Implantable pulse generator case
View Patent ↗An implantable medical device, e.g., a stimulator, having a sealed housing and method of making the same. An exemplary embodiment of the device includes a case frame defining a cavity, the cavity extending at least substantially through the case frame, which cavity may contain electronics or a power source, and at least one lid configured to be sealingly coupled to the case frame. A feedthru opening may also be included in the case frame.
1. A case assembly, comprising:
a case frame having a perimeter portion defining a cavity extending completely through said case frame and configured to contain at least one electronic component, said perimeter portion comprising a first outer surface and a second outer surface disposed opposite said first outer surface;
a feedthru opening defined in said case frame;
a feedthru member configured to fit within said feedthru opening, sealingly couple to said case frame, and electrically couple to said at least one electronic component;
a first recessed lid seat disposed in said first outer surface of said perimeter portion;
a second recessed lid seat disposed in said second outer surface of said perimeter portion;
a first side lid configured to fit within said first recessed lid seat and sealingly couple to said case frame; and
a second side lid configured to fit within said second recessed lid seat and sealingly couple to said case frame.
2. The assembly of claim 1 , wherein:
said first and second outer surfaces are substantially planar.
3. The assembly of claim 1 , wherein said feedthru member comprises:
a body including a circumferential flange; and
a plurality of electrically conductive pins extending through said body.
4. The assembly of claim 3 , wherein said feedthru opening comprises:
a lumen extending from an outer surface of said case frame to said cavity; and
a seat lip disposed within said lumen for seating a feedthru member.
5. The assembly of claim 1 , wherein said case frame comprises at least one of a titanium alloy, ceramic and plastic.
6. The assembly of claim 5 , wherein said case frame is a titanium alloy comprised of Ti 6 Al/4V.
7. The assembly of claim 1 , wherein said at least one side lid comprises one of a braze-able biocompatible material or a weldable biocompatible material.
8. The assembly of claim 1 , wherein said at least one side lid comprises one of a titanium alloy, a ceramic, or a polyetheretherketone (PEEK).
9. The assembly of claim 8 , wherein said ceramic material comprises high density alumina.
10. The assembly of claim 1 , further comprising:
a removable lead connector block, wherein the lead connector block is configured to be seated into a portion of the case frame;
a connector block cover that is movably connected to the case frame, and which connector block cover has an unlocked position and a locked position, wherein in the locked position the connector block cover secures the lead connector block to the case frame.
11. An implantable medical device comprising:
a power source;
pulse generating electronics coupled to said power source;
a case assembly including:
a case frame having a perimeter portion defining a cavity extending completely through said case frame and configured to contain said pulse generating electronics and said power source, said perimeter portion comprising a first outer surface and a second outer surface disposed opposite said first outer surface;
a feedthru opening defined in said case frame;
a feedthru member configured to fit within said feedthru opening, sealingly couple to said case frame, and electrically couple to said pulse generating electronics;
a first recessed lid seat disposed in said first outer surface of said perimeter portion;
a second recessed lid seat disposed in said second outer surface of said perimeter portion;
a first side lid configured to fit within said first recessed lid seat and sealingly couple to said case frame; and
a second side lid configured to fit within said second recessed lid seat and sealingly couple to said case frame.
12. The device of claim 11 , further comprising:
a removable lead connector block, wherein the lead connector block is configured to be seated into a portion of the case frame.
13. The device of claim 12 , further comprising:
a connector block cover that is movably connected to the case frame, which connector block cover has an unlocked position and a locked position, wherein in the locked position, the connector block cover secures the lead connector block to the case frame.
14. The device of claim 11 , wherein said power source comprises a replenishable power source.
15. The device of claim 11 , wherein said first and second surfaces are substantially planar.
16. The assembly of claim 1 , wherein said first and second side lids each have a thickness configured to minimize one or more effects of eddy current.
17. The assembly of claim 1 , wherein said case frame and said side lids are made of a machined material.
18. The device of claim 11 , wherein said first and second side lids each have a thickness configured to minimize one or more effects of eddy current.
19. The device of claim 11 , wherein said case frame and said side lids are made of a machined material.