Medtronic DBS Mode D'emploi page 31

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Additional EMI source examples: Conductive and inductive
Home appliances - Home appliances that are in good working order and properly
grounded do not usually produce enough electromagnetic interference (EMI) to interfere
with neurostimulator operation. However, items with magnets (eg, stereo speakers,
refrigerators, freezers, power tools) may cause the neurostimulator to switch on or off.
Occupational environments - Commercial electrical equipment (arc welders, induction
furnaces, resistance welders), communication equipment (microwave transmitters, linear
power amplifiers, high-power amateur transmitters), and high voltage power lines may
generate enough electromagnetic interference (EMI) to interfere with neurostimulator
operation if approached too closely.
Additional EMI source examples: Radiation
Radiation therapy - High-radiation sources should not be directed at the neurostimulator.
High-radiation exposure may temporarily interfere with neurostimulator operation and may
damage the neurostimulator. Damage may not be immediately apparent. To limit device
exposure, use appropriate shielding or other measures, such as making beam angle
adjustments to avoid the device.
Mechanical interference
Mechanical interference can be defined as interference that is caused by pressure waves
generated by vibrating transducers used in imaging (ie, diagnostic ultrasound) or surgical
procedures such as lithotripsy. The mechanical motion of the actual transducers may also
be a source of interference.
Diagnostic ultrasound - Diagnostic ultrasound poses no electrical interference problems
for the DBS System, however the transducer should not be placed directly over the
implanted neurostimulator.
Lithotripsy - Use of high output ultrasonic devices, such as an electrohydraulic
lithotriptor, is not recommended for patients with an implanted DBS System. While there
is no danger to the patient, exposure to high output ultrasonic frequencies may result in
damage to the neurostimulator circuitry. If lithotripsy must be used, do not focus the beam
within 15 cm (6 in) of the neurostimulator.
26 English Information for prescribers 2017-05-01