Leading-in head and preassembled intraocular lens implantation system

Abstract

The invention provides a leading-in head and a preassembled intraocular lens implantation system, the leading-in head comprises a leading-in main body and a pressing sheet structure, the leading-in main body is provided with an opening groove and a push injection channel, the opening groove is communicated with the push injection channel, the cross section area of at least one section of the push injection channel is gradually reduced along a first direction, the pressing sheet structure is rotatably connected with the leading-in main body, and the pressing sheet structure is connected with the leading-in main body. The tablet pressing structure extends into the injection channel through the opening groove and is used for abutting against the intraocular lens, so that the intraocular lens protrudes towards the side away from the tablet pressing structure; the tablet pressing structure is configured to be driven by the intraocular lens to rotate relative to the leading-in body. The preassembled intraocular lens implanting system comprises an injection sleeve, an injection assembly and the leading-in head, the leading-in head is connected with the injection sleeve, the injection assembly is movably connected with the injection sleeve, and the leading-in head and the preassembled intraocular lens implanting system can improve stability and safety in the intraocular lens implanting process.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to an introduction head and a pre-installed intraocular lens implantation system. Background Art

[0002] An intraocular lens (IOL) is a special lens made of artificial synthetic materials that is implanted into the eye to replace the patient's natural lens, which has become cloudy due to disease, thereby restoring the patient's vision. Currently, IOL implants are usually guided by an inserter. During the implantation process, the IOL curls up under the guidance of the inserter and unfolds when it leaves the inserter, allowing for smooth implantation into the eye. However, the problem is that current inserters often lack effective restraining structures, making it difficult to effectively control the curling direction of the IOL within the inserter. This makes it prone to local stress concentration within the inserter, and further, the IOL is prone to the risk of curling or flipping during implantation, making it difficult to ensure the stability and safety of the IOL during implantation. Summary of the Invention

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

[0004] The present application also proposes a pre-installed intraocular lens implantation system having the above-mentioned introduction head.

[0005] The introduction head according to the embodiment of the present application includes an introduction body and a tablet pressing structure; The inlet body is provided with an opening groove and a push injection channel, the opening groove is connected to the push injection channel, and the cross-sectional area of ​​at least one section of the push injection channel gradually decreases along a first direction; A tablet pressing structure is rotatably connected to the introduction body, the tablet pressing structure extends into the injection channel through the opening slot, and the tablet pressing structure is used to abut against the intraocular lens so that the intraocular lens bulges toward a side away from the tablet pressing structure; The pressing structure is configured to be driven by the intraocular lens to rotate relative to the introduction body.

[0006] The introduction head according to the embodiment of the present application has at least the following beneficial effects: the channel wall of the injection channel is used to guide the curling of the intraocular lens, and as the cross-sectional area of ​​the injection channel decreases, the curling degree of the intraocular lens gradually increases. The pressing structure is used to abut against the intraocular lens, and cooperates with the channel wall of the injection channel to restrict the intraocular lens, so that the intraocular lens bulges toward the side away from the pressing structure, effectively preventing the intraocular lens from curling back or flipping in the injection channel. In addition, the pressing structure is also configured to be driven by the intraocular lens and rotate relative to the introduction body, so that the pressing structure abuts against the intraocular lens on the one hand, causing the intraocular lens to curl in a preset direction. Therefore, the introduction head in the present application can improve the stability and safety of intraocular lens implantation.

[0007] According to some embodiments of the present application, the tablet pressing structure includes a tablet pressing body, a first connecting arm and a second connecting arm, wherein the first connecting arm and the second connecting arm are both rotatably connected to the introduction body; Among them, the opening groove is extended along the first direction, and the tablet pressing 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 pressing body, and the second connecting arm is connected to the other side of the tablet pressing body. The first connecting arm, the second connecting arm and the tablet pressing body jointly define an avoidance space, and the avoidance space is connected to the opening groove. The first direction is perpendicular to the second direction.

[0008] According to some embodiments of the present application, the tablet pressing structure includes a hollow portion, which is located in the injection channel.

[0009] According to some embodiments of the present application, along the second direction, the two opposite side walls of the pressing structure are interference fit with the groove wall of the opening groove, and the second direction is perpendicular to the first direction.

[0010] According to some embodiments of the present application, the pressing structure includes a limiting portion, the limiting portion abuts against the outer peripheral wall of the introduction body, and the limiting portion covers a portion of the opening groove.

[0011] According to some embodiments of the present application, the push injection channel includes a first section and a second section, the first section is connected to the second section, and along the first direction, at least one cross-sectional area of ​​the first section and the second section gradually decreases, and the side of the first section away from the second section is used to abut the crystal bracket.

[0012] According to some embodiments of the present application, the introduction body is provided with a limit block, the pressing structure is rotatably connected to the limit block, and the limit block is used to press the crystal bracket.

[0013] The pre-installed intraocular lens implantation system according to an embodiment of the present application comprises an injection cannula, a push rod assembly, and the introduction head of any of the above embodiments; The push-injection sleeve is provided with a mounting groove, a first through groove and a second through groove, wherein the first through groove and the second through groove are both connected to the mounting groove, and the first through groove, the mounting groove and the second through groove are arranged in sequence along the first direction; A push rod assembly is inserted into the first through slot along a first direction, and the push rod assembly is movably connected to the injection sleeve; Along the first direction, the introduction head is arranged in the second through slot, and a part of the introduction head passes through the second through slot away from the side of the installation slot.

[0014] The pre-installed intraocular lens implantation system according to the embodiment of the present application has at least the following beneficial effects: the mounting groove is used to install the crystal holder, the push rod assembly is used to push the intraocular lens loaded in the crystal holder to move along a first direction, the intraocular lens is wound in the introduction head, and the introduction head can effectively control the curling direction of the intraocular lens, so that the pre-installed intraocular lens implantation system of the present application is more stable and safe, which is beneficial to improving the safety of the operation, avoiding frequent adjustments of the intraocular lens, and improving the efficiency of the operation.

[0015] According to some embodiments of the present application, along a first direction, the push rod assembly includes a push rod and an injection head, one end of the push rod is provided with a handle, the other end of the push rod is connected to the injection head, the end of the push rod connected to the injection head penetrates into the first through groove, and the injection head is provided with an injection groove on a side away from the push rod; The depth of the injection groove is configured to be no less than the radius of the intraocular lens.

[0016] According to some embodiments of the present application, the preinstalled intraocular lens implantation system also includes a lens holder, which is detachably connected to the push injection sleeve at the installation groove. The crystal holder is provided with a third through groove, which is connected to the push injection channel. The cross-sectional area of ​​the push injection channel near one end of the crystal holder is larger than the cross-sectional area of ​​the third through groove.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic structural diagram of the introduction head of an embodiment of the present application; Figure 2 A partial cross-sectional view of the introduction head according to an embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the main body of the embodiment of the present application; Figure 4 This is a schematic diagram of the tableting structure of an embodiment of the present application; Figure 5A partial cross-sectional view of a pre-installed intraocular lens implant system according to an embodiment of the present application; Figure 6 This is a schematic diagram of the state of adding viscoelastic agent in the embodiment of the present application; Figure 7 This is an exploded view of the pre-installed intraocular lens implant system according to an embodiment of the present application; Figure 8 for Figure 7 A partial enlarged schematic diagram of point A in the middle; Figure 9 A top view of a pre-installed intraocular lens implant system according to an embodiment of the present application; Figure 10 for Figure 9 Cross-sectional view at AA in the middle; Figure 11 A partial cross-sectional view of the pre-installed intraocular lens implant system in a first state according to an embodiment of the present application; Figure 12 A partial cross-sectional view of the pre-installed intraocular lens implant system in the second state according to an embodiment of the present application; Figure 13 A partial cross-sectional view of the pre-installed intraocular lens implant system in the third state according to an embodiment of the present application; Figure 14 This is a schematic structural diagram of the intraocular lens introduced in the pre-installed intraocular lens implantation system according to an embodiment of the present application.

[0019] Reference numerals: introduction head 100, introduction body 110, opening groove 111, injection channel 112, first through section 1121, second through section 1122, limiting block 113, connecting groove 1131, tablet pressing structure 120, first connecting arm 121, second connecting arm 122, tablet pressing body 123, hollow portion 1231, limiting portion 1232, pushing wall 1233, avoidance space 124; The push-injection sleeve 200, the first through groove 210, the second through groove 220, the mounting groove 230, the limiting groove 231, the first limiting protrusion 250, and the guide portion 260; Push rod assembly 300, push rod 310, injection head 320, injection slot 321, elastic member 330; Crystal support 400 , intraocular lens 410 , anterior haptic 411 , posterior haptic 412 , third through slot 420 , and second limiting protrusion 430 . DETAILED DESCRIPTION

