Introduction head and preloaded intraocular lens implant system

Abstract

The application provides an introduction head and a preloaded intraocular lens implant system. The introduction head comprises an introduction main body and a pressing piece structure. The introduction main body is provided with an opening groove and a push injection channel. The opening groove is communicated with the push injection channel. At least one section of the push injection channel gradually decreases in cross-sectional area along a first direction. The pressing piece structure is rotationally connected with the introduction main body. The pressing piece structure extends into the push injection channel through the opening groove. The pressing piece structure is used for abutting against the intraocular lens, so that the intraocular lens is bulged towards a side away from the pressing piece structure. The pressing piece structure is configured to be driven by the intraocular lens to rotate relative to the introduction main body. The preloaded intraocular lens implant system comprises a push injection sleeve, a push injection assembly and the introduction head. The introduction head is connected with the push injection sleeve. The push injection assembly is movably connected with the push injection sleeve. The introduction head and the preloaded intraocular lens implant system can improve the stability and safety of an intraocular lens implant process.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to an implantation head and a pre-loaded intraocular lens implantation system. Background Technology

[0002] An intraocular lens (IOL) is a special lens made of synthetic materials, implanted inside the eye to replace the natural lens that has become cloudy due to disease, thereby restoring the patient's vision. Currently, IOL implantation typically uses a guide tip for guidance. During implantation, the IOL curls under the guidance of the guide tip and unfolds upon removal, facilitating successful placement inside the eye. However, a problem exists: current guide tips often lack effective restraint structures, making it difficult to effectively control the curling direction of the IOL within the guide tip. This can lead to localized stress concentration within the guide tip, increasing the risk of reverse curling or flipping during implantation, thus compromising the stability and safety of the IOL implantation process. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an implantation head that can improve the stability and safety of intraocular lens implantation.

[0004] This application also proposes a pre-loaded intraocular lens implantation system having the aforementioned insertion head.

[0005] The inlet head according to the embodiments of this application includes an inlet body and a tablet compression structure;

[0006] The inlet body is provided with an opening groove and a injection channel. The opening groove is connected to the injection channel. Along the first direction, at least one section of the injection channel has a gradually decreasing cross-sectional area.

[0007] The tablet compression structure is rotatably connected to the injection body. The tablet compression structure extends into the injection channel through an opening groove. The tablet compression structure is used to abut against the intraocular lens so that the intraocular lens protrudes towards the side away from the tablet compression structure.

[0008] The compression structure is configured to rotate relative to the introducing body, driven by the intraocular lens.

[0009] The implant head according to the embodiments of this application has at least the following beneficial effects: the channel wall of the injection channel is used to guide the intraocular lens (IOL) to curl. As the cross-sectional area of ​​the injection channel decreases, the degree of curling of the IOL gradually increases. The compression structure is used to abut against the IOL, and in conjunction with the channel wall of the injection channel, it restricts the IOL so that the IOL protrudes towards the side away from the compression structure, effectively preventing the IOL from curling back or flipping within the injection channel. Furthermore, the compression structure is also configured to rotate relative to the implant body under the drive of the IOL, thereby abutting against the IOL and causing the IOL to curl in a preset direction. Therefore, the implant head of this application can improve the stability and safety of IOL implantation.

[0010] According to some embodiments of this application, the tableting structure includes a tableting body, a first connecting arm and a second connecting arm, both of which are rotatably connected to the inlet body;

[0011] The opening groove extends along the first direction, and the tableting body extends into the injection channel through the opening groove. Along the second direction, the first connecting arm is connected to one side of the tableting body, and the second connecting arm is connected to the other side of the tableting body. The first connecting arm, the second connecting arm, and the tableting body together define an avoidance space, which is connected to the opening groove. The first direction is perpendicular to the second direction.

[0012] According to some embodiments of this application, the tableting structure includes a hollow portion located within the injection channel.

[0013] According to some embodiments of this application, along the second direction, the opposite side walls of the tableting structure are interference-fitted with the groove wall of the opening groove, and the second direction is perpendicular to the first direction.

[0014] According to some embodiments of this application, the tablet compression structure includes a limiting portion that abuts against the outer peripheral wall of the inlet body and covers a portion of the opening groove.

[0015] According to some embodiments of this application, the injection channel includes a first section and a second section, the first section and the second section are connected, and along a first direction, at least one of the first section and the second section has a gradually decreasing cross-sectional area, and the side of the first section away from the second section is used to abut against the crystal support.

[0016] According to some embodiments of this application, the import body is provided with a limiting block, and the pressing structure is rotatably connected to the limiting block. The limiting block is used to press against the crystal support.

