A surgical instrument for meniscus posterior horn fixation

Abstract

The utility model provides a kind of surgical instrument for meniscus posterior horn fixation, including handle, the handle is connected with cannulated needle, handle is equipped with push slider, push slider is connected with push thin rod, push thin rod is inserted in cannulated needle, the sharp end of cannulated needle is slidably provided with columnar head, one end of columnar head is conical, and cone tip is spherical, the other end of columnar head is connected with suture, suture is double-thread structure with tail closed, push thin rod and columnar head abut, cannulated needle is equipped with sleeve, the sharp portion of cannulated needle is exposed outside sleeve, gap is equipped between sleeve and cannulated needle, the tube wall of the needle pricking end of cannulated needle is equipped with axially arranged strip slot, suture is extended to the gap between sleeve and cannulated needle by the end of columnar head through strip slot.The utility model can be conveniently carried out meniscus posterior horn fixation operation, greatly reduce the operation difficulty, reduce operation time.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and specifically relates to a surgical instrument for fixing the posterior horn of the meniscus. Background Technology

[0002] The meniscus is mainly divided into the body, posterior horn, anterior horn, and root. When the posterior horn of the meniscus is injured, it needs to be fixed so that the posterior horn can be effectively attached to the tibial plateau. During posterior horn fixation surgery, a hole needs to be drilled in the tibial plateau. Sutures are then used to fix the posterior horn of the meniscus. The sutures are passed through the hole in the tibial plateau, and the traction of the sutures fixes the posterior horn of the meniscus to the tibial plateau. However, posterior horn fixation surgery is currently quite difficult and time-consuming, mainly due to the following reasons: The posterior horn of the meniscus is relatively narrow, resulting in limited surgical space. Currently, a suture hook is generally used to puncture the posterior horn of the meniscus and then place the suture. Because the meniscus is rigid, puncture in this confined space is difficult, and placing the suture after puncture is even more challenging, requiring multiple adjustments and a slow process. This leads to a longer surgery time and requires highly skilled surgeons. Consequently, in some cases of posterior horn injury, due to the difficulty of surgical repair, the posterior horn of the meniscus must be removed, causing permanent and irreversible damage to the patient. Utility Model Content

[0003] To overcome the shortcomings and problems of existing technologies, this utility model provides a surgical instrument for fixing the posterior horn of the meniscus, which can facilitate the posterior horn fixation surgery, greatly reduce the difficulty of the surgery, and reduce the operation time.

[0004] This utility model is achieved through the following technical solution:

[0005] A surgical instrument for fixing the posterior horn of the meniscus includes a handle connected to a hollow needle. A pusher slider is provided on the handle, and a pusher rod is connected to the pusher slider. The pusher rod is inserted into the hollow needle. A cylindrical head is slidably disposed within the spike end of the hollow needle. One end of the cylindrical head is conical, with a spherical tip. The other end of the cylindrical head is connected to a suture, which is a double-lined structure with a closed tail. The pusher rod abuts against the cylindrical head. A cannula is provided outside the hollow needle, with the spike end of the hollow needle protruding outside the cannula. A gap exists between the cannula and the hollow needle. The wall of the needle end of the hollow needle has an axially arranged strip-shaped groove. The suture extends from the end of the cylindrical head through the strip-shaped groove into the gap between the cannula and the hollow needle.

[0006] The hollow tube needle has a bent section at its pointed end, with the bend being an arc-shaped transition.

[0007] One end of the hollow tube needle is inserted into and fixed to the handle, and the outer wall of the hollow tube needle is provided with a convex ring, and the sleeve is tightly fitted with the convex ring.

[0008] The suture is made of polyetheretherketone material, and the open end of the suture after being folded into a double suture is fixed to the columnar head.

[0009] The handle has a sliding cavity, the push slider is located in the sliding cavity and slides along the sliding cavity, the cavity inside the hollow tube needle is connected to the sliding cavity, one end of the push rod is fixed to the end face of the push slider, and the push rod is inserted into the cavity inside the hollow tube needle from the sliding cavity.

[0010] The push slider has grooves on both sides, and the slide cavity has slide rails on both sides that match the grooves.

[0011] The push slider has a raised push part with anti-slip texture.

[0012] The push slider is provided with a positioning protrusion, and the cavity wall of the slide cavity is provided with two positioning holes, which match the positioning protrusion.

