This disclosure relates to a method and system for providing a bone cerclage.
Cerclages are used to maintain the relative position of fractured bone fragments to promote healing. While cerclages can be used relative to any fractured bone, they are commonly used to promote healing of femoral fractures. Femoral fractures are sometimes caused, for example, by traumatic injuries or as the result of an orthopedic procedure such as a hip replacement. A cerclage is used to fix fractured bone fragments relative to one another, which, again, promotes healing.
Known cerclages include materials such as cable (i.e., wire) or fabric, and are provided by wrapping the cable or fabric around a fractured bone a single time. After wrapping, the cable or fabric is then locked into place relative to the bone, such as with a plug or clip.
This disclosure details a method and system for providing a bone cerclage. The disclosed method includes wrapping a piece of material around a bone, and securing that material relative to the bone. The wrapped material provides a bone cerclage, which maintains the relative position of fractured bone fragments to promote healing.
A method for providing a fractured bone with a bone cerclage according to an exemplary aspect of the present disclosure includes, among other things, wrapping a folded piece of suture around a bone at least once, and securing the suture to the bone.
In a further non-limiting embodiment of the foregoing method, the suture is wrapped around the bone at least twice.
In a further non-limiting embodiment of either of the foregoing methods, the wrapping step comprises wrapping the suture around the bone a first time by moving a folded end around the bone in a first direction, and wrapping the suture around the bone a second time by moving first and second free ends of the suture around the bone in a second direction opposite the first direction.
In a further non-limiting embodiment of any of the foregoing methods, the folded end is pushed around the bone using a suture passer.
In a further non-limiting embodiment of any of the foregoing methods, the first and second free ends are pulled around the bone by the suture passer after the folded end is pushed around the bone.
In a further non-limiting embodiment of any of the foregoing methods, the securing step includes securing the suture to the bone by tying a knot.
In a further non-limiting embodiment of any of the foregoing methods, the securing step includes providing a sliding knot between the folded end and the first and second free ends.
In a further non-limiting embodiment of any of the foregoing methods, the sliding knot is partially pre-tied and includes an eyelet provided within a sheath.
In a further non-limiting embodiment of any of the foregoing methods, the sheath includes at least one barb configured to resist removal of suture from the sheath.
In a further non-limiting embodiment of any of the foregoing methods, the wrapped suture is tensioned to tighten it relative to the bone.
In a further non-limiting embodiment of any of the foregoing methods, the tensioning step includes using a tensioner to pull the first and second ends relative to the sliding knot to tighten the wrapped suture.
In a further non-limiting embodiment of any of the foregoing methods, the securing step includes securing the suture to the bone without tying any knots.
In a further non-limiting embodiment of any of the foregoing methods, the securing step includes anchoring the suture to the bone using a knotless anchor.
In a further non-limiting embodiment of any of the foregoing methods, a portion of the suture providing a first wrap around the bone is secured to the bone by a suture-retaining feature formed in the bone.
In a further non-limiting embodiment of any of the foregoing methods, the suture is a self-cinching suture including at least one splice, and the securing step includes pulling a portion of the self-cinching suture through the at least one splice to tension to the suture to the bone.
In a further non-limiting embodiment of any of the foregoing methods, a bone screw maintains a position of the suture as the suture is wrapped around the bone, and the step of securing the suture to the bone includes tightening the suture against the bone using the bone screw.
In a further non-limiting embodiment of any of the foregoing methods, the suture passes through an eyelet of a bone plate as the suture is wrapped around the bone.
A system for providing a bone cerclage according to an exemplary aspect of the present disclosure includes, among other things, a suture and a suture passer. The suture passer is configured to wrap the suture around a bone a first time by moving a first portion of the suture around the bone in a first direction. The suture passer is further configured to wrap the suture around the bone a second time by moving a second portion of the suture around the bone in a second direction opposite the first direction.
In a further non-limiting embodiment of either of the foregoing systems, the suture passer includes a handle, a cannula, and a moveable suture carrier. The moveable suture carrier has an eyelet for receiving the suture and being moveable relative to the cannula.
A suture passer according to an exemplary aspect of the present disclosure includes, among other things, a handle, a cannula projecting distally from the handle. The cannula includes a portion that is curved to conform to a bone anatomy. The suture passer further includes a moveable suture carrier at least partially received within the cannula. The moveable suture carrier is moveable relative to the cannula and has an eyelet for receiving suture.
The embodiments, examples and alternatives of the preceding paragraphs, the claims, or the following description and drawings, including any of their various aspects or respective individual features, may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments, unless such features are incompatible.
The drawings can be briefly described as follows:
This disclosure details a method and system for providing a bone cerclage. The disclosed method includes wrapping a piece of material around a bone, and securing that material relative to the bone. The wrapped material provides a bone cerclage, which maintains the relative position of fractured bone fragments to promote healing.
This disclosure includes several embodiments of a bone cerclage where the material providing the cerclage is suture.
Again, this disclosure includes several embodiments that relate to a method and system for providing a suture wrap cerclage. In one non-limiting example of the disclosed method, a surgeon, for example, may make use of a collection of components, referred to herein as a “system.” Among other things, an example system includes suture 26, which forms the suture wrap cerclage 20.
An external view of an example suture 26 is illustrated in
In general, the suture 26 includes a multifilament cover 28 formed of a plurality of braided fibers of ultrahigh molecular weight polyethylene (UHMWPE) 30 and fibers of polyester 32. The cover 28 surrounds a core 34 formed of twisted fibers of ultrahigh molecular weight polyethylene (UHMWPE). While one example type of suture 26 is shown and described, it should be understood that other types of suture come within the scope of this disclosure.
