WO2008021770A2 - Medical device for repair of tissue and method for implantation and fixation - Google Patents
Medical device for repair of tissue and method for implantation and fixation Download PDFInfo
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- WO2008021770A2 WO2008021770A2 PCT/US2007/075236 US2007075236W WO2008021770A2 WO 2008021770 A2 WO2008021770 A2 WO 2008021770A2 US 2007075236 W US2007075236 W US 2007075236W WO 2008021770 A2 WO2008021770 A2 WO 2008021770A2
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- meniscus
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0469—Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/064—Surgical staples, i.e. penetrating the tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0487—Suture clamps, clips or locks, e.g. for replacing suture knots; Instruments for applying or removing suture clamps, clips or locks
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0403—Dowels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0404—Buttons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/044—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors with a threaded shaft, e.g. screws
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0445—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors cannulated, e.g. with a longitudinal through-hole for passage of an instrument
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0446—Means for attaching and blocking the suture in the suture anchor
- A61B2017/0458—Longitudinal through hole, e.g. suture blocked by a distal suture knot
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0446—Means for attaching and blocking the suture in the suture anchor
- A61B2017/0459—Multiple holes in the anchor through which the suture extends and locking the suture when tension is applied
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
- A61B2017/0464—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors for soft tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0469—Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery
- A61B2017/0475—Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery using sutures having a slip knot
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B2017/0496—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials for tensioning sutures
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/064—Surgical staples, i.e. penetrating the tissue
- A61B2017/0646—Surgical staples, i.e. penetrating the tissue for insertion into cartillege, e.g. meniscus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/064—Surgical staples, i.e. penetrating the tissue
- A61B2017/0647—Surgical staples, i.e. penetrating the tissue having one single leg, e.g. tacks
- A61B2017/0648—Surgical staples, i.e. penetrating the tissue having one single leg, e.g. tacks threaded, e.g. tacks with a screw thread
Definitions
- the present invention relates to medical devices for repairing tissue and more specifically to devices which facilitate tissue regeneration and to surgical methods for the implantation and fixation thereof.
- Various parts of the human body are comprised of fibrocartilage.
- Fibrocartilage forms the disc, meniscus, and labrums, located in the spine and temporomandibular joint, knee, and shoulder and hip, respectively. Additionally, fibrocartilage is present in other parts of the human body, such as fingers, wrists, and ankles. Fibrocartilage is a resilient, compressive tissue capable of accepting and withstanding high loads imparted during bodily movement. Generally, fibrocartilage is found between two adjacent bones, such as the locations set forth hereinabove.
- menisci The fibrocartilage of the knee forms menisci 10, 11, shown in FIG. 1.
- Menisci 10, 11 are semi-lunar, wedge-shaped portions of tissue that sit atop the tibia and articulate with the tibia and femur during movement of the tibia and/or femur relative to one another.
- Menisci 10, 11 have top articulating surfaces 12 which interface with the femoral condyle and bottom articulating surfaces (not shown) which interface with tibia plateau 14.
- Menisci 10, 11 function as shock absorbers between the femur and the tibia to distribute compressive and shear loads from the curved condyles of the femur to the relatively flat plateau of the tibia.
- each menisci 10, 11 has three distinct zones of vascularity, shown in FIG. 2, red zone 16, red/white zone 18, and white zone 20.
- Red zone 16 comprised of approximately the outer peripheral third of each meniscus, is rich in blood supply and is highly vascular.
- Red/white zone 18, comprised of the area between the red zone and white zone, has some limited vascularity with limited blood supply. As a patient ages, the size of the white zone 20 will increase and the size of red zone 16 and red/white zone 18 will correspondingly decrease.
- tears due to the high stress imparted on fibrocartilage, injuries and pathologies can occur in the fibrocartilage which are manifested in the form of tears, such as tear 22 shown in FIG. 3, defects, and/or degeneration. Tears may occur due to the existence of prior defects in the fibrocartilage, shear loading of the fibrocartilage, and/or compounded loading resulting from repetitive compressive loading occurring over a period of time. Additionally, fibrocartilage can deteriorate as a result of aging, resulting in hard and/or soft areas which further facilitate the creation of tears therein.
