Low profile apparatus for securing a therapy delivery device within a burr hole

Abstract

Apparatus for securing a therapy delivery device relative to a burr hole. In one embodiment, the apparatus includes a base that is securable to bone, without the use of fasteners, either before or after insertion of the therapy delivery device into the burr hole. The base may frictionally engage the delivery device, e.g., receive it with interference, to secure the device relative to the burr hole. The base may have a relatively low profile such that a flange portion of the base extends only minimally above a cranial surface, e.g., about 4 millimeters or less.

Description

[0001] This application claims the benefit of: U.S. Provisional Application No. 60 / 544,456, filed 13 Feb. 2004; U.S. Provisional Application No. 60 / 563,787, filed 20 Apr. 2004; U.S. Provisional Application No. 60 / 587,356, filed 13 Jul. 2004; and U.S. Provisional Application No. 60 / 602,749, filed 19 Aug. 2004, all of which are incorporated herein by reference in their respective entireties. RELATED APPLICATIONS [0002] This application is related to the following applications, all of which share a filing date with the present application and all of which are incorporated herein by reference in their respective entireties: [0003] U.S. Application Ser. No.______, Attorney Docket No. 134.02080101, entitled METHODS AND APPARATUS FOR SECURING A THERAPY DELIVERY DEVICE WITHIN A BURR HOLE; [0004] PCT. No.______, Attorney Docket No. P-22168.01, entitled METHODS AND APPARATUS FOR SECURING A THERAPY DELIVERY DEVICE WITHIN A BURR HOLE; [0005] U.S. Application Ser. No.______, Attorney Docket No. ...

AI Technical Summary

Benefits of technology

[0013] One aspect of the above-listed procedures, and of any other such procedures that involve instrument access to the brain through a burr hole, is the precision with which any such inserted devices, e.g., catheters and leads, are placed. Once a satisfactory burr hole is established at a particular site, to avoid unintended injury to the brain, physicians typically use stereotactic procedures to position the inserted devices. One stereotactic instrument which may be used, for example, to position a lead electrode is disclosed in U.S. Pat. No. 4,350,159 to Gouda. As can be appreciated, once an inserted device is properly positioned, it is important that the device not be moved. Even one millimeter of travel of the positioned device may cause unsatisfactory results or, in some cases, potential injury to the brain. Accordingly, reliable methods and apparatus for fixing the positioned device at the burr hole are beneficial.

Problems solved by technology

Even one millimeter of travel of the positioned device may cause unsatisfactory results or, in some cases, potential injury to the brain.

That arrangement involved securing the lead off-center from the burr hole in a manner such that, during installation of the anchoring cap, a stereotactic instrument could not be used to support the lead.

The lead was thus potentially susceptible to inadvertent movement by the physician during cap installation.

Further, the interaction of the cap and socket could pull on the lead and potentially result in movement or dislodgement of the same.

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