GE CARESCAPE - Gas exchange troubleshooting

Gasexchange
●Correctpositioningofthesamplingsetupinthepatientcircuit.
￭StraightY-piece(physicaldeadspace<8ml).
￭Ifaheatandmoistureexchanger(HME)oranHMEwithlter(HMEF)isused,
placeitbetweentheD-lite(+)/Pedi-lite(+)sensorandthepatient.
￭UsetheD-lite+sensorforcontinuousmonitoring.Condensedwaterinsidethe
D-litemaydistortthevolumereadings.
￭UseapediatricPedi-liteorPedi-lite+sensorforpediatricpatients(tidalvolumes
15mlto300ml)andremembertoselectthecorrectsensortypeinthemonitor
menu.
●Ventilatorfunction.
￭Checkthecircuitforanyleaksastheymaycauseinaccuratevolume
measurement.
￭Useofby-passowmayresultininaccuratevolumemeasurement.
￭Max.85%FiO
2
canbeused,higherreadingwillincreasethesensitivityofthe
Haldanetransformationtoerror.
Gasexchangetroubleshooting
ProblemSolution
Gasexchangevaluesaretoolow.●Checkthesamplinglineandconnectorsfor
leakage.
Gasexchangevaluesseemunreliable.●Checktheventilationmode.
●Checktheinspiredoxygenconcentrationand
correctifnecessary(max.85%).
●Iftheexpirationgasowduringtheendphaseof
thepatient’sexpirationisclosetozeroformore
thantwosecondsbeforethenextinspiration
starts,theventilator’sbypassowmayaffect
themeasurement.Youcanreducethiseffectby
addingasuitablespacerwitha5to10mldead
space(e.g.,astraightT-adapter)betweenthe
Y-pieceandtheD-liteorthePedi-liteadapter.
Moduledoesnotwork.●Checkandcleanthelterifnecessary.
●Checkthewatertrap.Ifitwastoofull,liquidmay
haveenteredthemodule.Replacethemoduleand
haveitcheckedbyauthorizedservicepersonnel.
Nogasexchangevalues.●Checkthatthegassamplinglineisnotconnected
tothesamplegasoutconnector.
VO
2
valuesarenon-physiologic.●Verifythattheoxygramcurveisstable.
●Changethesamplingline.
●ChecktheD-liteplacement.
Aregasexchangevaluesaccuratewith100%
oxygen?
No,gasexchangemeasurementsarenotpossible
whentheFiO
2
>85%.Thisisalsoindicatedonscreen
bythereplacementofnumbersby---.Pleasealso
notethatfullmeasurementaccuracyisobtained
whenFiO
2
islessthan65%.Between65%and85%
FiO
2
,theaccuracyisreducedto+/-15%
2062971-001CARESCAPEModularMonitors347