- One common procedure for treating fibrocartilage tears is to surgically remove part or all of the fibrocartilage surrounding the tear, such as removing a portion of the meniscus.
- These procedures known as meniscectomies or partial meniscectomies when performed on the meniscus, are commonly utilized in the case of "unrepairable” or complex tears such as radial tears, horizontal tears, and vertical longitudinal tears occurring outside the vascular zone. Additionally, these procedures may be performed when there is fibrillation and/or degeneration caused by defects in an avascular or limited vascular area, since these injuries are unlikely to heal. As shown in FIG.
- a partial meniscectomy may be performed in which the meniscus is removed along lines extending inwardly toward the inner meniscus from the peripheral ends of tear 22.
- implants may be inserted to replace the portion of the meniscus removed during the procedure.
- Meniscectomies, and similar fibrocartilage procedures typically provide immediate pain relief and restoration of knee function to a patient.
- cartilage wear on the condylar or tibial plateau surfaces and the eventual development of osteoarthritis may occur as a result of the meniscectomy. Additionally, the onset of osteoarthritis may lead to more chronic conditions resulting in the need for a total knee replacement procedure.
- Another method for treating fibrocartilage tears, including tears of the meniscus is to attempt to surgically repair the torn tissue. This technique is most commonly performed when the tear is a longitudinal vertical tear located in the vascular area of the fibrocartilage, such as red zone 16 of meniscus 10, shown in FIG. 2.
- the tear walls may be rasped or trephined to induce bleeding. Additionally, the tear walls may be stabilized with sutures or other retention devices.
- the stent of Schwartz '926 is designed with an interior, longitudinally-extending bore and external threads or ribs.
- Stent 24, shown in FIG. 6, is inserted through fibrocartilage tissue and positioned to extend across walls 26, 28 of fibrocartilage tear 22, shown in FIG. 5, to secure the sides of the tear together.
- the threads or ribbing of stent 24, denoted by slanted, dashed lines in FIG. 6, effectively retain the stent, and corresponding tear walls 26, 28, in position.
- the outer wall of stent 24 includes a plurality of apertures, not shown, extending from the interior of the longitudinal bore to the exterior surface of stent 24. These apertures allow for the dissemination of blood, biological factors, and cells from stent 24, as blood, biological factors, and cells flow through stent 24 from a vascular region of the fibrocartilage to a semi- vascular or avascular tear region of the fibrocartilage.
- the dissemination of blood, biological factors, and cells via stent 24 stimulates tissue regeneration. While the device disclosed in Schwartz '926 is effective, the walls of the fibrocartilage tear may actually be pushed apart during implantation of the stent and prevent effective healing of the tear.
- the present invention relates to medical devices for repairing tissue and more specifically to devices which facilitate tissue regeneration and to surgical methods for the implantation and fixation of such devices.
- the medical device is an elongate conduit that includes a longitudinal bore extending therethrough to facilitate the transfer of blood, biological factors, and cells from a vascular region of tissue to a tear or damaged area located in an avascular and/or semi- vascular region of tissue.
- a filament and/or filaments are attached to the conduit and are positioned to fixate the adjacent tear walls in mutual engagement.
- a series of conduits are connected via a filament and/or filaments to facilitate the implantation of multiple conduits while fixating the adjacent tear walls.
- the present medical device allows for the provision of blood, biological factors, and cells from a vascular region of tissue to a torn or damaged area located in an avascular and/or semi- vascular region of tissue and provides for fixation of the tear walls or damaged area and the securement of a conduit in a desired position.
- the conduit itself anchors one side of the primary tear fixation, the conduit can be located with one end adjacent the plane of a tear, damaged area, or implant, allowing the conduit to efficiently deliver blood, biological factors, and cells thereto and increase the rapidity of the healing process.
- the conduit can also provide for delivery of biological treatments, drugs, and other substances, such as blood, platelet rich plasma, growth factors, or cells, to the tear or defect area through the bore of the conduit.
