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Chapter 2. System Configuration
2- 3 ECG Electrodes Connection
ECG cable consists of two parts: main cable that is connected to the device and lead wires that
are connected to the patient
Use only one type of electrode on the same patient to avoid
variations in electrical impedance. It is recommended to use
silver/silver chloride electrode. When dissimilar metals are used for
different electrodes, the electrodes may cause large offset potentials
due to polarization, which may be severe enough to prevent
obtaining an ECG trace. Using dissimilar metals may also increase
recovery time after defibrillation.
When you connect the cables and electrodes, make sure that no
metal part is in contact with the safety ground. Verify that all ECG
electrodes are correctly attached to the patient.
Interference from a non-grounded instrument near the patient
and/or ESU (Electrosurgical Unit) interference can cause inaccuracy
of ECG waveform.
Use only the manufacturer recommended ECG cable with
internal 10K resistance. Other ECG cables and leads may cause
improper performance and/or provide inadequate protection during
defibrillation.
Use disposable electrodes when the device is used in the vicinity
of electrosurgical unit or defibrillator.
When the device is used with electrocautery unit, please note the
position of leads. In order to reduce the hazard of burns, the leads
should be located away from the electrocautery pen and return
electrode .
Use intact and clean electrodes only. Electrodes with damaged
surface may cause ECG waveform inaccuracy.
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