maxium® smart C Electrosurgery Unit with maxium® smart Beam
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Revision 1
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In case of increased concentrations of oxygen and/or nitrous oxide in the area of the operation field,
special care must be taken.
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Remove bubbles of pyrolysis and electrolysis gas in body cavities by appropriate irrigation to avoid
formation of significant accumulations.
5.4
Risks from High Voltage
Danger of neuromuscular stimulation!
The application of a current with high voltage, and in particular of a monopolar high voltage coagulation
current, may cause neuromuscular stimulation in the patient.
Electrosurgery units are designed to generate high electrical voltages. In particular, some monopolar
coagulation currents, as well as the argon beamer coagulation, have especially high voltages of several
thousand volts. Not every electrosurgical instrument is suitable for such high voltages. In particular
endoscopic HF accessories, often of very delicate design, quickly reach their limits here. Therefore in
section 11 “Currents, their Properties and Technical Data”, page 68, the HF output voltages for all currents
are specified as a function of the power setting. Make sure that the maximum voltage specified by the
manufacturer of the accessory is not exceeded!
During hemostasis using HF current via a compressor, in practice arcing of the surgical glove occurs
frequently at the point where the compressor is held.
The high voltage coagulation currents may cause corona discharges between the supply cable of the active
electrode and the skin of the patient or the surgeon, if the cable has direct contact with the skin. Slight
burns may result.
In the maxium® smart C, the mains voltage is separated from the patient connections by two insulating
barriers. These barriers may be bridged, however, if large quantities of liquid penetrate into the unit.
Bedewing by transport of the unit from a very cold to a warm environment will also affect the insulation
negatively.
For avoidance of risks associated with high electrical voltages, observe the following instructions:
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For HF coagulation, it is imperative to use insulated hemostatic compressors! Surgical gloves do not
represent a defined insulation.
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The power supply cables to monopolar active electrodes must not be laid over the patient nor across
the cables of other medical units attached to the patient.
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Set up the electrosurgery unit so that it cannot be sprayed or poured over with liquids. If any liquid has
entered the unit, it must be taken out of operation. It may be put back into operation only after a
safety inspection has been performed successfully.
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If the unit comes from a cold environment, first make sure that there is no condensation water
contained in the unit. To this purpose, allow the unit to warm up in active state at least for half an
hour.
