GE CARESCAPE ONE - Page 196

CO₂
ProblemSolution
Whycanweseedipsinthecapnogramduring
expiration?
●Dipsinthecapnogramcanbeduetopatient
conditions.“Clefts”inthecapnogramareseen
asactionofmusclerelaxantisimpactedby
spontaneousventilation.
●Thedipsseeninthecapnogramduringexpiration
mayberelatedtothesidestreamgassampling,the
continuousgasowtotheY-piece,andpatient’s
cardiaccontractions,whichcauseintra-thoracic
pressurechangesandthereforeowvariations.
ApressuretransducerintheLoFloSidestream
Moduleminimizesowvariationsbymeasuring
andadjustingforchangesinairwaypressures.
WhyistheEtCO
2
valueconsiderablylowerthan
theCO
2
partialpressuredeterminedbybloodgas
analysis?
●EtCO
2
valuesarealwayslowerthanpaCO
2
values
measuredbybloodgasanalysis.
●Thetypicalclinicalreasonsaredead-space
ventilation,ventilation/perfusionmismatch,adrop
incardiacoutput,alveolarshunts,andincomplete
emptyingofthealveoli.
●TheEtCO
2
-paCO
2
gradientcanbeanindicatorof
aclinicalconditionsuchasanincreaseinalveolar
deadspace.
●Alsochecktheintegrityofthebreathing
circuit;blood-gasanalysiscorrectedtoalower
temperatureincaseofhypothermia.
Thesamplecellisinserted,butthepumpdoesnot
turnonandtheCheckAdaptermessageisdisplayed.
●Checkthatthesamplecellisfullyinserted.
●TheLoFloSidestreamModulemayneedtowarm
uptobedetected.
●CheckthattheLoFloSidestreamModuleis
connectedtotheCARESCAPECO
2
.
●Checkthesamplecelloftheaccessoryfordamage
orocclusion.
196CARESCAPEONE2094480-001
CARESCAPE ONE User Manual DRAFT 26 October 2017