CPFT FINAL PAPER QUESTIONS AND
SOLUTIONS
◉ What is important to remember before remembraning to
calibrate gases?
Answer: Check levels of solutions and gas cylinder, be sure they
are not low or empty. (Make sure tanks have pressure and aren't
empty before replacing electrodes!)
◉ This fuel cell measures P02.
Answer: Galvanic/Zircoinum fuel cell. (replace fuel cell if erractic)
◉ What is accuracy on galvanic fuel cell affected by? What % is
the 2 point calibration?
Answer: Water on sensor or high pressures.
21%/RA. 100%02.
◉ What is the fastest responding analyzer?
Answer: Galvanic fuel cell.
◉ How would you fix Polarogaphic fuel cell if it became erractic?
Answer: Check and replace batteries since it's battery operated or
level of electrolyte.
,◉ Method used for QC of blood gas analyzers. Used for blood
samples.
Answer: Tonometry
◉ Best method for precise control of the P02 electrode.
Answer: Tonometry
◉ What does the Tonometry require for equipment.
Answer: Humidified gases and temperature of 37c.
◉ MVV calculation prediction.
Answer: FEV1 x 35. Should give you good average.
◉ True or false: Valves that have direct contact with the patient's
exhaled gas should be sterilized after each use.
Answer: True
◉ How do you check for proper valve function during spirometry?
Answer: See if the flaps or diaphrams are sticking. (If patient cant
exhale/or valves not functioning valves could be backwards).
◉ What's a good way to figure out deadspace in breathing valve?
Answer: Fill w/ water, and empty, you'll see deadspace in mls of
water.
, ◉ True or false: increased resistance will give a false high volume
reading.
Answer: True. (Heat is used to reduce condensation, pneumotach
could read low after cleaning due to moisture).
◉ Contains a heated platinum wire or small metal bead that cools
as gas flows across it requiring an increased amount of current to
maintain the temperature.
Answer: Thermal element.
◉ True or false: decreased resistance (hole in mesh screen) will
give a false low volume reading.
Answer: True.
◉ True or false: Condensation and secretions will affect
measurement of pilot tube.
Answer: False.
◉ Low and high range for peak flow meter:
Accuracy affected by:
Answer: Low: PEFR 300-400 l/min
High: PEFR 600-800 l/min.
Accuracy affected by: Effort, moisture, debris.
SOLUTIONS
◉ What is important to remember before remembraning to
calibrate gases?
Answer: Check levels of solutions and gas cylinder, be sure they
are not low or empty. (Make sure tanks have pressure and aren't
empty before replacing electrodes!)
◉ This fuel cell measures P02.
Answer: Galvanic/Zircoinum fuel cell. (replace fuel cell if erractic)
◉ What is accuracy on galvanic fuel cell affected by? What % is
the 2 point calibration?
Answer: Water on sensor or high pressures.
21%/RA. 100%02.
◉ What is the fastest responding analyzer?
Answer: Galvanic fuel cell.
◉ How would you fix Polarogaphic fuel cell if it became erractic?
Answer: Check and replace batteries since it's battery operated or
level of electrolyte.
,◉ Method used for QC of blood gas analyzers. Used for blood
samples.
Answer: Tonometry
◉ Best method for precise control of the P02 electrode.
Answer: Tonometry
◉ What does the Tonometry require for equipment.
Answer: Humidified gases and temperature of 37c.
◉ MVV calculation prediction.
Answer: FEV1 x 35. Should give you good average.
◉ True or false: Valves that have direct contact with the patient's
exhaled gas should be sterilized after each use.
Answer: True
◉ How do you check for proper valve function during spirometry?
Answer: See if the flaps or diaphrams are sticking. (If patient cant
exhale/or valves not functioning valves could be backwards).
◉ What's a good way to figure out deadspace in breathing valve?
Answer: Fill w/ water, and empty, you'll see deadspace in mls of
water.
, ◉ True or false: increased resistance will give a false high volume
reading.
Answer: True. (Heat is used to reduce condensation, pneumotach
could read low after cleaning due to moisture).
◉ Contains a heated platinum wire or small metal bead that cools
as gas flows across it requiring an increased amount of current to
maintain the temperature.
Answer: Thermal element.
◉ True or false: decreased resistance (hole in mesh screen) will
give a false low volume reading.
Answer: True.
◉ True or false: Condensation and secretions will affect
measurement of pilot tube.
Answer: False.
◉ Low and high range for peak flow meter:
Accuracy affected by:
Answer: Low: PEFR 300-400 l/min
High: PEFR 600-800 l/min.
Accuracy affected by: Effort, moisture, debris.
