Drag hook implanting device

Abstract

The utility model relates to a drag hook implanting device which comprises an injector and an implant prearranged in the injector. The pushing injector comprises a needle cylinder body, a puncture needle fixed to the end of the needle cylinder body and a pushing piston arranged in the needle cylinder body in a sliding mode. The implant comprises a drag hook used for hooking an anterior capsule opening of a lens capsular bag, a suture line connected with the drag hook and a straight needle connected with the tail end of the suture line. Wherein the far end of the pushing piston is provided with a pushing body capable of extending into the puncture needle, the implant is preset in the mode that the drag hook is arranged in the puncture needle through the pushing body, the suture is reserved in the needle cylinder body, the straight needle is detachably arranged on the pushing piston, and the straight needle is arranged in the needle cylinder body. The pushing body is used for pushing the drag hook to the outside of the puncture needle. Through the arrangement, the operation convenience is improved, and meanwhile the risk of damaging the intraocular structure is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lens capsule fixation technology, specifically to a retractor implantation device. Background Technology

[0002] Lens capsular retractor implantation is a treatment technique for partial or complete lens dislocation, and is especially suitable for complex cases such as lens suspensory ligament rupture and laxity.

[0003] In conventional techniques, when performing retractor implantation, a hook-like structure is often used to hold the anterior capsular opening of the lens capsule in the dislocated area inside the eye. The other end is connected to a needle, which is then passed through the eye via an auxiliary instrument and punctured before being brought out of the eye and fixed with sutures on the scleral surface.

[0004] However, this method is quite complicated, and the needle attached to the suture goes through the eye, which carries a high risk. Utility Model Content

[0005] This invention provides a retractor implantation device to solve the problems of complex and high-risk existing retractor implantation procedures.

[0006] This utility model discloses a hook implantation device, including an injector and an implantation body preset in the injector; the injector includes a syringe body, a puncture needle fixed to the end of the syringe body, and a push piston slidably disposed in the syringe body; the implantation body includes a hook for hooking the anterior opening of the lens capsule, a suture connected to the hook, and a straight needle connected to the end of the suture.

[0007] The distal end of the advance piston has a pusher that can extend into the puncture needle. The implant is pre-set so that the hook is inserted into the puncture needle via the pusher. The suture is reserved in the syringe body. The straight needle is detachably placed on the advance piston. The pusher is used to push the hook to the outside of the puncture needle.

[0008] Furthermore, the thrust piston includes a piston body and a push rod perpendicularly connected to the piston body, the pusher is vertically fixed to the end of the piston body away from the push rod, and the straight needle is detachably fixed to the push rod.

[0009] Furthermore, the push rod has a fixing seat for fixing the straight needle.

[0010] Furthermore, the fixing base includes an insert for the straight needle to pass through and an insertion body for fixing the needle tip.

[0011] Furthermore, the piston body has a wiring groove at its edge that extends along the thickness direction.

[0012] Furthermore, the implant is made of polypropylene, and the hook is formed by folding, heating, and fixing.

[0013] Furthermore, when the hook is pre-placed inside the puncture needle, the free end of the hook abuts against the end of the pusher.

[0014] Furthermore, the suture is reserved between the pusher and the piston body and / or between the piston body and the push rod, and the reserved length of the suture is sufficient to allow the push piston to be pulled out from the syringe body after the hook is fixed.

[0015] Furthermore, the pusher body has a tubular structure, and a threading groove is provided at the end of the pusher body near the piston body, which communicates with the internal pipe of the pusher body. The size of the threading groove meets the requirements for the hook to pass through.

[0016] Furthermore, the pusher body has a columnar structure, and the side wall of the pusher body has a groove that is parallel to the axis and recessed inward. The groove extends through the pusher body along its length, and the size of the groove meets the insertion requirements of the hook and the sewing thread.

