Lumbar annulus fibrosus repairing system
By designing the lumbar annular repair system, the radial through hole of the first anchor and the coordination of the fixed shaft, flat suture and inserter, the suture rotation problem is solved, and the stable fixation of sutures on the bone structure is achieved, which improves surgical efficiency and repair effect.
Patent Information
- Application Number
- CN202422088041.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-27
AI Technical Summary
In the prior art, sutures are easy to rotate during the repair of the lumbar annular fibril repair process, which is not conducive to wrapping and fixing the vertebrae and affecting the surgical efficiency.
A lumbar annular repair system is designed, including a first anchor, a second anchor, a suture and an inserter. By providing a radial through hole and a fixing shaft on the first anchor, the suture is flat, combined with the handle of the inserter and a longitudinal through groove to prevent the suture from rotating, and a split second anchor is used to prevent the suture from rotating during the insertion process.
Ensure that the suture does not rotate and is fixed on the bone structure, making it stronger and more firm, improving surgical efficiency and repair effect.
Smart Images
Figure CN223111745U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical devices, and particularly relates to a lumbar annulus fibrosus repair system. Background Technique
[0002] In recent years, the UBE two-channel minimally invasive spinal endoscopic technique has become a popular technique for lumbar discectomy and decompression in China. Its characteristics such as small minimally invasive wounds, small tissue trauma, fast recovery, low cost, short learning curve, and low tool requirements have been widely accepted and promoted by spinal clinicians. In the simple discectomy for nucleus pulposus removal, a tear in the annulus fibrosus can often be seen during the operation. Although the symptoms of patients are relieved after the operation, the patients need to lie in bed for rest for more than 1 month in the early stage after the operation, and the natural healing ability of the annulus fibrosus tear is poor, and the probability of re-protrusion and prolapse of the nucleus pulposus and endplate of the intervertebral disc in the long term is high.
[0003] At present, the existing endoscopic annulus fibrosus suture can suture the tear in the annulus fibrosus of young patients with good toughness and quality of the annulus fibrosus. However, in a large part of elderly patients, the annulus fibrosus is severely degenerated, with a large tear and poor quality of the annulus fibrosus. The existing annulus fibrosus suture cannot be directly sutured, or the quality of the annulus fibrosus after suture is poor and cannot bear the toughness to prevent re-protrusion.
[0004] The anchor suture is a material combining a nail and a suture. The nail can be anchored in the vertebral body, and the suture can suture the remaining annulus fibrosus and pull it to the edge of the vertebral body to repair the annulus fibrosus that cannot be directly sutured. For large tears or annulus fibrosus defects, the upper and lower vertebral bodies can be anchored with suture-loaded anchors to form an annulus fibrosus repair mesh, that is, an artificial annulus fibrosus, to block and prevent the degenerated nucleus pulposus and endplate from re-protruding and prolapsing. However, the suture is not easy to sort out during use, which affects the surgical efficiency. Content of the Utility Model
[0005] Aiming at the deficiencies of the prior art, the utility model provides a lumbar annulus fibrosus repair system, which mainly solves the problem that the suture is easy to rotate and is not conducive to winding and fixing the vertebral body.
[0006] To achieve the above object, the utility model is realized through the following technical solutions:
[0007] A lumbar annulus fibrosus repair system, comprising a first anchor, a second anchor, a suture and an inserter; the first anchor is provided with a radially penetrating hole, in which a fixing shaft is arranged, the fixing shaft is arranged in a cross shape with the radially penetrating hole, and there is a gap for the suture to pass through smoothly between the outer peripheral surface of the fixing shaft and the hole wall of the radially penetrating hole; the suture is flat; the outer surface of the first anchor is provided with self-tapping threads, one end of the first anchor is a tip, and there is an axial groove on each side of the outer surface of the first anchor, and the two axial grooves penetrate through the other end of the first anchor far from the tip and communicate with both ends of the radially penetrating hole respectively; the inserter includes a handle and an insertion rod, and there are two longitudinally penetrating grooves on both sides of the handle to respectively correspond to the two axial grooves on the first anchor, and a slit is provided on the groove wall of each longitudinally penetrating groove for the suture to enter the longitudinally penetrating groove from the slit; the second anchor includes a first nail body and a second nail body that are coaxially rotatably connected, the outer surface of the second nail body is provided with arc threads, the outer side surface of the first nail body is a smooth surface, and a long strip hole for the suture to pass through is provided on the part of the first nail body exposed outside the second nail body.
