Guiding device suitable for minimally invasive joint surgery

Abstract

The utility model discloses a guiding device suitable for minimally invasive joint surgery, which belongs to the field of medical instruments and comprises a guiding rod, a holding rod and a limit ring, threads are carved on the outer surface of one side of the guiding rod close to the limit ring, the limit ring is in threaded connection with the guiding rod, and the holding rod is connected with the guide rod. According to the scheme, a medical worker can rotate the holding rod and pull the limiting block at the same time to extend the whole device, so that the distance between the wire grabbing hook and the shifting block is enlarged, the wire grabbing hook and the shifting block are separated from each other, and the wire grabbing hook and the shifting block are separated from each other, so that the wire grabbing hook and the shifting block are separated from each other. Therefore, the length of the device can be adjusted according to personal preference and familiarity, the adjusting mode is simple, the device can better conform to personal operation habits of medical staff, operability and controllability of an operation are improved, the operation of the medical staff is more flexible, and accuracy and efficiency of the operation can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and more specifically, to a guiding device suitable for minimally invasive arthroscopic surgery. Background Art

[0002] An arthroscope is a common guiding device for minimally invasive arthroscopic surgery. When a doctor performs arthroscopic surgery, the conventional operation requires one hand to hold the arthroscope lens and the other hand to perform the operation. The most common operation under the arthroscope is to grasp and guide the wire between different accesses.

[0003] Chinese Patent Authorization Publication No.: CN213850924U provides a wire grasping and guiding device under arthroscope. The hook head structure of this solution is smaller, requires less operating space, has a more minimally invasive surgical access, and causes less damage to surrounding tissues. Compared with the commonly used wire grasping forceps, the hook head curvature can be larger, and it is not easy to slip during the wire grasping and guiding process. The doctor can operate in a pen-holding or pencil-holding posture, and the fingers do not need to use the scissor-like operation, which is significantly more labor-saving, not easy to fatigue, and has a higher surgical accuracy.

[0004] The length of the wire grasping device in this solution is fixed and cannot be adjusted. However, different doctors may have different surgical preferences and usage habits. Doctors cannot adjust the length of the device according to their own preferences and familiarity, resulting in inflexible use, which may reduce the accuracy and efficiency of the surgery. Therefore, in view of the above problems, a guiding device suitable for minimally invasive arthroscopic surgery is proposed. Summary of the Utility Model

[0005] 1. Technical Problems to be Solved

[0006] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a guiding device suitable for minimally invasive arthroscopic surgery. In this solution, medical staff can extend the whole device by rotating the grip rod and simultaneously pulling the limit block, so that the distance between the wire grasping hook and the dial block is enlarged. Thus, the length of the device can be adjusted according to their own preferences and familiarity. Its adjustment method is simple, which can make the device more in line with the personal operation habits of medical staff, improve the operability and controllability of the surgery, make the surgical operation of medical staff more flexible, and can effectively improve the accuracy and efficiency of the surgery.

[0007] 2. Technical Solutions

[0008] To solve the above problems, the utility model adopts the following technical solutions.

[0009] A guiding device suitable for minimally invasive joint surgery, comprising a guiding rod, a grip rod and a limiting ring. The outer surface of the guiding rod near the limiting ring is engraved with threads. The limiting ring is threadedly connected to the guiding rod. The grip rod is sleeved on the outer end of the guiding rod and is slidably connected to the guiding rod. The limiting ring is rotatably connected to the grip rod. A hook assembly is provided at one end of the guiding rod away from the grip rod. An extension assembly is provided in the inner cavity of the grip rod. The hook assembly includes a wire-grabbing hook and a swing arm. The wire-grabbing hook is fixedly connected to the guiding rod. The swing arm is rotatably connected to the guiding rod. The extension assembly includes a limiting cylinder and an extension rod. The extension rod is slidably connected to the inner cavity of the limiting cylinder.

[0010] Further, the hook assembly further includes a traction wire. The traction wire is disposed in the inner cavity of the guiding rod. An L-shaped hole is formed in the wire-grabbing hook. The traction wire penetrates through the side wall of the guiding rod and extends into the L-shaped hole.

[0011] Further, one end of the traction wire away from the grip rod extends out of the L-shaped hole and is connected to the swing arm. A first spring is fixedly connected to the inner end of the swing arm. One end of the first spring away from the swing arm is fixedly connected to the wire-grabbing hook.

