GE MAC 2000 Service Manual

Introduction
Whenusingstainlesssteelorsilverelectrodes,adebrillatordischargecurrentmay
causetheelectrodestoretainaresidualchargecausingapolarizationorDCoffset
voltage.ThiselectrodepolarizationblocksacquisitionoftheECGsignal.Toavoidthis
condition,ifthereisasituationwhereadebrillationproceduremightbenecessary,
usenon-polarizingelectrodes(whichdonotformaDCoffsetvoltagewhensubjected
toaDCcurrent)suchassilver/silver-chloridetypes.
Ifyouusepolarizingelectrodes,GEHealthcarerecommendsdisconnectingthe
leadwiresfromthepatientbeforedeliveringtheshock.
ElectrodedebrillationrecoveryistheabilityoftheelectrodetoallowtheECGtraceto
returnafterdebrillation.GEHealthcarerecommendsusingnon-polarizingdisposable
electrodeswithdebrillationrecoveryratingsasspeciedinAAMIEC125.2.2.4.AAMI
EC12requiresthatthepolarizationpotentialofanelectrodepairdoesnotexceed100
mV5secondsafteradebrillationdischarge.
Refertothesuppliesandaccessoriesreferenceguideforthissystemforalistof
approvedelectrodes.
AccuracyofInputSignalReproduction
•OverallSystemErrormeetsAAMIEC113.2.7.1requirements.OverallSystemErroris
betweenorwithin±5%or±40µV,whicheverisgreater.
•FrequencyResponsemeetsAAMIEC113.2.7.2requirements,usingtestingmethods
AandD.Frequencyresponseisbetweenorwithin±10%between0.67and40Hz
andbetween+0and-10%for20ms,1.5mVtriangularinput.
ModulatingEffectsinDigitalSystems
Thisdeviceusesdigitalsamplingtechniquesthatmayproducesomevariationin
amplitudesofQ,R,and/orSwavesfromoneheartbeattothenext,whichmaybe
particularlynoticeableinpediatricrecordings.Ifyouobservethisphenomenon,
beawarethattheoriginofamplitudevariationsisnotentirelyphysiological.For
measuringvoltagesofQ,R,andSwaves,GEHealthcareadvisesusingtheQRS
complexeswiththelargestdeectionoftheparticularwaves.
EMI/EMC/RFSafetyInformation
Thissystemisdesignedandtestedtocomplywithapplicableregulationsregarding
EMCandmustbeinstalledandputintoserviceaccordingtotheEMCinformation
statedintheElectromagneticCompatibilityappendixoftheServiceand/orOperator’s
manual.ChangesormodicationstothissystemnotexpresslyapprovedbyGE
HealthcarecouldcauseEMCissueswiththisorotherequipment.
Beforeinstallingorusingthedeviceorsystem,beawareoftheproximityofknownRF
sources,suchasthefollowing:
•RadioandTVstations
•PortableandmobileRFcommunicationdevices(cellphones,two-wayradios)
•X-ray,CT,orMRIdevices
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MAC™2000ECGAnalysisSystem
2053535-003C

GE MAC 2000 Specifications

General

ECG Type	Resting ECG
Number of Channels	12
Report Format	PDF, XML
Battery Type	Rechargeable lithium-ion
Connectivity	Ethernet
Data Storage	Internal memory
Display	High-resolution color LCD
Power Supply	Universal AC power supply