Arthroscopic bone grafting positioner accurate in positioning and not prone to dislocation

Abstract

The utility model relates to the field of medical instruments, and discloses an arthroscopic bone grafting positioner which is accurate in positioning and not prone to dislocation, the arthroscopic bone grafting positioner comprises a positioning structure, a threading structure and two sleeves, the positioning structure is provided with a guide sliding groove structure, and the guide sliding groove structure comprises a guide sliding groove handle. An arc-shaped plate is fixedly connected to the position, close to the lower end, of the center of the front side wall of the guide sliding groove handle, a sliding groove is formed in the center of the lower end face of the arc-shaped plate, the threading structure comprises a sleeve rod, a side plate is fixedly connected to the center of one side wall of the sleeve rod, and wire holes are formed in the centers of the rear side walls of the sleeve rod and the side plate respectively. According to the utility model, the guide chute structure is arranged, so that before use, the guide chute structure can extend into the joint cavity, the subsequent installation of the positioning structure is facilitated, the installation is convenient, and the damage to the soft tissue of a patient can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of medical appliances, in particular to an arthroscopic bone graft locator with accurate positioning and not easy to be misaligned. Background Technique

[0002] Traditional shoulder joint dislocation can lead to fracture of the glenoid cavity of the scapula or even bone defect of the glenoid cavity, resulting in instability of the shoulder joint and repeated dislocations; in the previous treatment process, a 15-cm incision needs to be made in the front of the shoulder joint for bone grafting surgery, and the resected coracoid process can be used for bone grafting, that is, the traditional Latarjet bone grafting surgery.

[0003] Since the appearance of arthroscope, many people have begun to try to complete the Latarjet bone grafting surgery under arthroscope to reduce the trauma to patients; however, the surgical incision of arthroscope is small, about 8-10 mm, and it is impossible to completely expose the glenoid cavity like traditional open surgery. During the bone grafting process, the transplanted bone block cannot determine the fixed position under arthroscope; therefore, how to accurately place the transplanted bone block at the position of the bone defect of the glenoid cavity under arthroscope and firmly fix it is the key to the success of the surgery; it is also the difficulty of the current Latarjet modified surgery under arthroscope.

[0004] The existing fixing method is to use a locator for the glenoid cavity of the scapula. Then, a single-channel bone tunnel is prepared under the articular surface of the glenoid cavity. Then, the medical high-strength suture pre-tied on the transplanted bone block is passed from the front of the glenoid cavity, through the bone tunnel under the articular surface to the back, and a loop plate is passed through at the back as a block for knotting and fixing. However, this single-bone-tunnel fixing method is prone to rotation and misalignment at the connection between the bone block and the glenoid cavity after completion, and the stability is poor. At the same time, the existing threading method is not convenient, and the existing fixing structure is also not convenient for connection during installation and positioning. Therefore, the technical personnel in this field have provided an arthroscopic bone graft locator, which can prepare two bone tunnels at the same time and fix through a double-channel to solve the problems proposed in the above background technique. Content of the Utility Model

[0005] The purpose of the utility model is to solve the disadvantages existing in the prior art, and to propose an arthroscopic bone graft locator with accurate positioning and not easy to be misaligned. By inserting the arc-shaped plate along the wound of the patient, and then inserting the positioning structure along the direction of the arc-shaped plate, a good guiding effect is achieved. Then, by installing the threading structure on the side wall of the positioning structure and drilling the side of the glenoid cavity of the scapula with two Kirschner wires along the two wire holes respectively, the fixing distance and position can be guaranteed. Then, after disassembling other structures, two sleeves are used to pass from the back to the front of the glenoid cavity along the direction of the Kirschner wires, and then the Kirschner wires are removed, leaving only two sleeves, which is convenient for threading operation.

[0006] To achieve the above object, the present utility model provides the following technical solutions: An arthroscopic bone graft locator with accurate positioning and not easily displaced, including a positioning structure, a threading structure, and two sleeves. The positioning structure is equipped with a guiding chute structure, and the guiding chute structure includes a guiding chute handle. At the lower end of the center of the front side wall of the guiding chute handle, an arc-shaped plate is fixedly connected. At the center of the lower end face of the arc-shaped plate, a chute is provided. The threading structure includes a sleeve rod. At the center of one side wall of the sleeve rod, a side plate is fixedly connected. Thread holes are respectively provided at the centers of the rear side walls of the sleeve rod and the side plate;

[0007] Through the above technical solutions, during use, by inserting the arc-shaped plate along the patient's wound, and then inserting the positioning structure along the direction of the arc-shaped plate, a good guiding effect is achieved. Then, by installing the threading structure on the side wall of the positioning structure, two Kirschner wires are respectively used to drill holes in the side of the glenoid cavity along the two thread holes, which can ensure the fixed spacing and position. Then, after disassembling other structures, two sleeves are used to pass from the rear along the direction of the Kirschner wires to the front of the glenoid cavity, and then the Kirschner wires are removed, leaving only two sleeves, which is convenient for threading operation.

