RPFT RPFT Equipment Calibration & Quality Control

Question 1

How often should a 3-liter calibration syringe be used to verify spirometer volume accuracy?

Accepted Answer

At least once daily before testing

Answer

ATS/ERS guidelines require volume calibration verification with a 3-liter syringe at least once each day testing is performed.

Question 2

What is the acceptable volume accuracy range for a spirometer calibration check using a 3-liter syringe?

Accepted Answer

Within ±3.5% or 65 mL

Answer

ATS/ERS standards require the measured volume to be within ±3.5% of the known syringe volume (±105 mL for a 3-L syringe).

Question 3

Which biological control method is used to track long-term spirometer performance trends in a PFT lab?

Accepted Answer

Testing a stable staff member and plotting control charts

Answer

Biologic controls involve repeated testing of a healthy, stable staff member whose values are charted over time to detect equipment drift.

Question 4

What does a linearity check of a spirometer assess?

Accepted Answer

Accuracy across the entire volume range, not just at 3 liters

Answer

Linearity testing verifies that the spirometer reads accurately at low, mid, and high volumes, ensuring consistent performance across the full range.

Question 5

When should a body plethysmograph undergo leak testing?

Accepted Answer

Daily before patient testing

Answer

Body plethysmograph leak checks should be performed daily, because even small leaks can significantly alter pressure measurements and falsify lung volume results.

RPFT - Registered Pulmonary Function Technologist Practice Test

RPFT - Registered Pulmonary Function Technologist Practice Test

RPFT RPFT Equipment Calibration & Quality Control