U.S. patent application number 12/550069 was filed with the patent office on 2009-12-17 for soft tissue repair system.
This patent application is currently assigned to Stryker Endo. Invention is credited to Gordon Baker, T. Wade Fallin, M. Todd Miller.
Application Number | 20090312792 12/550069 |
Document ID | / |
Family ID | 29779020 |
Filed Date | 2009-12-17 |
United States Patent
Application |
20090312792 |
Kind Code |
A1 |
Fallin; T. Wade ; et
al. |
December 17, 2009 |
SOFT TISSUE REPAIR SYSTEM
Abstract
A suture anchor delivery system includes a handle having a
needle extending therefrom. A suture anchor assembly is slidably
received on the needle. The suture anchor assembly includes a
proximal anchor, a distal anchor, and a suture extending
therebetween. The suture is secured to the proximal anchor by
forming a loop in the suture and passing the loop at least
partially through a passageway in the proximal anchor. One end of
the suture is then secured to the distal anchor. The other end of
the suture is passed through the loop and terminates in a free end
to selectively lock the suture against the proximal anchor. A
retraction line is passed through the loop to allow a surgeon to
selectively adjust the length of the suture between the two anchors
and/or to selectively unlock the suture from the proximal
anchor.
Inventors: |
Fallin; T. Wade; (Hyde Park,
UT) ; Miller; M. Todd; (Saratoga, CA) ; Baker;
Gordon; (Paradise, UT) |
Correspondence
Address: |
MEDICINELODGE INC.
124 South 600 West
LOGAN
UT
84321
US
|
Assignee: |
Stryker Endo
San Jose
CA
|
Family ID: |
29779020 |
Appl. No.: |
12/550069 |
Filed: |
August 28, 2009 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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11253769 |
Oct 18, 2005 |
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12550069 |
|
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|
10180901 |
Jun 26, 2002 |
6972027 |
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11253769 |
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Current U.S.
Class: |
606/228 ;
606/232 |
Current CPC
Class: |
A61B 2017/0412 20130101;
A61B 17/0401 20130101; A61B 2017/0409 20130101; A61B 2017/0438
20130101; A61B 2017/0496 20130101; A61B 2017/0459 20130101; A61B
2017/0414 20130101; A61B 2017/0464 20130101; A61B 2017/0427
20130101; A61B 2017/0458 20130101; A61B 2017/0404 20130101; A61B
2017/0646 20130101 |
Class at
Publication: |
606/228 ;
606/232 |
International
Class: |
A61B 17/04 20060101
A61B017/04 |
Claims
1. A suture anchor assembly comprising: an anchor having a first
passageway extending through at least a portion of the anchor; a
suture comprising a proximal end and an opposing distal end, a
portion of the suture between the proximal end and the distal end
being formed into a loop, the loop being at least partially passed
through the first passageway, at least one of the proximal end or
the distal end of the suture being passed through the loop such
that pulling on at least one of the proximal end or the distal end
of the suture that is passed through the loop causes the suture to
selectively lock against the anchor; and a retraction line threaded
through the loop of the suture such that the application of tension
by the retraction line on the loop causes the suture to selectively
unlock from the anchor.
2. A suture anchor assembly as recited in claim 1, further
comprising a second passageway extending through at least a portion
of the anchor, a portion of the proximal end or the distal end of
the suture that is passed through the loop passing through the
second passageway before passing through the loop.
3. A suture anchor assembly as recited in claim 1, further
comprising a third passageway extending through at least a portion
of the anchor, a portion of the proximal end or the distal end of
the suture that is not passed through the loop passing through the
third passageway.
4. A suture anchor assembly as recited in claim 1, further
comprising a channel recessed on the anchor, the channel
intersecting with the first passageway.
5. A suture anchor assembly as recited in claim 1, further
comprising a second anchor, the suture being secured to the second
anchor distal of the loop.
6. A suture anchor assembly comprising: an anchor having a first
passageway and a spaced apart second passageway each extending
through at least a portion of the anchor; a suture comprising a
proximal end and an opposing distal end, a portion of the suture
between the proximal end and the distal end passing through the
first passageway and the second passageway so as to form a loop, at
least one of the proximal end or the distal end of the suture being
passed through the loop such that pulling on at least one of the
proximal end or distal end of the suture that is passed through the
loop causes the suture to selectively lock against the anchor; and
a retraction line threaded through the loop of the suture such that
the application of tension by the retraction line on the loop
causes the suture to selectively unlock from the anchor.
7. The suture anchor assembly recited in claim 6, wherein the loop
is coiled so as to form a closed loop, the suture and retraction
line passing through the closed loop.
8. The suture anchor assembly recited in claim 6, wherein the
proximal end of the suture is passed through the loop.
9. The suture anchor assembly recited in claim 6, further
comprising a third passageway extending through the anchor, the
suture passing through the third passageway prior to passing
through the loop.
10. A suture anchor assembly comprising: an anchor comprising: a
top surface and an opposing bottom surface; an elongated channel
recessed into the bottom surface; and a first passageway and a
spaced apart second passageway extending from the top surface to
the channel; and a suture comprising a proximal end and an opposing
distal end, a portion of the suture between the proximal end and
the distal end being formed into a loop, the loop being at least
partially passed through the first passageway, at least one of the
proximal end or the distal end of the suture being passed through
the second passageway and then through the loop such that pulling
on the proximal end or the distal end of the suture that is passed
through the loop causes the suture to selectively lock against the
anchor.
