PFT QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS 100%
CORRECT RATED A +
Lung Volume Percentages (Relative to Total Lung Capacity)
TLC (Total Lung Capacity)
✔✔ 100%
Represents the full volume of air the lungs can hold after a maximum
inhalation.
VC (Vital Capacity)
✔✔ 80% of TLC
The maximum amount of air a person can exhale after a full inhalation.
IC (Inspiratory Capacity)
✔✔ 60% of TLC
The volume of air that can be inhaled after a normal exhalation.
FRC (Functional Residual Capacity)
✔✔ 40% of TLC
Air remaining in the lungs after a normal, passive exhalation.
RV (Residual Volume)
✔✔ 20% of TLC
Air that remains in the lungs after a forceful, complete exhalation.
Lung Volume Measurement Devices (Volume Tests)
✔✔
These are devices used to directly measure lung volumes:
, Water-seal spirometer
Wedge bellows spirometer
Dry rolling seal spirometer
Each of these devices measures the displacement of air to calculate lung volumes.
Flow Tests - ANSWER✔✔heated wire pneumotachometer
turbine flow
pitot
ultrasound flow
silverman pneumotachometer
fleisch pneumotachometer
what type of volume displacement device consists of 3 cylinders, one of which is
inverted in water? - ANSWER✔✔water seal spirometry
what type of volume displacement device is a collapsible bellows that folds or
unfolds (fan like) in response to breathing excursions and moves pen on paper? -
ANSWER✔✔bellow-type spirometer
what type of volume displacement device is an improvement from the water seal
and has a one-way valve and CO2 absorber for rebreathing tests?
*includes piston-in-cyclinder and a moving seal - ANSWER✔✔dry rolling
spirometer
Heated wire - ANSWER✔✔2 wires at diff. temps: keep dry
-measure expiratory flow
-serves as a reference wire
WITH COMPLETE SOLUTIONS 100%
CORRECT RATED A +
Lung Volume Percentages (Relative to Total Lung Capacity)
TLC (Total Lung Capacity)
✔✔ 100%
Represents the full volume of air the lungs can hold after a maximum
inhalation.
VC (Vital Capacity)
✔✔ 80% of TLC
The maximum amount of air a person can exhale after a full inhalation.
IC (Inspiratory Capacity)
✔✔ 60% of TLC
The volume of air that can be inhaled after a normal exhalation.
FRC (Functional Residual Capacity)
✔✔ 40% of TLC
Air remaining in the lungs after a normal, passive exhalation.
RV (Residual Volume)
✔✔ 20% of TLC
Air that remains in the lungs after a forceful, complete exhalation.
Lung Volume Measurement Devices (Volume Tests)
✔✔
These are devices used to directly measure lung volumes:
, Water-seal spirometer
Wedge bellows spirometer
Dry rolling seal spirometer
Each of these devices measures the displacement of air to calculate lung volumes.
Flow Tests - ANSWER✔✔heated wire pneumotachometer
turbine flow
pitot
ultrasound flow
silverman pneumotachometer
fleisch pneumotachometer
what type of volume displacement device consists of 3 cylinders, one of which is
inverted in water? - ANSWER✔✔water seal spirometry
what type of volume displacement device is a collapsible bellows that folds or
unfolds (fan like) in response to breathing excursions and moves pen on paper? -
ANSWER✔✔bellow-type spirometer
what type of volume displacement device is an improvement from the water seal
and has a one-way valve and CO2 absorber for rebreathing tests?
*includes piston-in-cyclinder and a moving seal - ANSWER✔✔dry rolling
spirometer
Heated wire - ANSWER✔✔2 wires at diff. temps: keep dry
-measure expiratory flow
-serves as a reference wire
