Epidural Lysis of Adhesions is used to treat scar tissue that has formed in the epidural space from surgery or inflammation. While typically scar tissue follows surgical intervention, it may also develop as an inflammatory response, such as when a disc is chronically leaking from a tear in its outer wall (or annulus). Scar tissue is broken up and disrupted both mechanically through the direct insertion of the catheter, but also through hydrostatic pressure created by the injection of large volumes of fluid to distend the epidural space. The goal of this procedure is to break up this scar tissue and free up the nerve structure which is trapped within the scar tissue. This treatment is most commonly used to treat chronic leg pain following low back surgery.