11. A suture anchor assembly as recited in claim 10, further
comprising a retraction line threaded through the loop of the
suture such that tension can be applied on the loop through the
retraction line.
12. A suture anchor assembly as recited in claim 10, wherein the
anchor further comprises a third passageway, wherein the proximal
end or the distal end of the suture that is not passed through the
loop is passed through the third passageway.
13. A suture anchor assembly as recited in claim 12, further
comprising a second anchor, wherein the proximal end or the distal
end of the suture that is not passed through the loop is secured to
the second anchor.
14. A suture anchor assembly as recited in claim 13, further
comprising a channel recessed on the anchor, the channel
intersecting with the first passageway and the second passageway.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. application Ser.
No. 11/253,769 filed Oct. 18, 2005 and entitled SOFT TISSUE REPAIR
SYSTEM (Attorney Docket No. MLI-47 Con) which is a continuation of
U.S. application Ser. No. 10/180,901, filed Jun. 26, 2002 and
entitled SOFT TISSUE REPAIR SYSTEM (Attorney docket no.
13447.7).
BACKGROUND OF THE INVENTION
[0002] 1. The Field of the Invention
[0003] The present invention relates to suture anchors used for
surgically repairing soft tissue, as well as instrumentation and
methods for deploying such anchors.
[0004] 2. The Relevant Technology
[0005] One common type of soft tissue injury is the tearing of the
meniscus within the joint of the knee. The meniscus plays an
important role in absorbing impact and preventing the bones of the
knee joint from directly wearing against each other. Tears commonly
occur from an accident or while participating in a sporting
activity. Such injuries can produce continued or repeated
inflammation of the knee joint and, in more extreme cases, produce
binding on the knee joint, thereby preventing normal mobility.
[0006] A common surgical procedure to remedy the injury is to
remove the torn portion of the meniscus through an arthroscopic
procedure. Depending on how much of the meniscus is removed,
however, this procedure can result in direct contact by the bones
of the knee joint during normal activity. As such, the bones begin
to wear, potentially creating other problems in the future.
[0007] A tear in the meniscus can be healed if the tissue bounding
the tear is securely held together for a sufficiently long period
of time to allow the tissue to bind together. Although a number of
different pin and anchor systems have been developed for
facilitating repair of a torn meniscus, each of the conventional
approaches has shortcomings. Most commonly, the pin and anchor
systems do not sufficiently hold the tissue together to allow
healing of the tear. Another common shortcoming is that the pin or
anchor systems require some structure to remain in or on the
bearing surface of the meniscus. This structure is compressed
between the bones of the knee joint during normal use. As such, the
structure can produce wear on the meniscus and/or the bones of the
knee joint.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Various embodiments of the present invention will now be
discussed with reference to the appended drawings. It is
appreciated that these drawings depict only typical embodiments of
the invention and are therefore not to be considered limiting of
its scope.
[0009] FIG. 1 is a perspective view of one embodiment of a suture
delivery system of the present invention;
[0010] FIGS. 2 and 2A illustrate a cross-sectional side view of the
suture delivery system shown in FIG. 1 with the handle in a
retracted position;
[0011] FIGS. 3 and 3A illustrate a cross-sectional side view of the
suture delivery system shown in FIG. 1 with the handle in an
advanced position;
[0012] FIG. 4 is a perspective view of the suture anchor assembly
of the delivery system shown in FIG. 1 mounted on a needle of the
system;
[0013] FIG. 5 is a top plan view of the needle of the delivery
system shown in FIG. 1;
[0014] FIG. 6 is an elevated side view of an alternative embodiment
of the needle shown in FIG. 5;
[0015] FIG. 7 is a perspective view of the suture anchor assembly
shown in FIG. 4;
[0016] FIG. 8 is a side view of the suture anchor assembly of FIG.
4 with the needle in cross section;
[0017] FIG. 9 is an enlarged cross-sectional side view of the
proximal anchor of the suture anchor assembly shown in FIG. 8;
[0018] FIG. 10 is a perspective view of the suture anchor assembly
of FIG. 8 positioned to be inserted into a torn meniscus;
[0019] FIG. 11 is a side view of the suture anchor assembly of FIG.
10 with a tip of the needle and distal anchor being passed through
the soft tissue;
[0020] FIG. 12 is a side view of the assembly shown in FIG. 11 with
the needle being retracted and the distal anchor positioned;
[0021] FIG. 13 is a side view of the assembly shown in FIG. 12 with
the needle being passed again through the soft tissue;
[0022] FIG. 14 is a side view of the assembly shown in FIG. 13 with
the proximal anchor being advanced through the soft tissue;
[0023] FIG. 15 is a perspective view of the soft tissue of FIG. 10
having both the proximal anchor and distal anchor mounted
thereon;
[0024] FIG. 16 is a perspective view of the proximal and distal
anchor of FIG. 15 with slack from the suture extending therebetween
being moved to the loop;
[0025] FIG. 17 is a perspective view of the soft tissue of FIG. 15
with slack in the loop of the suture being removed through the
proximal end of the suture;
[0026] FIG. 18 illustrates a perspective view of the soft tissue of
FIG. 17 having the suture locked on the proximal anchor; and
[0027] FIGS. 19-23 are alternative embodiments of suture anchors
having sutures uniquely mounted thereon for selective locking.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0028] Depicted in FIG. 1 is one embodiment of an inventive suture
delivery system 8 incorporating features of the present invention.
