While checking the accuracy of a portable spirometer for volumetric measures with a
calibrated super syringe, you obtain a mean measured value of 2.7 L. What is the percent
error of this instrument? Correct Ans-10%
What is the ability of a measuring device to consistently provide the same measure of the
same quantity? Correct Ans-Precision
What do we measure to determine the precision of an instrument? Correct Ans-Standard
deviation (SD) of the mean measured reference value
What is the American Thoracic Society standard for volumetric accuracy of spirometers?
Correct Ans-±3% error, or within 50 ml of the reference value
What is the American Thoracic Society standard for accuracy when measuring flows during
pulmonary function testing? Correct Ans-95% accuracy or within 0.20 L/sec, whichever is
greater
How often should a spirometer in continual use undergo volumetric calibration? Correct
Ans-At least daily
Tests of pulmonary mechanics include
1. maximum voluntary ventilation.
, PFT exam with Complete Solutions
2. functional residual capacity.
3. forced expiratory flows.
4. forced expiratory volumes. Correct Ans-1. maximum voluntary ventilation.
3. forced expiratory flows.
4. forced expiratory volumes.
Which of the following adverse reactions are typically seen with pulmonary function testing?
1. Syncope
2. Cough
3. Hemoptysis
4. Chest pain Correct Ans-1. Syncope
2. Cough
4. Chest pain
What is the most common measurement of pulmonary mechanics during pulmonary function
testing? Correct Ans-Forced vital capacity
Which of the following statements are true regarding measurement of the patient's forced
vital capacity (FVC)?
1. The patient can be sitting or standing.
2. Nose clips are not required.
3. It is an effort-dependent test.
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