Maybe I can now answer my own question, as I have got quite fond of the DBS Vercise from Boston Scientific, it being very effective at reducing my tremor, admittedly at the expense of other symptoms - notably Blepharospasm, which makes my life very dependant on others.
More complcated is the differing advice, which could bring on an interesting conflict between surgeons following...I have a small growth on the side of my nose which I gather is best removed, using diathermy. Looking this up in the Boston Scientific handbook and then on the internet it is noted that if DBS is in place there is a serious contraindication with diathermy, on one hand the DBS surgeon has said that short bursts of bipolar diathermy would be possible, with the stimulator turned off - and on the other page 7 of the Vercise Patient Manual gives very clear instructions that nobody with the DBS system in place should have any form of diathermy. "The energy generated by diathermy can be transferred to the Vercise DBS System, causing tissue damage in the brain, which can result in severe injury or death." In addition, "the stimulator, whether it is turned on or off, may be critically damaged by the use of diathermy." (page 8). Medtronic's advice is clear, saying that there are two people in comas as a result of combining the two technologies.