Suture delivery system 8 comprises an insertion device 10 and a
suture anchor assembly 20 disposed thereon. Suture delivery system
8 is configured for inserting suture anchors of suture anchor
assembly 20 into soft tissue so as to subsequently facilitate
repair of the soft tissue, such as the meniscus, tendons,
ligaments, muscles, or the like. It will be appreciated, however,
that suture delivery system 8 may also be used in a variety of
other applications.
[0029] Insertion device 10 comprises a handle 16 having a needle
assembly 17 extending therefrom. Handle 16 has an exterior surface
24 extending between a proximal end 12 and an opposing distal end
14. Although handle 16 is shown having a generally circular
transverse cross section, it is appreciated that handle 16 may have
any of a variety of alternative cross-sectional shapes such as, but
not limited to, square, rectangular, oblong, triangular, and the
like.
[0030] As shown in FIG. 2, handle 16 comprises an elongated,
tubular sidewall 22 extending between a proximal end wall 23 and an
opposing distal end wall 25. Handle 16 has an interior surface 26
that bounds a chamber 28. Projecting into chamber 28 from proximal
end wall 23 is a support 29. It is appreciated that support 29 can
be formed separate from or integral with proximal end wall 23 and
can be eliminated by simply increasing the thickness of proximal
end wall 23. A passageway 30 extends through proximal end wall 23
and support 29 so as to communicate with chamber 28. Similarly, a
passageway 32 extends through distal end wall 25 so as to
communicate with chamber 28. Passageways 30 and 32 are disposed in
axial alignment.
[0031] As depicted in FIGS. 1 and 2, exterior surface 24 of handle
16 includes a top surface 27. An elongated slot 36 is oriented
along the length of top surface 27 and extends through sidewall 22
so as to communicate with chamber 28. Slot 36 has a proximal end 33
and an opposing distal end 35.
[0032] A lever 37 is slidably mounted on handle 16. Specifically,
lever 37 comprises a slide plate 38 having a top surface 39 and an
opposing bottom surface 41. Bottom surface 41 of slide plate 38
rides against top surface 27 of handle 16. An arm 40 downwardly
projects from bottom surface 41 of slide plate 38, through slot 36,
and into chamber 28. A rib outwardly projects from each side of arm
40 within chamber 28 so as to retain arm 40 within chamber 28. A
passageway 45 extends through arm 40 in alignment with passageways
30 and 32. Lever 37 further comprises a thumb rest 43 upwardly
projecting from top surface 39 of slide plate 38. Lever 37 is
selectively operable along slot 36 between a retracted distal
position as shown in FIGS. 1 and 2 and an advanced proximal
position as shown in FIG. 3.
[0033] As depicted in FIGS. 2 and 2A, needle assembly 17 generally
comprises a needle 18, a sleeve 34 slidably disposed about a
portion of needle 18, and a sheath 53 covering at least a portion
of sleeve 34. Needle 18 has a proximal end 47 and an opposing
distal end 49 that terminates at a sharpened distal tip 51.
Proximal end 47 of needle 18 is secured within passageway 30 of
support 29 by adhesive, welding, or other conventional forms of
attachment. Needle 18 freely extends distally through passageway 45
of lever 37 and passageway 32 of distal end wall 25 such that
distal end 49 of needle 18 freely projects distal of handle 16. In
alternative embodiments, it is appreciated that needle 18 need only
extend partially along the length of handle 16.
[0034] As shown in FIGS. 4 and 5, needle 18 comprises an exterior
surface 46 and an interior surface 48 each extending between
proximal end 47 and distal end 49. Interior surface 48 bounds a
passage 50 extending through needle 18. A slot 52 is formed on an
upper surface of needle 18 and extends between exterior surface 46
and interior surface 48. Slot 52 runs from distal tip 51 to a lip
55 formed proximal thereof. In alternative embodiments, it is
appreciated that slot 52 can extend the entire length of needle 18
or can terminate at any point proximal of lip 55. As shown in FIG.
5, slot 52 comprises a wide distal portion 57 and a narrow proximal
portion 59. A shoulder 54 is formed on one side of slot 52 at the
intersection of portions 57 and 59. In another embodiment,
shoulders can be formed on each side of slot 52 at the intersection
of portions 57 and 59. The function of shoulder 54 will be
discussed below in greater detail.
[0035] In the embodiment shown in FIG. 5, needle 18 is straight
along its entire length. In an alternative embodiment depicted in
FIG. 6, a needle 19 is shown having a distal end 49 that curves
upwardly. It will be appreciated that depending on the intended use
thereof, the distal end of needle 18 can be curved or bent into a
variety of alternative configurations.
[0036] Returning to FIGS. 2 and 2A, sleeve 34 encircles needle 18
so as to freely slide over needle 18. Sleeve 34 extends between a
proximal end 61 and an opposing distal end 67. Proximal end 61 of
sleeve 34 is secured within passageway 45 of lever 37 such as by an
adhesive, welding or other conventional forms of connection. Sleeve
34 extends distally through passageway 32 of handle 16 and
terminates at a free distal end face 69.