[0008] Further, the positioning structure includes a main body. At the upper end of the center of the front side wall of the main body, an inclined rod is fixedly connected. On the front side wall of the inclined rod, a positioning hook is fixedly connected. At the center of the front side wall of the main body at the lower end of the inclined rod, a movable hole is provided. The rear end of the movable hole penetrates the front side wall of the main body and leads to the rear end. On one side wall of the main body near the movable hole, a through groove is provided. The through groove penetrates one side wall of the main body and leads to the inside of the movable hole. A positioning rod is provided inside the movable hole. At the center of the upper end face of the positioning rod, a plurality of positioning teeth are provided. On the rear side wall of the positioning rod, a tail seat is provided. At the rear side of the center of the upper end face of the main body, a positioning hole is provided. The lower end of the positioning hole penetrates the upper end face of the main body and leads to the inside of the movable hole. A positioning needle is provided inside the positioning hole. Inside the positioning hole above the positioning needle, a screw is threadedly connected;

[0009] Through the above technical solutions, during use, by fixing the inclined rod and the positioning hook at one end of the bone, the connection of the two bones is clamped and fixed by the positioning rod. After adjusting the position, the positioning needle is inserted along the positioning hole. The lower end of the positioning needle is mutually adapted to the positioning teeth. Then, the adjusted position is pressed and restricted by the screw, thereby achieving fixation.

[0010] Further, the positioning teeth are mutually adapted to the lower end of the positioning needle;

[0011] Through the above technical solutions, it is convenient to adjust the length of the positioning rod.

[0012] Further, the lower end of the guiding chute structure is slidably connected to the upper end surface of the positioning structure in a matching manner;

[0013] Through the above technical solution, before use, the guiding chute structure is adopted to expand the wound of the patient, which is convenient for the installation and penetration of the positioning structure, and reduces excessive damage to the patient's wound.

[0014] Further, the diameters of the two wire holes are the same;

[0015] Through the above technical solution, while facilitating drilling and positioning, it is convenient to draw out the lead wire from the inside subsequently.

[0016] Further, the inside of the positioning rod is hollow;

[0017] Through the above technical solution, it is convenient for the steel needle to pass through.

[0018] Further, one ends of the two sleeves and one end of the positioning rod are respectively provided with serrations;

[0019] Through the above technical solution, it has a good anti-slip effect and avoids sliding and dislocation when contacting the bone surface.

[0020] Further, the sleeve and the wire hole are mutually adapted;

[0021] Through the above technical solution, it is convenient for the sleeve to pass through the wire hole, so as to be connected to the bone, and is convenient for subsequent wire threading operations.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, by setting the guiding chute structure, before use, the guiding chute structure can penetrate into the inside of the joint cavity, which is convenient for the subsequent installation of the positioning structure, easy to install, and can reduce damage to the patient's soft tissue.

[0024] 2. In the utility model, by setting the wire threading structure, when in use, it cooperates well with the positioning structure, and can realize drilling two holes on the bone wall at the same time, which is convenient for connecting and fixing with two wires, and is more stable and has a smaller wound surface than the existing structure.

[0025] 3. In the utility model, by adopting the sleeve, when in use, the two sleeves are inserted into the inside of the bone along the direction of the steel needle, and then the steel needle is removed, which is convenient for wire threading operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Is an axonometric view of an arthroscopic bone graft positioning device with accurate positioning and not easy to be displaced proposed by the utility model;

[0027] Figure 2 Exploded axonometric view of the positioning structure in an arthroscopic bone graft locator with accurate positioning and not easily displaced proposed by the present utility model;

[0028] Figure 3 Axonometric view of the wire threading structure in an arthroscopic bone graft locator with accurate positioning and not easily displaced proposed by the present utility model;

[0029] Figure 4 Axonometric view of the guiding chute structure in an arthroscopic bone graft locator with accurate positioning and not easily displaced proposed by the present utility model;

[0030] Figure 5 Axonometric view of the sleeve in an arthroscopic bone graft locator with accurate positioning and not easily displaced proposed by the present utility model;

[0031] Figure 6 Side view of the main body in an arthroscopic bone graft locator with accurate positioning and not easily displaced proposed by the present utility model.

