Clavicular intramedullary pin

Abstract

The utility model discloses a kind of clavicle intramedullary needles, including intramedullary needle body and locking screw, wherein: intramedullary needle body includes front, middle and rear, middle is used to connect rear and front;Rear end is provided with a inclined hole, the inclined hole is used to insert locking screw, the tail of the locking screw is equipped with a end head, and the area of the end head is greater than the area of the tail of intramedullary needle body rear.

Description

Technical Field

[0001] This utility model relates to medical devices, and more particularly to an intramedullary needle for locking bone marrow. Background Technology

[0002] Clavicle fracture is a common fracture, and in clinical practice, intramedullary nailing of the clavicle is often used for surgical treatment. The end of the intramedullary nail of the clavicle has a screw hole for passing through the fastening screw. When the existing fastening screw is screwed into the screw hole, it is easy for the entire intramedullary nail of the clavicle to be inserted into the clavicle opening, which makes it difficult for doctors to remove the fastening screw after the patient's fracture has healed. Utility Model Content

[0003] Therefore, this utility model proposes a bone marrow locking needle that can solve the above problems.

[0004] To achieve the purpose of this utility model, the following technical solution is adopted:

[0005] An intramedullary nail with locking mechanism includes an intramedullary nail body and a locking screw, wherein: the intramedullary nail body includes a front part, a middle part and a rear part, the middle part is used to connect the rear part and the front part; the rear part has an oblique hole at its tail end for inserting the locking screw, and the locking screw has a tip at its tail end, the area of ​​which is larger than the area of ​​the tail end of the rear part of the intramedullary nail body.

[0006] The intramedullary nail that locks in the bone marrow, wherein: the tip completely covers the tail end of the posterior part of the intramedullary nail body.

[0007] The intramedullary nail described herein has the smallest or thinnest diameter at the tip of the anterior part of the nail body.

[0008] The intramedullary nail of the aforementioned lock is wherein the diameter of the posterior part is greater than the diameter of the anterior part, or is thicker than the anterior part.

[0009] The intramedullary nail for locking the bone marrow, wherein: the inner wall of the oblique hole is provided with internal threads, the oblique hole is a through hole, and the end opening is located on the outer wall of the rear part of the intramedullary nail body.

[0010] The intramedullary nail described herein has a slotted end with a single line or a cross. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the intramedullary nail structure. Detailed Implementation

[0012] The following is in conjunction with the appendix Figure 1This document provides a detailed description of the specific embodiments of this utility model. These embodiments are exemplary and intended only to explain the present utility model, and should not be construed as limiting the scope of the present utility model. Clearly, the embodiments described in this utility model are merely a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0013] The terms "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of the present invention include the specific features, structures, or characteristics described in connection with that embodiment. Therefore, the terms "comprising," "including," "having," and variations thereof in this specification mean "including but not limited to," unless otherwise specifically emphasized.

[0014] like Figure 1 As shown, the intramedullary nail includes an intramedullary nail body 1, which is generally presented as multiple curved continuous or discontinuous extensions.

[0015] The intramedullary nail body 1 includes an anterior part 2, a middle part 9 and a posterior part 3. The middle part is used to connect the posterior part 3 and the anterior part 2. The tip 20 of the anterior part 2 has the smallest or finest diameter.

[0016] The diameter of the rear part 3 is larger than that of the front part 2, or thicker than the front part 2. The tail end 4 of the rear part 30 has an oblique hole 7. The inner wall of the oblique hole 7 is provided with internal threads. The oblique hole 7 is a through hole, and the end opening is located on the outer wall of the rear part 3 of the intramedullary needle body 1.

[0017] The intramedullary nail also includes a locking screw 5. The intramedullary nail body 1 is inserted into the clavicle. The locking screw 5 is screwed in along the oblique hole 7. Its head tip 8 extends out from the end opening of the oblique hole 7 and passes through the clavicle to restrict the position of the intramedullary nail body 1.

[0018] The locking screw 5 has a tip 7 at its tail, the area of ​​which is larger than the area of ​​the tail end of the intramedullary nail body 1 rear portion 30. Preferably, the tip 7 completely covers the tail end of the intramedullary nail body 1 rear portion 30. Preferably, the tip 7 has a slotted or cross-shaped groove (not shown in the figure) to facilitate tightening with manual or power tools.

[0019] Therefore, when the intramedullary nail body 1 is locked by the locking screw 5 during surgery, its tail end can be fastened to the clavicle after the locking screw 5 is tightened, so that the intramedullary nail body 1 is always kept in the predetermined position, neither rotating nor completely submerged into the clavicle opening, which facilitates the subsequent removal of the intramedullary nail body.

[0020] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A locking intramedullary nail, comprising an intramedullary nail body and a locking screw, characterized in that: The intramedullary nail body includes a front part, a middle part, and a rear part. The middle part is used to connect the rear part and the front part. The rear part has an oblique hole at its tail end for inserting a locking screw. The locking screw has a tip at its tail end, and the area of ​​the tip is larger than the area of ​​the tail end of the rear part of the intramedullary nail body.

2. The intramedullary nail according to claim 1, characterized in that: The tip completely covers the tail end of the intramedullary nail body.

3. The intramedullary nail according to claim 1, characterized in that: The tip of the anterior part of the intramedullary nail body has the smallest or thinnest diameter.

4. The intramedullary nail according to claim 1, characterized in that: The diameter of the rear part is larger than that of the front part, or it is thicker than the front part.

5. The intramedullary nail according to claim 1, characterized in that: The inner wall of the oblique hole is provided with internal threads. The oblique hole is a through hole, and the end opening is located on the outer wall of the rear part of the intramedullary needle body.

6. The intramedullary nail according to claim 1, characterized in that: The end has a slotted or cross-shaped cut.

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