Modular shield extender

Patent metadata

Field	Value
Publication number	US-9956420-B2
Application number	US-201715478187-A
Country	US
Kind code	B2
Filing date	Apr 3, 2017
Priority date	Oct 31, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

An implantable medical device (IMD) has a housing enclosing an electronic circuit. The housing includes a shield member defining a first portion of an interior cavity of the implantable medical device and a skirted feedthrough assembly. The feedthrough assembly includes a shield extender having a top face and a sidewall that extends from the top face so that the top face and the sidewall are a single continuous component. At least one feedthrough aperture extends through the top face.

First claim

The invention claimed is:

1. An implantable medical device, comprising:
an electronic circuit;
a shield member defining a first portion of an interior cavity of the implantable medical device;
a feedthrough assembly comprising:
a shield extender having a top face providing a top surface of the shield extender and a sidewall that extends from the top face so that the top face and the sidewall are a single continuous component wherein the top face comprises a contoured portion defining an outer surface of the implantable medical device,
at least one feedthrough aperture extending through the top surface provided by the top face,
an insulated feedthrough pin extending through the feedthrough aperture,
the sidewall having a bottom edge that defines an open side of the shield extender, the bottom edge coupled to the shield member,
the sidewall defining a second portion of the interior cavity, the second portion in communication with the first portion, the electronic circuit residing in the interior cavity,
the feedthrough pin being electrically coupled to the electronic circuit, the electronic circuit enclosed in the interior cavity.

2. The device of claim 1 , wherein the shield extender sidewall has an outer surface defining an exterior surface of the implantable medical device.

3. The device of claim 1 , wherein the shield extender sidewall comprises an inner surface defining a coupling member extending interiorly from the inner surface.

4. The device of claim 3 , wherein the coupling member defines an opening for receiving a fastener.

5. The device of claim 1 , wherein the shield extender sidewall defines a channel,
the shield extender further comprising a coupling member extending interiorly from the sidewall and accessible through the channel.

6. The device of claim 5 , wherein the electronic circuit is coupled to the coupling member.

7. The device of claim 5 , wherein the shield member comprises a sidewall having a longitudinal extension configured to mate with shield extender channel to enclose the second portion of the interior cavity.

8. The device of claim 1 , further comprising:
a connector block for receiving a medical lead coupled to the top face of the shield extender; and
a fixture along the top face of the shield extender for interfacing with the connector block.

9. The device of claim 8 , wherein the fixture comprises at least one of a rail, a stopping interface, and a groove.

10. An implantable medical device comprising a housing and an electronic circuit enclosed within the housing, the housing comprising:
a shield member defining a first portion of an interior cavity of the implantable medical device;
a skirted feedthrough assembly comprising:
a shield extender having a top face providing a top surface of the shield extender and a sidewall that extends from the top face so that the top face and the sidewall are a single continuous component wherein the top face comprises a contoured portion defining an outer surface of the implantable medical device,
at least one feedthrough aperture extending through the top surface provided by the top face,
an insulated feedthrough pin extending through the feedthrough aperture,
the sidewall having a bottom edge that defines an open side of the shield extender, the bottom edge coupled to the shield member,
the sidewall defining a second portion of the interior cavity, the second portion in communication with the first portion, and

a connector block for receiving a medical lead coupled to the top face of the shield extender.

11. The device of claim 10 , wherein the shield extender sidewall has an outer surface defining an exterior surface of the implantable medical device housing.

12. The device of claim 10 , wherein the shield extender sidewall comprises an inner surface defining a coupling member extending interiorly from the inner surface.

13. The device of claim 12 , wherein the coupling member defines an opening for receiving a fastener.

14. The device of claim 10 , wherein the shield extender sidewall defines a channel,
the shield extender further comprising a coupling member extending interiorly from the sidewall and accessible through the channel.

15. The device of claim 14 , wherein the electronic circuit is coupled to the coupling member.

16. The device of claim 14 , wherein the shield member comprises a sidewall having a longitudinal extension configured to mate with shield extender channel to enclose the second portion of the interior cavity.

17. The device of claim 10 , further comprising:
a fixture along the top face of the shield extender for interfacing with the connector block.

18. The device of claim 17 , wherein the fixture comprises at least one of a rail, a stopping interface, and a groove.

19. A method for assembling an implantable medical device comprising:
coupling a shield member to a shield extender having a top face providing a top surface of the shield extender and a sidewall that extends from the top face so that the top face and the sidewall are a single continuous component wherein the top face comprises a contoured portion defining an outer surface of the implantable medical device, the sidewall having a bottom edge that defines an open side of the shield extender, the bottom edge coupled to the shield member, the top face comprising at least one feedthrough aperture extending through the top surface,
the shield member defining a first portion of an interior cavity of the implantable medical device,

the sidewall defining a second portion of the interior cavity, the second portion in communication with the first portion, the electronic circuit residing in the interior cavity.

Assignees

• Medtronic Inc

Inventors

• Kast John E
• Johnson-Morke Linda M
• Paidosh Chris J
• Roles Randy S

Classifications

• A61N1/3754 Primary

  Feedthroughs · CPC title

• A61N1/375

  Constructional arrangements, e.g. casings · CPC title

• A61N1/3758

  Packaging of the components within the casing · CPC title