[0020] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0021] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0022] In the description of this application, "several" means more than one, "plurality" means two or more, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0023] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0024] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0025] The following describes the embodiments of the present application in conjunction with the accompanying drawings: refer to Figures 1 to 3According to an embodiment of the present application, the inserter head 100 includes an inserter body 110 and a pressing structure 120. The inserter body 110 is provided with an opening slot 111 and an injection channel 112. The opening slot 111 communicates with the injection channel 112. Along a first direction, the cross-sectional area of ​​at least one section of the injection channel 112 gradually decreases. The channel wall of the injection channel 112 is used to guide the curling of the intraocular lens 410. As the cross-sectional area of ​​the injection channel 112 decreases, the degree of curling of the intraocular lens 410 gradually increases. The pressing structure 120 is rotatably connected to the inserter body 110 and extends into the injection channel 112 through the opening slot 111, so that a portion of the pressing structure 120 is located within the injection channel 112. The pressing structure 120 is used to abut against the intraocular lens 410 and cooperate with the channel wall of the injection channel 112 to restrict the intraocular lens 410 so that the intraocular lens 410 bulges toward the side away from the pressing structure 120, effectively preventing the intraocular lens 410 from curling or flipping in the injection channel 112. In addition, the pressing structure 120 is also configured to be driven by the artificial lens 410 to rotate relative to the introduction body 110, so that, on the one hand, the pressing structure 120 is offset from the artificial lens 410, so that the artificial lens 410 is curled in a preset direction, ensuring the stability and safety of the artificial lens 410 implantation process. On the other hand, as the artificial lens 410 moves along the first direction, the pressing structure 120 is also driven by the artificial lens 410 to rotate relative to the introduction head 100, which is beneficial to adaptively adjust the pressure between the pressing structure 120 and the artificial lens 410, avoid excessive compression of the artificial lens 410 by the pressing structure 120, and help ensure the integrity of the artificial lens 410.

[0026] It should be understood that the cross-sectional area of ​​the bolus channel 112 is the area of ​​a cross section produced by cutting the bolus channel 112 along a plane perpendicular to the first direction.

[0027] Specifically, the intraocular lens 410 enters the injection channel 112 along a first direction and is driven to move within the injection channel 112 along the first direction. Along the thickness direction of the intraocular lens 410, the pressing structure 120 presses against one side of the intraocular lens 410. The channel wall of the injection channel 112 supports the opposite side of the intraocular lens 410, causing the intraocular lens 410 to bulge toward the side away from the pressing structure 120, thereby controlling the retraction direction of the intraocular lens 410. Simultaneously, the pressing structure 120, driven by the intraocular lens 410, rotates relative to the introduction body 110, gradually withdrawing from the channel. The pressing structure 120 adaptively adjusts the pressure on the intraocular lens 410 as the intraocular lens 410 moves along the first direction. Therefore, on the basis of ensuring the curling direction of the intraocular lens 410, excessive pressure on the intraocular lens 410 can be effectively avoided until the intraocular lens 410 is separated from the pressing structure 120, and the intraocular lens 410 is restricted by the channel wall of the injection channel 112 to curl into a cylindrical shape.

[0028] refer to Figures 1 to 5 In some embodiments, the tablet pressing structure 120 includes a tablet pressing body 123, a first connecting arm 121, and a second connecting arm 122. The first connecting arm 121 and the second connecting arm 122 are both rotatably connected to the introduction body 110, so that the tablet pressing structure 120 can rotate relative to the introduction body 110. The opening slot 111 extends along a first direction, and the tablet pressing body 123 extends into the injection channel 112 through the opening slot 111. Along the second direction, the first connecting arm 121 is connected to one side of the tablet pressing body 123, and the second connecting arm 122 is connected to the other side of the tablet pressing body 123. The first connecting arm 121, the second connecting arm 122, and the tablet pressing body 123 jointly define an escape space 124. The escape space 124 is connected to the opening slot 111, and the first direction is perpendicular to the second direction. Therefore, on the basis of ensuring the rotational connection between the pressing structure 120 and the introduction body 110, the needle of the viscoelastic agent syringe can extend into the injection channel 112 through the avoidance space 124 and the opening groove 111 to inject the viscoelastic agent, 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 prevent the artificial lens 410 from being damaged.

