Pre-loaded intraocular lens implantation system

Abstract

Disclosed is a pre-loaded intraocular lens implantation system, comprising a barrel, a plunger rod, a rotating member, and an insertion tip, wherein an insertion channel is arranged in the insertion tip; the insertion channel is provided with a mounting groove configured for accommodating the intraocular lens, and a detachable lens limiting member is arranged on the mounting groove; and the lens limiting member comprises a limiting plate, a stop block configured for preventing the plunger rod from extending into the insertion channel is arranged on the limiting plate in a moving direction of the plunger rod, and an anti-straightening haptic post is arranged on a side face of the limiting plate in the moving direction of the plunger rod. The pre-loaded intraocular lens implantation system integrates rotating and pushing, thereby ensuring high implantation accuracy. The system prevents the lens from flipping by means of the limiting plate, and prevents an anterior haptic from straightening by means of the stop block and the anti-straightening haptic post, thereby enabling the intraocular lens to maintain a posture where both haptics encircle and overlie an optical region during implantation; meanwhile, it can avoid the deformation of the intraocular lens and guarantee the position stability of the intraocular lens. The system features simple and efficient operation.

Description

A pre-installed intraocular lens implantation system Technical Field

[0001] The utility model belongs to the technical field of auxiliary medical devices, and more specifically, relates to a pre-installed intraocular lens implantation system. Background Art

[0002] An intraocular lens (IOL) is a medical device that can be implanted in the patient's eye to replace the diseased natural lens. It is currently the most effective and direct method for correcting aphakic refraction and requires an implant system to be inserted into the eye. Existing pre-installed IOL implantation systems consist of an IOL and an implanter, and are used for lens replacement surgery for ophthalmic conditions such as cataracts. During IOL implantation, the pre-installed IOL implantation system combines the pre-placed IOL and implanter. Compared to non-pre-installed systems, this system eliminates the need for forceps to grasp the IOL, speeding up the procedure and reducing the risk of infection. This makes it widely used in IOL implantation surgeries.

[0003] When implanting an IOL using a push-in or screw-in preloaded IOL implantation system, the IOL-holding component and the IOL implantation system's pusher assembly are combined, and the IOL is then pushed into the eye using the pusher assembly. However, because the IOL itself is relatively soft, its position can easily shift back and forth during transportation, requiring manual correction of the lens's position, which is quite troublesome. Furthermore, when the pusher assembly pushes the IOL, the lens often flips over or the anterior haptic protrudes, preventing the IOL from being injected into the eye with both haptics embracing and covering the optical zone of the lens. This results in a large incision and an unsuccessful surgery.

[0004] A Chinese utility model patent with prior art publication number CN212662028U discloses an intraocular lens (IOL) injector. The IOL is mounted in a pre-installed IOL storage case. The case cavity is located within the case cavity, with an opening formed at the bottom of the case cavity. A pressure block opening is provided in the case cavity, located directly above the opening. The pressure block allows a flipped-down pressure block to enter the case cavity through the opening, contacting the IOL and pressing it downward into a concave position. While the pressure block can secure the lens to a certain degree, the lens is made of a relatively soft, elastic material and is easily damaged by the simultaneous compression and injection, and the anterior haptic cannot be prevented from protruding. Therefore, a pre-installed IOL implantation system is needed that can maintain the IOL's dual haptic grip and coverage within the optical zone of the lens during implantation without risking damage to the IOL, preventing it from flipping over and ensuring a safe and stable implantation procedure.

[0005] Utility Model Content

[0006] In response to the above-mentioned deficiencies in the prior art, the present invention provides a pre-installed intraocular lens implantation system, which can maintain the intraocular lens implantation with double loops and cover the optical zone of the lens without causing the risk of damage to the intraocular lens, and is not prone to flipping, thereby ensuring the safety and stability of the lens implantation surgery and the transportation stability of the pre-installed intraocular lens implantation system.

[0007] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model is:

[0008] A pre-installed intraocular lens implantation system, comprising:

[0009] A cylinder having a cavity with two ends open;

[0010] An injection rod, one end of which extends into the cavity along an opening at one end of the barrel, and extends along the cavity toward an opening at the other end of the barrel;

[0011] a rotating member, the rotating member being disposed between the barrel and the injection rod, and driven by the rotating member to cause the injection rod to move up and down relative to the cavity;

[0012] An introduction head is provided at an opening at one end of the barrel away from the push rod, and an introduction channel is provided in the introduction head; a mounting groove for accommodating an intraocular lens is provided on one side of the introduction channel near the barrel opening, and a detachable lens stopper is provided on the mounting groove; the lens stopper includes a stopper plate, which is provided on the rear side of the stopper plate in the direction of movement of the push rod and is used to prevent the push rod from extending into the introduction channel, and an anti-straightening column is provided on the front side of the stopper plate in the direction of movement of the push rod;

[0013] One end of the push rod extends into the cavity along the rotating member, and enters the inlet of the introduction channel of the introduction head along the cavity, abutting against the artificial lens located in the introduction head to push the artificial lens into the eye along the introduction channel.

