Channel screw positioning instrument

Abstract

The utility model relates to the technical field of medical instruments, and discloses a channel screw positioning instrument which comprises a positioner main body, a guide sleeve, a locking mechanism, an adapter and an adjusting device, the positioner main body is of an arc-shaped structure, and the top end of the positioner main body is connected with the adjusting device. The positioner main body and the adjusting device are made of medical grade stainless steel or polymer materials; the guide sleeve is in sliding fit with the adjusting device and slides in the length direction of the adjusting device, and an observation opening is formed in the guide sleeve and used for facilitating observation of a doctor and guiding insertion of a screw; sliding blocks are connected to the front side and the rear side of the middle of the guide sleeve correspondingly and slide in the second sliding grooves. The channel screw positioning instrument is easy and convenient to operate, the fracture part is stabilized by placing the screws in the white channel of the pelvis and the hip, and fracture healing and functional recovery are promoted; compared with a traditional operation method, the technology has the advantages of being small in trauma, fast in recovery, short in operation time and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a channel screw positioning device. Background Art

[0002] Hip-pelvic fracture is a common type of fracture that requires precise surgical techniques and appropriate tools to repair. Therefore, in order to minimize the complication rate of pelvic fractures, accurate reduction and fixation are very important for the postoperative functional recovery of patients with unstable pelvic fractures. Existing screw positioners usually require manual operation, lack precision and stability, and are prone to surgical failure or adverse consequences. Therefore, it is necessary to develop a hip-pelvic channel screw positioner that can improve positioning accuracy and stability.

[0003] Although the above-mentioned channel screw positioner device can be used to repair pelvic fractures, it is found that there are still several disadvantages in its actual use, which causes the channel screw positioner to fail to achieve the best use effect in actual application. Its disadvantages can be summarized as follows:

[0004] 1. The irregular anatomical structure of the pelvis and the complex displacement types make conventional fixation extremely difficult.

[0005] 2. The traditional treatment method, open reduction and plate internal fixation, can directly visualize the injured area and facilitate anatomical reduction. However, due to the deep location of the pelvis, the surgical approach requires a large incision and extensive soft tissue stripping, which increases the risk of important blood vessel and nerve damage and healing problems such as incision infection, and subsequent surgical treatment is also very difficult.

[0006] The existing traditional treatment method is open reduction and plate fixation, which can directly visualize the injured area and facilitate anatomical reduction. However, due to the deep location of the pelvis, the surgical approach requires a large incision and extensive soft tissue stripping, which increases the risk of important vascular and nerve damage and healing problems such as wound infection. Subsequent surgical treatment is also very difficult. Further improvement is urgently needed. How to develop a pelvic fracture channel screw technology that is simple to operate, highly accurate, and has a high fault tolerance rate can avoid the above intraoperative or postoperative complications caused by extensive open reduction, and has gradually become a research hotspot for orthopedic surgeons in the treatment of pelvic fractures. Utility Model Content

[0007] The purpose of the utility model is to provide a channel screw positioning instrument, which can better preserve joint function, speed up postoperative recovery and reduce the chance of complications; it is simple to manufacture and has good repeatability, thus avoiding human errors and saving operation time; at the same time, it reduces medical expenses and improves patient satisfaction, making it more suitable for practical use, so as to solve the problems of existing channel screw implantation proposed in the above-mentioned background technology, such as the pelvis is an irregular bone, the screw channel range is small, and the fault tolerance rate is low, so repeated fluoroscopy and adjustment are required during the operation to obtain satisfactory positioning, which increases the operation time and the amount of bleeding.

[0008] To achieve the above purpose, the utility model provides the following technical solutions: a channel screw positioning device, including a positioner body, a first slide groove, a second slide groove, a guide sleeve, a slider, a locking mechanism, a nut, a screw, an adapter, and an adjusting device.

[0009] The positioner body is configured as an arc-shaped structure, the top of the positioner body is connected to the adjustment device, the positioner body and the adjustment device are made of medical grade stainless steel or polymer material, and the adjustment device is provided with an opening corresponding to the pelvic passage to allow the screw to pass through;

[0010] The guide sleeve is slidably matched with the adjustment device and slides along the length direction of the adjustment device. The guide sleeve is provided with an observation port for facilitating the doctor to observe and guide the insertion of the screw. Both the front and rear sides of the middle part of the guide sleeve are connected with a slider, and the slider slides in the second slide groove.

[0011] The locking mechanism is provided between the adjusting device and the guide sleeve, and is used to prevent the guide sleeve from sliding during the operation;

[0012] The adapter is arranged at the end of the positioner body and is used in conjunction with an operating table or a surgical tool.

[0013] Furthermore, a first slide groove is provided on the top of the adjusting device, and a second slide groove is provided on the front and back sides of the adjusting device.

[0014] Furthermore, the guide sleeve is configured as a funnel structure.

[0015] Furthermore, the locking mechanism includes a nut and a screw, the screw is connected to the slider of the guide sleeve, and a nut is provided on the screw for locking the adjusting device and the guide sleeve.

