CN213787716U

CN213787716U - Annular patella claw

Info

Publication number: CN213787716U
Application number: CN202021569086.7U
Authority: CN
Inventors: 田岱苑; 田杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-02
Filing date: 2020-08-02
Publication date: 2021-07-27
Anticipated expiration: 2030-08-02

Abstract

The utility model relates to the technical field of medical equipment, and discloses an annular patella claw, which comprises an upper part fixing piece, a lower part fixing piece and a lateral part fixing piece, wherein the upper part fixing piece and the lower part fixing piece comprise a body part and a claw part, the lateral part fixing piece comprises a lateral ring part and a single claw part, the lateral ring part is formed by connecting two semi-annular lateral ring parts at the two sides of the body part with the upper pole and the lower pole of the body part, lateral through holes are distributed on the lateral ring part, the single claw part is connected with the lateral ring part through the lateral through holes, the advantages of the patella ring and the patella claw are effectively integrated, all types of fracture of the patella, including transverse fracture, longitudinal fracture and comminuted fracture, not only solving the problem that the traditional patella claw is only suitable for the simple transverse fracture and can not be effectively used for comminuted fracture of the patella, but also solving the problem that the traditional patella ring has insufficient strength and easily causes the internal fixation failure, and effectively pressurizing and fixing the upper and lower poles and the comminuted bone blocks at the two sides of the patella, reliable and satisfactory internal fixation is realized.

Description

Annular patella claw

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to annular patella claw.

Background

The patella is the largest seed bone of the human body and is an important knee stretching device. Patellar fracture accounts for about 1% of general fracture, and is caused by direct violence or indirect violence of quadriceps muscle contraction and traction. Patellar fracture is intra-articular fracture, and most of patellar fractures need surgical treatment except a few non-displacement fractures, require anatomical reduction and strong fixation, are beneficial to early functional exercise of knee joints and prevent stiffness.

The internal fixation technology for patellar fracture mainly comprises the following steps: cerclage fixation, tension band fixation, patellar concentrator fixation, patellar claw fixation, patellar ring fixation, and the like. Currently, tension band fixation, patella claw fixation and patella ring fixation are commonly used. In the tension band fixing operation, the steel needle is easy to withdraw after the knee joint moves frequently, so that the internal fixation fails, and meanwhile, the tail part of the steel needle stimulates patellar ligaments and skin. The patella claw is firmly fixed, but is only suitable for simple transverse fracture and cannot effectively solve the comminuted fracture of the patella. The patella ring is suitable for various types of patella fractures, but has insufficient strength and is easy to cause the internal fixation to lose efficacy.

The comminuted fracture of the patella mostly appears in the lower extreme, at present, a reliable and satisfactory internal fixing device does not exist, the annular patella claw can be suitable for all types of patella fracture application, and the annular patella claw is innovatively designed by combining years of clinical practice work.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an annular patella claw is provided, the polytype fracture of patella can be effectively solved, at least including horizontal fracture, longitudinal fracture and comminuted fracture.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes: the utility model provides an annular patella claw, includes upper portion mounting, lower part mounting and lateral part mounting, and upper and lower part mounting includes somatic part and hook portion, and the lateral part mounting includes side ring portion and monomer hook portion, and side ring portion by two semi-ring side ring portion in somatic part both sides are connected with the last utmost point of somatic part and are formed with utmost point down, have laid the side direction through-hole on the side ring portion, and monomer hook portion passes through the side direction through-hole and is connected with side ring portion.

The side ring part is detachably connected with the body part, and the side ring part can be selectively installed or detached as required.

The body part comprises an upper body part and a lower body part, the claw part of the upper fixing part is arranged at the upper pole of the upper body part, and the claw part of the lower fixing part is arranged at the lower pole of the lower body part.

Go up between somatic part and the lower somatic part through the bolt hole and the hollow groove-shaped structure of mutually supporting with screw fixed connection, through the interlock of dentate structure each other between the contact surface to can adjust the distance between upper and lower mounting hook claw portion as required, adapt to the change of different patella sizes, and be used for the pressurization, make the patella of fracture fixed firm, fixing device is strong reliable.

The body part is rectangular and slightly arc-shaped and is matched with the front face of the patella.

The hook claw part is provided with more than two hook claws which are arranged and distributed in a fan shape.

The hook claw comprises a rod part and a claw hook, and the rod part is bent to form a certain included angle with the body part and is matched with the proximal end of the patella.

