Intramedullary nail with wide application range

Abstract

The utility model discloses a general intramedullary nail which comprises an inner nail near-end portion and an inner nail rod, the lower end of the inner nail near-end portion is of a tubular structure, the upper portion of the inner nail rod is arranged in the inner nail near-end portion in a sleeved mode, plane portions are arranged on the two sides of the inner nail near-end portion, two threaded holes are formed in the plane portions, locking screws are arranged in the threaded holes, and the locking screws are connected with the inner nail near-end portion. The upper portion of the inner nail rod is provided with a connecting portion arranged at the near end of the inner nail in a sleeving mode, kidney-shaped grooves are formed in the two sides of the connecting portion, and when the near end of the inner nail and the inner nail rod are locked through the locking screw, the tail end of the locking screw abuts against the kidney-shaped grooves. According to the scheme, the inner nail near-end portion and the inner nail rod are designed to be of a split structure and connected through the locking screw, the locking screw is loosened when the length needs to be adjusted, the length of the whole intramedullary nail can be adjusted by pulling the inner nail near-end portion and the inner nail rod in the opposite directions, and then the inner nail near-end portion and the inner nail rod are locked through the locking screw. The purpose of adjusting the length of the intramedullary nail is achieved, and the treatment cost is saved for patients.

Description

Technical Field

[0001] The utility model relates to the technical field of intramedullary nails, in particular to an intramedullary nail with wide general applicability. Background Art

[0002] Intramedullary nails are orthopedic internal fixation devices among medical devices, and are mainly used to treat long bone fractures, bone nonunion and the like. Its structure mainly includes an intramedullary nail rod, which is usually in the shape of a long strip. At the proximal end of the intramedullary nail rod, a proximal locking screw hole is provided. Current tibial intramedullary nail surgery requires matching intramedullary nails of different lengths. Different patients have different bone lengths and require intramedullary nails of different lengths. Although existing intramedullary nails have a variety of length specifications, there is still a situation where there is no intramedullary nail of the appropriate length to match the patient's bone length. At this time, it is necessary to follow up on the patient's bone length to customize a suitable intramedullary nail for use. This results in the patient being unable to receive effective treatment in a timely manner, and thus missing the best treatment. In fact, customized intramedullary nails will also increase the economic burden on patients. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] The technical problem to be solved by the utility model is that the existing intramedullary nails have various length specifications, but there is still a situation where there is no intramedullary nail of suitable length to match the patient's bone length. At this time, it is necessary to follow up the patient's bone length to customize a suitable intramedullary nail for use. As a result, the patient cannot get effective treatment in time, and then misses the best treatment. At the same time, the customized intramedullary nail will also increase the economic burden of the patient.

[0005] (II) Technical solution

[0006] In order to solve the above problems, the utility model provides the following technical solutions:

[0007] A widely used intramedullary nail comprises an inner nail proximal portion and an inner nail rod, the lower end of the inner nail proximal portion is a tubular structure, the upper portion of the inner nail rod is sleeved in the inner nail proximal portion, flat portions are provided on both sides of the inner nail proximal portion, two threaded holes are provided on the flat portions, and locking screws for locking the inner nail proximal portion and the inner nail rod are provided in the threaded holes, a connecting portion sleeved on the inner nail proximal portion is provided on the upper portion of the inner nail rod, waist-shaped grooves are provided on both sides of the connecting portion, and when the locking screw locks the inner nail proximal portion and the inner nail rod, the end of the locking screw is pressed against the waist-shaped groove.

[0008] Furthermore, two first locking screw holes are provided on the proximal end of the inner nail.

[0009] Furthermore, the inner nail rod is provided with two second locking screw holes.

[0010] Furthermore, a clamping portion is provided on the proximal end portion of the inner nail, a group of clamping bosses are symmetrically provided on the clamping portion, and a clamping cavity matching with the clamping portion is provided on the inner nail rod.

[0011] Furthermore, a group of connecting grooves and an arc-shaped cover are provided on the planar portion, and a connecting boss which is interference-fitted with the connecting groove is provided on the arc-shaped cover, and the connecting boss and the arc-shaped cover are an integrally formed structure.

[0012] Furthermore, the proximal end of the inner nail is provided with a first tapered portion, and the inner nail rod is provided with a second tapered portion.

[0013] (III) Beneficial effects

[0014] The beneficial effect of the utility model is that in the present solution, the proximal end of the inner nail and the inner nail rod are designed as a separate structure, and the two are connected by a locking screw. When the length needs to be adjusted, the locking screw is loosened, and the length of the entire intramedullary nail can be adjusted by pulling the proximal end of the inner nail and the inner nail rod in opposite directions. After the length is adjusted to a suitable length, the two can be locked by the locking screw, thereby achieving the purpose of adjustable length of the intramedullary nail and saving treatment costs for patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the inner nail rod of the utility model;

[0017] Figure 3 It is an exploded view of the proximal end of the inner nail of the utility model;

[0018] Figure 4 It is a cross-sectional view of the proximal end portion of the inner nail of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the clamping part of the utility model;

