Stitching instrument

Abstract

The utility model provides a stitching instrument which comprises a first puncture needle and a second puncture needle. The first suture assembly comprises a first suture line and a fixing piece, the fixing piece is fixedly arranged at one end of the first suture line, at least part of the fixing piece is made of a deformable material, the fixing piece has a contraction state and an extension state, when the fixing piece is in the contraction state, the fixing piece can be contained in the cavity of the first puncture needle, and when the fixing piece is in the extension state, the fixing piece can be stretched; when the fixing part is separated from the first puncture needle, at least part of the fixing part extends in the radial direction of the first suture line, so that the fixing part is restored to the extending state; at least part of the pushing part is arranged in the cavity of the first puncture needle, and the pushing part is movably arranged in the length direction of the first puncture needle so as to push the fixing piece to be disengaged from the first puncture needle. According to the stitching instrument, the technical problem that stitching is not firm due to the fact that the thread end of a stitching instrument in the related technology is prone to being separated from tissue is solved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and more particularly to a stapler. Background Art

[0002] With the progress of medical technology, minimally invasive surgery is increasingly used in clinical operations. During minimally invasive surgery, due to the small access port, there are also great difficulties in suturing some internal wounds, especially for some wounds with deep hidden positions, and the suturing operation will become more difficult. For example, for patients with lumbar disc herniation, the annulus fibrosus between two adjacent vertebral bodies ruptures, and the internal nucleus pulposus protrudes, compressing the nerve root, resulting in low back pain, weakness, muscle paralysis or sensory abnormalities. During the treatment process, it is necessary to remove the protruding nucleus pulposus and suture the tear in the annulus fibrosus. However, due to the deep and hidden position of the lumbar spine, it is also difficult to suture the tear in the annulus fibrosus during minimally invasive surgery.

[0003] Some staplers in the related art can achieve suturing of the tear in the annulus fibrosus. In one implementation, stakes can be implanted on both sides of the tear in the annulus fibrosus through a puncture needle, and a suture is led out from each of the two stakes. By tying the two sutures, the purpose of suturing the wound in the annulus fibrosus during minimally invasive surgery can be achieved. However, for the stapler adopting this scheme, the stakes are prone to detach from the annulus fibrosus, resulting in suture failure.

[0004] It can be seen that the staplers in the related art have the technical problem that the suture is not firm because the wire ends are prone to detach from the tissue. There is currently no effective solution to this technical problem. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a stapler to solve the technical problem that the suture is not firm because the wire ends of the stapler in the related art are prone to detach from the tissue.

[0006] To achieve the above purpose, the utility model provides a stapler, including: a first puncture needle, the first puncture needle being of a hollow structure; a first suture assembly, the first suture assembly including a first suture and a fixing member, the fixing member being fixedly arranged at one end of the first suture, at least part of the fixing member being made of a deformable material, the fixing member having a contracted state and an extended state, when the fixing member is in the contracted state, the fixing member can be accommodated in the cavity of the first puncture needle, when the fixing member is withdrawn from the first puncture needle, at least part of the fixing member extends radially along the first suture to enable the fixing member to return to the extended state; a pushing part, at least part of the pushing part being arranged in the cavity of the first puncture needle, the pushing part being movably arranged along the length direction of the first puncture needle to push the fixing member out of the first puncture needle.

[0007] Furthermore, at least part of the fixing member is made of a shape memory material.

[0008] Furthermore, at least part of the fixing member is made of a nickel-titanium memory alloy.

[0009] Furthermore, the fixing member includes a main body portion and a protruding portion. The protruding portion is connected to the main body portion and is bendably arranged relative to the main body portion so that the fixing member has a contracted state and an extended state.

[0010] Furthermore, along the length direction of the first suture, the bending direction of the protruding portion faces the first suture.

[0011] Furthermore, there are a plurality of protruding portions, and the plurality of protruding portions are arranged at intervals along the circumferential direction of the first suture.

[0012] Furthermore, the stapler further includes a second suture assembly. The second suture assembly includes a bone nail and a second suture. The bone nail is fixedly arranged at one end of the second suture, and the bone nail is used for fixedly installing on bone tissue.

