Saadat Dena 650, User Manual

Page: 44 / 101

Chapter 4: Patient preparation
33
Connection of theLimb Electrodes
4 electrodes of 10 ECG electrodes are attached to the limbs.
The location of the limb electrodes for the 12-lead ECG is as follows:

Left hand (L)

Right hand (R)

Left foot (F)

Righ foot (N)
WARNING

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.

Use intact and clean electrodes only. Electrodes with damaged surface may cause ECG
waveform inaccuracy.

Use only the manufacturer recommended ECG cable with internal resistance. Other ECG cables
and leads may cause burns, improper performance and/or provide inadequate protection during
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.

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.
..دنا هدش
Figure 4-2 Connection of the Limb Electrodes