CN112603400A

CN112603400A - Self-expansion fixing and extractable medical anchor

Info

Publication number: CN112603400A
Application number: CN202011562601.3A
Authority: CN
Inventors: 戴静静
Original assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Current assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-04-06

Abstract

The invention discloses a self-expansion fixed and extractable medical anchor, which comprises an anchor, wherein the surface of the anchor is provided with first threads, a cavity and a cavity are arranged inside the anchor, second threads are arranged on the inner wall of the cavity, an inclined plane is arranged inside the anchor and between the cavity and the cavity, three grooves are formed in the inclined plane, a bolt is arranged inside the cavity, third threads matched with the second threads are arranged on the surface of the bolt, and fourth threads matched with the third threads are arranged on the inner wall of the cavity. The self-expansion fixing and extractable medical anchor can effectively and firmly fix the tendon or ligament torn from the bone surface on the bone tissue, and the expansion device can increase the withdrawal resistance of the anchor, thereby increasing the stability of repair.

Description

Self-expansion fixing and extractable medical anchor

Technical Field

The invention relates to the technical field of medical treatment, in particular to a self-expansion fixed and extractable medical anchor.

Background

Ligaments, tendons and joint capsules are attached to bone surfaces around joints, the ligaments, the tendons and the joint capsules are often torn from the bone surface attachment part under the action of external force such as injury, so that the joints are loosened and painful, the joints need to be repaired in time, the ligament attachment part is completely torn off from a hard bone surface, so that the repair is difficult, and the medical anchor is widely applied to the injury fixing repair of the tendons, the joint capsules and the bone attachment parts of subjects such as trauma orthopedics, sports medicine and the like, for example, the torn repair of shoulder joints and ankle joints, and the like, so that a good clinical curative effect is achieved.

Present clinical commonly used anchor is mostly thread fixing, need to twist after the reaming, and fix by the frictional force of screw thread, prevent that the anchor from being pulled out, because the diameter of screw thread is limited, frictional force is little, and the in-process is being twisted in addition further enlarged the aperture of implanting in the bone, pull out from the fixed orifices very easily, thereby cause fixed failure, the anchor is implanted the back, if the position is not good enough or sew up the back and relax, current anchor is difficult to be taken out and reuse.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a self-expansion fixing and extractable medical anchor nail, which solves the problem that the diameter of a thread is limited, the friction force is small, the hole diameter implanted into a bone is further enlarged in the screwing process, and the medical anchor nail is very easy to pull out from a fixing hole, so that the fixing fails.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a medical anchor that self-expanding is fixed and can take out, includes the anchor, the surface of anchor is provided with first screw thread, and the inside of anchor is provided with cavity and lumen, the inner wall of cavity is provided with the second screw thread, and just is located and is provided with the inclined plane between lumen and the cavity in the inside of anchor, be provided with three slot on the inclined plane.

Preferably, a bolt is arranged in the cavity, a third thread matched with the second thread is arranged on the surface of the bolt, and three slotted holes are formed in the surface of the anchor and correspond to the tube cavity.

Preferably, the inner wall of the tube cavity is provided with a fourth thread matched with the third thread.

Preferably, one side of the anchor far away from the tube cavity is provided with an opening, and the opening is provided with a lug.

Preferably, one side of the bolt close to the hole is provided with a fixing groove, and the inner wall of the fixing groove is provided with a clamping groove.

Preferably, a corresponding rotating rod is arranged in the fixing groove, and a clamping block matched with the clamping groove is arranged on the rotating rod.

Preferably, the lumen has a diameter of 4mm and the cavity has a diameter of 6 mm.

Preferably, the depth of the clamping groove is 1mm, and the width of the clamping groove is 1 mm.

(III) advantageous effects

The invention provides a self-expanding fixed and extractable medical anchor. The method has the following beneficial effects:

1. the self-expansion fixing and extractable medical anchor is characterized in that the screw rod is screwed into the bolt clockwise, so that the bolt enters the tube cavity from the cavity of the anchor, the outer diameter of the head end of the anchor is enlarged, tendons or ligaments torn off from the surface of a bone can be effectively and firmly fixed on the bone tissue, and the expansion device can increase the anti-pulling force of the anchor, so that the repair stability is improved.

2. The medical anchor capable of being fixed and taken out through self expansion can provide firm and effective bone tendon suture fixation, and meanwhile, the anchor can be taken out and implanted again by utilizing the taking-out device under the condition that the position is not fixed well, so that the waste phenomenon of disposable anchors is prevented.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention with the structural anchor ramp in place;

FIG. 3 is a schematic view of the construction of the bolt of the present invention;

fig. 4 is a schematic structural view of the anchor of the present invention.

In the figure, 1 anchor, 2 first threads, 3 cavities, 4 second threads, 5 tube cavities, 6 inclined planes, 7 grooves, 8 bolts, 9 third threads, 10 fourth threads, 11 convex blocks, 12 fixed slots, 13 clamping slots, 14 rotating rods, 15 clamping blocks and 16 slotted holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, an embodiment of the present invention provides a technical solution: the utility model provides a medical anchor that self-expanding is fixed and can take out, includes anchor 1, and the surface of anchor 1 is provided with first screw thread 2, and the inside of anchor 1 is provided with cavity 3 and lumen 5, and the inner wall of cavity 3 is provided with second screw thread 4, and the inside of anchor 1 just is located and is provided with inclined plane 6 between lumen 5 and the cavity 3, is provided with three slot 7 on the inclined plane 6.

