CN215079095U

CN215079095U - Soft tissue fixing device

Info

Publication number: CN215079095U
Application number: CN202120081487.6U
Authority: CN
Inventors: 刘勇; 王坤; 曾敬松
Original assignee: Nathon Biotechnology Beijing Co ltd
Current assignee: Nathon Biotechnology Beijing Co ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-12-10
Anticipated expiration: 2031-01-13

Abstract

The utility model discloses a soft tissue fixing device, including anchor and connecting wire, the anchor includes outside part and inside part, the inside part is equipped with axial through-hole, the inside part stretches into in the outside part, the lower extreme of inside part is equipped with presses the end, the outside part corresponds the end of impressing and is equipped with presses the groove, the lateral wall of outside part is equipped with a through wires hole, the connecting wire is the bistrand, the one end of the connecting wire of bistrand forms the go-between, through-hole and through wires hole are passed in proper order to the one end of the connecting wire of bistrand, the outside part is connected with the inside part and makes the end of impressing compress tightly the connecting wire at the inslot of impressing. The patient of the utility model can not have the problems of kneeling pain and the like after the door-shaped nail is implanted; the suture is not needed, and the operation steps of the operation are simplified; the anchor device in the utility model can avoid knotting and fixing, and provides multiple choices for complex conditions in the operation.

Description

Soft tissue fixing device

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a soft tissue fixing device, be applicable to bone and soft tissue's in the bone surgery and be connected fixedly.

Background

Complete or incomplete separation of soft tissues such as ligaments and tendons from bones is a relatively common injury; after ligament, tendon or other soft tissues are subjected to ligament repair and reconstruction surgery, in the early rehabilitation process of a patient, due to the fact that the soft tissues and bones are not firmly fixed, relative sliding movement of the soft tissues occurs or an implanted fixing device is loosened or even falls off, and proper healing can be delayed or inhibited.

At present mainly through arthroscopic surgery restoration, common repair mode has two kinds, one kind is that U type nail (door type nail) is fixed, and soft tissue is fixed in to this type of implant, is with soft tissue (like anterior cruciate ligament) embedding nail body both sides "stand" middle back, uses specialized tool to strike "stand" and goes into the appropriate degree of depth of bone face, pushes down the soft tissue that will fix through terminal "crossbeam" and accomplishes fixedly. This type of fixation is accompanied by certain drawbacks: after implantation, the tail end part of the implant protrudes out of the bone surface to cause irritation of other surrounding soft tissues or discomfort of the front knee of a patient, and the front knee pain of the patient occurs when the patient squats or kneels; the implant has a large transverse span and the surgical incision causes a large amount of additional trauma during implantation. Another type of fixation is anchor fixation, the general steps of using a suture anchor for soft tissue fixation: after the anchor body is implanted into the bone surface, the suture needle or the special thread passing tool is utilized to pass the carried suture through the soft tissue to be fixed, and two free ends of the same suture are knotted to complete the fixation. This type of fastening also involves several disadvantages: the operation process is complicated and time-consuming, and the suturing and knotting processes are manually completed by operators; the suture diameter is small, and the possibility of cutting soft tissues exists.

Accordingly, an improved method and apparatus for attaching soft tissue to bone is of particular importance.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a soft tissue fixing device.

The soft tissue fixing device comprises an anchor and a connecting wire, wherein the anchor comprises an outer part and an inner part, the inner part is provided with an axial through hole, the inner part extends into the outer part, a press-in end is arranged at the lower end of the inner part, a press-in groove is arranged at the end, corresponding to the press-in end, of the outer part, a threading hole is arranged on the side wall of the outer part, the connecting wire is double-stranded, a connecting ring is formed at one end of the double-stranded connecting wire, one end of the double-stranded connecting wire sequentially penetrates through the through hole and the threading hole, and the outer part is connected with the inner part to enable the press-in end to compress the connecting wire in the press-in groove.

Preferably, in the above technical solution, the outer member is provided with an axial hollow portion, the press-in groove is provided at a lower side of the hollow portion and is communicated with the hollow portion, and both the press-in groove and the hollow portion are cylindrical.

Preferably, the diameter of the press-in groove is smaller than that of the hollow part.

Preferably, in the above technical solution, the inner member and the press-in end are both cylindrical, and the diameter of the press-in end is smaller than that of the inner member.

According to the preferable technical scheme, the outer wall of the outer part is provided with annular inverted tooth structures distributed along the axial direction.

