Operation Preparations
4-6
C2: Fourth intercostals space at left border of sternum
C3: Middle of C2 and C4
C4: Fifth intercostals space on left midclavicular line
C5: Left anterior axillary line at the horizontal level of C4
C6: Left midaxillary line at the horizontal level of C4
Figure 4-6 Positions of chest electrodes
3) Connect chest electrodes:
a) Ensure the electrodes to be clean firstly;
b) Align all lead wires of patient cable to avoid twisting, and connect the associated electrode
connectors with corresponding electrodes according to the color and identifier;
c) Clean electrode area on chest surface with alcohol;
d) Daub the round area of 25mm diameter on each electrode site with conductive gel evenly;
e) Place a small amount of conductive gel the brim of chest electrode‟s metal cup;
f) Place the electrode on chest electrode site and squeeze the suction bulb. Unclench it and then the
electrode is adsorbed on chest. Attach all chest electrodes in the same way.
Do not daub too much conductive gel and the layer should be separated, otherwise it may cause
short circuit between electrodes and the errors of the ECG signal record.
4.5 Inspection before Power on
Before using the electrocardiograph please read the user manual carefully to be familiar with the performance
of the equipment, the operation methods must be mastered and the cautions and warnings; following
inspection procedures are recommended before power on.
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