[0017] The retractor implantation device provided by this utility model can achieve the following technical effects:

[0018] 1. This utility model achieves the fixation of the capsule membrane by pre-setting the implant in the injector and pushing the hook of the implant to the outside of the puncture needle through the pusher on the piston. Compared with the prior art, only puncture is required, and the puncture needle can assist the hook in rotating and extending, reducing the difficulty of the surgical operation.

[0019] 2. This utility model preserves the suture of the implant inside the syringe body and detachably fixes the straight needle at the tail end of the implant to the push piston, so that the suture and straight needle are always outside the eye during operation, avoiding damage to the eye by the straight needle and reducing the risk of surgery.

[0020] The above general description and the description below are exemplary and explanatory only, and are not intended to limit the present invention. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrative descriptions and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are considered similar elements, and wherein:

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the hook implantation device in Embodiment 1 of this utility model;

[0023] Figure 2 This is a half-sectional three-dimensional structural diagram of the hook implantation device in Embodiment 1 of this utility model;

[0024] Figure 3 This is a schematic diagram of the implant structure in Embodiment 1 of this utility model;

[0025] Figure 4 This is a schematic diagram of the implant pre-placed on the push piston in Embodiment 1 of this utility model;

[0026] Figure 5 This is a schematic diagram of the implant pre-placed in the injector in Embodiment 1 of this utility model;

[0027] Figure 6 In Embodiment 1 of this utility model Figure 2 A magnified view of part A;

[0028] Figure 7 In Embodiment 1 of this utility model Figure 4 A magnified view of section B;

[0029] Figure 8 In Embodiment 1 of this utility model Figure 5 A magnified view of a portion at point C;

[0030] Figure 9 This is a schematic diagram of the connection structure between the piston body and the pusher body in Embodiment 1 of this utility model;

[0031] Figure 10 In Embodiment 1 of this utility model Figure 9 A magnified view of a portion at point D;

[0032] Figure 11 This is a schematic diagram of the connection structure between the piston body and the pusher body in Embodiment 2 of this utility model;

[0033] Figure 12 In Embodiment 2 of this utility model Figure 11 A magnified view of point E in the image.

[0034] Figure label:

[0035] 1. Injector; 11. Syringe body; 12. Puncture needle; 13. Advance piston; 131. Pusher; 1311. Threading groove; 1312. Groove; 132. Piston body; 1321. Threading groove; 133. Push rod; 134. Fixing base; 1341. Insertion body; 1342. Insertion body; 2. Implant; 21. Retractor; 22. Suture; 23. Straight needle. Detailed Implementation

[0036] To provide a more detailed understanding of the features and technical content of the embodiments of this utility model, the implementation of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this utility model. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0037] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0038] In this embodiment of the invention, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of the invention and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of the invention according to the specific circumstances.

[0039] Furthermore, the terms "set," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0040] Unless otherwise stated, the term "multiple" means two or more, and "multiple groups" means two or more groups.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0042] Example 1

[0043] like Figures 1 to 10 As shown, this utility model discloses a retractor 21 implantation device, including an injector 1 and an implant 2 pre-installed in the injector 1; please refer to the following for details. Figure 2 In an embodiment of this invention, the injector 1 includes a syringe body 11, a puncture needle 12 fixed to the end of the syringe body 11, and a sliding piston 13 disposed within the syringe body 11. The injector 1 has a structure similar to a conventional syringe; the puncture needle 12 is detachably fixed within the syringe body 11, and the piston 13 can be pushed and pulled within the syringe body 11. Further details are omitted here. In an embodiment of this invention, the puncture needle 12 is a circular straight needle with an outer diameter of 0.5 mm, an inner diameter of 0.3-0.35 mm, and a length of 16 mm. In this embodiment, the wall of the puncture needle 12 is made as thin as possible while maintaining strength, thereby facilitating the delivery of the implant 2. Figure 3 As shown in the embodiment of this invention, the implant 2 includes a hook 21 for hooking onto the anterior opening of the lens capsule, a suture 22 connected to the hook 21, and a straight needle 23 connected to the tail end of the suture 22. In this embodiment, the outer diameter of the implant 2 is smaller than the inner diameter of the puncture needle 12 to facilitate the passage of the hook 21 through the puncture needle 12. The bending length of the hook 21 is 2-3 mm, and the specification of the suture 22 is 5-0 or 6-0. Here, 5-0 refers to the grading of the diameter of the suture 22 according to international standards. Taking the USP standard as an example, the diameter of 5-0 is 0.1-0.149 mm, and the diameter of 6-0 is 0.07-0.099 mm.