[0017] The pre-loaded intraocular lens implantation system according to the embodiments of this application includes an injection cannula, an injection rod assembly, and an inlet head as described in any of the above embodiments;

[0018] The injection sleeve is provided with an installation groove, a first through groove and a second through groove. The first through groove and the second through groove are both connected to the installation groove. Along the first direction, the first through groove, the installation groove and the second through groove are arranged in sequence.

[0019] A push rod assembly is provided along a first direction, passing through a first through groove, and is movably connected to a push sleeve.

[0020] Along the first direction, the guide head passes through the second through groove, and a portion of the guide head extends out of the second through groove to the side opposite to the mounting groove.

[0021] The pre-loaded intraocular lens implantation system according to the embodiments of this application has at least the following beneficial effects: the mounting slot is used to install the lens scaffold, the push rod assembly is used to push the intraocular lens loaded in the lens scaffold to move along a first direction, the intraocular lens is wound in the guide head, and the guide head can effectively control the winding direction of the intraocular lens, so that the pre-loaded intraocular lens implantation system of this application is more stable and safer, which is beneficial to improving the safety of the operation, avoiding frequent adjustments of the intraocular lens, and improving the efficiency of the operation.

[0022] According to some embodiments of this application, along a first direction, the push rod assembly includes a push rod and a push head. One end of the push rod is provided with a handle, and the other end of the push rod is connected to the push head. The end of the push rod connected to the push head passes through a first through groove, and the side of the push head away from the push rod is provided with a push groove.

[0023] The depth of the injection groove is configured to be no less than the radius of the intraocular lens.

[0024] According to some embodiments of this application, the pre-loaded intraocular lens implantation system further includes a lens scaffold, which is detachably connected to the injection cannula at the location of the mounting slot. The lens scaffold is provided with a third through slot, which communicates with the injection channel. The cross-sectional area of ​​the injection channel near the end of the lens scaffold is larger than the cross-sectional area of ​​the third through slot.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic diagram of the import header structure in an embodiment of this application;

[0028] Figure 2 This is a partial cross-sectional view of the header in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the structure of the imported entity in an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the tablet compression structure according to an embodiment of this application;

[0031] Figure 5 This is a partial cross-sectional view of the pre-loaded intraocular lens implantation system according to an embodiment of this application;

[0032] Figure 6 This is a schematic diagram showing the state of viscoelastic agent being added according to an embodiment of this application;

[0033] Figure 7 This is an exploded view of the pre-loaded intraocular lens implantation system according to an embodiment of this application;

[0034] Figure 8 for Figure 7 A magnified view of a portion of point A in the middle;

[0035] Figure 9 This is a top view of the pre-loaded intraocular lens implantation system according to an embodiment of this application;

[0036] Figure 10 for Figure 9 Sectional view at point AA;

[0037] Figure 11 This is a partial cross-sectional view of the pre-loaded intraocular lens implantation system in a first state according to an embodiment of this application;

[0038] Figure 12 This is a partial cross-sectional view of the pre-loaded intraocular lens implantation system in a second state according to an embodiment of this application;

[0039] Figure 13 This is a partial cross-sectional view of the pre-loaded intraocular lens implantation system in the third state according to an embodiment of this application;

[0040] Figure 14 This is a schematic diagram of the structure of the pre-loaded intraocular lens implantation system according to an embodiment of this application.

[0041] Reference numerals: Inlet head 100, Inlet body 110, Opening groove 111, Injection channel 112, First through section 1121, Second through section 1122, Limiting block 113, Connecting groove 1131, Tableting structure 120, First connecting arm 121, Second connecting arm 122, Tableting body 123, Hollowed-out part 1231, Limiting part 1232, Pushing wall 1233, Clearance space 124;

[0042] The components include: injection sleeve 200, first through groove 210, second through groove 220, mounting groove 230, limiting groove 231, first limiting protrusion 250, and guide part 260.

[0043] Push rod assembly 300, push rod 310, injection head 320, injection groove 321, elastic element 330;

[0044] The lens support 400, the intraocular lens 410, the anterior haptic 411, the posterior haptic 412, the third through groove 420, and the second limiting protrusion 430. Detailed Implementation

[0045] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0046] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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. Therefore, they should not be construed as limitations on this application.

