A suture anchor and a matching implantation device thereof

Abstract

The present application relates to the technical field of medical auxiliary apparatus, and especially relates to a wire anchor and a matched implantation device thereof, which technical scheme comprises a spiral positioning part, a main body part and a positioning core, the spiral positioning part comprises a conical head and a connecting shaft fixed with the conical head, the conical head is provided with a first thread, the main body part comprises a sleeve, and the sleeve is provided with a compression cavity and a suture hole. The anchor is arranged in the form that the conical head and the sleeve are matched, when the anchor is implanted, the anchor can be implanted as a whole by rotating the conical head, the suture is arranged in the suture hole on the sleeve, the sleeve can be kept fixed during implantation, the anchor can be implanted without using tools to knock the implantation device, and the problem that the existing screw-in anchor is prone to inaccurate suture angle positioning is avoided.

Description

Technical Field

[0001] This invention relates to the field of medical assistive device technology, specifically to a wire anchor and its matching insertion device. Background Technology

[0002] Arthroscopic procedures typically involve reattaching soft tissue to bone, usually achieved using anchors and matching insertion devices, along with auxiliary instruments and sutures. The attachment process includes:

[0003] An auxiliary instrument is inserted into the surgical site. A hole is made in the soft tissue using the instrument, and a folded suture is inserted into the hole and pulled out. One end of a suture is then inserted through the folded suture and pulled back, allowing the suture to pass through the hole in the soft tissue. The other end of the suture is then pulled out. A hole is made in the bone at the surgical site for inserting an anchor. The pulled-out end of the suture is attached to the hole in the anchor, and the anchor is secured to the insertion device using an auxiliary suture. The anchor is inserted into the hole in the bone. The auxiliary suture used to secure the anchor and insertion device is removed. The end of the suture left outside is pulled, attaching the soft tissue together. The core in the anchor is twisted using the insertion device to tighten the suture. The end of the suture left outside is then cut off.

[0004] In the above process, the anchors commonly used are hammer-in or screw-in anchors, which have holes for threading the stitches.

[0005] The existing technology still has the following drawbacks in its use:

[0006] 1. The existing technology has a complicated operation process with many steps. The process of inserting the anchor requires hammering, which poses surgical risks and may also lead to errors in the insertion angle of the anchor.

[0007] 2. In the prior art, the hammer-in anchor is usually designed in a conical shape to ensure that the anchor remains stable after it is inserted, which makes it difficult to remove when the patient has adverse reactions or other situations that require removal.

[0008] 3. Existing screw-in anchors pose a risk of knotting during the screwing-in process.

[0009] In view of this, we propose a wire anchor and its matching insertion device to solve the existing problems. Summary of the Invention

[0010] The purpose of this invention is to provide a wire anchor and its matching insertion device to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a wire anchor and its matching insertion device, wherein the wire anchor includes a spiral positioning part, a main body part, and a positioning core. The spiral positioning part includes a conical head and a connecting shaft fixed to the conical head. The conical head is provided with a first thread. The main body part includes a sleeve. The sleeve has a pressing cavity and a sewing hole. The inner wall of the sleeve is provided with a second thread, which is an internal thread. The positioning core includes a core body. The outer surface of the core body is provided with a third thread. The core body has a positioning hole. The third thread is an external thread. The core body is disposed in the pressing cavity of the sleeve and is connected by the mating threads of the second thread and the third thread. The connecting shaft is movably installed in the positioning hole.

[0012] Preferably, the first thread is an external thread, and the direction of the thread is opposite to the direction of the second and third threads.

[0013] Preferably, the spiral positioning part further includes a limiting tail end, which is fixed on the connecting shaft at the end away from the conical head. The limiting tail end is provided with a first positioning groove, the sleeve at the end on the same side as the limiting tail end is provided with a second positioning groove, and the core body at the end on the same side as the limiting tail end is provided with a third positioning groove and a bayonet.

[0014] Preferably, a clearance groove is provided at the position corresponding to the suture hole on the connecting shaft, and the straight line where the suture hole is located does not intersect the axis of the connecting shaft.

