NBRC New 2022 RPFT Test Tutorial (Updated 112 Questions)
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NEW QUESTION 13
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 patient has developed a pneumothorax.
- B. The patient's minute ventilation has increased.
- C. The 10:30 blood sample has been contaminated with air.
- D. The 10:30 blood sample contains an excess of heparin solution.
Answer: B
NEW QUESTION 14
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 FEV1
- B. A decline of more than 30% in FEF25-75%
- C. An increase of more than 20% in airway resistance
- D. A decline of more than 20% in inspiratory capacity
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION 15
A 45-year-old female with sarcoidosis has pulmonary function tests annually. The following data have been recorded:
A pulmonary function technologist should conclude that
- A. The patient's restrictive component has worsened.
- B. Incorrect predicted values have been used.
- C. The patient has developed mild obstructive airway disease.
- D. The patient has a normal rate of loss for FEV1.
Answer: B
NEW QUESTION 16
A 54-year-old male with a normal ECG at rest develops dyspnea during an exercise (stress) test, and the following ECG pattern is noted at 25 watts:
25 mm/sec A pulmonary function technologist should
- A. Stop the test immediately; there is evidence of ischemia.
- B. Continue the test and obtain an arterial blood sample.
- C. Stop the test immediately; there is evidence of heart block.
- D. Continue the test until the subject reaches target heart rate.
Answer: C
NEW QUESTION 17
When using a variable pressure plethysmograph, a leak in the door seal that develops subsequent to calibration will cause underestimation of
- A. Raw
- B. Alveolar pressure
- C. vital capacity
- D. VTG
Answer: B
NEW QUESTION 18
The following values are obtained using a 3-liter calibration syringe during volume calibration of a dry-rolling spirometer:
2.80 L
2.79 L
2.82 L
The performance of this spirometer is best described as
- A. Neither accurate nor precise.
- B. Precise, but not accurate.
- C. Accurate, but not precise.
- D. Both accurate and precise.
Answer: C
NEW QUESTION 19
While performing a quality control test on an open circuit nitrogen system, the volume of a 3-liter syringe is measured as 3.9 L. Which of the following is the most probable explanation?
- A. The volume was not corrected from ATPS to BTPS.
- B. There was an air leak in the system.
- C. The nitrogen analyzer gain was set too low.
- D. The initial O2 concentration in the syringe was greater than 0.21.
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION 20
In setting up a CO analyzer, a pulmonary function technologist notices that the analyzer reads -0.03 while sampling air. The technologist should
- A. Reverse the sample flow.
- B. Adjust the reading to 0.00.
- C. Accept the reading because it is within ± 3%.
- D. Adjust the reading to +0.03.
Answer: B
Explanation:
Explanation
NEW QUESTION 21
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. Air and fully saturated 100% oxygen.
- C. Gas concentrations higher and lower than the expected measurement
- D. 100% oxygen and 100% nitrogen, fully saturated
Answer: C
NEW QUESTION 22
A pulmonary function technologist is performing quality control on a nebulizer used in the 5breath dosimeter bronchial challenge. The target output of the device is 0.09 mL, plus or minus 10%. After 10 actuations, the nebulizer output was 75uL with a 2.0 mL initial saline dose in the nebulizer. The technologist should
- A. Accept the results and begin using the device.
- B. Clean and reevaluate this nebulizer.
- C. Open the vent before starting the bronchial challenge.
- D. Add an exhalation filter and proceed with testing patients.
Answer: A
NEW QUESTION 23
Which of the following tracings represents an airways resistance maneuver performed with a slow breathing frequency?
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: A
NEW QUESTION 24
Airways resistance and specific conductance tests are requested for a 7-year-old child with asthma.
Which of the following techniques is preferred?
- A. Oscillation
- B. Interrupter
- C. Panting with body plethysmography
- D. Quiet breathing with body plethysmography
Answer: C
Explanation:
Explanation
NEW QUESTION 25
A pulmonary function technologist is reviewing results of a recent mechanical diffusion simulation using a 3-liter syringe. The test was conducted at a room temperature of 22°
C. The following BTPS results were reported:
Which of the following should the technologist do?