- biological treatments, drugs, and other substances such as blood, platelet rich plasma, growth factors, or cells.
- the desired substance can be delivered before, during, or after the conduit is inserted and positioned.
- the present invention provides a medical device including an elongate conduit formed of biocompatible material, the device body having an exterior, a first end, a second end, and a longitudinal bore; and a filament attached to the device body, whereby the filament can be positioned to fixate tissue in a desired position.
- the present invention provides a method for implanting a medical device in tissue, the tissue having a first area of vascularity and a second area of vascularity, the vascularity of the second area being less than the vascularity of the first area, the method including the steps of: inserting a device into tissue, the device including a conduit and a filament attached to the conduit, the conduit having a first end, a second end, and a bore therethrough; positioning the first end of the conduit adjacent the outside wall of a torn or damaged area of tissue; positioning the filament through the tissue to secure the conduit and fixate the tissue in a desired position; and securing the filament.
- the present invention provides a method for implanting a medical device in tissue, the method including the steps of: inserting a device into tissue, the device including a plurality of conduits and a filament attached to the conduits, the conduits having a first end, a second end, and a bore therethrough; positioning the first end of each of the conduits adjacent the outside wall of a torn or damaged area of tissue; positioning the filament through the tissue to secure the conduit and fixate the tissue in a desired position; and securing the filament.
- FIG. 1 is a perspective view of the menisci and other knee anatomy
- FIG. 2 is a partial cross-sectional view along line 2-2 of FIG. 1 ;
- FIG. 3 is a perspective view of the menisci, including a tear in the lateral meniscus and other knee anatomy;
- FIG. 4 is a perspective view of the menisci and other knee anatomy following a partial meniscectomy of the lateral meniscus;
- FIG. 5 is a partial cross-sectional view along line 5-5 of FIG. 3;
- FIG. 6 is a partial cross-sectional view of the lateral meniscus of FIG. 3 including a prior art stent
- FIG. 7 is a plan view of an exemplary embodiment of the conduit of the present invention.
- FIG. 7A is a plan view of a conduit according to another exemplary embodiment
- FIG. 7B is a cross-sectional view along line 7B-7B of FIG. 7A;
- FIG. 7C is a plan view of a conduit according to another exemplary embodiment
- FIG. 8 is a plan view of a conduit according to another exemplary embodiment
- FIG. 9 is a plan view of a conduit according to another exemplary embodiment.
- FIG. 10 is a perspective view of an exemplary embodiment of a device incorporating a conduit according to another exemplary embodiment
- FIG. 11 is a perspective view of the device of FIG. 10 implanted in a meniscus
- FIG. 12 is a cross-sectional view along line 12-12 of FIG. 11 ;
- FIG. 13 is a perspective view of a device according to another exemplary embodiment
- FIG. 14 is a perspective view of the device of FIG. 13 implanted in a meniscus
- FIG. 15 is a perspective view of a device according to another exemplary embodiment
- FIG. 16 is a elevational view along line 16-16 of the device of FIG. 15;
- FIG 17 is a perspective view of the device of FIG. 10 implanted in a meniscus and secured according to another exemplary embodiment
- FIG. 18 is a perspective view of the device of FIG. 10 implanted in a meniscus according to another exemplary embodiment
- FIG. 19 is a perspective view of the device of FIG. 10 implanted in a meniscus and secured according to another exemplary embodiment
- FIG. 19A is a perspective view of the device of FIG. 10 implanted in a meniscus and secured according to another exemplary embodiment
- FIG. 20 is a perspective view of the device of FIG. 10 implanted in a meniscus and secured according to another exemplary embodiment
- FIG. 21 is a perspective view of the device of FIG. 10 implanted in a meniscus and including a scaffold replacement;
- FIG. 22 is a perspective view of a device according to another exemplary embodiment
- FIG. 23 is a perspective view of a device according to another exemplary embodiment implanted in a meniscus
- FIG. 24 is a perspective view of a filament and stops used in the device of
- FIG. 23 is a diagrammatic representation of FIG. 23.
