Ulna tunnel positioner

Abstract

The utility model aims at providing a ulna tunnel positioner, it includes guide main body, positioning main body and locking piece, guide main body includes handle, first guide block and second guide block, first guide block sets up in one end of handle, has seted up first guide hole on first guide block, second guide block sets up in the middle of handle, has seted up second guide hole on second guide block, positioning main body includes slide and positioning hook, positioning hook sets up in one end of slide, slide is worn in first guide hole, to make the end of positioning hook away from slide be located on the extension line of the axis of second guide hole, locking piece is screwed on one end of handle close to first guide hole, locking piece is used for top contact slide. Thus, slide can slide in first guide hole, can adjust the position of positioning hook according to the anatomical structure of different patients ulna, has improved the accuracy of positioning, has adapted individual difference, and can improve the accuracy of tunnel positioning, has reduced the operation error caused by inaccurate positioning.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a specific type of medical device. Background Technology

[0002] Wrist arthroscopy is used in numerous treatments, including TFCC (triangular fibrocartilage complex) injuries and fracture management. During these procedures, a locator is typically required. Specifically, in TFCC treatment, a bone tunnel needs to be created in the distal ulna to insert sutures or fix ligaments. Therefore, a locator is used to help medical staff accurately locate the bone tunnel under arthroscopy, thus avoiding damage to surrounding nerves, blood vessels, and articular surfaces. In fracture management, such as ulnar styloid process fractures, where bone fragments have shifted into the joint, wrist arthroscopy is used to remove the fragments and perform reduction and fixation. During this process, the locator assists in drilling a bone tunnel, which ensures the stability of the internal fixation device.

[0003] Chinese patent document CN211934194U discloses a drilling positioning device for the coronoid process of the ulna. This device includes a main body plate, a fixed sleeve, and a movable sleeve. The fixed sleeve is connected to the upper middle part of the main body plate. One end of the main body plate has a handle, and the other end has a hand-support hook. The upper end of the hand-support hook has a positioning hole concentric with the fixed sleeve. The movable sleeve slides inside the fixed sleeve. A movable positioning mechanism for the movable sleeve is provided between the fixed sleeve and the main body plate. By placing the positioning hole of the hand-support hook against the coronoid process of the ulna and aligning it with the drilling position, errors caused by unstable grip during drilling can be reduced. The entire device can be directly aligned with the desired fixation position of the coronoid process, achieving the ideal position in one go, avoiding repeated drilling due to bone channel deviation, and reducing unnecessary damage to the bone.

[0004] However, existing positioning devices have the following shortcomings in practical use: Since different patients require different directions and locations for drilling bone tunnels, and the existing positioning devices have fixed hooks, the gap at the wrist joint is relatively narrow. Without damaging the wrist joint, the adjustable space of the hook's end when inserted into the gap often makes it difficult to place the hook's end at the optimal position on the ulnar end face. Therefore, to solve this technical problem, the ulnar bone tunnel locator of this application is proposed. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an ulnar bone tunnel locator that can accurately locate the end face of the ulna.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An ulnar bone tunnel locator, comprising:

[0008] The guide body includes a grip, a first guide block, and a second guide block. The first guide block is disposed at one end of the grip and has a first guide hole. The second guide block is disposed in the middle of the grip and has a second guide hole.

[0009] A positioning body, comprising a slide rod and a positioning hook, wherein the positioning hook is disposed at one end of the slide rod, and the slide rod passes through a first guide hole, such that the end of the positioning hook away from the slide rod is located on the extension line of the axis of the second guide hole; and

[0010] A locking device is screwed onto one end of the grip rod near the first guide hole, and the locking device is used to abut against the slide rod.

[0011] Optionally, a through hole is provided on the end of the positioning hook away from the slide rod, and the through hole is coaxially arranged with the second guide hole.

[0012] Optionally, the thickness of the end of the positioning hook away from the slide bar is 1mm to 2mm.