[0047] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0048] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0049] In the description of this application, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The embodiments of this application are described below with reference to the accompanying drawings:

[0051] refer to Figures 1 to 3According to an embodiment of this application, the infusion head 100 includes an infusion body 110 and a compression structure 120. The infusion body 110 is provided with an opening groove 111 and an injection channel 112. The opening groove 111 communicates with the injection channel 112. Along a first direction, at least a section of the cross-sectional area of ​​the injection channel 112 gradually decreases. The channel wall of the injection channel 112 is used to guide the intraocular lens 410 to curl. As the cross-sectional area of ​​the injection channel 112 decreases, the degree of curling of the intraocular lens 410 gradually increases. The compression structure 120 is rotatably connected to the infusion body 110. The compression structure 120 extends into the injection channel 112 through the opening groove 111, such that a portion of the compression structure 120 is located within the injection channel 112. The compression structure 120 is used to abut against the intraocular lens 410 and, together with the channel wall of the injection channel 112, restricts the intraocular lens 410 so that the intraocular lens 410 protrudes toward the side away from the compression structure 120, effectively preventing the intraocular lens 410 from rolling back or flipping within the injection channel 112. Furthermore, the compression structure 120 is also configured to rotate relative to the implantation head 110 under the drive of the intraocular lens 410. Thus, the compression structure 120 abuts against the intraocular lens 410, causing the intraocular lens 410 to curl in a preset direction, ensuring the stability and safety of the intraocular lens 410 implantation process. In the other direction, as the intraocular lens 410 moves along the first direction, the compression structure 120 is also driven by the intraocular lens 410 to rotate relative to the implantation head 100, which is beneficial for adaptively adjusting the pressure between the compression structure 120 and the intraocular lens 410, avoiding excessive compression of the intraocular lens 410 by the compression structure 120, and ensuring the integrity of the intraocular lens 410.

[0052] It should be understood that the cross-sectional area of ​​the injection channel 112 is the area of ​​the cross section formed by the injection channel 112 when it is cut across a plane perpendicular to the first direction.

[0053] Specifically, the intraocular lens 410 enters the injection channel 112 along the first direction. Driven, the intraocular lens 410 moves within the injection channel 112 along the first direction. Along the thickness direction of the intraocular lens 410, the compression structure 120 presses against one side of the intraocular lens 410, while the channel wall of the injection channel 112 supports the opposite side of the intraocular lens 410, causing the intraocular lens 410 to bulge away from the compression structure 120, thereby controlling the retraction direction of the intraocular lens 410. Simultaneously, the compression structure 120 rotates relative to the inlet body 110 driven by the intraocular lens 410, gradually withdrawing from the channel. The compression structure 120 adaptively adjusts the pressure on the intraocular lens 410 as it moves along the first direction. Therefore, while ensuring the direction of the intraocular lens 410's curling, it can also effectively avoid excessive pressure on the intraocular lens 410 until the intraocular lens 410 separates from the compression structure 120, and the intraocular lens 410 is restricted by the channel wall of the injection channel 112 to curl into a cylindrical shape.

[0054] refer to Figures 1 to 5 In some embodiments, the tableting structure 120 includes a tableting body 123, a first connecting arm 121, and a second connecting arm 122. Both the first connecting arm 121 and the second connecting arm 122 are rotatably connected to the inlet body 110, allowing the tableting structure 120 to rotate relative to the inlet body 110. An opening groove 111 extends along a first direction, and the tableting body 123 extends through the opening groove 111 into the injection channel 112. Along a second direction, the first connecting arm 121 is connected to one side of the tableting body 123, and the second connecting arm 122 is connected to the other side of the tableting body 123. The first connecting arm 121, the second connecting arm 122, and the tableting body 123 together define a clearance space 124, which communicates with the opening groove 111. The first direction is perpendicular to the second direction. Therefore, while ensuring the rotatable connection between the compression structure 120 and the infeed body 110, the needle of the viscoelastic injector can extend into the injection channel 112 through the clearance space 124 and the opening groove 111 to inject viscoelastic, thereby lubricating the injection channel 112, making the implantation of the artificial lens 410 smoother, which is beneficial to further protect the artificial lens 410 and avoid damage to the artificial lens 410.

[0055] refer to Figures 1 to 5 In some embodiments, the compression structure 120 includes a hollow portion 1231 located within the injection channel 112. The hollow portion 1231 provides better elasticity to the portion of the compression structure 120 located within the injection channel 112. This allows the compression structure 120 to adapt to elastic deformation when it presses against the intraocular lens 410, effectively avoiding excessive impact on the intraocular lens 410 and better protecting the intraocular lens 410, further preventing damage to the intraocular lens 410.