In addition to suture, the example system also includes a suture passer, such as the suture passer 36 illustrated in
The moveable suture carrier 42 has an eyelet 48 for receiving suture, and is moveable relative to the cannula 40 in response to a corresponding movement of an actuation member 50 adjacent a proximal end of the handle 38. The suture carrier 42 has a curve adjacent the distal end 44 substantially following a constant radius R2, which corresponds to the expected contour of a bone, and is substantially the same as the radius R1. Further, in this example, the actuation member 50 is formed as a circular ring. It should be understood that the actuation member 50 could have other configurations.
In one example, the suture carrier 42 is integrally formed with the actuation member 50. In that case, the suture carrier-actuation member structure would be formed of a semi-rigid material, such as a relatively high strength plastic material, to allow the structure to pass through the cannula 40. In other examples, the suture carrier 42 and actuation member 50 may be formed separately from one another, and, in that case, can be formed of metallic material. This disclosure is not limited to any particular material type, however.
The actuation member 50 is slidable relative to the handle 38 in a distal direction D1 and a proximal direction D2. In response to movement of the actuation member 50 in the distal direction D1, the suture carrier 42 is moveable in a direction D3 away from a distal end 44 of the cannula 40 Likewise, in response to movement of the actuation member 50 in the proximal direction D2, the suture carrier moves in a direction D4 toward the distal end 44 of the cannula 40. Movement of the suture carrier 42 increases the ease of passing suture around a bone.
The example system may further include a suture tensioner, such as the suture tensioner 52 illustrated in
In general, as illustrated in
While
A first example method of providing the suture wrap cerclage 20 will now be explained with reference to
Initially, a piece of suture 26 (
With the folded end 74 placed in the eyelet 48, the distal end 44 of the cannula 40 is maneuvered around a bone 22, as illustrated in
Next, the surgeon maintains the position of the folded end 74, which has been wrapped around the bone, and feeds the two free ends 76, 78, which are still in their original position, through the eyelet 48, as illustrated in
By wrapping the folded end 74 around the bone in a first direction while maintaining the position of the free ends 76, 78, and then wrapping the free ends 76, 78 about the bone in a second, opposite direction while maintaining the position of the folded end 74, the result is a single piece of folded suture that has been wrapped around the bone twice. Further, because the suture 26 is folded, the above technique provides a cerclage having the effective width of the four pieces of suture, which increases the coverage and effectiveness of the suture wrap cerclage 20.
Further, the above technique only requires a suture passer to be maneuvered around the bone and removed once, which reduces the time required to wrap the suture and reduces risk of further injury to adjacent soft tissue during surgery. While the suture 26 is wrapped around the bone 22 twice in the above example, the suture 26 could be wrapped only once or additional times depending on the severity of the fracture, for example.
Once wrapped around the bone 22, the suture 26 is then secured to the bone. In one example, a sliding knot is provided between the folded end 74 and the first and second free ends 76, 78. To provide the sliding knot, the folded end 74 is folded over an adjacent portion of the lengths 75, 77 (
Alternatively, the sliding knot 81 could be partially pre-tied. In particular, the eyelet 80 could be provided within a sheath 83, as illustrated in
Further, as illustrated in
The sliding knot 81 is then tensioned. In this example, tension is applied by wrapping the first and second free ends 76, 78 around the spool 60 of the suture tensioner 52, and rotating the adjustment wheel 58 until the desired tension is reached, as generally illustrated in
The result is a suture wrap cerclage 20, as substantially illustrated in
In the above-described method, the suture wrap cerclage is provided by tying at least one knot, and without implanting any structure in the body, with the exception of the suture 26. Other aspects of this disclosure, however, are “knotless,” meaning the securing step includes securing the suture 26 to the bone 22 without tying any knots.
One example knotless arrangement is shown in
In the example of
In general, the knotless suture anchor 134 is positioned by an inserter 136 (
In some examples, the bone 122 may be machined to prevent slippage of the suture 132 from the first location 126 to the second location 130. In one example, illustrated in
In general, the self-cinching suture 222 includes a first end 226, a second end 228, the splice 224, and a fixation device 230 (sometimes referred to as a “button”). In an example method, the second end 228 of the self-cinching suture is wrapped around a bone 232 one or more times (here, twice), and fed through the splice 224. In this example, the second end 228 is also fed through the fixation device 230. The second end 228 may be wrapped around the bone 232 using the above-discussed techniques.
Once wrapped, the second end 228 is pulled relative to the first end 226, which tightens the self-cinching suture 222 and cinches the suture 222 against the bone 232 to provide a suture wrap cerclage. Once tightened, the fixation device 230 maintains the position of the suture 222 relative to the bone 232. While one example self-cinching suture has been described, other types of self-cinching sutures come within the scope of this disclosure.
In
Another example suture wrap cerclage 420 is illustrated in
The suture wrap cerclages of this disclosure provide a reliable and effective bone cerclage, which promotes healing of fractured bones. Further, the disclosed methods and systems allow surgeons to provide suture wrap cerclages in an efficient manner without sacrificing consistency or quality.
It should be understood that terms such as “proximal” and “distal” are used consistent with their art-accepted meaning. These terms should not otherwise be considered limiting.
Although the different examples have the specific components shown in the illustrations, embodiments of this disclosure are not limited to those particular combinations. It is possible to use some of the components or features from one of the examples in combination with features or components from another one of the examples.
One of ordinary skill in this art would understand that the above-described embodiments are exemplary and non-limiting. That is, modifications of this disclosure would come within the scope of the claims. Accordingly, the following claims should be studied to determine their true scope and content.
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