Arterial Blood Gas Allen Test Allen Test Listen Visualize Observe Authored by William A. French. Medically reviewed by Dr. Barbara Erickson, PhD, RN, CCRN. LessonsOverviewCore ValuesIndicationsArterial PunctureRadial ArteryBrachial ArteryFemoral Artery✓Allen TestProcedure 1Procedure 2Blood Gas AnalysisBlood Gas AnalyzerElectrodesErrorsQuality ControlConclusion Medically reviewed: William A. French