[0013] Furthermore, the stapler further includes a second puncture needle. The second puncture needle has a hollow structure, and the bone nail can be accommodated in the cavity of the second puncture needle.

[0014] Furthermore, the outer surface of the bone nail is provided with threads. The stapler further includes a bone nail installation member. At least part of the bone nail installation member can be inserted into the cavity of the second puncture needle to drive the bone nail to screw into the bone tissue through the bone nail installation member.

[0015] Furthermore, the stapler includes a handheld portion. The first puncture needle is installed on the handheld portion. The handheld portion has a firing structure, and the firing structure is in transmission connection with the pushing portion to drive the pushing portion to move along the length direction of the first puncture needle through the firing structure.

[0016] The stapler applying the technical solution of the present utility model includes: a first puncture needle, a first suture assembly, and a pushing portion. The first puncture needle has a hollow structure; the first suture assembly includes a first suture and a fixing member. The fixing member is fixedly arranged at one end of the first suture, and at least part of the fixing member is made of a deformable material. The fixing member has a contracted state and an extended state. When the fixing member is in the contracted state, the fixing member can be accommodated in the cavity of the first puncture needle. When the fixing member is taken out from the first puncture needle, at least part of the fixing member extends along the radial direction of the first suture, so that the fixing member returns to the extended state; at least part of the pushing portion is arranged in the cavity of the first puncture needle, and the pushing portion is movably arranged along the length direction of the first puncture needle to push the fixing member out of the first puncture needle. For the stapler with such a structural design, during use, first, the fixing member is contracted to the contracted state, then the fixing member of the first suture assembly and a part of the first suture are placed in the cavity of the first puncture needle, and then the first puncture needle is punctured to reach the part to be sutured. The fixing member is pushed out of the first puncture needle through the pushing portion. After the fixing member detaches from the first puncture needle, it extends along the radial direction of the first suture, thus switching to the extended state. Along the radial direction of the first suture, the size of the fixing member becomes larger. Therefore, a more stable anchoring effect can be achieved, enabling the first suture assembly to be firmly fixed at the tissue to be sutured. Then, by operating on the first suture, such as tying a plurality of first sutures together, the suturing of the affected tissue can be realized. Compared with the stapler in the related art, the first suture assembly of the stapler in the embodiment of the present utility model can be more reliably fixed at the place to be sutured, greatly reducing the risk of suture detachment, and solving the technical problem that the stapler in the related art is not firmly sutured because the wire end is easily detached from the tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0018] Figure 1 is a schematic diagram of an embodiment of the stapler of the present utility model when the fixing member is in the contracted state;

[0019] Figure 2 is a schematic diagram of an embodiment of the stapler of the present utility model when the fixing member is in the extended state;

[0020] Figure 3 is a schematic diagram of the related structure of the second suture assembly of an embodiment of the stapler of the present utility model;

[0021] Figure 4 is a schematic diagram of the external structure of an embodiment of the stapler of the present utility model.

[0022] Among them, the above-mentioned drawings include the following reference numerals:

[0023] 1. First puncture needle; 2. First suture assembly; 21. First suture; 22. Fixing member; 221. Protrusion; 3. Handheld part; 31. Actuating structure; 4. Second suture assembly; 41. Bone nail; 42. Second suture; 5. Second puncture needle. Detailed implementation manners

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0025] Please refer to Figures 1 to 4 , the present utility model provides a stapler, including: a first puncture needle 1, the first puncture needle 1 is a hollow structure; a first suture assembly 2, the first suture assembly 2 includes a first suture 21 and a fixing member 22, the fixing member 22 is fixedly arranged at one end of the first suture 21, at least part of the fixing member 22 is made of a deformable material, the fixing member 22 has a contracted state and an extended state, when the fixing member 22 is in the contracted state, the fixing member 22 can be accommodated in the cavity of the first puncture needle 1, when the fixing member 22 is withdrawn from the first puncture needle 1, at least part of the fixing member 22 extends radially along the first suture 21, so that the fixing member 22 returns to the extended state; a pushing part, at least part of the pushing part is arranged in the cavity of the first puncture needle 1, the pushing part is movably arranged along the length direction of the first puncture needle 1 to push the fixing member 22 out of the first puncture needle 1.