[0037] Since sleeve 34 is connected to lever 37, sleeve 34 is slid
between an advanced position and a retracted position as lever 37
is selectively moved between its advanced and retracted positions.
For example, depicted in FIGS. 2 and 2A, lever 37 and sleeve 34 are
each in their retracted proximal position. In this position, distal
end face 69 of sleeve 34 is disposed proximal of the anchors of
suture anchor assembly 20. In the advanced distal position depicted
in FIGS. 3 and 3A, sleeve 34 slides along needle 18 such that
distal end face 69 of sleeve 34 extends to or past distal tip 51 of
needle 18. Lever 37 is thus operable to selectively position sleeve
34. In turn, as discussed below in greater detail, sleeve 34
facilitates placement of suture anchor assembly 20.
[0038] Needle 18 is typically made of a metal, such as stainless
steel, but can also be made of plastic, composite, or other desired
material. Where needle 18 is straight, sleeve 34 can be made of the
same material as needle 18. Where needle 18 is curved, however,
sleeve 34 is typically made of a polymeric material stiff enough to
advance an anchor of suture anchor assembly 20 but flexible enough
to conform to the contour of needle 18 as sleeve 34 passes over
needle 18. For example, in one embodiment, sleeve 34 is comprised
of polyimide or polyetheretherketone.
[0039] Returning to FIGS. 2 and 2A, sheath 53 encircles sleeve 34
such that sleeve 34 is freely slideable therein. Sheath 53 includes
a proximal end 71 and an opposing distal end 73 that terminates at
a distal end face 75. Proximal end 71 of sheath 53 is secured
within passageway 32 of handle 16 such as by an adhesive, welding,
or other conventional forms of securing. In part, sheath 53 is
disposed over sleeve 34 to protect sleeve 34. As discussed below,
however, distal end face 75 of sheath 53 can also be positioned to
function as a rearward or proximal stop for suture anchor assembly
20.
[0040] Depicted in FIG. 7, suture anchor assembly 20 comprises a
proximal anchor 56, a distal anchor 58, and a suture 60 extending
therebetween. Proximal anchor 56 has a generally elongated
configuration including a top surface 63 and an opposing bottom
surface 65 that each extend between a proximal end 77 and an
opposing distal end 79. Distal end 79 terminates at a sharpened
nose 81. An elongated channel 66 is recessed into bottom surface 65
of proximal anchor 56 and extends along the length thereof. Channel
66 is configured to receive portions of suture 60 therein. As
depicted in FIG. 9, a plurality of spaced passageways 68A, 68B, and
68C extend from top surface 63 to channel 66. It is appreciated
that in alternative embodiments, proximal anchor 56 may have one,
two, or four or more passageways 68 extending therethrough.
[0041] Returning to FIG. 7, proximal anchor 56 is more specifically
comprised of an elongated body 64 having a substantially circular
transverse cross-section complementary to that of passage 50 of
needle 18. Channel 66 is formed on bottom surface 65 of body 64. An
elongated neck 62 upwardly projects from body 64 along the length
of body 64 and terminates at top surface 63. A flange 75 outwardly
projects from each side of neck 62 along the length thereof at top
surface 63. In alternative embodiments, it is appreciated that
flanges 75 can be eliminated or can project from only one side of
neck 62. Furthermore, flanges 75 need not extend along the full
length of neck 62.
[0042] Turning to FIG. 4, proximal anchor 56 is loaded onto needle
18 by sliding body 64 into passage 50 of needle 18 at distal tip
51. Proximal anchor 56 is slid proximally within passage 50 with
neck 62 extending through and beyond slot 52. Body 64 has a
diameter greater than the width of slot 52, thereby preventing
proximal anchor 56 from unintentionally falling out through slot
52. In this regard, it is appreciated that bottom portion 64 may
have a variety of alternative shapes not necessarily corresponding
to the shape of needle 18. Alternatively, proximal anchor 56 may be
inserted into needle 18 by snap-fit through slot 52. Flanges 75
outwardly project from neck 62 above slot 52. Depicted in FIG. 2A,
proximal anchor 56 is slid proximally until proximal anchor 56 hits
a stop such as distal end face 69 of sleeve 34, distal end face 75
of sheath 53, or lip 55 of needle 18.
[0043] Returning to FIG. 7, distal anchor 58 has a generally
elongated configuration that extends between a proximal end 76 and
an opposing distal end 74. Distal end 74 terminates at a downwardly
sloping sharpened nose 101. More specifically, distal anchor 58
comprises an elongated body 72 that extends between proximal end 76
and distal end 74. Body 72 has a generally circular transverse
cross-section complementary to that of passage 50 of needle 18. A
notch 83 is formed through body 72 so as to divide body 72 into a
proximal portion 85 and a spaced apart distal portion 87. In
alternative embodiment, notch 83 need not completely divide body
72.
[0044] A flexible prong 80 projects from proximal portion 85 of
body 72 into notch 83 and extends below body 72. Prong 80 can be
resiliently biased into notch 83 so as to be in alignment with body
72.