[0013] Optionally, a hook is provided on the end of the grip bar away from the slide bar.

[0014] Optionally, the ulnar bone tunnel locator further includes a guide rod, which is adapted to pass through the second guide hole, and one end of the guide rod near the positioning hook is used to abut against the lateral wall of the ulna.

[0015] Optionally, the guide rod has a plurality of spaced-apart protrusions on one end near the positioning hook.

[0016] Optionally, a handle is provided on the end of the guide rod away from the tooth.

[0017] Optionally, a guide hole is provided at the axis of the guide rod.

[0018] Optionally, the ulnar bone tunnel locator further includes a guide pin, which is adapted to pass through the guide hole, and a barb is provided on one end of the guide pin near the positioning hook.

[0019] Optionally, the ulnar bone tunnel locator further includes an inner core and a positioning pin. The inner core is adapted to pass through the guide hole, and a centering hole is opened in the axis of the inner core. The positioning pin is adapted to pass through the centering hole, and one end of the positioning pin near the positioning hook is used to insert into the lateral wall of the ulna.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] This utility model discloses an ulnar bone tunnel locator, comprising a guide body, a positioning body, and a locking device. The guide body includes a handle, a first guide block, and a second guide block. The first guide block is located at one end of the handle and has a first guide hole. The second guide block is located in the middle of the handle and has a second guide hole. The positioning body includes a sliding rod and a positioning hook. The positioning hook is located at one end of the sliding rod, which passes through the first guide hole, such that the end of the positioning hook away from the sliding rod is located on the extension line of the axis of the second guide hole. The locking device is screwed onto the end of the handle near the first guide hole and is used to abut the sliding rod. In this way, the sliding rod can slide within the first guide hole, allowing for flexible adjustment of the position of the positioning hook according to the ulnar anatomy of different patients, improving positioning accuracy and adapting to individual differences. The positioning hook can accurately hook onto specific anatomical landmarks on the ulna, and its position corresponds to the extended axis of the second guide hole. In this way, during subsequent drilling, the drill bit can accurately drill a bone tunnel on the ulna along the direction of the second guide hole, which greatly improves the accuracy of bone tunnel positioning and reduces surgical errors caused by inaccurate positioning. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the ulnar bone tunnel locator according to one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the ulnar bone tunnel locator from another angle;

[0025] Figure 3 This is a schematic diagram of the ulnar bone tunnel locator according to another embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the ulnar bone tunnel locator, which is another embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. Ulnar bone tunnel locator; 100. Guide body; 200. Positioning body; 300. Locking device; 110. Handle; 120. First guide block; 130. Second guide block; 121. First guide hole; 131. Second guide hole; 210. Slide rod; 220. Positioning hook; 221. Through hole; 140. Hook ring; 400. Guide rod; 410. Convex tooth; 420. Handle; 430. Guide hole; 500. Guide pin; 510. Barb; 610. Inner core; 620. Positioning pin; 611. Centering hole. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0030] like Figure 1 As shown, an ulnar bone tunnel locator 10 includes a guide body 100, a positioning body 200, and a locking fastener 300. The guide body 100 includes a grip rod 110, a first guide block 120, and a second guide block 130. The first guide block 120 is disposed at one end of the grip rod 110 and has a first guide hole 121. The second guide block 130 is disposed in the middle of the grip rod 110 and has a second guide hole 131. The positioning body 200 includes a slide rod 210 and a positioning hook 220. The positioning hook 220 is disposed at one end of the slide rod 210. The slide rod 210 passes through the first guide hole 121 so that the end of the positioning hook 220 away from the slide rod 210 is located on the extension line of the axis of the second guide hole 131. The locking fastener 300 is screwed to the end of the grip rod 110 near the first guide hole 121 and is used to abut the slide rod 210.

