Phys/Pharm CCA Revision Flashcards
label this spirometry reading
what is spirometry?
method of assessing lung function by measuring the volume of air the pt is able to expel from lungs after max inspiration
what is FEV1?
volume exhaled in first second after deep inspiration and forced expiration, similar to PEFR
what is forced vital capacity?
total volume of air that the pt can forcibly exhale in one breath
FEV1/FVC
ratio of FEV1 to FVC expressed as a percentage
what are the reference ranges of:
* FEV1
* FVC
* FEV1/FVC ratio
- FEV1= >80% predicted
- FVC = >80% predicted
- FEV1/FVC ratio = >0.7
what are the typical spirometry findings in obstructive lung disease?
Typical spirometry findings in obstructive lung disease include:
- Reduced FEV1 (<80% of the predicted normal)
- Reduced FVC (but to a lesser extent than FEV1)
- FEV1/FVC ratio reduced (<0.7)
what is this spirometry pattern?
obstructive
when is it useful to assess reversibility in spirometry?
if considering asthma as a cause of obstructive airway disease
how do you assess reversibility using spirometry?
administer 400 mirograms of salbutamol and repeat spirometry after 15 mins
the presence of reversibility in spirometry is indicative of what?
asthma
partial reversibility in spirometry testing is indicative of what?
coexisting of asthma and another obstructive airway disease
what are 5 examples of obstructive lung disease?
- COPD
- Asthma
- Emphysema
- Bronchiectasis
- Cystic fibrosis
what are typical spirometry findings in restrictive lung disease?
- Reduced FEV1 (<80% of the predicted normal)
- Reduced FVC (<80% of the predicted normal)
- FEV1/FVC ratio normal (>0.7)
what is the spirometry reading?
restrictive
