PFT ACNP Student Cheat Sheet
Pulmonary Function Tests Pulmonary Function Tests (cont) Pulmonary Function Tests (cont)
Pulmonary •Categorization of different types Evaluate 1. When evaluating a PFTs think: Obstruct Overexpansion of lungs – loss of
function of lung processes (restrictive PFT’s •expiratory flow • Lung volumes ive recoil. Reduction in AIRFLOW.
tests versus obstructive) •Diffusion capacity •Response to Disease FEV1/FVC Ratio is decreased
(PFTs) •Assessment of disease severity bronchodilators (<70%). Difficulty exhaling, narrowed
(prognosis and preoperative 2. Look for all normals everything
airways, bronchoconstrict ion, mucus
evaluation) >80% . Most smokers have normal accumulation. COPD
•Post-treatment evaluation of values. [Emphys
ema, Chronic
lung function. 3. Look for restrictive disease
bronchi tis], Asthma.
TLC< 80% . If TLC not known
Restricti Reduction in lung VOLUME.
reflected in a proportional decrease
ve Difficulty taking air in from STIFF
in FEV1 and FVC (i.e., FEV1/FVC =
Disease lung. Total lung capacity
80% but FVC is< 80%).
4. If restrictive check DLCO for decreased (< 80%). ILD, scoliosis,
extra-thoracic or in intra-thoracic. If obesity, PNA, Fibrosis,
the decrease in DLCO is consolidation, Tumors due to both
proportional to the decrease in TLC a decreased VC and RV.
means the restriction is not due to
parenchymal disease it is of Pulmonary Function Tests
extra-thoracic origin think of obesity
TLC (total The volume of air in the lungs after
and kyphosis. If the decrease in
lung maximum inspiration. High in
DLCO is disproportionately low
capacity: obstruc
tive (>120%
compared to the decrease in TLC
VC+RV) hyperinflation). Low in
think of interstitial lung disease.
N=80– restric
tive (<80%, decreased
5. Look for obstructive FEV1 and
120% lung volume) .
FEV1/FVC are low (<70%).
6. If obstructive, check the TLC, FEV1 Total volume of air able to exhale
DLCO, and reaction to (forced in the first second during maximal
beta2-agonists: Emphysema if the expiratory effort. Low (<80%) in
TLC is high but the DLCO is low volume) obstructive. Normal to slightly
(alveolar disease); minimal-to-no N=80– low (<80%) in restric tive
response to beta2-agonist. Asthma 120% (proportional to volume).
if the DLCO is normal, or there Bronchodil ator response >12%
typically is a reaction to and 200mL increased FEV1
beta2-agonist. (+asthma vs -COPD).
VC (vital Volume of air expelled from the
capacity) lungs during a maximum
expiration. Low in restrictive
(problem with lung dynamic, large
airway is intact, so ILD).
By xkissmekatex (kissmekate) Published 13th January, 2017. Sponsored by Readability-Score.com
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Pulmonary Function Tests Pulmonary Function Tests (cont) Pulmonary Function Tests (cont)
Pulmonary •Categorization of different types Evaluate 1. When evaluating a PFTs think: Obstruct Overexpansion of lungs – loss of
function of lung processes (restrictive PFT’s •expiratory flow • Lung volumes ive recoil. Reduction in AIRFLOW.
tests versus obstructive) •Diffusion capacity •Response to Disease FEV1/FVC Ratio is decreased
(PFTs) •Assessment of disease severity bronchodilators (<70%). Difficulty exhaling, narrowed
(prognosis and preoperative 2. Look for all normals everything
airways, bronchoconstrict ion, mucus
evaluation) >80% . Most smokers have normal accumulation. COPD
•Post-treatment evaluation of values. [Emphys
ema, Chronic
lung function. 3. Look for restrictive disease
bronchi tis], Asthma.
TLC< 80% . If TLC not known
Restricti Reduction in lung VOLUME.
reflected in a proportional decrease
ve Difficulty taking air in from STIFF
in FEV1 and FVC (i.e., FEV1/FVC =
Disease lung. Total lung capacity
80% but FVC is< 80%).
4. If restrictive check DLCO for decreased (< 80%). ILD, scoliosis,
extra-thoracic or in intra-thoracic. If obesity, PNA, Fibrosis,
the decrease in DLCO is consolidation, Tumors due to both
proportional to the decrease in TLC a decreased VC and RV.
means the restriction is not due to
parenchymal disease it is of Pulmonary Function Tests
extra-thoracic origin think of obesity
TLC (total The volume of air in the lungs after
and kyphosis. If the decrease in
lung maximum inspiration. High in
DLCO is disproportionately low
capacity: obstruc
tive (>120%
compared to the decrease in TLC
VC+RV) hyperinflation). Low in
think of interstitial lung disease.
N=80– restric
tive (<80%, decreased
5. Look for obstructive FEV1 and
120% lung volume) .
FEV1/FVC are low (<70%).
6. If obstructive, check the TLC, FEV1 Total volume of air able to exhale
DLCO, and reaction to (forced in the first second during maximal
beta2-agonists: Emphysema if the expiratory effort. Low (<80%) in
TLC is high but the DLCO is low volume) obstructive. Normal to slightly
(alveolar disease); minimal-to-no N=80– low (<80%) in restric tive
response to beta2-agonist. Asthma 120% (proportional to volume).
if the DLCO is normal, or there Bronchodil ator response >12%
typically is a reaction to and 200mL increased FEV1
beta2-agonist. (+asthma vs -COPD).
VC (vital Volume of air expelled from the
capacity) lungs during a maximum
expiration. Low in restrictive
(problem with lung dynamic, large
airway is intact, so ILD).
By xkissmekatex (kissmekate) Published 13th January, 2017. Sponsored by Readability-Score.com
Last updated 16th January, 2017. Measure your website readability!
Page 1 of 4. https://readability-score.com
