Auxiliary device for placing steel plate in middle

Abstract

The utility model provides an auxiliary device for placing a steel plate in the middle, which comprises double-joint seaming pliers, jaws of the two double-joint seaming pliers respectively clamp bone cortex, and the tail end of a handle of any double-joint seaming pliers is provided with a zigzag locker. Any pair of double-joint nipping pliers is provided with middle lock catches which are arranged at intervals in the length direction of the double-joint nipping pliers, sleeves are arranged on the two middle lock catches respectively, circular rings are arranged at the ends, away from the double-joint nipping pliers, of the two sleeves, and a third sleeve is arranged in the two circular rings jointly; the third sleeves are located on the center line of the double-joint seaming pliers, the other ends of the two third sleeves are both installed on the center line of the long axis of the steel plate, and the steel plate is placed in the middle of a small incision of a patient. According to the utility model, the jaws of the two double-joint seaming forceps are respectively used for clamping the bone cortex, so that the steel plate can be accurately placed in the middle through a small incision, the trauma is smaller, the bleeding is less, the operation time is shortened, the operation success rate is improved, and the perspective frequency is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of surgical plate placement technology, specifically to an auxiliary device for centrally placing a steel plate. Background Technology

[0002] Most fracture patients require open reduction and internal fixation with plates, or limited open reduction and internal fixation with plates. To promote healing, the plates are generally placed centrally along the long axis of the long bone shaft, and also to ensure a better fit (some plates are anatomical plates). Properly placed plates reduce the probability of nonunion and the risk of screw breakage; they also better assist in fracture reduction; and X-rays are more visually appealing, leading to higher patient and family satisfaction. However, current surgical instruments make precise central placement difficult, resulting in the following technical limitations: 1) Most bones are not regular cylindrical or prismatic shapes. Although many bones are called long bones, such as the tibia, fibula, femur, humerus, radius, and ulna, clinical observations show that none of their surfaces are perfectly smooth. Therefore, anatomical plates are designed for different locations and surfaces to achieve better fit between the plate and the bone surface, thus reaching the optimal mechanical solution. However, in practice, perfect fit between the plate and bone surface is difficult to achieve, partly because the plate is not placed correctly, often too close to the bone. One reason is that the plate is not placed at the end or far from the end. Another important reason is that the plate is not centered. This reason is often overlooked and may eventually lead to nonunion, delayed bone healing, screw loosening, and plate and screw breakage. 2) In order to achieve centered placement of the plate during surgery, a longer incision is made to fully expose the required length of the plate. Direct vision is used to judge whether the plate is centered. The plate is repeatedly adjusted until it is roughly centered before fixation. Another method is to use a finger to touch the plate and fix it when it is roughly in the middle of the bone cortex. Yet another method is to use Kirschner wires for temporary fixation and check whether it is centered under fluoroscopy. If there is a deviation, it is repeatedly adjusted until it is centered before fixation. The above surgical procedures are relatively crude, time-consuming, and involve long incisions, significant trauma, and multiple fluoroscopy sessions, increasing the risk of radiation exposure for medical staff and patients; 3) In particular, with more and more doctors now using the Mippo technique for open reduction and internal fixation of fractures, it is impossible to achieve centered placement of the plate under direct vision. If the plate is placed off-center, stress concentration may occur, leading to screw and plate breakage, screw loosening, delayed fracture healing, or nonunion; off-center placement of the plate may result in refracture around the prosthesis or refracture after removal of the internal fixation device, and may also damage nerves, muscles, tendons, and blood vessels; 4) Off-center placement of the plate is frequently encountered in clinical practice. During the screwing process, the compression and torsion of the bone by the screw and plate may cause the fracture reduction to be lost again, requiring repeated adjustments or leading to surgical failure.

[0003] Therefore, designing an auxiliary device for placing the steel plate in the center has become an urgent problem to be solved. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention provides an auxiliary device for placing a steel plate in the center, so as to solve at least one of the above-mentioned technical problems.

[0005] The technical solution of this utility model is: an auxiliary device for centrally placing a steel plate, including symmetrically arranged double-jointed biting forceps, the jaws of the two double-jointed biting forceps clamping the bone cortex respectively, a serrated locking device being provided at the end of the handle of each double-jointed biting forceps, and intermediate locking buckles being provided at intervals in each double-jointed biting forceps, the two intermediate locking buckles being arranged along the length direction of the double-jointed biting forceps, a sleeve being provided on each of the two intermediate locking buckles, a ring being provided at the end of the two sleeves away from the double-jointed biting forceps, a third sleeve being provided in the two rings, the third sleeve being located on the center line of the double-jointed biting forceps, the ends of the two third sleeves near the jaws being installed on the center line of the long axis of the steel plate, and the steel plate being centrally placed in the patient's small incision.

[0006] This invention employs a third sleeve located on the center line of a double-jointed biting forceps, mounted on the center line of the long axis of a steel plate. The jaws of the two double-jointed biting forceps clamp the cortical bone, and the steel plate is placed centrally within the patient's small incision. This allows for precise centered placement of the steel plate through a small incision, resulting in less trauma, less bleeding, shorter surgical time, significantly reduced fluoroscopy sessions, reduced radiation exposure to patients and medical staff, lower requirements for the surgeon, time savings, increased surgical success rate, and improved patient satisfaction, thus creating favorable conditions for surgical clinical work. Attached Figure Description

[0007] Figure 1 This is the front view of the present invention.

[0008] Figure 2 This is the left view of the present invention.