[0015] One type of anchor bolt insertion device includes a handheld part and an anchor bolt. The handheld part has a handheld tube, and a first connecting rod is fixedly installed in the handheld tube. The end of the first connecting rod away from the handheld tube is provided with a first positioning head that is adapted to a second positioning groove. The first rotating part includes a second connecting rod, which is movably installed in the inner cavity of the first connecting rod. The end of the second connecting rod is provided with a second positioning head that is adapted to the first positioning groove. The second rotating part includes a third connecting rod, which is movably installed between the first connecting rod and the second connecting rod. The end of the third connecting rod is provided with a third positioning head that is adapted to a third positioning groove and a bayonet.

[0016] Preferably, the first rotating part further includes a first knob, which is fixedly installed at the other end of the second connecting rod, and the end of the second connecting rod extends through a through hole to the outside of the handheld tube.

[0017] Preferably, the second rotating part further includes a second knob, and the third connecting rod has a hole at one end near the first knob. The second connecting rod passes through the hole of the third connecting rod. The second knob is located between the handheld tube and the first knob, and a sleeve is fixedly installed on the side away from the first knob. The sleeve has an inner hexagonal groove. The end of the third connecting rod facing the second knob is hexagonal, and the third connecting rod is inserted into the inner hexagonal groove of the sleeve and is elastically connected by a first elastic element.

[0018] Preferably, the handheld part includes a limiting part and an adjusting part. The limiting part includes a trapezoidal block and a second elastic element. The handheld part also includes a movable groove formed on the first positioning head. The trapezoidal blocks are distributed in the movable groove and are elastically connected to each other by the second elastic element. The trapezoidal blocks have an inclined surface facing the first knob. The adjusting part is movably installed in the first connecting rod and drives the trapezoidal blocks to extend and retract.

[0019] Preferably, the adjusting part includes a fourth connecting rod, a transmission part, and a third knob. The third knob is fixedly installed on the transmission part. The transmission part is threadedly sleeved on the end of the fourth connecting rod. A limit block is fixedly installed on the fourth connecting rod. The fourth connecting rod is movably sleeved between the first connecting rod and the third connecting rod. The handheld sleeve has a groove. The third knob is rotatably installed in the groove. The first connecting rod also has a straight groove. The limit block is located in the straight groove. The end of the fourth connecting rod contacts the inclined surface of the trapezoidal locking block.

[0020] Preferably, the length of the straight groove is adapted to the maximum extension length of the trapezoidal block.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention sets the anchor in the form of a conical head and a sleeve. When inserting the anchor, the conical head can be rotated to insert the entire anchor. The thread is passed through the thread hole on the sleeve. The sleeve remains fixed during the insertion process. The anchor can be inserted without using tools to strike the insertion device. At the same time, it avoids the problem of inaccurate thread angle positioning of existing screw-in anchors. It also avoids the thread from twisting together during the screwing process. Therefore, it has the advantages of simple insertion process and reduced possibility of operation error.

[0023] 2. The present invention inserts the anchor into the bone through the insertion device. The operation process is simple. Compared with the prior art, it is not necessary to insert another wire for fixing the anchor and the insertion device into the suture hole. Instead, it is only necessary to turn the third knob to make the trapezoidal block lock in the second positioning groove. When separating the two, the third knob can be turned again, which significantly improves the efficiency of operation.

[0024] 3. By setting the anchor pins to be screwed in through a conical head, the present invention has high tensile strength and can be easily removed after a period of time when it causes discomfort, infection or complications to the patient.

[0025] 4. By setting the first thread and the second thread to opposite directions, the present invention allows the first knob and the second knob to be rotated in opposite directions during operation, which clearly distinguishes the two operation steps and further avoids operator errors.