In the above technical solution, preferably, the outer wall of the outer member is provided with an axial wire guiding groove corresponding to the threading hole, and the wire guiding groove penetrates the outer wall of the outer member upward.

Above technical scheme is preferred, the outer wall of outside part correspond the through wires hole is equipped with the recess, the through wires hole is located in the recess.

In the above technical solution, preferably, the lower portion of the hollow portion is provided with an internal thread, and the lower portion of the inner member is provided with an external thread connected to the internal thread.

Above technical scheme is preferred, the upper end of inside part is equipped with regular hexagon protruding structure.

The utility model has the advantages and positive effects that: the utility model provides a soft tissue fixing device, wherein connecting wires are preset in an inner part and an outer part of an anchor, when in use, ligaments or tendons penetrate into a connecting ring positioned at the near end of the outer part, after the anchor is implanted, the connecting wires are tensioned, and then the inner part is screwed by using an installation handle; the whole body of the implanted anchor nail is embedded below the surface of the bone, so that the problems of kneeling pain and the like of a patient after the implantation of a door-shaped nail can be avoided; the anchor only needs to pass the ligament or the tendon through the connecting ring, and does not need to be sutured, so the operation steps of the operation are simplified; the anchor device in the utility model can avoid knotting and fixing, and provides multiple choices for complex conditions in the operation.

Drawings

Fig. 1 is a schematic structural view of a soft tissue fixation device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an external component according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an inner member according to an embodiment of the present invention.

1. Pressing the groove; 2. an internal thread; 3. a hollow portion; 4. threading holes; 5. annular inverted teeth; 6. a wire guide groove; 7. a high-side portion; 11. a suture loop; 21. a pressing end; 22. an external thread; 23. a through hole; 24. a regular hexagonal structure.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The present embodiment provides a soft tissue fixation device, as shown in fig. 1-3, comprising an anchor and a connecting wire, the connecting wire being a medical tape or suture. The anchor comprises an outer part and an inner part, wherein the inner part is provided with an axial through hole 23, the inner part extends into the outer part, the lower end of the inner part is provided with a pressure-input end 21, the outer part is provided with a pressure-input groove 1 corresponding to the pressure-input end 21, the side wall of the outer part is provided with a threading hole 4, the connecting wire is bifilar, one end of the bifilar connecting wire forms a connecting ring, and the connecting ring is a suture ring 11 or a tape ring. One end of the double-strand connecting wire sequentially penetrates through the through hole 23 and the threading hole 4, and the outer part and the inner part are connected to enable the pressing end 21 to press the connecting wire in the pressing groove 1. Wherein, the threading hole 4 is suitable for ensuring that the suture or the thread belt can pass through smoothly and can move relatively easily. The inner part is provided with an axial through hole 23 in the middle, so that double threads or thread belts can penetrate into the axial through hole, and the double threads or thread belts can move relative to the through hole 23.

Before the outer side part is implanted and fixed, a preset pore passage needs to be drilled in advance at a corresponding fixed position on the surface of a bone, and the outer side part can be of various size structures to adapt to different pore sizes, so that different bone conditions and adaptation crowds can be better matched.

In particular, the outer part is provided with an axial hollow 3, so that the inner part can be inserted therein. The press-in groove 1 is arranged on the lower side of the hollow part 3, so that a press-in end 21 on the lower part of the inner part can be matched with the press-in groove 1, the press-in groove 1 is communicated with the hollow part 3, and the press-in groove 1 and the hollow part 3 are both cylindrical. Alternatively, the press-in groove 1 has a diameter smaller than the diameter of the hollow part 3.

Specifically, the inner member and the press-in end 21 are both cylindrical, and the diameter of the press-in end 21 is smaller than that of the inner member. Insertion fitting with the outer member press-in groove 1 is achieved to press the suture or tape.

Specifically, the outer wall of the outer side part is provided with annular inverted teeth 5 distributed along the axial direction. The outer side part comprises annular inverted tooth 5 structures distributed along the axial direction around the outer wall, so that the outer side part can be smoothly installed in the corresponding position fixed with soft tissues in bones, and the outer side part needs to be implanted and fixed in a driving mode.

Specifically, the outer wall of the outer member is provided with an axial wire guiding groove 6 corresponding to the wire threading hole 4, and the wire guiding groove 6 penetrates through the outer wall of the outer member upwards. The threading holes 4 are positioned on the corresponding wire grooves 6. The width of the wire guide groove 6 is required to be not less than the diameter of the threading hole 4, and the depth is preferably such that the thread or the thread band can slide relatively when being positioned thereon.

