Sutureless retention device

• US 6,695,861 B1
• Filed: 03/07/2003
• Issued: 02/24/2004
• Est. Priority Date: 09/20/2002
• Status: Expired due to Term

• Current Assignee: Interrad Medical, Inc.
• Original Assignee: Interrad Medical, Inc.
• Inventors: Rosenberg, Michael S., Claude, Timothy J.
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US10/383,903
• Time in Patent Office: 354 Days
• Field of Search: 606/185, 606/184, 606/1, 604/174, 604/175, 604/164, 604/264, 604/165
• US Class Current: 606/185
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61M 2025/0293 Catheter, guide wire or the like with means for holding, centering, anchoring or frictionally engaging the device within an artificial lumen, e.g. tube
• CPC Class Codes: A61M 25/0084 being one or more injection needles
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence

Abstract

A retention device for anchoring indwelling catheters, sheath introducers or other medical devices beneath the skin of a patient includes an anchoring mechanism loaded into an anchor sleeve that is attached to an inserted medical device; following insertion into a patient, deploying the device causes the tines of the anchoring mechanism to be extended from the device, thus anchoring the device and any attached medical device securely beneath the patient'"'"'s skin.

Claims

1. A device for subcutaneously anchoring a catheter within a patient, comprising:

a. an anchor sleeve having a chamber defining at least a single port;

b. an anchor mechanism loaded into the chamber, the anchor mechanism having;

i. a control rod movable within the chamber between a first position and a second position,

ii. a tine having a first end fixedly attached to the control rod, and a second free end,

(1) the second end of the tine is capable of flexibly and repeatedly moving between a restrained position near the control rod and an unrestrained position away from the control rod,

(2) the tine having a trained shape when in the unrestrained position,

(3) the length of the tine is such that the tine is restrained within the chamber when the control rod is in the first position, and

(4) the port is sized and located so the free end of the tine is proximate the port when the tine is in the first position;

whereby moving the control rod from the first position to the second position causes the second end of the tine to exit the chamber through the port to at least partially assume the trained shape.

2. The anchoring device of claim 1 wherein the free end of the tine is rounded.

3. The anchoring device of claim 1 wherein the tine has a constant diameter along its length.

4. The anchoring device of claim 1 wherein the free end is narrower than the attached end.

5. The anchoring device of claim 1 wherein the anchor sleeve is reinforced.

6. The anchoring device of claim 5 wherein the anchor sleeve is reinforced by a braid.

7. The anchoring device of claim 6 wherein the braid is nitinol.

8. The anchoring device of claim 6 wherein the braid is stainless steel.

9. The anchoring device of claim 1 wherein the number of ports is equal to the number of tines.

10. The anchoring device of claim 1 wherein the port is sealed by a material puncturable by the tine when the control rod is moved to the second position.

11. The anchoring device of claim 1 wherein the device is attached to an introducer sheath.

12. The anchoring device of claim 11 wherein the introducer sheath defines a lumen capable of receiving a catheter.

13. The anchoring device of claim 11 wherein at least the tine is made of nitinol.

14. The anchoring device of claim 13 wherein the tine is made of nitinol processed to be superelastic below human body temperature.

15. The anchoring device of claim 11 wherein the tine and control rod are longitudinally movable in the chamber.

16. The anchoring device of claim 11 wherein the tine in the unrestrained position defines an arc in a direction away from the proximal end of the control rod.

17. The anchoring device of claim 11 wherein a plurality of tines is attached to the control rod.

18. The anchoring device of claim 17 wherein the tines are integrally attached to the control rod.

19. The anchoring device of claim 17 wherein the tines are separately attached to the control rod.

20. The anchoring device of claim 1 wherein the device is attached to a catheter.

21. The anchoring device of claim 20 wherein at least the tine is made of nitinol.

22. The anchoring device of claim 21 wherein the tine is made of nitinol that is processed to be superelastic below human body temperature.

23. The anchoring device of claim 21 wherein the tine is made of nitinol that is processed to exhibit thermal shape memory when exposed to human body temperature.

24. The anchoring device of claim 20 wherein the tine and control rod are longitudinally movable in the chamber.

25. The anchoring device of claim 20 wherein the tine in the unrestrained position defines an arc in a direction away from the proximal end of the control rod.

26. The anchoring device of claim 20 wherein a plurality of tines is attached to the control rod.

27. The anchoring device of claim 20 wherein the tines are integrally attached to the control rod.

28. The anchoring device of claim 20 wherein the tines are separately attached to the control rod.