[0026] 5. The placement device design of this invention has several advantages, significantly simplifying the surgical procedure compared to existing technologies. First, its integrated design allows for the placement of the anchor and the tightening of the suture in a single operation, reducing surgical steps and improving efficiency. Second, the device is easy to operate; the placement of the anchor and the tightening of the suture can be controlled simply by rotating a knob, reducing operational complexity and surgical time. Furthermore, the design reduces the number of auxiliary tools and materials required during surgery, such as eliminating the need for additional sutures to fix the anchor and placement device, further simplifying the procedure. Finally, the structural design of the placement device helps improve surgical precision and safety, reduces surgical risks, and ensures reliable surgical outcomes. These advantages give this invention significant advantages in clinical applications, providing patients with safer and more efficient treatment options. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the wire anchor and insertion device of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the wire anchor of the present invention;

[0029] Figure 3 This is a schematic diagram of the conical head and connecting shaft of the present invention;

[0030] Figure 4 This is a perspective sectional view of the sleeve and the core body of the present invention;

[0031] Figure 5 This is a schematic diagram of the external appearance of the handheld part of the present invention;

[0032] Figure 6 for Figure 5 A schematic diagram of the end structure of the first connecting rod facing the conical head;

[0033] Figure 7 This is a schematic diagram of the structure of the first rotating part of the present invention;

[0034] Figure 8 for Figure 7 A schematic diagram of the structure of the second positioning head at the end of the second connecting rod;

[0035] Figure 9 This is a schematic diagram of the structure of the second rotating part of the present invention;

[0036] Figure 10 for Figure 9 Side view;

[0037] Figure 11 for Figure 9 A schematic diagram of the structure after the third connecting rod and sleeve are disassembled;

[0038] Figure 12 This is a schematic diagram of the structure of the limiting part of the present invention;

[0039] Figure 13 This is a schematic diagram of the structure of the adjustment part of the present invention;

[0040] Figure 14 This is a schematic diagram of the structure of the fourth connecting rod of the present invention;

[0041] Figure 15 This is a schematic diagram of the assembly of the hand-held sleeve and the fourth connecting rod at the straight groove of the present invention.

[0042] Figure 16 This is a schematic diagram showing the positional relationship of the handheld part, the first rotating part, the second rotating part, the limiting part, and the adjusting part of the present invention.

[0043] Figure 17 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0044] In the diagram: 1. Spiral positioning part; 2. Main body; 3. Positioning core; 4. Handheld part; 5. First rotating part; 6. Second rotating part; 7. Limiting part; 8. Adjusting part; 11. Conical head; 13. Connecting shaft; 12. First thread; 13. Connecting shaft; 14. Limiting tail end; 15. First positioning groove; 16. Clearance groove; 21. Sleeve; 22. Pressing cavity; 23. Sewing hole; 24. Second positioning groove; 25. Second thread; 31. Core body; 32. Positioning hole; 33. Third positioning groove; 34. Bayonet; 35. 41. Third thread; 42. Handheld sleeve; 43. First connecting rod; 44. Through hole; 45. Groove; 46. First positioning head; 47. Movable groove; 58. Straight groove; 59. Second connecting rod; 50. First knob; 51. Second positioning head; 62. Third connecting rod; 63. Second knob; 64. Sleeve rod; 65. First elastic element; 71. Trapezoidal block; 72. Second elastic element; 73. Inclined surface; 84. Fourth connecting rod; 85. Transmission part; 86. Third knob; 87. Limiting block. Detailed Implementation

[0045] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] Example 1:

[0047] Please see Figures 1-16 A type of anchor with a thread includes a spiral positioning part 1, a main body part 2, and a positioning core 3. The spiral positioning part 1 includes a conical head 11 and a connecting shaft 13 fixed to the conical head 11. The conical head 11 is provided with a first thread 12. The main body part 2 includes a sleeve 21, which has a pressing cavity 22 and a sewing hole 23. The inner wall of the sleeve 21 is provided with a second thread 25, which is an internal thread. The positioning core 3 includes a core body 31, which has a third thread 35 on its outer surface. The core body 31 has a positioning hole 32, and the third thread 35 is an external thread. The core body 31 is disposed in the pressing cavity 22 of the sleeve 21 and is connected by the mating thread of the second thread 25 and the third thread 35. The connecting shaft 13 is movably installed in the positioning hole 32.

[0048] When using the above technical solution, the suture is threaded into the suture hole 23. The conical head 11 is screwed into the hole that has been drilled on the patient's bone. After reaching the position, the core body 31 is screwed to press the suture between the inner end face of the sleeve 21 and the outer end face of the core body 31, and then the subsequent operations are continued.