- FIG. 25 is a perspective view of an exemplary stop of the device of FIG. 23.
- FIG. 26 is a perspective view of a stop according to another exemplary embodiment.
- FIG. 7 shows conduit 30 according to one embodiment of the present invention.
- Conduit means only an elongate body and does not define any other structural features.
- Conduit 30 includes a first end 32, a second end 34, and through bore 36 extending from first end 32 to second end 34.
- bore 36 has a non-circular cross-section.
- Conduit 30 can be manufactured from any biocompatible material.
- Conduit 30 has a length from first end 32 to second end 34 as small as 2 mm, 3 mm, or 4 mm and as large as 10 mm, 12 mm, or 15 mm.
- conduit 30 may be coated with biocompatible substances to facilitate tissue regeneration, improve circulation, or achieve any other biologically desirable responses.
- interior 38 of through bore 36 may be coated with an anti-coagulant to prevent coagulation of blood within through bore 36, thereby promoting the delivery of blood to a torn or damaged tissue area.
- bore 36 may contain a scaffold material to promote tissue regeneration or to improve healing outcomes.
- Conduit 30 may also be made of any porous material which would allow for the transfer of blood from a vascular to an avascular area as a result of physiological processes in the patient's body.
- a porous construct may be two-piece, shown in FIG. 7A and 7B, wherein first end 32' of conduit 30' is closed and constructed of a porous material, while the remainder of conduit 30' is made of a substantially solid, biocompatible material. This allows for blood or other fluid to enter second end 34 via bore 36 and exit through the porous material at end 32'.
- conduit 30 may be constructed entirely of porous material and lack bore 36, as shown in FIG. 7C. Fluid would enter conduit 30 from end 34 and travel, due to the interconnected porosity of the porous material, through conduit 30, exiting at first end 32. The flow of fluid may be directed by altering the material properties of the porous material along the length of conduit 30.
- conduit 30 further includes a plurality of apertures 42, 44 at end 32 of conduit 30.
- Apertures 42, 44 extend from interior 38 of through bore 36 to exterior surface 46.
- Apertures 42, 44 may receive filament 48, as shown in FIG. 10 and described in detail hereinbelow, for securing conduit 30 within tissue and fixating a tear, damaged tissue, or an implant in a desired position.
- filament is inclusive of single or multiple strands, threads, fibers, strings, wires or sutures.
- apertures 42, 44 are positioned adjacent one another on the same side of conduit 30, i.e., along the axial length of conduit 30, and receive filament 48 in the same manner described in detail herein below.
- conduit 30 may include slot 47, shown in FIG. 7, in end 32 of conduit 30 which allow for the exit of blood or other substances therethrough. Slot 47 aids the surgeon in positioning conduit 30 within tissue by eliminating the need for the surgeon to precisely align end 32 of conduit 30 with the plane of a tear, damaged area, or implant to provide blood thereto. As long as the surgeon positions a portion of slot 47 in or adjacent the plane of the tear, damaged area, or implant, blood or other substances will be delivered to the tear, damaged area, or implant.
- slot 47 provides an increased length, only a portion of which the surgeon must locate adjacent the tear, damaged tissue, or implant, thereby increasing the likelihood of a successful implantation.
- end 32 is perforated with a plurality of apertures of sufficient size and spacing to provide a substantially similar benefit as slot 47, described above.
- conduit 30' includes closed end 32' perforated by a plurality of apertures 49 of sufficient size to allow for the dissemination of blood therethrough.
- the entire length of conduit 30 is perforated by a plurality of apertures 49 of sufficient size to allow for the dissemination of blood therethrough.
- FIGS. 8-10 show conduits 50, 60, 70, respectively, according to additional embodiments of the present invention.
- Conduits 50, 60, 70 include several features which are identical to the embodiment of FIG. 7 discussed above and identical reference numerals have been used to indicate identical or substantially identical features therebetween.
- Conduits 50, 60, shown in FIGS. 8 and 9, respectively, include surface features, such as outwardly extending ribs 52 and outwardly extending thread 62, respectively, on external surface 46 of conduits 50, 60. Ribs 52 and threads 62 provide an additional mechanism for fixation of conduits 50, 60 within tissue. As shown in FIG.
