Burr-hole ring-cap and electrode anchoring device. Technical note.

A new burr-hole ring and cap are described. The threaded ring is C-shaped, holding itself in the burr hole by elastic recoil. A ventricular catheter or deep brain electrode may be passed through the slotted ring and anchored in place by means of a mushroom-shaped silicone rubber cap. The cap fills, sealing the plug. This simple two-part device, originally designed for use with a deep brain stimulator system, may also be used as a standard 5/8-inch. (16 mm) burr-hole plug.