GE CARESCAPE - Page 321

CO2withCAPNOSTATMainstream,CapnoFlexLF,andDualCO2modules
ProblemSolution
Excessivesecretionsinsamplelines.●Replacethesamplelinesandairwayadapters.
Measurementisnotworking.Ifthesensorwithadapter(CAPNOSTATMainstream,
DualCO2)isnotpositionedupright,large
concentrationsofuidsonthewindowsofthe
adapterwillobstructgasanalysis.
●Checkthesensorandadapterpositioning.
Moduledoesnotwork.●Contactauthorizedservicepersonnel.
Readingsseeminaccurate.●Checkthatthegasexhaustlineisnotkinkedor
blocked.
●Checkthebreathingcircuitforpossibleleaks.
●CheckthattheAqua-KnotwatertrapinDualCO2
isnotoccluded.
Whycanweseedipsinthecapnogramduring
expiration?
Thedipsseeninthecapnogramduringexpiration
arerelatedtothesidestreamgassampling,the
continuousgasowtotheY-piece,andpatient’s
cardiaccontractions,whichcauseintra-thoracic
pressurechangesandthereforeowvariations.
WhyistheEtCO
2
valueconsiderablylowerthan
theCO
2
partialpressuredeterminedbybloodgas
analysis?
Themajorclinicalreasonsaredead-spaceventilation,
ventilation/perfusionmismatch,adropincardiac
output,alveolarshunts,andincompleteemptyingof
thealveoli.
●Alsochecktheintegrityofthebreathing
circuit;blood-gasanalysiscorrectedtoalower
temperatureincaseofhypothermia.
2062971-001CARESCAPEModularMonitors321