the setting of normal pulm function tests. 2 common agents listed?
asthma; methacholine, histamine
19