[0013] This invention features a columnar head connected to a suture. During surgery, a hollow tube is controlled by a handle to puncture the posterior horn of the meniscus. After puncture, a sliding block pushes a thin rod to eject the columnar head. As the columnar head is ejected, it carries the suture through the posterior horn of the meniscus. The suture can be easily removed by clamping the columnar head with suture forceps. The columnar head passes through the closed end of the suture, thus fixing the suture to the posterior horn of the meniscus. The columnar head then exits through a hole at the tibial plateau, thus fixing the posterior horn of the meniscus to the tibial plateau, greatly reducing the difficulty and time of the surgery.

[0014] The cylindrical head of this invention has a conical end and a spherical tip. This structure allows for good passage of the cylindrical head, and the spherical tip can prevent accidental injury to other parts during surgery, thus improving safety. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a partially enlarged structural schematic diagram of the present invention;

[0017] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0018] Figure 4 This is a schematic diagram of the handle structure in this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the push slider in this utility model;

[0020] Figure 6 This is a schematic diagram of the hollow tube needle in this utility model;

[0021] Figure 7 This is a schematic diagram of the connection structure between the columnar head and the suture in this utility model;

[0022] Figure 8 This is a structural diagram of the meniscus.

[0023] In the diagram: 1-handle, 11-sliding cavity, 111-positioning hole, 2-hollow tube needle, 21-bent part, 22-strip groove, 3-pushing slider, 31-sliding groove, 32-pushing part, 33-positioning protrusion, 4-pushing rod, 5-column head, 6-suture, 7-cannula, 8-convex ring, 9-meniscus, 91-posterior horn, 10-tibial plateau, 101-hole. Detailed Implementation

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, a surgical instrument for fixing the posterior horn of the meniscus includes a handle 1, to which a hollow needle 2 is connected. The hollow needle 2 may be made of alloy material and has a pointed end for puncture. The pointed end of the hollow needle 2 has a bent portion 21 with an arc-shaped transition. This bent portion 21 facilitates insertion into the posterior horn of the meniscus during surgery, and the bending angle is generally set at 160-170 degrees.

[0026] Combination Figure 4 and Figure 5 As shown, the handle 1 is equipped with a push slider 3, which is connected to a push rod 4. The push rod 4 is inserted into the hollow tube needle 2. Pushing the push slider 3 moves the push rod 4, which in turn slides within the hollow tube needle 2. The handle 1 has a sliding cavity 11, within which the push slider 3 is located and slides. The push slider 3 has grooves 31 on both sides, and slide rails 12 matching the grooves 31 on both sides of the sliding cavity 11. This structure makes the sliding of the push slider 3 smoother. The push slider 3 has a raised push part 32 with anti-slip texture. Pushing the push part 32 with a finger makes pushing the push slider 3 easier. The push slider 3 has a positioning protrusion 33, and the cavity wall of the sliding cavity 11 has two positioning holes 111. The positioning holes 111 match the positioning protrusion 33. When the positioning protrusion 33 engages with different positioning holes 111, the push slider 3 is in two different positions, facilitating positioning of the push slider 3.

[0027] The cavity inside the hollow tube needle 2 is connected to the sliding cavity 11. One end of the push rod 4 is fixed to the end face of the push slider 3, and the push rod 4 is inserted into the cavity inside the hollow tube needle 2 from the sliding cavity 11. This structure facilitates the installation of the push slider 3 and the assembly of the push rod 4 with the hollow tube needle 2.

[0028] Combination Figure 6 and Figure 7 As shown, a cylindrical head 5 is slidably disposed inside the spiked end of the hollow needle 2. One end of the cylindrical head 5 is conical, and the tip of the cone is spherical. This structure prevents the cylindrical head 5 from accidentally piercing other parts during surgery. The other end of the cylindrical head 5 is connected to a suture 6. The suture 6 is a double-threaded structure with a closed tail, which facilitates the fixation of the suture 6 to the posterior horn of the meniscus. The suture 6 is made of polyetheretherketone (PEEK), which not only has sufficient strength and chemical stability but is also lightweight and suitable for surgical use. The suture 6 is formed by folding a single thread into a double thread, with the open end fixed to the cylindrical head 5. During production, a single thread is folded in half, and both ends are fixed to the cylindrical head 5.

[0029] The push rod 4 abuts against the columnar head 5. When the push rod 4 slides, it pushes the columnar head 5, causing the columnar head 5 to slide out of the hollow needle 2. A sleeve 7 is provided outside the hollow needle 2, and the spike of the hollow needle 2 protrudes outside the sleeve 7. There is a gap between the sleeve 7 and the hollow needle 2. The tube wall of the needle end of the hollow needle 2 has an axially arranged strip-shaped groove 22. The suture 6 extends from the end of the columnar head 5 through the strip-shaped groove 22 into the gap between the sleeve 7 and the hollow needle 2. This structure facilitates the storage and placement of the suture 6. One end of the hollow needle 2 is inserted into the handle 1 and fixed thereto. The outer wall of the hollow needle 2 has a protruding ring 8. The sleeve 7 and the protruding ring 8 fit tightly together, which facilitates the installation and fixation of the sleeve 7 and ensures that there is a gap between the sleeve 7 and the hollow needle 2.