[0008] As a preference, a narrow section is formed by locally narrowing the suture, and the width of the narrow section is smaller than the diameter of the radially penetrating hole on the first anchor.
[0009] As a preference, the radially penetrating hole is a circular hole.
[0010] Furthermore, the first anchor includes a nail head, a first rod section and a second rod section, the outer diameter of the second rod section is larger than that of the first rod section, both ends of the second rod section are respectively connected to the first rod section and the nail head, and one end of the first rod section far from the second rod section is a tip; the self-tapping threads on the surface of the first anchor are divided into a first thread section, a second thread section and a third thread section, the first thread section extends from one end of the tip close to the second rod section to the second rod section, the second thread section is located on the second rod section and intersects with the first thread section, the third thread section is located between the second thread section and the nail head, and the pitch of the first thread section and the pitch of the second thread section are both larger than the pitch of the third thread section.
[0011] Furthermore, the radially penetrating hole is located at the position of the second thread section, and the second thread section and the third thread section are partially disconnected to form two axial grooves for the suture to pass through.
[0012] Furthermore, the first anchor is axially provided with an internal hexagonal hole, and the end of the insertion rod of the inserter far from the handle is hexagonal to match the internal hexagonal hole on the first anchor.
[0013] Furthermore, there are a plurality of holes on the side surface of the second nail body that communicate with the long strip hole.
[0014] The utility model has the following beneficial effects:
[0015] The suture is a flat wire. A fixed shaft is arranged in the radially penetrating hole of the first anchor. The suture passes through the fixed shaft and is flattened. Two axial grooves arranged on the outer surface of the first anchor and two longitudinally penetrating grooves arranged on the inserter handle cooperate to straighten the suture and prevent it from winding. The second anchor is of a split type to prevent the suture from rotating when the second anchor is inserted into the vertebral body. The lumbar annulus fibrosus repair system provided by the present utility model can ensure that the suture does not rotate. The flat wire covers and is fixed to the bone structure, which is stronger and more secure, protecting the nucleus pulposus. Description of the Drawings
[0016] Figure 1 is a schematic structural diagram of the first anchor in an embodiment of the present utility model;
[0017] Figure 2 is Figure 1 a cross-sectional view of the first anchor of
[0018] Figure 3 is a side view of the suture;
[0019] Figure 4 is Figure 3 a top view of the suture of
[0020] Figure 5 is an assembly diagram of the suture, the first anchor and the inserter;
[0021] Figure 6 is Figure 5 a partially enlarged view of
[0022] Figure 7 is Figure 5 another view from an angle of
[0023] Figure 8 is along Figure 7 the A-A line in
[0024] Figure 9 is Figure 8 a partially enlarged view of
[0025] Figure 10 is an assembly diagram of the suture and the second anchor;
[0026] Figure 11 is Figure 10 a top view of Detailed Embodiment
[0027] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0029] As Figures 1 to 11 shown, this embodiment discloses a lumbar annulus fibrosus repair system, including a first anchor 1, a second anchor 2, a suture 3, and an inserter 4.
[0030] As Figure 1 and Figure 2 , a radially penetrating hole 11 is provided on the first anchor 1, and a fixing shaft 12 is provided in the radially penetrating hole 11. The fixing shaft 12 and the radially penetrating hole 11 are arranged in a cross shape. The diameter of the fixing shaft 12 is smaller than the diameter of the radially penetrating hole 11 so that there is a gap for the suture 3 to pass through between the outer peripheral surface of the fixing shaft 12 and the hole wall of the radially penetrating hole 11.
[0031] Both axial ends of the fixing shaft 12 are connected to the hole wall of the radially penetrating hole 11. Preferably, the fixing shaft 12 and the first anchor 1 are integrally formed to avoid a gap between the fixing shaft 12 and the first anchor 1 that may catch the suture 3. The suture 3 is flat. Preferably, a narrow section 31 is formed by locally narrowing the suture 3. The width of the narrow section 31 is smaller than the diameter of the radially penetrating hole 11 on the first anchor 1, and the narrow section 31 can smoothly pass through the gap between the outer peripheral surface of the fixing shaft 12 and the hole wall of the radially penetrating hole 11. Reducing the diameter of the first anchor 1 causes less damage to the vertebral body, so the suture 3 is locally narrowed (as Figure 4 ).
