CN211243528U

CN211243528U - Anchor with wire

Info

Publication number: CN211243528U
Application number: CN201921713926.XU
Authority: CN
Inventors: 宋磊
Original assignee: Qingdao Jiuyuan Medical Technology Co ltd
Current assignee: Qingdao Jiuyuan Medical Technology Co ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-08-14
Anticipated expiration: 2029-10-14

Abstract

The utility model relates to a suture anchor, which comprises an anchor main body, wherein the outer side wall of the anchor main body is provided with threads, the inner side of the anchor main body is provided with a front cavity, the front cavity is in a truncated cone shape, and the large end opening of the front cavity is arranged on the front end surface of the anchor main body; the rivet main body corresponding to the front cavity is provided with a plurality of rivet notches, and the front end of the rivet main body is divided into a plurality of elastic pieces by the rivet notches; an anchor expansion head is arranged in the front cavity, the anchor expansion head comprises an expansion part, the expansion part is a truncated cone, the front end of the expansion part is a big end, the front end of the expansion part is provided with a positioning part, and the rear end of the expansion part is provided with a suture connecting part; the rear end of the expansion part is provided with an external buckle extending towards the outer side of the expansion part, the side wall of the inner cavity is provided with a plurality of internal buckles matched with the external buckles, and the internal buckles and the external buckles are matched with each other to ensure that the anchor expansion head can only slide towards the rear end of the anchor body in a one-way manner; the rear end of the anchor nail body is provided with a channel for the suture to pass through; the anchor can realize good fixed of soft tissue and bone.

Description

Anchor with wire

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a strip line anchor nail.

Background

The anchor with the thread is used for any place needing to reconnect soft tissue and bone, the action mechanism of the anchor with the thread is firstly fixed on the bone through the self-thread of the anchor, then the thread is penetrated through the soft tissue through the suture needle of the anchor, and the soft tissue is fixed on the anchor through knotting, so that the fixation of the soft tissue and the bone is realized.

Patent CN108403175A provides a suture anchor, which has two support wings at the tail of the anchor, when the suture is tightened, the support wings are opened, and the anchor is fixed. However, the suture is fixed by the self-threaded-supporting wing-tissue of the anchor, the three are mutually fixed, the probability of looseness exists among the three, the looseness of one fixation can cause the looseness of soft tissues, and the looseness can not be avoided. In actual use, the supporting wing is opened by the pulling force of suture, the suture strength is limited, the supporting wing can not be opened completely, the supporting wing is not opened completely, the supporting wing does not play a role in fixing, but the fixing is influenced, after the supporting wing is fixed with tissue (such as muscle), because the tissue and skin have elasticity, the pulling force can be increased or reduced by the movement, the opening amplitude of the supporting wing can be increased due to the increase of the pulling force, after the amplitude is increased, the effective length of a wiring harness fixed by the anchor and the tissue (such as muscle) can be side length, the fixing force is reduced, the opening amplitude of the supporting wing can be reduced due to the reduction of the pulling force, and at the moment, the supporting wing. Along with the movement of the human body and the elasticity of the tissue, the wire harness rubs in the support wing traction hole, and the service life of the wire harness is shortened.

Different from other types of bone fixing modes, fusion and fixation between soft tissue and bone are the key points for successful operation, and the requirements of postoperative early movement, muscle exercise and load bearing can be met only through good fixation. Therefore, it is urgently needed to develop a new fixing mode to realize good fixing and meet the requirements of early exercise, muscle exercise and load bearing in the later period.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a can be better form stable effectual fixed anchor with wire between soft tissue and bone is provided.

