Spirometry Flashcards
1
Q
What does spirometry measure
A
Only gas volumes and flow…NOT gas exchange
2
Q
Spirometry dependent on what and what is it focused on
A
Effort
Expiration
3
Q
Where is TLC on spirometry?
A
When volume = 0
4
Q
Spirometry cannot measure
A
TLC or RV
5
Q
Effect of cough
A
FEV could be falsely low if in 1st second
6
Q
Premature termination effect
A
Less than six seconds
FCV falsely low
7
Q
Poor effort
A
Both FEV1 and FVC could be falsely low
8
Q
Hesitation at start
A
FEV1 falsely low
9
Q
Obstruction
A
FEV1 less than 100% predicted
FVC may be low or normal
FEV1/FVC ratio is under 75%
Asthma, emphysema, bronchiestasis
10
Q
Restriction
A
FEV1 may be low or nomrmal
FVC lower than 80% predicted
FEV1/FVC ratio over .75
Pulmonary fibrosis or pleural effusipon
11
Q
Tracheal obstruction
A
WIll look like a square
