Single-line lumbar intervertebral disc fibrous ring crevasse suture needle convenient for recovering suture needle

Abstract

The invention provides a single-line lumbar intervertebral disc fibrous ring crevasse suture needle convenient for recovering a suture needle, and belongs to the technical field of medical apparatuses and instruments. According to the suture needle, through the structural design that the suture needle is in a J shape in a natural state, has elasticity, is in a linear shape under the action of external force and naturally rebounds to be in a J shape after the external force is eliminated, the problems that in the prior art, when a medical worker uses two needle pushing rods, a non-magnetic needle pushing rod and a magnetic needle pushing rod are likely to be confused, and use is not convenient enough are solved. The suture needle comprises a screw head, a screw sleeve rod, a suture needle, a suture needle sleeve, a first needle pushing rod, a suture line and a needle holder, the suture needle comprises a needle tail and a needle tip, the suture needle is J-shaped in a natural state, and the needle tip is located at the hook end; the suture needle has elasticity, is in a linear shape under the action of external force, and naturally rebounds to be in a J shape after the external force is eliminated. And the needle holder is used for clamping the needle tip under the visual field of the endoscope.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a single-thread suture needle for lumbar intervertebral disc annulus fibrosus rupture that is easy to retrieve. Background Technology

[0002] Chinese invention patent application CN119587094A describes a single-thread suture needle for suturing ruptures in the annulus fibrosus of the lumbar intervertebral disc. This involves the engagement of a screw sleeve and screw head, and a suture needle sleeve and suture needle. The two ends of a barbed suture are then fixed to the screw head and suture needle, respectively. When using this needle, medical personnel first insert the screw head into the bone surface on one side of the annulus fibrosus rupture, then detach the screw head axially from the screw sleeve. The suture needle is then inserted from one side of the annulus fibrosus rupture to the other, completing the suturing. Compared to the lumbar intervertebral disc annulus fibrosus rupture suture needle described in Chinese utility model patent application CN221013356U, which uses two sutures and requires a slipknot for the suture fixed to the screw head, the suture needle described in Chinese invention patent application CN119587094A is not only simpler to operate but also provides a more secure suture.

[0003] However, the suture needle described in Chinese invention patent application publication number CN119587094A is "I" shaped. When the suture needle and suture cannula separate and pass through the soft tissue side of the annulus fibrosus tear, the suture needle will directly adhere to the soft tissue side. Therefore, it is difficult for medical staff to use common medical instruments (such as needle holders, nucleus pulposus forceps, etc.) to pull the suture to tighten the suture. It is also difficult to directly retrieve the suture needle with common medical instruments after suturing is completed.

[0004] For the reasons mentioned above, Chinese invention patent application CN119587094A designed a non-magnetic first pusher rod and a magnetic second pusher rod, with a hollow needle sheath. During suturing of annulus fibrosus tears, the first pusher rod pushes the needle out of the needle sheath to pass through the soft tissue side of the annulus fibrosus tear. Then, the first pusher rod is withdrawn from the needle sheath, and the second pusher rod is slidably installed inside the needle sheath and pushed to the bottom. The second pusher rod magnetically attracts the needle, pulling it to tighten the suture. After the suture with barbs closes the tear, the connection between the needle and the suture is cut. The needle is then retracted using the magnetism of the second pusher rod. Throughout the process, the first and second pusher rods are used alternately, and the second pusher rod must be magnetic. Although it is easier to operate and safer than structures that use clamps to pull out the "I"-shaped suture from the outside of the suture cannula, the design of two needle pushers, one of which must be magnetic, not only increases the cost of equipment procurement, but also makes it easy for medical staff to confuse the non-magnetic and magnetic needle pushers, making it still not convenient to use. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a single-thread lumbar intervertebral disc annulus fibrosus suture needle that facilitates needle retrieval, in order to solve the problem in the prior art, in order to pull the needle to tighten the suture, Chinese invention patent application publication number CN119587094A, which has two needle push rods, one of which must be magnetic, resulting in high procurement costs and the inconvenience of use due to the easy confusion between the non-magnetic and magnetic needle push rods by medical staff.

[0006] To achieve the above and other related objectives, the present invention provides a single-thread suture needle for suturing ruptures of the annulus fibrosus of the intervertebral disc that facilitates needle retrieval, comprising:

[0007] The screw head is made of a biocompatible material;

[0008] A screw sleeve is circumferentially fixedly connected to the screw head and can be axially detached from the screw head.

