Patent ID: 7704260

Claim:
An apparatus comprising: a base hoop, sized and shaped to be disposed about a burr hole, the base hoop including an upper surface and a lower surface, the base hoop includes an access passage, the access passage extends between the upper surface and lower surface, the base hoop includes at least one hole sized and shaped for receiving a fastener therethrough to secure the base hoop; and a lid coupled to the base hoop, the lid includes at least one slot, the slot extends through the lid and includes at least one socket, the socket is sized and shaped to retain at least one instrument, the slot being defined by a first surface and a second surface of the lid, the first and second surfaces being separated at a first fixed distance apart from each other, the at least one instrument insertable between the first and second surfaces to be guided toward the socket, the first and second surfaces remaining separated at the first fixed distance apart from each other when the at least one instrument is retained in the socket, the first and second surfaces remaining separated at the first fixed distance apart from each other when the at least one instrument is absent from the socket.