Stitching instrument for knee joint operation and assembling method thereof

Abstract

The invention relates to a suture instrument for knee joint surgery, in particular to a suture instrument for knee joint surgery and an assembling method thereof.The suture instrument comprises a handle and a hollow suture hook, one end of the suture hook is movably connected with the front end of the handle, the other end of the suture hook can penetrate into a knee joint, and an elastic steel wire is arranged in an inner cavity of the suture hook. A suture line can penetrate into the inner cavity of the suture line hook from the handle; after the other end of the suture hook is punctured into a knee joint, the suture line is pushed from the rear end of the handle to extend out of the inner cavity of the suture hook, and then the elastic steel wire is pushed to abut against the extending part of the suture line until the suture hook exits, so that the suture line is effectively prevented from being brought out, the operation efficiency is improved, and the operation difficulty is reduced. In addition, one-time puncture thread passing success can be ensured, and the risk of tissue damage is greatly reduced.

Description

Technical Field

[0001] This invention relates to suture instruments for knee joint surgery, specifically a suture device for knee joint surgery and its assembly method. Background Technology

[0002] Knee injuries are common due to exercise, aging, or other factors, leading to pain, functional impairment, and even joint degeneration. For more severe cases, knee surgery is generally required. Currently, most knee surgeries are performed arthroscopically, such as meniscus repair, which allows for precise suturing and repair of the meniscus without damaging the normal structure of the knee joint. During meniscus repair, the surgeon inserts a needle into the meniscus tear, then pulls out the suture, and then withdraws the needle. However, during withdrawal, the friction between the suture and the needle can easily pull the suture out, leading to failed suture placement. This necessitates repeated punctures, prolonging the surgery time and increasing the risk of injury. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention provides a suture device for knee joint surgery that prevents sutures from being pulled out and a method for assembling the same.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a suture device for knee joint surgery, comprising a handle and a hollow suture hook, one end of which is movably connected to the front end of the handle and the other end of which can be inserted into the knee joint. An elastic steel wire is provided in the inner cavity of the suture hook, and a suture can be inserted into the inner cavity of the suture hook from the handle. After the other end of the suture hook is inserted into the knee joint, the suture is pushed out of the inner cavity of the suture hook from the rear end of the handle, and then the extended part of the suture is held in place by pushing the elastic steel wire.

[0005] Preferably, the suture hook consists of a connecting section, an arc-shaped section, and a hook tip. One end of the connecting section is connected to the front end of the handle by a thread, and the other end is connected to one end of the arc-shaped section. The outer wall of the other end of the arc-shaped section is provided with the hook tip that can be inserted into the knee joint. The suture extending out of the inner cavity of the other end of the arc-shaped section is held in place by the elastic steel wire provided in the inner cavity of the arc-shaped section.

[0006] Preferably, one end of the elastic steel wire passes through the arc-shaped section, the connecting section, and the handle in sequence and extends out of the rear end of the handle. The other end of the elastic steel wire is provided with an elastic fork in the radial direction. Pushing one end of the elastic steel wire from the rear end of the handle can hold the suture thread that is inserted into the elastic fork.

[0007] Preferably, the elastic fork is formed in an arc shape according to the cross-section of the inner cavity wall of the arc segment, and the elastic fork and the elastic wire are disposed on the side of the inner cavity of the arc segment near the hook tip.

[0008] Preferably, the handle has an axially provided opening groove in the middle to accommodate the suture, and an axially provided thread inlet hole in front of the handle communicating with the opening groove, and one end of the connecting section is threadedly connected to the thread inlet hole.

[0009] Preferably, the handle has a push-thread hole axially connected to the opening groove at its rear. One end of the suture passes through the opening groove into the push-thread hole and extends out of the rear end of the handle. The other end of the suture passes through the opening groove in sequence through the thread inlet hole, the inner cavity of the connecting section, and into the inner cavity of the arc-shaped section.

[0010] Preferably, an axial channel is provided in the inner cavity of the arc-shaped segment on the side near the hook tip. The channel extends from the arc-shaped starting position of the arc-shaped segment to near the hook tip, and the elastic steel wire passes through the channel.

[0011] This invention provides a method for assembling a suture device for knee joint surgery, comprising the following steps: (1) Secure the sewing hook to the front end of the handle via its connecting section; (2) Insert the other end of the suture into the elastic fork at the other end of the elastic wire, and then simultaneously insert the other ends of the suture and the elastic wire into the inlet hole at the front of the handle through the opening groove in the middle of the handle, and push them through the connecting section into the inner cavity of the arc section of the suture hook until they are close to the tip of the suture hook. (3) Then push one end of the suture and one end of the elastic wire into the push hole at the back of the handle from the opening groove until one end of both extends out of the back of the handle. (4) Finally, pull one end of the suture and the elastic wire from the rear end of the handle so that the other end of the elastic fork and the other end of the suture retract into the inner cavity of the arc segment.