- conduit 70 further includes nose 72.
- Nose 72 is separated from main body portion 74 via tapering section 76.
- nose 72 facilitates insertion of conduit 70 into the tissue and can be positioned such that nose 72 is in a vascular tissue, such as the synovium, while ribs 52 and/or threads 62 provide fixation. Additionally, nose 72 may itself be tapered to further ease insertion.
- conduit 70 includes filament 48 attached thereto, forming completed medical device 78.
- the devices of the present invention are an improvement over the stent disclosed in U.S. Patent Application Serial No. 10/558,926 to Schwartz, which is assigned to the assignee of the present invention, the entire disclose of which is incorporated by reference herein.
- Filament 48 may be manufactured from any flexible, biocompatible material, such as polyglactin, polydioaxanone, surgical gut, nylon, polypropeylyene, polyglycolic acid, polylactic acid, co-polymers, Vicryl®, and Ethibond Excel®. Vicryl® and Ethibond Excel® are registered trademarks of Johnson & Johnson Corporation, One Johnson & Johnson Plaza, New Brunswick, New Jersey 08933. Filament 48 and conduit 70 may be preassembled or may be assembled by the surgeon before or during surgery. Filament 48 and conduit 70 may be connected together by inserting a first end (not shown) of filament 48 into interior 38 of through bore 36.
- a first end not shown
- the first end of filament 48 is then threaded through aperture 42 and wrapped half-way around exterior surface 46 until the first end reaches aperture 44.
- filament 48 is wrapped substantially entirely around exterior surface 46.
- the first end of filament 48 is then inserted through aperture 44 into interior 38 of through bore 36.
- First end of filament 48 is then pulled out of through bore 36 through end 32.
- exterior surface 46 includes a groove (not shown) on at least a portion of exterior surface 46 transverse to the longitudinal axis of conduit 70. As filament 48 is pulled from end 32 of conduit 70, filament 48 tightens, seating filament 48 within the groove.
- the first end of filament 48 is inserted through aperture 42 into interior 38 of through bore 36 and pulled out of through bore 36 through aperture 44.
- a portion of filament 48 extends through interior 38 of through bore 36 in a direction transverse to the longitudinal axis of conduit 70.
- device 80 as shown in FIGS. 15-16, includes conduit 82 having nose 72, through bore 36, and overmolded end 84.
- Device 80 include several features which are identical to the embodiment of FIG. 10 discussed above and identical reference numerals have been used to indicate identical or substantially identical features therebetween.
- overmolded end 84 includes apertures 86, 88 extending from rim 90 of first end 32 toward second end 34 along a portion of conduit 82.
- Apertures 86, 88 may be formed to be slightly larger than filaments 92, 94 and, during manufacturing, shrink around the ends of filaments 92, 94 to retain the ends therein. Utilizing overmolded end 84 prevents filaments 92, 94 from extending into through bore 36 and provides an uninterrupted path for the flow of blood and other substances therethrough. In another embodiment, a biocompatible adhesive is used to secure the ends of filaments 92, 94 within apertures 86, 88. Once device 80 is assembled, device 80 may be inserted into the meniscus as described in detail hereinbelow. [0053] The method for inserting the devices will now be described in detail with reference to medical device 78, shown in FIG. 10. Device 78 may be inserted into meniscus 10 as shown in FIGS.
- the entire procedure is performed arthroscopically using standard techniques, procedures, and devices.
- Device 78 is inserted from the interior side of tear 98 at insertion point 100, located between inner rim 102 of meniscus 10 and the interior side of tear 98. In another exemplary embodiment, the insertion point is the face of tear 98.
- Device 78 is inserted along a plane substantially parallel to the bottom articulation surface of meniscus 10. While device 78 may be inserted at any angle relative to the bottom articulation surface of meniscus 10, insertion along a plane substantially parallel to the bottom articulation surface provides the optimal purchase for conduit 70. In one embodiment, insertion of device 78 is performed using a compatible insertion tool, such as those disclosed in U.S. Patent Application Serial No.
