maxium® smart C Electrosurgery Unit with maxium® smart Beam
92
Revision 1
Duo Prep
If two monopolar patient circuits can be activated simultaneously via independent hand or foot switches,
the selected power of the generator feeding the circuits can be split between the two channels. The
corresponding technical standard (IEC 60601-2-2) provides this possibility only for coagulation currents
allowing contact-free application. To a certain extent such coagulation currents can also be used for tissue
preparation.
Duo Prep qualitatively corresponds to the Forced Prep current, with the difference that in addition to
individual activation there is also simultaneous activation of the monopolar outputs M1 and M2 possible.
This current can be used specifically in cases where one patient is to be operated upon at two different
surgical locations at the same time, for example in cardiac surgery (preparation of the crural vein with a low
coagulation component and simultaneous preparation of the mammaria in the thoracic area). Activation is
done via the blue switches (finger or foot).
If this current is selected for either of the coagulation channels of the M output ports, it will appear also on
the other output port. The power can be set only to the same value on both channels. If the current of one
channel is switched off or replaced by any other, the parallel channel will switch to “single version” Forced
Prep.
In case of individual activation of the currents, they behave like the Forced Prep current. In case of
synchronous activation, the power is split between the two outputs. Reasonable splitting of the power that
allows for simultaneous will, however, work only in non-contact mode.
Risk of injury from inadequate insulation!
In case of indirect application via a hand-held instrument, this should be insulated so as not to expose the
surgeon to the HF voltage transmitted directly from the active electrode to the instrument. It must be
kept in mind that the surgical glove is no defined electrical insulation for this current, and arcing is indeed
likely.
Active accessories to be used with this current must be able to withstand an HF voltage of at least 2,000 V
(depending on the selected effect).
Risk of injury from excessive power!
The output power of the active electrodes may change during use, due to switching on or off of the
parallel patient output port or unbalanced and varying application conditions!
