The screw of volt/bolt for the skull and the volt/bolt for the skull which are locked to the skull of the patient being the volt/bolt for the skull which is locked to the skull of the mannered null patient who locks the volt/bolt for the skull in the interposition instrument in order to interpose the part which is cut

摘要

A cranial bolt (100) secured to a skull (102) of a patient includes a threaded portion (200) and a lumen portion (300). Threaded portion has an inner surface forming a central passageway (204) which extends throughout the threaded portion. The inner surface includes a connector (206) mating with the lumen portion. The threaded portion has an outer surface having a plurality of threads (210) for engaging a hole formed in the patient's skull. The lumen portion includes a stem portion (302) that enters the central passageway and engages the mating connector. A fluid tight seal is formed between the inner surface of the threaded portion and the stem portion. At least two lumens (312) are disposed through the stem portion and the base portion (310). The lumens have a proximal end opening outside the skull and a distal end opening inside the skull. One embodiment includes sensor lumens diverging from the centerline and another allows lumen portion to rotate independent of threaded portion. IMAGE