Further, a bolt 8 is arranged inside the cavity 3, a third thread 9 matched with the second thread 4 is arranged on the surface of the bolt 8, and three slotted holes 16 are arranged on the surface of the anchor 1 and corresponding to the tube cavity 5.

Further, the inner wall of the lumen 5 is provided with a fourth thread 10 adapted to the third thread 9.

Further, an opening is formed in one side, away from the lumen 5, of the anchor 1, and a bump 11 is arranged on the opening.

Further, a fixing groove 12 is provided on one side of the bolt 8 near the opening, and a locking groove 13 is provided on an inner wall of the fixing groove 9.

Furthermore, a corresponding rotating rod 14 is arranged in the fixing groove 12, and a clamping block 15 matched with the clamping groove 13 is arranged on the rotating rod 14.

Further, the diameter of the lumen 5 is 4mm, and the diameter of the cavity 3 is 6 mm.

Further, the depth of the card slot 13 is 1mm, and the width of the card slot 13 is 1 mm.

As shown in fig. 1 and 2, the anchor 1 of the present invention is a hollow cylindrical structure, the exterior of the hollow cylindrical structure is provided with a first thread 2 to increase friction, the distal end of the hollow cylindrical structure is closed, the proximal end of the hollow cylindrical structure is open, the cavity 3 is cylindrical, the diameter of the hollow cylindrical structure is 6mm, the inclined plane 6 is provided with three grooves 7, the distance between the grooves is 100 degrees, each groove is 20 degrees, the inner wall of the cavity 3 is provided with a second thread 4, one side of the anchor 1 away from the tube cavity 5 is provided with an opening, the opening is provided with a convex block 11 to prevent the bolt 8 in the anchor 1 from falling off, and the threads;

as shown in fig. 1 and 3, the bolt 8 of the present invention is a cylindrical structure with a solid front part and a hollow rear part, the outer surface of the bolt is provided with a third thread 9, the third thread is matched with a second thread 4 of a cavity 2 in an anchor 1 and a fourth thread 10 of a tube cavity, the diameter of the bolt 8 is 6mm, the front part of the bolt is solid, the rear part of the bolt is hollow, a joint part is provided with a gap for connecting a suture, the bolt 8 is inserted into the middle of the bolt 8 through a fixing groove 12 at the rear part of the bolt 8 by screwing a rotating rod 14, the bolt 8 rotates 20 degrees, the bolt 8 is clamped and fixed with a clamping groove 13 through a clamping block 15, the inner bolt 8 and the anchor 1 can be pulled out from a bone channel, the bolt 8 can enter the tube cavity 5 from the outer structure of the anchor 1 forwards by rotating;

after the drill bit with the same diameter as the anchor 1 is used, the anchor 1 is sent into a bone channel through the implantation device, the screw rod 14 is screwed into the bolt 8 clockwise, the bolt 8 enters the tube cavity 5 from the cavity 3 of the anchor 1, and the slotted hole 16 is deformed, so that the outer diameter of the head end of the anchor 1 is enlarged, and the effects of fixing in the bone and preventing pulling out are achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A self-expanding fixated and retrievable medical anchor comprising an anchor (1), characterised in that: the surface of anchor nail (1) is provided with first screw thread (2), and the inside of anchor nail (1) is provided with cavity (3) and lumen (5), the inner wall of cavity (3) is provided with second screw thread (4), and the inside of anchor nail (1) just is located and is provided with inclined plane (6) between lumen (5) and cavity (3), be provided with three slot (7) on inclined plane (6).

2. A self-expanding fixed and retrievable medical anchor according to claim 1, wherein: the hollow cavity (3) is internally provided with a bolt (8), the surface of the bolt (8) is provided with a third thread (9) matched with the second thread (4), and the surface of the anchor (1) and the pipe cavity (5) are correspondingly provided with three slotted holes (16).

3. A self-expanding fixed and retrievable medical anchor according to claim 2, wherein: and a fourth thread (10) matched with the third thread (9) is arranged on the inner wall of the tube cavity (5).

4. A self-expanding fixed and retrievable medical anchor according to claim 3, wherein: one side of the anchor nail (1) far away from the tube cavity (5) is provided with an opening, and a convex block (11) is arranged on the opening.

5. A self-expanding fixed and retrievable medical anchor according to claim 4, wherein: one side of the bolt (8) close to the hole is provided with a fixing groove (12), and the inner wall of the fixing groove (9) is provided with a clamping groove (13).

6. A self-expanding fixed and retrievable medical anchor according to claim 5, wherein: and corresponding rotating rods (14) are arranged in the fixing grooves (12), and clamping blocks (15) matched with the clamping grooves (13) are arranged on the rotating rods (14).

7. A self-expanding fixed and retrievable medical anchor according to claim 1, wherein: the diameter of the tube cavity (5) is 4mm, and the diameter of the cavity (3) is 6 mm.

8. A self-expanding fixed and retrievable medical anchor according to claim 6, wherein: the depth of the clamping groove (13) is 1mm, and the width of the clamping groove (13) is 1 mm.