Anti-rotation guide pin translator for femoral neck dynamic cross-pin system

Abstract

The utility model relates to a anti-rotation guide needle translator of femoral neck dynamic cross nail system, include: handle, handle head, anti-rotation guide needle sleeve, central guide needle sleeve and ring hole, the handle and handle head integrated molding, handle and handle head 30 degree bevel angle, central guide needle sleeve fixed mounting on the oval handle head, and the handle head surface has the oval ring hole, and the anti-rotation guide needle sleeve is connected together through the ring hole with handle head, and through up and down movement can always save the anti-rotation guide needle in the front upper side of central guide needle, and the operation specification is met.

Description

Technical Field

[0001] This utility model relates to an anti-rotation guide pin translation device for a femoral neck dynamic cross nail system, belonging to the field of medical device technology. Background Technology

[0002] The Femoral Neck Dynamic Cross Screw System (FNS) is a novel internal fixation system for the femoral neck, consisting of a dynamic rod, an anti-rotation screw, and a bone plate. The placement of the central guide pin is crucial to the success of the FNS technique. After the central guide pin is accurately placed, an additional anti-rotation guide pin is often required. The anti-rotation guide pin is usually located anterior and superior to the central guide pin to facilitate subsequent surgical operations. Since subsequent hole reaming is required, the distance between the central guide pin and the anti-rotation guide pin must be greater than the radius of the reamer (approximately 16 mm). Otherwise, the anti-rotation guide pin will interfere with the reamer's work during subsequent hole reaming.

[0003] Currently, a utility model patent with publication number CN215306612U discloses an anti-rotation Kirschner wire guide for a femoral neck dynamic cross nail system. The guide consists of a handle, an FNS guide sleeve, and an anti-rotation Kirschner wire sleeve. However, the FNS guide sleeve and the anti-rotation Kirschner wire sleeve in this patent are parallel. During surgery, when the FNS frame is subsequently installed, the anti-rotation guide wire will block the installation of the FNS frame, affecting subsequent surgical operations. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an anti-rotation guide pin translator for the femoral neck dynamic cross nail system. By moving it up and down, the anti-rotation guide pin can always be kept above and in front of the central guide pin, which conforms to the surgical operation specifications.

[0005] To achieve the above objectives, this utility model provides an anti-rotation guide pin translation device for a femoral neck dynamic cross nail system, comprising: a handle, a head, an anti-rotation guide pin sleeve, a central guide pin sleeve, and an annular hole. The handle and the head are integrally formed, with the handle and the head forming a 30-degree angle. The central guide pin sleeve is fixedly mounted on the elliptical head, and an elliptical annular hole is formed on the surface of the head. The anti-rotation guide pin sleeve is connected to the head through the annular hole.

[0006] In addition, the antirotation guide pin translator of the femoral neck dynamic cross nail system proposed in the above embodiments of this utility model may also have the following additional technical features: As a further improvement of this utility model, an anti-rotation guide needle is installed inside the anti-rotation guide needle sleeve, and a central guide needle is installed inside the central guide needle sleeve.

[0007] As a further improvement of this utility model, a medullary reamer is installed on the anti-rotation guide needle.

[0008] As a further improvement of this utility model, the small pressure bag and the thigh pressure bag have openings on their sides, and the opening and closing are controlled by a zipper.

[0009] As a further improvement of this utility model, the length of the anti-rotation guide needle sleeve and the length of the central guide needle sleeve are equal.

[0010] As a further improvement of this utility model, the central guide needle sleeve is located above the annular hole.

