Preassembled three-loop sclera suture fixed posterior chamber intraocular lens

Abstract

The invention discloses a preassembled three-loop sclera suture fixed posterior chamber intraocular lens which comprises a three-loop intraocular lens body, the three-loop intraocular lens body is provided with three loops, and a loop incisura is preset on each loop; one end of each sewing thread is connected to the loop incisura, and the other end of each sewing thread is connected to the sewing needle; the preassembling system comprises an injector for pushing the folded three-loop intraocular lens body into the human eyes; the intraocular lens has the beneficial effects that the contact time of the intraocular lens with the eyelid margin and ocular surface flora is shortened, the risk of intraocular infection is reduced, and the prognosis of intraocular lens sclera suture fixation is improved; the risk that the artificial lens is damaged in the sclera suture fixation operation is reduced, and the postoperative visual quality of a patient is guaranteed; the duration required by the sclera suture fixation operation of the artificial lens is shortened, and the risk of related complications in the operation is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of medical implants, and in particular relates to a pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens. Background Art

[0002] Cataract surgery is a common method for treating cataracts in ophthalmology. It is performed by removing the cloudy natural lens and implanting an artificial lens to restore vision. Currently, the most widely used method of artificial lens implantation is to implant a posterior chamber artificial lens into the capsular bag while retaining the natural lens capsular bag to provide stable support. However, in the following situations, the surgeon often needs to consider fixing the artificial lens in the eyeball with scleral sutures:

[0003] 1. Lack of adequate support structure: If the capsular bag is missing or ruptured due to congenital developmental abnormalities, trauma, secondary to other eye diseases, intraocular infection, etc., the intraocular lens needs additional fixation to maintain its position;

[0004] 2. Intraoperative injury: If the capsular bag ruptures or becomes structurally unstable during cataract surgery, making it impossible to properly fix the intraocular lens using the original implantation method, suture fixation may be required;

[0005] 3. Postoperative complications: Due to reasons such as capsular bag necrosis syndrome, retinitis pigmentosa, pseudocapsular exfoliation syndrome or trauma after surgery, the original lens suspensory ligament or capsular bag undergoes progressive lesions, making it impossible to maintain the normal anatomical position of the intraocular lens and the capsular bag complex. In this case, the intraocular lens and its fixation method may need to be replaced;

[0006] Currently, there is no posterior chamber intraocular lens specifically used for scleral suture fixation; existing intraocular lenses cannot guarantee stability and safety after suture implantation.

[0007] In addition, infection is one of the most common complications in cataract extraction combined with intraocular lens implantation. Once an intraocular infection occurs, the cost of treatment is high and the prognosis is poor. In severe cases, it can lead to consequences such as eyeball atrophy, sympathetic ophthalmia, and eyeball removal. However, the eyelid margin and eyelash roots contain a large number of infection sources such as bacteria and viruses, and conventional preoperative disinfection cannot guarantee their complete elimination. With existing technology, traditional intraocular lenses will inevitably touch the eyelid margin and eyelash roots during scleral suture fixation and injection, and be contaminated with infection sources, posing an infection risk. In addition, when the surgeon performs complex cataract surgery, especially combined intraocular lens scleral suture fixation, the intraocular lens needs to be folded and inserted through a larger incision. (about 3.5mm-4mm) is implanted into the eye. On the one hand, there is a risk of the optical part being damaged by the operating instruments, resulting in a decrease in the patient's postoperative visual quality. On the other hand, it also increases the chance of infection, the length of postoperative healing and the incidence of surgical astigmatism. In the specific scleral suture fixation process, the surgeon often needs to first fix the suture on the artificial lens loop by repeatedly tying knots to prevent the suture from slipping. This process is time-consuming, which greatly increases the risk of surgical incision bleeding, intraocular tissue bleeding, retinal detachment and infection. In addition, different sutures are prone to entanglement with each other or the optical part of the artificial lens during the artificial lens implantation process, further increasing the duration of the operation and the risk of complications. Summary of the invention

[0008] The purpose of the present invention is to provide a preloaded three-loop scleral suture-fixed posterior chamber intraocular lens, which uses a preloaded injection system to assist the implantation of a three-loop posterior chamber intraocular lens with pre-set sutures specifically for scleral suture fixation, which can effectively reduce the probability of surgical infection, intraocular lens damage, suture entanglement, etc., reduce the incision required for surgery, and shorten the duration of surgical operations.

[0009] To achieve the above object, the present invention provides the following technical solution: a pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens, comprising

[0010] A three-haptic intraocular lens body, wherein the three-haptic intraocular lens body has three haptics, and a haptic notch is preset on each haptic;

[0011] Sutures and suture needles, one end of each suture is connected to the loop notch, and the other end is connected to the suture needle;

[0012] A preloading system, the preloading system includes an injector for pushing the folded three-haptic intraocular lens body into the human eye, a loading area for placing the preloaded three-haptic intraocular lens body and folding the three-haptic intraocular lens body, an introduction head with a three-haptic intraocular lens body loading area and a three-haptic intraocular lens body injection channel, and the interior of the loading area is provided with a suture needle placement groove 1 and a suture needle placement groove 2 for placing suture needles.