[0030] The working process of this utility model is as follows: Figure 8 The diagram shows the structure of the meniscus. During surgery, a hole 101 is first drilled in the tibial plateau 10. The surgeon operates by holding the handle 1, causing the hollow needle 2 to pierce the posterior horn 91 of the meniscus 9. When the needle is just pierced, the surgeon pushes the pushing part 32 with his thumb, causing the pushing slider 3 to slide within the sliding cavity 11. The positioning protrusion 33 disengages from one positioning hole 111 and moves closer to another positioning hole 111. The sliding of the pushing slider 3 causes the pushing rod 4 to move within the hollow cavity. The cannula 2 slides inside and pushes the cylindrical head 5. When the positioning protrusion 33 engages with another positioning hole 111, the cylindrical head 5 is completely pushed out. At this time, the cylindrical head 5, along with the suture 6, passes through the posterior horn 91 of the meniscus. The cylindrical head 5 is clamped with suture pliers, the hollow cannula 2 is pulled out, the cylindrical head 5 is passed through the two threads at the tail of the suture 6, and then the cylindrical head 5 is passed through the hole 101 on the tibial plateau. The suture 6 is tightened, thereby fixing the posterior horn of the meniscus to the tibial plateau.

[0031] The above embodiments are preferred implementations of this utility model and are not intended to limit this utility model. Any obvious substitutions are within the protection scope of this utility model without departing from its concept.

Claims

1. A surgical instrument for fixing the posterior horn of the meniscus, comprising a handle (1), characterized in that: The handle is connected to a hollow tube needle (2), and a push slider (3) is provided on the handle. The push slider is connected to a push rod (4), which is inserted into the hollow tube needle. A columnar head (5) is slidably provided in the spike end of the hollow tube needle. One end of the columnar head is conical, and the tip of the cone is spherical. The other end of the columnar head is connected to a suture (6). The suture is a double-line structure with a closed tail. The push rod abuts against the columnar head. A sleeve (7) is provided outside the hollow tube needle. The spike of the hollow tube needle protrudes outside the sleeve. There is a gap between the sleeve and the hollow tube needle. The tube wall of the needle end of the hollow tube needle is provided with an axially arranged strip groove (22). The suture extends from the end of the columnar head through the strip groove to the gap between the sleeve and the hollow tube needle.

2. The surgical instrument for fixing the posterior horn of the meniscus according to claim 1, characterized in that: The hollow tube needle (2) has a bent part (21) at the tip, and the bent part is an arc-shaped transition.

3. The surgical instrument for fixing the posterior horn of the meniscus according to claim 2, characterized in that: One end of the hollow tube needle (2) is inserted into the handle (1) and fixed thereto. The outer wall of the hollow tube needle is provided with a convex ring (8), and the sleeve (7) is tightly fitted with the convex ring.

4. The surgical instrument for fixing the posterior horn of the meniscus according to claim 1, characterized in that: The suture (6) is made of polyetheretherketone material. The suture is made by folding a single thread into a double thread and then fixing one open end to the column head (5).

5. A surgical instrument for posterior horn fixation of the meniscus according to any one of claims 1-4, characterized in that: The handle (1) is provided with a sliding cavity (11), the push slider (3) is located in the sliding cavity and slides along the sliding cavity, the cavity in the hollow tube needle (2) is connected to the sliding cavity, one end of the push rod is fixed to the end face of the push slider, and the push rod is inserted into the cavity in the hollow tube needle from the sliding cavity.

6. A surgical instrument for fixing the posterior horn of the meniscus according to claim 5, characterized in that: The push slider (3) has grooves (31) on both sides, and the slide cavity (11) has slide rails (12) on both sides that match the grooves.

7. A surgical instrument for fixing the posterior horn of the meniscus according to claim 6, characterized in that: The push slider (3) is provided with a protruding push part (32), and the push part is provided with anti-slip texture.

8. A surgical instrument for fixing the posterior horn of the meniscus according to claim 7, characterized in that: The push slider (3) is provided with a positioning protrusion (33), and the cavity wall of the slide cavity (11) is provided with two positioning holes (111), which match the positioning protrusion.

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