Medical device fixation anchor suited for balloon expandable stents

• US 9,814,609 B2
• Filed: 06/17/2010
• Issued: 11/14/2017
• Est. Priority Date: 06/17/2009
• Status: Active Grant

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Inventors: Shaw, Edward E., Daugherty, John R.
• Primary Examiner(s): SCHALL, MATTHEW WAYNE
• Application Number:
  US12/817,234
• Publication Number:
  US 20100324665A1
• Time in Patent Office: 2,707 Days
• Field of Search: 623 115
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded

Abstract

A balloon expandable anchor for a medical device. The anchor barb is contained within the device compacted delivery profile and is balloon expanded to rest outside of the expanded device profile.

Claims

1. A medical device, comprising:

an expandable body configured to be deployed in a body of a patient, having an inner lumen, and configured to transition from a first compacted profile to a second expanded profile upon application of an extrinsic expansion force to the expandable body, the first compacted profile including the inner lumen defining an inner boundary of the expandable body;

an expandable anchor having a device attachment portion directly coupled to a tubular body, a barb portion, and an expansion bearing portion positioned between the device attachment portion and the barb portion;

wherein prior to the application of the extrinsic expansion force, the barb portion is positioned within the first compacted profile and the expansion bearing portion extends radially inward of the inner boundary of the expandable body such that the expansion bearing portion is configured to be engaged by the extrinsic expansion force to extend the barb radially outward from the expandable body of the medical device in the second expanded profile.

2. The medical device of claim 1 wherein the barb portion is metal.

3. The medical device of claim 1 wherein the expansion bearing portion is linear.

4. The medical device of claim 1 wherein the expansion bearing portion is non-linear.

5. The medical device of claim 1, wherein the extrinsic expansion force is an inflatable balloon.

8. The system of claim 1 wherein the expandable medical device defines a central longitudinal axis, and further wherein in the first compacted profile the attachment portion extends inwardly toward the longitudinal axis of the expandable medical device.

9. The system of claim 8 wherein in the first compacted profile the barb portion extends outwardly away from the longitudinal axis of the expandable medical device.

10. The system of claim 9 wherein in the first compacted profile the expansion bearing portion extends through an arc between the attachment portion and the barb portion.

6. A medical device system, comprising:

an expansion device operable to be radially expandable to an expanded state; and

an expandable medical device having an inner lumen and mounted to the expansion device for deployment of the expandable medical device, the expandable medical device including an expandable anchor having a barb portion and an expansion bearing portion, the expandable medical device having an outer surface and an inner surface, the expandable medical device having a first compacted profile in which the expansion bearing portion extends inward relative to the inner lumen and, upon application of an extrinsic force by the expansion device, a second expanded profile, the first compacted profile including the barb portion being positioned within the first compacted profile and extended from the medical device in the second expanded profile, including the expansion device contacting the expansion bearing portion and applying an outward expansion force on the expansion bearing portion such that the barb portion extends outside the second expanded profile.

7. A medical device system, comprising:

an expansion device that is radially expandable to apply an expansion force;

an expandable medical device having an outer surface and an inner surface, the expandable medical device defining a longitudinal axis and having a first compacted profile and, upon application of the expansion force with the expansion device that is directed radially outwardly relative to the longitudinal axis, a second expanded profile;

an expandable anchor having a device attachment portion, a barb portion and an expansion bearing portion positioned therebetween;

the device attachment portion being coupled to;

wherein prior to the application of the extrinsic force, the barb portion is positioned within the first compacted profile and the expansion bearing portion extends inward relative to the inner surface of the medical device, and

wherein the expansion bearing portion is configured to be engaged by the expansion device such that the expansion force causes the barb portion to expand such that the barb portion extends outside of the second expanded profile.

11. A medical device system, comprising:

an expansion device operable to be radially expandable to an expanded state; and

an expandable medical device mounted to the expansion device for deployment of the expandable medical device, the expandable medical device including a tubular body an expandable anchor having a barb portion and an expansion bearing portion, the tubular body of the expandable medical device having an outer surface and an inner surface, the expandable medical device having a first compacted profile in which the expansion bearing portion extends radially inward from the inner surface of the tubular body and, upon application of an extrinsic force by the expansion device, a second expanded profile, wherein the expansion device is operable to contact the expansion bearing portion to apply an outward extrinsic force on the expansion bearing portion to outwardly displace the expansion bearing portion, wherein in the first compacted profile the barb portion is positioned within the first compacted profile and wherein in the expanded profile, the barb portion extends outside the second expanded profile.