- the insertion tool (not shown) may be inserted into the interior of through bore 36 to retain device 78 thereon and advance device 78 through meniscus 10.
- the insertion device is cannulated.
- the use of a cannulated insertion tool allows for the delivery of biological substances through the insertion device and conduit 70 directly to the torn or damaged area of meniscus 10.
- device 78 is inserted utilizing any technique known technique, including an all-inside technique, inside- out technique, and/or an outside-in technique.
- conduit 70 may be positioned adjacent a tear, damaged area, or regenerative or replacement meniscus implant 134 with nose 72 extending from outer wall 106 of meniscus 10. In this position, nose 72 extends into the synovium and/or other tissue surrounding the knee joint, which is a highly vascular membrane surrounding the knee.
- blood, biological factors, cells, and fluid from the synovium and/or other tissue surrounding the knee joint can be delivered to a torn or damaged area of meniscus 10 via conduit 70.
- filament 48 extends from insertion point 100. Ends (not shown) of filament 48 are then looped over tear 98 and inserted in meniscus 10 at second insertion points 103, 104, located between outer wall 106 of meniscus 10 and tear 98 or between inner rim 102 of meniscus 10 and tear 98, using, for example, a needle. The ends of filament 48 are advanced through meniscus 10 at diverging angles until the ends exit outer wall 106 at points 108, 110. The ends of filament 48 are then tightened by pulling the ends away from outer wall 106. In addition to the stitching method set out above, filament 48 can be positioned via any method known to one of ordinary skill in the art, including any horizontal or vertical mattress suture technique.
- first end 114 of filament 48 is secured to a retention device, such as buckle 116, by inserting first end 114 through an aperture in end 118 of buckle 116 and tying end 114 to form knot 120.
- Second end 122 of filament 48 may then be secured to buckle 116 by inserting second end 122 through opening 128 in buckle 116, looping end 122 around bar 126, through opening 124, and threading end 122 back through opening 128. In this manner, filament 48 is looped back onto itself and retained by friction within buckle 116. For large tears or damaged areas, multiple devices may be implanted in accordance with the method described hereinabove.
- first end 114 and second end 122 of filament 48 are secured, via knots for example, to hooks 130. Hooks 130 are curved and terminate at sharpened tips 132. At any time during the procedure, tips 132 are inserted through the upper articulation surface 12 of meniscus 10.
- filament 48 acts to fixate tear 98 and secure conduit 70 in position, as described hereinabove.
- first end 114 and second end 122 of filament 48 are pulled tight through top articulating surface 12 of meniscus 10.
- Knot 115 is tied using first end 114 and knot 117 is tied using second end 122 to secure the walls of tear 98 in mutual engagement. Due to the physical properties of meniscus 10, knots 115, 117 will sink into top articulating surface 12, preventing any damage to or pain in the patient's knee.
- any other securement method or device disclosed herein may potentially be used atop top articulating surface 12 to secure ends 114, 122 of filament 48 together and fixate tissue in the desired position.
- conduit 70 is positioned within meniscus 10 in a similar manner as described hereinabove.
- slide 136 is used to secure conduit 70 in position within meniscus 10 and fixate tear 22 or regenerative or replacement meniscus implant 134, shown in FIG. 21, slide 136 is used.
- Slide 136 has a body with a bore extending therethrough and flange 138 projecting from an end of the body of slide 136.
- First end 114 of filament 48 is threaded through the bore of slide 136 toward flange 138.
- Second end 122 of filament 48 is then secured to first end 114 of filament 48 via slipknot 140.
- slipknot 140 By pulling first end 114 of filament 48 away from outer wall 106 of meniscus 10, slipknot 140 moves toward outer wall 106 and pushes slide 136 into meniscus 10. Once filament 48 is taught, flange 138 will contact outer wall 106 of meniscus 10, preventing slipknot 140 from sliding further. Slipknot 140 can then be tightened to secure ends 114, 122 of filament 48 together. Once secured, ends 114, 122 of filament 48 may be trimmed and the removed portion discarded.
