Anchoring barb for attachment to a medical prosthesis

• US 7,572,289 B2
• Filed: 01/27/2005
• Issued: 08/11/2009
• Est. Priority Date: 01/27/2004
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated), MED Institute, Inc. (Cook Group Incorporated)
• Inventors: Sisken, Richard B., Agnew, Charles W., Choules, Brian D., Nickless, Benjamin
• Primary Examiner(s): McDermott; Corrine M
• Assistant Examiner(s): STEWART, JASON-DENNIS NEILKEN
• Application Number:
  US11/044,522
• Publication Number:
  US 20050240259A1
• Time in Patent Office: 1,657 Days
• Field of Search: 623/1.12, 623/1.14, 623/1.36, 623/15, 623/2.36, 623/2.37
• US Class Current: 623/1.36
• CPC Class Codes: A61F 2/02 Prostheses implantable into the body closure means for urethra or rectum or for artificial body openings therefor A61F2/0004
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes

Abstract

A medical prosthesis for implantation within the body of a patient comprises a support structure and an anchoring element that comprises a basal portion and at least one barb extending from the basal portion. The anchoring element may be slidably attached to the strut and the strut may include a first stop and a second stop that define a longitudinal zone of movement for the anchoring element. Other devices and methods are described.

Claims

1. A medical prosthesis for implantation within the body of a patient, comprising:

a support structure comprising at least one strut including a first stop and a second stop;

an anchoring element comprising a basal portion with at least one barb extending therefrom, wherein the anchoring element is slidably attached to the at least one strut and is slidable along a length of the strut between a first position adjacent the first stop and a second position adjacent the second stop;

a structure that changes the orientation of the barb when the anchoring element slides from the first position to the second position; and

an actuation mechanism attached to the barb and a deflecting element located on the strut, wherein the actuating mechanism is operable to urge the anchoring element over the strut until it contacts the deflecting element.

2. A medical prosthesis for implantation within the body of a patient, comprising:

a support structure comprising at least one strut including a first stop and a second stop;

an anchoring element comprising a basal portion with at least one barb extending therefrom, wherein the anchoring element is slidably attached to the at least one strut and is slidable along a length of the strut between a first position adjacent the first stop and a second position adjacent the second stop; and

a structure that changes the orientation of the barb when the anchoring element slides from the first position to the second position;

wherein the anchoring element is manipulable by rotation and wherein the strut is twisted to guide the anchoring element from the first to the second orientation.

3. A medical prosthesis for implantation within the body of a patient, comprising:

a support structure comprising at least one strut including a first stop and a second stop;

an anchoring element comprising a basal portion with at least one barb extending therefrom, wherein the anchoring element is slidably attached to the at least one strut and is slidable along a length of the strut between a first position adjacent the first stop and a second position adjacent the second stop; and

a structure that changes the orientation of the barb when the anchoring element slides from the first position to the second position;

wherein the anchoring element is manipulable by rotation and wherein the strut has spiral threads or grooves to guide the anchoring element from the first to the second orientation.

4. A medical prosthesis for implantation within the body of a patient, comprising:

a support structure comprising at least one strut including a first stop and a second stop;

an anchoring element comprising a basal portion with at least one barb extending therefrom, wherein the anchoring element is slidably attached to the at least one strut and is slidable along a length of the strut between a first position adjacent the first stop and a second position adjacent the second stop; and

a structure that changes the orientation of the barb when the anchoring element slides from the first position to the second position;

wherein the first stop is slidably attached to the strut and is configured to urge the anchoring element towards the second stop.

5. The medical prosthesis of claim 4, wherein the second stop comprises a deflecting mechanism for manipulating the barb between the first and second orientations.

6. The medical prosthesis of claim 5 comprising a lock to lock the barb in the second orientation.

7. A medical prosthesis for implantation within the body of a patient, comprising:

a support structure comprising at least one strut;

an anchoring element comprising a basal portion with at feast one barb extending therefrom; and

an actuation mechanism attached to the barb and a deflecting element located on the strut;

wherein the at least one barb includes at least one extended configuration for penetrating the tissue of a bodily surface when the prosthesis is implanted thereagainst;

wherein the anchoring element is slidably attached to the at least one strut;

wherein the at least one strut includes a first stop and a second stop, the stops defining a longitudinal zone of movement for the anchoring element, the length of the longitudinal zone being greater than the length of the anchoring element;

wherein the anchoring element is manipulable between a first configuration in which the barb assumes a first orientation and a second configuration in which the barb assumes a second orientation;

wherein the second orientation is better adapted for allowing the barb to engage the tissue adjacent the prosthesis than is the first orientation; and

wherein the actuating mechanism is operable to urge the anchoring element over the strut until it contacts the deflecting element.

8. A medical prosthesis for implantation within the body of a patient, comprising:

a support structure comprising at least one strut; and

an anchoring element comprising a basal portion with at least one barb extending therefrom;

wherein the at least one barb includes at least one extended configuration for penetrating the tissue of a bodily surface when the prosthesis is implanted thereagainst;

wherein the anchoring element is slidably attached to the at least one strut;

wherein the at least one strut includes a first stop and a second stop, the stops defining a longitudinal zone of movement for the anchoring element, the length of the longitudinal zone being greater than the length of the anchoring element;

wherein the anchoring element is manipulable between a first configuration in which the barb assumes a first orientation and a second configuration in which the barb assumes a second orientation;

wherein the second orientation is better adapted for allowing the barb to engage the tissue adjacent the prosthesis than is the first orientation; and

wherein the anchoring element is manipulable by rotation and the strut is twisted to guide the anchoring element from the first to the second orientation.

9. A medical prosthesis for implantation within the body of a patient, comprising:

a support structure comprising at least one strut; and

an anchoring element comprising a basal portion with at least one barb extending therefrom;

wherein the at least one barb includes at least one extended configuration for penetrating the tissue of a bodily surface when the prosthesis is implanted thereagainst;

wherein the anchoring element is slidably attached to the at least one strut;

wherein the at least one strut includes a first stop and a second stop, the stops defining a longitudinal zone of movement for the anchoring element, the length of the longitudinal zone being greater than the length of the anchoring element;

wherein the anchoring element is manipulable between a first configuration in which the barb assumes a first orientation and a second configuration in which the barb assumes a second orientation;

wherein the second orientation is better adapted for allowing the barb to engage the tissue adjacent the prosthesis than is the first orientation; and

wherein the anchoring element is manipulable by rotation and the strut has spiral threads or grooves to guide the anchoring element from the first to the second orientation.

10. A medical prosthesis for implantation within the body of a patient, comprising:

a support structure comprising at least one strut; and

an anchoring element comprising a basal portion with at least one barb extending therefrom;

wherein the at least one barb includes at least one extended configuration for penetrating the tissue of a bodily surface when the prosthesis is implanted thereagainst;

wherein the anchoring element is slidably attached to the at least one strut;

wherein the at least one strut includes a first stop and a second stop, the stops defining a longitudinal zone of movement for the anchoring element, the length of the longitudinal zone being greater than the length of the anchoring element;

wherein the anchoring element is manipulable between a first configuration in which the barb assumes a first orientation and a second configuration in which the barb assumes a second orientation;

wherein the second orientation is better adapted for allowing the barb to engage the tissue adjacent the prosthesis than is the first orientation; and

wherein the first stop is slidably attached to the strut and is configured to urge the anchoring element towards the second stop.

11. The medical prosthesis of claim 10, wherein the second stop comprises a deflecting mechanism for manipulating the barb between the first and second orientations.

12. The medical prosthesis of claim 11 comprising a lock to lock the barb in the second orientation.