GE CARESCAPE - Gas exchange practicalities

Gasexchange
Injury,infection
Anxiety
Fever
Workofbreathing
Thermogeniceffect
%abovepredictedenergyexpenditure
Gasexchangepracticalities
Asteadystateconditionshouldbepresenttoensurethatthegasexchange
measurementisequivalenttothetissuegasexchange.Inaddition,different
physiologicalfactorsmayaffectthestabilityofthepatient:achangeinthebreathing
pattern,lungvolume,deadspaceorcirculatorystatusinducesanabruptchange
intheinspiratoryandexpiratorygasconcentrations.Thesefactorsalsodetermine
howfastthemeasurementstabilizes.Thepatientshouldbemotionlessandwith
consistentrespiratoryratesandvolumes.
Althoughgasexchangecanbemeasuredoverashortperiodoftime,aperiodofat
least20to30minutesispreferable.Byprolongingthemeasurementperiod,more
validinformationontheaveragegasexchangecanbeobtained.
Severalvariablescancontributetoinaccurateinformation.Toensurecorrect
measurement,keepthesepracticalconsiderationsinmind:
●Samplingline.
￭Toensurecorrectmoduleinitialization,alwaysconnectthesamplinglineand
theD-fendtothemodulebeforeturningonthemonitororconnectingthe
moduletoamonitorthatisalreadyon.
￭Useacorrectsamplinglinelength.Samplinglinesrequirespeciclengthsand
diametersforaccuratereportingofgasandow.GErecommendsusingonlya
2-m(7-ft)samplingline.
●Freetubingwithnoobstructions.
￭Checkthatthereisnowater(activehumidity,secretions)orkinkedtubingina
line.
●Measurementcalibrationandaccuracy.
￭Toensuremeasurementaccuracy,checktheaccuracyofairwaygas
measurementonceamonth.
￭Makesureyouareusingcorrectcalibrationgas.
￭Ensurethatthecalibrationgasandregulatorarefunctioningproperlybefore
calibration.Donotwashordisinfectcalibrationgassamplinglines.
346CARESCAPEModularMonitors2062971-001