The hook claw part of the lower fixing part is a row hook, more than three hook claws are arranged in a fan shape and are used for catching and fixing extremely broken bone blocks under the patella.

The middle of the rod part of the claw of the single claw part is cut open along the length direction of the rod part, and the rod part is divided into two parts which can be opened and used for fixing the single claw on the side ring part.

The utility model discloses an annular patella claw has effectively fused the advantage of patella ring sum patella claw, can effectively solve various types of fractures of patella, including horizontal fracture, vertical fracture and comminuted fracture etc. detachable side ring portion makes it can be as required random independent assortment, has both solved traditional patella claw and has only been applicable to simple horizontal fracture, can not effectively be used for the problem of patella comminuted fracture, has solved traditional patella ring intensity again not enough, makes the problem of internal fixation inefficacy easily.

The annular patella claw is simple in structure, stable and reliable, high in practicability and capable of effectively pressurizing and fixing the upper and lower poles of the patella and the bone fragments on the two sides of the patella, and realizing reliable and satisfactory internal fixation.

Drawings

The invention will be further described with reference to the accompanying drawings:

fig. 1 is a schematic structural view of the annular patella claw of the present invention;

FIG. 2 is a schematic view of a lower portion of the hook portion fixing device of a row hook type;

FIG. 3 is a schematic view of the structure of the upper and lower fixing members;

FIG. 4 is a schematic view of the structure of upper and lower fixtures with hook portions of a row hook type at the lower part;

FIG. 5 is a schematic view of the upper fixture;

FIG. 6 is a schematic view of the construction of the upper fixture with side ring portions;

FIG. 7 is a schematic view of the construction of the lower fixture;

FIG. 8 is a schematic view showing the structure of a row hook type lower fixture;

fig. 9 is a schematic view of a structure of a single finger.

Detailed Description

The technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.

Referring to fig. 1-9, the utility model discloses an annular patella claw, including upper portion mounting, lower part mounting and lateral part mounting, upper and lower part mounting includes somatic part 1 and

claw portion

2 and 3, and the lateral part mounting includes side ring portion 4 and monomer claw portion 5, and side ring portion 4 is formed by two semi-annular side ring portions in the last utmost point and the lower utmost point of somatic part 1 both sides and somatic part 1 are connected, has laid side direction through-hole 4-1 on side ring portion 4, and monomer claw portion 5 is connected with side ring portion 4 through side direction through-hole 4-1.

Wherein the body 1 includes an upper body 1-1 and a lower body 1-2, and referring to fig. 5-8, the finger portion 2 of the upper fixing member is disposed at an upper pole of the upper body 1-1, and the finger portion 3 of the lower fixing member is disposed at a lower pole of the lower body 1-2. The body part 1 is rectangular, is slightly curved to one side and is matched with the front of the patella, the curvatures of the upper body part 1-1 and the lower body part 1-2 are consistent, the upper body part 1-1 and the lower body part 1-2 are fixedly connected through a bolt hole 1-3 and a hollow groove-shaped structure 1-4 which are matched with each other by a screw, the distance between the claw parts of the upper fixing part and the lower fixing part can be adjusted according to the requirement to adapt to the change of different sizes of the patella, in the figure, the bolt hole 1-3 is arranged on the upper body part 1-1, the hollow groove-shaped structure 1-4 is arranged on the lower body part 1-2, the positions of the bolt hole 1-3 and the hollow groove-shaped structure 1-4 can be interchanged, the hollow groove-shaped structure 1-4 is a long hole structure, preferably, a sunk groove-long hole structure as shown in figure 8 is adopted, when the screw passes through the hollow groove-shaped structure 1-4 and is in threaded connection with the threaded hole 1-3, the nut of the screw sinks into the hollow groove-shaped structure 1-4, so that the screw is prevented from protruding. The contact surfaces between the upper body part 1-1 and the lower body part 1-2 are mutually occluded through the dentate structures 1-5, so that the upper body part 1-1 and the lower body part 1-2 are connected more firmly, the pressurization is convenient, the patella of the fracture is fixed firmly, and the fixing device is strong and reliable. "

