Anchor Device and Method

• US 20110301543A1
• Filed: 08/17/2011
• Published: 12/08/2011
• Est. Priority Date: 03/09/2006
• Status: Active Grant

• Current Assignee: Interrad Medical, Inc.
• Original Assignee: Interrad Medical, Inc.
• Inventors: Rosenberg, Michael S., Claude, Timothy L.
• Granted Patent: US 8,771,232 B2
• Time in Patent Office: Days
• US Class Current: 604/175
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61M 2025/0286 anchored in the skin by suture or other skin penetrating devices
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence

Abstract

Some embodiments of an anchor device may include bendable anchor mechanism that is deployable in a subcutaneous layer to releasably secure the anchor device to a patient'"'"'s body. Certain embodiments of the anchor mechanism may include one or more barbs that flexibly bend in response to an insertion or removal force. As such, the anchor mechanism may be inserted into a subcutaneous layer, and removed from the subcutaneous layer, without the need for a separate actuation device to extend or retract the barbs.

Claims

1. A system for securing a tubular medical device at a skin incision location, comprising:

a tubular medical device configured to advance through a skin penetration point, the tubular medical device comprising a longitudinal axis, an inner lumen, and an outer tubular wall extending for a longitudinal length from a proximal end portion to a distal tip;

an anchor base comprising a tubular structure engaged around a portion of the outer tubular wall of the tubular medical device such that the tubular structure of the anchor base is generally coaxial with the longitudinal axis of the tubular medical device, the anchor base having a longitudinal length that is substantially shorter than the longitudinal length of the tubular medical device, the anchor base being engaged with the tubular medical device at a location spaced proximally from the distal tip by a distance greater than the longitudinal length of the anchor base, wherein the anchor base comprises two or more the subcutaneous anchor barbs that are a unitary structure with the tubular structure of the anchor base, the subcutaneous anchor barbs extending outwardly away from one another and away from the outer wall of the tubular medical device when the subcutaneous anchor barbs are deployed in a subcutaneous layer adjacent to the skin penetration point of the tubular medical device,

wherein each of the subcutaneous anchor barbs comprises a free end that extends toward the proximal end portion of the tubular medical device when in an insertion orientation and that extends toward the distal tip of the tubular medical device when in a removal orientation, the subcutaneous anchor barbs being flexibly bendable to the removal orientation when the anchor base is withdrawn from the subcutaneous layer and out through the skin penetration point.

2. The system of claim 1, wherein the subcutaneous anchor barbs extend outwardly in a convexly curved shape when the subcutaneous anchor barbs are deployed in a subcutaneous layer adjacent to the skin penetration point of the tubular medical device.

3. The system of claim 1, wherein the free end of each of that subcutaneous anchor barbs is biased to extend outwardly away from the outer wall of the tubular medical device.

4. The system of claim 1, wherein the subcutaneous anchor barbs are integrally formed with one another and with the tubular structure of the anchor base such that the subcutaneous anchor barbs are unitary with the tubular structure.

5. The system of claim 1, wherein the tubular medical device is a catheter and the outer wall is a catheter wall.

6. The system of claim 1, wherein the subcutaneous anchor barbs and the tubular structure of the anchor base comprises a biocompatible polymer material.

7. The system of claim 1, wherein the subcutaneous anchor barbs extend proximally from a proximal end of the tubular structure of the anchor base.

8. A system for securing a tubular medical device at a skin incision location, comprising:

a tubular medical device configured to advance through a skin penetration point, the tubular medical device comprising a longitudinal axis, an inner lumen, and an outer tubular wall extending for a longitudinal length from a proximal end portion to a distal tip;

an anchor base comprising a tubular structure engaged around a portion of the outer tubular wall of the tubular medical device at a location spaced proximally from the distal tip, wherein the anchor base comprises two or more the subcutaneous anchor barbs integral with the tubular structure of the anchor base, the subcutaneous anchor barbs extending outwardly away from one another and away from the outer wall of the tubular medical device when the subcutaneous anchor barbs are deployed in a subcutaneous layer adjacent to the skin penetration point of the tubular medical device,

wherein each of the subcutaneous anchor barbs comprises a free end that extends toward the proximal end portion of the tubular medical device when in an insertion orientation and that extends toward the distal tip of the tubular medical device when in a removal orientation, the subcutaneous anchor barbs being flexibly bendable to the removal orientation when the anchor base is withdrawn from the subcutaneous layer and out through the skin penetration point.

9. The system of claim 8, wherein the tubular structure of the anchor base is generally coaxial with the longitudinal axis of the tubular medical device.

10. The system of claim 8, wherein the anchor base has a longitudinal length that is substantially shorter than the longitudinal length of the tubular medical device.

11. The system of claim 8, wherein the anchor base is engaged with the tubular medical device at the location spaced proximally from the distal tip by a distance greater than the longitudinal length of the anchor base.

12. The system of claim 8, wherein the subcutaneous anchor barbs extend proximally from a proximal end of the tubular structure of the anchor base.

13. The system of claim 8, wherein the subcutaneous anchor barbs extend outwardly in a convexly curved shape when the subcutaneous anchor barbs are deployed in a subcutaneous layer adjacent to the skin penetration point of the tubular medical device.

14. The system of claim 8, wherein the free end of each of that subcutaneous anchor barbs is biased to extend outwardly away from the outer wall of the tubular medical device.

15. The system of claim 8, wherein the subcutaneous anchor barbs are integrally formed with one another and with the tubular structure of the anchor base such that the subcutaneous anchor barbs are unitary with the tubular structure.

16. The system of claim 8, wherein the tubular medical device is a catheter and the outer wall is a catheter wall.

17. The system of claim 8, wherein the subcutaneous anchor barbs and the tubular structure of the anchor base comprises a biocompatible polymer material.

18. A subcutaneous anchor mechanism, comprising:

a base attachable to a medical device; and

at least one non-retractable barb coupled to the base at a location proximal from a distal tip of the base, wherein the barb is a unitary structure with the base, the non-retractable barb having a free end that is biased to extend outwardly from the base such that, when the base is attached to the medical device, the non-retractable barb extends away from the medical device to abut an underside of a dermis layer when in a deployed orientation in a subcutaneous layer,

wherein the non-retractable barb is flexibly bendable toward the base to a removal orientation such that the free end is adjacent to the base when the non-retractable barb is withdrawn from the subcutaneous layer and out through the dermis layer.

19. The subcutaneous anchor mechanism of claim 18, wherein at least a portion of the non-retractable barb extends away from the base in an arcuate manner when in the deployed orientation.

20. The subcutaneous anchor mechanism of claim 18, wherein the barb is integrally formed with the base such that the barb is unitary with the base, wherein the barb and the base comprises at least one polymer material selected from the group consisting of a PEEK material, a polyurethane material, a polyethylene material, a polyimide material.