A hollow nail threading device for treating patellar fracture
By designing a hollow nail threading device for patella fracture treatment, using threads to separate the anterior and posterior sections, and setting limit blocks and limit slots inside it, the problem of soft tissue affecting the steel wire when penetrated into the hollow nails in the prior art is solved, and the smoothness and safety of the operation are improved.
Patent Information
- Application Number
- CN202421274938.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-05
AI Technical Summary
In the prior art, when steel wire is penetrated directly into hollow nails, it is easy to be affected by soft tissue, which brings unnecessary trouble to the surgery.
A hollow nail thread passer is designed. By setting threads on the front and rear sections, the originally integrated thread passer is divided into two, and a front section hole is provided in the front section, and a steel wire is penetrated from the front section hole and enter the hollow nail to avoid contact with soft tissue. In addition, by setting a limit block on the front section and setting a limit slot on the hollow nail, the hollow nail will not fall off the upper during rotation of the line passer.
The hollow nail thread passer reduces contact with soft tissue by separating the anterior and posterior sections, improves the smoothness of the operation, and avoids the problem of hollow nail falling off through the design of the limiting block and the limiting slot, reducing the complexity of the operation.
Smart Images
Figure CN222708366U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hollow nail wire passers, in particular to a hollow nail wire passer for treating patellar fractures. Background Art
[0002] The patella, commonly known as the kneecap, is a sesamoid bone formed in the quadriceps tendon. The bone is wide at the top and pointed downward, with a rough front and smooth back. It can move up and down, left and right, and protects the knee joint. The back of the patella is smooth and covered with cartilage, connecting to the patellar surface of the femur. The front is rough, and the quadriceps tendon passes through it. Patellar fracture is a common injury, with local swelling and pain of the patella, inability to straighten the knee joint independently, often with subcutaneous ecchymosis and skin abrasions on the knee.
[0003] Since patellar fractures are intra-articular fractures, fracture reduction is required to be performed more accurately. Therefore, displaced patellar fractures generally require surgical treatment. The surgical method is called open reduction and internal fixation. After cutting the skin and fascia and other soft tissues, the patellar fracture fragments are exposed. After the patellar fracture is reduced, the fracture ends are fixed with a hollow nail. A wire guide is required during the operation. However, in the existing technology, when the steel wire is directly inserted into the hollow nail, it is easily affected by the soft tissue, which brings unnecessary trouble to the operation. Therefore, the wire guide needs to be improved. Utility Model Content
[0004] The utility model aims to provide a hollow nail wire-passing device for treating patellar fractures, which solves the problem in the prior art that when directly inserting a steel wire into a hollow nail, the steel wire is easily affected by soft tissue, thus causing unnecessary troubles to the operation.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hollow nail wire passer for treating patellar fracture, comprising a posterior segment, a posterior segment hole is arranged inside the posterior segment, and an internal thread is arranged at the front end of the posterior segment; the posterior segment is threadedly connected to the front segment, an external thread is arranged at the tail end of the front segment, the front end of the front segment is fixedly connected to a limiting block, and a front segment hole is arranged inside the front segment.
[0006] As a further description of the above technical solution: the rear section hole runs through the entire rear section, the front section hole runs through the entire front section and the limit block, the front end of the front section is movably connected with a hollow nail, the tail end of the hollow nail is provided with a limit groove, the interior of the hollow nail is provided with a hollow nail hole, and the hollow nail hole runs through the entire hollow nail and the limit groove.
[0007] As a further description of the above technical solution: the tail end of the rear section is fixedly connected to a handle, and the rear section penetrates downwardly through the interior of the entire handle.
[0008] The utility model has the following beneficial effects:
[0009] 1. Compared with the prior art, the hollow nail wire passer for treating patellar fracture can be divided into two parts by setting threads on the anterior section and the posterior section, and an anterior section hole is set in the anterior section. The steel wire is inserted into the hollow nail through the anterior section hole, which can avoid contact with soft tissue and make the operation go more smoothly.
[0010] 2. Compared with the prior art, the hollow nail wire-passing device for treating patellar fractures has a limit block on the front segment and a limit groove on the hollow nail, thereby ensuring that the hollow nail will not fall off during the rotation of the wire-passing device, thereby avoiding unnecessary troubles during the operation.
[0011] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention is further described below with reference to the accompanying drawings and embodiments;
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0014] Figure 2 It is a three-dimensional schematic diagram of the rear section structure of the utility model.
[0015] Figure 3 It is a bottom view of the handle of the utility model.
[0016] Figure 4 It is a three-dimensional schematic diagram of the front section structure of the utility model.
[0017] Figure 5 It is a three-dimensional schematic diagram of the hollow nail structure of the utility model.
