Tendon anchor implantation system

Abstract

The present invention relates to the field of medical device technology, and discloses a tendon anchor implantation system. The tendon anchor implantation system includes a drill rod, an inner core rod, and an implantation rod, wherein the implantation rod is provided with a first guide hole; the tendon anchor is provided with a penetrating second guide hole, the first end of the inner core rod is passed through the first guide hole and the second guide hole, one end of the drill rod is connected to the first end of the inner core rod, and the other end is conical and extends out of the second guide hole; the tendon anchor includes a fixing seat and a nail body that are connected to each other, the implantation rod abuts against the fixing seat, the fixing seat is used to fix the patch, and the side wall of the nail body is provided with a barbed protrusion. Compared with the prior art, the present invention does not need to set a pre-piercing point on the rotator cuff, does not need to pull the lead wire, reduces damage to the rotator cuff, and realizes the fixation of the patch. The tendon anchor can quickly and conveniently complete the implantation process in conjunction with the implanter, thereby improving the efficiency of the operation and shortening the operation time.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a tendon anchor implantation system. Background Art

[0002] Rotator cuff repair typically involves suturing a patch between the greater tuberosity and the glenoid fossa to connect the two, thereby restoring the superior joint capsule and compressing the humeral head downward. During surgery, the surgeon first sews sutures onto the patch, connecting it to the humeral head. The surgeon then passes one end of the suture through an anchor and a pre-threaded hole in the greater tuberosity, securing the anchor to the greater tuberosity. The other end of the suture engages the tendon, allowing the patch to stretch between the greater tuberosity and the glenoid fossa, repairing the rotator cuff.

[0003] Existing rotator cuff repair surgery has the following technical problems:

[0004] Rotator cuff repair surgery is performed arthroscopically. After the rotator cuff tear is sutured, the distance between the pre-implanted sutures on both sides can only be determined based on the physician's experience. Without measuring instruments or reference objects within the joint cavity, the location of the pre-insertion points is difficult to control. If the pre-inserted suture points are too large, the sutures will tighten during knotting, further damaging the rotator cuff assembly. If the points are too small, the fixed patch will not be able to provide auxiliary fixation due to the lack of tension.

[0005] Second, the sutures used to sew the rotator cuff and the patch need to be tied and secured. When tying the knot, due to the difference between the threading point on the rotator cuff soft tissue and the threading point on the patch, the sutures need to be pulled to make the patch reach the suture site before the knot is tied. This pulling of the sutures can cause a risk of cutting the rotator cuff soft tissue. Furthermore, a suture knotter is required to tie the knot, and the sutures need to be tightened to resist the knotter, which can further damage the damaged rotator cuff.

[0006] 3. After fixing the four corner points of the patch, the side edges need to be sutured and fixed, and a thread guide is used to horizontally pass through the two entry and exit points of the rotator cuff tissue, which increases the damage to the rotator cuff.

[0007] Based on this, there is an urgent need for a tendon anchor implantation system to solve the above-mentioned problems. Summary of the Invention

[0008] Based on the above, the purpose of the present invention is to provide a tendon anchor implantation system, which reduces damage to the rotator cuff and realizes the fixation of the patch. The tendon anchor combined with the implanter can quickly and conveniently complete the implantation process, improve surgical efficiency, and shorten the operation time.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] A tendon anchor implantation system, comprising:

[0011] The implanter comprises an inner core rod, an implant rod and a drill rod, wherein the implant rod is provided with a first guide hole;

[0012] A tendon anchor, wherein the tendon anchor is provided with a second guide hole extending therethrough, the first end of the inner core rod is passed through the first guide hole and the second guide hole, one end of the drill rod is connected to the first end of the inner core rod, and the other end is conical and extends out of the second guide hole;

[0013] The tendon anchor comprises a fixing seat and a nail body that are connected to each other. The implant rod abuts against the fixing seat. The fixing seat is used to fix the patch. The side wall of the nail body is provided with a barb protrusion.

[0014] As a preferred technical solution of a tendon anchor implantation system, the implanter further comprises an inner rod handle and an outer rod handle, wherein the inner rod handle is provided with a slide groove, and the outer rod handle is slidably connected to the slide groove;

[0015] A first connecting hole is provided at the bottom of the chute, and one end of the inner core rod away from the tendon anchor is passed through the chute and connected to the first connecting hole;

[0016] The outer rod handle is provided with a second connecting hole, and one end of the implant rod away from the tendon anchor is connected to the second connecting hole.

[0017] As an optimal technical solution for a tendon anchor implantation system, the inner wall of the slide groove is provided with a first limiting protrusion, and the outer wall of the outer rod handle is provided with a second limiting protrusion. The second limiting protrusion is located between the first limiting protrusion and the bottom of the slide groove. When the inner core rod is disengaged from the second guide hole, the first limiting protrusion is used to stop the second limiting protrusion.

[0018] As an optimal technical solution for a tendon anchor implantation system, the outer rod handle is provided with a disc portion, and when the implantation rod abuts against the fixing seat, the disc portion stops the notch end surface of the slide groove.

[0019] As a preferred technical solution of a tendon anchor implantation system, the drill rod and the inner core rod are integrally formed; or

[0020] The first end of the inner core rod is provided with a third connecting hole, and the drill rod is connected to the third connecting hole.

[0021] As a preferred technical solution for a tendon anchor implantation system, the outer wall of the inner rod handle is provided with an anti-slip structure.

[0022] As a preferred technical solution for a tendon anchor implantation system, the barbed protrusion is in the shape of a fish fin.

[0023] As a preferred technical solution for a tendon anchor implantation system, the width of the barbed protrusion along the radial cross section of the nail body gradually decreases from the root to the top.

[0024] As a preferred technical solution for a tendon anchor implantation system, the fixing seat is provided with a plurality of claws extending toward one side of the nail body.

[0025] As a preferred technical solution for a tendon anchor implantation system, the end of the nail body away from the fixing seat is in a truncated cone shape.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a tendon anchor implantation system. Before surgery, the first end of an inner core rod is inserted into a first guide hole of an implant rod and a second guide hole of a tendon anchor. One end of a drill rod is connected to the first end of the inner core rod, and the other end is conical and extends out of the second guide hole. The implant rod abuts against a fixing seat, thereby realizing the connection between the tendon anchor and the implanter.

[0028] When it is necessary to implant the tendon anchor into the rotator cuff, the conical end of the drill rod is used to pierce the tendon tissue first, thereby pre-opening an implantation path for the implantation of the tendon anchor; the implantation rod abuts against the fixing seat of the tendon anchor, and an axial force is applied to the implantation rod, and its axial force is transmitted to the head end of the implantation rod, indirectly acting on the fixing seat of the tendon anchor, so that the tendon anchor is implanted into the tendon; after the tendon anchor is completely implanted into the tendon, the inner core rod is pulled back axially, and at the same time, the implantation rod remains fixed, and the implantation rod provides an inward resistance force for the tendon anchor, preventing the tendon anchor from being pulled out, and facilitating the pulling out of the inner core rod; moreover, since the side wall of the nail body is provided with a barb protrusion, the barb protrusion increases the friction between the tendon anchor and the implantation path of the tendon, and the tendon anchor will not be pulled out, further improving the stability of the tendon anchor in the tendon, and the fixing seat fixes the patch to the surface of the tendon, realizing the implantation and fixation of the patch. Compared with the prior art, the present invention does not require setting a pre-puncture point on the rotator cuff, does not require pulling the lead, reduces damage to the rotator cuff, and achieves fixation of the patch. The tendon anchor combined with the implanter can quickly and conveniently complete the implantation process, improves surgical efficiency, and shortens operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0030] Figure 1 1 is a schematic structural diagram of a tendon anchor implantation system provided in a specific embodiment of the present invention;

[0031] Figure 2 is a structural exploded diagram of a tendon anchor implantation system provided in a specific embodiment of the present invention;

[0032] Figure 3 is a cross-sectional view of a tendon anchor implantation system provided by a specific embodiment of the present invention;

[0033] Figure 4 yes Figure 3 Enlarged view at point A;

[0034] Figure 5 It is a schematic structural diagram of a tendon anchor provided in a specific embodiment of the present invention.

[0035] The following are marked in the figure:

[0036] 1. Implanter; 11. Drill rod; 12. Inner core rod; 121. Third connecting hole; 13. Implant rod; 131. First guide hole; 14. Inner rod handle; 141. Slide groove; 142. First connecting hole; 143. First stop protrusion; 144. Anti-slip structure; 15. Outer rod handle; 151. Second connecting hole; 152. Second stop protrusion; 153. Disc portion;

[0037] 2. Tendon anchor; 21. Second guide hole; 22. Fixing seat; 221. Clamping claw; 23. Nail body; 231. Barbed protrusion. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0039] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0042] like Figure 1-Figure 5 As shown, this embodiment provides a tendon anchor implantation system, which includes an implanter 1 and a tendon anchor 2. Specifically, the implanter 1 includes a drill rod 11, an inner core rod 12, and an implant rod 13. The implant rod 13 is provided with a first guide hole 131. The tendon anchor 2 is provided with a second guide hole 21 extending therethrough. The first end of the inner core rod 12 is passed through the first guide hole 131 and the second guide hole 21. One end of the drill rod 11 is connected to the first end of the inner core rod 12, and the other end is conical and extends out of the second guide hole 21. The tendon anchor 2 includes a fixed seat 22 and a nail body 23 that are connected to each other. The implant rod 13 abuts the fixed seat 22, which is used to fix the patch. The side wall of the nail body 23 is provided with a barbed protrusion 231. In this embodiment, the inner diameter of the first guide hole 131 matches the diameter of the inner core rod 12.

[0043] Before the operation, the first end of the inner core rod 12 is passed through the first guide hole 131 of the implant rod 13 and the second guide hole 21 of the tendon anchor 2. One end of the drill rod 11 is connected to the first end of the inner core rod 12, and the other end is conical and extends out of the second guide hole 21; the implant rod 13 abuts against the fixing seat 22, thereby realizing the connection between the tendon anchor 2 and the implanter 1. When the tendon anchor 2 needs to be implanted into the rotator cuff, the conical end of the drill rod 11 is used to pierce the tendon tissue first, thereby pre-opening an implantation path for the implantation of the tendon anchor 2; the implant rod 13 abuts against the fixing seat 22 of the tendon anchor 2, and applies an axial force to the implant rod 13. The axial force is transmitted to the head end of the implant rod 13, indirectly acting on the fixing seat 22 of the tendon anchor 2, so that the tendon anchor 2 is implanted into the tendon; after the tendon anchor 2 is completely implanted into the tendon, the inner core rod 12 is pulled back axially, and at the same time, the implant The rod 13 remains stationary, and the implant rod 13 provides an inward antagonistic force for the tendon anchor 2, preventing the tendon anchor 2 from being pulled out and facilitating the extraction of the inner core rod 12. Moreover, since the side wall of the nail body 23 is provided with a barbed protrusion 231, the barbed protrusion 231 increases the friction between the tendon anchor 2 and the implantation tract of the tendon, and the tendon anchor 2 will not be pulled out, further improving the stability of the tendon anchor 2 in the tendon. The fixing seat 22 fixes the patch to the surface of the tendon, achieving the implantation and fixation of the patch. Compared with the prior art, this embodiment does not require the provision of a pre-piercing point on the rotator cuff, does not require the pulling of a lead wire, reduces damage to the rotator cuff, and achieves the fixation of the patch. The tendon anchor 2 can be quickly and conveniently implanted in conjunction with the implantation device 1, thereby improving the efficiency of the operation and shortening the operation time.

[0044] Preferably, if Figure 1-Figure 3 As shown, the implanter 1 further includes an inner rod handle 14 and an outer rod handle 15. The inner rod handle 14 is provided with a slide groove 141, and the outer rod handle 15 is slidably connected to the slide groove 141. The bottom of the slide groove 141 is provided with a first connecting hole 142. The end of the inner core rod 12 away from the tendon anchor 2 is passed through the slide groove 141 and connected to the first connecting hole 142. The outer rod handle 15 is provided with a second connecting hole 151. The end of the implant rod 13 away from the tendon anchor 2 is connected to the second connecting hole 151. The staff can hold the inner rod handle 14 or the outer rod handle 15. When the inner rod handle 14 and the outer rod handle 15 slide relative to each other, it is convenient to drive the inner core rod 12 to slide relative to the first guide hole 131 of the implant rod 13, thereby improving the convenience of operation.

