Warning; Hires 90K Magnet Insert Dummy Specifications - Advanced Bionics HiRes 90K Handbuch

Magnetic Resonance Imaging (MRI) for
HiRes 90K and HiRes 90K aDVantaGE
STEP 1
MRI Use with the HiRes 90K Implant Family

Warning

The HiRes 90K implant family, with either the internal magnet removed or left in place, has been tested with
1.5 Tesla/64 MHz and 0.3 Tesla/12 MHz MRI systems. MRI is contraindicated except under the circumstances
described below. Do not allow patients with an implant from the HiRes 90K family to be in the area of an MRI
system unless:
The bandaging protocol recommended by Advanced Bionics (029-M486) is followed when the
•
patient undergoes an MRI procedure with the magnet left in place or,
the internal magnet is surgically removed and possibly replaced with the Magnet Insert Dummy
•
before the patient undergoes an MRI procedure.
The external sound processor and headpiece are removed before entering a room where an
•
MRI scanner is located.
MRI parameters should be selected to ensure a Specific Absorption Rate (SAR) of less than 1.0 W/kg in the
head region.
Patient should be monitored verbally and visually throughout the MRI procedure.
Image shadowing may extend as far as 70 cm
implant, resulting in loss of diagnostic information in the implant vicinity. The extent of the shadowing may be
minimized by adjusting the signal parameters.
For additional information regarding the use of MRI with the HiRes 90K implant family, please contact
Advanced Bionics Technical Support.
HiRes 90K Magnet Insert Dummy (CI-1410) Specifications
Material Titanium
Diameter 9 mm
Thickness 2.8 mm
note: The Magnet Insert Dummy is a sterile, single-use, non-reusable surgical tool.
note: In the EU, MRI Examination Request Form (029-M569) must be provided to Advanced Bionics
for review and approval prior to performing the MRI.
(without magnet) and 210 cm
2
Cochlear Implants
(with magnet) around the
2
2