Suturing tool for meniscus

Abstract

The utility model belongs to the field of medical instruments, and particularly relates to a meniscus suturing tool. The device comprises a handle with a cavity and a needle tube, the upper end of the needle tube is installed at the bottom of the handle, a needle head is arranged in the lower end of the needle tube, the upper end of the needle head is in threaded fit with the inner wall of the needle tube, two bent and elastic cylindrical rods are arranged in the needle head, and a ductile blocking ring which is not connected end to end is arranged between the two cylindrical rods. A sliding block is arranged in a cavity of the handle, a pushing rod with one end fixed to the sliding block is arranged below the sliding block, the other end of the pushing rod is located in the needle head, a check block used for preventing the blocking ring from sliding out and not hindering the cylindrical rod from sliding out is fixed to a needle hole in the lower end of the needle head, and the diameter of the pushing rod is smaller than the inner diameter of the expanded blocking ring. A driving mechanism is mounted on the outer side of the handle. Two cylindrical rods can be independently implanted at a time through the blocking ring, the needle does not need to be taken out, the cylindrical rods do not need to be placed for the second time, and therefore the efficiency of meniscus suture is improved.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, in particular to a meniscus suturing tool. Background Art

[0002] The meniscus is located between the femur (thigh bone) and the tibia (shin bone). It is called the meniscus because of its shape that resembles a crescent. The meniscus is very important to the human body. It is similar to the "gasket" in a machine bearing. It not only increases the stability and compatibility of the knee joint, but also bears the basic load between the femur and tibia, and has the functions of buffering, shock absorption and lubricating the knee joint.

[0003] Meniscus injury is a common sports injury in sports. Traditional methods mostly use resection, but after meniscus resection, problems such as joint instability and concurrent osteoarthritis will occur. In recent years, people have begun to study and improve the treatment of meniscus injury. At present, the most ideal treatment method is to suture the rupture to make it heal. During suturing, the main method is to use a suturer to sequentially send two baffles or cylindrical rods into one side of the meniscus, and then tighten the suture to bring the torn part together. However, when using the existing suturer, it is necessary to take out the suturer, re-place the second baffle or cylindrical rod, and reposition the needle, which will reduce the efficiency of suturing. At the same time, the baffle or cylindrical rod may not be completely separated from the suturer. In this way, when the needle is withdrawn, the baffle or cylindrical rod will move with the suturer and part of it will be stuck on the meniscus. Utility Model Content

[0004] The utility model aims to provide a meniscus suturing tool, which can implant two cylindrical rods independently at one time and improve the suturing efficiency.

[0005] The meniscus suturing tool comprises a handle with a cavity and a vertically arranged needle tube, the upper end of the needle tube is detachably mounted on the bottom of the handle, a needle is arranged in the lower end of the needle tube, the upper end of the needle is threadedly matched with the inner wall of the needle tube, two curved and elastic cylindrical rods are arranged in the needle head, a ductile barrier ring which is not connected end to end is arranged between the two cylindrical rods, a slider which slides up and down with the handle is arranged in the cavity of the handle, a push rod with one end fixed to the slider is vertically arranged below the slider, the other end of the push rod is located in the needle head, a block for preventing the barrier ring from sliding out and not hindering the cylindrical rod from sliding out is fixed at the needle hole at the lower end of the needle head, the diameter of the push rod is smaller than the inner diameter of the barrier ring after expansion, and a driving mechanism for driving the slider to move up and down is installed on the outside of the handle.

[0006] Furthermore, a threaded hole is provided at the bottom of the handle, and the upper end of the needle tube is located in the threaded hole and threadably matched therewith.

[0007] Furthermore, the driving mechanism includes a toggle block arranged on the outside of the handle, a slide groove communicating inside and outside is opened on the side wall of the handle, a connecting block is arranged in the slide groove, one end of the connecting block is fixed on the slider, and the other end is fixed on the toggle block.

[0008] Furthermore, a plurality of balls for limiting position and reducing friction are sequentially installed on the inner side wall of the handle from top to bottom.