[0012] The present invention also provides another method for assembling a suture device for knee joint surgery, which includes the following steps: (1) Secure the suture hook to the front end of the handle through its connecting section, and insert the other end of the suture thread through the opening slot in the middle of the handle into the thread inlet hole at the front of the handle, and push it through the connecting section of the suture hook into the inner cavity of the arc section of the suture hook until it is close to the hook tip. (2) Push one end of the suture into the push hole at the rear of the handle from the opening slot until it extends out of the rear end of the handle; (3) Insert one end of the elastic steel wire into the arc section from the hook tip, so that it passes through the arc section, the connecting section and the inlet hole in sequence and enters the opening groove, and then pull one end of the elastic steel wire out from the opening groove; (4) Insert one end of the elastic steel wire through the opening slot into the push wire hole and extend it out of the rear end of the handle; (5) Pull one end of the elastic wire and the suture from the rear end of the handle, so that the elastic fork at the other end of the elastic wire and the other end of the suture retract into the inner cavity of the arc segment, and the suture is inserted into the elastic fork.

[0013] Preferably, when inserting one end of the elastic steel wire from the hook tip, the end of the elastic steel wire is inserted along the channel set in the inner cavity of the arc section until it passes through the connecting section and the inlet hole in sequence and enters the opening groove.

[0014] As can be seen from the above technical solution, the present invention has an elastic steel wire in the inner cavity of the suture hook. When the suture hook is inserted into the injured area of ​​the knee joint and the suture is pushed out from the suture hook, the end of the suture can be held in the tissue by pushing the elastic steel wire until the suture hook is withdrawn, thereby effectively preventing the suture from being pulled out. This not only improves the efficiency of the operation, but also ensures that the suture is successfully passed through the suture in one attempt, and greatly reduces the risk of tissue damage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external three-dimensional structure of the suture device of the present invention.

[0016] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0017] Figure 3 This is a cross-sectional view of the suture device of the present invention. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0019] like Figure 1 , Figure 2 and Figure 3 This invention provides a suture device for knee joint surgery, comprising a handle 1 and a hollow suture hook 2. One end of the suture hook is movably connected to the front end of the handle, and the other end can be inserted into the knee joint, such as to a site of meniscus injury. An elastic steel wire 3 is provided in the inner cavity of the suture hook, and a suture 4 can be inserted into the inner cavity of the suture hook from the handle. After the other end of the suture hook is inserted into the knee joint, the suture is pushed out of the inner cavity of the suture hook from the rear end of the handle, and then the extended part of the suture is held in place by pushing the elastic steel wire. Thus, when the suture hook is withdrawn, the suture will not be pulled out, which not only improves surgical efficiency but also reduces the risk of tissue damage.

[0020] Specifically, the suture hook 2 consists of a connecting section 21, an arc-shaped section 22, and a hook tip 23. One end of the connecting section is threaded to the front end of the handle, and the other end is connected to one end of the arc-shaped section. Thus, the handle is movably connected to the suture hook via the connecting section. The handle can connect suture hooks of different lengths and models, greatly improving the adaptability of this suture device. The outer wall of the other end of the arc-shaped section is provided with a hook tip that can penetrate into the knee joint. The suture extending into the inner cavity of the other end of the arc-shaped section is held in place by an elastic steel wire located within the inner cavity of the arc-shaped section. This invention uses an arc-shaped suture hook, which is beneficial for suturing tears such as those in the meniscus, providing good puncture effect and further reducing the risk of injury.

[0021] During implementation, one end of the elastic steel wire 3 passes sequentially through the arc-shaped section, the connecting section, and the handle, extending beyond the rear end of the handle. The other end of the elastic steel wire is radially provided with an elastic fork 31. Pushing one end of the elastic steel wire from the rear end of the handle can hold the suture thread inserted into the elastic fork, thereby effectively preventing the suture thread from being pulled out when the hook is retracted. Preferably, the elastic fork 31 is arc-shaped, formed according to the cross-section of the inner cavity wall of the arc-shaped section, so that it can fit tightly against the inner cavity of the arc-shaped section, reducing the space occupied. Moreover, the elastic fork and the elastic steel wire are located on the side of the inner cavity of the arc-shaped section near the hook tip. Thus, when the elastic steel wire is pushed out, the elastic steel wire will move along the arc. As it continues to move, under the combined action of inertia and thrust, the elastic fork will move away from the hook tip, thereby approaching the suture thread and tightening the suture thread, improving the stability of the tightening.

