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Pulmonary Function Testing PFT Interpretation Study Guide Practice Questions 2026/2027 | Respiratory Therapy Exam Prep | PFT Diagnostics Review

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Prepare effectively with this Pulmonary Function Testing PFT Interpretation Study Guide Practice Questions 2026/2027. Covers spirometry interpretation, obstructive and restrictive patterns, lung volumes, capacities, DLCO, bronchodilator response, respiratory physiology, clinical assessment, and exam-focused practice questions designed to strengthen diagnostic skills, improve performance, and support success in respiratory therapy and pulmonary diagnostics examinations.

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Pulmonary Function Testing PFT Interpretation
Pulmonary Function
Study Guide
Testing
Practice
PFT Questions.pdf
Interpretation
Pulmonary Function
Study Guide
Testing
Practice
PFT Questions.pdf
Interpretation Study Guide Practice Questions.pdf




Pulmonary Function Testing PFT
Interpretation Study Guide Practice
Questions




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Pulmonary Function Testing PFT Interpretation
Pulmonary Function
Study Guide
Testing
Practice
PFT Questions.pdf
Interpretation
Pulmonary Function
Study Guide
Testing
Practice
PFT Questions.pdf
Interpretation Study Guide Practice Questions.pdf

,Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf



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Terms in this set (41)



Lower Limit of Normal (LLN) A statistical threshold accounting for age, sex, height, and ethnicity,
reducing over-diagnosis of obstruction.


Obstructive Pattern (Spirometry) Decreased FEV1 (<80% predicted) and decreased FEV1/FVC ratio (<70% or
below LLN).




Restrictive Pattern (Spirometry) Decreased FEV1 (<80%) with a normal or elevated FEV1/FVC ratio (>70%).




Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf

,Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf




Gold Standard Confirmation for Restriction Total Lung Capacity (TLC) < 80% of predicted.


Spirometer Calibration Syringe Standard A 3-liter syringe with an acceptable accuracy range of ±3.5% (2.895 to
3.105 L).


ATPS to BTPS Conversion Effect Adjusts ambient measurements to body conditions, which always increases
the reported volume.


ATS-ERS Reversibility Criteria An increase in FEV1 or FVC by ≥12% and ≥200 mL after bronchodilator use.


Small Airways Disease (SAD) Indicator FEF25-75% below LLN with normal FEV1 and FEV1/FVC.


Normal Age-Related FVC/FEV1 Decline An average decrease of approximately 25-35 mL per year.



Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf

, Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf




Clinically Significant Yearly Decline in FVC/FEV1 A yearly decrease greater than 15%.


Obstructive Flow-Volume Loop Shape A scooped-out or concave expiratory limb with reduced flow.




Restrictive Flow-Volume Loop Shape A narrow, peaked loop with preserved flow but reduced overall volume.




Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf Pulmonary Function Testing (PFT) Interpretation.pdf

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