[0031] It should be noted that the grip 110 is the handheld part of the entire ulnar bone tunnel locator 10, providing the operator with a point of leverage for gripping and operation, facilitating manipulation of the locator during surgery. The first guide block 120 is located at one end of the grip 110, and its first guide hole 121 serves as a guide. It provides a sliding channel for the slide rod 210 of the positioning body 200, allowing the slide rod 210 to move along the axial direction of the first guide hole 121, ensuring the stability and accuracy of the slide rod 210's movement. The second guide block 130 is located in the middle of the grip 110, and its second guide hole 131 serves as a guide hole for subsequent bone tunnel drilling operations. During surgery, the drill bit can drill through the second guide hole 131 to form the required bone tunnel on the ulna. The slide rod 210 passes through the first guide hole 121 and can slide within it. The position of the positioning hook 220 can be adjusted by sliding the slide rod 210 to adapt to the ulnar anatomy and surgical needs of different patients. The positioning hook 220 is located at one end of the slide rod 210, and its end away from the slide rod 210 is located on the extension line of the axis of the second guide hole 131. During surgery, the positioning hook 220 is used to hook specific anatomical landmarks on the ulna to determine the starting position of the bone tunnel and ensure the accuracy of subsequent drilling operations. The locking fastener 300 is screwed to the end of the gripping rod 110 near the first guide hole 121. After adjusting the position of the positioning hook 220 by sliding the slide rod 210, the locking fastener 300 is rotated to abut against the slide rod 210, thereby fixing the slide rod 210 in the current position and preventing it from moving during surgery, ensuring the stability of the positioning. In this way, the slide rod 210 can slide within the first guide hole 121, and the position of the positioning hook 220 can be flexibly adjusted according to the ulnar anatomy of different patients, improving the accuracy of positioning and adapting to individual differences. The positioning hook 220 can accurately hook specific anatomical landmarks on the ulna, and its position corresponds to the axial extension line of the second guide hole 131. In this way, during subsequent drilling, the drill bit can accurately drill a bone tunnel on the ulna along the direction of the second guide hole 131, which greatly improves the accuracy of bone tunnel positioning and reduces surgical errors caused by inaccurate positioning.

[0032] like Figure 2 As shown, in one embodiment, a through hole 221 is provided on the end of the positioning hook 220 away from the slide bar 210, and the through hole 221 is coaxially arranged with the second guide hole 131.

[0033] It should be noted that in this embodiment, a through hole 221 is formed at the end of the positioning hook 220 away from the slide bar 210, and the through hole 221 is coaxially arranged with the second guide hole 131. This means that the axis extending from the center line of the second guide hole 131 will coincide with the axis line of the through hole 221. During surgical operation, when the positioning hook 220 hooks onto a specific anatomical landmark on the ulna, this coaxial arrangement provides a precise guiding path for subsequent drilling operations.

[0034] In one embodiment, the thickness of the end of the positioning hook 220 away from the slide bar 210 is 1mm to 2mm.

[0035] Thus, the positioning hook 220 is used to hook onto specific anatomical landmarks on the ulna. Its 1mm-2mm thickness allows it to precisely conform to the fine structures of the ulna's surface. The thinner structure allows the positioning hook 220 to penetrate deeper into narrow anatomical spaces, accurately capturing the target location point. This provides a more precise starting point for subsequent bone tunnel positioning, contributing to improved accuracy in overall bone tunnel localization. Furthermore, the thinner positioning hook 220 generates relatively weak cutting and compressive forces when passing through tissue, reducing tissue tearing and damage.

[0036] like Figure 1 As shown, in one embodiment, a hook 140 is provided on the end of the grip 110 away from the slide bar 210.

[0037] It should be noted that by applying external force through the hook 140, medical staff can easily adjust the angle of the positioning hook 220 to adapt to different surgical needs and the patient's anatomical structure. This is especially important in some complex surgical procedures, as it allows the positioning hook 220 to better conform to the ulna, providing more precise guidance for subsequent bone tunnel drilling.