[0009] The sewing needle, including the needle tail and the needle tip, is naturally shaped like a "J", with the needle tip located at the hook end; the sewing needle is elastic, and under the action of external force, it is shaped like a "I" and after the external force is removed, it naturally springs back into a "J" shape;

[0010] A needle sleeve with a hollow structure, wherein the needle is circumferentially fixed inside the needle sleeve and can detach from the needle sleeve axially, and the needle tip detaches from the needle sleeve before the needle tail.

[0011] The first pusher rod is slidably installed inside the needle sleeve, pushing the needle to disengage from the needle sleeve axially.

[0012] A suture, one end of which is fixed to the screw head and the other end of which is fixed to the needle, and the suture is provided with barbs;

[0013] A needle holder that holds the needle tip under endoscopic visualization.

[0014] Optionally, a first handle is provided on the screw sleeve, a second handle is provided on the needle sleeve, and a third handle is provided on the first needle pusher.

[0015] After the first pusher rod pushes the suture needle axially away from the suture needle sleeve, the third handle and the top end of the suture needle sleeve abut against each other.

[0016] Optionally, the first handle and the screw sleeve are integrally formed, the second handle and the needle sleeve are integrally formed, and the third handle and the first push needle rod are integrally formed.

[0017] Optionally, the end of the screw head that mates with the screw sleeve has a protrusion, and the end of the screw sleeve that mates with the screw head has a groove that mates with the protrusion.

[0018] Optionally, the protrusion is a retaining plate, and the groove is a slot that mates with the retaining plate.

[0019] Optionally, the protrusion is hexagonal in shape, and the groove is an internal hexagonal hole.

[0020] Optionally, one end of the suture is fixed to the top of the screw head, and the other end of the suture is fixed to the needle tail.

[0021] Optionally, the clamping part of the needle holder is provided with meshing teeth.

[0022] As described above, the single-thread lumbar intervertebral disc annulus fibrosus suture needle of the present invention, which facilitates needle retrieval, has at least the following beneficial effects:

[0023] This single-thread lumbar intervertebral disc annulus fibrosus suture needle, designed for easy needle retrieval, features a needle consisting of a needle tail and a needle tip. In its natural state, the needle is J-shaped with the needle tip at the hook end. The needle is elastic, initially forming a straight line under external force, but naturally springs back to a J-shape after the force is removed. This design allows medical personnel to insert the J-shaped needle into a hollow needle sleeve when suturing the annulus fibrosus rupture. Under the force of the inner wall of the needle sleeve, the J-shaped needle initially forms a straight line. Then, the medical personnel slide the first push rod into the needle sleeve and drive it to push the needle tail. The needle tip first emerges from the needle sleeve, passes through the soft tissue side of the annulus fibrosus rupture, and finally, the entire needle is pushed out of the needle sleeve, returning to a J-shape.

[0024] Compared to sutures that maintain a straight "I" shape, the tip of this "J"-shaped suture can detach from the soft tissue side of the annulus fibrosus tear, unlike sutures that remain in a straight "I" shape and adhere to the tissue side. This allows medical staff to use a needle holder to hold the needle tip under endoscopic guidance, pulling the entire suture to tighten the barbed suture and suture the annulus fibrosus tear of the lumbar intervertebral disc. The needle holder can then be used to retrieve the suture. Unlike the Chinese invention patent application CN119587094A, which requires two push rods, one of which must be magnetic, this design reduces equipment procurement costs. Furthermore, medical staff will not confuse the non-magnetic and magnetic push rods when using this suture needle, and it is more convenient to use the needle holder to hold the needle tip and tighten the barbed suture under endoscopic guidance. Attached Figure Description

[0025] Figure 1 The diagram shows a single-thread suture needle for suturing ruptures of the annulus fibrosus of the lumbar intervertebral disc, which facilitates needle retrieval according to the present invention.

[0026] Figure 2 The diagram shows the screw head, suture, and needle of the present invention.

[0027] Figure 3 The diagram shows two states of the suture needle: one when it is extended from the suture tube and the other when it is retracted into the suture tube.

[0028] Component designation explanation

[0029] Screw head 1;

[0030] Screw sleeve 2, first handle 21;

[0031] Needle 3, needle tip 31, needle tail 32;

[0032] 4. Needle sleeve; 41. Second handle; 42. Thread groove.

