RU122290U1 - IN-CAPSULE RING - Google Patents

Abstract

1. An intracapsular ring, which is an open ring made of an elastic polymeric biocompatible material, the outer diameter of which is proportional to the inner diameter of the capsule bag, with a radial bend made in the middle of the ring, directed inside the ring and located in the plane of the ring, having technological holes at the ends of the ring, which differ in that the free ends of the ring are made in the form of arcs diametrically located and facing inside the ring. 2. The intracapsular ring according to claim 1, characterized in that the radial bend is made with a radius of 0.8-2.0 mm.

Description

The utility model relates to medicine, and more specifically to ophthalmic surgery, and can be used in cataract extraction in patients with pseudoexfoliation syndrome.

In recent years, during cataract extraction in patients with pseudo-exfoliative syndrome, various models of devices for expanding the capsular bag (intracapsular ring) that prevent wrinkling of the capsule bag of the lens in the long-term after surgery are used to expand and maintain the capsular bag and implant an intraocular lens (IOL) in it, providing stabilization of the capsular bag, tension of the posterior capsule and reducing the risk of secondary cataracts.

Known intracapsular ring for implantation of an artificial lens of the eye, made in the form of an open oval with closed loops at the ends. The material used is polymethylmethacrylate or titanium (patent 9157 U1, op. 16.02.1999). However, this device does not have sufficient stability of fixation in the eye.

Known intracapsular ring, made in the form of an open ring with closed loops at the ends, characterized in that it is made of polypropylene thread, and a hinge of the first kind is made diametrically to break the ring (patent 14505 U1, op. 10.08.2000).

Known intracapsular ring, made in the form of a curved figure with loops at the ends, one of which is designed to be attached to the sclera, characterized in that it is made in the form of an open ring, one end of which smoothly passes into the arch, bent inward of the ring and lying in the plane, located at an acute angle to the plane of the ring (patent RU 22872 U1, op. 10.05.2002).

The disadvantage of this device is its functional limitation, i.e. the possibility of only one-sided fixation of the capsular bag to the sclera with unilateral loss of ligamentous support. In addition, when inserted into the capsule bag, the ring passes asymmetrically along the entire length of the equator, which can lead to additional damage to the ligamentous apparatus or lens capsule.

The closest analogue to the claimed intracapsular ring - the prototype, is the intracapsular ring, which is an open ring with rounded ends and holes in them, made of an elastic polymer material, mainly oligocarbonate methacrylate, while the outer diameter of the ring is proportional to the inner diameter of the capsule bag, and in the middle radial bending with a radius of 0.7-1.4 mm, directed inside the ring and located in the plane of the ring (patent RU 55585 U1, op. 27.08.2006).

The disadvantages of the known intracapsular ring are its limited functionality, because This device cannot be used to fix the capsule bag to the sclera.

The objective of the proposed utility model is the development of a new, more advanced design of the intracapsular ring, which allows atraumatic implantation of the ring into the capsule bag using an injector.

EFFECT: increased stability of the intracapsular ring in the capsular bag, the possibility of scleral fixation in case of critical failure of the ligamentous apparatus, the exclusion of intra- and postoperative complications.

The specified technical result is achieved by the proposed intracapsular ring, consisting of the following structural elements.

The design of the utility model is illustrated by the following figures.

On Fig 1 presents a General view of the ring in open form (before being placed in the injector).

On Fig 2 presents a view of the ring in the working position (inside the capsule bag).

On Fig 3 presents a view of the ring in stages when you enter it into the injector.

The inventive intracapsular ring is an open ring (1), on the free ends of which are made diametrically located and facing inwardly the ring of the temple (2) with holes at their ends (3), made of an elastic polymer biocompatible material having an outer diameter commensurate with the inner diameter of the capsule bag, with the middle of the ring has a radial bend (4) with a radius of 0.8-2.0 mm, directed inside the ring and located in the plane of the ring. The cross section of the ring can be round or rectangular. As the biocompatible material, any available resilient polymeric material can be used, in particular polymethyl methacrylate, polyurethane methacrylate, polypropylene, oligocarbonate methacrylate.

The ring is used as follows. On a lens with inconsistency of the ligamentous apparatus after continuous circular capsulorexis, hydrodissection of the cortical layers, before or after removal of the nucleus, the ring is inserted into the capsule bag using an injector through a tunnel incision of 2.0 mm or more. The intracapsular ring in the working position is one and a half turns of a flat spiral.