[0009] Furthermore, an external thread is provided at the upper end of the needle, an internal thread threadably matched with the external thread is provided on the inner side wall of one section of the needle tube, and an observation window communicating with the inside and outside is provided on the outer side wall of the section.

[0010] Furthermore, a section of the needle tube where the observation window is provided is provided with scale lines.

[0011] Furthermore, the toggle block is provided with anti-slip grooves.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model bends a cylindrical rod with certain elasticity into a "U" shape and puts it into the needle head. Then, when one end of the cylindrical rod is separated from the needle head, the cylindrical rod as a whole quickly returns to its original shape under the action of elastic force, thereby completely separating from the needle head, avoiding that the cylindrical rod follows the movement of the needle head and a part of it is stuck in the meniscus when the needle is withdrawn. The barrier ring can also effectively prevent the two cylindrical rods from being pushed out of the needle head at the same time. At the same time, under the action of the stopper, the upper cylindrical rod must enter the barrier ring and expand the barrier ring if it wants to be pushed out of the needle head. This method needs to overcome a certain resistance. Therefore, when the push rod is used to push the two cylindrical rods and the barrier ring to move as a whole and the resistance suddenly increases, the barrier ring contacts the stopper and the lower cylindrical rod is also completely separated from the needle head. At this time, it is only necessary to withdraw the needle and pass the needle through the other end of the meniscus and then forcefully push out the remaining cylindrical rod, so that the two cylindrical rods can be independently implanted at one time, without taking out the needle head and placing the cylindrical rod for a second time, thereby improving the efficiency of meniscus suturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0016] Figure 3 for Figure 1 Enlarged cross-sectional view at the middle BB;

[0017] Figure 4 for Figure 1 Left view of

[0018] The names of the components in the figure are: 1. slider; 2. ball bearing; 3. handle; 4. push rod; 5. needle; 6. needle tube; 7. barrier ring; 8. stopper; 9. cylindrical rod; 10. toggle block; 11. scale line. DETAILED DESCRIPTION

[0019] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0020] Example 1

[0021] The meniscus suturing tool described in this embodiment includes a handle 3 with a cavity and a vertically arranged needle tube 6, the upper end of the needle tube 6 is detachably mounted on the bottom of the handle 3, and the needle tube 6 and the handle 3 are detachably connected to facilitate subsequent cleaning and disinfection of the handle 3 and the needle tube 6. Figure 1 and Figure 4 As shown, a threaded hole is provided at the bottom of the handle 3, and the upper end of the needle tube 6 is located in the threaded hole and threadedly matched therewith, that is, the needle tube 6 can be quickly installed or removed by screwing the upper end of the needle tube 6 into or out of the threaded groove;

[0022] like Figure 1 and Figure 4 As shown, a needle 5 is arranged in the lower end of the needle tube 6, and the upper end of the needle 5 is threadedly matched with the inner wall of the needle tube 6, wherein the needle tip of the needle 5 faces downward and is exposed below the needle tube 6, and an external thread is provided at the upper end of the needle 5, and an internal thread threadedly matched with the external thread is provided on the inner side wall of one section of the needle tube 6, and an observation window communicating with the inside and outside is provided on the outer side wall of the section, and the distance of the needle 5 exposed from the needle tube 6 can be adjusted by rotating the needle 5, thereby changing the maximum length of the needle 5 puncturing the meniscus, and at the same time, the position of the needle 5 can be fixed;

[0023] like Figure 4 As shown, a section of the needle tube 6 having an observation window is provided with a scale line 11, and through the cooperation of the observation window and the scale line 11, the length of the needle 5 can be quantified, so as to facilitate adjustment by medical personnel;