[0033] 5 stitches, 51 barbs;

[0034] First pusher rod 6, third handle 61;

[0035] Needle holder 7, clamping part 71, water inlet 72. Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0037] Please see Figures 1 to 3 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0038] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0039] This invention provides a single-thread suture needle for lumbar intervertebral disc annulus fibrosus rupture that facilitates needle retrieval, comprising:

[0040] like Figure 1 and Figure 2 The screw head 1 shown is inserted into the bone surface on one side of the annulus fibrosus tear during surgery. Since the screw head 1 remains in the bone surface after surgery, the material of the screw head 1 should be a biocompatible material, such as polyetheretherketone (PEEK), bioactive ceramics, and polymethyl methacrylate (PMMA), etc., which will not be listed here.

[0041] like Figure 1 The screw sleeve 2 shown is solid or hollow because the stitching 5 does not need to pass through it. The screw sleeve 2 is circumferentially fixed to the screw head 1 and can be axially detached from the screw head 1.

[0042] like Figure 2 and Figure 3The sewing needle 3 shown includes a needle tail 32 and a needle tip 31. In its natural state, it is J-shaped, and the needle tip 31 is located at the hook end. The sewing needle 3 is elastic. Under the action of external force, it is straight and naturally rebounds into a J-shape after the external force is removed. The sewing needle 3 can be made of elastic metal material.

[0043] like Figure 1 and Figure 3 The needle sleeve 4 shown is a hollow structure. The needle 3 is circumferentially fixed inside the needle sleeve 4 and can be detached from the needle sleeve 4 axially. The needle tip 31 of the needle 3 detaches from the needle sleeve 4 before the needle tail 32.

[0044] like Figure 1 and Figure 3 The first pusher rod 6 shown is slidably installed inside the needle sleeve 4, pushing the needle 3 to detach from the needle sleeve 4 axially.

[0045] like Figure 1 and Figure 2 The suture 5 shown has one end fixed to the screw head 1 and the other end fixed to the needle 3. The suture 5 has barbs 51 with the tail of the barbs pointing towards the screw head 1, so that the suture 55 guided by the needle 3 can smoothly penetrate the annulus fibrosus and suture the annulus fibrosus tear.

[0046] like Figure 1 The needle holder 7 shown holds the tip 31 of the suture needle 3 under the endoscopic view.

[0047] like Figures 1 to 3 As shown, the specific steps of this suture needle during operation, based on the above structural design, are as follows:

[0048] S1: Medical staff first align the tail 32 of the "J"-shaped suture needle 3 with the bottom end of the suture needle sleeve 4, and then gradually insert it. The tail 32 to the tip 31 gradually enter the suture needle sleeve 4. The "J"-shaped suture needle 3 forms a straight line inside the suture needle sleeve 4. The reason why the suture needle 3 is not always inserted into the suture needle sleeve 4 is to prevent the "J"-shaped suture needle 3 from losing its elasticity after being subjected to force for a long time.

[0049] S2: The medical staff inserts the screw head 1 into the bone surface on one side of the annulus fibrosus tear, and then makes the screw head 1 detach from the screw sleeve 2 axially. Then, the first pusher rod 6 is slid into the top of the needle sleeve 4 and pushes the needle 3 to gradually detach from the needle sleeve 4 axially. At the same time, the needle tip 31 passes through the soft tissue side of the annulus fibrosus tear to the other side during the pushing process of the first pusher rod 6, until the entire needle 3 is detached from the needle sleeve 4. Under the action of its own elasticity, the needle 3 detached from the needle sleeve 4 returns to the "J" shape from the "I" shape.

[0050] S3: Under endoscopic guidance, medical staff use needle holder 7 to clamp the needle tip 31 that has detached from the soft tissue side of the annulus fibrosus tear, and then pull the entire needle 3. The needle 3 pulls the suture 5 with barbs 51 and tightens it in the soft tissue of the annulus fibrosus. The suture 5 tightened in the soft tissue of the annulus fibrosus will no longer slip, thus firmly suturing the two sides of the annulus fibrosus together. Finally, the connection between the needle 3 and the suture 5 is cut, and under endoscopic guidance, the medical staff use needle holder 7 to retrieve the needle 3.