[0029] refer to Figures 1 to 5 In some embodiments, the pressing structure 120 includes a hollow portion 1231, which is located in the injection channel 112. The hollow setting allows the portion of the pressing structure 120 located in the injection channel 112 to have better elasticity, so that when the pressing structure 120 presses against the artificial lens 410, the pressing structure 120 can adaptively produce elastic deformation, effectively avoiding excessive impact on the artificial lens 410, which is beneficial to better protect the artificial lens 410 and further avoid damage to the artificial lens 410.

[0030] Specifically, the tablet structure 120 includes a tablet body 123, which includes a hollow portion 1231. The tablet body 123 extends into the injection channel 112 through the opening slot 111. The hollow portion 1231 is the portion of the tablet body 123 located within the injection channel 112. The tablet body 123 is rotatably connected to the limit block 113 via the first connecting arm 121 and the second connecting arm 122. When the intraocular lens 410 moves along the injection channel 112, it applies force to the tablet body 123, driving the tablet body 123 to rotate around the limit block 113, thereby gradually withdrawing the tablet body 123 from the injection channel 112. Furthermore, the hollow portion 1231 on the tablet body 123 provides a certain degree of elasticity, enabling it to adaptively adjust the pressure on the intraocular lens 410 during rotation to avoid excessive compression of the intraocular lens 410.

[0031] refer to Figures 1 to 5 In other embodiments, the hollow portion 1231 includes a push wall 1233 for pressing against the intraocular lens 410. The push wall 1233 is configured to abut against the intraocular lens 410 and cooperate with the channel wall of the injection channel 112 to achieve the retraction of the intraocular lens 410. The push wall 1233 may 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. Furthermore, during retraction, the area of ​​the push wall 1233 corresponding to the intraocular lens 410 is sequentially formed by one of the push protrusions, the push groove, and the other push protrusion. When the intraocular lens 410 passes through the push groove, stress is released, facilitating more precise and effective folding of the intraocular lens 410.

[0032] It should be noted that the shape of the push wall 1233 is not limited to a wave shape, and may also be an arc shape, a plane shape, or the like.

[0033] refer to Figures 1 to 5In some embodiments, along the second direction, the pressing structure 120 includes two opposite side walls, and the two opposite side walls of the pressing structure 120 are interference fit with the groove walls of the opening groove 111. The second direction is perpendicular to the first direction, so that the side walls of the pressing structure 120 abut against the groove walls of the opening groove 111, which is used to provide a more moderate resistance for the rotation of the pressing structure 120 relative to the introduction body 110. On the one hand, it can effectively avoid insufficient pressure of the pressing structure 120 on the artificial lens 410, thereby ensuring that the pressing structure 120 restricts the bending direction of the artificial lens 410, and after the pressing structure 120 is separated from the artificial lens 410, the pressing structure 120 is restricted outside the injection channel 112 to avoid interfering with the driving of the artificial lens 410 to move along the first direction. On the other hand, it can also avoid excessive pressure of the pressing structure 120 on the artificial lens 410 to cause damage, thereby ensuring the integrity of the artificial lens 410 and reducing surgical risks.

[0034] Specifically, in the two opposite side walls of the pressing structure 120, there is a surplus between the side wall on either side and the groove wall of the opposing opening groove 111, and the surplus can be 0.02mm to 0.1mm, for example, the surplus can be 0.02mm, 0.04mm, 0.06mm, 0.08mm or 0.1mm.

[0035] refer to Figures 1 to 5 In some embodiments, the pressing structure 120 includes a limiting portion 1232, which abuts against the outer wall of the introduction body 110 and covers a portion of the opening groove 111. The limiting portion 1232 is used to achieve assembly limitation of the pressing structure 120 to prevent the pressing structure 120 from excessively penetrating into the injection channel 112 and excessively squeezing the artificial lens 410, or hindering the movement of the artificial lens 410 along the first direction.

[0036] Specifically, the tablet structure 120 includes a tablet body 123, and the tablet body 123 includes a limiting portion 1232 and a hollow portion 1231. The limiting portion 1232 is connected to the hollow portion 1231, and the hollow portion 1231 is located in the injection channel 112. The limiting portion 1232 is located outside the injection channel 112 and abuts against the outer peripheral wall of the tablet body 123, and covers a part of the opening groove 111, so that the hollow portion 1231 can have a determined position in the injection channel 112, thereby preventing the hollow portion 1231 from excessively squeezing the artificial lens 410 or even hindering the movement of the artificial lens 410 along the first direction.