[0049] The above technical solution achieves the following effects: the anchor is screwed into the bone as a whole by the conical head 11, which improves its pull-out strength and stability compared to the hammer-in method, and eliminates the step of hammering the anchor in; in case of special circumstances such as patient discomfort, infection or other complications after placement, the anchor can be unscrewed out, which is also easier than the hammer-in method in the prior art; during the placement process, since the sleeve 21 and the conical head 11 can rotate relative to each other, the angle of the sleeve 21 remains unchanged during the overall placement, so the angle of the suture passing through the suture hole 23 will not change, maintaining the stability of the suture during the placement process, which is convenient for subsequent operations.

[0050] The first thread 12 is an external thread, and the direction of the thread is opposite to that of the second thread 25 and the third thread 35. This makes a clear distinction between the two processes of inserting the anchor and pressing the core body 31. That is, the insertion process and the pressing process of the core body 31 are turned in opposite directions to avoid interfering with the insertion process.

[0051] The spiral positioning part 1 also includes a limiting tail end 14, which is fixed on the connecting shaft 13 at one end away from the conical head 11. The limiting tail end 14 is provided with a first positioning groove 15. The sleeve 21 and the end of the limiting tail end 14 on the same side are provided with a second positioning groove 24. The core body 31 and the end of the limiting tail end 14 on the same side are provided with a third positioning groove 33 and a bayonet 34.

[0052] In the above technical solution, the first positioning groove 15 and the second positioning groove 24 are hexagonal grooves, the third positioning groove 33 is an annular structure, and the area of ​​the second positioning groove 24 is larger than the cross-sectional area of ​​the core body 31. The area of ​​the cross-section of the second positioning groove 24 increases from the end face toward the conical head 11.

[0053] By adopting the above technical solution, the conical head 11, sleeve 21 and core body 31 are clearly distinguished, and the conical head 11 and core body 31 can be made to perform corresponding actions by using corresponding tools, thereby completing the two processes of inserting and pressing the sewing thread.

[0054] A matching insertion device for a wire anchor, applied to a wire anchor, includes: a handheld part 4, including a handheld tube 41, on which a first connecting rod 42 is fixedly installed, and the end of the first connecting rod 42 away from the handheld tube 41 is provided with a first positioning head 45 adapted to a second positioning groove 24; a first rotating part 5, including a second connecting rod 51, movably installed in the inner cavity of the first connecting rod 42, and the end is provided with a second positioning head 53 adapted to the first positioning groove 15; a second rotating part 6, including a third connecting rod 61, movably installed between the first connecting rod 42 and the second connecting rod 51, and the end is provided with a third positioning head 63 adapted to the third positioning groove 33 and the bayonet 34.

[0055] By adopting the above technical solution, the device can be applied to the anchor. When in use, the first positioning head 45 is inserted into the second positioning groove 24, the second positioning head 53 is inserted into the first positioning groove 15, and the end of the third connecting rod 61 and the third positioning head 63 are inserted into the third positioning groove 33 and the bayonet 34. By controlling the rotation of the third connecting rod 61 and the second connecting rod 51 at the other end, the rotation of the conical head 11 and the core body 31 can be controlled independently, thereby controlling the insertion process of the anchor and the process of the core body 31 pressing the seam.

[0056] The first rotating part 5 also includes a first knob 52, which is fixedly installed at the other end of the second connecting rod 51. The handheld tube 41 has a through hole 43, through which the end of the second connecting rod 51 passes to the outside of the handheld tube 41.

[0057] By adopting the above technical solution, controlling the rotation of the first knob 52 can drive the rotation of the second connecting rod 51. In use, the operator holds the handheld tube 41 and operates the first knob 52.

[0058] The second rotating part 6 also includes a second knob 62. The third connecting rod 61 has a hole at one end near the first knob 52. The second connecting rod 51 passes through the hole of the third connecting rod 61. The second knob 62 is located between the handheld tube 41 and the first knob 52. A sleeve rod 64 is fixedly installed on the side away from the first knob 52. The sleeve rod 64 has an inner hexagonal groove. The end of the third connecting rod 61 facing the second knob 62 is hexagonal and is inserted into the inner hexagonal groove of the sleeve rod 64, and is elastically connected by the first elastic member 65.

