Spirometry Results 1 Results Flow/Volume Loops Volume/Time Graph Listen Visualize Observe Authored by William A. French. Medically reviewed by Dr. Barbara Erickson, PhD, RN, CCRN. LessonsIntroductionSpirometry and PFTReasons to Perform SpirometryThe LungsDefinitions & Nornal ValuesMeasurementsMeasuresPerforming a Test 1Performing a Test 2✓Results 1Results 2Interpretation Guidelines 1Interpretation Guidelines 2Degree of SeverityCOPDTry This OneRecommendations Medically reviewed: William A. French