[0037] In which, along the second direction, the limiting portion 1232 includes two opposite side walls, and there is an angle between the two side walls, which can be 2° to 4°. For example, the angle between the planes where the two opposite side walls of the limiting portion 1232 are located is 2°, 3° or 4°.

[0038] It should be noted that the margin between the side wall of the pressing structure 120 and the groove wall of the opening groove 111 can be understood as the margin between the side wall of the limiting portion 1232 and the corresponding groove wall of the opening groove 111 .

[0039] refer to Figures 1 to 6 In some embodiments, the injection channel 112 includes a first through section 1121 and a second through section 1122. The first through section 1121 is connected to the second through section 1122. Along the first direction, the first through section 1121 and the second through section 1122 are arranged in sequence, and at least one cross-sectional area of ​​the first through section 1121 and the second through section 1122 gradually decreases along the first direction. The side of the first through section 1121 away from the second through section 1122 is used to abut the crystal bracket 400. The crystal bracket 400 is used to load the artificial lens 410. The artificial lens 410 can be driven to enter the first through section 1121 and the second through section 1122 in sequence along the first direction to achieve the curling of the artificial lens 410.

[0040] For example, the cross-section of the first through section 1121 is elliptical and flat, while the cross-section of the second through section 1122 is circular. Along a first direction, the cross-sectional area of ​​the first through section 1121 gradually decreases, and the cross-sectional area of ​​the first through section 1121 is larger than the cross-sectional area of ​​the second through section 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, with its minimum cross-sectional area configured to match the curled size of the intraocular lens 410. The gradual reduction in the cross-sectional area of ​​the injection channel 112 can evenly increase the degree of curling of the intraocular lens 410, avoid stress concentration, and thus reduce the risk of recurling or flipping.

[0041] Experiments have shown that the implant insert 100 of the present application reduces the incidence of retraction or flipping during intraocular lens 410 implantation by 90%, and shortens surgical time by an average of 15%, significantly improving surgical stability and safety. This implantation system can be used in conjunction with the intraocular lens 410 packaging holder to achieve installation-free push injection, significantly improving surgical efficiency and reducing operational risks. It is suitable for the implantation of cataract and refractive intraocular lenses 410.

[0042] Specifically, during curling, the intraocular lens 410 sequentially passes through the first through section 1121 and the second through section 1122. The pressing structure 120 extends into the first through section 1121. Within the first through section 1121, the intraocular lens 410 curls under the joint support of the pressing structure 120 and the through-section wall of the first through section 1121, thereby controlling the curling direction of the intraocular lens 410. As the intraocular lens 410 approaches the second through section 1122, the degree of curling of the intraocular lens 410 gradually increases. When the intraocular lens 410 moves to the connection point between the first through section 1121 and the second through section 1122, the pressing structure 120 separates from the intraocular lens 410 and is restrained by the groove wall of the opening groove 111, remaining outside the injection channel 112. In the second through section 1122 , the intraocular lens 410 remains in a curled state until the intraocular lens 410 is separated from the introduction body 110 , and the intraocular lens 410 returns to its original shape, completing the implantation of the intraocular lens 410 .

[0043] refer to Figures 1 to 6 In other embodiments, on the basis of the gradual decrease in the cross-sectional area of ​​the first through section 1121, the cross-sectional area of ​​the second through section 1122 gradually decreases along the first direction, so that the curling degree of the artificial lens 410 gradually increases in both the first through section 1121 and the second through section 1122, thereby extending the curling path of the artificial lens 410, making the curling process of the artificial lens 410 smoother, which is beneficial to further improve the stability of the artificial lens 410 during implantation.

[0044] refer to Figures 1 to 6 In some embodiments, the introduction body 110 is provided with a limit block 113, and the pressing structure 120 is rotatably connected to the limit block 113. The limit block 113 is used to press the crystal bracket 400, and the crystal bracket 400 is used to load the artificial lens 410. Therefore, the limit block 113 has both limiting and connecting functions, making the introduction head 100 simpler and more compact.

[0045] Specifically, the tablet pressing 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. The first connecting arm 121 and the second connecting arm 122 are provided with connecting protrusions on the side facing each other. The introduction body 110 is provided with two limit blocks 113. Along the second direction, the two limit blocks 113 are arranged at intervals to avoid the opening groove 111 and ensure that the viscoelastic agent is injected into the injection channel 112. The two limit blocks 113 are provided with connecting grooves 1131 on the side away from each other. The two connecting protrusions are placed in the connecting grooves 1131 one by one to realize the rotational connection between the tablet pressing structure 120 and the introduction body 110. At the same time, the limit blocks 113 can also be used to press the crystal bracket 400 to realize the limitation of the crystal bracket 400.