[0032] Legend:

[0033] 1. Positioning structure; 101. Through groove; 102. Positioning teeth; 103. Positioning rod; 104. Positioning hook; 105. Inclined rod; 106. Moving hole; 107. Tail seat; 108. Positioning needle; 109. Screw; 110. Positioning hole; 111. Main body; 2. Guiding chute structure; 201. Chute; 202. Arc plate; 203. Guiding chute handle; 3. Wire threading structure; 301. Wire hole; 302. Side plate; 303. Sleeve rod; 4. Sleeve. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0035] Refer to Figures 1-6, an embodiment provided by the present utility model: an arthroscopic bone graft locator with accurate positioning and not prone to dislocation, including a positioning structure 1, a wire threading structure 3 and two sleeves 4. The positioning structure 1 is equipped with a guiding chute structure 2, and the guiding chute structure 2 includes a guiding chute handle 203. At the lower end of the front side wall center of the guiding chute handle 203, an arc plate 202 is fixedly connected. At the center of the lower end face of the arc plate 202, a chute 201 is provided. The wire threading structure 3 includes a sleeve rod 303. At the center of one side wall of the sleeve rod 303, a side plate 302 is fixedly connected. Wire holes 301 are respectively provided at the centers of the rear side walls of the sleeve rod 303 and the side plate 302. During use, the arc plate 202 is inserted along the patient's wound, and then the positioning structure 1 is inserted along the direction of the arc plate 202 to play a good guiding role. Then, the wire threading structure 3 is installed on the side wall of the positioning structure 1, and two Kirschner wires are respectively used to drill holes in the side of the glenoid fossa along the two wire holes 301, which can ensure the fixed spacing and position. Then, after disassembling other structures, two sleeves 4 are used to pass from the rear to the front of the glenoid fossa along the direction of the Kirschner wires, and then the Kirschner wires are removed, leaving only two sleeves 4, which is convenient for wire threading operation.

[0036] The positioning structure 1 includes a main body 111. At the upper end of the front side wall center of the main body 111, an inclined rod 105 is fixedly connected. On the front side wall of the inclined rod 105, a positioning hook 104 is fixedly connected. At the center of the front side wall of the main body 111 at the lower end of the inclined rod 105, a movable hole 106 is provided. The rear end of the movable hole 106 penetrates the front side wall of the main body 111 and leads to the rear end. On one side wall of the main body 111 near the movable hole 106, a through groove 101 is provided. The through groove 101 penetrates one side wall of the main body 111 and leads to the inside of the movable hole 106. A positioning rod 103 is arranged inside the movable hole 106. At the center of the upper end face of the positioning rod 103, a plurality of positioning teeth 102 are provided. A tail seat 107 is arranged on the rear side wall of the positioning rod 103. At the center of the upper end face of the main body 111 near the rear side, a positioning hole 110 is provided. The lower end of the positioning hole 110 penetrates the upper end face of the main body 111 and leads to the inside of the movable hole 106. A positioning pin 108 is arranged inside the positioning hole 110. A screw 109 is threadedly connected inside the positioning hole 110 above the positioning pin 108. During use, the inclined rod 105 and the positioning hook 104 are fixed at one end of the bone, and the connection of the two bones is clamped and fixed by the positioning rod 103. After adjusting the position, the positioning pin 108 is inserted along the positioning hole 110, and the lower end of the positioning pin 108 is adapted to the positioning teeth 102. Then, the adjusted position is pressed and restricted by the screw 109, so as to achieve fixation. The entire operation process of positioning and bone tunnel preparation is carried out under the arthroscope, without incising the skin, with less trauma, ensuring the stability of intraoperative operation, and can be quickly locked.

[0037] The lower ends of the positioning teeth 102 and the positioning needle 108 are mutually adapted to facilitate the adjustment of the length of the positioning rod 103. The lower end of the guiding chute structure 2 is slidably connected to the upper end surface of the positioning structure 1. Before use, the guiding chute structure 2 is used to expand the patient's wound, facilitating the installation and penetration of the positioning structure 1 and reducing excessive damage to the patient's wound. The diameters of the two wire holes 301 are the same, facilitating drilling and positioning, and at the same time facilitating the subsequent extraction of the lead wire from the inside. The inside of the positioning rod 103 is hollow to facilitate the penetration of the steel needle. One ends of the two sleeves 4 and one end of the positioning rod 103 are respectively provided with serrations, which have a good anti-slip effect and prevent sliding and dislocation when contacting the bone surface. The sleeve 4 and the wire hole 301 are mutually adapted to facilitate the sleeve 4 to pass through the wire hole 301 and thus connect to the bone, facilitating the subsequent wire threading operation.