[0026] For the stapler with this structural design, during use, first, the fixing member 22 is contracted to the contracted state, then the fixing member 22 of the first suture assembly 2 and a part of the first suture 21 are placed in the cavity of the first puncture needle 1, and then the first puncture needle 1 is punctured to reach the part to be sutured. The fixing member 22 is pushed out of the first puncture needle 1 through the pushing part. After the fixing member 22 is separated from the first puncture needle 1, it extends radially along the first suture 21, so as to switch to the extended state. Along the radial direction of the first suture 21, the size of the fixing member 22 becomes larger, so that a more stable anchoring effect can be achieved, and the first suture assembly 2 is firmly fixed at the tissue to be sutured. Then, by operating on the first suture 21, for example, tying a plurality of first sutures 21 together, the suture of the affected tissue can be realized. Compared with the stapler in the related art, the first suture assembly 2 of the stapler in the embodiment of the present utility model can be more reliably fixed at the part to be sutured, and the risk of suture detachment can be greatly reduced, solving the technical problem that the stapler in the related art is not firmly sutured due to the easy detachment of the thread end from the tissue.

[0027] In actual use, two staplers or multiple staplers can be used together. For example, a first suture 21 is led out through a stapler on each side of the wound, and the two first sutures 21 are tied together. The stapler according to the embodiment of the present invention can send the fixing member 22 to the wound for fixation through the first puncture needle 1, and then the wound can be sutured by operating the first suture 21 outside the body, which is particularly suitable for use in minimally invasive surgery with small holes. In actual use, according to the different positions of the wound, the stapler can also be used to suture various tissues. For example, for a patient with lumbar disc herniation, the tear in the annulus fibrosus can be sutured. Only the first suture assembly 2 needs to be inserted through the above-mentioned stapler on both sides of the tear, so that the first sutures 21 are led out on both sides of the wound respectively, and by tying the two first sutures, the suture of the tear in the annulus fibrosus can be achieved.

[0028] As described above, in actual implementation, the fixing member 22 only needs to have the ability to deform, so that it can expand after being placed in the tissue, and increasing the contact area with the tissue can play a role in improving the suture firmness.

[0029] In one embodiment, at least part of the fixing member 22 is made of a shape memory material. In this embodiment, at least part of the fixing member 22 is made of a shape memory material, so that after it is placed in the tissue, under the action of the characteristics of the material itself, it can return to the expanded state, ensuring the reliability of the connection with the tissue and being more convenient and reliable to use.

[0030] Preferably, at least part of the fixing member 22 is made of a nickel-titanium memory alloy. In this preferred embodiment, at least part of the fixing member 22 is made of a nickel-titanium memory alloy, which is harmless to the human body and has excellent shape memory characteristics, elasticity, corrosion resistance and other characteristics, and can well realize the suture of human tissues. And because it belongs to a relatively hard metal material, it can also be used in tissue environments such as cortical bone. When it is implanted into bone tissue, it can form a relatively stable rigid fit with the bone tissue to prevent the fixing member 22 from slipping out of the bone tissue, thereby achieving a reliable fixing effect. For example, in a patient with lumbar disc herniation, if the rupture position of the annulus fibrosus is close to the vertebral body, at this time, one side of the tear in the annulus fibrosus is the soft tissue of the annulus fibrosus, and the other side of the tear is the bone tissue. At this time, the fixing member 22 made of the above-mentioned nickel-titanium memory alloy material can achieve a reliable fixing effect after being implanted into the soft tissue or bone tissue.

[0031] In actual implementation, the shape of the fixing member 22 can adopt various designs, such as circular, square, triangular, star-shaped or irregular shapes, etc., as long as it can expand radially along the first suture 21 when it expands.

[0032] In an alternative embodiment, the fixing member 22 includes a body portion and a protruding portion 221. The protruding portion 221 is connected to the body portion and is bendably arranged relative to the body portion so that the fixing member 22 has a contracted state and an extended state.

[0033] In this embodiment, the fixing member 22 includes a body portion and a protruding portion 221. The protruding portion 221 is bendable relative to the body portion, so that the fixing member 22 can switch between a contracted state and an extended state.

[0034] Preferably, along the length direction of the first suture 21, the bending direction of the protruding portion 221 faces the first suture 21.