[0046] refer to Figures 1 to 6 In other embodiments, the introduction 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 setting of the inclined surface makes the cross-sectional area of ​​the outlet end gradually decrease along the first direction, thereby increasing the sharpness of the outlet end. The outlet end is used to contact the eye tissue, thereby helping to reduce the contact area between the introduction body 110 and the eye tissue, reduce the resistance and damage during the implantation process, and facilitate smoother implantation of the artificial lens 410.

[0047] It should be noted that, along the first direction, the intraocular lens 410 enters the injection channel 112 from the inlet end and leaves the injection channel 112 from the outlet end.

[0048] refer to Figures 5 to 7 According to an embodiment of the present application, the pre-installed intraocular lens implantation system includes a push-in cannula 200, a push rod assembly 300, and the introduction head 100 of any of the above embodiments. The push-in cannula 200 is provided with a mounting groove 230, a first through groove 210, and a second through groove 220. The first through groove 210 and the second through groove 220 are both connected to the mounting groove 230. Along a first direction, the first through groove 210, the mounting groove 230, and the second through groove 220 are arranged in sequence. Along the first direction, the push rod assembly 300 is provided in the first through groove 210. The push rod assembly 300 is movably connected to the push-in cannula 200. Along the first direction, the introduction head 100 is provided in the second through groove 220, and a portion of the introduction head 100 passes through the second through groove 220 and is away from the side of the mounting groove 230. The mounting groove 230 is used to install the crystal bracket 400, and the crystal bracket 400 is used to load the artificial lens 410. The push rod assembly 300 is used to push the artificial lens 410 to move along the first direction, so that the artificial lens 410 enters the injection channel 112 and curls up. The artificial lens 410 naturally unfolds after being separated from the introduction head 100. The introduction head 100 can enable the artificial lens 410 to curl up in a preset direction. Therefore, the preinstalled artificial lens implantation system in this application can achieve a more stable and safe implantation operation, effectively reducing the risk of the operation.

[0049] refer to Figures 1 to 5 In other embodiments, the pressing structure 120 can be made of elastic materials of different materials to accommodate different types of intraocular lenses 410. In addition, the pre-assembled intraocular lens implantation system of the present application is not only applicable to cataract surgery, but also to the implantation of intraocular lenses 410 in refractive surgery.

[0050] refer to Figures 6 to 8In other embodiments, the introduction body 110 is provided with a limit block 113, and the injection sleeve 200 is provided with a first limit protrusion 250. Along the first direction, the first limit protrusion 250 is connected to the groove wall of the mounting groove 230, and the first limit protrusion 250 and the limit block 113 are arranged in sequence. The first limit protrusion 250 and the limit block 113 are used to offset the crystal bracket 400 along the direction perpendicular to the bottom wall of the mounting groove 230 to limit the crystal bracket 400 from leaving the mounting groove 230 along the direction perpendicular to the bottom wall of the mounting groove 230, so as to facilitate more stable installation of the crystal bracket 400.

[0051] Specifically, at least a portion of the first limiting protrusion 250 is located in the mounting groove 230, and the first limiting protrusion 250 is used to press against one side of the crystal bracket 400, and is configured to adapt to the surface shape setting of the crystal bracket 400, which can ensure that the first limiting protrusion 250 and the crystal bracket 400 fit more closely, thereby better limiting the movement of the crystal bracket 400. Similarly, at least a portion of the limiting block 113 extends into the mounting groove 230, and the limiting block 113 is used to press against one side of the crystal bracket 400, and is configured to adapt to the surface shape setting of the crystal bracket 400. On the one hand, the limiting block 113 provides an installation position for the pressing structure 120, and on the other hand, it limits the crystal bracket 400.

[0052] It should be noted that there can be multiple limit blocks 113, and each limit block 113 is arranged at intervals along the second direction. The crystal holder 400 is limited by multiple limit blocks 113, which facilitates more stable restriction of the movement of the crystal holder 400 in a direction perpendicular to the bottom wall of the mounting groove 230, and more reliable position determination of the crystal holder 400. Among them, the first direction, the second direction, and the direction perpendicular to the bottom wall of the mounting groove 230 are perpendicular to each other.