[0032] Preferably, the radially penetrating hole 11 is a circular hole. If the radially penetrating hole 11 has a shape other than a circular hole, for example, a polygonal hole, when locking the suture 3, the position of the suture 3 will be restricted due to the straight design, resulting in the winding of the suture 3, and only the circular design can pass through the wider part of the suture 3 (the part other than the narrow section 31). The suture 3 can be folded and bent to pass through, reducing the diameter of the first anchor 1.
[0033] The first anchor 1 includes a nail head 13, a first rod section 14, and a second rod section 15. The outer diameter of the second rod section 15 is greater than the outer diameter of the first rod section 14. Both ends of the second rod section 15 are respectively connected to the first rod section 14 and the nail head 13. One end of the first rod section 14 away from the second rod section 15 is provided as a tip 16.
[0034] The surface of the first anchor screw 1 is provided with a first thread section 17, a second thread section 18, and a third thread section 19. The first thread section 17 extends from one end of the tip 16 close to the second rod section 15 to the second rod section 15. The second thread section 18 is located on the second rod section 15 and intersects with the first thread section 17. The third thread section 19 is located between the second thread section 18 and the nail head 13. The pitch of the first thread section 17 and the pitch of the second thread section 18 are both greater than the pitch of the third thread section 19. The first thread section 17 is mainly located on the first rod section 14, with a small stress area and high pressure, which is convenient for screwing in. The second thread section 18 is located in the cancellous bone, where the bone quality is loose. If the pitch is too small, it will cause bone relaxation and reduce the anti-pull-out performance. A larger pitch can speed up the nail insertion speed. The third thread section 19 is located in the cortical bone, and its pitch is smaller. The first thread section 17, the second thread section 18, and the third thread section 19 are all self-tapping threads.
[0035] On both sides of the outer surface of the first anchor screw 1, there is an axial groove 110 respectively. The two axial grooves 110 penetrate through the nail head 13 and communicate with both ends of the radial through hole 11 respectively. Specifically, the radial through hole 11 is located at the position of the second thread section 18. The second thread section 18 and the third thread section 19 are partially disconnected to form two axial grooves 110 for the suture 3 to pass through, preventing the thread from cutting the suture 3.
[0036] The inserter 4 includes a handle 41 and an insertion rod 42. The first anchor screw 1 is provided with an axial positioning hole. One end of the insertion rod 42 away from the handle 41 is matched with the axial positioning hole of the first anchor screw 1 to drive the first anchor screw 1 to be inserted into the vertebral body. In a specific structure, the axial positioning hole is a polygonal hole. Correspondingly, one end of the insertion rod 42 away from the handle 41 is set as a polygon. For example, the axial positioning hole is an internal hexagonal hole 111, and one end of the insertion rod 42 away from the handle 41 is hexagonal.
[0037] On both sides of the handle 41, there are two longitudinal through grooves 43 (as Figure 7 ) to respectively correspond to the two axial grooves 110 on the first anchor screw 1. The groove walls of the two longitudinal through grooves 43 are provided with gaps to communicate with the outside of the handle 41. The gaps are used for the suture 3 to be inserted into the longitudinal through grooves 43 from the gaps to straighten the suture 3 and avoid entanglement. When in use, the insertion rod 42 of the inserter 4 is inserted into the axial positioning hole of the first anchor screw 1, and the two longitudinal through grooves 43 are aligned with the two axial grooves 110. The narrow section 31 of the suture 3 bypasses the fixed shaft 12 on the first anchor screw 1. The remaining parts of the suture 3 at both ends of the narrow section 31 pass through the axial groove 110 and the longitudinal through groove 43 on the handle 41 of the inserter 4 in sequence. The fixed shaft 12, the axial groove 110, and the longitudinal through groove 43 cooperate to straighten the suture 3. The suture 3 is flat. Preferably, the longitudinal through groove 43 is also set as flat.
[0038] As Figure 10, the second anchor 2 includes a first nail body 21 and a second nail body 22 that are coaxially and rotatably connected. An axial positioning hole is provided inside the second nail body 22. One end of the first nail body 21 is inserted into the axial positioning hole of the second nail body 22. The first nail body 21 can rotate relative to the second nail body 22. An arc-shaped thread is provided on the outer surface of the second nail body 22, and the arc-shaped thread does not cut the suture 3. The axial positioning hole of the second nail body 22 is set to an inner hexagon shape that matches the inserter 4, and the inserter 4 can also be used to drive the second anchor 2 into the vertebral body. The second anchor can also be inserted into the vertebral body by other tools.