[0012] Further, a dial block is fixedly connected to the outer end of the limiting cylinder. A limiting hole matching the dial block is formed in the outer end of the grip rod. A second spring is disposed on one side of the limiting cylinder away from the guiding rod. Both ends of the second spring are fixedly connected to the limiting cylinder and the inner wall of the grip rod respectively.

[0013] Further, one end of the extension rod extends into the inner cavity of the guiding rod and is slidably connected to the inner wall of the guiding rod. One end of the traction wire is connected to the extension rod.

[0014] Further, a limiting block is slidably connected to one end of the dial block. The bottom end of the limiting block penetrates through the side wall of the limiting cylinder and abuts against the extension rod. A third spring is disposed above the limiting block. Both ends of the third spring are fixedly connected to the dial block and the limiting block respectively.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] In this solution, medical staff can extend the whole device by rotating the grip rod and simultaneously pulling the limiting block, so that the distance between the wire-grabbing hook and the dial block is enlarged. Thus, the length of the device can be adjusted according to their own preferences and familiarity. Its adjustment method is simple, which can make the device more in line with the personal operation habits of medical staff, improve the operability and controllability of the operation, make the operation of medical staff more flexible, and can effectively improve the accuracy and efficiency of the operation. Description of the drawings

[0018] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 Schematic diagram of the structure of the grab hook assembly of the present utility model;

[0020] Figure 3 Schematic diagram of the partial explosion structure of the present utility model;

[0021] Figure 4 Schematic diagram of the internal structure of the guiding rod and the holding rod of the present utility model;

[0022] Figure 5 Schematic diagram of the structure of the extension assembly of the present utility model.

[0023] Explanation of the reference numerals in the figure:

[0024] 1. Guiding rod;

[0025] 2. Holding rod;

[0026] 3. Limiting ring;

[0027] 4. Grab hook assembly; 401. Grab wire hook; 402. Swing arm; 403. First spring; 404. Traction wire;

[0028] 5. Extension assembly; 501. Limiting cylinder; 502. Dial block; 503. Second spring; 504. Extension rod; 505. Limiting block; 506. Third spring. Specific implementation manner

[0029] 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 in 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.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Embodiment:

[0033] Please refer to Figure 1 、 2 Figures 3 and 4, a guiding device suitable for minimally invasive joint surgery, comprising a guiding rod 1, a grip rod 2 and a limiting ring 3. The outer surface of the guiding rod 1 near the limiting ring 3 is engraved with threads, and the limiting ring 3 is threadedly connected to the guiding rod 1. The grip rod 2 is sleeved on the outer end of the guiding rod 1, and the grip rod 2 is slidably connected to the guiding rod 1. The limiting ring 3 is rotatably connected to the grip rod 2. A hook assembly 4 is provided at one end of the guiding rod 1 away from the grip rod 2. An extension assembly 5 is provided in the inner cavity of the grip rod 2. The hook assembly 4 includes a wire-grabbing hook 401 and a swing arm 402. The wire-grabbing hook 401 is fixedly connected to the guiding rod 1, and the swing arm 402 is rotatably connected to the guiding rod 1. The extension assembly 5 includes a limiting cylinder 501 and an extension rod 504. The extension rod 504 is slidably connected to the inner cavity of the limiting cylinder 501. The hook assembly 4 further includes a traction wire 404. The traction wire 404 is arranged in the inner cavity of the guiding rod 1. An L-shaped hole is formed in the wire-grabbing hook 401. The traction wire 404 penetrates through the side wall of the guiding rod 1 and extends into the L-shaped hole. One end of the traction wire 404 away from the grip rod 2 extends out of the L-shaped hole and is connected to the swing arm 402. A first spring 403 is fixedly connected to the inner end of the swing arm 402. One end of the first spring 403 away from the swing arm 402 is fixedly connected to the wire-grabbing hook 401.