[0022] Preferably, the handle 1 has an axially oriented opening groove 11 at its center to accommodate the suture, and an axially oriented thread inlet hole 12 communicating with the opening groove at the front of the handle. One end of the connecting section is threadedly connected to the thread inlet hole. Since the inner cavities of the handle and the suture hook are relatively long, the opening groove facilitates the threading of the elastic wire and the suture through them. The rear of the handle has an axially oriented thread push hole 13 communicating with the opening groove. One end of the suture passes through the opening groove into the thread push hole and extends out from the rear end of the handle. The other end of the suture passes through the opening groove sequentially through the thread inlet hole, the inner cavity of the connecting section, and into the inner cavity of the arc-shaped section, thereby achieving the installation of the suture and the elastic wire.

[0023] To prevent the elastic wire from interfering with the suture, the present invention provides an axial channel 24 in the inner cavity of the arc-shaped segment near the hook tip. This channel extends from the arc-shaped starting position of the arc-shaped segment to near the hook tip. The elastic wire passes through this channel, allowing the elastic fork to be positioned near the hook tip, ensuring the stability of the elastic fork's clamping. During the procedure, when performing meniscus tear suturing, the suture and elastic wire are first installed. The doctor holds the rear of the handle and inserts the hook tip into the meniscus tear. Then, the suture is pushed forward from the rear of the handle to extend out of the inner cavity of the arc-shaped segment. Next, the elastic wire is pushed forward from the rear of the handle so that its elastic fork clamps the suture tightly against the meniscus wall. Then, the doctor fixes the suture and elastic wire at the rear of the handle, holds the rear of the handle, pulls the handle and suture hook back, and then pulls the suture to perform surgical suturing, while simultaneously pulling the elastic wire into the suture hook.

[0024] This invention also provides a method for assembling the aforementioned suture device for knee joint surgery. Specifically, the suture hook is first secured to the front end of the handle via its connecting section, and the other end of the suture is inserted into the elastic fork at the other end of the elastic wire. Then, the other ends of both the suture and the elastic wire are simultaneously inserted through the inlet hole at the front of the handle through the opening slot in the middle of the handle, and pushed through the connecting section into the inner cavity of the arc-shaped section of the suture hook until they are close to the hook tip. Next, one end of the suture and one end of the elastic wire are simultaneously pushed into the push hole at the rear of the handle through the opening slot until one end of both extends beyond the rear end of the handle. Finally, one end of both the suture and the elastic wire is pulled taut from the rear end of the handle, causing the elastic fork and the other end of the suture to retract into the inner cavity of the arc-shaped section. This assembly method is relatively simple to operate. It is essential to ensure that the elastic fork is located near the hook tip so that when the elastic wire is pushed, the elastic fork clamps the suture tightly against the bone wall of the joint.

[0025] As another method for assembling a suture device for knee joint surgery, the suture hook is first secured to the front end of the handle through its connecting section. The other end of the suture is then inserted through the opening slot in the middle of the handle into the suture inlet hole at the front of the handle, and pushed through the connecting section of the suture hook into the inner cavity of the arc-shaped section of the suture hook until it approaches the tip of the suture hook. Then, one end of the suture is pushed into the push hole at the rear of the handle through the opening slot until it extends out of the rear end of the handle to install the suture.

[0026] Next, insert one end of the elastic wire into the arc section from the hook tip, so that it passes through the arc section, the connecting section and the inlet hole in sequence and into the opening slot. Then pull one end of the elastic wire out from the opening slot. Then insert one end of the elastic wire into the push hole from the opening slot and extend it out from the rear end of the handle to install the elastic wire.

[0027] Then, pull one end of both the elastic wire and the suture thread taut from the rear of the handle, causing the elastic fork at the other end of the elastic wire and the other end of the suture thread to retract into the inner cavity of the arc-shaped section. Secure the suture thread into the elastic fork so that it is positioned closer to the hook tip. Preferably, when inserting one end of the elastic wire from the hook tip, insert that end along the channel provided within the inner cavity of the arc-shaped section until it passes sequentially through the connecting section and the inlet hole into the opening slot. This ensures that the elastic wire and the elastic fork are positioned closer to the hook tip, improving the stability of the fork tightening.

