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Having medical examinations?

Some medical procedures may affect your cochlear implant, which is why you should always remove the external part of your system before undergoing any examination. CT scans, X-rays and ultrasounds do not present any risk to your implant. However, if you are to undergo an MRI scan, diathermy, electrotherapy, electrosurgery or electroconvulsive therapy, please read the information below.

Before undergoing any examination, you should always remove the external part of your implant system.

CT scans, X-rays

These examinations present no risk to you or your implant.

MRI - Magnetic Resonance Imaging

MRI examinations or any strong magnetic field near the implant can damage the implant or harm the patient. However, studies have clearly shown that with the magnet removed the Neuro cochlear implant system is compatible with MRI examinations at a high intensity of 3 Tesla. When undergoing this type of examination, the magnet should be removed and replaced by a dummy magnet. At an intensity of 1.5 Tesla, it is not necessary to remove the magnet.

You have a Neuro cochlear implant and are to undergo any type of MRI examination, it is recommended that you read the following guide Neuro Zti - MRI exam instructions for use.

Note: The Digisonic® SP cochlear implant system is compatible with 1.5 Tesla MRI examinations without the magnet removed. This gives a good quality imaging, without demagnetising the implant. Recommendations on MRI examinations and the Digisonic® SP system can be found by reading Digisonic® SP – MRI recommendations.

Before undergoing any MRI examination with any type of cochlear implant, an MRI examination form must be filled out by your radiologist. Download the MRI form.


Medical diathermy using ultrasound cannot be used on the head and neck as the high currents can damage the cochlear tissue or the implant. However, diathermy can be carried out on other parts of the body with no effect on the cochlear implant.


High-voltage electrotherapy techniques should never be used on people with a cochlear implant as they can damage the implant system. However, low-voltage electrotherapy may be suitable if the electrodes are not placed in areas near the head or neck.

Electroconvulsive therapy

Electroconvulsive therapy is not suitable for people with a cochlear implant as it can damage the cochlear tissue or the implant.


People with a cochlear implant should never have defibrillation as it can damage the cochlear tissue or the implant. In a life-threatening situation, only the medical team can decide whether defibrillation is a suitable option.


Neurostimulation should never be applied directly over the cochlear implant as high currents induced into the electrode array can damage the cochlear tissue or the implant.

Ultrasound diagnostic tests or treatment

The implant should not be exposed to therapeutic levels of ultrasonic energy as this could damage the implant.

Ionising radiation

Ionising therapy up to 112 Grays can be used over the implant.
For further information on medical examinations, please read the Neuro Zti implant Instructions for use.

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