[0034] An arthroscope is a common guiding device for minimally invasive arthroscopic surgery. When performing arthroscopic surgery, doctors usually need to hold the arthroscope lens with one hand and control the wire grasping device with the other hand. Different doctors have different surgical preferences and usage habits. Doctors can adjust the length of the device according to their preferences and familiarity to make the operation more flexible, effectively improving the accuracy and efficiency of the surgery. In this solution, the medical staff holds the handle 2 and inserts the guiding rod 1 into the patient's wound. Under the elastic support of the first spring 403, the swing arm 402 and the wire grasping hook 401 are in a closed state. When the medical staff needs to grasp the wire, they pull the slider 502 backward, causing the slider 502 to move in the limiting hole. Then, the slider 502 drives the limiting cylinder 501 and the extension rod 504 to move, squeezing the second spring 503 by the limiting cylinder 501, and pulling the traction wire 404 through the extension rod 504. The traction wire 404 is in a taut state. By pulling the traction wire 404, the swing arm 402 can be rotated, opening the space between the swing arm 402 and the wire grasping hook 401, and simultaneously squeezing the first spring 403. At this time, the medical staff can hook the wire into the wire grasping hook 401. Then, release the slider 502. Under the elastic action of the second spring 503 and the first spring 403, the swing arm 402 resets, holding the wire in the wire grasping hook 401. Then, the medical staff can conduct wire guiding.

[0035] Please refer to Figures 3 - 5 The outer end of the limiting cylinder 501 is fixedly connected with a slider 502. The outer end of the handle 2 is provided with a limiting hole matching the slider 502. A second spring 503 is arranged on the side of the limiting cylinder 501 away from the guiding rod 1. The two ends of the second spring 503 are respectively fixedly connected with the limiting cylinder 501 and the inner wall of the handle 2. One end of the extension rod 504 extends into the inner cavity of the guiding rod 1, and the extension rod 504 is slidably connected with the inner wall of the guiding rod 1. One end of the traction wire 404 is connected with the extension rod 504. One end of the slider 502 is slidably connected with a limiting block 505. The bottom end of the limiting block 505 penetrates the side wall of the limiting cylinder 501 and abuts against the extension rod 504. A third spring 506 is arranged above the limiting block 505. The two ends of the third spring 506 are respectively fixedly connected with the slider 502 and the limiting block 505.

[0036] In this solution, the length of the device can be adjusted. Medical staff can rotate the limit ring 3 so that the limit ring 3 rotates at the threaded part on the surface of the guide rod 1. By pushing the grip rod 2 towards the end of the device through the limit ring 3, since the grip rod 2 is slidably connected to the guide rod 1, the grip rod 2 will not rotate. Since the movement of the grip rod 2 will drive the limit cylinder 501 and the extension rod 504 to move, in order to prevent the extension rod 504 from pulling the traction wire 404, when the medical staff rotates the limit ring 3, they can pull up the limit block 505 at the same time, so that the limit block 505 disengages from the surface of the extension rod 504 and squeezes the third spring 506. It should be noted that in this solution, there are multiple slots on the surface of the extension rod 504 that match the limit block 505. It is precisely under the supporting action of the third spring 506 that the limit block 505 is engaged with the slot, which causes the extension rod 504 to be unable to slide in the inner cavity of the limit cylinder 501. After the medical staff pulls up the limit block 505, and at the same time coordinates with the rotation of the limit ring 3, they can drive the grip rod 2 and the limit cylinder 501 to move backward together, while keeping the extension rod 504 in place, so that the traction wire 404 will not be pulled. When the grip rod 2 moves a certain distance, the medical staff releases the limit block 505, and the limit block 505 is engaged with the slot on the second spring 503 again under the elastic force of the third spring 506, thus fixing the extension rod 504 on the inner wall of the limit cylinder 501 again. At this time, when the medical staff pulls the dial block 502 again, they can drive the limit cylinder 501 and the extension rod 504 to move synchronously again, thereby controlling the opening and closing of the wire-grabbing hook 401 and the swing arm 402. At the same time, the overall device is extended, and the distance between the wire-grabbing hook 401 and the dial block 502 is enlarged. The medical staff can thus adjust the length of the device according to their own preferences and familiarity.

[0037] Working principle:

