My brother had an ELF procedure to remove scar tssue around the nerve at l4/l5 after previous open surgery.MRI clearly showed scar tissue in this area. Discogram also highlighted the problem. After the procedure, my brother was still in alot of pain and had quite a bad reaction with it all. The sciatic pain has never gone away and he is still hobbling around. He has had a further MRI scan and it shows pretty much as before, a hell of alot of scar tissue around the nerve at L4/L5, so it does nt seem to have achieved anything !! I have seen the scans and they seem to be exactly the same as pre-op to post op after 6 mnths His option is to have another go and pay for another ELF operation , but i am not to sure if he can afford another £10,400.Its a shame you cant get a reduction in price when the first one does nt work from the outset !!