What is the percentage of failure for deep brain stimulation?

This is again a very common question for people who are considering DBS, and if you are selected, we pick the participants very carefully. Usually, we achieve a very high success rate, meaning that they feel it is a very great help to them and they will even recommend it to their friends with Parkinson's disease. I think in terms of failure, taking in mind the complications we expect, there is a risk of serious complication about 1% and a risk of infection about 3%.