RU2093124C1 - Device to mark cornea at making corneal cuts - Google Patents

Abstract

FIELD: medicine, medicinal equipment, ophthalmosurgery. SUBSTANCE: device consists of supporting element with a concave working surface the curvature of which corresponds to that of a cornea, and a holder. Supporting element has a groove designed to the limit that shows central optic area of an eye. While using this device it is necessary to conduct a dosed corneal cutting due to knife's support into stopping unit during cutting process. EFFECT: higher safety of central optic area of an eye. 3 dwg

Description

 The invention relates to medical equipment, in particular to ophthalmic instruments used in surgical operations when performing incisions on the cornea of the eye.

 A device for marking the cornea of the eye when applying cuts on it (ed. St. N 1335282, class A 61 F 9/007, 1987), containing a support element with a concave working surface with a curvature corresponding to the curvature of the cornea, with the center open the edge of the groove, the length of which is more than half of the support element and made up to the border defining the Central optical zone of the eye, and the holder, tilted outward from the vertical axis of the support element.

 A disadvantage of this known device is the danger arising from its use when cutting through the central optical zone of the eye when performing an incision on the cornea, which can subsequently lead to decreased vision due to clouding of the cornea and the appearance of astigmatism. This is due to the fact that the knife, having a direction from the periphery of the cornea to the center, does not have restrictions on its movement during each incision.

 The risk of such cutting through depends directly on the surgeon performing this operation, his professional preparedness, skills to accurately stop the cutting process at the right time before cutting through the central optical zone of the eye, as well as patient behavior, for example, eye movement when the knife is at the extreme point at the center .

 The present invention solves the problem of high-quality performance of radial incisions on the cornea of the eye, respectively minimizing the risk of possible complications and at the same time facilitating the work of the surgeon, simplifying the process of performing the operation in terms of obtaining precisely metered, even sections.

 The resulting technical result consists in the fact that the proposed device, when used, ensures the safety of the central optical zone of the eye. This is ensured by the device itself and does not directly depend on the experience and emotional mood of the surgeon performing this operation, as well as the patient undergoing this operation. Accordingly, it is simplified in the process of performing the operation, the time of its carrying out is reduced, and the obtained technical result becomes more predictable by increasing the accuracy of the dosage of the cuts.

 The specified technical result consists in the fact that in the device for marking the cornea of the eye when applying cuts on it, containing a support element with a concave working surface with a curvature corresponding to the curvature of the cornea, provided with a center with a groove open from the edge, a limiter and a holder deflected outward from the vertical axis of the support element, the limiter is installed in the groove of the support element, the length of which is more than half the length of the support element and is made up to the border defining the central optical zone of the eye, on The limiter is located.

 In FIG. 1 shows the proposed device, side view; in FIG. 2 top view; in FIG. 3 in axonometric view.

 A device for marking the cornea of the eye when applying cuts on it contains a support element 1 and a holder 2.

 The supporting element 1 is provided with a concave working surface 3 with a curvature corresponding to the curvature of the cornea. In the center, the support element 1 is provided with a groove 4 open with an edge, the length of which is more than half of the support element 1 and is made up to the border defining the central optical zone of the eye. The support element 1 is equipped with a stop 5 located in the groove 4 at the border defining the Central optical zone of the eye. The holder 2 is deflected outward from the vertical axis of the support element 1 and serves to hold the device when performing an incision on the cornea of the eye. Depending on the parameters of the eye of each individual patient, three averaged diameters of the central optical zone of the eye are determined: 3.2; 3.5 and 5 mm. The proposed device assumes the availability of a set of devices structurally identical, but different in size, the length of the groove and the installation of the organizer at the border, which determines the Central optical zone of the eye. Each of this set of devices corresponds to the accepted value of the diameter of the Central optical zone: 3.2; 3.5 and 5 mm.

 The device is used as follows.

 After carrying out anesthesia and marking the cornea according to the usual method, the surgeon, holding the device with the holder 2 with one hand, sets its supporting element 1 on the limb region so that its concave working surface is placed on the cornea. In this case, the device on the cornea is placed until the groove coincides with one of the marking beams, and the outer edge of the limiter 5 with the boundary of the central optical zone. After that, the surgeon, holding the knife in the other hand, performs a stab of the knife into the periphery of the cornea and begins to cut the cornea towards the center. The knife slides along the groove 4 of the support element 1 of the device, which eliminates the deviation of the knife to the side. When reaching the limiter 5, the knife abuts against it and is brought up from the cut.

 The device is mounted on another marking beam, similar to that described above, and the next incision is made on the cornea. Repositioning the device on the cornea and performing incisions is performed until the operation is completed.

 The choice of a device for performing an operation for a particular patient is made from a set of devices according to the parameter of the central optical zone of the eye, which is determined individually for each patient using the technology of MNTK "Eye Microsurgery".

Claims (1)

 A device for marking the cornea of the eye when applying cuts on it, containing a support element with a concave working surface with a curvature corresponding to the curvature of the cornea, provided with a central groove open at the edge, a stopper and a holder deflected outward from the vertical axis of the support member, characterized in that the stopper installed in the groove of the support element, the length of which is more than half the length of the support element and is made to the border that defines the Central optical zone of the eye, on which the stop is placed.

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