Claims

1. A suture device for knee joint surgery, comprising a handle and a hollow suture hook, characterized in that: One end of the suture hook is movably connected to the front end of the handle, and the other end can be inserted into the knee joint. An elastic steel wire is provided in the inner cavity of the suture hook, and a suture can be inserted into the inner cavity of the suture hook from the handle. After the other end of the suture hook is inserted into the knee joint, the suture is pushed out of the inner cavity of the suture hook from the rear end of the handle, and then the extended part of the suture is held in place by pushing the elastic steel wire.

2. The suture device for knee joint surgery according to claim 1, characterized in that: The suture hook consists of a connecting section, an arc-shaped section, and a hook tip. One end of the connecting section is connected to the front end of the handle by a thread, and the other end is connected to one end of the arc-shaped section. The outer wall of the other end of the arc-shaped section is provided with the hook tip that can be inserted into the knee joint. The suture extending out of the inner cavity of the other end of the arc-shaped section is held in place by the elastic steel wire provided in the inner cavity of the arc-shaped section.

3. The suture device for knee joint surgery according to claim 2, characterized in that: One end of the elastic steel wire passes through the arc-shaped section, the connecting section, and the handle in sequence and extends out of the rear end of the handle. The other end of the elastic steel wire is provided with an elastic fork in the radial direction. Pushing one end of the elastic steel wire from the rear end of the handle can hold the suture thread that is stuck in the elastic fork.

4. The suture device for knee joint surgery according to claim 3, characterized in that: The elastic fork is formed in an arc shape according to the cross-section of the inner cavity wall of the arc segment, and the elastic fork and the elastic wire are disposed on the side of the inner cavity of the arc segment near the hook tip.

5. The suture device for knee joint surgery according to claim 2, characterized in that: The handle has an axially oriented opening groove in the middle to accommodate the suture thread, and an axially oriented inlet hole communicating with the opening groove is provided at the front of the handle. One end of the connecting section is threadedly connected to the inlet hole.

6. The suture device for knee joint surgery according to claim 5, characterized in that: The handle has a push-thread hole axially connected to the opening groove at its rear. One end of the suture passes through the opening groove into the push-thread hole and extends out of the rear end of the handle. The other end of the suture passes through the opening groove in sequence through the thread inlet hole, the inner cavity of the connecting section, and into the inner cavity of the arc-shaped section.

7. The suture device for knee joint surgery according to any one of claims 2 to 6, characterized in that: An axial channel is provided in the inner cavity of the arc-shaped segment on the side near the hook tip. The channel extends from the arc-shaped starting position of the arc-shaped segment to near the hook tip, and the elastic steel wire passes through the channel.

8. A method for assembling a suture device for knee joint surgery according to any one of claims 1 to 7, characterized by comprising the following steps: (1) Secure the sewing hook to the front end of the handle via its connecting section; (2) Insert the other end of the suture into the elastic fork at the other end of the elastic wire, and then simultaneously insert the other ends of the suture and the elastic wire into the inlet hole at the front of the handle through the opening groove in the middle of the handle, and push them through the connecting section into the inner cavity of the arc section of the suture hook until they are close to the tip of the suture hook. (3) Then push one end of the suture and one end of the elastic wire into the push hole at the back of the handle from the opening groove until one end of both extends out of the back of the handle. (4) Finally, pull one end of the suture and the elastic wire from the rear end of the handle so that the other end of the elastic fork and the other end of the suture retract into the inner cavity of the arc segment.

9. A method for assembling a suture device for knee joint surgery according to any one of claims 1 to 7, characterized by comprising the following steps: (1) Secure the suture hook to the front end of the handle through its connecting section, and insert the other end of the suture thread through the opening slot in the middle of the handle into the thread inlet hole at the front of the handle, and push it through the connecting section of the suture hook into the inner cavity of the arc section of the suture hook until it is close to the hook tip. (2) Push one end of the suture into the push hole at the rear of the handle from the opening slot until it extends out of the rear end of the handle; (3) Insert one end of the elastic steel wire into the arc section from the hook tip, so that it passes through the arc section, the connecting section and the inlet hole in sequence and enters the opening groove, and then pull one end of the elastic steel wire out from the opening groove; (4) Insert one end of the elastic steel wire through the opening slot into the push wire hole and extend it out of the rear end of the handle; (5) Pull one end of the elastic wire and the suture from the rear end of the handle, so that the elastic fork at the other end of the elastic wire and the other end of the suture retract into the inner cavity of the arc segment, and the suture is inserted into the elastic fork.

10. The method for assembling the suture device for knee joint surgery according to claim 9, characterized in that: When inserting one end of the elastic steel wire from the hook tip, insert that end of the elastic steel wire along the channel set in the inner cavity of the arc section until it passes through the connecting section and the inlet hole in sequence and enters the opening slot.

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