PFT exam 2(pts(patient), pts. (patient), obst(obstructive) Restrictive) Qs & As

PFT exam 2(pts(patient), pts. (patient),
obst(obstructive) Restrictive) Qs & As
True or false: when performing a He dilution study, the FRC may be
underestimated in a pt w/ severe obstruction Correct Answer-true



True or false: a pt w/ polycythemia will have a falsely low DLCO? Correct
Answer-false



True or false: DLCO is often measured prior to and during treatment for certain
drugs such as bleomycin and amiodarone, to check for toxicity Correct
Answer-true



which of the following statements are true regarding FEF 25-75% (choose more
than one)



I. it is sensitive to early changes in Obst. lung disease

II it is the best indicator for pt effort

III. it is the measurement of the smaller AW's

IV. it is the main measurement to evaluate bronchodilator response Correct
Answer-I, III

, PFT exam 2(pts(patient), pts. (patient),
obst(obstructive) Restrictive) Qs & As
True or False: when performing a nitrogen washout study. If the patient. fails to
have their nitrogen reach as low as 1.5% even after 7 min. It is significant for
severe Obst. and air trapping Correct Answer-true



which of the following will result in a decrease in compliance (choose more than
one)

I. edema

II. emphysema

III. atelectasis

IV. pneumonia Correct Answer-I. edema,

III. atelectasis

IV. pneumonia



what is the expected FEV1/FVC ratio for a normal healthy adult? Correct
Answer-75% or greater



diffusion capacity is reduced in emphysema due to largely ? Correct Answer-
loss of alveolar capillary membrane