[0038] like Figure 1 As shown, in one embodiment, the ulnar bone tunnel locator 10 further includes a guide rod 400, which is adapted to pass through the second guide hole 131. The end of the guide rod 400 near the positioning hook 220 is used to abut against the lateral wall of the ulna.

[0039] It should be noted that, firstly, the sliding rod 210 is adjusted so that the positioning hook 220 hooks onto a specific anatomical landmark on the ulna. Then, the guide rod 400 is inserted into the second guide hole 131, with one end of the guide rod 400 near the positioning hook 220 abutting against the lateral wall of the ulna. Since the through hole 221 and the second guide hole 131 are coaxially aligned, the guide rod 400 contacts the lateral wall of the ulna along this precise axial direction, providing an accurate guiding reference for subsequent operations. The guide rod 400's insertion through the second guide hole 131 and its contact with the lateral wall of the ulna further enhances the accuracy of positioning. The second guide hole 131 itself provides initial directional guidance for the guide rod 400, while the guide rod 400's direct contact with the lateral wall of the ulna allows for more precise determination of the starting position and direction of the bone tunnel. Compared to positioning methods relying solely on the second guide hole 131 and the positioning hook 220, this dual-guiding mechanism significantly reduces positioning errors. During the process of the guide rod 400 contacting the lateral wall of the ulna, medical staff can perceive the surface morphology and position of the ulna in real time based on feel and actual contact, and make timely fine adjustments to the position and angle to ensure the accuracy of bone tunnel positioning. Moreover, the use of the guide rod 400 makes bone tunnel positioning and drilling operations more intuitive and convenient. Medical staff can directly drill along the direction of the guide rod 400 without repeatedly adjusting the direction during drilling, saving surgical time and improving surgical efficiency.

[0040] like Figure 2 As shown, in one embodiment, the guide rod 400 has a plurality of spaced protrusions 410 on one end near the positioning hook 220.

[0041] It should be noted that when the guide rod 400 abuts against the lateral wall of the ulna, the protruding teeth 410 increase the friction between the guide rod 400 and the ulnar surface. Compared to a smooth end, the end with protruding teeth 410 can better "grip" the ulnar surface, preventing the guide rod 400 from sliding or shifting during surgical procedures. This allows the guide rod 400 to remain more stably in its predetermined position, providing reliable guidance for subsequent bone tunnel creation and ensuring that the positioning accuracy of the bone tunnel is not affected by changes in the position of the guide rod 400. Furthermore, the lateral wall surface of the ulna is not completely smooth and may have some undulations and irregular shapes. The protruding teeth 410 can better adapt to this uneven bone surface, making the contact between the guide rod 400 and the bone surface tighter and more fitted. By creating multiple protruding teeth 410, the probability of the guide rod 400 "engaging" with the ulnar surface is increased.

[0042] like Figure 1 As shown, in one embodiment, a handle 420 is provided on the end of the guide rod 400 away from the tooth 410.

[0043] Thus, the handle 420 provides a convenient gripping point for medical staff. During the insertion of the guide rod 400 through the second guide hole 131 and with its end abutting against the lateral wall of the ulna, the surgeon can easily grasp the handle 420 to control the movement and insertion of the guide rod, improving operational convenience. It also prevents the surgeon's hands from straying from the surgical area, reducing direct contact between the hand and the ulna and surrounding tissues, and lowering the risk of contaminants entering the wound. Furthermore, the handle 420 allows for quick insertion of the guide rod 400 into the second guide hole 131 and adjustment to a suitable position, enabling rapid positioning.

[0044] like Figure 1 As shown, in one embodiment, a guide hole 430 is provided at the axis of the guide rod 400. Thus, various instruments can be used with it through the guide hole 430.

[0045] like Figure 3 As shown, in one embodiment, the ulnar bone tunnel locator 10 further includes a guide pin 500, which is adapted to pass through the guide hole 430, and a barb 510 is provided on one end of the guide pin 500 near the positioning hook 220.

[0046] It should be noted that the guide pin 500 is fitted into the guide hole 430, which provides a precise guiding path for the guide pin 500. Since the guide rod 400 has already determined the approximate direction and location of the bone tunnel by abutting against the lateral wall of the ulna, when the guide pin 500 is inserted along the guide hole 430, it can further precisely guide subsequent instruments (such as drills) into the bone tissue, ensuring that the opening position and direction of the bone tunnel are highly consistent with the preoperative plan, effectively reducing positioning errors. Furthermore, the barbs on the guide pin 500 can be used to quickly guide the surgical suture through the bone tunnel.

[0047] like Figure 4 As shown, in one embodiment, the ulnar bone tunnel locator 10 further includes an inner core 610 and a positioning pin 620. The inner core 610 is adapted to pass through the guide hole 430. A centering hole 611 is opened on the axis of the inner core 610. The positioning pin 620 is adapted to pass through the centering hole 611. The end of the positioning pin 620 near the positioning hook 220 is used to pierce the lateral wall of the ulna.

[0048] It should be noted that, in one embodiment, the end of the positioning pin 620 is spiked. Thus, the inner core 610 guides the positioning pin 620, allowing the spike to form a depression on the lateral wall of the ulna for pre-positioning. After the inner core 610 and the positioning pin 620 are withdrawn from the guide hole 430, a drill bit is used to drill through the guide hole 430, centering on the depression formed by the positioning pin 620 on the ulna. This improves the drilling accuracy of the bone passage and achieves precise bone passage positioning.

[0049] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this utility model can be understood to include, but is not limited to, locking and fixing with screws / bolts, and welding. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An ulnar tunnel positioner, comprising: include: The guide body includes a grip, a first guide block, and a second guide block. The first guide block is disposed at one end of the grip and has a first guide hole. The second guide block is disposed in the middle of the grip and has a second guide hole. A positioning body, comprising a slide rod and a positioning hook, wherein the positioning hook is disposed at one end of the slide rod, and the slide rod passes through a first guide hole, such that the end of the positioning hook away from the slide rod is located on the extension line of the axis of the second guide hole; and A locking device is screwed onto one end of the grip rod near the first guide hole, and the locking device is used to abut against the slide rod.

2. The ulnar tunnel positioner of claim 1, wherein, The positioning hook has a through hole at the end away from the slide rod, and the through hole is coaxially arranged with the second guide hole.

3. The ulnar tunnel positioner of claim 2, wherein, The thickness of the end of the positioning hook away from the slide bar is 1mm to 2mm.

4. The ulnar tunnel positioner of claim 3, wherein, A hook is provided on the end of the grip rod away from the slide rod.

5. The ulnar tunnel positioner of claim 1, wherein, The ulnar bone tunnel locator also includes a guide rod, which is adapted to pass through the second guide hole, and the end of the guide rod near the positioning hook is used to abut against the lateral wall of the ulna.

6. The ulnar tunnel positioner of claim 5, wherein, The guide rod has several spaced-apart protrusions on one end near the positioning hook.

7. The ulnar tunnel positioner of claim 6, wherein, A handle is provided on the end of the guide rod away from the protruding tooth.

8. The ulnar tunnel positioner of claim 5 or 7, wherein, The guide rod has a guide hole at its axis.

9. The ulnar tunnel positioner of claim 8, wherein, The ulnar bone tunnel locator also includes a guide pin, which is adapted to pass through the guide hole, and a barb is provided on one end of the guide pin near the positioning hook.

10. The ulnar tunnel positioner of claim 8, wherein, The ulnar bone tunnel locator also includes an inner core and a positioning pin. The inner core is adapted to pass through the guide hole, and a centering hole is opened in the axis of the inner core. The positioning pin is adapted to pass through the centering hole, and the end of the positioning pin near the positioning hook is used to pierce the lateral wall of the ulna.

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