[0056] Specifically, the tablet compression structure 120 includes a tablet compression body 123, which includes a hollow portion 1231. The tablet compression body 123 extends into the injection channel 112 through an opening groove 111. The hollow portion 1231 is the part of the tablet compression body 123 located within the injection channel 112. The tablet compression body 123 is rotatably connected to the limiting block 113 via a first connecting arm 121 and a second connecting arm 122. When the intraocular lens 410 moves along the injection channel 112, it applies force to the tablet compression body 123, driving the tablet compression body 123 to rotate around the limiting block 113, thereby causing the tablet compression body 123 to gradually exit the injection channel 112. At the same time, the hollow portion 1231 on the tablet compression body 123 gives it a certain degree of elasticity, allowing it to adaptively adjust the pressure on the intraocular lens 410 during rotation, avoiding excessive compression of the intraocular lens 410.

[0057] refer to Figures 1 to 5 In other embodiments, the cutout portion 1231 includes a push wall 1233 for pressing against the intraocular lens 410. The push wall 1233 abuts against the intraocular lens 410 and cooperates with the channel wall of the injection channel 112 to achieve the retraction of the intraocular lens 410. The push wall 1233 can be wavy. For example, the push wall 1233 includes a push groove and two push protrusions. Along the first direction, the push groove is located between the two push protrusions. The wavy push wall 1233 can reduce the contact area with the intraocular lens 410, thereby reducing the risk of scratching the intraocular lens 410. Moreover, during retraction, the area of ​​the push wall 1233 corresponding to the intraocular lens 410 is successively one push protrusion, the push groove, and the other push protrusion. When the intraocular lens 410 passes through the push groove, stress can be released, making it easier to fold the intraocular lens 410 more accurately and effectively.

[0058] It should be noted that the shape of the push wall 1233 is not limited to a wave shape, but can also be an arc shape, a planar shape, etc.

[0059] refer to Figures 1 to 5In some embodiments, along the second direction, the compression structure 120 includes opposing side walls, which are interference-fitted with the groove wall of the opening groove 111. The second direction is perpendicular to the first direction, so that the side walls of the compression structure 120 abut against the groove wall of the opening groove 111, providing more appropriate resistance for the rotation of the compression structure 120 relative to the inlet body 110. On the one hand, this can effectively avoid insufficient pressure of the compression structure 120 on the intraocular lens 410, thereby ensuring the restriction of the bending direction of the intraocular lens 410 by the compression structure 120, and restricting the compression structure 120 outside the injection channel 112 after the compression structure 120 separates from the intraocular lens 410, avoiding interference with the movement of the intraocular lens 410 along the first direction. On the other hand, it can also prevent the compression structure 120 from excessively pressing the intraocular lens 410 and causing damage, ensuring the integrity of the intraocular lens 410 and reducing surgical risks.

[0060] Specifically, in the two opposing side walls of the tablet compression structure 120, there is a margin between the side wall of one side and the groove wall of the abutting opening groove 111. The margin can be from 0.02 mm to 0.1 mm, for example, the margin can be 0.02 mm, 0.04 mm, 0.06 mm, 0.08 mm or 0.1 mm.

[0061] refer to Figures 1 to 5 In some embodiments, the tablet compression structure 120 includes a limiting portion 1232, which abuts against the outer peripheral wall of the inlet body 110 and covers a portion of the opening groove 111. The limiting portion 1232 is used to limit the assembly of the tablet compression structure 120, so as to prevent the tablet compression structure 120 from going too deep into the injection channel 112 and excessively squeezing the artificial lens 410, or to hinder the movement of the artificial lens 410 along the first direction.

[0062] Specifically, the tablet compression structure 120 includes a tablet compression body 123, which includes a limiting part 1232 and a hollow part 1231. The limiting part 1232 is connected to the hollow part 1231. The hollow part 1231 is located inside the injection channel 112, and the limiting part 1232 is located outside the injection channel 112, abutting against the outer peripheral wall of the tablet compression body 123 and covering a part of the opening groove 111. Thus, the hollow part 1231 can have a definite position in the injection channel 112, avoiding excessive compression of the intraocular lens 410 by the hollow part 1231 or even hindering the movement of the intraocular lens 410 in the first direction.

[0063] Along the second direction, the limiting part 1232 includes two opposing side walls with an included angle between them. This included angle can be 2° to 4°. For example, the included angle between the planes containing the opposing side walls of the limiting part 1232 is 2°, 3° or 4°.

[0064] It should be noted that the allowance between the side wall of the tablet compression structure 120 and the groove wall of the opening groove 111 can be understood as the allowance between the side wall of the limiting part 1232 and the groove wall of the corresponding opening groove 111.