[0014] The present invention is directed to a pre-installed intraocular lens implantation system with an integrated rotation and push type. The rotating part is used in conjunction with the injection rod, and the injection rod can be directly pushed to push the intraocular lens to the preparation position. Then, the rotating part is rotated to slowly push the injection rod to accurately push the intraocular lens out of the introduction head. A detachable lens limiter is provided on the installation groove of the introduction channel. The lens limiter includes a limit plate to prevent the lens from turning over, and a block to prevent the injection rod from extending into the introduction channel and an anti-straight loop column on the front side of the movement direction of the injection rod to prevent the front loop from coming out directly. When the lens is implanted, it can not only prevent the implantation from being too forceful and causing eye damage, but also ensure that the intraocular lens maintains a posture of being covered above the optical zone with a double loop when being pushed into the human eye. Moreover, the block can prevent the injection rod from being displaced during transportation, thereby ensuring the position stability of the lens and ensuring that the operator can safely and stably push the intraocular lens into the human eye.

[0015] Furthermore, one end of the injection rod extending toward the opening at the other end of the barrel is a groove-shaped structure capable of enclosing the posterior haptic of the intraocular lens.

[0016] Furthermore, the limiting plate is provided with a clamping device for fixing the crystal limiting member in the mounting slot or removing it from the mounting slot.

[0017] Furthermore, the clamping device includes a clamping portion and a disassembly handle, and the clamping portion and the disassembly handle are hinged to the limiting plate.

[0018] Furthermore, an injection hole is provided on the limiting plate.

[0019] Furthermore, the rotating member is a sleeve with openings at both ends, the outer wall surface of the injection rod is threadedly connected to the sleeve, and the injection rod passes through the sleeve and enters the cavity of the cylinder.

[0020] Furthermore, at least one boss is provided on the inner peripheral wall of the end of the sleeve away from the introduction head, at least one of the bosses is provided with thread teeth, and the outer wall surface of the injection rod is provided with a thread groove adapted to the thread teeth.

[0021] Furthermore, the inner wall surface of the sleeve is rotatably connected to the outer wall surface of the cylinder.

[0022] Furthermore, the cylinder and the rotating member are rotatably connected via a limiting component, and the limiting component includes a limiting groove and at least one limiting portion, the limiting groove is opened on the outer circumference of the cylinder, and any of the limiting portions is arranged on the inner circumference of the rotating member. After the rotating member is installed on the cylinder, the limiting portion is located in the limiting groove, and the limiting portion can rotate along the outer circumference of the cylinder in the limiting groove, so that the rotating member rotates relative to the cylinder.

[0023] Preferably, the depth of the limiting groove is greater than the height of any limiting portion, and / or the length of the limiting groove is equal to the axial length of any limiting portion, so as to limit the axial movement of the limiting portion relative to the axial direction of the cylinder.

[0024] Preferably, the limiting portion is configured as a wedge.

[0025] Furthermore, a sealing ring is sleeved on the injection rod, and the sealing ring is in sealing contact with the inner wall surface of the cavity.

[0026] Preferably, a sealing groove for installing the sealing ring is provided on the injection rod.

[0027] The beneficial effects of the utility model are:

[0028] (1) The pre-installed intraocular lens implantation system provided by the present invention is a rotating and pushing system that can accurately and safely push the intraocular lens located in the introduction channel of the introduction head into the eye, thereby minimizing damage to the human eye;

[0029] (2) The pre-installed intraocular lens implantation system provided by the present invention can prevent the anterior loop of the intraocular lens from straight out when it is pushed out, while also limiting the displacement of the injection rod during transportation, thus avoiding deformation of the lens and ensuring the position stability of the lens. Furthermore, the system is simple and efficient to operate, improving the surgeon's operating experience and the patient's surgical safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram of the overall structure of the implant system of the present invention.

[0031] FIG2 is a schematic structural diagram of a crystal limiter in this embodiment.

[0032] FIG3 is a schematic diagram of the connection structure between the rotating member and the cylinder shown in FIG1 .

[0033] FIG4 is a schematic structural diagram of a rotating member.

[0034] FIG5 is a schematic diagram of the top structure of the rotating member.

[0035] FIG6 is a schematic cross-sectional structural diagram of the rotating member shown in FIG3 .

[0036] FIG. 7 is a schematic structural diagram of the injection rod in this embodiment.

[0037] Explanation of the accompanying drawings: 1 is a cylinder; 2 is an injection rod; 3 is a rotating part; 4 is an introduction head; 5 is a boss; 6 is a threaded tooth; 7 is a threaded groove; 8 is a limit groove; 9 is a limit part; 10 is a cavity; 11 is a sealing ring; 12 is a sealing groove; 13 is a mounting groove; 14 is a crystal limit part; 15 is a limit plate; 16 is a disassembly handle; 17 is an anti-straight loop column; 18 is an injection hole; 19 is a stopper; 20 is a clamping part. DETAILED DESCRIPTION

[0038] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. Identical parts are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inward" and "outward" refer to directions toward or away from the geometric center of a specific component, respectively. To facilitate a clear understanding of the present invention, the following provides a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings.

[0039] Example 1

[0040] A pre-installed intraocular lens implantation system, as shown in Figures 1 and 2, comprises: a barrel 1, the barrel 1 having a cavity 10 with openings at both ends; an injection rod 2, one end of the injection rod 2 extending into the cavity 10 along the opening at one end of the barrel 1, and extending along the cavity 10 toward the opening at the other end of the barrel 1; a rotating member 3, the rotating member 3 being arranged between the barrel 1 and the injection rod 2, and driven by the rotating member 3, the injection rod 2 moving up and down relative to the cavity 10; an introduction head 4, the introduction head 4 being arranged at the opening at one end of the barrel 1 away from the injection rod 2, and an introduction channel being provided in the introduction head 4; a mounting groove 1 for holding an intraocular lens is provided on one side of the introduction channel close to the opening of the barrel 1 3. A detachable crystal limiter 14 is provided on the upper portion of the mounting groove 13; the crystal limiter 14 includes a limiter plate 15, and a stopper 19 is provided on the limiter plate 15 at the rear side in the direction of movement of the push rod 2 for preventing the push rod 2 from extending into the introduction channel, and an anti-straight loop column 17 is provided on the limiter plate 15 at the front side in the direction of movement of the push rod 2; one end of the push rod 2 extends into the cavity 10 along the rotating member 3, stops when it feels considerable resistance, pinches the disassembly handle 16, pulls out the crystal limiter 14 vertically upward, continues to enter the entrance of the introduction channel of the introduction head 4 along the cavity 10, and abuts against the artificial lens located in the introduction channel to push the artificial lens into the eye along the introduction channel.

[0041] In the specific implementation process, when the artificial lens needs to be implanted, the pre-installed intraocular lens implantation system first advances the injection rod 2 to push the posterior loop of the intraocular lens to bend into place. Since the installation groove 13 of the introduction channel is provided with a crystal limiter 14; the crystal limiter 14 includes a limit plate 15, and the limit plate 15 and the installation groove 13 prevent the intraocular lens from flipping by limiting the upper and lower positions of the intraocular lens; at the same time, the limit plate 15 is provided with an anti-straight loop column 17 on the side of the movement direction of the injection rod 2, which is located in front of the anterior loop of the intraocular lens. As the IOL moves along the introduction channel, it maintains a double-haptic grip covering the optical zone to prevent the anterior haptic from protruding. A stopper 19 is provided in the direction of movement of the push rod 2. This block 19 prevents the push rod 2 from moving further within the introduction channel and, together with the anti-straightening post 17, prevents the anterior haptic from protruding. During IOL implantation, the lens stopper 14 is removed, and the push rod 2 is slowly advanced via the rotating member 3 to safely, stably, and accurately insert the IOL into the eye. This prevents excessive implantation force that could cause eye damage. The stopper 19 also prevents displacement of the push rod 2 during transportation, ensuring the stability of the IOL's position.

[0042] The pre-installed intraocular lens implantation system provided by this utility model features a rotating and pushing mechanism that accurately and safely pushes the intraocular lens located within the insertion channel of the insertion head 4 into the eye, minimizing damage to the eye. This implantation system prevents the anterior loop of the intraocular lens from being ejected while simultaneously limiting displacement of the injection rod 2 during transport, thus avoiding lens deformation and ensuring lens position stability. Furthermore, the system is simple and efficient to operate, enhancing both the surgeon's operating experience and the patient's surgical safety.

[0043] Example 2

[0044] In order to further realize the integration of rotation and pushing of the pre-installed intraocular lens implant system, on the basis of Example 1, as an optional solution, the rotating part 3 is a sleeve with openings at both ends, the outer wall surface of the pushing rod 2 is threadedly connected to the sleeve, and the pushing rod 2 passes through the sleeve and enters the cavity 10 of the barrel 1.

[0045] Referring to Figures 3-6, as an optional solution, at least one boss 5 is provided on the inner circumferential wall of the sleeve at the end away from the introduction head 4. At least one of the bosses 5 is provided with thread teeth 6. The outer wall of the injection rod 2 is provided with a thread groove 7 adapted to the thread teeth 6. Depending on actual needs, two or four bosses 5 can also be provided, each boss 5 being provided with thread teeth 6. As an optional solution, the inner wall of the sleeve is rotatably connected to the outer wall of the barrel 1.

[0046] As an optional solution, the cylinder 1 and the rotating member 3 are rotationally connected via a limiting component, and the limiting component includes a limiting groove 8 and at least one limiting portion 9. The limiting groove 8 is provided on the outer circumference of the cylinder 1, and any of the limiting portions 9 is provided on the inner circumference of the rotating member 3. After the rotating member 3 is mounted on the cylinder 1, the limiting portion 9 is located in the limiting groove 8, and the limiting portion 9 can rotate along the outer circumference of the cylinder 1 in the limiting groove 8, so that the rotating member 3 rotates relative to the cylinder 1. Preferably, the groove depth of the limiting groove 8 is greater than the height of any of the limiting portions 9. As an optional solution, the groove length of the limiting groove 8 is equal to the axial length of any of the limiting portions 9, so as to limit the axial movement of the limiting portion 9 relative to the axial direction of the cylinder 1. Preferably, the limiting portion 9 is provided in the form of a wedge. The number of the limiting portions 9 can be set to one, or of course, it can also be set to two or four.

[0047] To enhance the sealing performance of the implant system, as an optional solution, referring to FIG7 , a sealing ring 11 is further provided on the injection rod 2. The sealing ring 11 is in sealing contact with the inner wall of the cavity 10. Preferably, the sealing ring 11 is an O-ring. Preferably, a sealing groove 12 is provided on the injection rod 2 for mounting the sealing ring 11.

[0048] During the specific implementation process, when the rotating block 3 is operated and rotated relative to the outer circumference of the barrel 1, due to the threaded connection between the sleeve and the injection rod 2, the torque of the sleeve can be converted into an axial repetitive force and act on the injection rod 2, so that the injection rod 2 can perform an axial lifting and lowering movement along the cavity 10 of the barrel 1. When the injection rod 2 descends along the axial direction of the cavity 10, the artificial lens can be pushed out of the introduction head 4.

[0049] When the rotating block 3 needs to rotate, the limiting portion 9 can rotate along the outer circumference of the barrel 1 in the limiting groove 8 to allow the rotating block 3 to rotate relative to the barrel 1. In order to prevent the rotating block 3 from falling out of the limiting groove 8, the depth of the limiting groove 8 can be greater than the height of any limiting portion 9, so that the rotating block 3 will not fall out of the limiting groove 8 when rotating relative to the barrel 1. Of course, the length of the limiting groove 8 can also be set to be equal to the axial length of any limiting portion 9, so that the end walls of the limiting portion 9 abut against the contact walls of the limiting groove 8, and can rotate along the limiting groove 8. In this way, the axial movement of the limiting portion 9 relative to the axial direction of the barrel 1 can be restricted, the limiting portion 9 will not fall out of the limiting groove 8, and the torque of the sleeve can be converted into a repeated axial force of the injection rod 2, so that the intraocular lens can be implanted slowly and accurately, with less damage to the eye.

[0050] Example 3

[0051] In order to maintain the double-haptic embrace and cover the optic zone of the intraocular lens as it moves along the introduction channel and to prevent the anterior haptic from protruding, as an optional solution based on Example 1 or Example 2, the end of the injection rod 2 extending toward the other end opening of the barrel 1 is formed into a groove-shaped structure that can enclose the posterior haptic of the intraocular lens. Preferably, the groove is a U-shaped groove.

[0052] In a specific implementation process, when the U-shaped groove at one end of the injection rod 2 extending toward the opening at the other end of the barrel 1 moves toward the intraocular lens, the posterior loop of the intraocular lens can be embraced and covered above the optical zone.

[0053] Example 4

[0054] To facilitate the removal and use of the crystal stopper 14, based on Example 1 or Example 2, with reference to FIG2 , as an optional solution, the stopper plate 15 is provided with a clamping device for securing the crystal stopper 14 in the mounting slot 13 or removing it from the mounting slot 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 stopper plate 15.

[0055] As an optional solution, an injection hole 18 is provided on the limiting plate 15, and the injection hole 18 is used to supplement or add liquid for protecting or lubricating the intraocular lens. Preferably, the liquid is sodium hyaluronate gel.

[0056] In a specific implementation process, when the clamping device needs to be fixed or disassembled, it is only necessary to press the disassembly handle 16 to fix the clamping portion 20 on the installation groove 13 or disassemble it from the installation groove 13 .

[0057] The above description is only a preferred embodiment of the present utility model patent and does not constitute a limitation of the present utility model patent. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model patent shall be included in the scope of protection of the present utility model patent.

Claims

1. A pre-installed intraocular lens implantation system, characterized in that: include: A cylinder (1), wherein the cylinder (1) has a cavity (10) with two ends open; An injection rod (2), one end of which extends into the cavity (10) along an opening at one end of the barrel (1) and extends along the cavity (10) toward an opening at the other end of the barrel (1); A rotating member (3), the rotating member (3) being arranged between the barrel (1) and the injection rod (2), and driven by the rotating member (3), the injection rod (2) moves up and down relative to the cavity (10); An introduction head (4), the introduction head (4) is arranged at an opening of one end of the barrel (1) away from the injection rod (2), and an introduction channel is provided in the introduction head (4); a mounting groove (13) for holding an artificial lens is provided on one side of the introduction channel close to the opening of the barrel (1), and a detachable crystal stopper (14) is provided on the mounting groove (13); the crystal stopper (14) includes a stopper plate (15), a stopper (19) for preventing the injection rod (2) from extending into the introduction channel is provided on the stopper plate (15) in the direction of movement of the injection rod (2), and an anti-straight loop column (17) is provided on the side of the stopper plate (15) in the direction of movement of the injection rod (2); One end of the injection rod (2) extends into the cavity (10) along the rotating member (3), and enters the inlet of the introduction channel of the introduction head (4) along the cavity (10), and abuts against the artificial lens located in the introduction channel to push the artificial lens into the eye along the introduction channel.

2. The preassembled intraocular lens implant system according to claim 1, characterized in that: One end of the injection rod (2) extending toward the opening at the other end of the barrel (1) is a groove-shaped structure capable of enclosing the posterior loop of the artificial lens.

3. The preassembled intraocular lens implantation system according to claim 1, wherein: The limiting plate (15) is provided with a clamping device for fixing the crystal limiting member (14) in the installation groove (13) or removing it from the installation groove (13). Preferably, the clamping device comprises a clamping portion (20) and a disassembly handle (16), and the clamping portion (20) and the disassembly handle (16) are hinged to the limiting plate (15).

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

5. The intraocular lens implant system according to claim 1, characterized in that: The rotating member (3) is a sleeve with openings at both ends. The outer wall surface of the injection rod (2) is threadedly connected to the sleeve, and the injection rod (2) passes through the sleeve and enters the cavity (10) of the barrel (1).

6. The intraocular lens implantation system according to 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 thread teeth (6), and the outer wall surface of the injection rod (2) is provided with a thread groove (7) adapted to the thread teeth (6).

7. The intraocular lens implantation system according to claim 5, characterized in that: The inner wall surface of the sleeve is rotatably connected to the outer wall surface of the cylinder (1).

8. The intraocular lens implantation system according to claim 5, characterized in that: The cylinder (1) and the rotating member (3) are rotatably connected via a limiting member, wherein the limiting member comprises a limiting groove (8) and at least one limiting portion (9), wherein the limiting groove (8) is provided on the outer peripheral surface of the cylinder (1), and any one of the limiting portions (9) is provided on the inner peripheral surface of the rotating member (3). After the rotating member (3) is mounted on the cylinder (1), the limiting portion (9) is located in the limiting groove (8), and the limiting portion (9) can rotate along the outer peripheral surface of the cylinder (1) in the limiting groove (8), so that the rotating member (3) rotates relative to the cylinder (1).

9. The intraocular lens implant system according to claim 8, characterized in that: The depth of the limiting groove (8) is greater than the height of any of the limiting portions (9), and / or the length of the limiting groove (8) is equal to the axial length of any of the limiting portions (9), so as to limit the axial movement of the limiting portion (9) relative to the axial direction of the cylinder (1).

10. The intraocular lens implant system according to claim 9, characterized in that: A sealing ring (11) is also sleeved on the injection rod (2), and the sealing ring (11) is in sealing contact with the inner wall surface of the cavity (10).

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