[0045] An elongated neck 78 upwardly projects from body 72 along
the length thereof and spans across notch 83. Neck 78 terminates at
a free top surface 93. A pair of spaced apart passageways 82A and
82B transversely extend between the opposing sides of neck 78. In
alternative embodiments, one or three or more passageways 82 can be
formed on distal anchor 58. Furthermore, passageways 82 can extend
at a variety of other orientations. Positioned proximal of
passageways 82, a wedged shaped flange 70 outwardly projects from
each side of neck 78 at top surface 93. In alternative embodiments,
flanges 70 can be eliminated or project from only one side of neck
78.
[0046] As shown in FIG. 4, distal anchor 58 is loaded onto needle
18 by sliding body 72 into passage 50 of needle 18 at distal tip
51. Distal anchor 58 is slid proximally within passage 50 with neck
78 extending through and beyond slot 52. Body 72 has a diameter
greater than the width of slot 52, thereby preventing distal anchor
58 from unintentionally falling out through slot 52. In this
regard, it is appreciated that body 72 may have a variety of
alternative shapes not necessarily corresponding to the shape of
passage 50 of needle 18. Furthermore, distal anchor 58 may be
inserted into needle 18 by snap-fit through slot 52. Flanges 70
outwardly project from neck 78 above slot 52. Distal anchor 58 is
slid proximally until distal anchor 58 hits against shoulder 54 of
needle 18. In this regard, neck 78 of distal anchor 58 is slightly
wider than neck 62 of proximal anchor 56.
[0047] As depicted in FIG. 8, as body 72 of distal anchor 58 is
slid into passage 50 of needle 18, prong 80 is compressed into
notch 83 so as to resiliently bias against interior surface 48 of
needle 18. As a result, prong 80 frictionally secures distal anchor
58 within needle 18 so as to preclude distal anchor 58 from
unintentionally sliding out of passage 50. In this regard, it is
appreciated that prong 80 can also project from distal portion 87
of body 72 or from neck 78. Furthermore, prong 80 need not project
below body 72 but can project from the sides thereof. In addition,
prong 80 can be divided into two or more prongs that project in
opposite or different directions.
[0048] As shown in FIG. 7, proximal anchor 56 and distal anchor 58
are secured together by suture 60. As used in the specification and
appended claims, the term "suture" is broadly intended to include
any type of flexible line but typically comprises medical grade
suture. Suture 60 comprises a proximal end 84 that terminates at a
free end 92 and an opposing distal end 86 that terminates at a
distal tip 99. Distal end 86 of suture 60 is secured to distal
anchor 58 by passing distal tip 99 through passageway 82A and then
passing distal tip 99 back through passageway 82B. Portions of
suture 60 proximal and distal of passageways 82A and 82B are then
secured together by way of a knot 90.
[0049] It is appreciated that suture 60 can be secured to distal
anchor 58 in a vast number of different ways. By way of example and
not by limitation, suture 60 can be loop through a single
passageway and then tied to itself. Alternatively, distal tip 99
can be passed through a single passageway. A large knot can then be
formed at distal tip 99, the knot being sufficiently large to
preclude distal tip 99 from passing back through the passageway. In
yet other embodiments, distal end 86 of suture 60 can be secured to
distal anchor 58 by an adhesive, clamp, being integrally molded
therewith, or any number of other conventional fastening
techniques.
[0050] Suture 60 extends from distal anchor 58 to proximal anchor
56. At proximal anchor 56, suture 60 extends from bottom surface 65
up through passageway 68A. A loop 88 is then formed on suture 60.
As used in the specification and appended claims, the term "loop"
is defined as a curving or doubling of a line so as to form a
closed or partly open curve within itself through which another
line can be passed or into which a hook may be hooked. Loop 88 is
passed down through passageway 68B. Suture 60 proximal of loop 88
then passes down through passageway 68C where it then passes
through loop 88.
[0051] A retraction line 94 is passed through loop 88 of suture 60
such that opposing ends 95 and 97 of retraction line 94 project
from loop 88. Retraction line 94 comprises a suture or any other
form of flexible line. It is appreciated that in one embodiment,
retraction line 94 can comprise the proximal end of suture 60.
Furthermore, retraction line 94 can be formed into a continuous
loop. Retraction line 94 is positioned such that by simultaneously
pulling on opposing ends 95 and 97, tension can be applied to loop
88 in a direction away from proximal anchor 56.
[0052] In the above assembled configuration, pulling on free end 92
of suture 60 selectively locks suture 60 to proximal anchor 56.
Specifically, as free end 92 of suture 60 is tensioned, loop 88
begins to be retracted into passageway 68B. Passageway 68B has a
diameter large enough to receive loop 88 but too small to permit
loop 88 and the portion of suture 60 passing therethrough to be
pulled through passageway 68B. For example, in one embodiment where
suture 60 is a size 0 suture having a diameter in a range from
about 0.013 inches to about 0.016 inches, passageway 68B is
circular and has a diameter of about 0.25 inches. Accordingly, as
the end of loop 88 begins to enter passageway 68B at the point were
suture 60 passes therethrough, the overlapping suture 60 locks by a
secure wedged frictional engagement against or within the opening
to passageway 68B of proximal anchor 56. To release this locked
engagement, retraction line 94 is pulled on which draws loop 88
away from passageway 68B, thereby releasing the locked engagement
with proximal anchor 56. As will be discussed below in greater
detail, by selectively drawing on proximal end 84 of suture 60 and
retraction line 94, any slack in suture 60 between suture anchors
56 and 58 can be removed. Suture 60 can then be locked to proximal
anchor 56.
