A flexible external anchor insertion mechanism

Abstract

This invention provides a flexible external anchor implantation mechanism, relating to the field of medical device technology, to solve the problem that simple linear implantation in existing technologies cannot reach the site of repair. The flexible external anchor implantation mechanism includes a handle, an outer tube, and an inner tube. The handle is located on the outer side of the tail end of the outer tube. The outer tube has a hollow structure, and the inner tube is located within the internal cavity of the outer tube and is coaxially arranged with the outer tube. The front end of the inner tube extends to the outer side of the outer tube. A strip-shaped semi-opening is provided on the outer tube, and the internal cavity of the outer tube communicates with the outside of the outer tube through the strip-shaped semi-opening. The strip-shaped semi-opening is arranged along the length of the sidewall of the outer tube, and the outer tube can be bent at the strip-shaped semi-opening. The flexible external anchor implantation mechanism of this invention can be adjusted according to different clinical needs, allowing for changes in the implantation angle and direction of the anchor to reach the site of repair.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a flexible external anchor implantation mechanism. Background Technology

[0002] When soft tissue injuries occur in joints, the soft tissue is torn from the bone and needs repair. Clinically, anchors are commonly used to fix the injured tendon stump to the bone. Bone anchors are implantable devices commonly used in sports medicine orthopedic surgery to fix soft tissue separated from the bone to the bone. During the surgery, a bone tunnel is first created in the bone using a punch. An anchor is then inserted under the cortical bone using an anchor inserter, fixing the sutures to the bone. Sutures are then used to firmly fix the avulsed or torn soft tissue to the bone surface, promoting healing between the soft tissue and bone, thereby achieving the purpose of repairing and fixing tendon avulsion injuries.

[0003] In clinical practice, anchors are mainly used for soft tissue repair and reconstruction in three ways: internal row knot fixation, knotless fixation combining internal and external rows, and knotless fixation with external rows. External row anchors, also known as knotless fixation anchors, work by using a suture hole to bring the suture along, adjusting the tension, and using the anchor body to compress and fix the suture.

[0004] Existing implantation devices are linear, and there are two main methods for nail implantation: screwing in and tapping in. The surgeon chooses to use linear screwing or tapping depending on the implantation site under arthroscopy. The external anchor implantation method is relatively simple. For arthroscopic ligament injuries, which are more complex, simple linear implantation cannot be achieved. The arthroscopic approach cannot reach the area to be repaired. The existing external anchor structure cannot meet clinical needs. Summary of the Invention

[0005] The purpose of this invention is to provide a flexible external anchor implantation mechanism to solve the problem that simple linear implantation in the prior art cannot reach the site to be repaired. The flexible external anchor implantation mechanism of this invention can be adjusted according to the needs of different clinical use angles. Clinically, it can change the implantation angle and direction of the anchor to reach the site to be repaired, solving a series of problems such as the difficulty of arthroscopic access, facilitating the surgeon's operation, and improving surgical efficiency.

[0006] The present invention provides a flexible external anchor implantation mechanism, comprising a handle, an outer tube, and an inner tube. The handle is disposed on the outer side of the tail end of the outer tube. The outer tube has a hollow structure. The inner tube is disposed in the internal cavity of the outer tube and is coaxially disposed with the outer tube. The front end of the inner tube extends to the outer side of the outer tube. A strip-shaped semi-opening is provided on the outer tube. The internal cavity of the outer tube communicates with the outside of the outer tube through the strip-shaped semi-opening. The strip-shaped semi-opening is disposed along the length direction of the side wall of the outer tube. The outer tube can be bent at the strip-shaped semi-opening.

[0007] In a preferred embodiment of the present invention, a tail cavity is provided between the tail end of the inner tube and the tail end of the outer tube. The handle, the outer tube and the inner tube are connected by a sliding connection mechanism. The sliding connection mechanism enables the outer tube to move forward relative to the handle and the inner tube, so that the tail end of the outer tube compresses the tail cavity and moves closer to the tail end of the inner tube.

[0008] As a preferred embodiment of the present invention, the tail end of the outer tube extends to the outside of the handle and a limiting push handle is connected to the outside of the handle. The limiting push handle is spaced apart from the tail end of the handle. A cap is provided between the limiting push handle and the tail end of the handle. The cap is locked to the outside of the outer tube and restricts the limiting push handle from moving toward the tail end of the handle.

