Question 1

A 50-ml sine-wave pump is used to calibrate a 450-L plethysmograph.While the pump is running,the computer display shows a deflection of 25 cm.What is the box calibration factor for this system?

Accepted Answer

A)  0.5 L/cm 
B)  1.25 L/cm 
C)  2 ml/cm 
D)  0.5 ml/cm

Question 2

What would be your next action after reviewing the data from the following level 1 PaO2 QC Levy-Jennings plot?

Accepted Answer

A)  Begin analyzing blood gases because the instrument is in-control. 
B)  Run one additional Level 1 control to determine instrument status. 
C)  Take the instrument out of service because it is out-of-control. 
D)  Run the next control level to determine instrument status.

Question 3

A 3-L syringe is used to calibrate a flow-sensing spirometer;the spirometer reads a volume of 3.04 L.The software correction factor for this system would be which of the following?

Accepted Answer

A)  0.95 
B)  0.99 
C)  1.01 
D)  1.04

Question 4

Quality control of a body plethysmograph is performed using an isothermal lung analog and a biologic control subject with the following results:  On the basis of these findings,the pulmonary function technologist should conclude what?

Accepted Answer

A)  There is a leak in the door seal. 
B)  Box pressure calibration was performed incorrectly. 
C)  Mouth pressure calibration was performed incorrectly. 
D)  The box is functioning within acceptable limits.

Question 5

Quality control run on a PO2 electrode shows the following results when plotted on a QC chart:  Which of the following best describes the result of run 7?

Accepted Answer

A)  Out-of-control situation 
B)  Shift 
C)  Trend 
D)  Random error

Question 6

The acceptable range for accuracy of a spirometer checked with a 3-L syringe is:

Accepted Answer

A)  0.00 to 14.00 L 
B)  0.00 to 8.00 L 
C)  2.910 to 3.090 L 
D)  2.895 to 3.105 L

Question 7

According to ATS-ERS recommendations (2005),a computer display of flow-volume curves should have a scale factor of:

Accepted Answer

A)  5 mm/L on the volume axis 
B)  5 mm/L/sec on the flow axis 
C)  20 mm/sec on the time axis 
D)  A 1:1 aspect ratio with expiratory flow plotted downward

Question 8

A CO2 analyzer is calibrated using a 5% CO2 mixture with the sampling pump set at 500 ml/min;a water vapor absorber is then added to the sample line.Which of the following should be done before using this system?

Accepted Answer

A)  Increase the sampling pump flow to at least 750 ml/min. 
B)  Decrease the sampling pump flow to less than 50 ml/min. 
C)  Recalibrate the analyzer. 
D)  Calculate the "corrected" CO2 reading.

Question 9

While performing a calibration check of a spirometer using a 3.00-L syringe,2.84 L is measured.What should you do next?

Accepted Answer

A)  Proceed with testing subjects. 
B)  Add 0.16 L to all subject measurements. 
C)  Check for leaks and recheck calibration. 
D)  Turn on the BTPS correction and recheck calibration.

Question 10

A pulmonary function technologist uses an isothermal lung analog to check the accuracy of a constant volume plethysmograph.The lung analog has a volume of 4.00 L.Simulating the VTG maneuver produces the following volumes:  On the basis of these findings,the technologist should:

Accepted Answer

A)  Check the door seal for leaks or cracks. 
B)  Recalibrate the box pressure transducer. 
C)  Zero the mouth pressure transducer and repeat the measurement. 
D)  Begin patient testing with the body box.

Question 11

The pulmonary function technologist should observe which of the following precautions in drawing an arterial blood sample?

Accepted Answer

A)  Determine whether gloves are needed by checking the patient's history. 
B)  Carefully resheath used needles using the original protective covering. 
C)  Dispose of used needles in puncture-resistant containers marked "biohazard." 
D)  Use protective barriers if there is danger of blood splashing.

Question 12

A 3-L syringe is used to check the calibration of a portable spirometer,and the following results are obtained:  Which of the following best describes these findings?

Accepted Answer

A)  The spirometer temperature is less than 24$\degree$ C. 
B)  The BTPS correction factor is being applied. 
C)  The syringe has a small but significant leak. 
D)  The spirometer is functioning acceptably.

Question 13

All of the following statements are important ATS instrument specifications except:

Accepted Answer

A)  Back pressure and resistance must be less than 1.5 cm H2O/L/sec up to an air flow of 14 L/sec. 
B)  Spirometer must be capable of measuring volumes of at least 8 L (BTPS)with flows between zero and 14 L/sec. 
C)  The paper must move at a chart speed of at least 32 mm/sec. 
D)  Spirometer must be capable of measuring expired volumes for at least 15 seconds.

Exam 12: Quality Systems in the Pulmonary Function Laboratory

A 50-ml sine-wave pump is used to calibrate a 450-L plethysmograph.While the pump is running,the computer display shows a deflection of 25 cm.What is the box calibration factor for this system?

What would be your next action after reviewing the data from the following level 1 PaO₂ QC Levy-Jennings plot?

A 3-L syringe is used to calibrate a flow-sensing spirometer;the spirometer reads a volume of 3.04 L.The software correction factor for this system would be which of the following?

Quality control of a body plethysmograph is performed using an isothermal lung analog and a biologic control subject with the following results: On the basis of these findings,the pulmonary function technologist should conclude what?

Quality control run on a PO₂ electrode shows the following results when plotted on a QC chart: Which of the following best describes the result of run 7?

The acceptable range for accuracy of a spirometer checked with a 3-L syringe is:

According to ATS-ERS recommendations (2005) ,a computer display of flow-volume curves should have a scale factor of:

A CO₂ analyzer is calibrated using a 5% CO₂ mixture with the sampling pump set at 500 ml/min;a water vapor absorber is then added to the sample line.Which of the following should be done before using this system?

While performing a calibration check of a spirometer using a 3.00-L syringe,2.84 L is measured.What should you do next?

A pulmonary function technologist uses an isothermal lung analog to check the accuracy of a constant volume plethysmograph.The lung analog has a volume of 4.00 L.Simulating the V_TG maneuver produces the following volumes: On the basis of these findings,the technologist should:

The pulmonary function technologist should observe which of the following precautions in drawing an arterial blood sample?

All of the following statements are important ATS instrument specifications except: