Patent ID: 8308781

Claim:
A method of securing a cranial bolt to a skull of a patient, the method comprising: drilling a hole in the skull; inserting a self-tapping threaded portion into the hole, wherein the threaded portion includes an inner surface forming a central passageway, a mating connector supported on the inner surface, and an outer surface having a plurality of threads for engaging the hole; and engaging a lumen portion to the threaded portion, wherein the lumen portion includes a stem part entering the central passageway and engaging the mating connector, a base part of the lumen portion disposed on one end of the stem part opposite the skull, and at least two lumens disposed through the stem part and the base part and wherein a proximal end of the at least two lumens opens outside the skull and a distal end of the at least two lumens opens inside the skull, wherein the at least two lumens extend through the stem part and the base part at an angle from the centerline of the lumen portion, the centerline of the lumen extends through the base part and the stem part.