Preassembled three-loop sclera suture fixed posterior chamber intraocular lens

Abstract

The utility model 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 advantages 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 utility model belongs to the medical implant technical field, concretely relates to prepackaged three-loops scleral suture fixed posterior chamber intraocular lens. BACKGROUND

[0002] Cataract surgery is a common method for treating cataract in clinical ophthalmology, which restores vision by removing the cloudy natural lens and implanting an artificial lens; at present, the most widely used artificial lens implantation method is to implant a posterior chamber intraocular lens into the capsular bag under the premise of retaining the natural lens capsule bag, so that it is stably supported; however, when facing the following situations, the operator often needs to consider using the method of fixing the artificial lens with scleral suture in the eyeball:

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

[0004] 2. Intraoperative injury: if the capsular bag is ruptured or unstable during cataract surgery, the original implantation method cannot normally fix the artificial lens, and suture fixation may be needed;

[0005] 3. Postoperative complications: due to postoperative capsular necrosis syndrome, retinal pigment degeneration, pseudo capsular membrane peeling syndrome or trauma, etc., the original lens zonular ligament or capsular bag has progressive pathological changes, which cannot maintain the normal anatomic position of the artificial lens and capsular bag complex, at this time, the artificial lens and its fixation method may need to be replaced;

[0006] There is no posterior chamber intraocular lens specifically used for scleral suture fixation at present; the existing artificial lens cannot guarantee the stability and safety after suture implantation.

[0007] In addition, in the cataract extraction combined with intraocular lens implantation, infection is one of the most common complications; once intraocular infection occurs, the treatment cost is high, the prognosis is poor, and in severe cases, it can lead to eye atrophy, sympathetic ophthalmia, eye enucleation and other consequences; however, the eyelid margin and the root of the eyelashes contain a large amount of bacteria, viruses and other infection sources, and routine preoperative disinfection cannot guarantee to completely kill them; using the prior art, the conventional intraocular lens is inevitably in contact with the eyelid margin and the root of the eyelashes during scleral suture fixation and injection, and the infection source is contaminated, forming an infection risk; in addition, when the operator performs complex cataract surgery, especially combined with intraocular lens scleral suture fixation, the intraocular lens needs to be implanted into the eye through a larger incision (about 3.5-4 mm) after being folded, on the one hand, there is a risk that the optical part is damaged by the operating instrument, 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 operator often needs to fix the suture in the haptic of the intraocular lens in the form of repeated knots to avoid suture slippage; this process takes a long time, greatly increasing the risk of incision bleeding, intraocular tissue bleeding, retinal detachment and infection caused by surgery; and different sutures are prone to entangle each other or with the optical part of the intraocular lens during the intraocular lens implantation process, further increasing the operation time and complication risk. Utility model content

[0008] The utility model discloses a preassembled three-haptic scleral suture fixation posterior chamber intraocular lens, which uses a preassembled injection system to assist the implantation of a three-haptic posterior chamber intraocular lens specially used for scleral suture fixation and provided with preset sutures, can effectively reduce the probability of occurrence of surgical infection, intraocular lens damage and suture entanglement, and can reduce the incision required for surgery and the operation time.

[0009] To achieve the above object, the utility model provides the following technical scheme: a preassembled three-haptic scleral suture fixation posterior chamber intraocular lens, comprising

[0010] A three-haptic intraocular lens body has three haptics, and each haptic is provided with a haptic notch;

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

[0012] A preassembled system comprises an injector for pushing the folded three-haptic intraocular lens body into the human eye, a loading area for placing the preassembled three-haptic intraocular lens body and folding the three-haptic intraocular lens body, a guide head having a three-haptic intraocular lens body loading area and a three-haptic intraocular lens body injection channel, and the inside of the loading area is provided with a suture needle placement groove one and a suture needle placement groove two for placing the suture needle.

[0013] Preferably, the suture includes a first suture, a second suture and a third suture, the suture is made of polypropylene, the thickness is 10-0, 9-0 or 8-0, the shape is double-stranded suture, and the three sutures are different colors.

