Intramedullary nail easy to hold

Abstract

The utility model belongs to the technical field of medical instruments, and relates to an intramedullary nail easy to hold, which comprises a screw and a screw cap, the screw and the screw cap are respectively provided with a first external thread and a second external thread, the spiral directions of the first external thread and the second external thread are opposite, the screw and the screw cap are of an integrally formed structure, and the screw cap is provided with a screw hole. The screw cap is of a conical structure, the diameter of the section of the conical structure is gradually reduced in the direction away from the screw, and the screw taking wrench is provided with a conical internal thread matched with the second external thread. The intramedullary nail extractor is simple in structure and convenient to operate, achieves a grasping function when an intramedullary nail is extracted, and has the advantages of being convenient, fast, stable and reliable, reducing work difficulty of doctors, improving nail extraction efficiency, well relieving pain of patients and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to an intramedullary nail that is easy to grip. Background Art

[0002] The mainstream locking nail used for interlocking intramedullary nails is a fully threaded nut screw. When the use area is a region with rich soft tissues around the bone, such as the thigh femur, after fracture healing, when the nail needs to be removed, after the locking nail is screwed out of the bone surface, due to the lack of a holding function, it often falls into the soft tissues, and forceps need to be used to enter the soft tissues to find and clamp to remove the screw. The operation is cumbersome, which not only increases the working difficulty of doctors, but also increases the pain of patients. Content of the Utility Model

[0003] The purpose of the utility model is to solve the defects and deficiencies in the prior art, and to design an intramedullary nail that is easy to grip.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: an intramedullary nail that is easy to grip, including a screw and a nut, wherein the screw and the nut are respectively provided with a first external thread and a second external thread, and the spiral directions of the first external thread and the second external thread are opposite.

[0005] Preferably, the screw and the nut are of an integrally formed structure.

[0006] Preferably, the nut is designed with a conical structure, and the cross-sectional diameter of the conical structure gradually decreases along the direction away from the screw.

[0007] Preferably, it further includes a nail removal wrench, and the nail removal wrench has a conical internal thread that matches the second external thread.

[0008] After adopting the above technical solution, an intramedullary nail that is easy to grip provided by the utility model has the following beneficial effects:

[0009] Through the design of the nut with a conical structure, the utility model can ensure that when the second external thread is provided on the nut, there is no need to increase the diameter and height of the nut, that is, the exposed volume of the nut outside the bone is not increased; through the design that the spiral directions of the first external thread on the screw and the second external thread on the nut are opposite, it can be ensured that after the nail removal wrench is threadedly connected with the nut and self-locked, the screw can be screwed out by continuing to rotate, that is, while exerting the transfer of the screwing force, the screw can be held, ensuring that the screw will not fall off, making the surgical process more simple and fast. Description of the Drawings

[0010] Figure 1 It is a schematic structural diagram of an intramedullary nail that is easy to grip according to the utility model.

[0011] Wherein: screw 1, nut 2, first external thread 3, second external thread 4. Detailed implementation mode

[0012] The present utility model will be further clearly and completely described below in conjunction with the accompanying drawings and the detailed implementation mode. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model.

[0013] It should be noted that the terms used herein are only for describing the detailed implementation mode and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0014] Unless otherwise specifically stated, the relative arrangement, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0015] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the protection scope of the present utility model; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0016] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used here to describe the spatial positional relationship between a device or feature shown in a figure and other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the figure is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0017] In addition, it should be noted that the use of terms such as "first" and "second" to define components is merely for the convenience of differentiating the corresponding components. Without further statement, the above terms have no special meaning, and thus should not be construed as limiting the protection scope of the present utility model.

[0018] A medullary nail that is easy to grasp according to the present utility model, as Figure 1 shown, includes a screw 1 and a nut 2. First external threads 3 and second external threads 4 are respectively provided on the screw 1 and the nut 2, and the spiral directions of the first external threads 3 and the second external threads 4 are arranged in opposite directions.

[0019] Among them, the screw 1 and the nut 2 are of an integrally formed structure. The nut 2 is designed with a conical structure, and the cross-sectional diameter of the conical structure gradually decreases in the direction away from the screw 1.

[0020] Furthermore, it further includes a nail extraction wrench, and the nail extraction wrench has a conical internal thread that mates with the second external thread 4.

[0021] When the medullary nail that is easy to grasp according to the present utility model is in use, the conical internal thread of the nail extraction wrench and the second external thread 4 on the nut 2 are tightened in the direction of their threaded connection. After tightening, the nail extraction wrench and the nut 2 can be self-locked. Since the spiral directions of the first external thread 3 on the screw 1 and the second external thread 4 on the nut 2 are arranged in opposite directions, therefore, by continuing to rotate the nail extraction wrench in the tightening direction, the screw 1 can be screwed out, that is, while exerting the transmission of the screwing force, the screw 1 can be held firmly, ensuring that the screw 1 will not fall off, making the surgical process more simple and rapid.

[0022] In summary, the intramedullary nail provided by the present utility model is easy to grasp, with a simple structure and convenient operation. It realizes the grasping function during the removal of the intramedullary nail, and has the advantages of being convenient and fast, stable and reliable. It not only reduces the working difficulty of doctors and improves the efficiency of nail removal, but also greatly alleviates the pain of patients. It has great market value and is worthy of wide promotion and application.

[0023] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. An intramedullary nail that is easy to grasp, characterized in that: The invention comprises a screw (1) and a nut (2), wherein the screw (1) and the nut (2) are respectively provided with a first external thread (3) and a second external thread (4), and the spiral directions of the first external thread (3) and the second external thread (4) are arranged in opposite directions.

2. The easy-to-grasp intramedullary nail according to claim 1, characterized in that: The screw (1) and the nut (2) are an integrally formed structure.

3. The easy-to-grasp intramedullary nail according to claim 1, characterized in that: The nut (2) is designed as a conical structure, and the cross-sectional diameter of the conical structure gradually decreases in a direction away from the screw (1).

4. The easy-to-grasp intramedullary nail according to claim 3, characterized in that: It also comprises a nail removal wrench, which has a tapered internal thread matching the second external thread (4).

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