RPFT Online Practice Questions and Answers

The following results are obtained:

The RV/TLC ratio from these data is consistent with which of the following?

A. Obstructive defect

B. Normal lung volumes

C. Combined obstructive/restrictive defect

D. Restrictive defect

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. disconnected gas sampling line

C. drift in the flow transducer

D. acute decrease in FRC

A pulmonary function technologist can calculate which of the following if values for pH, PaO2, SaO2, SvO2 PvO2, VO2, and Hb are obtained?

A. Cardiac output

B. RER

C. VD/VT

D. Stroke volume

A pulmonary function technologist is performing an exercise study on a patient with sarcoidosis. Which of the following end-tidal CO2 values should the technologist expect at rest, if the test is performed appropriately?

A. 7-10%

B. 0-1.5%

C. 4-5%

D. 2-3%

Which of the following problems may be identified by using an isothermal lung analog to perform quality control on a body plethysmograph?

1.

Improperly calibrated mouth pressure transducer

2.

Obstructed or perforated pneumotachometer

3.

Increase in mechanical resistance

4.

Malfunctioning box pressure transducer

A. 3 and 4 only

B. 2 and 3 only

C. 1 and 4 only

D. 1 and 2 only

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. There was an air leak in the system.

B. The initial O2 concentration in the syringe was greater than 0.21.

C. The volume was not corrected from ATPS to BTPS.

D. The nitrogen analyzer gain was set too low.

The following results were obtained from a symptom-limited exercise (stress) test:

Which of the following is true regarding these data?

A. The patient is deconditioned.

B. The patient has a cardiac limitation to exercise.

C. The patient reached the anaerobic threshold.

D. The patient has a pulmonary limitation to exercise.

At maximum exercise, a 24-year-old patient's heart rate is 150/min with a VO2 of 750 mUmin. The calculated 02 pulse is most consistent with which of the following?

A. cystic fibrosis

B. cardiomyopathy

C. achievement of anaerobic threshold

D. deconditioning

When using a variable pressure plethysmograph, a leak in the door seal that develops subsequent to calibration will cause underestimation of

A. Raw

B. VTG

C. Alveolar pressure

D. vital capacity

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. IV solution has contaminated the blood sample.

B. Blood gas results are normal for someone at end-exercise.

C. The test indicates a right-to-left shunt.

D. There is air contamination since the PaCO2 is so low.

A pulmonary function technologist is asked to select gas concentrations to simulate pediatric patients' exhaled concentrations during a DLco simulation. Which of the following FECO concentrations should the technologist select?

A. 0.200

B. 0.300

C. 0.400

D. 0.100

A patient is performing a flow-volume loop. A pulmonary function technologist observes equal decreases in expiratory and inspiratory flows resulting in plateaus. Patient effort is satisfactory, and he follows instructions well. The technologist should expect the patient to have a

A. Small airways obstruction

B. Restrictive disorder

C. Variable large airways obstruction

D. Fixed large airways obstruction.

Which of the following tracings represents an airways resistance maneuver performed with a slow breathing frequency?

A. Option A

B. Option B

C. Option C

D. Option D

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. Remove 500 g of steel wool from the lung analog

B. Take the plethysmograph out of service

C. Recalculate the BTPS correction

D. Begin a biologic control program

A patient's vital capacity is slightly reduced, the FEWFVC is normal, and the uncorrected DLco is increased. Which of the following is the most likely diagnosis?

A. diffuse pulmonary fibrosis

B. diaphragmatic hemiparesis

C. kyphoscoliosis

D. polycythemia vera