[0038] Before use, medical staff first adjust the length of the device according to their own preferences and familiarity. The adjustment method is as follows: Rotate the limit ring 3 so that the limit ring 3 rotates at the threaded part on the surface of the guiding rod 1. Push the grip rod 2 towards the end of the device through the limit ring 3. While rotating the limit ring 3, pull the limit block 505 upwards, so that the limit block 505 disengages from the surface of the extension rod 504 and squeezes the third spring 506. At the same time, in cooperation with the rotation of the limit ring 3, the grip rod 2 and the limit cylinder 501 can be driven to move backward, while the extension rod 504 stays in place, so that the traction wire 404 will not be pulled. When the grip rod 2 moves a certain distance, the medical staff releases the limit block 505. The limit block 505 is clamped with the card slot on the second spring 503 again under the elastic force of the third spring 506, so as to fix the extension rod 504 on the inner wall of the limit cylinder 501 again. Thus, the adjustment of the overall length of the device is completed. Next, the medical staff can carry out the work of grasping the wire and guiding the wire. The medical staff holds the part of the grip rod 2 and inserts the guiding rod 1 into the patient's wound. Under the elastic support of the first spring 403, the swing arm 402 and the wire grasping hook 401 are in a closed state. When the medical staff needs to grasp the wire, pull the slider 502 backward, so that the slider 502 moves in the limit hole. Then, drive the limit cylinder 501 and the extension rod 504 to move through the slider 502, so that the limit cylinder 501 squeezes the second spring 503, and pulls the traction wire 404 through the extension rod 504. The swing arm 402 can be pulled to rotate through the traction wire 404, so that the swing arm 402 and the wire grasping hook 401 are opened, and at the same time, the first spring 403 is squeezed. At this time, the medical staff hooks the wire into the wire grasping hook 401, and then releases the slider 502. Under the elastic action of the second spring 503 and the first spring 403, the swing arm 402 is reset, and the wire is wound in the wire grasping hook 401. Then, the medical staff can guide the wire.

[0039] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A guiding device suitable for minimally invasive joint surgery, comprising a guiding rod (1), a gripping rod (2) and a limiting ring (3), characterized in that: The outer surface of the guide rod (1) near the limiting ring (3) is engraved with a thread, the limiting ring (3) is threadedly connected to the guide rod (1), the gripping rod (2) is sleeved on the outer end of the guide rod (1), and the gripping rod (2) is slidably connected to the guide rod (1), the limiting ring (3) is rotatably connected to the gripping rod (2), the end of the guide rod (1) away from the gripping rod (2) is provided with a grabbing hook assembly (4), and the inner cavity of the gripping rod (2) is provided with an extension assembly (5); The hook assembly (4) comprises a wire grabbing hook (401) and a swing arm (402), wherein the wire grabbing hook (401) is fixedly connected to the guide rod (1), and the swing arm (402) is rotatably connected to the guide rod (1); The extension assembly (5) comprises a limiting cylinder (501) and an extension rod (504), and the extension rod (504) is slidably connected to the inner cavity of the limiting cylinder (501).

2. A guiding device suitable for minimally invasive joint surgery according to claim 1, characterized in that: The grab hook assembly (4) further comprises a traction wire (404), wherein the traction wire (404) is arranged in the inner cavity of the guide rod (1), an L-shaped hole is provided on the traction hook (401), and the traction wire (404) passes through the side wall of the guide rod (1) and extends into the L-shaped hole.

3. A guiding device suitable for minimally invasive joint surgery according to claim 2, characterized in that: An L-shaped hole extends from one end of the traction wire (404) away from the gripping rod (2) and is connected to the swing arm (402); a first spring (403) is fixedly connected to the inner end of the swing arm (402); and an end of the first spring (403) away from the swing arm (402) is fixedly connected to the wire grabbing hook (401).

4. The guiding device for minimally invasive joint surgery according to claim 1, characterized in that: The outer end of the limiting cylinder (501) is fixedly connected to a shifting block (502), the outer end of the gripping rod (2) is provided with a limiting hole matching the shifting block (502), and a second spring (503) is arranged on the side of the limiting cylinder (501) away from the guide rod (1), and the two ends of the second spring (503) are respectively fixedly connected to the inner walls of the limiting cylinder (501) and the gripping rod (2).

5. The guiding device suitable for minimally invasive joint surgery according to claim 2, characterized in that: One end of the extension rod (504) extends to the inner cavity of the guide rod (1), and the extension rod (504) is slidably connected to the inner wall of the guide rod (1), and one end of the traction wire (404) is connected to the extension rod (504).

6. The guiding device for minimally invasive joint surgery according to claim 4, characterized in that: One end of the shift block (502) is slidably connected to the limiting block (505), the bottom end of the limiting block (505) passes through the side wall of the limiting cylinder (501) and abuts against the extension rod (504), and a third spring (506) is arranged on the upper side of the limiting block (505), and the two ends of the third spring (506) are respectively fixedly connected to the shift block (502) and the limiting block (505).

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