PFT QUIZ 2 QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED
A+ NEWLY UPDATED 2025
After completing three flow-volume loops using a bedside pulmonary function
device, the therapist observes that the Forced Vital Capacity (FVC) values are
higher than some of the Slow Vital Capacity (SVC) results. What action
should the therapist take?
✔✔ C. Repeat the SVC maneuvers
Explanation:
Normally, SVC should be equal to or slightly higher than FVC. If FVC is greater,
it may suggest suboptimal effort or error during SVC attempts. Repeating SVC
ensures accurate comparison and proper interpretation.
How is a Fleisch pneumotachometer calibrated?
✔✔
It is calibrated using a 3-liter syringe at various flow rates or with a rotameter to
verify flow measurements.
How is a Body Box (plethysmograph) calibrated?
✔✔
Calibrated with a sinusoidal (sine wave) rotary pump, which mimics breathing
cycles to check the accuracy of lung volume measurements.
How is a Wright respirometer calibrated?
✔✔
Calibrated using a 1.5-liter super syringe at a consistent flow rate to ensure
volume measurement precision.
, What is used to calibrate 5% and 10% gas readings on a blood gas analyzer?
✔✔
Carbon dioxide (CO₂) gas mixtures are used to ensure CO₂ sensors are providing
accurate readings.
What is used to calibrate 0%, 12%, or 20% oxygen levels on a blood gas
analyzer?
✔✔
Oxygen (O₂) calibration gases are used to verify the accuracy of the oxygen
sensors in the analyzer.
Equipment to calibrate 21% and 100% - ANSWER✔✔Oxygen in a galvanic fuel
cell oxygen analyzer
To determine potential post-operative risk of a patient preparing for surgery, the
respiratory therapist should recommend which of the following tests?
a. cardiac stress test
b. pulmonary diffusion studies
c. basic spirometry
d. pulmonary stress test - ANSWER✔✔c. basic spirometry
Evaluation of maximum expiratory pressure (MEP) is most useful in evaluating
which of the following?
a. inspiratory muscle strength
b. presence of restrictive defect
c. fixed upper airway obstruction
d. forcefulness of cough - ANSWER✔✔d. forcefulness of cough
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED
A+ NEWLY UPDATED 2025
After completing three flow-volume loops using a bedside pulmonary function
device, the therapist observes that the Forced Vital Capacity (FVC) values are
higher than some of the Slow Vital Capacity (SVC) results. What action
should the therapist take?
✔✔ C. Repeat the SVC maneuvers
Explanation:
Normally, SVC should be equal to or slightly higher than FVC. If FVC is greater,
it may suggest suboptimal effort or error during SVC attempts. Repeating SVC
ensures accurate comparison and proper interpretation.
How is a Fleisch pneumotachometer calibrated?
✔✔
It is calibrated using a 3-liter syringe at various flow rates or with a rotameter to
verify flow measurements.
How is a Body Box (plethysmograph) calibrated?
✔✔
Calibrated with a sinusoidal (sine wave) rotary pump, which mimics breathing
cycles to check the accuracy of lung volume measurements.
How is a Wright respirometer calibrated?
✔✔
Calibrated using a 1.5-liter super syringe at a consistent flow rate to ensure
volume measurement precision.
, What is used to calibrate 5% and 10% gas readings on a blood gas analyzer?
✔✔
Carbon dioxide (CO₂) gas mixtures are used to ensure CO₂ sensors are providing
accurate readings.
What is used to calibrate 0%, 12%, or 20% oxygen levels on a blood gas
analyzer?
✔✔
Oxygen (O₂) calibration gases are used to verify the accuracy of the oxygen
sensors in the analyzer.
Equipment to calibrate 21% and 100% - ANSWER✔✔Oxygen in a galvanic fuel
cell oxygen analyzer
To determine potential post-operative risk of a patient preparing for surgery, the
respiratory therapist should recommend which of the following tests?
a. cardiac stress test
b. pulmonary diffusion studies
c. basic spirometry
d. pulmonary stress test - ANSWER✔✔c. basic spirometry
Evaluation of maximum expiratory pressure (MEP) is most useful in evaluating
which of the following?
a. inspiratory muscle strength
b. presence of restrictive defect
c. fixed upper airway obstruction
d. forcefulness of cough - ANSWER✔✔d. forcefulness of cough