[0009] As a preferred embodiment of the present invention, the sliding connection mechanism includes a pin, and multiple sets of adjustment holes corresponding to both sides of the outer tube are provided on the outer tube. The adjustment holes include pin holes and sliding holes. The sliding holes are strip-shaped and arranged along the length direction of the outer tube. The pin holes are respectively arranged at both ends of the sliding holes and communicate with the sliding holes. Multiple through holes are provided on the inner tube along its radial direction. A slot and an outer tube placement groove are provided in the handle. The slot and the outer tube placement groove are arranged perpendicularly. The tail end of the outer tube passes through the outer tube placement groove. The pin is inserted into the slot and passes through the pin hole and the through hole.

[0010] As a preferred embodiment of the present invention, a plurality of wire-locking grooves are provided on both sides of the handle head end, and the wire-locking grooves are V-shaped structures with the openings facing the sides.

[0011] As a preferred embodiment of the present invention, the strip-shaped semi-opening is disposed on the outer tube in front of the adjusting hole, and the outer tube is bent at the strip-shaped semi-opening at an angle of α, where α is 15°-45°.

[0012] As a preferred embodiment of the present invention, the inner tube includes a connecting section, a transition section, a working section, and a mating section. The through hole is disposed on the connecting section. The transition section connects the connecting section and the working section and its diameter gradually decreases from the connecting section to the working section. The diameter of the working section is smaller than the diameter of the connecting section. The mating section is connected to the head end of the working section and is used to mate with the outer cable hole.

[0013] As a preferred embodiment of the present invention, the handle includes a first housing and a second housing, the outer tube is disposed between the first housing and the second housing, and the first housing and the second housing are symmetrically arranged and detachably connected.

[0014] As a preferred embodiment of the present invention, the outer tube is made of stainless steel and the inner tube is made of solid nickel-titanium alloy.

[0015] As a preferred embodiment of the present invention, a depth limit mark is provided at the head end of the outer tube.

[0016] Compared with the prior art, the present invention has the following positive effects:

[0017] The flexible external anchor implantation mechanism provided by this invention includes a handle, an outer tube, and an inner tube. The handle is located on the outer side of the tail end of the outer tube. The outer tube has a hollow structure, and the inner tube is located in the internal cavity of the outer tube and is coaxially arranged with the outer tube. The front end of the inner tube extends to the outer side of the outer tube. A strip-shaped semi-opening is provided on the outer tube, and the internal cavity of the outer tube communicates with the outside of the outer tube through the strip-shaped semi-opening. The strip-shaped semi-opening is arranged along the length direction of the side wall of the outer tube, and the outer tube can be bent at the strip-shaped semi-opening. In use, after the handle, outer tube, and inner tube are installed, an angle adjustment tool is used to set the outer tube of the implantation mechanism to the required angle according to the angle requirements of the clinical implantation site. This allows the outer tube to bend at the required angle at the strip-shaped semi-opening, making it easier to implant the anchor into the target site. The strip-shaped semi-opening on the outer tube makes it easy to bend to different angles to adjust the bending angle of the outer tube. It can be adjusted according to the needs of different clinical use angles. Clinically, it can change the implantation angle and direction of the anchor to reach the site to be repaired, solving a series of problems such as the difficulty of arthroscopic access, facilitating the surgeon's operation, and improving surgical efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front view of the flexible external anchor implantation mechanism of the present invention;

[0020] Figure 2 for Figure 1 Cross-sectional view of AA;

[0021] Figure 3 This is a top view of the flexible external anchor insertion mechanism of the present invention;

[0022] Figure 4 for Figure 3 Cross-sectional view of BB;

[0023] Figure 5 This is a top view of the handle in this invention;

[0024] Figure 6 for Figure 5 Cross-sectional view of CC;

[0025] Figure 7 This is a schematic diagram of the flexible external anchor insertion mechanism of the present invention when the handle is open;

[0026] Figure 8 This is a schematic diagram of the outer tube in this invention;

[0027] Figure 9 This is a schematic diagram of the inner tube in this invention;

[0028] Figure 10 This is a schematic diagram of the structure of the flexible external anchor insertion mechanism of the present invention when installing anchors.

[0029] In the diagram: 1. Handle; 11. Outer tube placement slot; 12. Slot; 13. Cable clamping slot; 14. First housing; 15. Second housing; 2. Outer tube; 21. Limiting push handle; 22. Adjustment hole; 221. Pin hole; 222. Moving sliding hole; 23. Depth limit mark; 24. Internal cavity; 25. Strip-shaped semi-opening; 3. Inner tube; 31. Connecting section; 311. Through hole; 32. Transition section; 33. Working section; 331. Marking line; 34. Mating section; 4. Anchor nail; 5. Pin; 6. Cap; 7. Tail cavity; 8. Outer cable routing hole. Detailed Implementation

[0030] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying it, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] Example 1:

[0034] This embodiment provides a flexible external anchor insertion mechanism, such as... Figures 1-10 As shown, the device includes a handle 1, an outer tube 2, and an inner tube 3. The handle 1 is located on the outer side of the tail end of the outer tube 2. The outer tube 2 has a hollow structure. The inner tube 3 is located in the internal cavity 24 of the outer tube 2 and is coaxially arranged with the outer tube 2. The front end of the inner tube 3 extends to the outer side of the outer tube 2. A strip-shaped semi-opening 25 is provided on the outer tube 2. The internal cavity 24 of the outer tube 2 communicates with the outside of the outer tube 2 through the strip-shaped semi-opening 25. The strip-shaped semi-opening 25 is arranged along the length of the side wall of the outer tube 2, and the outer tube 2 can be bent at the strip-shaped semi-opening 25.

[0035] In this embodiment, the external anchor implantation mechanism, after the handle 1, outer tube 2, and inner tube 3 are installed, is adjusted using an angle adjustment tool according to the angle requirements of the clinical implantation site. This allows the outer tube 2 to bend at the required angle at the semi-opening 25, facilitating the implantation of the anchor to the target site. The semi-opening 25 on the outer tube 2 in this embodiment allows it to be easily bent at different angles, adjusting the bending angle according to different clinical needs. Clinically, this allows for changing the implantation angle and direction of the anchor to reach the repaired site, solving a series of problems such as the difficulty of arthroscopic access, facilitating surgical operations, and improving surgical efficiency.

[0036] Preferably, such as Figure 2 and Figure 4 As shown, the tail end of the inner tube 3 is shorter than the tail end of the outer tube 2, so that a tail cavity 7 is provided between the tail ends of the inner tube 3 and the outer tube 2. The tail cavity 7 can extend and retract as the outer tube 2 and the inner tube 3 move relative to each other. The handle 1, the outer tube 2 and the inner tube 3 are connected by a sliding connection mechanism. The sliding connection mechanism allows the outer tube 2 to move forward relative to the handle 1 and the inner tube 3, so that the tail end of the outer tube 2 compresses the tail cavity 7 and moves closer to the tail end of the inner tube 3.

[0037] Preferably, the outer tube 2 extends to the outside of the handle 1 at its tail end and is connected to a limiting push handle 21 on the outside of the handle 1. The limiting push handle 21 is spaced apart from the tail end of the handle 1, and a cap 6 is provided between the limiting push handle 21 and the tail end of the handle 1. The cap 6 is engaged with the outside of the outer tube 2, and the cap 6 restricts the movement of the limiting push handle 21 toward the tail end of the handle 1. The length of the tail cavity 7 is not less than the distance between the limiting push handle 21 and the tail end of the handle 1. The cap 6 is used to connect the outer tube limiting push handle 21 and to restrict the forward movement of the outer tube 2 before the anchor nail body is inserted, preventing the anchor nail body from being knocked off the inner tube 3 when the outer tube 2 moves forward relative to the inner tube 3.

[0038] Preferably, such as Figure 4 , Figure 6 and Figure 7 As shown, the sliding connection mechanism includes a pin 5. Multiple sets of adjustment holes 22 are provided on the outer tube 2, corresponding to each other on both sides of the outer tube 2. Each adjustment hole 22 includes a pin hole 221 and a sliding hole 222. The sliding hole 222 is strip-shaped and extends along the length of the outer tube 2. The pin holes 221 are located at both ends of the sliding hole 222 and communicate with it. Multiple through holes 311 are provided on the inner tube 3, arranged radially. A slot 12 and an outer tube placement groove 11 are provided inside the handle 1. The slot 12 is perpendicular to the outer tube placement groove 11. The tail end of the outer tube 2 passes through the outer tube placement groove 11. The pin 5 is inserted into the slot 12 and passes through the pin hole 221 and the through hole 311, thereby connecting the inner tube 3 and the outer tube 2 to the handle 1. The pin hole 221 is a circular groove with a diameter larger than the width of the sliding hole 222. Pin 5 is a cylindrical structure made of stainless steel and is used to connect the inner tube 3, the outer tube 2 and the handle 1.

[0039] When the cap 6 is engaged between the limiting push handle 21 and the tail end of the handle 1, the pin 5 is in the pin hole 221 near the front end of the adjusting hole 22. After the cap 6 is removed, the limiting push handle 21 is tapped, causing the outer tube 2 to move forward relative to the inner tube 3 and the handle 1. The pin 5 slides from the pin hole 221 at the front end into the sliding slide hole 222, and then slides into the pin hole 221 at the rear end.

[0040] Preferably, multiple thread-holding grooves 13 are provided on both sides of the handle 1 end, and the thread-holding grooves 13 are V-shaped structures with their openings facing the sides. The thread-holding grooves 13 are used to fix the sewing thread. The V-shaped structure of the thread-holding grooves 13 facilitates the insertion and fixation of the sewing thread.

[0041] Preferably, such as Figure 8As shown, a strip-shaped semi-opening 25 is provided on the outer tube 2 in front of the adjusting hole 22. The outer tube 2 is bent at an angle α at the strip-shaped semi-opening 25, where α is 15°-45°. The outer tube 2 can be bent toward the side with the strip-shaped semi-opening 25 or toward the side away from the strip-shaped semi-opening 25. The bending angle not only suits the operational needs but also facilitates control of the outer tube 2 as it is driven forward.

[0042] Preferably, such as Figure 9 As shown, the inner tube 3 includes a connecting section 31, a transition section 32, a working section 33, and a mating section 34. A through hole 311 is provided on the connecting section 31, which is used to connect with the outer tube 2 and the handle 1. The transition section 32 connects the connecting section 31 and the working section 33, and its diameter gradually decreases from the connecting section 31 to the working section 33. The diameter of the working section 33 is smaller than the diameter of the connecting section 31. The mating section 34 is connected to the head end of the working section 33 and is used to mate with the outer cable hole 8. The working section is used to insert the anchor nail body. The mating section 34 can be a threaded structure or a tapered column structure, used to mate with the outer cable hole 8. A marking line 331 is provided on the working section 33.

[0043] Preferably, the handle 1 includes a first housing 14 and a second housing 15, with an outer tube 2 disposed between the first housing 14 and the second housing 15. The first housing 14 and the second housing 15 are symmetrically arranged and detachably connected. The pin 5 passes through the first housing 14 and the second housing 15.

[0044] Preferably, the outer tube 2 is made of stainless steel, which has good rigidity, while the inner tube 3 is made of solid nickel-titanium alloy, which has high strength, high plasticity, corrosion resistance, good stability, and good biocompatibility. Nickel-titanium alloy combines the unique properties of shape memory and superelasticity, which are closely related. Shape memory allows the nickel-titanium alloy to deform at a certain temperature and then return to its original shape when heated to the transition temperature. Alternatively, the inner tube can also be made of stainless steel, with an "S"-shaped perforation at the front of the connecting section 31 of the inner tube, so that the inner tube deforms with the outer tube 2 when the outer tube 2 is bent.

[0045] Preferably, such as Figure 10 As shown, a depth limit mark 23 is provided at the head end of the outer tube 2. The head end of the outer tube 2 is conical, and the depth limit mark 23 is located at the front end of the conical shape of the outer tube 2.

[0046] In this embodiment, after installing the handle 1, outer tube 2, and inner tube 3, the outer tube of the implantation mechanism is adjusted to the required angle using an angle adjustment tool according to the angle requirements of the clinical implantation site. The anchor 4 is installed on the transition section 32 of the inner tube 3, with the tail end of the anchor 4 abutting against the head end of the outer tube 2. The outer suture hole 8 is connected to the mating section 34 at the head end of the inner tube 3. The suture used for suturing and fixation is inserted into the outer suture hole 8, and the other end of the suture is locked in the suture groove 13 of the handle 1. The suture portion of the outer suture hole 8 at the front end of the implantation mechanism is inserted into the pre-drilled hole. The tension of the suture and the angle of the implantation mechanism are adjusted. When the marking line 331 reaches the position of the pre-drilled hole, the cap 6 is removed, and the outer tube 2 is tapped. This causes the head end of the outer tube 2 to squeeze the anchor 4 forward from the transition section 32 of the inner tube and knock the anchor 4 into the pre-drilled hole. When the anchor 4 is knocked into the depth limit mark 23 on the outer tube to the entrance of the pre-drilled hole, the implantation mechanism is removed to complete the fixation.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications and improvements made by those skilled in the art without departing from the inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flexible external anchor insertion mechanism, characterized in that, The device includes a handle (1), an outer tube (2), and an inner tube (3). The handle (1) is located on the outside of the tail end of the outer tube (2). The outer tube (2) has a hollow structure. The inner tube (3) is located in the internal cavity (24) of the outer tube (2) and is coaxially arranged with the outer tube (2). The front end of the inner tube (3) extends to the outside of the outer tube (2). A strip-shaped semi-opening (25) is provided on the outer tube (2). The internal cavity (24) of the outer tube (2) is connected to the outside of the outer tube (2) through the strip-shaped semi-opening (25). The strip-shaped semi-opening (25) is arranged along the length direction of the side wall of the outer tube (2). The outer tube (2) can be bent at the strip-shaped semi-opening (25). A tail cavity (7) is provided between the tail end of the inner tube (3) and the tail end of the outer tube (2). The handle (1), the outer tube (2) and the inner tube (3) are connected by a sliding connection mechanism. The sliding connection mechanism enables the outer tube (2) to move forward relative to the handle (1) and the inner tube (3), so that the tail end of the outer tube (2) compresses the tail cavity (7) and moves closer to the tail end of the inner tube (3). The sliding connection mechanism includes a pin (5). Multiple sets of adjustment holes (22) are provided on the outer tube (2) and are correspondingly provided on both sides of the outer tube (2). The adjustment hole (22) includes a pin hole (221) and a sliding hole (222). The sliding hole (222) is strip-shaped and is provided along the length direction of the outer tube (2). The pin hole (221) is respectively provided at both ends of the sliding hole (222) and communicates with the sliding hole (222). Multiple through holes (311) are provided on the inner tube (3) and are arranged radially thereon. A slot (12) and an outer tube placement groove (11) are provided in the handle (1). The slot (12) is perpendicular to the outer tube placement groove (11). The tail end of the outer tube (2) passes through the outer tube placement groove (11). The pin (5) is inserted into the slot (12) and passes through the pin hole (221) and the through hole (311).

2. The flexible external anchor insertion mechanism according to claim 1, characterized in that, The outer tube (2) extends to the outside of the handle (1) at its tail end and is connected to a limiting push handle (21) on the outside of the handle (1). The limiting push handle (21) is spaced apart from the tail end of the handle (1). A cap (6) is provided between the limiting push handle (21) and the tail end of the handle (1). The cap (6) is locked on the outside of the outer tube (2) and restricts the limiting push handle (21) from moving toward the tail end of the handle (1).

3. The flexible external anchor insertion mechanism according to claim 1, characterized in that, Multiple wire-locking grooves (13) are provided on both sides of the head end of the handle (1), and the wire-locking grooves (13) are V-shaped structures with the opening facing the side.

4. The flexible external anchor insertion mechanism according to claim 1, characterized in that, The strip-shaped semi-opening (25) is provided on the outer tube (2) in front of the adjustment hole (22), and the angle at which the outer tube (2) bends at the strip-shaped semi-opening (25) is α, where α is 15°-45°.

5. The flexible external anchor insertion mechanism according to claim 1, characterized in that, The inner tube (3) includes a connecting section (31), a transition section (32), a working section (33), and a mating section (34). The through hole (311) is provided on the connecting section (31). The transition section (32) is connected between the connecting section (31) and the working section (33) and its diameter gradually decreases from the connecting section (31) to the working section (33). The diameter of the working section (33) is smaller than the diameter of the connecting section (31). The mating section (34) is connected to the head end of the working section (33) and is used to mate with the outer cable hole (8).

6. The flexible external anchor insertion mechanism according to claim 1, characterized in that, The handle (1) includes a first housing (14) and a second housing (15), and the outer tube (2) is disposed between the first housing (14) and the second housing (15). The first housing (14) and the second housing (15) are symmetrically arranged and detachably connected.

7. The flexible external anchor insertion mechanism according to claim 1, characterized in that, The outer tube (2) is made of stainless steel, and the inner tube (3) is made of solid nickel-titanium alloy.

8. The flexible external anchor insertion mechanism according to claim 1, characterized in that, The outer tube (2) is provided with a depth limit mark (23) at its head end.

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