Devices and Methods for Limiting a Depth of Penetration for an Anchor within an Anatomy

• US 20140046427A1
• Filed: 08/07/2013
• Published: 02/13/2014
• Est. Priority Date: 08/10/2012
• Status: Active Grant

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Inventors: Michalak, Christopher S.
• Granted Patent: US 11,458,007 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• CPC Class Codes: A61F 2/064 with special features to facilitate anastomotic coupling anastomosis of natural blood vessels A61B17/11
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes

Abstract

The present disclosure includes a securing device comprising one or more barbs. A barb may comprise a depth stop, which may itself comprise an apex portion coupled to a trough portion. A barb may be constructed, in various embodiments, from a length of shape memory wire. Thus, during deployment, a barb may spring away from a medical device to which the barb is coupled such that the barb makes contact with and punctures, to a limited depth, a body lumen wall. A barb may not, however, fully puncture a body lumen wall. Rather, a depth stop may limit a puncture depth to a depth that does not endanger and/or subject tissue surrounding or external to the lumen wall to damage and/or bleeding or leakage from within the lumen. In various embodiments, a pair of barbs may be coupled to from an integral two pronged barb.

Claims

1. A medical securing device, comprising:

a barb, the barb comprising a pointed tip and a depth stop, the depth stop comprising an apex portion coupled to a trough portion, wherein the depth stop limits a depth of penetration of the barb into a body lumen wall.

2. The medical securing device of claim 1, wherein the trough portion is coupled to one of:

a stent or a stent graft.

3. The medical securing device of claim 1, wherein the barb is coupled to one of:

stent or a stent graft.

4. The medical securing device of claim 1, the barb further comprising a length of shape memory wire.

5. The medical securing device of claim 1, wherein the barb is capable of springing away from a medical device to which the barb is secured during deployment.

6. The medical securing device of claim 1, wherein the depth stop comprises an “

S”

shape.

7. The medical securing device of claim 1, wherein the pointed tip is constructed to a specific length based upon a body lumen wall thickness.

8. A barb constructed from a length of shape memory wire and comprising a pointed tip coupled to a depth stop, the depth stop limiting a depth of penetration of the barb into a body lumen.

9. The barb of claim 8, wherein the depth stop comprises a trough portion coupled to an apex portion.

10. The barb of claim 8, wherein the depth stop comprises an undulating shape.

11. The barb of claim 8, wherein the depth stop comprises an “

S”

shape.

12. The barb of claim 8, wherein the barb is coupled to a medical device.

13. The medical securing device of claim 8, wherein the pointed tip is constructed to a specific length based upon a body lumen wall thickness.

14. A medical device, comprising:

a stent; and

a barb coupled to the stent, wherein the barb comprises a depth stop, the depth stop securing the stent to a body lumen wall and limiting a depth of penetration of the barb within the body lumen wall to a depth that does not exceed the thickness of the body lumen wall.

15. A medical device, comprising:

a stent-graft; and

a barb coupled to the stent, wherein the barb comprises a depth stop, the depth stop securing the stent to a body lumen wall and limiting a depth of penetration of the barb within the body lumen wall to a depth that does not exceed a thickness of the body lumen wall.

16. A method for implanting a medical device, comprising:

deploying the medical device within a body lumen; and

removing a delivery sheath from the medical device, whereby a spring loaded barb coupled to the medical device is allowed to penetrate a wall of the body lumen to a depth that does not exceed a thickness of the wall of the body lumen.

17. The method of claim 16, wherein a depth of penetration of the barb is limited by a depth stop having an undulating shape.

18. The method of claim 16, wherein the depth stop comprises an apex portion coupled to a trough portion.

19. The method of claim 16, wherein the barb comprises a length of shape memory wire.

20. A method for implanting a medical device, comprising:

deploying the medical device within a body lumen, whereby a barb coupled to the medical device and comprising a length of shape memory wire penetrates a wall of the body lumen to a depth that does not exceed a thickness of the wall of the body lumen.