In order to solve the technical problem, the technical scheme of the utility model is that: a suture anchor comprises an anchor body, wherein the outer side wall of the anchor body is provided with threads, the inner side of the anchor body is provided with a front cavity, the front cavity is in a truncated cone shape, and the large end of the front cavity is opened on the front end surface of the anchor body; the anchor main body corresponding to the front cavity is provided with a plurality of anchor notches, and the front end of the anchor main body is divided into a plurality of elastic pieces by the plurality of anchor notches; an anchor expansion head is arranged in the front cavity and comprises an expansion part, the expansion part is a truncated cone, the front end of the expansion part is a big end, a positioning part is arranged at the front end of the expansion part, and a suture connecting part is arranged at the rear end of the expansion part; the rear end of the expansion part is provided with an external buckle extending towards the outer side of the expansion part, the side wall of the front cavity is provided with a plurality of internal buckles matched with the external buckles, and the internal buckles and the external buckles are matched with each other to ensure that the anchor expansion head can only slide towards the rear end of the anchor body in a one-way manner; the rear end of the anchor nail body is provided with a channel for a suture to pass through.

Preferably, the expansion part is a truncated cone.

Preferably, the positioning portion is a cone, and a bottom surface of the positioning portion is fixedly connected with the expansion portion.

Preferably, the bottom surface of the positioning portion and the bottom surface of the expansion portion are completely overlapped with each other.

Preferably, the distal end surface of the anchor main body is a slope surface adapted to the side surface of the expanded portion.

Preferably, the suture connecting portion is provided with a plurality of threading holes.

As a preferred technical scheme, a plurality of the internal buckles are uniformly distributed on the side wall of the front cavity from front to back.

The anchor with the wire can realize good fixation of soft tissues and bones and meet the requirements of later-stage early movement, muscle exercise and load bearing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural view of a suture anchor;

FIG. 2 is a cross-sectional view of section A-A of FIG. 1;

FIG. 3 is an enlarged partial view of area C of FIG. 2;

FIG. 4 is a schematic structural view of the anchor body;

FIG. 5 is a schematic structural view of an anchor expansion head;

FIG. 6 is a schematic view of the suture anchor tip unopened and in relation to the bone structure;

FIG. 7 is a schematic view of the suture anchor tip in an open position and in a state associated with bone structure;

FIG. 8 is a schematic view of the handle and suture anchor in use.

Detailed Description

As shown in fig. 1 and 2, the suture anchor comprises an anchor body 1, wherein the outer side wall of the anchor body 1 is provided with threads 11, the inner side of the anchor body 1 is provided with a front cavity, the front cavity is in a truncated cone shape, and the large end of the front cavity is opened on the front end surface of the anchor body 1. The anchor body 1 corresponding to the front cavity is provided with a plurality of anchor notches 12, and the front end of the anchor body 1 is divided into a plurality of elastic pieces by the plurality of anchor notches 12. The front cavity is provided with an anchor expansion head 2, as shown in fig. 5, the anchor expansion head 2 comprises an expansion portion 23, the expansion portion 23 is a truncated cone, and most preferably, the expansion portion 23 is a truncated cone. The rear end of the expansion part 23 is provided with an external buckle 22 extending to the outside thereof, as shown in fig. 2 and 3, the side wall of the front cavity is provided with a plurality of internal buckles 14 matched with the external buckle 22, and the plurality of internal buckles 14 are uniformly distributed on the side wall of the front cavity from front to back. The inner clasp 14 and the outer clasp 22 cooperate such that the anchor expansion head 2 can only slide in one direction towards the rear end of the anchor body 1.

The front end of the expanding portion 23 is a large end and the front end of the expanding portion 23 is provided with a positioning portion 24, preferably, the positioning portion 24 is a cone and the bottom surface thereof is fixedly connected with the expanding portion 23. The conical positioning part not only can reduce the resistance of the anchor nail entering the bone, but also can play a role in guiding and positioning. Preferably, the bottom surface of the positioning portion 24 completely overlaps with the bottom surface of the expanded portion 23. The front end surface of the anchor main body 1 is a slope 13 adapted to the side surface of the expanded portion 23.

The rear end of the expansion part 23 is provided with a suture connecting part; preferably, the suture connecting portion is provided with a plurality of threading holes 21. The rear end of the anchor body 1 is provided with a passage for passing a suture therethrough, as shown in fig. 3.