- the devices of the present invention may be implanted as an alternative to a meniscectomy, the devices may also be implanted in native meniscus tissue or a regenerative or replacement meniscus implant following a meniscectomy to encourage and/or promote tissue regeneration and, when a regenerative or replacement meniscus implant is used, the device may further fixate the implant to the natural meniscus tissue, as shown in FIG. 21.
- regenerative or replacement meniscus implant 134 is fixated via filament 48 in position against natural meniscus 10.
- Implant 134 further receives blood, biological factors, cells, and other fluids from the red zone 16 of meniscus or, in another embodiment shown in FIG. 18, from the synovium via conduit 70.
- two conduits 70, 70' are connected together via filament 142.
- a first end of filament 142 is inserted through interior 38 of through bore 36 of conduit 70, pulled from aperture 42, and wrapped half way around conduit 70. The end is then inserted through aperture 44, shown in hidden lines in FIG. 10, and pulled from interior 38 of through bore 36, as discussed in detail hereinabove.
- Filament 142 is then inserted through interior 38' of through bore 36' of conduit 70', pulled from aperture 42', and wrapped half way around conduit 70'. The end is then inserted through aperture 44' and pulled from interior 38' of through bore 36', as discussed in detail hereinabove.
- the ends of filament 142 are then connected together via slipknot 144, forming device 146. While two conduits are depicted in FIG. 13, any number of conduits needed to facilitate tissue regeneration and healing may be connected together. Generally, as the size of the tear or damaged area increases, the number of conduits needed to facilitate tissue regeneration and healing will correspondingly increase.
- conduits 70, 70' are inserted individually relative to tear 148 using the same procedure discussed hereinabove with respect to conduit 70 and tear 98.
- filament 142 remains partially exposed along top articulating surface 12 of meniscus 10.
- Filament 142 is then tightened, by pulling end 150 of filament 142 away from top articulating surface 12 until the inner and outer walls of tear 148 are in mutual engagement. The interference of top articulating surface 12 of meniscus 10 with the tightening of filament 142 secures conduits 70, 70' in their desired positions.
- a knot (not shown) is used to fix filament 142, and correspondingly secure device 146, in position.
- slipknot 144 is used to retain filament 142 in the tightened position. To tighten filament 142, end 150 is pulled away from top articulating surface 12 of meniscus 10 and, at the same time, slipknot 144 slides downwardly toward top articulating surface 12. Once slipknot 144 is tightened, excess filament 142 can be trimmed and discarded.
- filament 142 and slipknot 144 will become integrated with meniscus preventing any adverse effects, such pain or discomfort during articulation of the condyles of the femur against top articulation surface 12 and filament 142.
- a series of devices 78 shown in FIG. 10, may be utilized with a single tear. Each device 78 can then be fixated in the manner discussed hereinabove providing additional tension on tear 98, shown in FIG. 11 , and placing knot 112 outside of the contact area of meniscus 10 and against outer wall 106.
- conduits 70, 70' are shown.
- conduits 70, 70' are inserted through tear 170 individually and prior to attachment of filament 172.
- conduits 70, 70' are inserted through the one of the walls forming tear 170 closest to outer wall 106 of meniscus 10.
- noses 72, 72' of conduits 70, 70' may extend from outer wall 106 of meniscus 10, as described in detail above.
- filament 172 and stops 174 may be secured to conduits 70, 70'. While described and depicted herein as utilizing two conduits 70, 70' and two stops 174, any number of conduits may be used in conjunction with any number of stops to provide the desired fixation of tear 170.
- stop 174 include apertures 176, 178 extending therethrough.
- stop 174 is formed as an elongate rod.
- stops 174 allow for fluid to pass through bores 36, 36' (FIG. 13) of conduits 70, 70'.
- stops 174 may be formed in any other geometric shape, such as square rods or circular discs.
- stop 174' is shown in the form of a circular disc have apertures 176', 178' extending therethrough. Stop 174' may replace stop 174 and may be utilized in the same manner as described herein with reference to stop 174.
- first end 180 of filament 172 is threaded through aperture 176 of stop 174.