The

hook claw parts

2 and 3 are formed by more than two hook claws which are distributed in an arrangement shape in a sector shape, each hook claw comprises a rod part and a claw hook, and the rod part is bent to form a certain included angle with the body part 1 and is matched with the proximal end of the patella. The hook claws of the hook claw parts of the upper fixing part and the lower fixing part are integrally connected with the body part of the upper fixing part, and referring to the figure, the hook claw parts of the upper fixing part in figures 1, 2 and 6 are integrally connected with the upper body part 1-1 by 3 hook claws, and the hook claw parts of the upper fixing part in figures 3, 4 and 5 are integrally connected with the upper body part 1-1 by 2 hook claws and are used for hooking the suprapatellar pole; the hook portion of the lower fixing member in fig. 1, 3 and 7 is integrally connected with the lower body portion 1-2 by 2 hooks, and the hook portion of the lower fixing member in fig. 2, 4 and 8 is integrally connected with the lower body portion 1-2 by 5 hooks for hooking the patella inferior pole. Since the inferior patella comminuted fracture is often the case, the lower fixing member may have a plurality of hooks arranged in a fan-shaped configuration, or may have 4 or 6 hooks, depending on the fracture condition, and is suitable for the inferior patella comminuted fracture.

The side ring part 4 is detachably connected with the body part 1 through a buckle or a pin 1-6, the side ring part can be selectively installed or detached as required, if the fracture is simple in transverse movement, the side ring part 4 can be detached, only upper and lower fixing pieces are used, if the fracture is comminuted, the side ring part 4 is installed on two sides of the body part 1, and the fracture setting device can be suitable for comminuted fracture. The number of the lateral through holes 4-1 on the side ring part 4 is several, each hook claw of the single hook claw part 5 is connected with the side ring part 4 through the lateral through holes 4-1 distributed on the side ring part 4, and the using number of the hook claws of the single hook claw part 5 is determined according to the fracture situation. Referring to fig. 9, in each single claw of the claw portion, the middle of the rod portion 5-1 is cut open along the length direction through a partial opening line 5-4, the rod portion 5-1 is divided into two parts, the tail end of the rod portion 5-1 is of a dovetail fork opening structure, so that two sides of the rod portion can be conveniently opened, the single claw is fixed on the side ring portion 4, when the single claw is used, the single claw is inserted into the lateral through hole 4-1 of the side ring portion 4, then two sides of the tail end of the rod portion 5-1 are opened, and the claw can be fixed simply and conveniently.

Referring to fig. 9, the claw hook 5-2 of the single claw is a single hook or a double hook for fixing the broken bone block on the side of the patella.

While embodiments of the present invention have been illustrated and described, it will be appreciated by those of ordinary skill in the art that: without departing from the principles and spirit of the present invention, it can be said that there are various changes, modifications, substitutions and alterations herein, and the scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An annular patellar claw, comprising: including upper portion mounting, lower part mounting and lateral part mounting, upper and lower part mounting includes somatic part and claw portion, and the lateral part mounting includes side ring portion and monomer claw portion, side ring portion by two semi-ring shape side ring portion in somatic part both sides are connected with the last utmost point and the lower extreme of somatic part and are formed, have laid the side direction through-hole on the side ring portion, and monomer claw portion is connected with side ring portion through the side direction through-hole.

2. The annular patellar claw according to claim 1, wherein: the side ring part is detachably connected with the body part through a buckle or a pin.

3. The annular patellar claw according to claim 1, wherein: the body part comprises an upper body part and a lower body part, the claw part of the upper fixing part is arranged at the upper pole of the upper body part, and the claw part of the lower fixing part is arranged at the lower pole of the lower body part.

4. The annular patellar claw according to claim 3, wherein: the upper body part and the lower body part are fixedly connected through screws through bolt holes and hollow groove-shaped structures which are matched with each other, and the contact surfaces are meshed with each other through a tooth-shaped structure.

5. The annular patellar claw according to claim 1, wherein: the body part is rectangular and is arc-shaped and is matched with the front face of the patella.

6. The annular patellar claw according to claim 1, wherein: the hook claw part is provided with more than two hook claws which are arranged and distributed in a fan shape.

7. The annular patellar claw according to claim 6, wherein: the hook claw comprises a rod part and a claw hook, and the rod part is bent to form a certain included angle with the body part and is matched with the proximal end of the patella.

8. The annular patellar claw according to claim 6, wherein: the hook claw part of the lower fixing part is a row hook, and more than three hook claws are arranged in a fan shape.

9. The annular patellar claw according to claim 7, wherein: the claw hook is a single hook or a double hook.

10. The annular patellar claw according to claim 7, wherein: the middle of the rod part of the claw of the single claw part is cut open along the length direction of the rod part, and the rod part is divided into two parts.