[0045] Preferably, the inner wall of the chute 141 is provided with a first limiting protrusion 143, and the outer wall of the outer rod handle 15 is provided with a second limiting protrusion 152. The second limiting protrusion 152 is located between the first limiting protrusion 143 and the bottom of the chute 141. When the inner core rod 12 is disengaged from the second guide hole 21, the first limiting protrusion 143 is used to stop the second limiting protrusion 152. During the process of pulling out the inner rod handle 14, the inner core rod 12 is pulled out, and the outer rod handle 15 and the implant rod 13 remain stationary. When the inner core rod 12 is disengaged from the second guide hole 21, the first limiting protrusion 143 stops the second limiting protrusion 152, and the inner rod handle 14 continues to be pulled out. At this time, the inner rod handle 14 and the outer rod handle 15 are pulled out together, thereby achieving the separation of the implant 1 and the tendon anchor 2.

[0046] In this embodiment, the first limiting protrusion 143 and the second limiting protrusion 152 are both annular bosses, and the cross-section of the first limiting protrusion 143 and the second limiting protrusion 152 is a trapezoidal barb structure. During assembly, the outer rod handle 15 and the inner rod handle 14 are coaxially assembled, and the outer rod handle 15 and the inner rod handle 14 are interference assembled under the action of pressure. The outer rod handle 15 and the inner rod handle 14 are plastically deformed so that the second limiting protrusion 152 passes through the first limiting protrusion 143. After the second limiting protrusion 152 passes, the outer rod handle 15 and the inner rod handle 14 restore their deformation, thereby realizing the connection between the outer rod handle 15 and the inner rod handle 14, making it difficult for the two to be disassembled.

[0047] Further preferably, the outer rod handle 15 is provided with a disc portion 153. When the implant rod 13 abuts the fixing seat 22, the disc portion 153 stops the notch end surface of the slide groove 141. On the one hand, the first limiting protrusion 143 is located between the disc portion 153 and the second limiting protrusion 152 to prevent the outer rod handle 15 from separating from the inner rod handle 14. On the other hand, during the implantation process, when the inner rod handle 14 is struck, it abuts the disc portion 153, facilitating the transmission of the striking force applied to the inner rod handle 14 to the outer rod handle 15, and then to the tendon anchor 2 via the head of the outer rod handle 15. In this embodiment, the diameter of the disc portion 153 matches the outer diameter of the inner rod handle 14.

[0048] In this embodiment, the first end of the inner core rod 12 is provided with a third connecting hole 121, and the drill rod 11 is connected to the third connecting hole 121, specifically by welding. In other embodiments, the drill rod 11 and the inner core rod 12 can also be integrally formed.

[0049] Preferably, the outer wall of the inner handle 14 is provided with an anti-slip structure 144, and the outer wall of the inner handle 14 forms a grip portion, which increases the friction between the hand and the grip portion when the inner handle 14 is pulled out. In this embodiment, the anti-slip structure 144 includes a plurality of bosses or grooves arranged around the outer wall of the inner handle 14.

[0050] Furthermore, if Figure 4 and Figure 5 As shown, the barb protrusion 231 on the side wall of the nail body 23 is fin-shaped. In this embodiment, the side wall of the nail body 23 is provided with two barb protrusions 231, which enable the nail body 23 of the tendon anchor 2 to be barbed inside the tendon after implantation to prevent it from coming out.

[0051] Preferably, the width of the cross-section of the barb protrusion 231 along the radial direction of the nail body 23 gradually decreases from the base to the top. The cross-section of the barb protrusion 231 along the radial direction of the nail body 23 is a trapezoidal structure. On the one hand, during the implantation of the tendon anchor 2 into the tendon, it facilitates the expansion of the tendon entrance without cutting the tendon; on the other hand, it increases the connection strength between the barb protrusion 231 and the nail body 23.

[0052] In this embodiment, the fixing seat 22 is provided with a plurality of claws 221 extending toward one side of the nail body 23. Specifically, the fixing seat 22 is a three-claw structure, and the claws 221 can fix the patch and connect the patch to the tendon anchor, and its implantation positioning point can be precisely controlled.

[0053] Further preferably, the end of the nail body 23 away from the fixing seat 22 is truncated cone-shaped. The circular cross-section of the end of the nail body 23 away from the fixing seat 22 gradually decreases, which facilitates the implantation of the nail body 23 into the tendon.

