GE MAC 2000 Operator's Manual

Also see for MAC 2000: Operator's manual Service manual Reference guide

If Pace Enhance is enabled, the recorder reduces the pulse amplitude and expands its width to makepacer pulses easier to identify. The system records the pulse with the correct polarity, a width of 5 ms,and equal amplitude in all leads. Depending on the polarity of the pacer pulse in leads I and II, the pacerpulse in lead III may be suppressed. The following figure of an ECG recording with pacer pulses showsthe amplitude of the reverse current.7.4.2 Recording ECGs During DefibrillationNOTICEEQUIPMENT DAMAGEDamaged cables can cause mechanical problems.Before connecting the cable to the device, check it for signs of physical damage. Do notuse a damaged cable.For patient safety, use only the original GE Healthcare patient cable.WARNINGSHOCK HAZARDTouching the patient, electrodes, or leadwires during defibrillation can cause a shock.During defibrillation, do not touch the patient, the electrodes, or the leadwires.Observe all defibrillator safety information.This equipment is protected against the effects of cardiac defibrillator discharge to allow the ECG traceto return after defibrillation, as required by test standards.The patient signal input is defibrillation-proof; it is not necessary to remove the ECG electrodes beforedefibrillating the patient if non-polarizing electrodes are being used.When using stainless steel or silver electrodes, the defibrillator discharge current may cause theelectrodes to retain a residual charge, causing an electrode polarization or DC offset voltage. This blocksECG signal acquisition for several minutes. If polarizing electrodes are used, GE Healthcare recommendsthat you disconnect the leadwires from the patient before delivering the shock.To prevent polarization, GE Healthcare recommends the use of non-polarizing disposable electrodeswith defibrillation recover ratings as specified in AAMI EC12 3.2.2.4 (MMS PN 9623-105 Silver MacTrodes,MMS spec TP9623-003), which requires the polarization potential of an electrode pair not exceed 100mV five seconds after a defibrillation discharge.Operator Manual 7.4 Special Considerations2053535-002 Revision T MAC 2000 ECG Analysis System 78/198