GE CARESCAPE - TRAM modules’ NIBP technology

Non-invasivebloodpressure
●x=Cuffpulsationwaveform
●y=Cuffpressure
1.Cuffdeation
2.Systolicpressure(ratioofmaximumamplitude)
3.Meanarterialpressure(maximumpulsationamplitude)
4.Diastolicpressure(ratioofmaximumamplitude)
5.Cuffpulsations(eachpulsationrepresentsoneheartbeat)
6.Amplitude(changesbasedoncuffpressure)
7.Resultingwaveform
Systolicanddiastolicdeterminationsarebasedonamathematicalcalculationwithin
thealgorithm.Thedeationmodeisheartratedependent,itistypicallylongerwith
heartratesthatareslowand/orirregular.
Thispatentedprocessofndingtwomatchedpulsationsofrelativelyequalamplitude
andfrequencyateachsteprejectsartifactduetopatientmovementorother
deviationsfromidealconditions(e.g.,cuffdisturbances)andgreatlyenhancesthe
overallaccuracyofthemonitor.
NOTE
NIBPvaluesarebasedontheoscillometricmethodof
non-invasivebloodpressuremeasurementtakenwithacuff
onthearmofadultandchildpatients,andacuffonthe
calfofinfants.Thevaluescorrespondtocomparisonswith
intra-arterialvalueswithinANSI/AAMISP10andIECparticular
standardsforaccuracy(ameandifferenceof±5mmHg,and
astandarddeviationof<8mmHg).
TRAMmodules’NIBPtechnology
TRAMmodulesusetheDINAMAPClassicalgorithm.Thisalgorithmmeasuresthe
meanarterialpressureandthendeterminesthesystolicanddiastolicvalues.The
algorithmexaminespulsesfromthecuffandwaitsfortwosequentialpulsesequal
inbothfrequencyandamplitude.Itwillnotdeatethecuffuntilithasgooddata.
Artifactandfalsepulsesarerejected.
230CARESCAPEModularMonitors2062971-001