CN217592949U - Meniscus stitching instrument - Google Patents

Abstract

The utility model provides a meniscus stapler, which belongs to the technical field of medical instruments. The meniscus stapler includes a piercing structure and a wire grab push rod. The puncture structure includes a proximal sleeve and a puncture sleeve rod. One end of the proximal sleeve has a partition plate, and the partition plate has a mounting hole. One end of the puncture sleeve rod is fixedly connected with the partition plate and communicated with the interior of the proximal sleeve through the installation hole. . The other end of the puncture sleeve rod is provided with a puncture tip, and the inside of the puncture sleeve rod is provided with a wire-catching guide hole. The thread catcher rod includes a push ring, an inner core push rod and two elastic thread catcher guide wires. The inner core push rod is slidably installed inside the thread catching guide hole, one end of the inner core push rod is connected with the push ring, the push ring has a guide sleeve arranged around the inner core push rod, and the guide sleeve can be slidably inserted into the push ring. In the proximal sleeve, two elastic thread-grabbing guide wires are connected to the other end of the inner core push rod. The meniscus suturing device has a simple structure and is easy to operate, can effectively improve the efficiency of meniscus suturing after arthroscopic surgery, and shorten the operation time.

Description

meniscus stapler

technical field

The utility model relates to the technical field of medical instruments, in particular to a meniscus stapler.

Background technique

The meniscus plays a vital role in the internal load transmission, shock absorption, joint stability, joint lubrication, cartilage nutrition and neuromuscular proprioception of the knee joint, and is of great significance to maintaining the normal function of the knee joint. Knee meniscus injury is one of the most common sports injuries among sports people, which can lead to knee pain, interlocking and cartilage wear, and then lead to accelerated knee joint degeneration and other consequences. Stable meniscal injuries can be managed conservatively if they are asymptomatic. Meniscal injuries that cause persistent symptoms require arthroscopic surgery.

In the related art, the meniscus surgical treatment methods mainly include partial or total meniscectomy and meniscus suture. With the in-depth understanding of the function of the meniscus, arthroscopic meniscus suture has gradually become one of the main treatment methods for meniscal injuries. Meniscal suture techniques include inside-out techniques, outside-in techniques, and all-inside techniques. At present, there are mature fully internal suturing devices on the market for the suturing of the posterior and posterior angle of the meniscus body, but the applicability of suturing for the tear of the anterior angle and the body position of the meniscus is poor. In clinical practice, it is usually done by the outside-in technique through lumbar puncture or some commercial anterior angle suturing instruments.

The use of the meniscus suturing method in the related art requires multiple operations such as puncture of the affected area under arthroscopy, thread crossing in the joint cavity and thread grasping, and it is difficult to control the position of the needle exiting the meniscus in the joint. The operation is complicated and the operation relatively long time.

Utility model content

The embodiment of the utility model provides a meniscus suture device, which has a simple structure and is easy to operate, which can effectively improve the efficiency of meniscus suture after arthroscopic surgery and shorten the operation time. The technical solution is as follows:

The embodiment of the present utility model provides a meniscus stapler, comprising: a puncture structure and a thread grabbing push rod,

The puncture structure includes a proximal sleeve and a puncture sleeve rod, one end of the proximal sleeve has a partition plate, and the partition plate has a mounting hole, the diameter of the mounting hole is smaller than the inner diameter of the proximal sleeve One end of the puncture sleeve rod is fixedly connected with the partition plate and communicated with the inside of the proximal sleeve through the installation hole, the other end of the puncture sleeve rod has a puncture tip, and the inside of the puncture sleeve rod is There are wire-catching guide holes arranged along the axis direction and communicating with both ends;

The thread catching push rod includes a push ring, an inner core push rod and two elastic thread catching guide wires, the inner core push rod is slidably installed inside the thread catching guide hole, and one end of the inner core push rod Connected with the push ring, the connection between the push ring and the elastic wire-catching guide wire has a guide sleeve, the guide sleeve is coaxial with the inner core push rod and is arranged around the inner core push rod , the outer diameter of the guide sleeve is the same as the inner diameter of the proximal sleeve, the guide sleeve is slidably inserted into the proximal sleeve, and the two elastic wire-catching guide wires are connected to The other end of the inner core push rod is arranged at an acute angle, and the ends of the two elastic thread-catching guide wires are bent and arranged opposite to each other.