[0016] Furthermore, the top of the guide sleeve is arranged between the first slide grooves.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. Easy to operate, by placing screws in the pelvic acetabular channel to stabilize the fracture site, promote fracture healing and functional recovery;

[0019] 2. Less trauma. Compared with traditional surgical methods, this technology has the advantages of less trauma, faster recovery and shorter operation time;

[0020] 3. Quick recovery, which is beneficial to the patient's postoperative recovery;

[0021] 4. High precision, two points determine a line to quickly obtain a satisfactory positioning channel. After inserting the positioning Kirschner wire, confirm with fluoroscopy, and then insert the hollow screw or full cortical screw to achieve the minimally invasive channel screw fixation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the guide sleeve and the locking mechanism of the utility model;

[0026] Figure 4 It is a cross-sectional view of the utility model.

[0027] In the figure: 1. Positioner body, 11. Slide groove 1, 12. Slide groove 2, 2. Guide sleeve, 21. Slider, 3. Locking mechanism, 31. Nut, 32. Screw, 4. Adapter, 5. Adjustment device. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] 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. Obviously, 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.

[0031] See also Figure 1-4 The utility model provides a technical solution: a channel screw positioning device, including a positioner body 1, a slide groove 11, a slide groove 2 12, a guide sleeve 2, a slider 21, a locking mechanism 3, a nut 31, a screw rod 32, an adapter 4, and an adjustment device 5.

[0032] The positioner body 1 is configured as an arc-shaped structure, the top of the positioner body 1 is connected to the adjustment device 5, the positioner body 1 and the adjustment device 5 are made of medical grade stainless steel or polymer material, the adjustment device 5 is provided with an opening corresponding to the pelvic passage to allow the screw to pass through; a slide groove 11 is provided on the top of the adjustment device 5, and slide grooves 2 12 are provided on the front and back of the adjustment device 5;

[0033] The guide sleeve 2 is slidably matched with the adjustment device 5 and slides along the length direction of the adjustment device 5. The guide sleeve 2 is provided with an observation port for facilitating the doctor to observe and guide the insertion of the screw; the guide sleeve 2 is configured as a funnel structure, and the front and rear sides of the middle of the guide sleeve 2 are connected with sliders 21, the slider 21 slides in the second slide groove 12, and the top of the guide sleeve 2 is arranged between the first slide groove 11;

[0034] The locking mechanism 3 is provided between the adjusting device 5 and the guide sleeve 2, and is used to prevent the guide sleeve 2 from sliding during the operation. The locking mechanism 3 includes a nut 31 and a screw 32. The screw 32 is connected to the slider 21 of the guide sleeve 2. The screw 32 is provided with a nut 31, and is used to lock the adjusting device 5 and the guide sleeve 2. The locking mechanism 3 includes a thread locking mechanism, a friction locking mechanism or other suitable locking mechanisms.

[0035] The adapter 4 is disposed at the end of the positioner body 1 for use with an operating table or a surgical tool. The adapter 4 may include a magnetic adapter, a mechanical adapter or other suitable adapters.

[0036] Here’s how to use it:

[0037] First use the locator body 1 to position, then slide and adjust the position of the guide sleeve 2 on the adjustment device 5, and use the locking mechanism 3 to lock it. After minimally invasive insertion of one end, adjust the needle entry point, and determine a line between the two points to quickly obtain a satisfactory positioning channel. After inserting the positioning Kirschner wire, confirm with fluoroscopy, and then insert a hollow screw or a full cortical screw to achieve the minimally invasive channel screw fixation requirements.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A channel screw positioning device, comprising a positioner body (1), a first slide groove (11), a second slide groove (12), a guide sleeve (2), a slider (21), a locking mechanism (3), a nut (31), a screw rod (32), an adapter (4), and an adjusting device (5), characterized in that: The positioner body (1) is configured as an arc-shaped structure, the top end of the positioner body (1) is connected to the adjustment device (5), the positioner body (1) and the adjustment device (5) are made of medical grade stainless steel or polymer material, and the adjustment device (5) is provided with an opening corresponding to the pelvic passage to allow a screw to pass through; The guide sleeve (2) is slidably matched with the adjustment device (5) and slides along the length direction of the adjustment device (5). The guide sleeve (2) is provided with an observation port for facilitating the doctor to observe and guide the insertion of the screw. The front and rear sides of the middle of the guide sleeve (2) are both connected with a slider (21), and the slider (21) slides in the second slide groove (12). The locking mechanism (3) is arranged between the adjusting device (5) and the guide sleeve (2) and is used to prevent the guide sleeve (2) from sliding during the operation; The adapter (4) is arranged at the end of the positioner body (1) and is used in conjunction with an operating table or surgical tools.

2. A channel screw positioning instrument according to claim 1, characterized in that: A first slide groove (11) is provided on the top of the adjusting device (5), and a second slide groove (12) is provided on the front and back sides of the adjusting device (5).

3. A channel screw positioning instrument according to claim 1, characterized in that: The guide sleeve (2) is configured as a funnel structure.

4. A channel screw positioning instrument according to claim 1, characterized in that: The locking mechanism (3) comprises a nut (31) and a screw rod (32), wherein the screw rod (32) is connected to a slider (21) of a guide sleeve (2), and a nut (31) is arranged on the screw rod (32) for locking the adjusting device (5) and the guide sleeve (2).

5. The channel screw positioning instrument according to claim 1, characterized in that: The top of the guide sleeve (2) is arranged between the slide grooves (11).

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