SU1503802A1 - Method of treatment of keratoconus - Google Patents

Abstract

This invention relates to the treatment of keratoconus. To reduce postoperative complications, the cornea of the recipient is exfoliated through a small incision in the middle layers throughout its length. The implant disc, excised from the donor cornea, is placed in a pocket between the layers of the cornea’s stroma to thicken it without fixation with sutures and is held by the layers of the cornea of the recipient. In addition to strengthening the thinned cornea, the implant performs an optical function.

Description

This invention relates to medicine, in particular, to methods of corneal transplantation in the treatment of keratocous.

The purpose of the invention is to reduce noso-operative complications and eliminate irregular astigmatism.

The method is carried out as follows.

The cornea of the recipient is exfoliated through a small incision in the middle layers but its entire extent. The implant disc excised from the donor cornea is placed in a pocket between the layers of the corneal stroma to thicken it without fixation with sutures and is held by the layers of the cornea of the cornea.

Example 1. In the treatment of keratoconus, keratoplasty is performed under local anesthesia: instillation with 1% solution of dicain, akinesia with a 2% solution of novocaine. In the upper part of the cornea of the recipient, the distance from the limb is 1.0-1.5 mm, an incision is made in the surface layers of the cornea both / points 5 mm long to a depth of 0.3 mm. At the depth of the incision, a special corneal knife with a bend, close to the curvature of the cornea, rocking-translational Mi i movements -; poroBinta exfoliates to form inters. 1 | 1c) 1 in a pocket with a diameter of 9-10 mm.

The implant is prepared from donor poi o-vitamins, preserved according to the method of V. P. Filatov in a moist chamber at 2-4. () C for 1-2 days. The eye of the donor is processed in 2 portions of an aqueous solution of bri-1-litaitic green (1: 2000) and 30% aqueous solution of sulfacyl sodium. Scarn ((The enithelium is carefully removed from the bone by the catcher. The cornea is stratified; - eating at a depth of 0.4 mm, 1 millimeter with a diameter of 7 mm is cut out at a depth of 0.4 mm, and when the recipient is thinning, the diameter of an implant , 1 diameter of 8- -9 mm.

Imp 1t is treated in an aqueous solution of brilliant green (1: 2000), as a result of which it produces a bluish color, which means; It facilitates its installation in the corneal pocket. With the help of microintus and spatula, curved but the curvature of the cornea, imn, iomeyayut in thinned with. Yi cornea reni.chienta. 1Pvs do not overlap. The implant is retained by the corneal layers, being in beneficial

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us; 1C xi for engraftment. Monocular position. Patient free mode. The edema () 1111 and the surrounding layers of the cornea passes through a month, visual acuity increases, the cornea thickens, and its clouding decreases.

Thus, the method of surgical treatment of keratoconus is simple to perform, eliminates the use of sutures traumatic for the transplant and cornea of the recipient, reduces the number of operative and postoperative complications, strengthens and thickens the weakened layers of keratoconus, expands the possibility of keratoplasty for the treatment of keratoconus in earlier stages disease. In addition to strengthening the thinned cornea, the implant also performs an optical function. This property is manifested in the fact that an implant placed in the layers of the cornea evenly distributes the cornea due to its elasticity and mass, and this leads to the elimination of irregular astigmatism, as a result of which the visual acuity is significantly reduced.

Example 2. Patient A., 21 years old, with kerato-cone HI of the gland of the left eye. The last three years, notes a constant decrease in visual acuity, contact lenses can not tolerate. During examination: the cone-shaped cornea is thinned in the central region

0

five

no, folds of decimetric shell. Visual acuity of 0.06 is not corrected. Ophthalmometer: abnormal astigmatism. The operation was performed on the left eye: through the incision of the cornea in refer 1 and stratification of the scapes in the middle layers was performed. An implant of a donor cornea with a diameter of 7 mm and a thickness of 0.4 mm was placed in the layers. Stitches are not imposed. When examining a patient after 12 months: the cornea and implant are transparent. Visual acuity of 0.1 with a sphere of 3.0 diopters 0.4. The acuity of sight is close at a distance of 15 cm 1.0. Ophthalmometer: there is no abnormal astigmatism, the radius of curvature of the cornea along the horizontal meridian is 6.8 mm along the vertical 7.2 mm. Thus, the proposed method allows the cornea to be flattened, stabilizes the development of keratoconus, and significantly improves the visual acuity.

Claims (1)

Invention Formula A method of treating keratoconus by cornea transplantation, characterized in that, in order to reduce postoperative complications and eliminate irregular astigmatism, intralamellar corneal allotransplantation is performed.