RU-220208-U1 - MARKER OF THE ZONE OF IMPLANTATION OF CORNEAL SEGMENTS

Abstract

The utility model relates to the field of ophthalmic surgery and can be used to mark the center of the cornea and the implantation zone of corneal segments and rings. The marker for the implantation zone of corneal segments consists of a handle and a working part located at an angle to it in the form of three rings with diameters of 5 mm, 7 mm and 9 mm and eight segments located at the same distance from each other and passing through the center of the working part, two The segments are located perpendicular to the handle. The use of the utility model makes it possible to accurately mark the cornea, taking into account the cyclotorsion and diameters of all existing segments, marking the oblique and vertical axes, the optimal location of the segments after docking and the installation of corneal segments at a given diameter, which will allow obtaining the planned refractive effect after implantation of the segments, taking into account the anatomy of the cornea .

Inventors

• Копылов Андрей Евгеньевич
• Фабрикантов Олег Львович
• Дудаков Дмитрий Анатольевич

Dates

Publication Date

20230901

Application Date

20220804

Claims (1)

1. A marker for the implantation zone of corneal segments, consisting of a handle and a working part located at an angle to it in the form of three rings, characterized in that the diameters of the rings are 5 mm, 7 mm and 9 mm, and eight segments passing through the through the center of the working part, with two segments located perpendicular to the handle.

Description

The utility model relates to the field of ophthalmic surgery and can be used to mark the center of the cornea and the implantation zone of corneal segments and rings. Implantation of corneal segments is an effective method of stabilizing the progression of keratoconus, providing a stable refractive effect, the possibility of additional correction with contact lenses, a short rehabilitation period, and no restrictions in the usual lifestyle after surgery. Intrastromal corneal segments (ICS) are rounded implants made of medical polymer material with biocompatible properties. The diameter of the segments is about 4-6 mm, the height can vary between 150-350 microns. It is the height of the segment that determines how strong the refractive effect will be. The selection and calculation of IRS is carried out by the doctor individually according to the parameters of each specific patient, which allows obtaining the necessary results of visual correction. After installing biocompatible implants into the thickness of the cornea, they begin to put pressure on the membrane, giving it an anatomically correct shape, which has a positive effect on focusing and quality of vision. Implants eliminate a pathological cone or other irregularities in the corneal shape and thereby correct vision. Before the operation, it is necessary to mark the center of the cornea and the area of implantation of corneal segments and rings. A known marker for the center of the cornea and the implantation zone of corneal segments and rings (RU patent No. 2594448), containing a handle in the form of a tube with a piston and a coil spring and a working part consisting of a peripheral ring with two horizontally oriented protrusions diametrically located in the frontal plane, and a central part , movable in the sagittal plane in the form of segments intersecting at an angle of 90 degrees with three marks on each, pushed from the center at a distance of 2.5, 3.0 and 3.5 mm, respectively. However, during the manipulation process, there is a possibility of inaccurate alignment of the pre-made axis with the protrusions on the marking ring, which will not allow the axes to be correctly marked and the segment to be installed to the required diameter. As the closest analogue, we selected a central zone marker for excimer surgery produced by the Medin Ural company (https://medin-ural.ru/mikrokhirurgiya/otmetchiki/m598t.html), consisting of a handle and a working part in the form of three rings with diameters 3 mm, 5 mm and 7 mm and two segments located perpendicular to the handle and passing through the center of the working part, with the exception of the inner diameter of the smaller ring. The disadvantages of the prototype include the inability to mark oblique and vertical axes, rings relative to the diameter of the segment and relative to the segments used. The purpose of the utility model is to develop a device that allows precise marking of the implantation zone of corneal segments. The proposed utility model consists of a handle (1), see Fig. 1 and a working part located at an angle to it in the form of three rings (2-4) with diameters of 5 mm, 7 mm and 9 mm and eight segments (5-12), located at the same distance from each other and passing through the center of the working part , with two segments located perpendicular to the handle. The technical result from the use of the utility model is to provide the ability to accurately mark the cornea, taking into account the cyclotorsion and diameters of all existing segments, marking the oblique and vertical axes, the optimal location of the segments after docking and installing the corneal segments at a given diameter, which will allow obtaining the planned refractive effect after implantation of the segments , taking into account the anatomy of the cornea. The utility model works as follows. The implanted intrastromal segments are calculated using a special nomogram (Keraring Calculation Guidelines). The patient's visual axis is determined by marking the light reflex when fixing the patient's eye on the light source while simultaneously marking the strong meridian of the cornea. Mark the horizontal axis 0°-180°. To obtain an imprint, the marker is oriented by installing the working part along the limbus, comparing the previously marked horizontal axis with the corresponding segments of the marker, after which the implantation zone of the corresponding corneal segments is marked locally along the meridians around the circumference.