[0014] Preferably, the diameter of the lead-in head is greater than or equal to 1.8 mm.

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

[0016] Preferably, the material of the three-loop intraocular lens body is cross-linked polyolefin, the optical part is designed as a biconvex aspheric surface, and the diopter range is 0.5D-36.0D.

[0017] Preferably, when the diopter range is 0.5D-30.0D, the increment is 0.5D; and when the diopter range is 30.0D-36.0D, the increment is 1.0D.

[0018] Preferably, the total diameter of the three-loop intraocular lens body is 11.0-14.5 mm, and the three-loop intraocular lens body includes a fool-proof design loop, a loop included angle, and a main body / optical zone, the diameter of the main body / optical zone is 6.5-8.0 mm, the loop included angle is 5-10°, and the loop width is greater than or equal to 0.28 mm.

[0019] Preferably, it further includes a viscoelastic agent for implanting the auxiliary three-loop 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 utility model has the advantages of:

[0021] The utility model reduces the contact time of the intraocular lens with the eyelid margin and ocular flora, reduces the risk of intraocular infection, and improves the prognosis of the intraocular lens scleral suture fixation;

[0022] The utility model reduces the risk of damage to the intraocular lens in the scleral suture fixation, and guarantees the visual quality of the patient after the operation;

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

[0024] The utility model reduces the surgical incision required for the intraocular lens scleral suture fixation from 3.5-4.0 mm to 2.0-2.2 mm, reduces the pain of the patient, and accelerates the healing of the eyeball tissue after the operation;

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

[0026] Figure 1 It is a schematic diagram of the preassembled three-loop scleral suture fixation type posterior chamber intraocular lens of the utility model;

[0027] Figure 2 It is a schematic diagram of the three-loop intraocular lens of the utility model;

[0028] Figure 3 It is a schematic diagram of the guide head of the utility model;

[0029] Figure 4 It is an assembly drawing of the implantation system of the utility model;

[0030] In the figure: 1, first suture needle; 2, first suture; 3, three-loop intraocular lens body; 3.1, fool-proof design loop; 3.2, loop; 3.3, loop included angle; 3.4, loop notch; 3.5, main body / optical zone; 4, second suture needle; 5, second suture; 6, push injector; 7, third suture; 8, third suture needle; 9, guide head; 9.1, push injection channel; 9.2, suture needle placing groove one; 9.3, loading area; 9.4, suture needle placing groove two. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the utility model, and all belong to the protection scope of the utility model.

[0032] Embodiment 1

[0033] Please refer to Figures 1-4 It is the first embodiment of the utility model, which provides a preassembled three-loop scleral suture fixation type posterior chamber intraocular lens, comprising

[0034] The three-loop intraocular lens body 3 has three loops 3.2, and each loop 3.2 is provided with a loop included angle 3.3; the material of the three-loop 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-36.0D; when the diopter range is 0.5D-30.0D, the increment is 0.5D; the total diameter of the three-loop intraocular lens body 3 is 11.0mm-14.5mm, and the three-loop intraocular lens body 3 comprises a fool-proof design loop 3.1, a loop included angle 3.3 and a main body / optical zone 3.5, the diameter of the main body / optical zone 3.5 is 6.5mm-8.0mm, the loop included angle 3.3 is 5°-10°, and the loop width is greater than or equal to 0.28mm;

[0035] The suture needle is connected to the loop incision 3.4 of the three-loop intraocular lens body 3, and the other end is connected to the suture needle; the suture needle comprises a first suture needle 1, a second suture needle 4 and a third suture needle 8, and the length of the suture needle is 5mm-8mm of a metal straight needle;

[0036] The preloading system comprises a push injector 6 for pushing the folded three-loop intraocular lens body 3 into the human eye, a loading area 9.3 for placing the preloaded three-loop intraocular lens body 3 and folding the three-loop intraocular lens body 3, a guide head 9 provided with a three-loop intraocular lens body 3 loading area 9.3 and a three-loop intraocular lens body 3 push channel 9.1, and the caliber of the guide head 9 is greater than or equal to 1.8mm; the inside of the loading area 9.3 is provided with a suture needle placing groove one 9.2 and a suture needle placing groove two 9.4 for placing the suture needle.