[0018] Legend:
[0019] 1. Handle; 2. Rear section; 3. Front section; 4. Limit block; 5. Hollow nail; 6. Front section hole; 7. External thread; 8. Internal thread; 9. Rear section hole; 10. Limit groove; 11. Hollow nail hole. DETAILED DESCRIPTION
[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.
[0021] Reference Figure 1-5The utility model provides an embodiment of a hollow nail threader for treating patellar fracture, comprising a posterior segment 2, a posterior segment hole 9 is provided inside the posterior segment 2, the posterior segment hole 9 is used to insert a guide pin for guiding the direction, and an internal thread 8 is provided at the front end of the posterior segment 2;
[0022] The rear section 2 is threadedly connected to the front section 3, and the tail end of the front section 3 is provided with an external thread 7. The connection between the front section 3 and the rear section 2 is achieved through the external thread 7 of the front section 3 and the internal thread 8 of the rear section 2. Moreover, the threaded connection method can facilitate the separation of the front section 3 and the rear section 2 in subsequent operations. The front end of the front section 3 is fixedly connected to the limiting block 4, and the interior of the front section 3 is provided with a front section hole 6.
[0023] The posterior segment hole 9 runs through the entire posterior segment 2, and the anterior segment hole 6 runs through the entire anterior segment 3 and the limit block 4. The anterior segment hole 6 is used to insert a guide pin for guiding the direction and a steel wire for fixing the patella.
[0024] The tail end of the rear section 2 is fixedly connected with the handle 1 , and the rear section 2 runs downward through the entire interior of the handle 1 . The front section 3 and the rear section 2 can be connected or separated by rotating the handle 1 .
[0025] The front end of the anterior segment 3 is movably connected with a hollow nail 5, which can reduce the intraosseous pressure of the patella, promote blood circulation and prevent femoral head necrosis. After the anterior segment 3 and the posterior segment 2 are connected and the anterior segment 3 and the hollow nail 5 are connected, the handle 1 can be turned to place the hollow nail 5 inside the patella.
[0026] A limiting groove 10 is provided at the tail end of the hollow nail 5, and a hollow nail hole 11 is provided inside the hollow nail 5. The hollow nail hole 11 runs through the entire hollow nail 5 and the limiting groove 10. The limiting groove 10 is combined with the limiting block 4 to prevent the hollow nail 5 from falling off from the anterior segment 3 when the handle 1 is turned, thereby ensuring the smooth progress of the operation. The hollow nail hole 11 is also used to insert a guide pin for guiding the direction and a steel wire for fixing the patella.
[0027] Working principle: When the device is in use, first turn the handle 1 to connect the front section 3 and the posterior section 2 through the external thread 7 of the front section 3 and the internal thread 8 of the posterior section 2, then put the limit block 4 fixed on the front section 3 into the limit block 10 on the hollow nail 5 to connect the front section 3 and the hollow nail 5, then insert the front end of the guide needle into the patella, and pass the tail end of the guide needle through the hollow nail hole 11, the front section hole 6, and the posterior section hole 9 in turn and pass through the handle 1 to the outside, turn the handle 1 to place the hollow nail 5 in the patella along the direction of the guide needle, remove the guide needle from the outside of the handle 1, and then turn the handle 1 to separate the posterior section 2 from the front section 3, leaving the front section 3 and the hollow nail 5, then pass the steel wire through the front section hole 6 and the hollow nail hole 11 in turn into the patella, finally remove the front section 3, and perform the next operation on the steel wire in the hollow nail 5.
[0028] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.
Claims
1. A hollow nail threader for treating patellar fractures, comprising a posterior segment (2), characterized in that: A rear section hole (9) is provided inside the rear section (2), and an internal thread (8) is provided at the front end of the rear section (2); The rear section (2) is threadedly connected to the front section (3), the rear end of the front section (3) is provided with an external thread (7), the front end of the front section (3) is fixedly connected to a limiting block (4), the interior of the front section (3) is provided with a front section hole (6), the front end of the front section (3) is movably connected to a hollow nail (5), the rear end of the hollow nail (5) is provided with a limiting groove (10), the interior of the hollow nail (5) is provided with a hollow nail hole (11), and the hollow nail hole (11) runs through the entire hollow nail (5) and the limiting groove (10).
2. A hollow nail threader for treating patellar fracture according to claim 1, characterized in that: The rear section hole (9) passes through the entire rear section (2), and the front section hole (6) passes through the entire front section (3) and the limiting block (4).
3. The hollow nail threader for treating patellar fracture according to claim 1, characterized in that: The tail end of the rear section (2) is fixedly connected to the handle (1), and the rear section (2) penetrates downwardly through the interior of the entire handle (1).