[0039] The outer side surface of the first nail body 21 is not provided with a thread and is a smooth surface. The part of the first nail body 21 exposed outside the second nail body 22 is in a frustum shape. A long strip hole 23 for the suture 3 to pass through is provided on the part of the first nail body 21 exposed outside the second nail body 22. The long strip hole 23 is a through hole, and its length direction is along the length direction of the first nail body 21. In order to achieve better bone fusion and increase the pull-out resistance, a plurality of small holes 24 are provided on the side surface of the second nail body 22. These small holes communicate with the long strip hole 23, and the bone union is enhanced by increasing the small holes 24.
[0040] For the repair of large holes or defects under the UBE spinal minimally invasive endoscope, two first anchors 1 with sutures 3 are first used to anchor the upper vertebral body. After threading the sutures outside the body and respectively passing them through the two lower second anchors 2, after implanting the front section (the first nail body 21) of the second anchor 2, the rear section (the second nail body 22) of the second anchor 2 is locked into the lower vertebral body, and the excess suture 3 is cut off. The number of the first anchors and the second anchors can be adjusted according to needs.
[0041] As described above, the embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
Claims
1. A lumbar annulus fibrosus repair system, characterized in that, It includes a first anchor, a second anchor, a suture, and an inserter; The first anchor is provided with a radially penetrating hole, in which a fixed shaft is arranged. The fixed shaft and the radially penetrating hole are arranged in a cross shape. There is a gap between the outer peripheral surface of the fixed shaft and the hole wall of the radially penetrating hole for the suture to pass through smoothly; the suture is flat; The outer surface of the first anchor is provided with self-tapping threads. One end of the first anchor is a tip. On both sides of the outer surface of the first anchor, there is an axial groove respectively. The two axial grooves penetrate through the other end of the first anchor away from the tip and communicate with both ends of the radially penetrating hole respectively; The inserter includes a handle and an insertion rod. On both sides of the handle, there are two longitudinally penetrating grooves respectively corresponding to the two axial grooves on the first anchor. The groove wall of each longitudinally penetrating groove is provided with a slit for the suture to enter the longitudinally penetrating groove from the slit; The second anchor includes a first nail body and a second nail body which are coaxially and rotatably connected. The outer surface of the second nail body is provided with arc threads. The outer side surface of the first nail body is a smooth surface. The part of the first nail body exposed outside the second nail body is provided with a long strip hole for the suture to pass through.
2. The lumbar annulus fibrosus repair system according to claim 1, wherein The suture is locally narrowed to form a narrow section, and the width of the narrow section is smaller than the diameter of the radially penetrating hole on the first anchor.
3. The lumbar annulus fibrosus repair system according to claim 1 or 2, characterized in that, The radially penetrating hole is a round hole.
4. The lumbar annulus fibrosus repair system according to claim 1, characterized in that, The first anchor includes a nail head, a first rod section, and a second rod section. The outer diameter of the second rod section is larger than that of the first rod section. The two ends of the second rod section are respectively connected to the first rod section and the nail head. One end of the first rod section away from the second rod section is a tip; the self-tapping threads on the surface of the first anchor are divided into a first thread section, a second thread section, and a third thread section. The first thread section extends from one end of the tip close to the second rod section to the second rod section. The second thread section is located on the second rod section and intersects with the first thread section. The third thread section is located between the second thread section and the nail head. The pitch of the first thread section and the pitch of the second thread section are both larger than the pitch of the third thread section.
5. The lumbar annulus fibrosus repair system according to claim 4, wherein The radially penetrating hole is located at the position of the second thread section. The second thread section and the third thread section are partially disconnected to form the two axial grooves for the suture to pass through.
6. The lumbar annulus fibrosus repair system according to claim 4, wherein, The first anchor is axially provided with an internal hexagonal hole. The end of the insertion rod of the inserter away from the handle is hexagonal to match the internal hexagonal hole on the first anchor.
7. The lumbar annulus fibrosus repair system according to claim 1, characterized in that, The side surface of the second nail body is provided with a plurality of holes communicating with the long strip hole.