Implantable medical device with compressible fixation member

• US 8,676,319 B2
• Filed: 10/29/2010
• Issued: 03/18/2014
• Est. Priority Date: 10/29/2010
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Knoll, Randall L.
• Primary Examiner(s): Stoklosa, Joseph
• Assistant Examiner(s): PHAM, MINH DUC GIA
• Application Number:
  US12/915,935
• Publication Number:
  US 20120109272A1
• Time in Patent Office: 1,236 Days
• Field of Search: 607 36- 38
• US Class Current: 607/36
• CPC Class Codes: A61N 1/37516 Intravascular implants
• CPC Class Codes: A61N 1/37518 Anchoring of the implants, e.g. fixation

Abstract

An implantable medical device and method of implanting a medical device, the device including a housing surrounding an operative component and a resiliently deformable fixation member. The fixation member includes a ring shaped annulus circumscribing the housing and a plurality of elongated struts having a proximal end affixed to the housing and a distal end affixed to the annulus. The fixation member may be comprised of a hydrogel such that it may be in a smaller, dehydrated form during implantation, and then may absorb fluid to expand to a larger, hydrated form after insertion to engage the surrounding tissue.

Claims

1. An implantable medical device comprising:

an operative component and a housing surrounding the operative component;

a resiliently deformable fixation member for supporting the housing, the fixation member comprising;

a ring shaped annulus circumscribing the housing;

a plurality of elongated struts having a proximal end affixed to the housing and a distal end affixed to the annulus; and

wherein the resiliently deformable fixation member is comprised of a hydrogel; and

wherein the struts are curved in shape between the proximal and distal ends; and

wherein the struts are spaced in pairs with each strut curving away from the other of its pair between their proximal and distal ends in a circumferential direction.

2. An implantable medical device comprising:

an operative component and a housing surrounding the operative component;

a resiliently deformable fixation member for supporting the housing, the fixation member comprising;

a ring shaped annulus circumscribing the housing;

a plurality of elongated struts having a proximal end affixed to the housing and a distal end affixed to the annulus; and

wherein the resiliently deformable fixation member is comprised of a hydrogel; and

wherein the struts are curved in shape between the proximal and distal ends; and

wherein the struts are all curved in the same circumferential direction.

3. The implantable medical device of claim 2 wherein the struts are approximately evenly spaced around the housing.