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PFT Final Exam Study Guide with Complete Solutions
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PFT Final Exam Study Guide with Complete Solutions
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PFT Final Exam Study Guide withComplete Solutions
1. The following volumes are reported for a patient. Which of the following capacities is
erroneous?
i. TLC 5.4 L RV 1.0 L
ii. IRV 2.6 L VC 4.2 L
iii. ERV 1.0 L VT 0.6 L
iv. FRC 2.0 L IC 3.2 L - ANSWER-a. TLC
b. VC
c. FRC
d. IC
A 25 y/o male has an uncorrected DLCO of 24.9 L/min/mmHg (69% of predicted) but no
history of pulmonary disease. Which of the following might explain these findings?
I.. Left to right shunt
II.. Carboxyhemoglobinemia
III.. Congestive heart failure
IV. Anemia - ANSWER-a. I and II only
b. III and IV only
c. I, II, and III
d. II, III, and IV
A decrease in lung compliance is consistent with all of the following EXCEPT: -
ANSWER-a. Fibrosis
b. Pulmonary edema
c. Pulmonary emboli
d. Emphysema
A outpatient has her VD/VT ratio measured as 0.48 (48%); this finding is - ANSWER-a.
Normal for an adult female
b. Consistent with pulmonary hypertension
c. Diagnostic of mild restrictive lung disease
d. Expected after surgical removal of one lung
A patient has an FEV1/FVC of 50%. This is consistent with: - ANSWER-a. Restrictive
lung disease
b. Obstructive lung disease
c. Both restrictive and obstructive lung disease
d. Normal lung function
A patient has the following results from a methacholine challenge test:
Dose FEV1
Baseline 4.25
, Diluent 3.80
Diluent 3.70
0.31 mg/ml 3.40 0.62
mg/ml 2.73
The percent change from diluent to 0.62 mg/ml is: - ANSWER-a. 26
b. 28
c. 32
A patient performs the 7 minute N2 washout procedure; after 5 minutes the % N2
displayed on the graph of the washout ids 0.5%. This is consistent with: - ANSWER-a.
Moderate obstructive disease
b. Mild restrictive disease
c. Normal distribution
d. Early small airway disease
A patient performs three FVC maneuvers using an analog spirometer. The technologist
reports that all maneuvers had a back-extrapolated volume of less than 5% and 150
mL. The maneuvers met all other criteria for acceptability and repeatability. The
technologist should: - ANSWER-a. Repeat all maneuvers
b. Correct the FEV1 and all other flows by the amount of the back-extrapolated volume
c. Perform at least one more maneuver
d. Report the average of the three FVC values
A patient takes 2 puffs of albuterol and testing is done immediately. The results did not
improve by much, what would you recommend? - ANSWER-a. Report the results as no
post bronchodilator improvement
b. Wait 4 hours to repeat the entire spirometry testing
c. Have the patient take 2 more puffs of albuterol and repeat the post spirometry testing
d. Wait 15-20 minutes before performing the post bronchodilator testing.
A patient with a history of COPD is being evaluated for disability. His FEV1 is 1.44L
(43% of predicted), and his DLCO is 14.5 ml CO/min /mmHg (61% of predicted). Which
of the following tests is most appropriate to perform next? - ANSWER-a. Lung volumes
by plethysmography
b. Room air arterial blood gases
c. Treadmill exercise test with pulse oximetry
d. Postbonchodilator spirometry
A patient with an FEV1 of 1.24 L and an FVC of 3.10 L performs the FRC test. The He
concentration between 6 and 6.5 minutes changed by 0.1%, and between 7 and 7.5
minutes changed by 0.08%. The technician correctly concludes equilibration has not
been reached. The most likely explanation is: - ANSWER-a. The patient is malingering
b. The N2 analyzer has malfunctioned
c. The CO2 absorber is contaminated
d. This is consistent with severe airway obstruction
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