Optionally, one end of the proximal sleeve is provided with a holding and abutting rod, and the holding and abutting rods are arranged along the radial direction of the proximal sleeve.

Optionally, the proximal sleeve is provided with two holding and abutting rods, and the two holding and abutting rods are symmetrically arranged relative to the proximal-end sleeve.

Optionally, the meniscus stapler further includes a compression spring, the compression spring is disposed in the proximal sleeve and sleeved on the inner core push rod, and one end of the compression spring is connected to the spacer. The plates are fixedly connected, and the other end of the compression spring is in abutment with the end of the guide sleeve.

Optionally, the puncture tip is detachably connected to the puncture sleeve rod.

Optionally, the elastic thread-catching guide wire is wavy in the extending direction.

Optionally, the elastic grip wire guide wire is a titanium alloy guide wire.

Optionally, the puncture sleeve rod and the inner core push rod are made of stainless steel.

The beneficial effects brought by the technical solutions provided by the embodiments of the present utility model include at least:

Under arthroscopy, the needle entry and exit positions of the target meniscus suture can be flexibly adjusted to effectively avoid important neurovascular tissues. The same patient can be punctured and sutured repeatedly during the operation, without the limitation of the number of suture needles, and both the medial and lateral meniscus can be used. The wire grabbing structure at the end is composed of two prefabricated elastic wire grabbing guide wires with elastic tensioning and closing design. The wire grabbing and releasing are convenient and fast, the structure is simple, and the operation is easy, which can effectively improve the suture of the meniscus in arthroscopic surgery. efficiency and shorten the operation time.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a schematic structural diagram of a meniscus stapler provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the elastic grasping wire guide wire in the extended grasping state in the meniscus stapler provided by the embodiment of the present invention;

3 is a schematic structural diagram of a puncture structure provided by an embodiment of the present invention;

4 is a schematic structural diagram of a thread catcher and push rod provided by an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

In the related art, the meniscus surgical treatment methods mainly include partial or total meniscectomy and meniscus suture. With the in-depth understanding of the function of the meniscus, arthroscopic meniscus suture has gradually become one of the main treatment methods for meniscal injuries. Meniscal suture techniques include inside-out techniques, outside-in techniques, and all-inside techniques. At present, there are mature fully internal suturing devices on the market for the suturing of the posterior and posterior angle of the meniscus body, but the applicability of suturing for the tear of the anterior angle and the body position of the meniscus is poor. In clinical practice, it is usually done by the outside-in technique through lumbar puncture or some commercial anterior angle suturing instruments.

The use of the meniscus suturing method in the related art requires multiple operations such as puncture of the affected area under arthroscopy, thread crossing in the joint cavity and thread grasping, and it is difficult to control the position of the needle exiting the meniscus in the joint. The operation is complicated and the operation relatively long time.

FIG. 1 is a schematic structural diagram of a meniscus stapler provided by an embodiment of the present invention. FIG. 2 is a schematic structural diagram of the elastic grasping wire guide wire in the extended grasping state in the meniscus stapler provided by the embodiment of the present invention. FIG. 3 is a schematic structural diagram of a puncture structure provided by an embodiment of the present invention. 4 is a schematic structural diagram of a thread catcher and push rod provided by an embodiment of the present invention. As shown in FIGS. 1 to 4 , through practice, the applicant provides a meniscus stapler, which includes a puncturing structure 1 and a thread grabbing push rod 2 .

The puncture structure 1 includes a proximal sleeve 11 and a puncture sleeve rod 12 . One end of the proximal sleeve 11 has a partition plate 111 , the partition plate 111 has an installation hole 1111 , and the diameter of the installation hole 1111 is smaller than the inner diameter of the proximal sleeve 11 . One end of the puncture sleeve rod 12 is fixedly connected with the diaphragm 111 and communicated with the interior of the proximal sleeve 11 through the installation hole 1111. The other end of the puncture sleeve rod 12 has a puncture tip 121, and the puncture sleeve rod 12 has a puncture tip 121 arranged in the axial direction. Connect the thread catcher guide holes 122 at both ends.

The thread grabbing push rod 2 includes a push ring 21 , an inner core push rod 22 and two elastic thread grabbing guide wires 23 . The inner core push rod 22 is slidably installed in the inside of the thread catching guide hole 122, one end of the inner core push rod 22 is connected with the push ring 21, and the connection between the push ring 21 and the elastic thread catching guide wire 23 has a guide sleeve 211, which guide The sleeve 211 is coaxial with the inner core push rod 22 and is disposed around the inner core push rod 22 . The outer diameter of the guide sleeve 211 is the same as the inner diameter of the proximal sleeve 11 , and the guide sleeve 211 is slidably inserted into the proximal sleeve 11 . The two elastic thread-catching guide wires 23 are connected to the other end of the inner core push rod 22 and arranged at an acute angle, and the ends of the two elastic thread-catching guide wires 23 are bent and arranged opposite to each other.

In the embodiment of the present invention, when performing arthroscopic meniscus surgery, if the anterior horn and body position of the meniscus are torn through arthroscopic exploration, the meniscus stapler can be sterilized and packaged by ethylene oxide Take out the spare. After finishing the trimming and freshening of the site to be sutured, place sutures in the joint cavity near the target suture site. Before the meniscus is sutured, the operator first adjusts the relative position of the inner core push rod 22 in the wire grasping guide hole 122 through the push ring 21, and collects the two elastic thread grasping guide wires 23 located at the other end thereof together to grasp the wire guide hole 122. After that, you can hold the proximal sleeve 11, select an appropriate skin puncture site on the patient's skin, and under the monitoring of the arthroscope, pull out the needle at the suture position of the target meniscus, and perform puncture through the puncture tip 121 and the puncture sleeve rod 12. , so that the puncture tip 121 is close to the position of the suture. Then push the push ring 21 toward the patient's body again, so that the two elastic thread grasping guide wires 23 protrude from the thread grasping guide hole 122 and open under the action of their own elasticity, and adjust to one end of the suture under the monitoring of the arthroscope. on both sides. After the two elastic thread grasping guide wires 23 are adjusted to the grasping position, the operator can pull the push ring 21 outward, and the two elastic thread grasping guide wires 23 will be closed and merged during the process of retracting to the thread grasping guide hole 122 . Grip and grab the suture. Finally, the operator pulls out the puncture sleeve rod 12 as a whole from the patient's body, so that one end of the suture can be taken out from the affected part together. After that, the other end of the suture is brought out by the same operation steps, and the tension of the suture can be adjusted under the arthroscope, and then the subcutaneous knot is fixed, and the suture of the meniscus is completed once.

By using the meniscus suture provided by the embodiment of the present invention, the needle insertion and extraction positions of the target meniscus suture position can be flexibly adjusted under arthroscopy, and the important neurovascular tissue can be effectively avoided. The same patient can be punctured and sutured repeatedly during the operation, without the limitation of the number of suture needles, and both the medial and lateral meniscus can be used. The wire grabbing structure at the end is composed of two prefabricated elastic wire grabbing guide wires 23 with elastic tensioning and closing design. The wire grabbing and releasing are convenient and quick, the structure is simple, and the operation is easy, which can effectively improve the meniscus suture after arthroscopic surgery. efficiency and shorten the operation time.