[0059] The first elastic element 65 is a spring. In the initial state, under the action of the first elastic element 65, the end of the third connecting rod 61 away from the second knob 62 extends to the outside of the first connecting rod 42. After docking, this end of the third connecting rod 61 is fully pressed into the first connecting rod 42. Before the stitching is tightened after the anchor is inserted, the second knob 62 is turned, and the core body 31 rotates and moves linearly towards the conical head 11. The first elastic element 65 gradually returns to its original position. Under the action of the first elastic element 65, the end of the third connecting rod 61 facing the conical head 11 gradually extends to the outside of the first connecting rod 42 and always maintains contact with the core body 31. This process can ensure that the third connecting rod 61 does not detach from the core body 31, so as to continuously and stably screw the core body 31 in.

[0060] The above-mentioned twisting process includes two operations: one is to control the rotation of the conical head 11, which is achieved by the first knob 52; the other is to control the movement of the core body 31, which is achieved by the second knob 62. The two steps require the first knob 52 and the second knob 62 to be rotated in opposite directions.

[0061] The device also includes a limiting part 7, which includes a trapezoidal locking block 71 and a second elastic member 72; the handheld part 4 also includes a movable groove 46 formed on the first positioning head 45; the trapezoidal locking blocks 71 are distributed in the movable groove 46, and the trapezoidal locking blocks 71 are elastically connected to each other by the second elastic member 72; the trapezoidal locking blocks 71 have an inclined surface 73 facing the first knob 52, and the device also includes an adjusting part 8, which includes a fourth connecting rod 81, a transmission part 82, and a third knob 83; the third knob 83 is fixedly installed on the transmission part 82; the transmission part 83 is fixedly installed on the transmission part 82. Part 82 is threaded onto the end of the fourth connecting rod 81; the fourth connecting rod 81 is fixedly mounted with a limiting block 84; the fourth connecting rod 81 is movably sleeved between the first connecting rod 42 and the third connecting rod 61; the hand-held sleeve 41 has a groove 44, and the third knob 83 is rotatably mounted in the groove 44; the first connecting rod 42 also has a straight groove 47, and the limiting block 84 is located in the straight groove 47; the end of the fourth connecting rod 81 contacts the inclined surface of the trapezoidal locking block 71, and the length of the straight groove 47 is adapted to the maximum extension length of the trapezoidal locking block 71.

[0062] By adopting the above technical solution, during use, turning the third knob 83 will cause the transmission part 82 to rotate, thereby driving the fourth connecting rod 81 to move linearly and contact the inclined surface 73 of the trapezoidal block 71 until the trapezoidal block 71 is pressed out into the second positioning groove 24. After being pressed out, the outer arc surface of the fourth connecting rod 81 contacts the inner end face of the trapezoidal block 71, which can prevent the trapezoidal block 71 from retracting. The trapezoidal block 71 is locked in the second positioning groove 24, so that the device and the anchor can be installed together. Compared with the prior art, this can save the wire used to fix the insertion device and the anchor, and there is no need to run an extra wire during installation. After the anchor is screwed in, there is no need to remove the wire that fixes the insertion device and the anchor, thereby reducing the operation steps. Moreover, the operation only requires turning the third knob 83, which improves the convenience of operation.

[0063] Example 2:

[0064] The difference from Embodiment 1 is that a clearance groove 16 is provided at the position corresponding to the stitch hole 23 on the connecting shaft 13; the straight line where the stitch hole 23 is located does not intersect the axis of the connecting shaft 13.

[0065] By setting the suture hole 23 in an eccentric form, after the suture is inserted, the suture is located in the relief groove 16 therein, so that the suture does not have to contact the connecting shaft 13. Furthermore, since there is no obstruction from the connecting shaft 13, the process of inserting the suture is also easier.

[0066] Example 3:

[0067] The difference from Example 2 is that, as Figure 17 As shown, and in combination Figure 3 In comparison, the recessed groove 16 provides a smooth transition of the connecting shaft 13 toward the end of the tapered head 11, preventing the thread from getting stuck in the recessed groove 16, thus allowing the thread to be tightened smoothly.

