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NBRC Registry Examination for Advanced Pulmonary Function Technologists Sample Questions:

1. The normal response to an increasing PaCO2is

A) To maintain a constant VEuntil the PaCO2exceeds 55 torr.
B) An increase in VEof 1 to 6 L/min/torr PCO2.
C) A decrease in VEof 2to5L/min/torrPCO2.
D) An increase in VEof 10to15L/min/torrPCO2.

2.
Which of the above patterns illustrates the effect of increasing temperature in the plethysmograph during airways resistance measurement?

A) 4
B) 2
C) 3
D) 1

3. A pulmonary function laboratory routinely tests five subjects as biologic controls. Acceptable instrument performance over time is indicated when measurements

A) Are within the 95% confidence interval predicted for an individual being tested.
B) Of the group as a whole agree with those predicted by linear regression for changes in age.
C) For an individual are within 2 standard deviations of the mean of those for the group.
D) For each individual are within 2 standard deviations of the mean of previous measurements for each individual.

4. A pulmonary function technologist is performing an exercise (stress) test on a patient with severe COPD. As the test progresses, the patient shows signs of increasing dyspnea. Measurements of inspiratory capacity decreased from 2.0 L to 1.5 L. Which of the following most likely occurred?

A) dynamic hyperinflation
B) acute decrease in FRC
C) disconnected gas sampling line
D) drift in the flow transducer

5. An isothermal lung analog has the following specifications:
5-L glass bottle
2000 g of steel wool
Density of steel wool 5 g/cm3
Volume of connectors and bulb 100 mi-Repeated FRC measurements in the plethysmograph result in a volume of 5.5 L.
Which of the following should a pulmonary function technologist do?

A) Take the plethysmograph out of service
B) Recalculate the BTPS correction
C) Remove 500 g of steel wool from the lung analog
D) Begin a biologic control program

Solutions: