GE CARESCAPE - Measuring auditory evoked potentials (AEP); Preparing the patient for AEP measurement

EEGandauditoryevokedpotentials
ProblemSolution
●Checkthenumberofchannels.
ThescreencongurationmaynotincludetheEEG
parameterwindow.
●Checkthemonitorsetup.
Whyarethenumericvaluesreplacedby---?Thepatienthashighmuscleactivityintheheadarea,
ornoisefromsomeinterferingequipmentiscoupling
toelectrodecables.
●Relaxthepatientandremovethesourceofnoise.
Whydotheelectrodeimpedancesshow---and
thereisamessagepromptingtochecktheground
electrode?
Thegroundelectrodeispoorlyconnectedtothe
patient,oritscableisnotconnectedtotheheadbox.
●Checktheelectrodeandcable.
Iftheimpedanceoftheelectrodeistoohigh,the
measurementfailseveniftheelectrodeisproperly
attached.
●Usebetterelectrodesorpreparetheskinbetter.
Whyaretheresomebaselineuctuations?Forinstance,sweatingmaycausevariationsinthe
electrodeimpedance.
●Incasetheuctuationisdisturbing,preparethe
skinandreplacetheelectrode.
Measuringauditoryevokedpotentials(AEP)
PreparingthepatientforAEPmeasurement
1.PreparethepatientandelectrodesasyouwouldforEEGmeasurement.
2.Connecttheleadsetandelectrodes.
3.Connectearphonestotheheadboxandplacethemonthepatient'sear/s.
NOTE
Makesurethattheearphonesdonotpressthepatient's
headinanyposition(forexample,whenthepatientis
lyingononeside).
NOTE
UseonlyGEHealthcaresuppliedheadphones/earphones.
Inotherheadphones/earphonesthesensitivitymayvary
causingtoohighanintensity,whichmaydamagetheear,
ortoolowanintensity,whichmaycauseapoorresponse.
2062971-001CARESCAPEModularMonitors387