[0044] Please refer to the details. Figures 4 to 5 In an embodiment of this invention, the distal end of the push piston 13 has a pusher 131 that can extend into the puncture needle 12. The implant 2 is pre-set so that the hook 21 is inserted into the puncture needle 12 via the pusher 131. The suture 22 is pre-reserved in the syringe body 11. The straight needle 23 is detachably placed on the push piston 13. The pusher 131 is used to push the hook 21 to the outside of the puncture needle 12. It should be noted that the pusher 131 can have various forms, such as being cylindrical, with an outer diameter smaller than the inner diameter of the puncture needle 12, and capable of pushing the hook 21 out from inside the puncture needle 12. In the actual surgical procedure, the hook 21 is first pre-positioned on the pusher 131, and then the straight needle 23 is fixed on the push piston 13. The push piston 13 is then pushed into the syringe body 11, as shown in the image. Figure 5As shown, the retractor 21 is positioned inside the puncture needle 12, and the straight needle 23 and suture 22 are also located inside the syringe body 11. At this time, the advance piston 13 is not pushed to the top of the syringe body 11. The puncture operation is then performed, allowing the puncture needle 12 to make a small puncture in the cornea at a depth of 2mm corresponding to the lens dislocation area. The puncture needle 12 only needs to enter the eye to expose a small portion of the capsule. The advance piston 13 is then pushed further to expose the retractor 21, and then the entire syringe body 11 is pulled back. Hook 21 hooks onto the capsule, then retracts the syringe body 11 and pulls the push piston 13 out of the syringe body 11. Next, pull the suture 22 and straight needle 23 out of the syringe body 11. During this process, keep the hook 21 pulling on the capsule. Finally, use the straight needle 23 to puncture the scleral surface and tie the suture 22, so that the suture 22 pulls the hook 21 to maintain the traction on the capsule opening. Then cut off the remaining suture 22 together with the straight needle 23 to complete the operation.

[0045] In the above implementation, by pre-setting the implant 2 in the injector 1, the pusher 131 on the piston 13 pushes the hook 21 of the implant 2 to the outside of the puncture needle 12 to achieve the fixation of the capsule membrane. Compared with the prior art, only puncture is required, and the puncture needle 12 can assist the hook 21 in rotation and extension, reducing the difficulty of the surgical operation. Furthermore, in the embodiment of this utility model, by pre-leaving the suture 22 of the implant 2 inside the syringe body 11, and detachably fixing the straight needle 23 at the tail end of the implant 2 to the piston 13, the suture 22 and the straight needle 23 are always outside the eye during the operation, avoiding damage to the eye by the straight needle 23 and reducing the risk of surgery.

[0046] Alternatively, please continue to refer to Figure 4 In an embodiment of this utility model, the pushing piston 13 includes a piston body 132 and a push rod 133 perpendicularly connected to the piston body 132. A pushing body 131 is vertically fixed to the end of the piston body 132 away from the push rod 133, and a straight needle 23 is detachably fixed to the push rod 133. By vertically fixing the pushing body 131 to the piston body 132, the pushing force during pushing can be directly transmitted to the pushing body 131 through the push rod 133 and the piston body 132; furthermore, fixing the straight needle 23 to the push rod 133 can prevent the straight needle 23 from shaking during pushing.

[0047] In an embodiment of this utility model, to facilitate fixing the straight needle 23, the push rod 133 has a fixing seat 134 for fixing the straight needle 23. It should be noted that the fixing seat 134 for fixing the straight needle 23 can have various structural forms. For example, the straight needle 23 can be fixed by a snap-fit ​​method, that is, a gap is provided on the fixing seat 134 to allow the straight needle 23 to be snapped in. Alternatively, it can be implemented using other structural forms such as wrapping or insertion. Those skilled in the art can design it according to their needs. In one embodiment of this utility model, such as... Figure 6 As shown, the fixing base 134 includes an insertion body 1341 for a straight needle 23 to pass through and an insert body 1342 for fixing the needle tip. Specifically, the insertion body 1341 has a hole for the straight needle 23 to pass through, and the insert body 1342 can be made of a flexible material, so that after the straight needle 23 passes through the insertion body 1341, the needle tip is inserted into the insert body 1342. When it is necessary to remove the straight needle 23, simply pull the needle tip of the straight needle 23 out of the insert body 1342 and then remove it from the insertion body 1341, which is convenient to operate.

[0048] Optionally, such as Figure 7 As shown in the embodiment of this utility model, in order to avoid the stitch 22 getting stuck during the pushing and advancing piston 13, the piston body 132 has a thread groove 1321 that runs through the thickness direction at its edge. With this arrangement, the stitch 22 can be prevented from rubbing against the inner wall of the piston body 132 and the syringe body 11.

[0049] In this embodiment of the invention, the implant 2 is made of polypropylene, and the hook 21 is folded, heated, and fixed. Folding and heating polypropylene is existing technology and will not be elaborated here. This structural design allows the suture 22 and the hook 21 to be integrally formed, reducing connection points and improving the smoothness of the hook 21 passing through the puncture needle 12. In this embodiment of the invention, the suture 22 is made of non-absorbable polypropylene.

[0050] Optionally, such as Figure 8 As shown, when the hook 21 is pre-placed inside the puncture needle 12, the free end of the hook 21 abuts against the end of the pusher 131. That is, when the hook 21 is folded inside the puncture needle 12, its hook end abuts against the distal end of the pusher 131. As the pusher 131 moves toward the distal end of the puncture needle 12, its end can apply a pushing force to the hook 21, thereby driving the hook 21 to move inside the puncture needle. It should be noted here that the distal end refers to the end away from the operator.

[0051] Optionally, such as Figure 4As shown, the reserved position of the suture 22 can be between the pusher 131 and the piston body 132. By setting it in this way, the excessive pulling force on the hook 21 can be avoided when the pusher piston 13 is removed. Of course, in the embodiment of this utility model, since a thread groove 1321 is provided on the piston body 132, the suture 22 can also be reserved between the piston body 132 and the push rod 133. Specifically, it can be wrapped around the push rod 133, or it can be stored in the push rod 133 and the syringe body 11 in a reciprocating manner, or both reserved methods exist and a certain length of suture 22 is reserved at both the front end and the rear end of the piston body 132. Specifically, in the embodiment of this utility model, the reserved length of the suture 22 is sufficient to meet the distance required for the pusher piston 13 to be pulled out from the syringe body 11 after the hook 21 is fixed.

[0052] Please refer to Figure 9 and Figure 10 In some embodiments of this invention, the pusher body 131 has a tubular structure, and a threading groove 1311 communicating with the internal pipe of the pusher body 131 is provided at the end near the piston body 132. The size of the threading groove 1311 meets the requirements for the insertion of the hook 21. The tubular design improves the reliability of the suture 22 movement and prevents the suture 22 from being squeezed between the pusher body 131 and the inner wall of the puncture needle 12. In some embodiments of this invention, the inner diameter of the pusher body 131 is 0.1-0.12 mm, and of course, the inner diameter of the pusher body 131 is larger than the diameter of the suture 22. The threading groove 1311 facilitates the placement of the hook 21 and the removal of the suture 22 and the straight needle 23.

[0053] Example 2

[0054] This embodiment also proposes a hook 21 implantation device. The second embodiment is a further improvement based on the first embodiment, which improves the structural form of the pusher 131. The remaining parts of the implant 2 and the injector 1 are the same as in the first embodiment, and will not be described again here. The specific solution is as follows:

[0055] like Figure 11 and Figure 12As shown, the pusher body 131 has a columnar structure, and its sidewall has a groove 1312 that is parallel to the axis and recessed inward. The groove 1312 extends through the pusher body 131 along its length, and its size meets the insertion requirements of the hook 21 and the suture 22. The groove 1312 facilitates the placement and removal of the hook 21 and the suture 22. Furthermore, its design allows for a larger end face area of ​​the pusher body 131, improving the pushing effect on the hook 21 and preventing it from detaching. Additionally, the groove 1312 allows for a smaller diameter of the pusher body 131, providing more space within the puncture needle 12 and further reducing the risk of the suture 22 getting stuck.

[0056] The foregoing description and accompanying drawings fully illustrate embodiments of the present invention to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Some portions and features of some embodiments may be included or substituted for portions and features of other embodiments. Embodiments of the present invention are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A retractor implantation device, characterized in that, Includes an injector (1) and an implant (2) pre-installed in the injector (1); The injector (1) includes a syringe body (11), a puncture needle (12) fixed to the end of the syringe body (11), and a push piston (13) that can be slidably disposed in the syringe body (11); The implant (2) includes a hook (21) for hooking the anterior opening of the lens capsule, a suture (22) connected to the hook (21), and a straight needle (23) connected to the tail end of the suture (22); The distal end of the push piston (13) has a pusher (131) that can extend into the puncture needle (12). The implant (2) is preset so that the hook (21) is inserted into the puncture needle (12) via the pusher (131). The suture (22) is reserved in the syringe body (11). The straight needle (23) is detachably placed on the push piston (13). The pusher (131) is used to push the hook (21) to the outside of the puncture needle (12).

2. The retractor implantation device according to claim 1, characterized in that, The thrust piston (13) includes a piston body (132) and a push rod (133) perpendicularly connected to the piston body (132). The pusher (131) is vertically fixed to one end of the piston body (132) away from the push rod (133), and the straight needle (23) is detachably fixed to the push rod (133).

3. The retractor implantation device according to claim 2, characterized in that, The push rod (133) has a fixing seat (134) for fixing the straight needle (23).

4. The retractor implantation device according to claim 3, characterized in that, The fixing seat (134) includes an insert (1341) for the straight needle (23) to pass through and an insert (1342) for fixing the needle tip.

5. The retractor implantation device according to claim 2, characterized in that, The piston body (132) has a wiring groove (1321) that runs through the thickness direction at its edge.

6. The retractor implantation device according to claim 2, characterized in that, The implant (2) is made of polypropylene, and the hook (21) is formed by folding, heating and fixing.

7. The retractor implantation device according to claim 2, characterized in that, When the hook (21) is pre-placed inside the puncture needle (12), the free end of the hook (21) abuts against the end of the pusher (131).

8. The retractor implantation device according to claim 2, characterized in that, The suture (22) is reserved between the pusher (131) and the piston body (132) and / or between the piston body (132) and the push rod (133). The reserved length of the suture (22) is sufficient to allow the push piston (13) to be pulled out from the syringe body (11) after the hook (21) is fixed.

9. The retractor implantation device according to any one of claims 2 to 8, characterized in that, The pusher (131) has a tubular structure, and the pusher (131) has a threading groove (1311) at the end near the piston body (132) that communicates with the internal pipe of the pusher (131). The size of the threading groove (1311) meets the requirements for the hook (21) to pass through.

10. The retractor implantation device according to any one of claims 1 to 8, characterized in that, The pusher (131) has a columnar structure, and the side wall of the pusher (131) has a groove (1312) that is parallel to the axis and recessed inward. The groove (1312) extends through the pusher (131) along the length direction, and the size of the groove (1312) meets the insertion requirements of the hook (21) and the sewing thread (22).

Images