ES120 OPERATION MANUAL
IU ES120 2009-03-01 ENG.3.0
2.1. Monopolar operation
In the monopolar mode the HF current is delivered to the
tissue by the active electrode. The cutting or coagulation
effect results from the concentration of the high density
HF current on the small surface of the active electrode.
This causes the increase of temperature and evaporation
of water from the tissue in the direct vicinity of the active
electrode and eventually results in hemostasis and arrest
of bleeding, or cutting of tissue.
Subsequently the HF current flows to the surface of the neutral electrode where it is dispersed.
The density of the HF current decreases and no unintended thermal effect occurs at the spot
of the neutral electrode application. From the neutral electrode the HF current returns to the
diathermy unit.
2.2. Bipolar operation
When the device operates in the bipolar mode HF current
flows between two jaws of a bipolar instrument and
concentrates exclusively on the small area located between
them.
In the bipolar mode the dangerous flow of current through
the patient's body does not occur. The risk of burns
occurring outside the immediate surgical area is minimized.
Thus the bipolar coagulation mode is safer than the monopolar mode and is particularly
recommended for procedures involving patients with cardiac pacemakers or for procedures
performed on organs of small cross-section. In the bipolar mode, the neutral electrode is not
required.
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