FDA warns of magnetic interference involving hearing devices

The magnets in some hearing implants may interfere with the operation of programmable cerebrospinal fluid (CSF) shunt systems used to treat hydrocephalus, causing over- or under-drainage, the FDA warned yesterday.

Magnetic interactions between cochlear implants, bone-conduction hearing devices or middle-ear hearing devices implanted too closely to shunt systems may " lead to unintended changes to the programmable CSF shunt valve settings," the agency said in a statement.

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