Linda, an implant shouldn't cause that kind of problem in the radio. If they
are, its time to see your team about serious rf leakage. Someone with a field
strength meter could easily check that out for you.
As an audiologist, I've never seen such a thing althought I certainly wouldn't
say its impossible.
Tom
Tom Brennan KD5VIJ, CCC-A/SLP
web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html