[0020] In the figure: 1-proximal end of inner nail, 2-inner nail rod, 3-flat portion, 4-threaded hole, 5-locking screw, 6-connecting portion, 7-waist-shaped groove, 8-first locking screw hole, 9-second locking screw hole, 10-clamping portion, 11-clamping boss, 12-clamping cavity, 13-connecting groove, 14-arc cover, 15-connecting boss, 16-first conical portion, 17-second conical portion. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5 A widely used intramedullary nail comprises an inner nail proximal portion 1 and an inner nail rod 2. The inner nail proximal portion 1 and the inner nail rod 2 are different from the traditional integrated intramedullary nail structure, but adopt a split structure, and the inner nail rod 2 and the inner nail proximal portion 1 can move relatively. The lower end of the inner nail proximal portion 1 is a tubular structure, and the upper part of the inner nail rod 2 is sleeved in the inner nail proximal portion 1. The inner nail proximal portion 1 is provided with a flat surface 3 on both sides, and two threaded holes 4 are provided on the flat surface 3. The threaded holes 4 are provided with a locking screw 5 for locking the inner nail proximal portion 1 and the inner nail rod 2. The upper part of the inner nail rod 2 is provided with a connecting portion 6 sleeved on the inner nail proximal portion 1, and waist-shaped grooves 7 are provided on both sides of the connecting portion 6. When the locking screw 5 locks the inner nail proximal portion 1 and the inner nail rod 2, the end of the locking screw 5 is pressed against the waist-shaped groove 7. When it is necessary to connect the proximal end portion 1 of the inner nail with the inner nail rod 2, it is only necessary to lock the locking screw 5, and the locking screws 5 on the two plane portions 3 lock the two to achieve the purpose of fixing the adjusted length. The proximal end portion 1 of the inner nail is also provided with two first locking screw holes 8 for fixing the intramedullary nail with the human skeleton. The inner nail rod 2 is also provided with two second locking screw holes 9 for fixing the intramedullary nail with the human skeleton. The proximal end portion 1 of the inner nail is provided with a clamping portion 10, and the clamping portion 10 is symmetrically provided with a group of clamping bosses 11, and the inner nail rod 2 is provided with a clamping cavity 12 that matches the clamping portion 10. The matching of the clamping portion 10 and the clamping cavity 12 places the two to produce relative rotation in the circumferential direction. A group of connecting grooves 13 and arc-shaped covers 14 are provided on the plane portion 3, and a connecting boss 15 is provided on the arc-shaped cover 14, which is interference-fitted with the connecting grooves 13. The connecting boss 15 and the arc-shaped cover 14 are an integrally formed structure. After the arc-shaped cover 14 is connected to the plane portion 3, the locking screw 5 is prevented from contacting human tissue, thereby improving the overall safety of the intramedullary nail. A first conical portion 16 is provided at the proximal end portion 1 of the inner nail, and a second conical portion 17 is provided on the inner nail rod 2. The arrangement of the first conical portion 16 and the second conical portion 17 can facilitate the intramedullary nail to enter the human bone.

[0023] Working principle: When the length of the intramedullary nail needs to be adjusted, the staff first loosens the locking screw 5 and then holds the proximal end 1 and the inner nail rod 2 with both hands to adjust the length by pulling. After the length adjustment is completed, the locking screw 5 is locked to fix the length, and then the arc cover 14 is snapped onto the flat part 3 to isolate the locking screw 5 from the human bone tissue. Then, the intramedullary nail with a suitable length is implanted into the human bone.

[0024] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it should be understood that although this specification is described in accordance with the implementation mode, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A widely applicable intramedullary nail, characterized by: The invention comprises an inner nail proximal portion (1) and an inner nail rod (2), wherein the lower end of the inner nail proximal portion (1) is a tubular structure, the upper portion of the inner nail rod (2) is sleeved in the inner nail proximal portion (1), the inner nail proximal portion (1) is provided with a plane portion (3) on both sides, the plane portion (3) is provided with two threaded holes (4), and the threaded holes (4) are provided with a locking screw (5) for locking the inner nail proximal portion (1) and the inner nail rod (2), the upper portion of the inner nail rod (2) is provided with a connecting portion (6) sleeved on the inner nail proximal portion (1), and waist-shaped grooves (7) are provided on both sides of the connecting portion (6), and when the locking screw (5) locks the inner nail proximal portion (1) and the inner nail rod (2), the end of the locking screw (5) is pressed against the waist-shaped groove (7).

2. The intramedullary nail with wide applicability according to claim 1, characterized in that: Two first locking screw holes (8) are also provided on the inner nail proximal portion (1).

3. The intramedullary nail with wide applicability according to claim 1, characterized in that: The inner nail rod (2) is also provided with two second locking screw holes (9).

4. The intramedullary nail with wide applicability according to claim 1, characterized in that: The inner nail proximal portion (1) is provided with a clamping portion (10), the clamping portion (10) is symmetrically provided with a group of clamping bosses (11), and the inner nail rod (2) is provided with a clamping cavity (12) matched with the clamping portion (10).

5. The intramedullary nail with wide applicability according to claim 1, characterized in that: The plane portion (3) is provided with a group of connecting grooves (13) and an arc-shaped cover (14); the arc-shaped cover (14) is provided with a connecting boss (15) which is interference-fitted with the connecting groove (13); the connecting boss (15) and the arc-shaped cover (14) are an integrally formed structure.

6. The intramedullary nail with wide applicability according to claim 1, characterized in that: The inner nail proximal portion (1) is provided with a first tapered portion (16), and the inner nail rod (2) is provided with a second tapered portion (17).

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