[0013] Preferably, the sutures include a first suture, a second suture, and a third suture. The sutures are made of polypropylene, have a thickness of 10-0, 9-0, or 8-0, are in the shape of double-strand sutures, and the three sutures are of different colors.

[0014] Preferably, the caliber of the introduction head is ≥1.8 mm.

[0015] Preferably, the suture needles include a first suture needle, a second suture needle, and a third suture needle, and the length of the suture needles is a metal straight needle of 5mm-8mm.

[0016] Preferably, the three-haptic intraocular lens body is made of cross-linked polyolefin, the optical part is designed as a biconvex aspheric surface, and the refractive power range is 0.5D to 36.0D.

[0017] Preferably, when the diopter range is 0.5D to 30.0D, it increases by 0.5D; when the diopter range is 30.0D to 36.0D, it increases by 1.0D.

[0018] Preferably, the total diameter of the three-haptic intraocular lens body is 11.0mm-14.5mm, and the three-haptic intraocular lens body includes fool-proof design haptics, haptic angles, and a main body / optical zone. The diameter of the main body / optical zone is 6.5mm-8.0mm, the haptic angle is 5°-10°, and the haptic width is ≥0.28mm.

[0019] Preferably, it also includes a viscoelastic agent to assist the implantation of the three-haptic intraocular lens body 3, and the viscoelastic agent can be injected into the push channel and the loading area.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] It reduces the time that the intraocular lens is in contact with the eyelid margin and ocular surface flora, reduces the risk of intraocular infection, and improves the prognosis of intraocular lens scleral suture fixation.

[0022] It reduces the risk of intraocular lens being damaged during scleral suture fixation and ensures the patient's postoperative visual quality;

[0023] It shortens the time required for intraocular lens scleral suture fixation and reduces the risk of intraoperative complications;

[0024] The surgical incision required for intraocular lens scleral suture fixation was reduced from 3.5-4.0 mm to 2.0-2.2 mm, which reduced the pain of patients and accelerated the healing of eyeball tissue after surgery.

[0025] The possibility of confusion between different sutures during intraocular lens scleral suture fixation is reduced, the difficulty of training for intraocular lens scleral suture fixation in clinical training is reduced, and the learning curve is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens of the present invention;

[0027] Figure 2 is a schematic diagram of a three-hook intraocular lens of the present invention;

[0028] Figure 3 It is a schematic diagram of the introduction head of the present invention;

[0029] Figure 4 It is an assembly diagram of the implant system of the present invention;

[0030] In the figure: 1. first suture needle; 2. first suture thread; 3. three-haptic intraocular lens body; 3.1. fool-proof design haptics; 3.2. haptics; 3.3. haptic angle; 3.4. haptic notch; 3.5. main body / optical area; 4. second suture needle; 5. second suture thread; 6. injector; 7. third suture thread; 8. third suture needle; 9. introduction head; 9.1. injection channel; 9.2. suture needle placement groove 1; 9.3. loading area; 9.4. suture needle placement groove 2. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a second sewing needle example of the present invention, and all belong to the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figure 1-Figure 4 , which is the first embodiment of the present invention, provides a pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens, comprising

[0034] A three-hook intraocular lens body 3, wherein the three-hook intraocular lens body 3 has three haptics 3.2, and each haptic 3.2 is preset with a haptic angle 3.3; the material of the three-hook intraocular lens body 3 is cross-linked polyolefin, and the optical part is designed as a biconvex aspheric surface, and the diopter range is 0.5D to 36.0D; when the diopter range is 0.5D to 30.0D, it increases by 0.5D; the total diameter of the three-hook intraocular lens body 3 is 11.0mm to 14.5mm, and the three-hook intraocular lens body 3 includes a fool-proof design haptic 3.1, a haptic angle 3.3, and a main body / optical zone 3.5, wherein the diameter of the main body / optical zone 3.5 is 6.5mm to 8.0mm, the haptic angle 3.3 is 5° to 10°, and the haptic width is ≥ 0.28mm;

[0035] Sutures and suture needles, one end of each suture is connected to the loop notch 3.4, and the other end is connected to the suture needle; the sutures include a first suture 2, a second suture 5, and a third suture 7, the sutures are made of polypropylene, the thickness is 10-0, 9-0 or 8-0, the shape is a double-strand suture, and the three sutures are of different colors; the suture needles include a first suture needle 1, a second suture needle 4, and a third suture needle 8, and the length of the suture needles is a metal straight needle of 5mm-8mm;

[0036] The preloading system includes an injector 6 for pushing the folded three-hook intraocular lens body 3 into the human eye, a loading area 9.3 for placing the preloaded three-hook intraocular lens body 3 and folding the three-hook intraocular lens body 3, an introduction head 9 having a three-hook intraocular lens body 3 loading area 9.3 and a three-hook intraocular lens body 3 injection channel 9.1, and the caliber of the introduction head 9 is ≥1.8mm; the interior of the loading area 9.3 is provided with a suture needle placement groove 1 9.2 and a suture needle placement groove 2 9.4 for placing suture needles.