Optionally, the outer wall of the outer part is provided with a groove corresponding to the threading hole 4, and the threading hole 4 is located in the groove. The side walls of the recess form a high edge portion 7. the high edge portion 7 of the outer part ensures that the suture or suture strand is not cut by the bone wall during implantation of the anchor.

Specifically, the lower part of the hollow part 3 is provided with an internal thread 2, and the lower part of the inner member is provided with an external thread 22 connected with the internal thread 2. The internal thread 2 is matched with the external thread 22, the pressing force of the pressing end 21 is increased, and the ligament is effectively prevented from being loosened after the suture or the thread belt presses the ligament.

Specifically, the upper end of the inner part is provided with a regular hexagon convex structure. The regular hexagon convex structure at the upper end of the inner part is matched with the regular hexagon structure 24 for installing the handle, so that the purpose of screwing the inner part into the outer part is realized.

The anchor shank (inner or outer) may be constructed from a variety of materials. In one example of implementation, the material may have sufficient physical properties to allow implantation of the nail body into bone without damaging the anchor structure. The nature of the material depends on the specific type of anchor. Non-limiting examples of materials that may be used to make the anchor include metals such as titanium, polymers such as Polyetheretherketone (PEEK), and combinations thereof. In one example of implementation, the anchor may be absorbable, but may also be non-absorbable, or a combination thereof.

Furthermore, the suture or the thread belt is a high-strength suture or a high-strength thread belt which is commonly used in orthopedics department and has different thread diameter specifications so as to adapt to different requirements.

The working process of the embodiment: in this embodiment, the tendon or ligament is fixed by a suture, and the double-strand suture is extended from the installation handle, passes through the through hole 23 of the inner member, and then passes through the threading hole 4 of the outer member, and extends to the distal end of the anchor along the wire groove 6 to form the suture loop 11, and during the implantation of the anchor, the high-side portion 7 of the outer member can ensure that the suture is not cut by the bone wall.

When the operation is carried out to the tendon or soft tissue needs to be fixed to the bone surface, the tendon or ligament to be fixed penetrates through the suture ring 11, the tendon or ligament to be fixed is stretched, and after sufficient pre-tightening force is ensured, the double-strand suture is pulled tightly from the installation handle. After the double-strand suture is tensioned, the tendon or ligament to be fixed is attached to the bone surface, the mounting handle is attached to the regular hexagon structure 24 of the inner part and is screwed in clockwise, the pressing-in end 21 of the inner part is gradually attached to the pressing-in groove 1 of the outer part, the suture is compressed, redundant suture is cut off, and the tendon or ligament is fixed to the bone surface.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A soft tissue fixation device characterized by: the anchor comprises an anchor and a connecting wire, wherein the anchor comprises an outer part and an inner part, the inner part is provided with an axial through hole, the inner part extends into the outer part, the lower end of the inner part is provided with a press-in end, the outer part is provided with a press-in groove corresponding to the press-in end, the side wall of the outer part is provided with a threading hole, the connecting wire is bifilar, one end of the bifilar connecting wire forms a connecting ring, one end of the bifilar connecting wire sequentially penetrates through the through hole and the threading hole, and the outer part is connected with the inner part to enable the press-in end to compress the connecting wire in the press-in groove.

2. The soft tissue fixation device of claim 1, wherein: the outer part is provided with an axial hollow part, the press-in groove is arranged on the lower side of the hollow part and communicated with the hollow part, and the press-in groove and the hollow part are both cylindrical.

3. The soft tissue fixation device of claim 2, wherein: the press-in groove has a diameter smaller than that of the hollow portion.

4. The soft tissue fixation device of claim 2, wherein: the inner side part and the press-in end are both cylindrical, and the diameter of the press-in end is smaller than that of the inner side part.

5. The soft tissue fixation device of claim 1, wherein: and the outer wall of the outer part is provided with annular inverted tooth structures distributed along the axial direction.

6. The soft tissue fixation device of claim 5, wherein: the outer wall of the outer part is provided with an axial wire guide groove corresponding to the threading hole, and the wire guide groove penetrates through the outer wall of the outer part upwards.

7. The soft tissue fixation device of claim 1, wherein: the outer wall of the outer part is provided with a groove corresponding to the threading hole, and the threading hole is positioned in the groove.

8. The soft tissue fixation device of claim 2, wherein: the lower part of the hollow part is provided with internal threads, and the lower part of the inner part is provided with external threads connected with the internal threads.

9. The soft tissue fixation device of claim 1, wherein: the upper end of the inner part is provided with a regular hexagon convex structure.