[0053] In addition, in the mounting groove 230, along the first direction, the two opposite sides of the crystal bracket 400 are against the groove wall of the mounting groove 230 to limit the position of the crystal bracket 400; and / or, one side of the crystal bracket 400 is against the groove wall of the mounting groove 230, and the other opposite side is against the introduction body 110, thereby achieving the limitation of the introduction body 110 and the crystal bracket 400, and the overall structure of the pre-installed intraocular lens is more compact.

[0054] refer to Figure 7 and Figure 8In other embodiments, the push 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 be connected to the side wall of the mounting groove 230. As the crystal bracket 400 is pushed into the mounting groove 230 along the second direction, the crystal bracket 400 can be offset against the guide portion 260, thereby limiting the movement trajectory of the mounting groove 230, so that the crystal bracket 400 can move along the preset trajectory to ensure that the first limiting protrusion 250 and the limiting block 113 cooperate to fix the crystal bracket 400, thereby limiting the movement of the crystal bracket 400 along the direction perpendicular to the bottom wall of the mounting groove 230.

[0055] refer to Figure 7 and Figure 8 In other embodiments, a limiting groove 231 is provided on the bottom wall of the mounting groove 230, and the limiting groove 231 is connected to the mounting groove 230, and along the second direction, the limiting groove 231 has a notch facing away from the injection sleeve 200, and the limiting groove 231 is used to cooperate with the second limiting protrusion 430 provided on the crystal bracket 400. When the crystal bracket 400 is pushed into the mounting groove 230 along the second direction, the second limiting protrusion 430 can be aligned with the notch of the limiting groove 231 and snapped into the limiting groove 231 to further ensure the positioning and installation of the crystal bracket 400.

[0056] It should be understood that the shape and size of the limiting groove 231 match the shape of the crystal bracket 400 .

[0057] refer to Figures 5 to 8 In some embodiments, along the first direction, the push rod assembly 300 includes a push rod 310 and an injection head 320, a handle is provided at one end of the push rod 310, and the other end of the push rod 310 is connected to the injection head 320, and the end of the push rod 310 connected to the injection head 320 passes through the first through groove 210, and an injection groove 321 is provided on the side of the injection head 320 away from the push rod 310, wherein the depth of the injection groove 321 is configured to be not less than the radius of the artificial lens 410, and the setting of the injection head 320 is used to fix the artificial lens 410, thereby achieving a more stable injection operation.

[0058] 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. When the injection head 320 is cut along a section perpendicular to the second direction, the cross-section of the injection head 320 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 inserted into the injection groove 321. As the push rod 310 pushes, the injection head 320 abuts the inner wall of the lens holder 400, thereby deforming the groove wall of the injection groove 321 toward the intraocular lens 410, thereby 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, and making the intraocular lens 410 implantation surgery safer.

[0059] refer to Figures 5 to 8 In other embodiments, the push rod assembly 300 also includes an elastic member 330, which can be a spring. The push rod 310 penetrates the elastic member 330, and the elastic member 330 is used to provide a buffer when pushing the push rod 310, so that the injection process is smoother, which is beneficial to further ensure the curling stability of the artificial lens 410.

[0060] refer to Figures 5 to 8 In some embodiments, the preinstalled intraocular lens implantation system further includes a crystal holder 400, which is detachably connected to the push-injection sleeve 200 at the location of the mounting groove 230. The crystal holder 400 is provided with a third through groove 420, in which the intraocular lens 410 is mounted. The third through groove 420 is connected to the push-injection groove, and the cross-sectional area of ​​the push-injection groove near one end of the crystal holder 400 is larger than the cross-sectional area of ​​the third through groove 420, so that the push-injection groove can receive the intraocular lens 410 in the third through groove 420, thereby making the push-injection process smoother.

[0061] It should be noted that in the preassembled intraocular lens implantation system of the present application, the central axes of the introduction body 110, the pressing structure 120, the push rod 310, the injection sleeve 200, the injection head 320, the elastic member 330 and the crystal bracket 400 are assembled to coincide with each other.

[0062] refer to Figures 1 to 13 The following further describes the implantation process of the intraocular lens 410 in this application: The intraocular lens 410 includes an anterior haptic 411 and a posterior haptic 412. The intraocular lens 410 is positioned within the third through-slot 420. The push rod 310 is driven to move the injection head 320 in the 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 the wall of the injection slot 321. The push rod 310 continues to be driven in the first direction. The wall of the injection slot 321 contacts the wall of the third through-slot 420. The injection head 320 deforms, bringing the walls of the injection slot 321 closer together, thereby clamping and securing the intraocular lens 410. Clamped by the injection head 320, the intraocular lens 410 continues to be pushed into the injection channel 112.

