Pulmonary Function Test (PFT) Interpretation Algorithm Approach to PFTs: 1) Look at Flow-Volume Loop if available 2) FEV1/FVC < 70% (obstruction or not?) 3) FVC < LLN? (restrictive component?) 4) TLC < LLN? (confirm restrictive component) 5) DLCO < LLN? (diffusion defect?) 6) Consider Reversibility, grade Severity, #Pulmonary #Function #Test #PFT #Interpretation #Algorithm #diagnosis