[0037] Embodiment 2

[0038] Please refer to Figures 1-4 As a second embodiment of the utility model, the embodiment is based on the previous embodiment, and the difference lies in that:

[0039] The material of the three-loop 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-36.0D, and when the diopter range is 30.0D-36.0D, the increment is 1.0D.

[0040] The preloading system comprises a push injector 6 for pushing the folded three-loop intraocular lens body 3 into the human eye, a loading area 9.3 for placing the preloaded three-loop intraocular lens body 3 and folding the three-loop intraocular lens body 3, a guide head 9 provided with a three-loop intraocular lens body 3 loading area 9.3 and a three-loop intraocular lens body 3 push channel 9.1, and the caliber of the guide head 9 is greater than or equal to 1.8mm; the inside of the loading area 9.3 is provided with a suture needle placing groove one 9.2 and a suture needle placing groove two 9.4 for placing the suture needle.

[0041] The working principle and use process of the utility model are as follows: the suture needle is connected to the loop incision 3.4 of the three-loop intraocular lens body 3,

[0042] The three-loop intraocular lens body 3 is preloaded to the loading area 9.3 of the introduction head 9, and the three suture needles are respectively placed in the recess and the injection channel 9.1 of the introduction head 9;

[0043] In use, an appropriate amount of viscoelastic agent is injected into the injection channel 9.1 and the loading area 9.3;

[0044] Then the suture needle is taken out from the recess;

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

[0046] The introduction head 9 is transferred to the injector 6;

[0047] The three-loop intraocular lens body 3 is implanted into the posterior chamber of the human eye through the corneal incision;

[0048] The three suture needles are fixed to the sclera to ensure that the three-loop intraocular lens body 3 is centrally and stably positioned, so that the three-loop intraocular lens body 3 can play the function of dioptric medium to correct the aphakia.

[0049] Although the embodiments of the utility model have been shown and described in detail, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens, characterized in that: include The three-loop intraocular lens body (3) has three loops (3.2), and each loop (3.2) has a loop notch (3.4) pre-set on it; The sutures and needles are provided, with one end of each suture connected to the loop notch (3.4) and the other end connected to the needle. The pre-installation system includes an injector (6) for pushing a folded tri-loop intraocular lens body (3) into the human eye, a loading area (9.3) for placing the pre-installed tri-loop intraocular lens body (3) and folding the tri-loop intraocular lens body (3), an inlet head (9) having a loading area (9.3) of the tri-loop intraocular lens body (3) and an injection channel (9.1) of the tri-loop intraocular lens body (3), and the interior of the loading area (9.3) is provided with a needle placement groove one (9.2) and a needle placement groove two (9.4) for placing a suture needle.

2. The pre-installed three-loop 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 thickness of which is 10-0, 9-0, or 8-0, and the shape is a double-strand suture.

3. The pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: The inlet head (9) has a diameter ≥ 1.8 mm.

4. The pre-installed three-loop 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 straight metal needle of 5mm-8mm.

5. The pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: The optical part of the three-loop intraocular lens body (3) is designed as a biconvex aspherical surface with a refractive power range of 0.5D to 36.0D.

6. The pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens according to claim 5, characterized in that: When the refractive power ranges from 0.5D to 30.0D, increments of 0.5D are made; when the refractive power ranges from 30.0D to 36.0D, increments of 1.0D are made.

7. The pre-installed three-loop scleral suture-fixed posterior chamber intraocular lens according to claim 1, characterized in that: The total diameter of the three-loop intraocular lens body (3) is 11.0 mm to 14.5 mm, and the three-loop intraocular lens body (3) includes a foolproof design loop (3.1), a loop 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 loop angle (3.3) is 5° to 10°, and the loop width is ≥0.28 mm.

8. The pre-installed three-loop 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-loop intraocular lens body (3), which can be injected into the injection channel (9.1) and loading area (9.3).

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