- A. Recalibrate the pneumotachometer.
- B. Recalibrate the gas analyzer.
- C. Change the calibration gases.
- D. Proceed with testing.
Answer: D
NEW QUESTION 26
During the calibration and set-up of the metabolic stress testing system for a patient breathing supplemental oxygen, which of the following gas concentrations will ensure accurate calibration of the system?
- A. Option D
- B. Option B
- C. Option A
- D. Option C
Answer: A
NEW QUESTION 27
Biological control data are obtained for lung volumes by plethysmography. The following results are obtained:
A pulmonary function technologist should repeat the test instructing the individual to
- A. Pant at 90 to 100 Hz
- B. Inhale to TV
- C. Inhale to TLC
- D. Pant at 40 to 50 Hz
Answer: C
NEW QUESTION 28
Using a peak flowmeter, a pulmonary function technologist obtains the following:
The technologist should
- A. Perform at least one more peak flow trial.
- B. Report the average of the two best efforts.
- C. Conclude that bronchodilatation has occurred.
- D. Report the patient's peak flow as 750 L/min.
Answer: A
NEW QUESTION 29
The following results are obtained from an adult patient:
Which of the following is the best interpretation of these values?
- A. Airways obstruction
- B. Small airway disease
- C. Normal values
- D. Combined obstruction/restriction
Answer: B
NEW QUESTION 30
Treadmill speed can be verified by
- A. Multiplying the belt length by the cycles/min.
- B. Multiplying the cycles/min by the height.
- C. Dividing the cycles/min by the belt length.
- D. Dividing the height by the horizontal distance.
Answer: A
NEW QUESTION 31
The following values are reported at maximum effort for a 50-year-old, 70-kg (154-lb) male with significant coronary artery disease during ergometer stress testing. Which of the following is most likely an error?
- A. VE65L/min
- B. HR145/min
- C. workload 200 watts
- D. RER1.2
Answer: C
NEW QUESTION 32
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. drift in the flow transducer
- B. acute decrease in FRC
- C. disconnected gas sampling line
- D. dynamic hyperinflation
Answer: B
NEW QUESTION 33
The following data are obtained for a 60-year-old male undergoing an exercise (stress) test on an ergometer:
A pulmonary function technologist should
- A. Stop the test because this is an abnormal VD/VT response.
- B. Continue the test since this is a normal cardiopulmonary response.
- C. Stop the test because the blood pressure response is abnormal.
- D. Stop the test because the heart rate is too high after 10 minutes.
Answer: C
NEW QUESTION 34
In which of the following patients would an end-tidal CO2most likely produce values that are inconsistent with PaCO2?
- A. 20 year old who smokes cigarettes
- B. 42 year old with moderate COPD
- C. 12 year old with kyphoscoliosis
- D. 50 year old with mild scleroderma
Answer: B
NEW QUESTION 35
A smoking cessation program using a nicotine patch is started for all smokers in a factory. Results revealed that smokers who reported they had quit had exhaled carbon monoxide levels less than 6 ppm. A pulmonary function technologist should conclude that
- A. The program was effective in accomplishing smoking cessation.
- B. The smokers had refrained from smoking for the previous 6 hours.
- C. Adifferent method of smoking cessation should be offered to improve outcomes.
- D. The smokers were not being truthful about smoking cessation.
Answer: A
NEW QUESTION 36
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. Perform an additional flow check at 10 L/sec.
- B. Record these results and begin testing.
- C. Recalibrate and repeat the linearity check.
- D. Look for an obstruction in the flow sensor.
Answer: D
NEW QUESTION 37
To check the reliability of a pulse oximeter reading, a pulmonary function technologist should
- A. Perform hemoximetry
- B. Measure the hematocrit
- C. Have the patient hyperventilate
- D. Calculate the SaO2from pH and PaO2
Answer: A
NEW QUESTION 38
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