[0035] With this arrangement, the protruding portion 221 can form a structure similar to a hook claw, which can be more stably connected to the tissue, further providing a fixing effect between the fixing member 22 and the tissue to be sutured. In this embodiment, when the fixing member 22 is in the contracted state, the angle between the protruding portion 221 and the body portion is smaller, and when the fixing member 22 is in the extended state, the angle between the protruding portion 221 and the body portion is larger.

[0036] Specifically, there are a plurality of protruding portions 221, and the plurality of protruding portions 221 are arranged at intervals along the circumferential direction of the first suture 21.

[0037] In this embodiment, there are a plurality of protruding portions 221, and the plurality of protruding portions 221 are arranged at intervals along the circumferential direction of the first suture 21. During the contraction and extension process, the body portion and the plurality of protruding portions 221 form a structure similar to an umbrella skeleton, and compared with the fixing member 22 of other structural forms, its fixing effect is better.

[0038] During the actual operation process, for the situation where both sides of the wound are soft tissues, such as the case where the annulus fibrosus in a patient with lumbar disc herniation ruptures in the middle, the stapler with the above structural design can effectively drive the fixing member 22 into and fix it in the soft tissues on both sides of the wound, realizing the fixation of the first suture 21 and the wound suture. For the situation where one side of the wound is soft tissue and the other side is bone tissue, such as the case where the annulus fibrosus in a patient with lumbar disc herniation ruptures near the vertebral body, at this time, the stapler with a conventional structural design can only effectively drive the first suture assembly 2 into the soft tissue side, and it is difficult to effectively fix the suture on the bone tissue side. In the embodiment of the present application, in addition to using the fixing member 22 made of nickel-titanium memory alloy as described above to realize the fixation with bone tissue, another solution can also be adopted to realize the connection between the suture and the bone tissue. Specifically, the stapler in this embodiment may further include a second suture assembly 4. The second suture assembly 4 includes a bone nail 41 and a second suture 42. The bone nail 41 is fixedly arranged at one end of the second suture 42, and the bone nail 41 is used for fixedly mounting on the bone tissue.

[0039] With this structural design, the bone nail 41 of the second suture assembly 4 can conveniently and effectively fix the second suture 42 on the bone tissue, and then tie it with the first suture 21 led out from the other side of the wound, so as to effectively achieve the suturing of the wound.

[0040] As Figure 3 shown, in this embodiment, the stapler further includes a second puncture needle 5. The second puncture needle 5 has a hollow structure, and the bone nail 41 can be accommodated in the cavity of the second puncture needle 5.

[0041] By designing the second puncture needle 5 and placing the bone nail 41 in the cavity of the second puncture needle 5, the bone nail 41 can be conveniently sent to the affected area through the second puncture needle 5, which is beneficial to realizing the wound suturing under minimally invasive surgery with a small aperture.

[0042] In an optional structure, the outer surface of the bone nail 41 is provided with threads. The stapler further includes a bone nail mounting member, and at least a part of the bone nail mounting member can be inserted into the cavity of the second puncture needle 5 to drive the bone nail 41 to screw into the bone tissue through the bone nail mounting member.

[0043] The stapler includes a handheld part 3. The first puncture needle 1 is installed on the handheld part 3. The handheld part 3 has a firing structure 31, and the firing structure 31 is in transmission connection with the pushing part to drive the pushing part to move along the length direction of the first puncture needle 1 through the firing structure 31. In actual implementation, the firing structure can be in various forms, such as a trigger, a button, a push rod, a knob, etc. Its specific firing form can also have different ways, such as manual drive firing, electric drive firing, etc.

