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

During an exercise study, a pulmonary function technologist notices the systolic blood pressure increased to 270 mm Hg using an automated cuff. Which of the following should the technologist do?

A. Terminate the test and administer oxygen by nasal cannula.

B. Continue the test and recheck blood pressure using manual cuff method.

C. Terminate the test at this time and recheck blood pressure.

D. Continue the test if within 5 minutes of completion.

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

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

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

A biologic control subject has a FRCpleth of 4.0 ?.3 L at panting frequencies between 60 and 70/min.

During a QC run, the subject pants at 55/min and a FRCpleth of 3.90 L is recorded.

Which of the following is the most appropriate action to take?

A. Recalibrate the mouth pressure transducer and repeat the test.

B. Repeat the test, coaching the subject to pant more slowly.

C. Continue using the system because it is within control limits.

D. Take the plethysmograph out of service pending corrective maintenance.

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

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. Inhale to TV

B. Pant at 40 to 50 Hz

C. Pant at 90 to 100 Hz

D. Inhale to TLC

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

A. Calculate the SaO2 from pH and PaO2

B. Perform hemoximetry

C. Measure the hematocrit

D. Have the patient hyperventilate

A patient who is about to begin pulmonary function testing is visibly upset and complains to a pulmonary function technologist that she felt a receptionist was rude to her. Which of the following should the technologist do?

A. Try to get the patient to calm down by telling her that the receptionist is probably just having a bad day.

B. Give the patient time to calm down and ask the laboratory manager to become involved.

C. Ignore the complaint because it is not going to affect the testing about to begin.

D. Accompany the patient back to the reception area and try to determine who was at fault.