EP0611557A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surgical implant & surgical kit
Assignee: Smith and Nephew Inc
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Filing: 1994-02-11
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Granted: —
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Expires: 2014-02-11
Abstract
Abstract Surgical kits for the implantation of soft tissue-to-bone anchors and expandable, preferably bioabsorbable, soft tissue anchors. The surgical kits include an embodiment with an outer tube with an expandable anchor releasably attached to its distal end, for guiding the anchor into a predrilled hole; an inner tube with an anchor expanding pin sized for expanding the anchor releasably held in its bore; and a pushrod for pushing the anchor pin into the anchor to expand it and wedge it in a hole. In an alternative embodiment, the anchor pin is attached to the distal end of a pushrod inserted into an outer tube. In one embodiment, the anchor is equipped with downward extending spikes on the underside of an enlarged head for gripping soft tissue and bending barbs to resist withdrawal of the anchor from bone. In another embodiment, the anchor's proximal end has no enlarged head but is equipped with sutures. In a further embodiment, the anchor's enlarged head is tilted at an angle to allow better engagement of spikes with soft tissue.
Inventors
- 👤 Paul Alexander Torrie
- 👤 Gary Paul Tallent
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 05:44
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/08; A61F2/0811; A61B; A61B17/00; A61B17/04; A61B17/0401; A61B17/56; A61B17/58; A61B17/68; A61B2017/00004; A61B2017/0403; A61B2017/0409; A61B2017/0412; A61B2017/0438; A61B2017/0445; A61F2/0805; A61F2/30; A61F2/30721; A61F2/30749; A61F2002/0817; A61F2002/0841; A61F2002/0847; A61F2002/0852; A61F2002/0858; A61F2002/0876; A61F2002/0888; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30316; A61F2002/30535; A61F2002/30579; A61F2002/30594; A61F2/30767; A61F2/30771; A61F2002/30841; A61F2210/00; A61F2210/0004; A61F2220/00; A61F2220/0008
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
169 words
A surgical implant for anchoring soft tissue to bone, the implant comprising: (i) a radially-outward expandable anchor stud, the stud having proximal and distal ends and an elongate body with an outer surface and a longitudinal axis; the stud further comprising: (a) a longitudinal bore extending along the longitudinal axis for receiving a stud-expanding pin; (b) at least two radially-outward expandable legs on the stud for gripping the sides of a bone hole; (c) a plurality of bending barbs on a proximal half of the outer surface of the elongate stud body for gripping bone and resisting forces, at an angle to the longitudinal axis, withdrawing the stud from a bone hole; and (d) gripping barbs on a distal half of the outer surface of the elongate stud body for holding the stud in a bone hole; and (ii) a stud-expanding pin for inserting in the longitudinal bore of the stud body to expand the at least two legs radially outward for gripping the sides of a bone hole.
Claim 2
Dependent Claim
35 words
The implant of claim 1, wherein the stud further comprises an enlarged head at the proximal end of the stud, the enlarged head having an undersurface and comprising downwardly extending spikes for engaging soft tissue.
Claim 3
Dependent Claim
22 words
The implant of claim 2, wherein the undersurface of the enlarged head is at an angle of about 15° to the horizontal.
Claim 4
Dependent Claim
15 words
The implant of any preceding claim comprising from about 8 to about 16 bending barbs.
Claim 5
Dependent Claim
11 words
The implant of any preceding claim comprising about 4 gripping barbs.
Claim 6
Dependent Claim
14 words
The implant of any preceding claim wherein the stud comprises 3 radially-outwardly expandable legs.
Claim 7
Dependent Claim
32 words
The implant of any claim preceding wherein the anchor stud and anchor expandable pin comprise a bioabsorbable polymeric composition selected from the group consisting of polylactic acid, polyglycolic acid, and copolymers thereof.
Claim 8
Dependent Claim
21 words
The implant of any preceding claim wherein the anchor stud further comprises sutures embedded at the proximal end of the stud.
Claim 9
Dependent Claim
35 words
The implant of any preceding claim wherein the anchor stud comprises an enlarged head tilted at an angle to the horizontal, the enlarged head comprising an undersurface with downwardly extending spikes for gripping soft tissue.
Claim 10
Dependent Claim
196 words
A surgical kit for implanting a soft tissue anchor, the kit comprising: i) an outer tube having an elongate body with distal and proximal ends, and a longitudinal bore along the length of the body for receiving an inner tube; ii) an anchor stud having a longitudinal axis, the anchor stud releasably affixed to the distal end of the outer tune, the anchor stud comprising a bore along the anchor stud longitudinal axis, said bore in communication with the bore in the outer tube, the anchor stud having at least two radially-outward expandable legs; iii) an inner tube having an elongate body with distal and proximal ends, the inner tube body sized for insertion into the longitudinal bore in the outer tube; iv) an anchor stud-expanding pin held in the bore of the inner tube, the pin sized for expanding the legs of the anchor stud radially outward to grip walls of a hole in bone; and v) a pushrod sized for insertion into the inner tube and equipped with means for leveraging the pushrod to force the anchor stud-expanding pin into the bore of the anchor stud for expanding the legs outwardly to grip bone.
Claim 11
Dependent Claim
17 words
The surgical kit of claim 10 comprising an implant according to any of claims 1 to 9.
Claim 12
Dependent Claim
151 words
A surgical kit for implanting soft tissue anchors, the kit comprising: i) an outer tube having an elongate body with distal and proximal ends, a longitudinal bore along the length of the body for receiving a pushrod; ii) an anchor stud having a longitudinal axis, the anchor stud releasably affixed to the distal end of the outer tube, the anchor stud comprising a bore along the longitudinal axis in communication with the bore in the outer tube, the anchor stud having at least two radially-outward expandable legs; and iii) a pushrod sized for insertion into the outer tube, the pushrod equipped with (a) an anchor stud-expanding pin releasably attached at its distal end, and (b) means for leveraging the pushrod into the bore of the outer tube at its proximal end, the anchor stud-expanding pin being sized for fitting into the bore of the anchor stud for expanding the legs outwardly.
Claim 13
Dependent Claim
21 words
The surgical kit of claim 12 wherein the anchor stud comprising an implant according to any of claims 1 to 9.
Claim 14
Dependent Claim
22 words
The surgical kit of claim 10 or claim 12 wherein the anchor stud and anchor stud-expanding pin comprises a bioabsorbable polymeric composition.
Claim 15
Dependent Claim
32 words
The surgical kit of claim 14 wherein the anchor stud and expanding pin are of a bioabsorbable polymeric composition selected from the group consisting of polylactic acid, polyglycolic acid, and copolymers thereof.
Claim 16
Dependent Claim
23 words
The surgical kit of claim 10 or claim 12 wherein the anchor stud is releasably attached to the outer tube by screw threads.
References Cited (Backward Citations)
No citation records indexed.
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