[0063] In the injection channel 112, along the thickness direction of the artificial lens 410, the channel wall of the injection channel 112 abuts against the groove wall on one side of the artificial lens 410, and the pressing structure 120 abuts against the groove wall on the other side opposite to the artificial lens 410. Under the joint action of the pressing structure 120 and the channel wall of the injection channel 112, the artificial lens 410 bulges toward the side away from the pressing structure 120 (at the same time, the injection head 320 keeps the artificial lens 410 fixed), so that the artificial lens 410 curls in a predetermined direction. When the artificial lens 410 is driven to move to the outlet end near the injection channel 112, the pressing structure 120 separates from the artificial 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 curls up into a cylindrical shape. After the intraocular lens 410 is pushed out of the injection channel 112, it naturally unfolds into its original shape, thereby achieving the implantation of the intraocular lens 410.

[0064] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features of the embodiments can be combined with each other unless there is a conflict.

Claims

1. An introduction head, characterized in that: include: An inlet body is provided with an opening groove and a push injection channel, wherein the opening groove is in communication with the push injection channel, and a cross-sectional area of ​​at least one section of the push injection channel gradually decreases along a first direction; a pressing structure, rotatably connected to the introduction body, the pressing structure extending into the injection channel through the opening groove, the pressing structure being used to abut against the intraocular lens so that the intraocular lens bulges toward a side away from the pressing structure; Wherein, the pressing structure is configured to be driven by the artificial lens to rotate relative to the introduction body.

2. The introduction head according to claim 1, characterized in that: The tablet pressing structure includes a tablet pressing body, a first connecting arm and a second connecting arm, wherein the first connecting arm and the second connecting arm are both rotatably connected to the introduction body; In which, the opening groove extends along the first direction, the tablet pressing 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 pressing body, and the second connecting arm is connected to the other side of the tablet pressing body, the first connecting arm, the second connecting arm and the tablet pressing body jointly define an avoidance space, the avoidance space is connected to the opening groove, and the first direction is perpendicular to the second direction.

3. The introduction head according to claim 1, characterized in that: The tablet pressing structure includes a hollow portion, and the hollow portion is located in the injection channel.

4. The introduction head according to claim 1, characterized in that: Along a second direction, two opposite side walls of the pressing sheet structure are interference-fitted with the groove wall of the opening groove, and the second direction is perpendicular to the first direction.

5. The introduction head according to claim 1, characterized in that: The pressing sheet structure includes a limiting portion, the limiting portion abuts against the outer peripheral wall of the introduction body, and the limiting portion covers a portion of the opening groove.

6. The introduction head according to claim 1, characterized in that: The push injection channel includes a first section and a second section, the first section is connected to the second section, and along the first direction, at least one cross-sectional area of ​​the first section and the second section gradually decreases, and the side of the first section away from the second section is used to abut the crystal bracket.

7. The introduction head according to claim 1, characterized in that: The introduction body is provided with a limit block, the pressing structure is rotatably connected to the limit block, and the limit block is used to press the crystal bracket.

8. A pre-installed intraocular lens implantation system, characterized in that: include: The push-injection sleeve is provided with a mounting groove, a first through groove and a second through groove, wherein the first through groove and the second through groove are both connected to the mounting groove, and along the first direction, the first through groove, the mounting groove and the second through groove are arranged in sequence; A push rod assembly, along the first direction, the push rod assembly is inserted into the first through slot, and the push rod assembly is movably connected to the injection sleeve; The introduction head according to any one of claims 1 to 7 is arranged in the second through groove along the first direction, and a part of the introduction head passes through the second through groove away from the side of the installation groove.

9. The preassembled intraocular lens implantation system according to claim 8, 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, the other end of the push rod is connected to the push head, the end of the push rod connected to the push head penetrates into the first through groove, and the push head is provided with a push groove on a side away from the push rod; Wherein, the depth of the injection groove is configured to be no less than the radius of the intraocular lens.

10. The preassembled intraocular lens implantation system according to claim 8, characterized in that: The pre-installed intraocular lens implantation system also includes a lens holder, which is detachably connected to the push injection sleeve at the location of the mounting groove. The crystal holder is provided with a third through groove, which is connected to the push injection channel. The cross-sectional area of ​​the push injection channel near one end of the crystal holder is larger than the cross-sectional area of ​​the third through groove.

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