RU53144U1 - TOOL FOR REMOVING FOREIGN BODIES FROM THE EYE CORNAL SURFACE - Google Patents

Abstract

A tool for removing foreign bodies from the surface of the cornea of the eye refers to tools used in medicine, in particular in ophthalmology, and can be used to perform microsurgical operations to remove foreign bodies from the surface of the cornea of the eye in the conditions of ophthalmic clinics. A tool for removing foreign bodies from the surface of the cornea of the eye, includes a working part in the form of a needle of a triangular shape with a piercing end and a handle of a cylindrical shape with a ribbed surface, and the needle 12-13 mm long has a rounded shape 1 / 4-3 / 8 of a circle length with a radius circles 4.75-5.9mm, and the tip and cutting lateral sides of the needle have microsurgical acuity. The use of a microsurgical instrument allows to reduce the invasiveness of interventions due to the extremely small size and maximum sharpness of the stitching and cutting working surfaces of the instrument and reduces the time spent on the sick leave by half.

Description

A tool for removing foreign bodies from the surface of the cornea of the eye refers to tools used in medicine, in particular in ophthalmology, and can be used to perform microsurgical operations to remove foreign bodies from the surface of the cornea of the eye in the conditions of ophthalmic clinics.

Known Schotter tool for removing foreign bodies and their residues from the cornea, consisting of a handle and a working part made in the form of a pointed spatula with blunt side faces, the size of the working part is 0.5-1 mm. (one)

However, the large size of the working part of the tool does not allow to control manipulations under a microscope or a slit lamp, covering the surgical field. In addition, since this tool is not microsurgical, it allows you to remove foreign bodies, tearing them out of the cornea of the eye, thereby causing additional injury to the eye.

The closest in design to the claimed tool is a needle for removing foreign bodies, consisting of a handle with a ribbed surface and a working part in the form of a needle of a triangular shape with blunt side faces. (2), taken as a prototype.

However, since this tool is not microsurgical, the size of the tip of the working part of the tool exceeds the size of the removed foreign body, and the tool covers the surgical field, blunt side faces allow you to work only with the tip of the tool, tearing the tissue of the eye, which increases the invasiveness of the operation, leading to decreased or loss of vision, increases the duration of treatment.

The technical problem solved by the proposed design of a tool for removing foreign bodies from the surface of the cornea is to reduce the morbidity of the operation and reduce the treatment time as a result of the operation using microsurgical technologies.

The creation of a microsurgical instrument for carrying out these operations is due to the following reasons: 1) foreign bodies enter the cornea of the eye by

their frequency occupy first place among non-penetrating wounds of the anterior segment of the eye; 2) the thickness of the cornea of the eye varies from 1 mm on the periphery to 0.3 mm in the center, so an appropriate tool is required to work in such a thin structure.

The proposed microsurgical instrument consists of a handle with a cylindrical shape with a ribbed surface and a working part in the form of a needle of a triangular shape, and the needle 12-13 mm long has a rounded shape with 1 / 4-3 / 8 circumference with a circle radius of 4.75-5.9 mm, and the side the edges of the needle are cutting.

Distinctive features of the tool are: the needle 12-13 mm long has a rounded shape 1 / 4-3 / 8 of the circumference with a circle radius of 4.75-5.9 mm, and the side edges of the needle are cutting.

The cutting side faces of the working part of the tool allow you to use them as a cutting tool when performing manipulations.

The curved shape of the working part of the tool allows you to approach the removed foreign body at an angle and not close the surgical field with either your hand or the handle of the tool. At the same time, with a circumference of less than 1/4, the working part of the tool will be almost straight and will cover the surgical field during manipulations. With a circumference of more than 3/8, the bend of the working part will be too steep, which will force the doctor to lower his hand low, which creates difficulties during manipulation.

If the radius of the circle is less than 4.75 mm, then with such a bend of the needle, making an incision under a foreign body will be difficult. If the radius of the circle is more than 5.9 mm, the incision above the foreign body will be difficult because the surgical field will be covered by the surgeon’s hand.

The tool must have dimensions that make it suitable for use under a microscope, which determines the size of its working part. Moreover, if the size of the working part is more than 13 mm, then it can bend and break with a cutting force, and with sizes less than 12 mm, the tip of the holder will block the surgical field.

Figure 1 shows a tool for removing foreign bodies from the surface of the cornea of the eye, General view; figure 2 - the working part of the needle; figure 3 - technical parameters of the needle, where 1 is the radius of the circle, 2 is the length of the needle.

A tool for removing foreign bodies from the surface of the cornea of the eye (figure 1) consists of a needle 1, a holder 2 and a handle with a ribbed surface.

Microsurgical instrument can be used:

1) to remove a foreign body that caused infiltration and / or metallosis of the surrounding tissues from the surface of the cornea of the eye. In this case, under a microscope or

With a slit lamp, when the size and depth of the infiltrate or metallosis are clearly visible, a needle 1 is inserted into the edge of the affected area to the depth of the lesion. Then the cutting edge of the working part of the tool at the same depth makes a circular cut along the perimeter of the affected area. The cut out affected area is picked up by the instrument from below and due to the loose connection of this area with healthy tissues of the cornea, it is removed along with a foreign body embedded in it.

Cutting out a non-viable corneal site affected by infiltration and impregnated with metal ions and removing it together with a foreign body makes the wound uncomplicated and contributes to primary healing, significantly reducing treatment time.

2) to remove a foreign body from the surface of the cornea of the eye, not complicated by infiltration and metallosis. Since the tip of the microsurgical needle 1 is always several times smaller than the foreign body to be removed, under the microscope or slit lamp, you can displace the foreign body and remove it without touching the cornea tissue.

The inventive tool was successfully used in the ophthalmic department of the Republican hospital and in the polyclinics of Petrozavodsk, as well as in the eye trauma center of St. Petersburg when performing operations using microsurgical technologies. The clinical observations obtained allow us to conclude that the use of a microsurgical instrument can reduce the invasiveness of interventions due to the extremely small size and maximum sharpness of the stitching and cutting working surfaces of the instrument and halves the length of stay on the sick leave.

Claims (1)

A tool for removing foreign bodies from the surface of the cornea of the eye, comprising a working part in the form of a needle of a triangular shape with a piercing end and a handle of a cylindrical shape with a ribbed surface, characterized in that the needle 12-13 mm long has a rounded shape with 1 / 4-3 / 8 circumference with a radius of 4.75-5.9 mm, and the side edges of the needle are cutting.