Shenzhen PM-9000 Express Manual del operador descargar pdf (Pagina 143)

11.2.2.3 Lead Placement for Surgical Patients

Lead placement during surgery is dependent on the type of surgery being performed. For

example, with open chest surgery, the leads might be placed laterally on the chest or on the

back. In the operating room, artifact can sometimes affect the ECG waveform due to the use

of electrosurgery equipment. To help reduce this, place the leads on the right and left

shoulders, the right and left sides near the stomach, and place the chest lead on the left side at

mid-chest. Avoid placing the leads on the upper arms. This will cause the ECG waveform to

be too small.

WARNING

•

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.

•

When using Electrosurgery equipment, never place the ECG leads near the

grounding plate of the Electrosurgery device. This will cause a great deal of

interference with the ECG signal.

11.2.2.4 Characteristics of Quality ECG Signal

As shown in Figure 11-5, 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 11-5 Standard ECG Waveform

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Shenzhen PM-9000 Express Manual del operador Pagina 143