[0024] Two curved and elastic cylindrical rods 9 are arranged inside the needle 5. Figure 1 , Figure 2 and Figure 3As shown, when the cylindrical rod 9 with a certain elasticity is pressed into the needle 5 of the circular structure, due to the restriction of the inner wall of the needle 5 on the cylindrical rod 9, the cylindrical rod 9 will naturally be bent into a "U" shape, and once one end of the cylindrical rod 9 is separated from the needle 5, the cylindrical rod 9 as a whole will quickly return to its original state under the action of the elastic force, thereby completely separating from the needle 5, thereby preventing the cylindrical rod 9 from moving with the needle 5 and partially getting stuck in the meniscus when the needle is withdrawn; wherein the cylindrical rod 9 is a prior art, which is processed from biocomposite materials such as PLGA, PLLA, and PDLLA, and the biocomposite materials are molded at 140°C-160°C to obtain sheets and rods, and a large number of fiber structures appear inside the composite materials, and these fiber structures significantly improve the mechanical properties of the material, and the bending strength is increased by 100%-150%, and the tensile strength of the rod will also be significantly improved with the molding; in actual application, the two cylindrical rods 9 are connected by sutures (not shown in the figure);

[0025] A ductile barrier ring 7 which is not connected at the head and tail is arranged between the two cylindrical rods 9. The barrier ring 7 is made of a ductile material such as an iron sheet and is bent into a ring structure. When an object is pressed into the barrier ring 7, the barrier ring 7 will be forced to expand outward naturally so that the object entering the barrier ring 7 can pass through, such as wearing a ring-shaped gold or silver bracelet which is not connected at the head and tail;

[0026] A slider 1 is provided in the cavity of the handle 3 to slide up and down with the handle 3. A push rod 4 with one end fixed thereto is vertically provided below the slider 1. The other end of the push rod 4 is located in the needle 5. By moving the slider 1, the push rod 4 pushes the barrier ring 7 and the two cylindrical rods 9 as a whole to move toward the needle hole at the lower end of the needle 5. Figure 1 As shown, a channel for the push rod 4 to pass independently is opened at the inner bottom of the handle 3, and a plurality of balls 2 for limiting and reducing friction are sequentially installed on the inner side wall of the handle 3 from top to bottom. The freely rolling balls 2 can not only limit the slider 1 to move up and down, but also reduce the force required by the medical staff to push the slider 1 to move;

[0027] A stopper 8 is fixed at the needle hole at the lower end of the needle 5 to prevent the barrier ring 7 from sliding out and not hindering the cylindrical rod 9 from sliding out. The diameter of the push rod 4 is smaller than the inner diameter of the barrier ring 7 after expansion. The barrier ring 7 can effectively prevent the two cylindrical rods 9 from being pushed out of the needle 5 at the same time. At the same time, under the action of the stopper 8, the upper cylindrical rod 9 must enter the barrier ring 7 and expand the barrier ring 7 if it wants to be pushed out of the needle 5. This method requires overcoming a certain amount of resistance. Therefore, when the push rod 4 is used to push the two cylindrical rods 9 and the barrier ring 7 to move as a whole and the resistance suddenly increases, the barrier ring 7 contacts the stopper 8 and the lower cylindrical rod 9 is also completely separated from the needle 5. At this time, it is only necessary to withdraw the needle and pass the needle 5 through the other end of the meniscus and then forcefully push out the remaining cylindrical rod 9 to implant two cylindrical rods 9 independently at one time. There is no need to remove the needle 5 and place the cylindrical rod 9 a second time, thereby improving the efficiency of meniscus suturing.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, there are two stoppers 8, which are respectively located at the front inner wall and the rear inner wall of the needle hole at the lower end of the needle head 5, so as to ensure that after the barrier ring 7 contacts the stoppers 8, one end of the cylindrical rod 9 below must be separated from the needle head 5, and the distance between the two stoppers 8 is smaller than the unexpanded outer diameter of the barrier ring 7;

[0029] A toggle block 10 is arranged on the outside of the handle 3, and a slide groove communicating with the inside and outside is opened on the side wall of the handle 3. A connecting block is arranged in the slide groove, one end of the connecting block is fixed on the slider 1, and the other end is fixed on the toggle block 10 (the toggle block 10 and the connecting block in this paragraph constitute the driving machine for driving the slider 1 to move up and down. In actual application, a pressing block with a "T"-shaped structure can also be used). Medical personnel can easily drive the barrier ring 7 and the two cylindrical rods 9 as a whole by holding the handle 3 and driving the slider 1 to move with their thumb; Figure 1 As shown, when the connecting block contacts the upper groove wall of the slide groove, the cylindrical rod 9 below is located above or between the two stoppers 8, and when the connecting block contacts the lower groove wall of the slide groove, the bottom of the push rod 4 is located between the two stoppers 8.

