What are the risks of surgery?

The most serious potential risk of the surgical procedure is bleeding within the brain, producing a stroke. The risk varies from patient to patient, but it ranges from 1-3%. If a stroke or bleeding occurs, it is usually within a few hours of surgery. Another potential risk is infection, which occurs in ~5% of patients. If an infection occurs, it is usually not life threatening and easy identifiable, but may require immediate removal of the entire DBS system.