The ring is implanted into the capsule bag using an injector, the hook of which hooks into the radial bend (4) in the middle of the ring. Then, under the action of the spring mechanism, the ring is pulled into the injector, after which it takes the form of an elongated loop. The ring is inserted into the capsule vault, opposite the tunnel section, while both halves of the ring exit the injector symmetrically and synchronously, describing three quarters of the circle each, and occupy the working position. The arches (2) at the ends of the ring, if necessary, can be moved to the outer surface of the anterior capsule and used to suturely fix the capsule bag to the sclera or iris

The defining difference of the claimed intracapsular ring, in comparison with the prototype, is that the former has diametrically located and inwardly facing the temple arches (2) at its free ends, which makes it possible to increase the stability of the ring in the capsular bag and fix the capsular bag to the sclera at two diametrically opposite points .

The utility model is illustrated by the following examples of specific use.

Example 1

Patient M. was admitted to the Novosibirsk branch of the Eye Microsurgery IRTC with a diagnosis of Complicated incomplete cataract of the right eye, pseudoexfoliation syndrome, lens subluxation of the first degree. On examination, the anterior chamber is deep, atrophy of the pigment border and iris stroma, deposition of pseudo-exfoliative material along the pupil edge and on the anterior capsule of the lens, iridodonesa, phacodonesis, cortical layers translucent, brownish-tinted core, visual acuity 0.05.

1% mesatone, viscoelastic, was introduced into the anterior chamber through paracentesis. A 2.2 mm tunnel was made, a continuous circular capsulorexis. After three additional paracentesis, three single-use polymer retractor hooks were introduced and inserted beyond the edges of the anterior capsulorexis. After hydrodissection, ultrasonic removal of the nucleus and leaching of most of the lens masses with the help of an injector, the inventive intracapsular ring of rectangular polymethylmethacrylate (radius of radial bending is 0.8 mm) is introduced through capsulorexis under the front capsule on the opposite side of the section. The removal of the remaining lens masses has been carried out. Polishing the back capsule, IOL implanted in the capsule bag. The arches of the ring are removed from the capsular bag and placed on the front lens capsule. With the help of a long needle with polypropylene thread, the arches through technological holes are fixed through a ciliary groove to the sclera. Viscoelastic removed, operation completed. At discharge, visual acuity of 0.8, the position of the IOL is stable, there is no pseudo-facodonezone.

Example 2

Patient V., admitted with DS: Complicated complete cataract of the left eye, pseudoexfoliation syndrome, subluxation of the lens of the 1st degree, OAG IIA of the left eye. On examination: the anterior chamber is unevenly deep, iridodoneson, phacodonesis, pupil 3 mm, diffuse opacification of all layers of the lens, visual acuity of 0.01.

A 1% mesatone, viscoelastic, was inserted into the anterior chamber, a 2.2 mm tunnel was made, anterior capsulorhexis, hydrodissection, and cortical masses were removed. A ring of polymethylmethacrylate of circular cross section was introduced under the front capsule using an injector (the radius of radial bending is 2.0 mm). Performed ultrasonic removal of the nucleus, aspiration of the lens masses. The IOL was implanted in a bag that was stable throughout the operation. The arches of the ring are brought out under the iris and the polypropylene thread is fixed to the sclera at 3 and 9 o’clock. Viscoelastic removed, operation completed without complications. At discharge, visual acuity of 0.5. The position of the bag and the IOL is stable.

The proposed intracapsular ring can be used for expansion and stabilization of the capsular bag, as well as for its fixation with significant defects of the zinc ligaments at the final stages of cataract phacoemulsification or in the remote postoperative period when the capsule bag-IOL complex is dislocated.

Claims (2)

1. Intra-capsule ring, which is an open ring made of an elastic polymer biocompatible material, the outer diameter of which is commensurate with the inner diameter of the capsule bag, with a radial bend made in the middle of the ring, directed inside the ring and located in the plane of the ring, having technological holes at the ends of the ring, different the fact that the free ends of the ring are made in the form of arches diametrically located and facing inward of the ring. 2. The intra-capsule ring according to claim 1, characterized in that the radial bending is made with a radius of 0.8-2.0 mm