[0044] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0045] The stapler of the present utility model includes: a first puncture needle 1, a first suture assembly 2 and a pushing part. The first puncture needle 1 has a hollow structure; the first suture assembly 2 includes a first suture 21 and a fixing member 22. The fixing member 22 is fixedly arranged at one end of the first suture 21, and at least part of the fixing member 22 is made of a deformable material. The fixing member 22 has a contracted state and an extended state. When the fixing member 22 is in the contracted state, the fixing member 22 can be accommodated in the cavity of the first puncture needle 1. When the fixing member 22 is withdrawn from the first puncture needle 1, at least part of the fixing member 22 extends radially along the first suture 21, so that the fixing member 22 returns to the extended state; at least part of the pushing part is arranged in the cavity of the first puncture needle 1, and the pushing part is movably arranged along the length direction of the first puncture needle 1 to push the fixing member 22 out of the first puncture needle 1. For the stapler designed with this structure, during use, first, the fixing member 22 is contracted to the contracted state, then the fixing member 22 of the first suture assembly 2 and a part of the first suture 21 are placed in the cavity of the first puncture needle 1, and then the first puncture needle 1 is punctured to reach the part to be sutured. The fixing member 22 is pushed out of the first puncture needle 1 through the pushing part. After the fixing member 22 is separated from the first puncture needle 1, it extends radially along the first suture 21, so as to switch to the extended state. Along the radial direction of the first suture 21, the size of the fixing member 22 becomes larger, so that a more stable anchoring effect can be achieved, and the first suture assembly 2 is firmly fixed at the tissue to be sutured. Then, by operating on the first suture 21, for example, tying a plurality of first sutures 21 together, the suture of the affected tissue can be realized. Compared with the stapler in the related art, the first suture assembly of the stapler in the embodiment of the present utility model can be more reliably fixed at the part to be sutured, and the risk of suture detachment can be greatly reduced, solving the technical problem that the stapler in the related art is not firmly sutured due to the easy detachment of the thread end from the tissue.

[0046] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "above" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0049] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A stapler, characterized in that, Comprising: A first puncture needle (1), the first puncture needle (1) being of a hollow structure; A first suture assembly (2), the first suture assembly (2) comprising a first suture (21) and a fixing member (22), the fixing member (22) being fixedly arranged at one end of the first suture (21), at least part of the fixing member (22) being made of a deformable material, the fixing member (22) having a contracted state and an extended state, when the fixing member (22) is in the contracted state, the fixing member (22) can be accommodated in the cavity of the first puncture needle (1), when the fixing member (22) is withdrawn from the first puncture needle (1), at least part of the fixing member (22) extends radially along the first suture (21) so that the fixing member (22) returns to the extended state; A pushing part, at least part of the pushing part being arranged in the cavity of the first puncture needle (1), the pushing part being movably arranged along the length direction of the first puncture needle (1) to push the fixing member (22) out of the first puncture needle (1).

2. The stapler according to claim 1, wherein, At least part of the fixing member (22) is made of a shape memory material.

3. The stapler according to claim 1, wherein, At least part of the fixing member (22) is made of a nickel-titanium memory alloy.

4. The stapler according to claim 1, wherein The fixing member (22) comprises a body part and a convex part (221), the convex part (221) being connected to the body part, the convex part (221) being bendably arranged relative to the body part so that the fixing member (22) has the contracted state and the extended state.

5. The stapler according to claim 4, wherein Along the length direction of the first suture (21), the bending direction of the convex part (221) faces the first suture (21).

6. The stapler according to claim 4, characterized in that, The convex part (221) is plural, and the plural convex parts (221) are arranged at intervals along the circumferential direction of the first suture (21).

7. The stapler according to claim 1, wherein The stapler further comprises a second suture assembly (4), the second suture assembly (4) comprising a bone nail (41) and a second suture (42), the bone nail (41) being fixedly arranged at one end of the second suture (42), the bone nail (41) being used for being fixedly installed in bone tissue.

8. The stapler according to claim 7, characterized in that, The stapler further comprises a second puncture needle (5), the second puncture needle (5) being of a hollow structure, the bone nail (41) being able to be accommodated in the cavity of the second puncture needle (5).

9. The stapler according to claim 8, wherein, The outer surface of the bone nail (41) is provided with threads, the stapler further comprises a bone nail installation member, at least part of the bone nail installation member being able to be inserted into the cavity of the second puncture needle (5) to drive the bone nail (41) to screw into bone tissue through the bone nail installation member.

10. The stapler according to any one of claims 1 to 9, characterized in that, The stapler comprises a handheld part (3), the first puncture needle (1) being installed on the handheld part (3), the handheld part (3) having a firing structure (31), the claims The firing structure (31) is in transmission connection with the pushing part to drive the pushing part to move along the length direction of the first puncture needle (1) through the firing structure (31).

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