[0009] Figure 3 This is a front view of the installation structure of this utility model.

[0010] In the diagram: 1. Double-jointed jaw pliers; 2. First sleeve; 3. Second sleeve; 4. Third sleeve; 5. Steel plate. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] See Figure 1-3The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0013] Example 1: An auxiliary device for centrally placing a steel plate, referenced Figure 2 , Figure 3 The device includes symmetrically arranged double-jointed jaw clamps 1, with the jaws of the two clamps 1 clamping the cortical bone respectively. Each clamp 1 has a serrated locking device at the end of its handle. When the jaws clamp the cortical bone, the serrated locking device can be lowered to prevent the jaws from loosening. Each clamp 1 has a spaced intermediate locking buckle. The two intermediate locking buckles are arranged along the length of the clamp 1. Each intermediate locking buckle has a sleeve. The ends of the two sleeves away from the clamp 1 have a ring. A third sleeve 4 is arranged in both rings. The third sleeve 4 is located on the center line of the clamp 1. The ends of the two third sleeves 4 near the jaws are installed on the center line of the long axis of the steel plate 5. The steel plate 5 is placed centrally in the patient's small incision. This invention employs a third sleeve located on the centerline of a double-jointed jaw clamp, mounted on the long axis centerline of a steel plate. The jaws of the two double-jointed jaw clamps the cortical bone, ensuring the steel plate is positioned on the bisector of the cortical bone. The plate is centered within the patient's small incision, allowing for simple, quick, and precise placement of the plate on the midline of the cortical bone without direct visualization or fluoroscopy. This ensures both the proximal and distal ends are on the midline of the cortical bone. This device enables centered placement of the steel plate through a small incision, making it particularly suitable for open reduction and internal fixation of fractures using the Mippo technique. It results in minimal surgical trauma, simple and precise operation, less bleeding, shorter surgical time, significantly reduced fluoroscopy exposure, reduced radiation exposure for patients and medical staff, lower requirements for the surgeon, time savings, prevention of repositioning loss, improved surgical quality, increased success rate, and increased patient satisfaction, creating favorable conditions for surgical clinical work.

[0014] Example 2: Based on Example 1, with reference to... Figure 1The two sleeves correspond to the first sleeve 2 and the second sleeve 3, respectively, and the first sleeve 2 and the second sleeve 3 are located on the center line of the double-jointed jaw clamp 1. In this utility model, the first sleeve and the second sleeve are located on the center line of the double-jointed jaw clamp, and the third sleeve is also located on the center line of the double-jointed jaw clamp. The third sleeve is installed on the center line of the long axis of the steel plate, ensuring that the steel plate is located on the bisector of the cortical bone clamped by the jaws.

[0015] Example 3: Based on Example 2, several threaded holes are arranged at intervals along the long axis centerline of the steel plate 5; a threaded section is provided at the end of the third sleeve 4 near the steel plate 5, and the threaded section engages with the corresponding threaded hole. This utility model uses a threaded section at the end of the third sleeve near the steel plate, with the threaded section engaging with the corresponding threaded hole to install the third sleeve along the long axis centerline of the steel plate, ensuring that the steel plate is located on the bisector of the cortical bone clamped by the jaws.

[0016] Example 4: Based on Example 3, the first sleeve 2 and the second sleeve 3 have the same structure. The end of the first sleeve 2 near the double-jointed jaw pliers 1 is a pin, which is installed in the middle locking hole of the double-jointed jaw pliers 1. This invention uses the end of the first sleeve near the double-jointed jaw pliers as a pin, and installs the first sleeve and the second sleeve on the center line of the double-jointed jaw pliers.

[0017] In practice, two double-jointed jaw pliers 1 are often used together, or one double-jointed jaw pliers 1 is used twice.

[0018] The above-described embodiments are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. An auxiliary device for centrally placing a steel plate, comprising symmetrically arranged double-jointed jaw pliers (1), characterized in that: The jaws of the two joint biting forceps (1) clamp the bone cortex respectively. A serrated locking device is provided at the end of the handle of each joint biting forceps (1). Each joint biting forceps (1) is provided with a spaced intermediate locking buckle. The two intermediate locking buckles are arranged along the length of the joint biting forceps (1). A sleeve is provided on each of the two intermediate locking buckles. A ring is provided at the end of the two sleeves away from the joint biting forceps (1). A third sleeve (4) is provided in both rings. The third sleeve (4) is located on the center line of the joint biting forceps (1). The ends of the two third sleeves (4) near the jaws are installed on the center line of the long axis of the steel plate (5). The steel plate (5) is placed in the center of the patient's small incision.

2. The auxiliary device for centrally placing a steel plate according to claim 1, characterized in that: The two sleeves correspond to the first sleeve (2) and the second sleeve (3) respectively, and the first sleeve (2) and the second sleeve (3) are located on the center line of the double joint biting pliers (1).

3. The auxiliary device for centrally placing a steel plate according to claim 2, characterized in that: Several screw holes are arranged at intervals along the long axis centerline of the steel plate (5).

4. The auxiliary device for centrally placing a steel plate according to claim 3, characterized in that: The third sleeve (4) has a threaded section at one end near the steel plate (5), and the threaded section engages with the corresponding screw hole.

5. The auxiliary device for centrally placing a steel plate according to claim 3, characterized in that: The first sleeve (2) and the second sleeve (3) have the same structure. The first sleeve (2) has a pin at one end near the double joint bite pliers (1), and the pin is installed in the middle locking hole of the double joint bite pliers (1).

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