[0065] refer to Figures 1 to 6 In some embodiments, the injection channel 112 includes a first section 1121 and a second section 1122. The first section 1121 and the second section 1122 are connected. The first section 1121 and the second section 1122 are arranged sequentially along a first direction. At least one of the first section 1121 and the second section 1122 has a gradually decreasing cross-sectional area along the first direction. The side of the first section 1121 away from the second section 1122 is used to abut against the lens holder 400. The lens holder 400 is used to load the artificial lens 410. The artificial lens 410 can be driven to enter the first section 1121 and the second section 1122 sequentially along the first direction to achieve the retraction of the artificial lens 410.

[0066] For example, the cross-section of the first passage 1121 is elliptical and flat, while the cross-section of the second passage 1122 is circular. Along the first direction, the cross-sectional area of ​​the first passage 1121 gradually decreases, and the cross-sectional area of ​​the first passage 1121 is larger than that of the second passage 1122. That is, the cross-sectional area of ​​the injection channel 112 gradually decreases along the first direction from an elliptical and flat shape at the inlet end to a circular shape at the outlet end. Its minimum cross-sectional area is configured to match the curled-up size of the intraocular lens 410. The gradual decrease in the cross-sectional area of ​​the injection channel 112 can uniformly increase the curled-up degree of the intraocular lens 410, avoid stress concentration, and thus reduce the risk of inversion or overturning.

[0067] Experiments show that the implantation head 100 of this application reduces the incidence of inversion or rotation by 90% during the implantation of the intraocular lens 410, and shortens the average operation time by 15%, significantly improving the stability and safety of the surgery. This implantation system can be used with the packaging frame of the intraocular lens 410 to achieve installation-free injection, significantly improving surgical efficiency and reducing operational risks, and is suitable for the implantation of cataract and refractive intraocular lenses 410.

[0068] Specifically, during retraction, the intraocular lens 410 passes sequentially through the first passage 1121 and the second passage 1122. The compression structure 120 extends into the first passage 1121. Within the first passage 1121, the intraocular lens 410 retracts under the combined pressure of the compression structure 120 and the passage wall of the first passage 1121 to control the retraction direction of the intraocular lens 410. As the intraocular lens 410 approaches the second passage 1122, the degree of retraction of the intraocular lens 410 gradually increases. When the intraocular lens 410 moves to the junction of the first passage 1121 and the second passage 1122, the compression structure 120 separates from the intraocular lens 410. The compression structure 120 is restricted by the groove wall of the opening groove 111 and remains outside the injection channel 112. Within the second segment 1122, the intraocular lens 410 remains in a coiled state until it separates from the implantation body 110, at which point the intraocular lens 410 returns to its original shape, and the complete implantation of the intraocular lens 410 is achieved.

[0069] refer to Figures 1 to 6 In other embodiments, based on the gradual decrease in the cross-sectional area of ​​the first segment 1121, the cross-sectional area of ​​the second segment 1122 gradually decreases along the first direction. As a result, the degree of curling of the intraocular lens 410 gradually increases in both the first segment 1121 and the second segment 1122, which prolongs the curling path of the intraocular lens 410 and makes the curling process of the intraocular lens 410 more stable, which is beneficial to further improve the stability of the intraocular lens 410 during implantation.

[0070] refer to Figures 1 to 6 In some embodiments, the import body 110 is provided with a limiting block 113, and the pressing structure 120 is rotatably connected to the limiting block 113. The limiting block 113 is used to press against the lens holder 400, and the lens holder 400 is used to load the artificial lens 410. Thus, the limiting block 113 has both limiting and connecting functions, making the import head 100 simpler and more compact.

[0071] Specifically, the tablet compression structure 120 includes a first connecting arm 121 and a second connecting arm 122. Along the second direction, the first connecting arm 121 and the second connecting arm 122 are arranged at intervals. Each of the first connecting arm 121 and the second connecting arm 122 has a connecting protrusion on the side facing each other. The inlet body 110 is provided with two limiting blocks 113. Along the second direction, the two limiting blocks 113 are arranged at intervals to avoid the opening groove 111 and ensure that viscoelastic agent is injected into the injection channel 112. Each of the two limiting blocks 113 has a connecting groove 1131 on the side away from each other. The two connecting protrusions are placed in the connecting groove 1131 one by one to realize the rotational connection between the tablet compression structure 120 and the inlet body 110. At the same time, the limiting blocks 113 can also be used to press against the crystal support 400 to realize the limiting of the crystal support 400.

[0072] refer to Figures 1 to 6 In other embodiments, the implantation body 110 includes an inlet end and an outlet end. Along the first direction, the injection channel 112 extends from the inlet end to the outlet end. The outlet end is provided with an inclined surface. The angle between the inclined surface and the first direction is an acute angle. The inclined surface makes the cross-sectional area of ​​the outlet end gradually decrease along the first direction, which increases the sharpness of the outlet end. The outlet end is used to contact the eye tissue, which helps to reduce the contact area between the implantation body 110 and the eye tissue, reduce resistance and damage during the implantation process, and facilitate smoother implantation of the artificial lens 410.

[0073] It should be noted that, along the first direction, the artificial lens 410 enters the injection channel 112 from the inlet end and leaves the injection channel 112 from the outlet end.

[0074] refer to Figures 5 to 7 The pre-installed intraocular lens implantation system according to the embodiments of this application includes an injection cannula 200, a push rod assembly 300, and an insertion head 100 as described in any of the above embodiments. The injection cannula 200 is provided with an installation groove 230, a first through groove 210, and a second through groove 220. Both the first through groove 210 and the second through groove 220 are connected to the installation groove 230. Along a first direction, the first through groove 210, the installation groove 230, and the second through groove 220 are arranged sequentially. Along the first direction, the push rod assembly 300 passes through the first through groove 210 and is movably connected to the injection cannula 200. Along the first direction, the insertion head 100 passes through the second through groove 220, and a portion of the insertion head 100 protrudes from the side of the second through groove 220 away from the installation groove 230. The mounting slot 230 is used to install the lens holder 400, which is used to load the intraocular lens 410. The push rod assembly 300 is used to push the intraocular lens 410 along a first direction, so that the intraocular lens 410 enters the injection channel 112 and curls up. After the intraocular lens 410 is separated from the inlet head 100, it naturally unfolds. The inlet head 100 can make the intraocular lens 410 curl up in a preset direction. Therefore, the pre-loaded intraocular lens implantation system of this application can achieve a more stable and safe implantation operation and effectively reduce the risk of surgery.

[0075] refer to Figures 1 to 5 In other embodiments, the compression structure 120 may be made of elastic materials of different types to accommodate different types of intraocular lenses 410. Furthermore, the pre-loaded intraocular lens implantation system of this application is not only suitable for cataract surgery, but also for intraocular lens 410 implantation in refractive surgery.

[0076] refer to Figures 6 to 8In some other embodiments, the inlet body 110 is provided with a limiting block 113, and the injection sleeve 200 is provided with a first limiting protrusion 250. Along the first direction, the first limiting protrusion 250 is connected to the groove wall of the mounting groove 230, and the first limiting protrusion 250 and the limiting block 113 are arranged in sequence at intervals. The first limiting protrusion 250 and the limiting block 113 are used to abut against the crystal support 400 in a direction perpendicular to the bottom wall of the mounting groove 230, so as to restrict the crystal support 400 from leaving the mounting groove 230 in a direction perpendicular to the bottom wall of the mounting groove 230, so as to facilitate the more stable installation of the crystal support 400.

[0077] Specifically, at least a portion of the first limiting protrusion 250 is located in the mounting groove 230. The first limiting protrusion 250 is used to press against one side of the crystal support 400 and is configured to adapt to the surface shape of the crystal support 400. This ensures a tighter fit between the first limiting protrusion 250 and the crystal support 400, thereby better restricting the movement of the crystal support 400. Similarly, at least a portion of the limiting block 113 extends into the mounting groove 230. The limiting block 113 is used to press against one side of the crystal support 400 and is configured to adapt to the surface shape of the crystal support 400. The limiting block 113 provides an installation position for the pressing structure 120 on the one hand, and limits the crystal support 400 on the other hand.

[0078] It should be noted that there can be multiple limiting blocks 113. Along the second direction, the limiting blocks 113 are arranged at intervals. By using multiple limiting blocks 113 to limit the crystal support 400, it is easier to more stably restrict the movement of the crystal support 400 along the direction perpendicular to the bottom wall of the mounting groove 230, thus providing more reliable positional control of the crystal support 400. Specifically, the first direction, the second direction, and the direction perpendicular to the bottom wall of the mounting groove 230 are all mutually perpendicular.

[0079] In addition, in the mounting groove 230, along the first direction, the opposite sides of the lens holder 400 abut against the groove wall of the mounting groove 230 to limit the position of the lens holder 400; and / or, one side of the lens holder 400 abuts against the groove wall of the mounting groove 230, and the opposite side abuts against the insertion body 110, thereby limiting the insertion body 110 and the lens holder 400, and making the overall structure of the pre-installed intraocular lens more compact.

[0080] refer to Figure 7 and Figure 8In other embodiments, the injection sleeve 200 is further provided with a guide portion 260, which is connected to the bottom wall of the mounting groove 230 and extends to connect with the side wall of the mounting groove 230. As the crystal support 400 is pushed into the mounting groove 230 in the second direction, the crystal support 400 can abut against the guide portion 260, thereby limiting the movement trajectory of the mounting groove 230. This allows the crystal support 400 to move along a preset trajectory, ensuring that the first limiting protrusion 250 and the limiting block 113 work together to fix the crystal support 400, thereby restricting the crystal support 400 from moving in the direction perpendicular to the bottom wall of the mounting groove 230.

[0081] refer to Figure 7 and Figure 8 In some other embodiments, a limiting groove 231 is formed on the bottom wall of the mounting groove 230. The limiting groove 231 is connected to the mounting groove 230 and has a slot facing away from the injection sleeve 200 along the second direction. The limiting groove 231 is used to cooperate with the second limiting protrusion 430 provided by the crystal support 400. When the crystal support 400 is pushed into the mounting groove 230 along the second direction, the second limiting protrusion 430 can be aligned with the slot of the limiting groove 231 and locked into the limiting groove 231 to further ensure the positioning and installation of the crystal support 400.

[0082] It should be understood that the shape and size of the limiting groove 231 match the shape of the crystal support 400.

[0083] refer to Figures 5 to 8 In some embodiments, along a first direction, the push rod assembly 300 includes a push rod 310 and an injection head 320. One end of the push rod 310 is provided with a handle, and the other end of the push rod 310 is connected to the injection head 320. The end of the push rod 310 connected to the injection head 320 passes through a first through groove 210. The side of the injection head 320 away from the push rod 310 is provided with an injection groove 321, wherein the depth of the injection groove 321 is configured to be no less than the radius of the artificial lens 410. The injection head 320 is provided to fix the artificial lens 410, thereby achieving a more stable injection operation.

[0084] Specifically, the injection head 320 can be made of silicone rubber or soft plastic. For example, the injection head 320 can be a silicone pad. The injection head 320 is transversely slit along a section perpendicular to the second direction, and its cross-section can be V-shaped, Y-shaped, or U-shaped. When the injection head 320 abuts against the intraocular lens 410, the intraocular lens 410 is engaged in the injection groove 321. As the push rod 310 pushes, the injection head 320 abuts against the inner wall of the lens support 400, thereby deforming the groove wall of the injection groove 321 towards the intraocular lens 410, achieving stable clamping of the intraocular lens 410. Furthermore, when the intraocular lens 410 enters the injection channel 112, the intraocular lens 410 retracts more stably, making it easier to control the retraction direction of the intraocular lens 410, thus making the intraocular lens implantation surgery safer.

[0085] refer to Figures 5 to 8 In other embodiments, the push rod assembly 300 further includes an elastic element 330, which may be a spring. The push rod 310 passes through the elastic element 330, which provides cushioning when the push rod 310 is pushed, making the injection process smoother and helping to further ensure the curling stability of the intraocular lens 410.

[0086] refer to Figures 5 to 8 In some embodiments, the pre-installed intraocular lens implantation system further includes a lens support 400, which is detachably connected to the injection cannula 200 at the location of the mounting groove 230. The lens support 400 is provided with a third through groove 420, in which the intraocular lens 410 is installed. The third through groove 420 is connected to the injection through groove. The cross-sectional area of ​​the injection through groove near the lens support 400 is larger than the cross-sectional area of ​​the third through groove 420, which facilitates the injection through groove to receive the intraocular lens 410 in the third through groove 420, making the injection process smoother.

[0087] It should be noted that in the pre-installed intraocular lens implantation system of this application, the central axes of the implantation body 110, the compression structure 120, the push rod 310, the injection cannula 200, the injection head 320, the elastic element 330, and the lens scaffold 400 are assembled to coincide with each other.

[0088] refer to Figures 1 to 13 The implantation process of the intraocular lens 410 in this application is further described below:

[0089] The intraocular lens 410 includes an anterior haptic 411 and a posterior haptic 412. The intraocular lens 410 is disposed within a third through-slot 420. A push rod 310 is driven to move the injection head 320 along a first direction. The injection head 320 enters the third through-slot 420 from the first through-slot 210. The posterior haptic 412 of the intraocular lens 410 abuts against the wall of the injection groove 321. The push rod 310 continues to move along the first direction, causing the wall of the injection groove 321 to contact the wall of the third through-slot 420. The injection head 320 deforms, causing the walls of the injection grooves 321 to move closer together, thus clamping and fixing the intraocular lens 410. Under the clamping of the injection head 320, the intraocular lens 410 continues to be pushed into the injection channel 112.