[0051] Therefore, compared to the straight-line suture needle 3, the tip 31 of the "J"-shaped suture needle 3 can detach from the soft tissue side of the annulus fibrosus tear, unlike the straight-line suture needle 3 which adheres to the tissue side. In this way, medical staff can use the needle holder 7 to hold the needle tip 31 under endoscopic vision, and then pull the entire suture needle 3 to tighten the suture 5 with barbs 51 to suture the annulus fibrosus tear of the lumbar intervertebral disc, and then use the needle holder 7 to retrieve the suture needle 3. Unlike the Chinese invention patent application with publication number CN119587094A, which requires two needle pushers, one of which must be magnetic, this design naturally reduces the cost of equipment procurement. At the same time, medical staff will not confuse the non-magnetic and magnetic needle pushers when using this suture needle, and it is also more convenient to use the needle holder 7 to hold the needle tip 31 and tighten the suture 5 with barbs 51 under endoscopic vision.

[0052] It should also be noted that Figure 3 The needle sleeve 4 shown in the diagram has a channel that is wider at the top and narrower at the bottom, and the first needle pusher 6 is thicker at the top and thinner at the bottom. This is just one design method. The channel inside the needle sleeve 4 can be designed as a through channel of the same width and the diameter of the first needle pusher 6 can also be designed as the same. This will not be elaborated here.

[0053] In another implementation, please refer to Figure 1 and Figure 3 The screw sleeve 2 is provided with a first handle 21, the suture needle sleeve 4 is provided with a second handle 41, and the first needle pusher 6 is provided with a third handle 61; to facilitate the operation of medical staff, the first handle 21, the second handle 41 and the third handle 61 can be engraved with anti-slip texture.

[0054] At the same time, after the first push rod 6 pushes the suture needle 3 to detach from the suture needle sleeve 4 along the axis, the third handle 61 abuts against the top of the suture needle sleeve 4, thereby making it easier for medical staff to grasp the position and timing of pushing out the suture needle 3.

[0055] In another implementation, please refer to Figure 1 and Figure 3The first handle 21 and the screw sleeve 2 are integrally formed, the second handle 41 and the needle sleeve 4 are integrally formed, and the third handle 61 and the first push needle rod 6 are integrally formed; thus ensuring the structural stability of the screw sleeve 2, the needle sleeve 4 and the first push needle rod 6.

[0056] In another embodiment, the end of the screw head 1 that mates with the screw sleeve 2 has a protrusion, and the end of the screw sleeve 2 that mates with the screw head 1 has a groove that mates with the protrusion; as described in paragraphs 0045-0046 of the specification of the Chinese utility model patent CN221013356U, a lumbar intervertebral disc annulus fibrosus suture needle, the protrusion can be a retaining plate, and the corresponding groove is a retaining groove that mates with the retaining plate; or the protrusion can be hexagonal in shape, and the groove can be an internal hexagonal hole, which will not be elaborated here.

[0057] In another implementation, please refer to Figure 2 One end of the suture 5 is fixed to the top of the screw head 1, and the other end of the suture 5 is fixed to the needle tail 32 of the needle 3. Compared with other parts of the screw head 1 and the needle 3, the suture 5 is more convenient to sew. Furthermore, one end of the suture 5 can be fixed to the top center of the screw head 1, and the other end of the suture 5 can be fixed to the top center of the needle tail 32.

[0058] In another implementation, please refer to Figure 3 The bottom end of the needle sleeve 4 is provided with a thread groove 42. The needle 3 is installed inside the needle sleeve 4. The suture 5 is connected to the side of the needle tail 32 and is engaged in the thread groove 42 in the circumferential direction. During the process of the needle 3 leaving the needle sleeve 4, the suture 5 can slide along the thread groove 42 inside the needle sleeve 4. At the same time, the suture 5 is engaged in the thread groove 42 in the circumferential direction, so as to prevent the needle 3 from rotating, so as to control the needle tip 31's insertion direction.

[0059] In other implementations, such as Figure 1 As shown, the needle holder 7 is based on the nucleus pulposus forceps used in endoscopic surgery in the prior art. The distal end of the nucleus pulposus forceps is modified to be the same as the distal end structure of the needle holder 7 used in gross surgery, and the size of the distal end structure is reduced. At the same time, the clamping part 71 of the needle holder 7 is provided with fine meshing teeth to ensure stable gripping of the suture needle 3. Furthermore, the needle holder 7 is provided with a water inlet 72 to facilitate cleaning of the needle holder 7.

