Bovie AARON 2250 Service Manual page 65

Situation
Interference with other devices
only when generator is
activated
Pacemaker interference
Abnormal neuromuscular
stimulation - stop surgery
immediately.
Blank or confusing LED display
Mode buttons do not operate
properly when pressed.
Ser vice Guide • Aaron 2250
Possible Cause
Electrically inconsistent ground wires
in the operating room
If interference continues when the
generator is activated, the monitor is
responding to radiated frequencies.
Intermittent connections or metal-to-
metal sparking
Current traveling from active to
return electrode during monopolar
electrosurgery is passing too
close to pacemaker.
Metal-to-metal sparking
Can occur during coagulation
Abnormal 50 Hz - 60 Hz leakage
currents
Display board malfunction
Damaged front panel overlay
Loose or disconnected internal cable
Power supply malfunction
Main board malfunction
Recommended Action
Verify that all ground wires are as short as
possible and go to the same grounded metal.
Check with the manufacturer of the monitor.
Some manufacturers offer choke filters for use in
monitor leads.
The filters reduce interference when the generator
is activated and minimize the potential for an
electrosurgical burn at the site of the monitor
electrode.
1. Check all connections to the generator.
2 It may be necessary to re-program the
pacemaker.
1. Use bipolar instruments, is possible. If you must
use a monopolar instrument, place the return
electrode as close as possible to the surgical
site.
2. Make sure the current path from the surgical
site to the return electrode does not pass
through the vicinity of the heart or the site where
the pacemaker is implanted.
3. Always monitor patients with pacemakers during
surgery and keep a defibrillator available.
4. Consult the pacemaker manufacturer or
hospital.
5. Contact the Cardiology Department for further
information when use of electrosurgical
appliances is planned on patients with cardiac
pacemakers.
Check all connections to the generator, patient
plate, and active electrodes.
Use a lower setting for the Fulguration mode or
select the Coagulation mode.
Inside the generator, carefully inspect for damage
that may cause shorting between the AC line
voltage and connected patient components.
Replace the display board.
Replace front panel overlay.
Check/connect overlay cable to display board.
Replace power supply.
Replace the main board.
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