Spirometry Results 2 Flow/Volume Loops Normal Test Normal Data Set Multiple Efforts 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 2Results 1✓Results 2Interpretation Guidelines 1Interpretation Guidelines 2Degree of SeverityCOPDTry This OneRecommendationsSign-in to enable progress reports and certificates.