Optionally, one end of the proximal sleeve 11 has a holding rod 112 , and the holding rod 112 is arranged along the radial direction of the proximal sleeve 11 . Exemplarily, in the embodiment of the present invention, when performing puncturing and applying the needle, the operator can hold the holding rod 112 to exert force, which makes the puncturing process more convenient and labor-saving, and makes it easier and more accurate to puncture the exact target. Position, further improve the efficiency of meniscus suture after arthroscopic surgery, shorten the operation time.

Optionally, the proximal sleeve 11 has two holding and abutting rods 112 , and the two holding and abutting rods 112 are symmetrically arranged relative to the proximal sleeve 11 . Exemplarily, in the embodiment of the present invention, by symmetrically arranging two holding rods 112 on the proximal sleeve 11, the meniscus stapler has a structure similar to a syringe as a whole. The two gripping rods 112 can be used as finger hooks. When performing puncture and needle application, the operator can use the thumb to control the push ring 21, the index finger hooks one of the gripping rods 112, and the middle finger, ring finger and The little finger can hook another holding rod 112 to achieve further stable holding of the meniscus stapler, and at the same time, it is convenient to control the push ring 21 to grasp the suture. The puncture process is more convenient and labor-saving, and it is easier and more accurate to puncture to an accurate target position, which further improves the efficiency of meniscus suture after arthroscopic surgery and shortens the operation time.

Optionally, the meniscus stapler further includes a compression spring 3, the compression spring 3 is disposed in the proximal sleeve 11 and sleeved on the inner core push rod 22, one end of the compression spring 3 is fixedly connected to the diaphragm 111, and the compression spring The other end of 3 is in contact with the end of the guide sleeve 211 . Exemplarily, in the embodiment of the present invention, by arranging the compression spring 3 between the end of the guide sleeve 211 and the diaphragm 111, when the puncture tip 121 does not reach the grasping position of the suture, its elasticity Under the action, the relative position of the guide sleeve 211 in the proximal sleeve 11 can be defined, so as to limit the position of the inner core push rod 22 , so that the two elastic thread grasping guide wires 23 are kept in the thread grasping guide hole 122 . When the operator pushes the push ring 21 toward the patient's body, so that the two elastic thread grasping guide wires 23 protrude from the thread grasping guide hole 122 and expand under the action of their own elasticity, the compression spring 3 will be in a compressed state. After the two elastic thread grasping guide wires 23 are adjusted to the grasping position, the operator can release the push ring 21 and the compression spring 3 can push the guide sleeve 211 , the push ring 21 and the inner core push rod 22 under the action of the elastic force. Push back, and the two elastic thread grasping guide wires 23 will automatically retract into the thread grasping guide hole 122 to be closed and clamp and grasp the suture. The operator does not need to actively adjust the push ring 21 for grasping operation, which is convenient and labor-saving, further improves the efficiency of meniscus suture after arthroscopic surgery, and shortens the operation time.

Optionally, the puncture tip 121 is detachably connected to the puncture sleeve 12 . Exemplarily, in the embodiment of the present invention, by setting the puncture tip 121 and the puncture sleeve rod 12 as detachable structures, the operator can select different puncture tips 121 according to the specific conditions of the patient's affected area, such as straight Type, left arc type and right arc type to carry out targeted puncture to ensure the best surgical effect.

Optionally, the elastic thread grasping guide wire 23 is wavy in the extending direction. Exemplarily, in the embodiment of the present invention, by setting the elastic thread grasping guide wire 23 into a wavy shape with a certain arc, the contact area with the suture can be increased when grasping the suture, and at the same time the two elastic threads When the guide wire 23 is closed, the wavy wire body can form a tooth-like meshing, which improves the clamping tightness of the grasped suture and prevents the suture from loosening during the process of pulling out the patient's body.

Optionally, the elastic grasping wire guide wire 23 is a titanium alloy guide wire. Exemplarily, in the embodiment of the present invention, the elastic thread-grasping guide wire 23 of titanium alloy is used, which has good biocompatibility, can ensure minimal biological reaction with the human body, and is non-toxic and non-magnetic. At the same time, it has the advantages of high strength and low elastic modulus, which not only meets the mechanical requirements, but also is similar to the elastic modulus of human natural bone, which can reduce the stress shielding effect and is more conducive to the growth and healing of human bone after operation. Minimal interference with articular cartilage and other adjacent tissue structures also reduces the risk of wire breakage during wire grabbing.

