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NBRC Registry Examination for Advanced Pulmonary Function Technologists Sample Questions:

1. To check the reliability of a pulse oximeter reading, a pulmonary function technologist should

A) Have the patient hyperventilate
B) Perform hemoximetry
C) Measure the hematocrit
D) Calculate the SaO2from pH and PaO2

2. Which of the following information reported from a recent methacholine challenge test best summarizes the patient's bronchial hyperresponsiveness?

A) postbronchodilator recovery FEV1= 106% baseline
B) patient reported chest tightness and a cough
C) PC20= 2.3 mg/mL
D) diluent FEV1= 92% predicted

3. A treadmill belt stops for a fraction of a second each time the patient takes a step. A pulmonary function technologist should

A) Increase the speed of the belt.
B) Tighten the belt.
C) Decrease the treadmill grade.
D) Instruct the patient to use the hand rails.

4. During a cardiopulmonary stress test using breath-by-breath gas analysis, a pulmonary function technologist notices that the VO2suddenly decreases. Which of the following may explain this change?
1. The patient has achieved anaerobic threshold.
2. The measurement of the expired gas volumes is inaccurate.
3. O2analyzer "phase delay" has increased.
4. There is a leak in the tubing or mouthpiece.

A) 1, 2, and 3 only
B) 1, 2, and 4 only
C) 2, 3, and 4 only
D) 1, 3, and 4 only

5. A comparison of two techniques for measuring Rawis shown below:

Which of the following should a pulmonary function technologist conclude?

A) Results are consistent with the two methodologies.
B) Subjects 1 and 2 both have reactive airways.
C) The system was calibrated for quiet breathing.
D) Subject 1 panted too forcefully.

Solutions: