PFT Midterm Exam; Questions and
Answers(Grade A+)
Spirometers that use a pneumotachograph determine FVC by: Correct
Answer-Integration of flow signal
A flow-sensing device that measures pressure change across a fixed resistance:
Correct Answer-Pneumotachograph
A volume-displacement spirome...
PFT Midterm Exam; Questions and
Answers(Grade A+)
Spirometers that use a pneumotachograph determine FVC by: Correct
Answer-Integration of flow signal
A flow-sensing device that measures pressure change across a fixed resistance:
Correct Answer-Pneumotachograph
A volume-displacement spirometer that incorporates a piston-in-cylinder and a
moving seal: Correct Answer-Dry-rolling seal spirometer
A volume-displacement spirometer that consists of three cylinders, one of which
is inverted in water. Correct Answer-Water-sealed spirometer
A device with a disposable flow sensor that contains transducers that emit and
receive sound in alternating directions. Correct Answer-Ultrasonic spirometer
A device with a vane or wheel that turns at a speed proportional to airflow:
Correct Answer-Turbine spirometer
The laboratory volume-displacement spirometer is being validated with a 3-liter
calibration syringe. After injecting the completely filled syringe into the
, PFT Midterm Exam; Questions and
Answers(Grade A+)
spirometer, the spirometer displays a reading of 2.80 liters at ATPS. Which of the
following could be true? Correct Answer-Spirometer's results are not within
the range for acceptable validation.
The syringe or connecting tubing has a leak.
The spirometer has a leak.
A patient's FEV1 multiplied by 40 will give an estimate of: Correct Answer-
MVV
According to the 2005 ATS/ERS Spirometry Guideline, at least _______
acceptable forced spirometry maneuvers should be obtained, of which the two
largest FVC values and the two largest FEV1 values should each agree within
_______. Correct Answer-Three; 0.150 liters
The results of a patient's spirometry are as follows:
Which of the following is the most appropriate interpretation of these data?
Correct Answer-Airflow limitation
Predicted Measured After Rx
FVC (L): 4.08 2.85 3.29
FEV1 (L): 3.06 1.80 2.03
FEV1/FVC% 75 63 62
These results are most consistent with which of the following interpretations?
Correct Answer-Airflow limitation with significant improvement to Rx
A patient with shortness of breath performs spirometry with the following
results:
Maneuver 1 Maneuver 2 Maneuver 3
FVC (L): 3.22 3.29 3.35
FEV1 (L): 2.87 2.93 2.90 Correct Answer-Report an FVC=3.35 and FEV1=2.93
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