- First end 180 is then threaded through aperture 178 of stop 174.
- a second stop 174 is then provided and connected to filament 172 in a similar manner.
- First end 180 of filament 172 is then used to tie slipknot 182 on filament 172 and the remainder of first end 180 is then trimmed.
- stops 174 are inserted into meniscus 10. Specifically, longitudinal axes 184 (FIG. 25) of stops 174 are aligned with bores 36, 36' of conduits 70, 70' and inserted at insertion points 190. Since stops 174 have an outer diameter that is less then the inner diameter of bores 36, 36', once aligned, stops 174 may be inserted through bores 36, 36', respectively, and then through outer wall 106 of meniscus 10. Stops 174 may be inserted in unison or, alternatively, may be inserted individually. For example, one of stops 174 may be inserted through bore 36 of conduit 70 and outer wall 106. Then, the other of stops 174 may be inserted through bore 36' of conduit 70' and outer wall 106.
- end 186 and a portion of filament 172 extends from articulating surface 12 of meniscus 10. End 186 of filament 172 may then be pulled away from articulating surface 12. As end 186 is pulled away from articulating surface 12 of meniscus 10, slipknot 182 of filament 172 tightens as filament 172 slides through apertures 176, 178 of stops 174 and bores 36, 36' of conduits 70, 70'. In this manner, pulling on end 186 of filament 172 allows for the tightening of the entire construct to fixate the opposing sides of tear 170 adjacent one another and fixate conduits 70, 70' in their desired positions. Once tightened, end 186 of filament 172 may be trimmed to remove any excess material.
- conduit 160 in FIG. 22, includes filament 162 secured through apertures in projection 164.
- Projection 164 may be overmolded, as described in detail above, or may allow for sliding movement of filament 162 within projection 164. If sliding movement of filament 162 is allowed, end 166 of filament 162 could be pulled away from projection 164 drawing end 168 toward projection 164.
- projection 164 is replaced by apertures located adjacent one another on the same side of conduit 160, i.e., along the axial length of conduit 160. These apertures accept filament 162 in the same manner as apertures 42, 44, described in detail above with reference to FIGS. 7-10. The use of either projection 164 or the apertures located on the same side of conduit 160 provides for eccentric loading of conduit 160 when filament 162 finally secured, which impedes pull out of conduit 160.
Abstract
Description
Claims
Priority Applications (5)
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AU2007284135A AU2007284135B2 (en) | 2006-08-07 | 2007-08-06 | Medical device for repair of tissue and method for implantation and fixation |
CA2660287A CA2660287C (en) | 2006-08-07 | 2007-08-06 | Medical device for repair of tissue and method for implantation and fixation |
US15/074,572 US20160199054A1 (en) | 2006-08-07 | 2016-03-18 | Medical device for repair of tissue and method for implantation and fixation |
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US11/462,728 US20080033487A1 (en) | 2006-08-07 | 2006-08-07 | Medical device for repair of tissue and method for implantation and fixation |
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2007
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- 2007-08-06 US US12/310,059 patent/US9289201B2/en active Active
- 2007-08-06 CA CA2660287A patent/CA2660287C/en not_active Expired - Fee Related
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2008
- 2008-09-12 US US12/283,474 patent/US20090018561A1/en not_active Abandoned
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2010
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Also Published As
Publication number | Publication date |
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AU2007284135B2 (en) | 2014-01-23 |
EP2051662A4 (en) | 2015-03-18 |
US20100249835A1 (en) | 2010-09-30 |
AU2007284135A1 (en) | 2008-02-21 |
US20090018561A1 (en) | 2009-01-15 |
US20080033487A1 (en) | 2008-02-07 |
US20160199054A1 (en) | 2016-07-14 |
US9289201B2 (en) | 2016-03-22 |
EP2051662A2 (en) | 2009-04-29 |
WO2008021770A3 (en) | 2008-10-23 |
US20100036389A1 (en) | 2010-02-11 |
CA2660287A1 (en) | 2008-02-21 |
CA2660287C (en) | 2012-12-18 |
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