Hi mate,
I don't know an awful lot about this technique. I think it might be termed neurablation.It sounds pretty drastic to me, & it really depends on how much your rellie is suffering & what he's had tired before. I don't imagine the success rate is that wonderful or we all would have been reading plenty about it. Perhaps if all else has failed & the only other option is a fusion, then it might be worth a shot.
I wonder if they might do better on a pain management programme? Perhaps your rellie is looking for a cure where one might not be available ? If I find out anything more I'll be back in touch.
Has he tried a Tens ?
Take care,....Billyboy