[0053] In the loaded state shown in FIG. 8, anchors 56 and 58 are
mounted on needle 18 as previously discussed. Due to the required
operating slack, suture 60 extending between anchors 56 and 58
typically extends outside of passage 50 of needle 18. In contrast,
as shown in FIGS. 8 and 9, suture 60 and retraction line 94, after
passing through loop 88, travel within channel 66 of proximal
anchor 56. After exiting channel 66, as shown in FIG. 2, suture 60
and retraction line 94 continue traveling proximally with passage
50 of needle 18 and exit therefrom at proximal end 12 of handle 16.
If desired, as shown in FIG. 1, the free end of suture 60 and
retraction line 94 can be inserted into the proximal end of slot 36
on handle 16. In the retracted proximal position, lever 37 biases
the free ends of suture 60 and retraction line 94 against handle 16
so as to hold suture 60 and retraction line 94 in place. As lever
37 is advanced into the distal position, the free ends of suture 60
and retraction line 94 are released by lever 37 for selective
removal from insertion device 10.
[0054] Referring now to FIGS. 10-18, the operation of insertion
device 10 will now be described. It is understood that for FIGS.
10-14, while only needle 18 and suture anchor assembly 20 are
shown, the entire insertion device 10 is being applied. It is also
appreciated that before insertion device 10 is used, suture 60 is
secured to proximal anchor 56 and distal anchor 58 and the entire
suture anchor assembly 20 is loaded on needle 18 as described
above.
[0055] FIG. 10 depicts an exemplary soft tissue site 96 in need of
repair. In this example, a meniscus 98 is shown having a tear 100.
Meniscus 98 comprises cartilage lying between the joint surfaces of
the femur and the tibia. As shown in FIG. 11, meniscus 98 has a
substantially triangular transverse cross-section having an inside
surface 102 and an outside surface 104. Insertion device 10 is
positioned to penetrate meniscus 98 from inside surface 102.
[0056] Specifically, needle 18 penetrates inside surface 102 of
meniscus 98, passes through tear 100, and exits through outside
face 104. Needle 18 is advanced to the extent that all of distal
anchor 58 extends past outside face 104 of meniscus 98. The soft
tissue of meniscus 98 sufficiently encloses around needle 18 such
that as needle 18 is retracted from meniscus 98, the exposed neck
78 and flanges 70 catch on outside face 104 of meniscus 98. Distal
anchor 58 is thus dislodged from needle 18 by overcoming the
resistance force of prong 80 and sliding distally off of needle
18.
[0057] As shown in FIG. 12, after needle 18 is retracted from
meniscus 98, distal anchor 58 is disposed on outside surface 104 of
meniscus 98. Because of the way distal anchor 58 is secured to
suture 60 (described above with reference to FIG. 7), distal anchor
58 generally rotates so that the elongated side of distal anchor 58
is biased against outside face 104 of meniscus 98. This orientation
helps ensure that distal anchor 58 does not unintentionally pass
through the puncture formed by needle 18.
[0058] Proximal anchor 56 is now secured to meniscus 98 at a short
distance from distal anchor 58. Specifically, as shown in FIG. 13,
needle 18 is placed on inside surface 102 of meniscus 98 at a point
along tear 100 spaced apart from the initial insertion of needle
18. Needle 18 is then passed through inside surface 102, tear 100
and outside surface 104.
[0059] As depicted in FIG. 14, once needle 18 is properly
positioned, lever 37 on handle 16 is advanced from the retracted
proximal position to the advanced distal position. In so doing,
sleeve 34 is distally advanced. Distal end face 69 of sleeve 34
biases against proximal anchor 56 and distally advances proximal
anchor 56 through meniscus 98 along needle 18. Sleeve 34 continues
to advance until proximal anchor 56 is released from needle 18
beyond outside surface 104 of meniscus 98. Alternatively, sleeve 34
need only advance proximal anchor 56 beyond outside surface 104 of
meniscus 98. Proximal anchor 56 can then be removed from needle 18
by simply withdrawing needle 18 back through meniscus 98. In yet
another alternative, sleeve 34 can function to initially advance
proximal anchor 56 to the distal end of needle 18. Proximal anchor
56 can then be placed using the same method as discussed above with
regard to distal anchor 58.
[0060] With needle 18 removed, proximal anchor 56 is disposed on
outside surface 104 of meniscus 98. Because of the way proximal
anchor 56 is secured to suture 60 (described above with reference
to FIG. 7), proximal anchor 56 will generally rotate so that the
elongated bottom surface 65 of proximal anchor 56 is biased against
outside surface 104 of meniscus 98 (FIG. 15). Again, this
orientation helps ensure that proximal anchor 56 does not pass
through the puncture formed by needle 18.
[0061] FIG. 15 shows both proximal anchor 56 and distal anchor 58
disposed on outside surface 104 of meniscus 98. After needle 18 is
retracted from meniscus 98, insertion device 10 is removed from the
operating environment. In so doing, suture 60 and retraction line
94 are withdrawn out of needle 18 so as to freely extend outside of
the body of the patient. In one embodiment, suture 60 and
retraction line 94 can be different colors or have different
markings thereon so as to be discernable therebetween.
