Nucleus ESPrit 3G, Руководство пользователя

Страница: 40 / 48

Warnings and Precautions
ESPrit 3G User Guide
♦
39
Nucleus
®
22 cochlear implants do not have a removable
magnet. For patients with one of these implants MRI is
contraindicated and they should not be allowed to enter
a room where an MRI scanner is located.
To check that the patient has a Nucleus cochlear
implant with a removable magnet, the physician should
use an X-ray to check the radiopaque lettering on the
implant. There are three platinum letters printed on each
implant. If the middle letter is a ‘C’, ‘H’, ‘J’, ‘L’, ‘P’ or ‘T’
the implant has a removable magnet.
If the cochlear implant magnet is in place, it must be
removed surgically before the patient undergoes an
MRI procedure as tissue damage may occur if the
recipient is exposed to MRI. Once the magnet has been
removed, MRI can be performed. The patient must take
off the speech processor and headset before entering a
room where an MRI scanner is located.
Once the magnet is surgically removed, the quality of
MRI will be affected by the metal in the cochlear
implant. Image shadowing may extend as far as 6 cm
(~ 2 ½ in.) from the implant, thereby resulting in loss of
diagnostic information in the vicinity of the implant.
If you require additional information about removal of
the magnet, please contact Cochlear.
Loss of Residual Hearing
Insertion of the electrode into the cochlea will result in
complete loss of residual hearing in the implanted ear.
N94722F ISS2 body d02 MAS.p65 1/7/02, 3:23 PM 39