[0011] The cross-pin configuration of this invention significantly enhances anti-rotation and anti-shear capabilities, greatly reducing the risk of postoperative fracture displacement and internal fixation failure. It has good stability, allowing patients to begin protective partial weight-bearing activities earlier under the guidance of a doctor, which is beneficial for functional recovery. Moreover, the surgical trauma is relatively small, and the enhanced stability reduces the risk of micromovement at the fracture ends and vascular re-injury. It also avoids stress concentration caused by excessive rigid fixation. This invention can always keep the anti-rotation guide pin in front of and above the central guide pin by moving it up and down, and the difference between left and right positions can be completely ignored during the operation. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-view drawing of the present invention (A is the front view; B is the top view; C is the right view). Figure 3 This is a diagram showing the usage state of this utility model; In the diagram: 1. Handle, 2. Handle head, 3. Anti-rotation guide needle sleeve, 4. Central guide needle sleeve, 5. Ring hole, 6. Reamer, 7. Anti-rotation guide needle, 8. Central guide needle. Detailed Implementation

[0013] The anti-rotation guide pin translator of the femoral neck dynamic cross nail system of this utility model is described below with reference to the accompanying drawings.

[0014] like Figures 1 to 3 As shown, the antirotation guide pin translation device of this femoral neck dynamic cross nail system consists of a handle 1, a head 2, an antirotation guide pin sleeve 3, and a central guide pin sleeve 4. The entire antirotation guide pin translation device is made of metal. The antirotation guide pin sleeve 3 is tightened or loosened by a bolt at its top in conjunction with a washer. This allows the antirotation guide pin sleeve 3 to move within the annular hole 5. The area of ​​the washer in conjunction with the antirotation guide pin sleeve 3 is larger than the area of ​​the annular hole 5, ensuring the bolt is properly seated within the annular hole 5 and preventing the antirotation guide pin sleeve 3 from becoming stuck and unable to move. The utility model patent with announcement number CN215306612U discloses an anti-rotation Kirschner wire guide for a femoral neck dynamic cross nail system (hereinafter referred to as "the patent"). The difference between the patent and this application is that the FNS guide sleeve and the anti-rotation Kirschner wire sleeve of the patent are arranged longitudinally and parallel to one end of the handle and form an integral structure with the handle. In this application, the anti-rotation guide sleeve 3 and the central guide sleeve 4 are not arranged in parallel. During surgery, when medical staff need to install the FNS frame, the anti-rotation guide 7 will block the installation of the FNS frame, affecting subsequent surgical operations. Moreover, during simultaneous surgical operations, there may be situations where the patient's wound is divided into left and right sides. By moving the anti-rotation guide sleeve 3 up and down, this application can always keep the anti-rotation guide 7 in front of and above the central guide 8, which conforms to the surgical operation specifications. However, the design of the patent is in a parallel position, which will lead to a "reverse operation" situation when treating the patient's wound. This not only will the FNS guide sleeve block the installation of the FNS frame, but it will also be inconvenient to insert the FNS guide wire into the femur.

[0015] The structure of this utility model is an improvement on the existing parallel guide (translator), which can save time and improve efficiency in actual surgery. Moreover, when using it, there is no need to consider whether the patient's wound is on the left or right side.

[0016] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. The antirotation guide pin translator of the femoral neck dynamic cross nail system, comprising: The handle (1), the head (2), the anti-rotation guide sleeve (3), the central guide sleeve (4) and the annular hole (5) are characterized in that the handle (1) and the head (2) are integrally formed, the handle (1) and the head (2) are at a 30-degree angle, the central guide sleeve (4) is fixedly installed on the elliptical head (2), the surface of the head (2) has an elliptical annular hole (5), and the anti-rotation guide sleeve (3) is connected to the head (2) through the annular hole (5).

2. The antirotation guide pin translation device of the femoral neck dynamic cross nail system according to claim 1, characterized in that, An anti-rotation guide needle (7) is installed inside the anti-rotation guide needle sleeve (3), and a central guide needle (8) is installed inside the central guide needle sleeve (4).

3. The antirotation guide pin translation device of the femoral neck dynamic cross nail system according to claim 2, characterized in that, The anti-rotation guide needle (7) is equipped with a medullary expander (6).

4. The antirotation guide pin translation device of the femoral neck dynamic cross nail system according to claim 1, characterized in that, The length of the anti-rotation guide needle sleeve (3) is equal to the length of the central guide needle sleeve (4).

5. The antirotation guide pin translator of the femoral neck dynamic cross nail system according to claim 4, characterized in that, The central guide sleeve (4) is located above the annular hole (5).

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