10-6
WARNING
z When using Electrosurgery equipment, patient leads should be placed in a
position that is equal distance from the Electrosurgery electrotome and the
grounding plate to avoid burns to the patient. The Electrosurgery equipment
wire and the ECG cable must be kept separated and not allowed to tangle.
z When using Electrosurgery equipment, never place the ECG electrodes near the
grounding plate of the Electrosurgery device. This will cause a great deal of
interference with the ECG signal.
10.2.3 Characteristics of Quality ECG Signal
As shown in Figure 10-4, the normal QRS complex should exhibit the following characteristics.
Tall and narrow with no notches.
With a tall R-wave completely above or below the baseline.
With a pacer spike no higher than the height of the R-wave.
With the T-wave less than one-third of the height of the R-wave.
With the P-wave much smaller than the T-wave.
Figure 10-4 Standard ECG Waveform
To display a 1-millivolt calibration pulse on the ECG wave, select the ECG CAL option in the
ECG SETUP menu. A message "when CAL, can't monitor!" is displayed on the screen.
NOTE
z If the ECG waveform is too small, or not accurate, and the electrodes are secure
and firmly attached to the patient, change the display to a different lead.
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