[0068] The above specific embodiments are merely several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A wire anchor, comprising a spiral positioning part, a main body part, and a positioning core, characterized in that: The spiral positioning part includes a conical head and a connecting shaft fixed to the conical head. The conical head is provided with a first thread. The main body includes a sleeve. The sleeve has a pressing cavity and a sewing hole. The inner wall of the sleeve is provided with a second thread, which is an internal thread. The positioning core includes a core body. The outer surface of the core body is provided with a third thread. The core body has a positioning hole. The third thread is an external thread. The core body is disposed in the pressing cavity of the sleeve and is connected by the mating threads of the second and third threads. The connecting shaft is movably installed in the positioning hole. The spiral positioning part also includes a limiting tail end. The limiting tail end is fixed on the connecting shaft at the end away from the conical head. The limiting tail end has a first positioning groove. The sleeve and the end on the same side of the limiting tail end have a second positioning groove. The core body and the end on the same side of the limiting tail end have a third positioning groove and a bayonet.

2. The anchor bolt with wire according to claim 1, characterized in that: The first thread is an external thread, and the direction of the external thread of the first thread is opposite to the direction of the second and third threads.

3. The anchor bolt with wire according to claim 1, characterized in that: A clearance groove is provided at the position corresponding to the suture hole on the connecting shaft, and the straight line where the suture hole is located does not intersect the axis of the connecting shaft.

4. A device for inserting a wire anchor, comprising a handheld part and a wire anchor as described in any one of claims 1-2, characterized in that: It also includes a first rotating part and a second rotating part. The handheld part is provided with a handheld tube. The handheld tube is fixedly installed with a first connecting rod. The end of the first connecting rod away from the handheld tube is provided with a first positioning head that is adapted to the second positioning groove. The first rotating part includes a second connecting rod, which is movably installed in the inner cavity of the first connecting rod. The end of the second connecting rod is provided with a second positioning head that is adapted to the first positioning groove. The second rotating part includes a third connecting rod, which is movably installed between the first connecting rod and the second connecting rod. The end of the third connecting rod is provided with a third positioning head that is adapted to the third positioning groove and the bayonet.

5. The anchor bolt insertion device according to claim 4, characterized in that: The first rotating part also includes a first knob, which is fixedly installed at the other end of the second connecting rod, and the end of the second connecting rod extends through a through hole to the outside of the handheld tube.

6. The anchor bolt insertion device according to claim 5, characterized in that: The second rotating part also includes a second knob. The third connecting rod has a hole at one end near the first knob. The second connecting rod passes through the hole of the third connecting rod. The second knob is located between the handheld tube and the first knob. A sleeve is fixedly installed on the side away from the first knob. The sleeve has an inner hexagonal groove. The end of the third connecting rod facing the second knob is hexagonal. The third connecting rod is inserted into the inner hexagonal groove of the sleeve and is elastically connected by a first elastic element.

7. The anchor bolt insertion device according to claim 6, characterized in that: The handheld part includes a limiting part and an adjusting part. The limiting part includes a trapezoidal block and a second elastic element. The handheld part also includes a movable groove formed on the first positioning head. The trapezoidal blocks are distributed in the movable groove and are elastically connected to each other by the second elastic element. The trapezoidal blocks have an inclined surface facing the first knob. The adjusting part is movably installed in the first connecting rod and drives the trapezoidal blocks to extend and retract.

8. The anchor bolt insertion device according to claim 7, characterized in that: The adjustment unit includes a fourth connecting rod, a transmission unit, and a third knob. The third knob is fixedly installed on the transmission unit. The transmission unit is threaded onto the end of the fourth connecting rod. A limit block is fixedly installed on the fourth connecting rod. The fourth connecting rod is movably sleeved between the first connecting rod and the third connecting rod. The handheld sleeve has a groove. The third knob is rotatably installed in the groove. The first connecting rod also has a straight groove. The limit block is located in the straight groove. The end of the fourth connecting rod contacts the inclined surface of the trapezoidal locking block.

9. The anchor bolt insertion device according to claim 8, characterized in that: The length of the straight groove is adapted to the maximum extension length of the trapezoidal block.

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