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ESU-X 300NT_EN B
18.04.2018
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b4
Plug for the equipotential connection
b5
Rotating regulator of the start delay of the bipolar
AUTO
coagulation (from instantaneous mode to 5sec max.)
b6
Rotating regulator of the acoustic signals intensity for the activation of the cut and
coagulation
Earth protection (inside)
Alternating current
Attention: read the user manual
GEISTER MEDIZINTECHNIK GMBH guarantees safety, reliability and performances of this unit only if
installation, recalibrations and repairs are carried out, using original spare parts, by personnel
authorized by GEISTER and if the unit is used in compliance with given instructions in an area that
meets all the applicable IEC or CEI requirements.
GEISTER is at disposal to supply, if requested, the electric diagrams and any further information
needed.
This manual must be kept where the unit is employed. Please read this entire manual carefully to become
familiar with each of the controls and features before making any attempt to use the equipment clinically and
ask it again in case missing.
If any questions arise regarding the information contained in this manual according to specific needs, please
contact the Manufacturer, directly or through the local distributor, before using the unit. In accordance with the
requirements of the European Directive for medical devices 93/42 CEE and with the procedures of Company
Quality System for the after-sale control of the production, the users are pleased to inform the Manufacturer
about every, even little, problem of this unit.
INTRODUCTION
In a biological tissue crossed by the electric current, three effects are usually generated: Thermal, Faradic, and
Electrolytic.
By using high frequency electric current, higher than 300kHz, the faradic effect is almost completely eliminated,
while the electrolytic one is kept, even if with no practical result. So, the most used is the thermal one. When an
electric current having such characteristics crosses with sufficient density the cellular liquid of the tissues, it warms
it and generates what follows:
1) a heating, which is so rapid that the vapour pressure into the cells breaks their membranes and provokes their
division (
pure cut
);
2) a heating, which is slower, and which permits to the liquid to evaporate very slowly; in this way, the coagulating
parts of the tissues can coagulate (
coagulation
);
3) a process which is in the middle between the two phenomena described above (
coagulating cut
).
The use of the HF current presents also some risks that must be known, because their possible reduction depends
also on users’ behaviour:
-
undesired burns on the patient tissues (i.e. where the neutral electrode is placed because of non homogeneous
/ insufficient contact, or in any other zone because of anomalous contacts/use of water mattresses / contacts
of patient with the metallic parts of the operating table);
-
undesired burns on the operator tissues (i.e. into the hand, because of an insulation leakage into the
coagulation monopolar forceps);
-
interferences with the functioning of other equipments (i.e. video systems) or implanted devices (pace-makers);
-
slight neuromuscular stimulations, notably with coagulation currents, both in the contact point of the
active electrode and in the contact point of the neutral electrode. These stimulations are felt by patients
as “electrical discharges”.
DIRECTION FOR USE
In the field of normal electro-surgery, with only the High Frequency currents, the ESU-X 300NT allows to perform
all kinds of Monopolar Cut (Pure or Coagulating), Monopolar Coagulation (at low, medium, and high voltage),
Bipolar Cut (Pure or Coagulating), Bipolar Coagulation (Micro, Macro,etc.), during major and medium surgery
interventions into the operating theatre (open sky surgery, minimum invasive surgery, endoscopic surgery), or in
any other similar place. The application medical fields of this model are the following ones:
Apparatus of Class I Type CF, protected against the defibrillator effects (a CF type unit guarantees the highest safety level against
direct and indirect contacts, notably for the allowable leakage currents). The applied part type F (floating) is protected from the
earth at high and low frequencies. This kind of unit is especially indicated for direct heart application.
