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NBRC Registry Examination for Advanced Pulmonary Function Technologists Sample Questions:

1. During a linearity check of a flow sensor in a plethysmograph with a 3-liter calibration syringe, a pulmonary function technologist observes the following:

Which of the following should the technologist do?

A) Record these results and begin testing.
B) Recalibrate and repeat the linearity check.
C) Look for an obstruction in the flow sensor.
D) Perform an additional flow check at 10 L/sec.

2. Which of the following thresholds for a clinically significant change in lung function from the beginning to the end of a methacholine challenge test is significant?

A) A decline of more than 20% in inspiratory capacity
B) A decline of more than 30% in FEF25-75%
C) A decline of more than 20% in FEV1
D) An increase of more than 20% in airway resistance

3. In which of the following patients would an end-tidal CO2most likely produce values that are inconsistent with PaCO2?

A) 42 year old with moderate COPD
B) 12 year old with kyphoscoliosis
C) 20 year old who smokes cigarettes
D) 50 year old with mild scleroderma

4. In a patient with neuromuscular disease, which of the following is the best way to detect airway obstruction?

A) PEF
B) MIP
C) MVV
D) SGaw

5. A 9-year-old girl had an FVC of 2.35 L1 year ago. She was 122 cm (4 ft) tall and weighed 29.5 kg (65 lb).
Her current height is 127 cm (4 ft 2 in), and her weight is 34 kg (75 lb). The current FVC measurement is 2.20
L. The quality of both tests met ATS/ERS goals. A pulmonary function technologist should conclude the change is

A) Significant since her weight has changed.
B) Not significant since it is within normal test variability.
C) Not significant since it is less than a 15% decrease.
D) Significant since a decline is not expected.

Solutions: