Preloaded intraocular lens implantation system

Abstract

This invention is Preloaded An intraocular lens implantation system is disclosed, comprising: a barrel; Plunger , Push knob , and cartridge and cartridge An introduction passage is provided in the ocular lens, and a mounting groove for accommodating an intraocular lens is provided in the introduction passage, and a removable lens limiting member is provided in the mounting groove, and the lens limiting member includes a limiting plate, and the limiting plate Plunger In the direction of movement Plunger A stopper is provided to prevent the extension of the restricting plate into the introduction passage. Plunger A straight prevention support pillar is provided on the side in the direction of movement of the Preloaded The intraocular lens implantation system integrates rotation and thrust, has high implantation accuracy, a limiting plate prevents the lens from inverting, and a stopper and straightness prevention support column prevent the front loop from coming out straight. When the intraocular lens is implanted, the two loops hold the optical region and maintain a position where it is covered above it, preventing deformation of the intraocular lens and ensuring its position is stable. It is also easy to operate and efficient.

Description

[Technical Field]

[0001] The present invention belongs to the technical field of auxiliary medical devices, and more particularly to a pre-filled intraocular lens implantation system. [Background technology]

[0002]

[0003] An intraocular lens is a medical device that can be implanted into a patient's eye in place of a diseased natural lens. It is currently the most effective and direct means of correcting the refraction of aphakic eyes, and requires an implantation system to be inserted into the human eye. Conventional prefilled intraocular lens implantation systems consist of an intraocular lens and an implantation device, and are used to replace the ocular lens during surgery for ophthalmic diseases such as cataracts. During intraocular lens implantation surgery, prefilled intraocular lens implantation systems combine a placed intraocular lens with an implantation device, and, compared to non-prefilled systems, do not require tweezers to remove the intraocular lens, thereby speeding up the surgery and reducing the risk of patient infection. These systems are widely used in intraocular lens implantation surgery.

[0003] When implanting an intraocular lens in a bolus or precession type prefilled intraocular lens implantation system, a member containing the intraocular lens must be combined with a propelling member of the intraocular lens implantation system, and the propelling member must be used to push the intraocular lens into the human eye. However, the intraocular lens itself is more flexible, and the position of the intraocular lens is prone to change during transportation, requiring manual correction of the position of the crystalline lens, which is more tedious. In addition, when the propelling member is used to push the intraocular lens, the crystalline lens often inverts or the front loop protrudes straight. This prevents the intraocular lens from being bolus-injected into the human eye in a position where the optic region of the crystalline lens is held and covered by the two loops, resulting in a large incision required for injection into the human eye and an unsuccessful surgery.

[0004] The prior art Chinese utility model registration number CN212662028U discloses an intraocular lens bolus administration device in which a cylinder can be attached to an intraocular lens storage box prefilled with an intraocular lens, the box cavity being located inside the cylinder, with a box cavity opening formed at the bottom of the cylinder, and a pressing block opening provided directly above the box cavity opening in the cylinder, through which an inverted pressing block enters the box cavity through the pressing block opening and further contacts the intraocular lens, pressing it into a centrally concave state. Although the pressing block can fix the crystalline lens to a certain extent, because the crystalline lens is made of a more flexible elastic material, it is easily damaged under the simultaneous compression and bolus administration, and the phenomenon of the front loop coming out straight cannot be avoided. Based on this, it is necessary to develop a prefilled intraocular lens implantation system that can hold and cover the optical region of the crystalline lens with two loops when implanting the intraocular lens if there is no damage to the intraocular lens, and that is difficult to invert, ensuring the safety and stability of the crystalline lens implantation surgery. Summary of the Invention [Problem to be solved by the invention]

[0005] In response to the above-mentioned shortcomings of the prior art, the present invention provides a prefilled intraocular lens implantation system, which can hold the optical region of the crystalline lens with two loops and keep it covered above it when implanted without risk of damage to the intraocular lens, and is not easily inverted, ensuring the safety and stability of the crystalline lens implantation surgery and the stability of the prefilled intraocular lens implantation system when transported. [Means for solving the problem]

[0006] In order to achieve the above purpose of the invention, the technical solutions used by this invention are as follows:

[0007] 1. A prefilled intraocular lens implantation system, comprising: a cylindrical body having an empty cavity with both ends open; a bolus administration rod having one end extending along the opening at one end of the barrel into the empty cavity and extending along the empty cavity to the opening at the other end of the barrel; a rotating member provided between the cylindrical body and the bolus administration rod, the rotating member being driven to move the bolus administration rod up and down relative to the empty cavity; an introduction head, which is installed at an opening of the end of the cylindrical body away from the bolus administration rod, has an introduction passage provided therein, an attachment groove for accommodating an intraocular lens provided on the side of the introduction passage closer to the opening of the cylindrical body, a removable lens restricting member provided in the attachment groove, the lens restricting member including a limiting plate, a stopper provided on the rear side in the direction of movement of the bolus administration rod for preventing the bolus administration rod from extending into the introduction passage, and a straight prevention support pillar provided on the limiting plate on the front side in the direction of movement of the bolus administration rod; One end of the bolus administration rod extends along the rotating member into the empty cavity, enters the entrance of the introduction passage of the introduction head along the empty cavity, and abuts against the intraocular lens located in the introduction head, thereby pushing the intraocular lens along the introduction passage into the eye.

[0008] The present invention is a prefilled intraocular lens implantation system with integrated rotation and thrusting. The rotating member and the bolus injection rod are used in conjunction to directly thrust the bolus injection rod to thrust the intraocular lens to the ready position, and then rotate the rotating member to slowly thrust the bolus injection rod to accurately push the injection head out of the intraocular lens. A removable lens restricting member is provided in the mounting groove of the injection passage, and the lens restricting member includes a limiting plate to prevent the lens from inverting. A stopper that prevents the bolus injection rod from extending into the injection passage and a straightness prevention support column are provided in front of the movement direction of the bolus injection rod to prevent the front loop from extending straight out, preventing excessive implantation force from damaging the eye when the lens is implanted. When the intraocular lens is inserted into the human eye, the two loops not only hold and cover the optical region, but also ensure that the stopper prevents the bolus injection rod from shifting during transportation, ensuring the stability of the lens position, allowing the operator to safely and stably insert the intraocular lens into the human eye. Furthermore, the end of the bolus administration rod extending to the opening at the other end of the cylindrical body has a groove-like structure capable of holding the rear loop of the intraocular lens.

[0009] Furthermore, the limiting plate is provided with a clamping device for fixing the crystalline lens limiting member to the mounting groove or removing it from the mounting groove.

[0010] Furthermore, the clamping device includes a clamping portion and a removal handle, and the clamping portion and the removal handle are hingedly connected to the limiting plate.

[0011] Furthermore, an injection hole is provided in the limiting plate.

[0012] Furthermore, the rotating member has a sleeve open at both ends, the outer wall surface of the bolus administration rod is threadably connected to the sleeve, and the bolus administration rod passes through the sleeve and enters the empty cavity of the cylindrical body.

[0013] Furthermore, at least one boss is provided on the inner peripheral wall of the end of the sleeve away from the introduction head, and threads are provided on the at least one boss, and a thread groove that fits the threads is opened on the outer wall surface of the bolus administration rod.

[0014] Furthermore, the inner wall surface of the sleeve is rotatably connected to the outer wall surface of the cylindrical body.

[0015] Furthermore, the cylindrical body and the rotating member are rotatably connected by a limiting member, the limiting member includes a limiting groove and at least one limiting portion, the limiting groove is opened on the outer circumferential surface of the cylindrical body, and any one of the limiting portions is installed on the inner circumferential surface of the rotating member, after the rotating member is attached to the cylindrical body, the limiting portion is located within the limiting groove, and the limiting portion can rotate along the outer circumferential surface of the cylindrical body within the limiting groove, thereby allowing the rotating member to rotate relative to the cylindrical body.

[0016] Preferably, the depth of the groove body of the limiting groove is greater than the height of any one of the limiting portions, and / or the length of the groove body of the limiting groove is equal to the axial length of any one of the limiting portions, thereby restricting the axial movement of the limiting portion relative to the axial direction of the cylindrical body.

[0017] Preferably, the restriction is arranged to present a wedge.

[0018] Furthermore, a seal ring is further fitted to the bolus administration rod, and the seal ring is in sealing contact with the inner wall surface of the empty cavity.

[0019] Preferably, a seal groove is provided on the bolus administration rod for mounting the seal ring. [Effects of the Invention]

[0020] The beneficial effects of this invention are: First, the prefilled intraocular lens implantation system of the present invention integrates rotation and thrust, enabling the intraocular lens located in the introduction channel of the introduction head to be pushed into the eye accurately and safely, while minimizing the risk of injury to the human eye. (2) The prefilled intraocular lens implantation system of the present invention can prevent the front loop from coming out straight when pushing out the intraocular lens, and limits the displacement of the bolus injection rod during transportation, thereby avoiding deformation of the lens and ensuring the stability of the lens position. It is also easy to operate and efficient, improving the doctor's operating experience and the patient's safety during surgery. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic diagram of the overall structure of the implantation system according to the present invention. [Figure 2] FIG. 2 is a structural schematic diagram of the lens restricting member in this embodiment. [Figure 3] FIG. 3 is a schematic diagram of a connection structure between the rotary member and the cylindrical body shown in FIG. [Figure 4] FIG. 4 is a schematic diagram of the structure of the rotating member. [Figure 5] FIG. 5 is a schematic plan view of the structure of the rotating member. [Figure 6] FIG. 6 is a schematic cross-sectional view of the rotary member shown in FIG. [Figure 7] FIG. 7 is a structural schematic diagram of the bolus administration rod in this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0022] Specific embodiments of the present invention will be further described below with reference to the drawings, in which like parts are designated by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions away from the geometric center of a particular component, respectively. In order to facilitate a clearer and easier understanding of the content of the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention.

[0023] Example 1 1 and 2, a prefilled intraocular lens implantation system includes a cylindrical body 1 having an empty cavity 10 open at both ends, a bolus administration rod 2 having one end extending into the empty cavity 10 along the opening at one end of the cylindrical body 1 and extending along the empty cavity 10 to an opening at the other end of the cylindrical body 1, a rotating member 3 provided between the cylindrical body 1 and the bolus administration rod 2, which is driven by the rotating member 3 to move the bolus administration rod 2 up and down relative to the empty cavity 10, and an introduction passage provided inside the opening of the cylindrical body 1 at the end away from the bolus administration rod 2, and a mounting groove 13 for accommodating an intraocular lens provided on the side of the introduction passage closer to the opening of the cylindrical body 1, and a removable lens restricting member 14 provided above the mounting groove 13. The lens restricting member 14 includes a limiting plate 15, and a stopper 19 is provided on the limiting plate 15 on the rear side in the direction of movement of the bolus administration rod 2 to prevent the bolus administration rod 2 from extending into the introduction passage, and an introduction head 4 is provided with a straight prevention support pillar 17 on the front side in the direction of movement of the bolus administration rod 2 on the limiting plate 15. One end of the bolus administration rod 2 extends along the rotating member 3 into the empty cavity 10 and stops until it feels considerable resistance, and the removal handle 16 is grasped to pull out the lens restricting member 14 vertically upward, and then it enters the entrance of the introduction passage of the introduction head 4 along the empty cavity 10 and abuts against the intraocular lens located in the introduction passage, thereby pushing the intraocular lens along the introduction passage into the eye.

[0024] In a specific implementation process, when the prefilled intraocular lens implantation system needs to implant an intraocular lens, first, the bolus injection rod 2 is advanced until the rear loop of the intraocular lens is bent and reaches a predetermined position, and then a lens restricting member 14 is provided in the attachment groove 13 of the introduction passage, and the lens restricting member 14 includes a restricting plate 15, and the restricting plate 15 and the attachment groove 13 are used to restrict the up and down of the intraocular lens to prevent it from being inverted, and the restricting plate 15 is provided with a straightening prevention support pillar 17 on the side in the movement direction of the bolus injection rod 2, and the straightening prevention support pillar 17 is located in front of the front loop of the intraocular lens, and when the intraocular lens moves along the introduction passage, the two loops hold the optical region and maintain a position covered above it, so that the front The loop can be prevented from coming out straight, and a stopper 19 is provided in the direction of movement of the bolus administration rod 2. The stopper 19 prevents the bolus administration rod 2 from moving further within the introduction passage, and together with the straight prevention support column 17, can prevent the front loop from coming out straight. When implanting the intraocular lens, the lens restricting member 14 is removed and the bolus administration rod 2 is slowly driven by the rotating member 3 to safely, stably, and accurately push the intraocular lens into the human eye. This not only prevents the eye from being damaged by excessive implantation force, but also prevents the bolus administration rod 2 from being displaced during transportation, ensuring the stability of the position of the intraocular lens.

[0025] The prefilled intraocular lens implantation system of the present invention integrates rotation and thrust to accurately and safely push the intraocular lens located in the introduction channel of the introduction head 4 into the eye, minimizing injury to the human eye. The implantation system prevents the front loop from coming out straight when pushing out the intraocular lens, limits the displacement of the bolus injection rod 2 during transportation, prevents deformation of the crystalline lens, and ensures the stability of the crystalline lens position. It is also easy to operate and efficient, improving the doctor's experience during surgery and the safety of the patient during surgery.

[0026] Example 2 In order to further realize the integration of rotation and propulsion of this prefilled intraocular lens implantation system, based on Example 1, an optional solution is that the rotating member 3 has a sleeve with both ends open, the outer wall surface of the bolus administration rod 2 is threadedly connected to the sleeve, and the bolus administration rod 2 enters the empty cavity 10 of the cylindrical body 1 through the sleeve.

[0027] 3 to 6, as an alternative solution, at least one boss 5 is provided on the inner peripheral wall of the end of the sleeve remote from the introduction head 4, and at least one of the bosses 5 is provided with threads 6, and a thread groove 7 matching the threads 6 is opened on the outer wall surface of the bolus administration rod 2, and two or four bosses 5 can be provided according to actual needs, and each boss 5 is provided with threads 6. As an alternative solution, the inner wall surface of the sleeve is rotatably connected to the outer wall surface of the cylindrical body 1.

[0028] As an alternative solution, the cylindrical body 1 and the rotating member 3 are rotatably connected by a limiting member, which includes a limiting groove 8 and at least one limiting portion 9, the limiting groove 8 being opened on the outer circumferential surface of the cylindrical body 1 and one of the limiting portions 9 being installed on the inner circumferential surface of the rotating member 3. After the rotating member 3 is attached to the cylindrical body 1, the limiting portion 9 is located within the limiting groove 8 and can rotate along the outer circumferential surface of the cylindrical body 1 within the limiting groove 8, thereby allowing the rotating member 3 to rotate relative to the cylindrical body 1. Preferably, the depth of the groove body of the limiting groove 8 is greater than the height of any one of the limiting portions 9. As an alternative solution, the length of the groove body of the limiting groove 8 is equal to the axial length of any one of the limiting portions 9, thereby restricting the axial movement of the limiting portion 9 relative to the axial direction of the cylindrical body 1. Preferably, the limiting portion 9 is installed to form a wedge. The number of the limiting units 9 may be set as one, or, of course, may be set as two or four.

[0029] 7, in order to improve the sealing of the implantation system, an optional solution is to further install a sealing ring 11 on the bolus administration rod 2, which is in sealing contact with the inner wall surface of the empty cavity 10, and preferably, the sealing ring 11 is an O-ring. Preferably, the bolus administration rod 2 is provided with a sealing groove 12 for mounting the sealing ring 11.

[0030] In a specific implementation process, when the rotating block 3 is operated to rotate relative to the outer surface of the cylindrical body 1, the sleeve and the bolus administration rod 2 are threadedly connected, so that the torque of the sleeve is converted into a repetitive axial force that acts on the bolus administration rod 2, allowing the bolus administration rod 2 to move up and down in the axial direction along the empty cavity 10 of the cylindrical body 1, and when the bolus administration rod 2 moves down along the axial direction of the empty cavity 10, it can push the intraocular lens out of the introduction head 4.

[0031] When the rotating block 3 needs to be rotated, the limiting portion 9 can rotate along the outer circumferential surface of the cylindrical body 1 within the limiting groove 8, thereby allowing the rotating block 3 to rotate relative to the cylindrical body 1. To prevent the rotating block 3 from escaping from the limiting groove 8, the depth of the groove body of the limiting groove 8 can be made greater than the height of any one of the limiting portions 9, and the rotating block 3 will not escape from the limiting groove 8 when rotating relative to the cylindrical body 1. Naturally, by setting the length of the groove body of the limiting groove 8 equal to the axial length of any one of the limiting portions 9, the wall surfaces at both ends of the limiting portion 9 can be made to abut against the wall surfaces at which both ends of the groove body of the limiting groove 8 contact, and the rotating block 3 will rotate along the limiting groove 8. Furthermore, the limiting portion 9 can be restricted to axial movement relative to the axial direction of the cylindrical body 1, preventing the limiting portion 9 from escaping from the limiting groove 8. By converting the torque of the sleeve into repeated axial force of the bolus administration rod 2, the intraocular lens can be implanted slowly and accurately, reducing injury caused by implantation in the eye.

[0032] Example 3 In order to maintain the position where the two loops embrace and cover the optical region when the intraocular lens moves along the introduction passage and to prevent the front loop from coming out straight, an optional solution based on Example 1 or Example 2 is that the end of the bolus administration rod 2 extending to the opening at the other end of the cylindrical body 1 has a groove-like structure that can embrace the rear loop of the intraocular lens. Preferably, the groove is a U-shaped groove.

[0033] In a specific implementation process, when the U-shaped groove at the end of the bolus administration rod 2 that extends to the opening at the other end of the barrel 1 moves toward the intraocular lens, the rear loop of the intraocular lens can be made to embrace the optical region and be covered above it.

[0034] Example 4 To facilitate the removal and use of the lens limiting member 14, based on Example 1 or Example 2 and referring to Fig. 2, an optional solution is to provide a clamping device on the limiting plate 15 for fixing the lens limiting member 14 to the mounting groove 13 or removing it from the mounting groove 13. Preferably, the clamping device includes a clamping part 20 and a removal handle 16, and the clamping part 20 and the removal handle 16 are hingedly connected to the limiting plate 15.

[0035] As an alternative solution, the limiting plate 15 is provided with an injection hole 18, which is for replenishing or adding a liquid to protect or lubricate the intraocular lens, and preferably the liquid is sodium hyaluronate gel.

[0036] In a specific implementation, when it is necessary to fix or remove the clamping device, the removal handle 16 is pressed to fix or remove the clamping part 20 from the mounting groove 13 .

[0037] The above description is merely a preferred embodiment of the present utility model, and does not limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model. [Explanation of symbols]

[0038] 1 cylinder 2 bolus dosing rods 3 Rotating members 4. Introduction Head 5. Boss 6 screw teeth 7 Thread groove 8 Restriction groove 9 Restrictions 10 empty cavity 11 Seal ring 12 Seal groove 13 Mounting groove 14. Lens limiting element 15 Restriction board 16 Removal handle 17 Straight prevention support pillar 18 Injection hole 19 Stopper 20 Clamping part

Claims

1. 1. A prefilled intraocular lens implantation system, comprising: A cylindrical body (1) having an empty cavity (10) with both ends open; a bolus administration rod (2) having one end extending into the empty cavity (10) along the opening at one end of the cylindrical body (1) and extending along the empty cavity (10) to the opening at the other end of the cylindrical body (1); a rotating member (3) provided between the cylindrical body (1) and the bolus administration rod (2), the rotating member (3) being driven to move the bolus administration rod (2) up and down relative to the empty cavity (10); an introduction head (4) installed at an opening at the end of the cylindrical body (1) away from the bolus administration rod (2), with an introduction passage provided therein, with a mounting groove (13) for accommodating an intraocular lens provided on the side of the introduction passage closer to the opening of the cylindrical body (1), with a removable lens restricting member (14) provided in the mounting groove (13), with the lens restricting member (14) including a limiting plate (15), with a stopper (19) provided on the limiting plate (15) for preventing the bolus administration rod (2) from extending into the introduction passage in the movement direction of the bolus administration rod (2), and with a straightness prevention support column (17) provided on the side of the limiting plate (15) in the movement direction of the bolus administration rod (2); A prefilled intraocular lens implantation system characterized in that one end of the bolus administration rod (2) extends along the rotating member (3) into the empty cavity (10), enters the entrance of the introduction passage of the introduction head (4) along the empty cavity (10), and abuts against the intraocular lens positioned in the introduction passage, thereby pushing the intraocular lens along the introduction passage into the eye.

2. The prefilled intraocular lens implantation system according to claim 1, characterized in that the end of the bolus administration rod (2) extending to the opening at the other end of the cylindrical body (1) has a groove-like structure capable of embracing the rear loop of the intraocular lens.

3. The limiting plate (15) is provided with a clamping device for fixing the lens limiting member (14) to the mounting groove (13) or removing it from the mounting groove (13), Preferably, the clamping device includes a clamping portion (20) and a removal handle (16), and the clamping portion (20) and the removal handle (16) are hingedly connected to the limiting plate (15). A prefilled intraocular lens implantation system as described in claim 1, characterized in that the clamping device includes a clamping portion (20) and a removal handle (16), and the clamping portion (20) and the removal handle (16) are hingedly connected to the limiting plate (15).

4. 2. The prefilled intraocular lens implantation system according to claim 1, wherein the limiting plate (15) is provided with an injection hole (18).

5. The intraocular lens implantation system of claim 1, characterized in that the rotating member (3) has a sleeve open at both ends, the outer wall surface of the bolus administration rod (2) is threadably connected to the sleeve, and the bolus administration rod (2) passes through the sleeve into the empty cavity (10) of the cylindrical body (1).

6. The intraocular lens implantation system of claim 5, characterized in that at least one boss (5) is provided on the inner peripheral wall of the end of the sleeve away from the introduction head (4), at least one of the bosses (5) is provided with screw teeth (6), and a screw groove (7) that fits the screw teeth (6) is opened on the outer wall surface of the bolus administration rod (2).

7. 6. The intraocular lens implantation system according to claim 5, wherein the inner wall surface of the sleeve is rotatably connected to the outer wall surface of the barrel (1).

8. 6. The intraocular lens implantation system of claim 5, wherein the cylindrical body (1) and the rotating member (3) are rotatably connected by a restricting member, the restricting member including a restricting groove (8) and at least one restricting portion (9), the restricting groove (8) being opened on the outer circumferential surface of the cylindrical body (1), and any one of the restricting portions (9) being installed on the inner circumferential surface of the rotating member (3), and after the rotating member (3) is attached to the cylindrical body (1), the restricting portion (9) is located within the restricting groove (8), and the restricting portion (9) can rotate along the outer circumferential surface of the cylindrical body (1) within the restricting groove (8), thereby allowing the rotating member (3) to rotate relative to the cylindrical body (1).

9. An intraocular lens implantation system as described in claim 8, characterized in that the depth of the groove body of the limiting groove (8) is greater than the height of any one of the limiting portions (9) and / or the length of the groove body of the limiting groove (8) is equal to the axial length of any one of the limiting portions (9), thereby restricting the axial movement of the limiting portion (9) relative to the axial direction of the cylindrical body (1).

10. The intraocular lens implantation system according to claim 9, characterized in that the bolus administration rod (2) is further provided with a sealing ring (11), which is in sealing contact with the inner wall surface of the empty cavity (10).

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