[0038] Working principle: The present utility model is an arthroscopic bone grafting locator with accurate positioning and not easy to be misaligned. When in use, the arc-shaped plate 202 is inserted deeply along the patient's wound, and then the positioning structure 1 is inserted deeply along the direction of the arc-shaped plate 202, playing a good guiding role. Then, the wire threading structure 3 is installed on the side wall of the positioning structure 1, and two Kirschner wires are used to drill holes in the side surface of the glenoid cavity along the two wire holes 301 respectively, which can ensure the fixed spacing and position. Then, after disassembling other structures, the two sleeves 4 are inserted from the rear to the front of the glenoid cavity along the direction of the Kirschner wires, and then the Kirschner wires are removed, leaving only the two sleeves 4, which is convenient for wire threading operation. By fixing the inclined rod 105 and the positioning hook 104 at one end of the bone, the connection of the two bones is clamped and fixed by the positioning rod 103. After adjusting the position, the positioning needle 108 is inserted along the positioning hole 110. The lower end of the positioning needle 108 is mutually adapted to the positioning teeth 102, and then the adjusted position is pressed and restricted by the screw 109, thus achieving fixation. The entire operation process of positioning and bone tunnel preparation is carried out under the arthroscope, without incising the skin, with less trauma, ensuring the stability of the intraoperative operation and allowing for quick locking.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An arthroscopic bone grafting locator with accurate positioning and non-dislocation, comprising a positioning structure (1), a threading structure (3) and two sleeves (4), characterized in that: The positioning structure (1) is equipped with a guide slide groove structure (2), the guide slide groove structure (2) comprises a guide slide groove handle (203), a curved plate (202) is fixedly connected at the center of the front side wall of the guide slide groove handle (203) near the lower end, a slide groove (201) is arranged at the center of the lower end surface of the curved plate (202), the threading structure (3) comprises a sleeve rod (303), a side plate (302) is fixedly connected at the center of one side wall of the sleeve rod (303), and a thread hole (301) is respectively arranged at the center of the rear side wall of the sleeve rod (303) and the side plate (302).

2. The arthroscopic bone grafting locator with accurate positioning and non-dislocation according to claim 1, characterized in that: The positioning structure (1) comprises a main body (111), a slanting rod (105) is fixedly connected to the center of the front side wall of the main body (111) near the upper end, a positioning hook (104) is fixedly connected to the front side wall of the slanting rod (105), a movable hole (106) is provided at the center of the front side wall of the main body (111) at the lower end of the slanting rod (105), the rear end of the movable hole (106) penetrates the front side wall of the main body (111) and leads to the rear end, and a through groove (101) is provided on a side wall of the main body (111) close to the side of the movable hole (106), the through groove (101) penetrates the side wall of the main body (111) and leads to the movable hole (106). ), a positioning rod (103) is arranged inside the movable hole (106), a plurality of positioning teeth (102) are arranged at the center of the upper end surface of the positioning rod (103), a tailstock (107) is arranged on the rear side wall of the positioning rod (103), a positioning hole (110) is arranged at the rear side of the center of the upper end surface of the main body (111), the lower end of the positioning hole (110) passes through the upper end surface of the main body (111) and leads to the inside of the movable hole (106), a positioning pin (108) is arranged inside the positioning hole (110), and a screw (109) is threadedly connected to the inside of the positioning hole (110) at the upper end of the positioning pin (108).

3. The arthroscopic bone grafting locator with accurate positioning and resistance to dislocation according to claim 2, characterized in that: The positioning tooth (102) and the lower end of the positioning needle (108) are adapted to each other.

4. The arthroscopic bone grafting locator with accurate positioning and non-dislocation according to claim 1, characterized in that: The lower end of the guide slide groove structure (2) is slidably connected to the upper end surface of the positioning structure (1).

5. The arthroscopic bone grafting locator with accurate positioning and non-dislocation according to claim 1, characterized in that: The diameters of the two wire holes (301) are consistent.

6. The arthroscopic bone grafting positioner with accurate positioning and non-dislocation according to claim 2, characterized in that: The interior of the positioning rod (103) is hollow.

7. The arthroscopic bone grafting positioner with accurate positioning and non-dislocation according to claim 1, characterized in that: One end of the two sleeves (4) and one end of the positioning rod (103) are respectively provided with flower teeth.

8. The arthroscopic bone grafting positioner with accurate positioning and non-dislocation according to claim 1, characterized in that: The sleeve (4) and the wire hole (301) are adapted to each other.

Images