raphics ©raphics ©2000RespiMeduCOPYRIGHTNOTICE©2000RespiMedu,Inc.raphics.Allrightsreserved.ExceptaspermittedundertheCopyrightActof1976,nopartofthismaterialmaybereproducedinwholeorinpartinanymannerwithoutpermissioninwritingfromthecopyrightowners.PrintedintheU.S.A.raphics ©raphics ©2000RespiMeduSCALARSFlow/TimePressure/TimeVolume/raphics ©2000RespiMeduPressure-VolumeFlow-raphics ©2000RespiMeduSpontaneousBreathTime(sec)Flow(L/min)raphics ©2000RespiMeduMechanicalBreathInspirationExpirationFlow(L/min)Time(sec)raphics ©raphics ©2000RespiMeduInspiratoryFlowPatternInspirationExpirationTime(sec)Flow(L/min)BeginningofinspirationexhalationvalveclosesPeakinspiratoryflowratePIFRBeginningofexpirationexhalationvalveopensTotalcycletimeTCTInsp.timeTIExpiratoryTimeTE