[0037] Example 2

[0038] See also Figure 1-Figure 4 , which is the second embodiment of the present invention, is based on the previous embodiment, except that:

[0039] The material of the three-haptic intraocular lens body 3 is cross-linked polyolefin, and the optical part is designed as a biconvex aspheric surface, with a diopter range of 0.5D to 36.0D, and increases by 1.0D when the diopter range is 30.0D to 36.0D.

[0040] It also includes a viscoelastic agent to assist the implantation of the three-haptic intraocular lens body 3, and the viscoelastic agent can be injected into the push channel 9.1 and the loading area 9.3.

[0041] The working principle and use process of the present invention are as follows: the sutures with suture needles are respectively connected to the haptic notches 3 and 4 of the three-haptic intraocular lens body 3;

[0042] The three-hook intraocular lens body 3 is pre-installed in the loading area 9.3 of the introduction head 9, and the three suture needles are placed in the groove of the introduction head 9 and the injection channel 9.1 respectively;

[0043] When in use, first inject an appropriate amount of viscoelastic agent into the injection channel 9.1 and the loading area 9.3;

[0044] Then take the sewing needle out of the groove;

[0045] The three-hook intraocular lens body 3 is folded by buckling the introduction head 9;

[0046] Transfer the introduction head 9 to the injection device 6;

[0047] Implanting the three-hook intraocular lens body 3 into the posterior chamber of the human eye through the corneal incision;

[0048] The three lateral haptics are fixed on the sclera by sutures to ensure that the three-haptic intraocular lens body 3 is centered and stable, so that the three-haptic intraocular lens body 3 can play its function as a refractive medium to correct aphakia.

[0049] Although the embodiments of the present invention have been shown and described, as detailed above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens, characterized in that: include A three-haptic intraocular lens body (3), wherein the three-haptic intraocular lens body (3) has three haptics (3.2), and each haptic (3.2) is preset with a haptic notch (3.4); Sutures and suture needles, one end of each suture is connected to the loop notch (3.4), and the other end is connected to the suture needle; A preloading system, the preloading system comprising an injector (6) for pushing a folded three-hook intraocular lens body (3) into a human eye, a loading area (9.3) for placing the preloaded three-hook intraocular lens body (3) and folding the three-hook intraocular lens body (3), an introduction head (9) having a three-hook intraocular lens body (3) loading area (9.3) and a three-hook intraocular lens body (3) injection channel (9.1), and a suture needle placement groove 1 (9.2) and a suture needle placement groove 2 (9.4) for placing suture needles are arranged inside the loading area (9.3).

2. The pre-assembled three-hook scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: The sutures include a first suture (2), a second suture (5), and a third suture (7). The sutures are made of polypropylene, have a thickness of 10-0, 9-0, or 8-0, are in the shape of double-strand sutures, and the three sutures are of different colors.

3. The pre-assembled three-hook scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: The caliber of the introduction head (9) is ≥1.8 mm.

4. The pre-assembled three-hook scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: The suture needles include a first suture needle (1), a second suture needle (4), and a third suture needle (8), and the length of the suture needles is a metal straight needle with a length of 5mm-8mm.

5. The pre-assembled three-hook scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: The material of the three-haptic intraocular lens body (3) is cross-linked polyolefin, the optical part is designed as a biconvex aspheric surface, and the diopter range is 0.5D to 36.0D.

6. The pre-assembled three-hook scleral suture-fixed posterior chamber intraocular lens according to claim 5, characterized in that: When the diopter range is 0.5D to 30.0D, it increases by 0.5D; when the diopter range is 30.0D to 36.0D, it increases by 1.0D.

7. The pre-assembled three-hook scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: The total diameter of the three-haptic intraocular lens body (3) is 11.0 mm to 14.5 mm, and the three-haptic intraocular lens body (3) comprises a foolproof design haptic (3.1), a haptic angle (3.3), and a main body / optical zone (3.5). The diameter of the main body / optical zone (3.5) is 6.5 mm to 8.0 mm, the haptic angle (3.3) is 5° to 10°, and the haptic width is ≥0.28 mm.

8. The pre-assembled three-hook scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: It also includes a viscoelastic agent for assisting the implantation of the three-hook artificial lens body (3), and the viscoelastic agent can be injected into the push injection channel (9.1) and the loading area (9.3).

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