[0062] Once proximal anchor 56 and distal anchor 58 are positioned,
the length of suture 60 between proximal anchor 56 and distal
anchor 58 is adjusted. Generally, extra slack is provided in the
length of suture 60 between proximal anchor 56 and distal anchor 58
to ensure easy placement of anchors 56 and 58. Once anchors 56 and
58 are placed, however, the extra slack must be removed so that
suture 60 holds tear 100 sufficiently tightly closed to ensuring
healing thereat.
[0063] With reference to FIG. 15, to remove the slack in suture 60
between anchors 56 and 58, the surgeon holds the exposed proximal
end 84 of suture 60 taut. The surgeon then simultaneously pulls
back on both opposing free ends 95 and 97 of retraction line 94,
thereby pulling on loop 88 of suture 60. As depicted in FIG. 16,
because proximal end 84 of suture 60 is held taut, loop 88 enlarges
under the tension of retraction line 94 by drawing in slack from
between anchors 56 and 58.
[0064] In turn, as depicted in FIG. 17, to remove the slack from
loop 88, proximal end of 84 of suture 60 is pulled while retraction
line 94 is slowly released at a complementary rate. If required,
the above process is repeated until all of the slack is removed
from between anchors 56 and 58.
[0065] As long as retention line 94 remains in loop 88, it is
possible to selectively unlock suture 60 from proximal anchor 56.
To do so, the surgeon simply applies tension to retention line 94
to loosen loop 88. The surgeon can then increase or decrease the
slack in suture 60. Thus, retention line 94 allows a surgeon to
make any necessary readjustments to the length of suture 60 before
finally locking suture 60.
[0066] As shown in FIG. 18, when the desired length of suture 60
between proximal anchor 56 and distal anchor 58 is achieved,
retraction line 94 is removed from loop 88 by pulling on one of
free ends 95 or 97 thereof. Exposed proximal end 84 of suture 60 is
then tensioned so as to securely lock suture 60 to proximal anchor
56 as previously discussed. Suture 60 is then clipped proximal of
proximal anchor 56 and removed.
[0067] The methods and apparatuses of the present invention may be
applicable in a wide variety of surgical applications, not limited
to the example of the meniscal repair described above. Furthermore,
it will be appreciated that a single anchor or more than two
anchors may be utilized without departing from the scope of the
present invention. For example, suture anchor delivery system 10
may be used to employ a series of anchors within a soft tissue
site. That is, a plurality of anchors may be slidably received in
needle 18. Each anchor can be advanced to the distal end of needle
18 and then inserted as described above.
[0068] It is also appreciated that suture anchor assembly 20 or a
discrete suture anchor thereof can be used independently of
insertion device 10. For example, arthroscopic or other
conventional procedures can be used to manually stitch soft tissue
using a suture. Once the stitching is completed, the suture can be
secured in place by use of a suture anchor described herein.
[0069] Set forth below in FIGS. 19-22 are a number of alternative
configurations for securing a suture to a suture anchor. It is
appreciated that these configurations can be implemented into
suture anchors 56 and/or 58 or can be used independently thereof.
Like elements between the various embodiments will be identified by
like reference characters.
[0070] Depicted in FIG. 19 is a suture anchor 106. While anchor 106
is shown as a rectangular block, it will be appreciated that anchor
106 may have any desired configuration depending on the particular
application. For example, anchor 106 can have a circular,
triangular, elliptical, or any other polygonal or irregular
transverse cross section. Anchor 106 can also have threads, barbs,
or other fixation structure that are well known in the art for
securing anchor 106 to bone. Furthermore, anchor 106 can be
uniquely configured for attachment with an insertion tool. Anchor
106 comprises a top surface 112 and an opposing bottom surface 114
each extending between a front face 116 and an opposing back face
118. A single passageway 108 extends through anchor 106 from top
surface 112 to bottom surface 114.
[0071] A suture 120 is provided having a proximal end 122 and an
opposing distal end 124. A portion of suture 120 is formed into a
loop 126. Loop 126 is passed through passageway 108 so as to
project beyond bottom surface 114. Proximal end 122 of suture 120
is then passed through loop 126. A retraction line 130 also passes
through loop 126. Although retraction line 130 is depicted as a
continuous loop, retraction line 130 can also comprise a linear
line that is looped through loop 126.
[0072] By holding one of proximal end 122 or distal end 124 taut
and then pulling on the other, loop 126 begins to retract into
passageway 108. This retraction continues until the overlapping
sections of suture 120 at loop 126 lock with anchor 106 by a secure
wedged frictional engagement against or within the opening to
passageway 108 of anchor 106. If desired, an enlarged
concentrically disposed recess bore can be formed at the opening of
passageway 108. In this embodiment, the overlapping sections of
suture 120 are received within the recess bore before locking
against the constricted portion of passageway 108.
[0073] As with proximal anchor 56 previously discussed, retraction
line 130 facilitates selective unlocking of the suture 120 from
anchor 106. Retraction line 130 also enables selective removal or
addition of slack from or to either proximal end 122 or distal end
124 of suture 120. Once suture 120 is positioned and/or locked at
the desired location, retraction line 130 can be removed by being
pulled through loop 126.
