RU211219U1 - Intraocular lens Aquamarine TT - Google Patents

Abstract

The utility model relates to medicine, namely to ophthalmology, and can be used in cataract phacoemulsification (PEK), as well as in extra/intracapsular cataract extraction (EEK, IEK) for intraocular correction of aphakia. The technical result of the utility model is the convenience of subsequent extra-capsular fixation of the IOL both in the long-term period and in cases of preventive fixation. Intraocular lens (IOL), consisting of a round optical part with a diameter of 6 mm and two pairs of closed haptic elements located diametrically opposite to the optical part, while each haptic element consists of two arcuate parts - large and small, adjacent to the optical part, and the IOL is made of hydrophilic acrylic, the total diameter of the IOL is 11 mm, characterized in that at the junctions of each pair of haptic elements with the optical part, three fenestration holes are made - 0.5 mm. 4 ill.

Description

The utility model relates to medicine, namely to ophthalmology, and can be used in cataract phacoemulsification (PEK), as well as in extra/intracapsular cataract extraction (EEK, IEK) for intraocular correction of aphakia.

The current stage of development of ophthalmosurgery provides for a considerable number of different soft IOL models, which differ from each other by the convenience of implantation for the surgeon in various clinical situations.

So, for example, for classical endocapsular implantation, the S-type design has become the most common. However, in some cases, especially when it comes to secondary IOL implantation in the absence of capsule support, most surgeons prefer models with a four-support design. The choice of such IOLs is small, and they are all approximately identical, having the same advantages and disadvantages.

Most known models of four-bearing IOLs are not adapted for extracapsular fixation. Over time, surgeons have developed an understanding of how the existing four-bearing models can be adapted for scleral fixation, however, there are a number of issues that have not been resolved.

Based on the experience of working with IOLs that have fenestration holes at the junction of the haptic and optical parts (Baush&LombEnVistaMX60), which can be used to insert a thread into them with the subsequent formation of a loop, knot or flange, which perform the functions of fixing the suture material to the IOL, we know that the proximal localization of the place of attachment of the suture material to the IOL shows better results in the postoperative period than the distal one. But four-bearing IOLs with fenestrations have not been registered in the Russian Federation.

Another solution to the absence of additional small fenestration holes is the puncture of the IOL with thin needles, which also raises questions about long-term results, because the violation of the integrity of the IOL cannot be predicted by changing the properties of its material and does not guarantee the preservation of its transparency.

The closest analogue of the claimed utility model is an intraocular lens (IOL), consisting of a round optical part with a diameter of 6 mm and two pairs of closed haptic elements located diametrically opposite to the optical part, with each haptic element consisting of two arcuate parts - large and small, adjacent to the optical part, and the IOL is made of hydrophilic acrylic, the total diameter of the IOL is 11 mm (AKreos AO-Baush&Lomb (USA), https://belikova.ru/patients/vopros_answer/iskusstvennye_khrustaliki/akreos_ao_baush_lomb_ssha_/, published on 04/21/2021.

The main disadvantage of this analogue is that by leading the sutures behind the haptic elements, we obtain the most distal attachment points, and given the wide holes in the haptic elements, this articulation is not considered predictable and reliable: the knots untie or slide off, which ultimately can give an asymmetric fixation with a deterioration in the functional outcome and a decrease in the quality of life, which will ultimately require repeated surgical interventions.

The technical result of the utility model is to optimize the design of a four-support IOL with adaptation to the convenience of subsequent extracapsular fixation both in the long-term period and in cases of preventive fixation.

This technical result is achieved by the fact that the intraocular lens (IOL), consisting of a round optical part with a diameter of 6 mm and two pairs of closed haptic elements located diametrically opposite to the optical part, with each haptic element consisting of two arcuate parts - large and small, adjacent to the optical part, and the IOL is made of hydrophilic acrylic, the total diameter of the IOL is 11 mm, according to the utility model, at the junctions of each pair of haptic elements with the optical part, three fenestration holes are made - 0.5 mm. The utility model is illustrated by drawings, where:

figure 1 shows an intraocular lens;

figure 2 shows possible options for fastening the thread;

figure 3 shows additional points of support when attaching the thread;

figure 4 shows the pupil.

List of positions: 1 - intraocular lens (IOL), 2 - optical part, 3 - fenestration holes, 4 - reverse angle 360° equal to 45°, 5 - fulcrum, 6 - contact area.

In FIG. 1 shows a hydrophilic, elastic intraocular lens (1) with a four-support design, containing an optical part (2) with a diameter of 6 mm and 4 haptic elements. The total diameter of the IOL is 11 mm. At the junction of the haptic and optical parts (2) there are 6 fenestration holes (3) of 0.5 mm each, which creates convenience for inserting a thread into it with the subsequent formation of a knot, loop or counterstop. This solution is universal and can satisfy the needs of both those who are used to fixing the thread at the base of the haptic element, and those who prefer distal localization of holes. If necessary, it is possible to combine several points of fixation of the suture material, which ultimately will have a positive effect on the reliability of fastening, which is shown in Fig. 2.

The additional fenestrations provide the additional benefit of increasing the holding contact area (6) due to additional support points (5), as seen in FIG. 3.

A more proximal location of the fenestrations will facilitate manipulation when working with a narrow pupil (Fig. 4), which often happens in cases of complex reposition in the long term, because a narrow pupil and ligament lysis are the result of the same pathological process - pseudoexfoliative syndrome.

The presence of fenestration holes (3) is an additional convenience in complicated cases, without limiting the convenience of classical endocapsular implantation, without resorting to extracapsular fixation.

The IOL is used in the classical way by delivery by the implantation system intraocularly through a corneal tunnel incision of 2.2-2.4 mm. In the long-term period, if dislocation of the entire IOL or the entire complex (IOL + bag) occurs, the presence of fenestrations that do not affect visual functions will not only greatly simplify the work of the surgeon in repositioning the complex due to the convenience of threading a loop of thread into them with subsequent tying, but also protect against the desire to perform a puncture in those places that are not intended for this by the instruction manual. Convenience in performing manipulations for the surgeon will ultimately significantly reduce the intervention time itself, which will reduce the overall surgical trauma and accelerate the processes of early rehabilitation in the postoperative period. Reducing hydrotrauma of the corneal endothelium, by reducing the total time of the operation, will reduce the risk of such complications as postoperative endothelial-epithelial corneal dystrophy, which is a natural consequence of long-term surgery, which will expand the indications for extracapsular IOL fixation in cases where the initial density of endothelial cells was not high .

Thus, it can be concluded that the creation of this IOL model will not only become a more convenient and universal solution for all ophthalmic surgeons, but will also reduce the total number of surgical complications during subsequent IOL reposition, reducing the rehabilitation period to a minimum.

Claims (1)

Intraocular lens (IOL), consisting of a round optical part with a diameter of 6 mm and two pairs of closed haptic elements located diametrically opposite to the optical part, while each haptic element consists of two arcuate parts - large and small, adjacent to the optical part, and the IOL is made of hydrophilic acrylic, the total diameter of the IOL is 11 mm, characterized in that at the junctions of each pair of haptic elements with the optical part, three fenestration holes are made - 0.5 mm.

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