EXPANDABLE PARENCHYMAL BOLT

摘要

A low profile parenchymal bolt having a cap, a body, and a base with a threaded screw located through the cap that engages a threaded shaft anchored to the base. Rotating the screw into the threaded shaft causes the base to move towards the cap compressing the body and causing its outer diameter to increase into contact with an opening in the skull of a patient to form a fluid-tight seal. An off-center lumen is formed through the cap, body, and base, and moving the base toward the cap also causes the body to decrease the size of the lumen thus clamping an instrument mounted through the lumen in place in the bolt and therefore, the skull of the patient.