BURSA

A bursa is a closed fluid-filled sac that functions as a gliding surface to reduce friction between tissues of the body. When the bursa becomes inflamed, the condition is known to as "bursitis." Most commonly this is not an infectious condition ( aseptic bursitis ). When the bursa is infected with bacteria, the condition is called septic bursitis. Bypass : An operation in which the surgeon creates a new pathway for the movement of substances in the body.