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NBRC Registry Examination for Advanced Pulmonary Function Technologists Sample Questions:

1. A polarographic oxygen analyzer used to measure expired gas in a metabolic system should always be calibrated with

A) Oxygen mixtures containing 4% and 8% carbon dioxide
B) 100% oxygen and 100% nitrogen, fully saturated
C) Gas concentrations higher and lower than the expected measurement
D) Air and fully saturated 100% oxygen.

2. The following arterial blood gas results are obtained during the final workload of a cardiopulmonary exercise test:

Which of the following best explains these results?

A) Blood gas results are normal for someone at end-exercise.
B) The test indicates a right-to-left shunt.
C) IV solution has contaminated the blood sample.
D) There is air contamination since the PaCO2is so low.

3. The following results are obtained from an adult patient:
Which of the following is the best interpretation of these values?

A) Normal values
B) Combined obstruction/restriction
C) Airways obstruction
D) Small airway disease

4. Results of two blood gas samples drawn from the same patient, 30 minutes apart, are shown below:
Which of the following is the most likely explanation for these differences?

A) The 10:30 blood sample has been contaminated with air.
B) The patient's minute ventilation has increased.
C) The 10:30 blood sample contains an excess of heparin solution.
D) The patient has developed a pneumothorax.

5. A 35-year-old healthy male is performing a maximal stress test as part of an annual physical. The following data are observed:

The patient denies any symptoms. Which of the following should a pulmonary function technologist do first?

A) Obtain an arterial blood gas while continuing exercise
B) Administer oxygen at 3-4 L/min by nasal cannula
C) Move the pulse oximeter sensor to another site
D) Terminate the test and stabilize the patient.

Solutions: