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1. (WO2019050589) SHIFTING BURR CAP ASSEMBLY
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WHAT IS CLAIMED IS:

1. An implantable medical device comprising:

a burr cap assembly configured to be positioned at least partially within a burr hole in a cranium of a patient, the burr cap assembly defining a cavity and being configured to enable implantation of at least a portion of an implantable medical elongate member into a brain of the patient through the burr cap assembly, the burr cap assembly including a member positioned within the cavity of the burr cap and defining at least one opening to enable passage of at least a portion of the implantable medical elongate member into the brain of the patient, the member being configured to move within the cavity relative to the burr cap within at least one dimension of a plane that is substantially perpendicular to a longitudinal axis of at least a portion of the implantable medical elongate member.

2. The implantable medical device of claim 1, wherein the member is a first member, the burr cap assembly comprising a second member that defines the cavity, wherein the second member is configured to be positioned at least partially within the cranium of the patient when the burr cap assembly is positioned at least partially within the burr hole.

3. The implantable medical device of claim 1, wherein the member is a first member, the burr cap assembly comprising a second member that defines the cavity, wherein the second member is configured to be positioned at least partially above the cranium of the patient when the burr cap assembly is positioned at least partially within the burr hole.

4. The implantable medical device of claim 1, wherein the member is a first member, the burr cap assembly comprising a second member that defines the cavity, wherein the second member includes a top portion and a bottom portion that define a planar channel for movement of the first member within the cavity.

5. The implantable medical device of claim 1, wherein the member is configured to move within the cavity in response to a first force applied to the member by the implantable medical elongate member following implantation of the at least a portion of the implantable elongate member in the brain of the patient.

6. The implantable medical device of claim 5, wherein the first force is applied to the member in response to a second force applied to the implantable medical elongate member by fluids of the brain of the patient following implantation of the at least a portion of the implantable elongate member in the brain of the patient.

7. The implantable medical device of any of claims 1-6, wherein the member includes a substantially circular plate.

8. The implantable medical device of any of claims 1-7, wherein the burr cap assembly defines the cavity to substantially restrict movement of the member in a direction substantially parallel to the longitudinal axis of at least a portion of the implantable medical elongate member.

9. The implantable medical device of any of claims 1-8, wherein the opening is configured to substantially restrict relative movement between the member and a portion of the implantable medical elongate member extending through the opening defined by the member in a direction substantially perpendicular to the longitudinal axis of the at least a portion of the implantable medical elongate member.

10. The implantable medical device of any of claims 1-9, wherein the burr cap assembly is sized to receive a slack portion of the implantable medical elongate member.

11. The implantable medical device of claim 2, wherein the cavity is substantially cylindrical.

12. The implantable medical device of any of claims 1-11, wherein the member is configured to move within the cavity relative to the burr cap assembly within two dimensions of the plane.

13. An implantable medical device comprising:

a burr cap assembly configured to be positioned at least partially within a burr hole in a cranium of a patient, the burr cap assembly defining a cavity, the burr cap assembly including a member positioned within the cavity of the burr cap assembly and defining at least one opening, the member being configured to move within the cavity relative to the burr cap assembly within at least one dimension of a plane that is substantially perpendicular to a longitudinal axis of at least a portion of the implantable medical elongate member; and

an implantable medical elongate member, wherein at least a portion of the implantable medical elongate member is configured to be implanted into a brain of the patient through both the burr cap assembly and the at least one opening of the member, wherein the burr cap assembly comprises a cover configured to retain the implantable medical elongate member as the implantable medical elongate member enters the burr cap assembly, the cover configured to substantially seal the burr cap.

14. The implantable medical device of claim 13, wherein the member is a first member, the burr cap assembly comprising a second member that defines the cavity, wherein the second member is configured to be positioned at least partially within the cranium of the patient when the burr cap assembly is positioned at least partially within the burr hole.

15. The implantable medical device of claim 13, wherein the member is a first member, the burr cap assembly comprising a second member that defines the cavity, wherein the second member is configured to be positioned at least partially above the cranium of the patient when the burr cap assembly is positioned at least partially within the burr hole.

16. The implantable medical device of any of claims 13-15, wherein the member is configured to move within the cavity in response to a first force applied to the member by the implantable medical elongate member following implantation of the at least a portion of the implantable medical elongate member in the brain of the patient.

17. The implantable medical device of claim 16, wherein the first force is applied to the member in response to a second force applied to the implantable medical elongate member by fluids of the brain of the patient following implantation of the at least a portion of the implantable medical elongate member in the brain of the patient.

18. The implantable medical device of any of claims 13-17, wherein the burr cap assembly defines the cavity to substantially restrict movement of the member in a direction substantially parallel to the longitudinal axis of the at least a portion of the implantable medical elongate member.

19. The implantable medical device of any of claims 13-18, wherein the opening is configured to substantially restrict relative movement between the member and a portion of the implantable medical elongate member extending through the opening defined by the member in a direction substantially perpendicular to the longitudinal axis of the at least a portion of the implantable medical elongate member.

20. The implantable medical device of any of claims 13-19, wherein the burr cap assembly is sized to receive a slack portion of the implantable medical elongate member.

21. The implantable medical device of any of claims 13-20, wherein the member is configured to move within the cavity relative to the burr cap assembly within two dimensions of the plane.