Surgical fastener

• US 4,669,473 A
• Filed: 09/06/1985
• Issued: 06/02/1987
• Est. Priority Date: 09/06/1985
• Status: Expired due to Term

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Acufex Microsurgical, Inc.
• Inventors: Richards, William D., Lichtman, Philip R.
• Primary Examiner(s): Pinkham, Richard C.
• Assistant Examiner(s): Jackson, Gary
• Application Number:
  US06/773,355
• Time in Patent Office: 634 Days
• Field of Search: 128/334 R, 128/335, 128/334 C, 128/337, 227/67, 24/150 P, 24/150 FP, 24/90 R, 112/104 R, 411/458, 411/459, 411/460, 411/457, 411/446, 411/447
• US Class Current: 606/215
• CPC Class Codes: A61B 17/0401 Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors A61B17/0642 takes precedence; fixation devices for tendons or ligaments A61F2/0811
• CPC Class Codes: A61B 17/064 Surgical staples, i.e. penetrating the tissue
• CPC Class Codes: A61B 17/8695 Washers surrounding screw head in plate hole A61B17/8047, between bone plate and bone A61B17/8028
• CPC Class Codes: A61B 2017/0409 Instruments for applying suture anchors for applying suture clamps, clips or locks A61B2017/0488
• CPC Class Codes: A61B 2017/0417 T-fasteners
• CPC Class Codes: A61B 2017/0419 H-fasteners

Abstract

An improved surgical fastener having at least one head portion and a filament portion arranged in a T configuration, wherein at least one end of the said at least one head portion is sharply pointed, so that when that head portion is implanted in body tissue, the head portion will attach itself securely to the tissue and will remain there despite the application of a substantial pulling force on the filament portion.

Claims

1. An improved surgical fastener comprising:

a resilient filament that is relatively flexible along its length, and at least one elongated head that is relatively inflexible along its length;

said at least one elongated head being attached to said filament so that said filament normally is substantially perpendicular to said at least one elongated head;

characterized in that at least one end of said elongated head is sharply pointed;

whereby when said at least one elongated head is driven lengthwise into tissue with said filament bent relative to said elongated head so as to extend substantially parallel to the driving axis, the resiliency of said filament will (a) cause said elongated head to tend to turn to restore the original perpendicular position of said filament relative to said at least one elongated head and (b) cause said at least one sharply pointed end of said at least one elongated head to embed itself further into said tissue, thereby securely anchoring said fastener in said tissue so that it may not be easily withdrawn by pulling on said filament.

2. A surgical fastener according to claim 1 wherein at least one end of said at least one elongated head is bevelled to form a sharp point.

3. A surgical fastener according to claim 2 wherein said sharp point is eccentric of the longitudinal axis of said at least one elongated head.

4. A surgical fastener according to claim 1 wherein both ends of said at least one elongated head are sharply pointed.

5. A surgical fastener according to claim 4 wherein both ends of said at least one elongated head are bevelled to form sharp points.

6. A surgical fastener according to claim 5 wherein both of said sharp points are eccentric of the longitudinal axis of said at least one elongated head.

7. A surgical fastener according to claim 6 wherein said sharp points are disposed on opposite sides of said longitudinal axis of said at least one elongated head.

8. A surgical fastener according to claim 1 having at least three of said elongated heads connected by portions of said filament.

9. A surgical fastener according to claim 1 wherein said fastener is made of a synthetic polymerized resin.

10. A surgical fastener according to claim 1 wherein said fastener is made of a material that is absorbable by living human or animal tissue.

11. A surgical fastener according to claim 1 wherein said fastener is made of a material that is not absorbable by living human or animal tissue.

12. A surgical fastener according to claim 1 wherein said filament has an outer diameter of about 0.015 inches, said at least one elongated head has an outer diameter of about 0.030 inches, and said at least one elongated head has a length of about 0.18 inches.

13. A surgical fastener according to claim 1 wherein said fastener is formed out of a polylactide copolymer or a glycolide copolymer or a nylon, or a polyethylene or a carbonate polymer or a polyether ester copolymer.

14. A surgical fastener according to claim 1 wherein said at least one elongated head is pointed eccentrically of the longitudinal axis of said at least one head.

15. A surgical fastener according to claim 1 wherein said filament has at least one rib thereon to engage a washer.

16. A surgical fastener according to claim 15 wherein said at least one rib is conically shaped.

17. A surgical fastener according to claim 1 having a pair of said elongated heads, and further wherein said elongated heads are disposed at opposite ends of said filament.

18. A surgical fastener according to claim 17 wherein at least one end of each of said pair of elongated heads is bevelled to form a sharp point.

19. A surgical fastener according to claim 17 wherein both ends of each of said pair of elongated heads are sharply pointed.

20. A surgical fastener according to claim 19 wherein both ends of each of said pair of elongated heads are bevelled to form sharp points.

21. A surgical fastener comprising:

a resilient filament that is relatively flexible along its length; and

at least one elongated head that is relatively inflexible along its length;

said at least one elongated head being attached to said filament so that when said fastener is unstressed said filament is substantially perpendicular to said at least one elongated head; and

at least one end of said elongated head being sharply pointed;

whereby when said at least one elongated head is driven lengthwise into tissue while said filament is bent adjacent said at least one elongated head so that at least a portion thereof extends substantially parallel to said at least one elongated head, the resiliency of said filament will cause said elongated head to tend to turn to restore the original perpendicular position of said filament relative to said at least one elongated head, so that said at least one sharply pointed end of said at least one elongated head will embed itself further into said tissue, whereupon said fastener will be securely anchored in said tissue and may not be easily withdrawn by pulling on said filament.

22. A surgical fastener according to claim 21 wherein said filament has at least one rib thereon to engage a washer.

23. A surgical fastener according to claim 22 wherein said at least one rib is conically shaped.

24. A surgical fastener according to claim 21 wherein said at least one end of said at least one elongated head is bevelled to form a sharp point at said at least one end.

25. A surgical fastener according to claim 24 wherein said sharp point is eccentric of the longitudinal axis of said at least one elongated head.

26. A surgical fastener according to claim 21 wherein said at least one elongated head is pointed eccentrically of the longitudinal axis of said at least one elongated head.

27. A surgical fastener according to claim 21 having at least three heads connected by portions of said filaments.

28. A surgical fastener according to claim 21 wherein said filament has an outer diameter of about 0.015 inches, said at least one elongated head has an outer diameter of about 0.030 inches, and said at least one elongated head has a length of about 0.18 inches.

29. A surgical fastener according to claim 21 wherein said fastener is formed out of a polylactide copolymer or a glycolide copolymer or a nylon or a polyethylene or a carbonate polymer or a polyether ester copolymer.

30. A surgical fastener according to claim 21 having two elongated heads connected by said filament.

31. A surgical fastener according to claim 30 wherein at least one end of each of said pair of elongated heads is bevelled to form a sharp point.

32. A surgical fastener according to claim 30 wherein both ends of each of said pair of elongated heads are sharply pointed.

33. A surgical fastener according to claim 32 wherein both ends of each of said pair of elongated heads are bevelled to form sharp points.

34. A surgical fastener according to claim 21 wherein both ends of said at least one elongated head are sharply pointed.

35. A surgical fastener according to claim 34 wherein both ends of said at least one elongated head are bevelled to form sharp points.

36. A surgical fastener according to claim 35 wherein both of said sharp points are eccentric of the longitudinal axis of said at least one elongated head.

37. A surgical fastener according to claim 36 wherein said sharp points are disposed on opposite sides of said longitudinal axis of said at least one elongated head.