Optionally, the puncture sheath rod 12 and the inner core push rod 22 are made of stainless steel. Exemplarily, in the embodiment of the present invention, the puncture sleeve rod 12 and the inner core push rod 22 made of stainless steel have good biocompatibility and mechanical properties, and at the same time have strong resistance to body fluid corrosion, good processability and good formability. It is convenient for sterilization, which further improves the medical advantages of the meniscus stapler.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. "First", "second" and similar words used in the description of the patent application for this utility model and the claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Likewise, "a" or "an" and the like do not denote a quantitative limitation, but rather denote the presence of at least one. Words like "include" or "include" mean that the elements or items appearing before "including" or "including" cover the elements or items listed after "including" or "including" and their equivalents, and do not exclude other component or object. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to indicate the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

The above are only optional embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (8)

1. A meniscal stapler, comprising: a puncture structure (1) and a line-grabbing push rod (2),

the puncture structure (1) comprises a proximal sleeve (11) and a puncture loop bar (12), one end of the proximal sleeve (11) is provided with a partition plate (111), the partition plate (111) is provided with a mounting hole (1111), the diameter of the mounting hole (1111) is smaller than the inner diameter of the proximal sleeve (11), one end of the puncture loop bar (12) is fixedly connected with the partition plate (111) and is communicated with the inside of the proximal sleeve (11) through the mounting hole (1111), the other end of the puncture loop bar (12) is provided with a puncture tip (121), and the inside of the puncture loop bar (12) is provided with a suture grasping guide hole (122) which is arranged along the axial direction and is communicated with the two ends;

the wire grabbing push rod (2) comprises a push ring (21), an inner core push rod (22) and two elastic wire grabbing guide wires (23), the inner core push rod (22) is slidably mounted inside a wire grabbing guide hole (122), one end of the inner core push rod (22) is connected with the push ring (21), a guide sleeve (211) is arranged at the joint of the push ring (21) and the elastic wire grabbing guide wires (23), the guide sleeve (211) and the inner core push rod (22) are coaxial and surround the inner core push rod (22), the outer diameter of the guide sleeve (211) is the same as the inner diameter of the near-end sleeve (11), the guide sleeve (211) can be slidably inserted into the near-end sleeve (11), the two elastic wire grabbing guide wires (23) are connected to the other end of the inner core push rod (22) and arranged in an acute angle, and the tail ends of the two elastic wire grabbing guide wires (23) are oppositely bent.

2. Meniscus stapler according to claim 1, characterized in that the proximal sleeve (11) has at one end a catch lever (112), the catch lever (112) being arranged in a radial direction of the proximal sleeve (11).

3. Meniscus stapler according to claim 2, characterized in that the proximal sleeve (11) has two holding bars (112), the two holding bars (112) being arranged symmetrically with respect to the proximal sleeve (11).

4. Meniscus stapler according to claim 1, characterized in that it further comprises a compression spring (3), the compression spring (3) being arranged inside the proximal sleeve (11) and sleeved on the inner core push rod (22), one end of the compression spring (3) being fixedly connected with the diaphragm (111), the other end of the compression spring (3) abutting against the end of the guide sleeve (211).

5. Meniscus stapler according to claim 1, characterized in that the piercing spike (121) is detachably connected with the piercing stem (12).

6. Meniscal stapler according to claim 1, characterized in that said elastic catch wire (23) is undulated in the extension direction.

7. Meniscal stapler according to claim 6, characterized in that said elastic grasping wire (23) is a titanium alloy wire.

8. Meniscus stitching instrument according to claim 1, characterized in that the piercing sleeve rod (12) and the core pusher rod (22) are stainless steel.

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