[0054] It should be noted that if Figure 1-Figure 5 As shown, this embodiment also provides the working principle of the tendon anchor implantation system. When the tendon anchor 2 needs to be implanted into the rotator cuff, the drill rod 11 is used to pierce the tendon tissue first, and an implantation path is opened in advance for the implantation of the tendon anchor 2; the fixing seat 22 of the tendon anchor 2 contacts the head end of the implantation rod 13, axially knocks the bottom end face of the gripping portion of the inner rod handle 14, and its axial force is transmitted to the head end of the implantation rod 13, indirectly acting on the fixing seat 22 of the tendon anchor 2, so that the tendon anchor 2 is implanted. into the tendon; after the tendon anchor 2 is completely implanted in the tendon, the claw 221 of the fixing seat 22 connects the patch and the tendon anchor together, and the gripping portion of the inner rod handle 14 is pulled back axially. At the same time, the outer rod handle 15 remains fixed, causing the tendon anchor 2 to be subjected to an inward resistance force, which facilitates the pushing out of the inner rod, and the tendon anchor 2 is not easily pulled out when the implanter 1 is pulled out; at this time, since the nail body 23 of the tendon anchor 2 has a barb structure, the tendon anchor 2 will not be pulled out, and the implantation of the tendon anchor 2 is completed.

[0055] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A tendon anchor implantation system, characterized in that: include: An implanter (1) comprises an inner core rod (12), an implant rod (13) and a drill rod (11), wherein the implant rod (13) is provided with a first guide hole (131); A tendon anchor (2), wherein the tendon anchor (2) is provided with a penetrating second guide hole (21), the first end of the inner core rod (12) is passed through the first guide hole (131) and the second guide hole (21), one end of the drill rod (11) is connected to the first end of the inner core rod (12), and the other end is conical and extends out of the second guide hole (21); The tendon anchor (2) comprises a fixing seat (22) and a nail body (23) connected to each other, the implant rod (13) abuts against the fixing seat (22), the fixing seat (22) is used to fix the patch, and the side wall of the nail body (23) is provided with a barbed protrusion (231).

2. The tendon anchor implant system according to claim 1, characterized in that: The implanter (1) further comprises an inner rod handle (14) and an outer rod handle (15), wherein the inner rod handle (14) is provided with a slide groove (141), and the outer rod handle (15) is slidably connected in the slide groove (141); The bottom of the chute (141) is provided with a first connecting hole (142); one end of the inner core rod (12) away from the tendon anchor (2) is passed through the chute (141) and connected to the first connecting hole (142); The outer rod handle (15) is provided with a second connection hole (151), and one end of the implant rod (13) away from the tendon anchor (2) is connected to the second connection hole (151).

3. The tendon anchor implantation system according to claim 2, characterized in that: The inner wall of the slide groove (141) is provided with a first limiting protrusion (143), and the outer wall of the outer rod handle (15) is provided with a second limiting protrusion (152). The second limiting protrusion (152) is located between the first limiting protrusion (143) and the bottom of the slide groove (141). When the inner core rod (12) is separated from the second guide hole (21), the first limiting protrusion (143) is used to stop the second limiting protrusion (152).

4. The tendon anchor implantation system according to claim 2, characterized in that: The outer rod handle (15) is provided with a disc portion (153). When the implant rod (13) abuts against the fixing seat (22), the disc portion (153) blocks the notch end surface of the slide groove (141).

5. The tendon anchor implantation system according to claim 1, characterized in that: The drill rod (11) and the inner core rod (12) are integrally formed; or A third connecting hole (121) is provided at the first end of the inner core rod (12), and the drill rod (11) is connected to the third connecting hole (121).

6. The tendon anchor implantation system according to claim 2, characterized in that: The outer wall of the inner rod handle (14) is provided with an anti-slip structure (144).

7. The tendon anchor implantation system according to any one of claims 1 to 6, characterized in that: The barbed protrusion (231) is in the shape of a fish fin.

8. The tendon anchor implantation system according to any one of claims 1 to 6, characterized in that: The width of the cross section of the barb protrusion (231) along the radial direction of the nail body (23) gradually decreases from the root to the top.

9. The tendon anchor implantation system according to any one of claims 1 to 6, characterized in that: The fixing seat (22) is provided with a plurality of claws (221) extending toward one side of the nail body (23).

10. The tendon anchor implantation system according to any one of claims 1 to 6, characterized in that: One end of the nail body (23) away from the fixing seat (22) is in a truncated cone shape.

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