The anchor with the wire is provided with a new fixing mode, the anchor body 1 is provided with threads 11, and the anchor is screwed into bone tissue by the threads; the inclined plane 13 of the front end of the anchor main body 1 is matched with the side surface of the expansion part 23 to slide, when the anchor is screwed in, the front end of the anchor expansion head 2 is pressed by bone, the anchor expansion head 2 slides backwards, the inclined planes of the anchor expansion head and the anchor expansion head slide, and the inclined plane structure provides internal expansion force for the outward expansion of the lower end of the anchor main body 1. When the anchor expansion head 2 is pressed by bone tissues, the anchor expansion head moves to the rear end side of the anchor main body 1 to form internal expansion force, and the elastic sheet can be expanded outwards by the arrangement of the anchor notch 12 to form an umbrella-shaped structure, so that the effective fixation of the anchor is realized; the anchor body 1 is further provided with an internal buckle 14, which realizes the locking of the expansion amplitude with an external buckle 22 arranged on the anchor expansion head 2, so as to prevent the later loosening phenomenon.

Reference usage of suture anchors:

step 1: cutting the tissue to expose the bone, firstly drilling the bone by using a drill bit, wherein the drilling depth is slightly greater than the length of the anchor nail;

step 2: when the anchor is assembled with the handle 4, as shown in fig. 8, the nail holder 42 is matched with a channel through which the suture 3 at the rear end of the anchor body 1 passes for limiting, for example, the cross section of the channel can be square or hexagonal, etc.; screwing the anchor main body 1 into the pre-drilled hole through the handle 4, and increasing screwing force when the anchor expansion head 2 is contacted with bone so as to fully expand the anchor main body 1;

and step 3: the buncher 41 on the handle 4 is opened, the suture is taken off from the handle 3, and the handle 41 and the staple holder 42 are pulled out.

And 4, step 4: the suture 3 is fixed to the tissue by a needle, completing the operation.

The suture anchor perfectly realizes the fixation of tissues and bones, realizes the fusion fixation between soft tissues and bones, meets the requirements of early postoperative movement, muscle exercise and load bearing, and has simple and reliable operation and high clinical value.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A suture anchor, characterized by: the external thread of the anchor body is arranged on the external side wall of the anchor body, the internal side of the anchor body is provided with a front cavity which is in a truncated cone shape, and the large end of the front cavity is opened on the front end surface of the anchor body; the anchor main body corresponding to the front cavity is provided with a plurality of anchor notches, and the front end of the anchor main body is divided into a plurality of elastic pieces by the plurality of anchor notches; an anchor expansion head is arranged in the front cavity and comprises an expansion part, the expansion part is a truncated cone, the front end of the expansion part is a big end, a positioning part is arranged at the front end of the expansion part, and a suture connecting part is arranged at the rear end of the expansion part; the rear end of the expansion part is provided with an external buckle extending towards the outer side of the expansion part, the side wall of the front cavity is provided with a plurality of internal buckles matched with the external buckles, and the internal buckles and the external buckles are matched with each other to ensure that the anchor expansion head can only slide towards the rear end of the anchor body in a one-way manner; the rear end of the anchor nail body is provided with a channel for a suture to pass through.

2. The suture anchor of claim 1, wherein: the expansion portion is a truncated cone.

3. The suture anchor of claim 2, wherein: the positioning part is a cone, and the bottom surface of the positioning part is fixedly connected with the expansion part.

4. The suture anchor of claim 3, wherein: the bottom surface of the positioning part is completely opposite to and overlapped with the bottom surface of the expansion part.

5. The suture anchor of any one of claims 1 to 4, wherein: the front end surface of the anchor nail main body is an inclined surface matched with the side surface of the expansion part.

6. The suture anchor of claim 1, wherein: the suture connecting part is provided with a plurality of threading holes.

7. The suture anchor of claim 1, wherein: the plurality of internal buckles are uniformly distributed on the side wall of the front cavity from front to back.