[0090] Within the injection channel 112, along the thickness direction of the intraocular lens 410, the channel wall of the injection channel 112 abuts against one side of the groove wall of the intraocular lens 410, and the tablet pressing structure 120 abuts against the opposite side of the groove wall of the intraocular lens 410. Under the combined action of the tablet pressing structure 120 and the channel wall of the injection channel 112, the intraocular lens 410 bulges towards the side away from the tablet pressing structure 120 (while the injection head 320 remains fixed to the intraocular lens 410), causing the intraocular lens 410 to retract in a predetermined direction. When the intraocular lens 410 is driven to move to the exit end near the injection channel 112, the tablet pressing structure 120 separates from the intraocular lens 410 and exits the injection channel 112. As the cross-sectional area of ​​the injection channel 112 gradually decreases, the intraocular lens 410 gradually shrinks into a cylindrical shape. When the intraocular lens 410 is pushed out of the injection channel 112, it naturally unfolds back to its original shape, thus realizing the implantation of the intraocular lens 410.

[0091] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.

Claims

1. An import head, characterized in that, include: The inlet body is provided with an opening groove and a push channel. The opening groove is connected to the push channel. Along the first direction, at least one section of the push channel has a gradually decreasing cross-sectional area. The tablet compression structure includes a tablet compression body, a first connecting arm, and a second connecting arm. Both the first connecting arm and the second connecting arm are rotatably connected to the inlet body. The tablet compression structure also includes a hollow portion located within the injection channel. The tablet compression structure extends into the injection channel through the opening groove. The hollow portion on the tablet compression body gives it a certain degree of elasticity. The tablet compression structure is used to abut against the intraocular lens so that the intraocular lens protrudes towards the side away from the tablet compression structure. The compression structure is configured to rotate relative to the implantation body under the drive of the intraocular lens.

2. The inlet head according to claim 1, characterized in that, The opening groove extends along the first direction, and the tablet body extends into the injection channel through the opening groove. Along the second direction, the first connecting arm is connected to one side of the tablet body, and the second connecting arm is connected to the other side of the tablet body. The first connecting arm, the second connecting arm, and the tablet body together define an avoidance space. The avoidance space communicates with the opening groove, and the first direction is perpendicular to the second direction.

3. The inlet head according to claim 1, characterized in that, Along the second direction, the opposite side walls of the tablet compression structure are interference-fitted with the groove wall of the opening groove, and the second direction is perpendicular to the first direction.

4. The inlet head according to claim 1, characterized in that, The tablet compression structure includes a limiting part that abuts against the outer peripheral wall of the inlet body and covers a portion of the opening groove.

5. The inlet head according to claim 1, characterized in that, The injection channel includes a first section and a second section, the first section and the second section are connected, and along the first direction, at least one of the first section and the second section has a gradually decreasing cross-sectional area. The side of the first section away from the second section is used to abut against the crystal support.

6. The inlet head according to claim 1, characterized in that, The inlet body is provided with a limiting block, and the pressing structure is rotatably connected to the limiting block. The limiting block is used to press against the crystal support.

7. A pre-loaded intraocular lens implantation system, characterized in that, include: The injection sleeve is provided with an installation groove, a first through groove and a second through groove. The first through groove and the second through groove are both connected to the installation groove. Along the first direction, the first through groove, the installation groove and the second through groove are arranged in sequence. A push rod assembly, along the first direction, is inserted into the first through groove, and the push rod assembly is movably connected to the injection sleeve; The inlet head according to any one of claims 1 to 6, wherein along the first direction, the inlet head passes through the second through groove, and a portion of the inlet head extends out of the second through groove to the side opposite to the mounting groove.

8. The pre-loaded intraocular lens implantation system according to claim 7, characterized in that, Along the first direction, the push rod assembly includes a push rod and a push head. One end of the push rod is provided with a handle, and the other end of the push rod is connected to the push head. The end of the push rod connected to the push head passes through the first through groove, and the side of the push head away from the push rod is provided with a push groove. The depth of the injection groove is configured to be no less than the radius of the intraocular lens.

9. The pre-loaded intraocular lens implantation system according to claim 7, characterized in that, The pre-installed intraocular lens implantation system also includes a lens support, which is detachably connected to the injection cannula at the location of the mounting slot. The lens support is provided with a third through slot, which communicates with the injection channel. The cross-sectional area of ​​the injection channel near the end of the lens support is larger than the cross-sectional area of ​​the third through slot.

Images