[0074] Depicted in FIG. 20 is a suture anchor 131 having a
plurality of passageways 132A, 132B, and 132C each extending
between top surface 112 and bottom surface 114. Suture 120 extends
through anchor 131. Specifically, beginning with distal end 124,
suture 120 passes down through passageway 132C. A portion of suture
120 is then coiled over itself so as to form a closed loop 134
below bottom surface 114. Proceeding proximally, suture 120 then
extends up through passageway 132A and then down through passageway
132B. Suture 120 then passes through closed loop 134. Retraction
line 130 also passes through loop 134.
[0075] By pulling on end 122 and/or end 124 of suture 120, loop 134
constricts about the portion of suture 120 extending therethrough,
thereby locking suture 120 to suture anchor 131. Retraction line
130 enables selective expansion of loop 134 so as to unlock suture
120 from anchor 131 and to enable selective adjustment of slack in
suture 120.
[0076] Depicted in FIG. 21 is a suture anchor 136. A pair of spaced
apart passageways 140A and 140B extend between top surface 112 and
bottom surface 114. A passageway 142 extends between front face 116
and back face 118. Beginning at distal end 124, suture 120 passes
down through passageway 140B and then back up through passageway
140A. As such, the portion of suture 120 between passageways 140A
and 140B is formed into a loop 138. Proceeding proximally, suture
120 then extends from back face 118 through passageway 142 and then
through loop 138. Retraction line 130 also passes through loop
138.
[0077] By pulling on end 122 and/or end 124 of suture 120, loop 138
retracts into passageways 140A and/or 140B until the remaining
portion of loop 138 securely biases the portion of suture 120
passing therethrough against the exterior surface of suture anchor
136, thereby securely locking suture 120 to suture anchor 136.
Again, retraction line 130 enables selective expansion of loop 138
so as to unlock suture 120 from anchor 136 and to enable selective
adjustment of slack in suture 120.
[0078] Depicted in FIG. 22, suture anchor 136 is again shown having
suture 120 passing therethrough in substantially the same fashion
as discussed above with regard to FIG. 21. The primary distinction
is that loop 138 of FIG. 21 has been coiled in FIG. 22 into a
closed loop 144. Proximal end 122 of suture 120 and retraction line
130 both pass through closed loop 144. In this embodiment, as with
the embodiment depicted in FIG. 20, by pulling on end 122 and/or
end 124 of suture 120, loop 144 constricts about the portion of
suture 120 extending therethrough, thereby locking suture 120 to
suture anchor 136. Retraction line 130 enables selective expansion
of loop 144 so as to unlock suture 120 from anchor 136 and to
enable selective adjustment of slack in suture 120.
[0079] Finally, depicted in FIG. 23 is suture anchor 106 having
suture 120 passing therethrough in substantially the same fashion
as previously discussed with regard to FIG. 19. The one distinction
is that in this embodiment both proximal end 122 and distal end 124
of suture 120 pass through loop 126 to facilitate locking of suture
120 to suture anchor 106. It is appreciated that in each of the
disclosed embodiment, the proximal end, distal end, or both ends of
the suture can be passed through the loop formed on the suture to
facilitate locking with the corresponding anchor.
[0080] It is appreciated that the retractions lines disclosed
herein can also be used for selectively unlocking sutures secured
on other configurations of suture anchors. For example, U.S. Pat.
No. 5,693,060 discloses suture anchors having a suture selectively
locked thereon. A retraction line can be passed through loop 24 of
the disclosed sutures to selectively unlock the suture and to
adjust slack therein. For purposes of disclosure, columns 4-6 of
U.S. Pat. No. 5,693,060 and all of the drawings thereof are hereby
incorporated by reference. Other alternative suture anchors that
can also be used in association with the present invention are
disclosed in United States Publication No. US 2002/0019649 A1,
published Feb. 14, 2002. For purposes of disclosure, paragraphs
[0101]-[0206] of United States Publication No. US 2002/0019649 A1
and all of the drawings thereof are hereby incorporated by
reference.
[0081] The various anchors of the present invention can be made in
a variety of different ways using a variety of one or more
different materials. By way of example and not by limitation, the
various anchors can be made from medical grade bioabsorbable or
non-absorbable materials. Examples of bioabsorbable materials
include homopolymers and copolymers of lactide, glycolide,
trimethylene carbonate, caprolactone, and p-dioxanone and blends or
other combinations thereof and equivalents thereof. Examples of
non-absorbable materials include metals such as stainless steel,
titanium, Nitinol, cobalt, alloys thereof, and equivalents thereof
and polymeric materials such as non-absorbable polyesters,
polyamides, polyolefins, polyurethanes, and polyacetals and
equivalents thereof.
[0082] The anchors may be manufactured as a single piece using
standard machining or molding techniques. Alternatively, discrete
elements of the anchors can be manufactured separately and then
connected together using conventional methods and materials. In
such an embodiment, each discrete element may be made from the same
or different materials.
[0083] The present invention may be embodied in other specific
forms without departing from its spirit or essential
characteristics. The described embodiments are to be considered in
all respects only as illustrative and not restrictive. The scope of
the invention is, therefore, indicated by the appended claims
rather than by the foregoing description. All changes which come
within the meaning and range of equivalency of the claims are to be
embraced within their scope.
* * * * *