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3.3 Sensor Placement and Connection
3.3.1 ECG Cable Connection
ECG measurement is to collect the ECG signal via the ECG electrodes. Electrode connects the
patient and the lead. The lead connects the monitor. The locations of the electrodes are very
important for obtaining accurate ECG signals.
1. Connect the cable to the right-panel connector marked with the ECG icon.
2. Select electrodes to be used. Use only one type of electrode on the same patient to avoid
variations in electrical resistance. For ECG monitoring, it is strongly recommended to use
silver/silver chloride electrodes. When dissimilar metals are used for different electrodes,
the electrodes may be subject to large offset potentials due to polarization. Using
dissimilar metals may also increase recovery time after defibrillation.
3. Prepare the electrode sites according to the electrode manufacturer’s instructions.
The locations of the electrode are in the following Figure:
Figure 3.3 Electrode Location
Note:
If skin rash or other unusual symptoms develop, remove electrodes from patient.
4. After starting the monitor, if the electrodes become loose or disconnected during
monitoring, the system will display “
LEAD OFF
” on the screen to alarm the operator.
It might not display ECG wave with 3 leads. The 5 leads should be used to
have ECG wave.
5. The ECG leads and their corresponding locations are as follows:
Symbol
Position
RA
The intersection between the centerline of the right
clavicle and Rib 2
LA
The intersection between the centerline of the left
clavicle and Rib 2
LL
Left part of the upper abdomen
RL
Right part of the upper abdomen
C1(V1)
C (V)
Chest
C2(V2)