[0030] When this embodiment is used, first, the No. 1 cylindrical rod 9 (the cylindrical rod 9 at the bottom in the figure), the barrier ring 7, and the No. 2 cylindrical rod 9 (the cylindrical rod 9 at the top in the figure) are placed in the push rod 4 in sequence, and then the needle 5 is screwed into the needle tube 6 at an appropriate distance, and then the push rod 4 is inserted into the needle tube 6 and the needle 5, and at the same time, the upper end of the needle tube 6 is tightened in the threaded hole, and then the needle 5 is passed through one end of the meniscus and the toggle block 10 is pushed with the thumb to move until the resistance suddenly increases, and then the needle 5 is pushed out and passed through the other end of the meniscus, and then the toggle block 10 is pushed again to move until it cannot move, and finally the needle 5 is withdrawn and the suture is tightened and cut.

[0031] Example 2

[0032] This embodiment further illustrates the technology. The toggle block 10 is provided with anti-slip grooves, such as Figure 4 As shown, the anti-slip grooves increase the friction between the thumb of the medical staff and the toggle block 10, thereby avoiding slipping.

Claims

1. A meniscus suturing tool, comprising a handle (3) with a cavity and a vertically arranged needle tube (6), characterized in that: The upper end of the needle tube (6) is detachably mounted on the bottom of the handle (3); a needle head (5) is arranged in the lower end of the needle tube (6); the upper end of the needle head (5) is threadedly matched with the inner wall of the needle tube (6); two curved and elastic cylindrical rods (9) are arranged in the needle head (5); a barrier ring (7) with ductility and not connected end to end is arranged between the two cylindrical rods (9); a slider (1) that slides up and down with the handle (3) is arranged in the cavity of the handle (3); a push rod (4) with one end fixed to the slider (1) is vertically arranged below the slider (1); the other end of the push rod (4) is located in the needle head (5); a stopper (8) for preventing the barrier ring (7) from sliding out and not hindering the cylindrical rod (9) from sliding out is fixed at the needle hole at the lower end of the needle head (5); the diameter of the push rod (4) is smaller than the inner diameter of the barrier ring (7) after expansion; and a driving mechanism for driving the slider (1) to move up and down is installed on the outer side of the handle (3).

2. The meniscus suturing tool according to claim 1, characterized in that: A threaded hole is provided at the bottom of the handle (3), and the upper end of the needle tube (6) is located in the threaded hole and threadably matched therewith.

3. The meniscus suturing tool according to claim 1, characterized in that: The driving mechanism comprises a toggle block (10) arranged outside the handle (3); a slide groove communicating inside and outside is provided on the side wall of the handle (3); a connecting block is provided in the slide groove; one end of the connecting block is fixed to the slider (1) and the other end is fixed to the toggle block (10).

4. The meniscus suturing tool according to claim 3, characterized in that: A plurality of balls (2) for limiting position and reducing friction are sequentially mounted on the inner side wall of the handle (3) from top to bottom.

5. The meniscus suturing tool according to claim 2 or 4, characterized in that: The upper end of the needle (5) is provided with an external thread, the inner side wall of one section of the needle tube (6) is provided with an internal thread that is threadably matched with the external thread, and the outer side wall of the section is provided with an observation window that communicates with the inside and outside.

6. The meniscus suturing tool according to claim 5, characterized in that: A scale mark (11) is provided on a section of the needle tube (6) where the observation window is provided.

7. The meniscus suturing tool according to claim 3, characterized in that: The toggle block (10) is provided with anti-slip grooves.

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