RPFT Cheat Sheet 2026

The 30 highest-yield RPFT facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. A significant bronchodilator response is defined by ATS/ERS as an increase in FEV1 or FVC of at least how much? → ≥12% and ≥200 mL above baseline
2. Which of the following best explains why helium dilution FRC may be falsely LOW in a patient with a large pulmonary bulla? → The bulla does not communicate with ventilated airways, so helium never reaches it
3. Which gas mixture is used to calibrate the DLCO analyzer? → A precision gas with known concentrations of CO and an inert tracer gas
4. When should diagnostic procedures & interpretation be conducted in Registered Pulmonary Function Technologist? → At regular intervals and whenever significant changes occur
5. What is the recommended FIRST step when a safety concern is identified in a Registered Pulmonary Function Technologist setting? → Document the concern and notify the appropriate supervisor
6. What is the PRIMARY objective of emergency response & critical care within the Registered Pulmonary Function Technologist profession? → To ensure quality outcomes through standardized practices and continuous improvement
7. What does a linearity check of a spirometer assess? → Accuracy across the entire volume range, not just at 3 liters
8. Which clinical assessment & patient care method provides the MOST reliable results in Registered Pulmonary Function Technologist? → Standardized protocols with validated measurement tools
9. A DLCO reported as 55% of predicted is classified as: → Moderately reduced
10. During a single-breath DLCO maneuver, how long does the patient hold their breath at TLC after a rapid inhalation of test gas? → 10 seconds
11. What is the MOST effective way to stay current with developments in public health & community medicine for Registered Pulmonary Function Technologist? → Participating in professional development, industry events, and peer collaboration
12. What is the MOST important consideration when applying research methods & evidence-based practice in Registered Pulmonary Function Technologist? → Following established protocols while adapting to specific circumstances
13. What is the PRIMARY objective of public health & community medicine within the Registered Pulmonary Function Technologist profession? → To ensure quality outcomes through standardized practices and continuous improvement
14. During a forced vital capacity maneuver, what does a 'notch' or dip on the descending limb of the flow-volume loop suggest? → Upper airway obstruction or glottic closure during exhalation
15. According to ATS/ERS quality criteria, the minimum number of acceptable DLCO maneuvers required for a valid test session is: → 2
16. Which gas is used as the reference for the thermal conductivity detector in a helium dilution FRC measurement system? → Helium
17. The single-breath diffusing capacity (DLCO) test primarily measures the transfer of which gas across the alveolar-capillary membrane? → Carbon monoxide
18. When facing an unfamiliar challenge in pharmacology & treatment protocols within Registered Pulmonary Function Technologist, what is the BEST approach? → Research established best practices, consult colleagues, and document the approach
19. How should documentation & health records retention policies be determined in Registered Pulmonary Function Technologist? → Based on legal requirements, operational needs, and industry best practices
20. After replacing a flow sensor, what is the minimum verification a RPFT should perform before resuming patient testing? → Full calibration including volume accuracy and linearity checks
21. When interpreting lung volumes, which of the following isolated findings would suggest neuromuscular disease rather than parenchymal restriction? → Low TLC with disproportionately elevated RV and low maximal inspiratory pressure (MIP)
22. How often should a 3-liter calibration syringe be used to verify spirometer volume accuracy? → At least once daily before testing
23. Which competency is MOST essential for professionals working in emergency response & critical care in Registered Pulmonary Function Technologist? → Critical thinking combined with practical application of knowledge
24. A patient with significant anemia is found to have a low DLCO. What correction should be applied to interpret the result accurately? → Correct DLCO for hemoglobin concentration
25. Which lung volume compartment represents the volume of air remaining in the lungs after a maximal forced exhalation? → Residual volume (RV)
26. What factor MOST affects the validity of diagnostic procedures & interpretation outcomes in Registered Pulmonary Function Technologist? → The consistency and appropriateness of assessment methods used
27. What factor MOST affects the validity of clinical assessment & patient care outcomes in Registered Pulmonary Function Technologist? → The consistency and appropriateness of assessment methods used
28. What is the repeatability criterion for FVC when selecting the best two acceptable maneuvers? → The two largest FVC values must agree within 150 mL
29. Which factor BEST indicates mastery of pharmacology & treatment protocols in Registered Pulmonary Function Technologist? → The ability to adapt knowledge and skills to varying contexts while maintaining standards
30. Which action BEST demonstrates a commitment to professional ethics & legal standards in Registered Pulmonary Function Technologist? → Maintaining current knowledge of all applicable regulations and standards