[0060] In summary, this invention utilizes a suture needle 3 comprising a needle tail 32 and a needle tip 31. The suture needle 3 is J-shaped in its natural state, with the needle tip 31 located at the hook end. The suture needle 3 is elastic, forming a straight line under external force and naturally rebounding into a J-shape after the force is removed. Compared to a suture needle 3 that always maintains a straight line shape, the needle tip 31 of this J-shaped suture needle 3 can detach from the soft tissue side of the fibrous ring tear, unlike a suture needle 3 that always maintains a straight line shape and remains attached to the tissue side. This allows medical personnel to use a needle holder 7 to grasp the needle tip 31 under endoscopic visualization, thereby pulling the entire suture needle. The suture needle 3 tightens the barbed suture 5 to suture the ruptured annulus fibrosus of the lumbar intervertebral disc, and the needle holder 7 is used to retrieve the suture needle 3. Unlike the Chinese invention patent application CN119587094A, which requires two push rods, one of which must be magnetic, this invention reduces equipment procurement costs. Furthermore, medical personnel using this suture needle do not need to confuse the non-magnetic and magnetic push rods. Using the needle holder 7 to hold the needle tip 31 and tighten the barbed suture 5 under endoscopic guidance is also more convenient. Therefore, this invention effectively overcomes the shortcomings of the prior art and has high industrial application value.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A single-thread suture needle for suturing ruptures of the annulus fibrosus of the intervertebral disc, characterized in that, include: The screw head is made of a biocompatible material; A screw sleeve is circumferentially fixedly connected to the screw head and can be axially detached from the screw head. The sewing needle, including the needle tail and the needle tip, is naturally shaped like a "J", with the needle tip located at the hook end; the sewing needle is elastic, and under the action of external force, it is shaped like a "I" and after the external force is removed, it naturally springs back into a "J" shape; A needle sleeve with a hollow structure, wherein the needle is circumferentially fixed inside the needle sleeve and can detach from the needle sleeve axially, and the needle tip detaches from the needle sleeve before the needle tail. The first pusher rod is slidably installed inside the needle sleeve, pushing the needle to disengage from the needle sleeve axially. A suture, one end of which is fixed to the screw head and the other end of which is fixed to the needle, the suture being provided with barbs, the tail of which points towards the screw head; A needle holder that holds the needle tip under endoscopic visualization.

2. The single-thread lumbar intervertebral disc annulus fibrosus suture needle for easy needle retrieval according to claim 1, characterized in that: The screw sleeve is provided with a first handle, the needle sleeve is provided with a second handle, and the first push needle rod is provided with a third handle. After the first pusher rod pushes the suture needle axially away from the suture needle sleeve, the third handle and the top end of the suture needle sleeve abut against each other.

3. A single-thread lumbar intervertebral disc annulus fibrosus suture needle for easy needle retrieval according to claim 2, characterized in that: The first handle and the screw sleeve are integrally formed, the second handle and the needle sleeve are integrally formed, and the third handle and the first push needle rod are integrally formed.

4. A single-thread lumbar intervertebral disc annulus fibrosus suture needle for easy needle retrieval according to claim 1, characterized in that: The end of the screw head that mates with the screw sleeve has a protrusion, and the end of the screw sleeve that mates with the screw head has a groove that mates with the protrusion.

5. A single-thread lumbar intervertebral disc annulus fibrosus suture needle for easy needle retrieval according to claim 4, characterized in that: The protrusion is a retaining plate, and the groove is a slot that mates with the retaining plate.

6. A single-thread lumbar intervertebral disc annulus fibrosus suture needle for easy needle retrieval according to claim 4, characterized in that: The protrusion is in the shape of a regular hexagon, and the groove is an internal hexagonal hole.

7. A single-thread lumbar intervertebral disc annulus fibrosus suture needle for easy needle retrieval according to claim 1, characterized in that: One end of the suture is fixed to the top of the screw head, and the other end of the suture is fixed to the needle tail.

8. A single-thread lumbar intervertebral disc annulus fibrosus suture needle for easy needle retrieval according to claim 1, characterized in that: The clamping part of the needle holder is provided with meshing teeth.

9. A single-thread lumbar intervertebral disc annulus fibrosus suture needle for easy needle retrieval according to claim 7, characterized in that: The bottom end of the needle sleeve is provided with a thread groove, the needle is installed inside the needle sleeve, and the suture is connected to the side of the needle tail and engaged in the thread groove in the circumferential direction.

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