RU2286751C1 - Pincers for bending and implanting intraocular lenses - Google Patents

Abstract

FIELD: medicine; ophthalmology.

SUBSTANCE: pincers can be used at fuci-emulsification. Pincers for bending and implanting intraocular lenses has branches with working jaws. Branches are bent along ribs. Working jaws have surfaces for optical part of lens, which are made concave and they have bevels. Bevels are disposed at angle of 2-6° to plane of joint of jaws. Minimal gap between bevels is disposed at external side of bed of working jaws. Minimal length of chord of any concave surface intended for optical part of lens exceeds diameter of optical part of lens by at least 0,2 mm. Minimal sag of any concave surface intended for optical part of lens exceeds average thickness of cross-section of optical part of lens by at least 0,1 mm. Working jaws of pincers interact with flexible (folding) intraocular lenses in optimal manner. Operations can be made through short cut.

EFFECT: reduced traumatism of implantation; comfort at use.

3 cl, 4 dwg

Description

The invention relates to surgical instruments and can be used in ophthalmology for phacoemulsification.

Traditional phacoimulsification using a small incision requires a logical end through this incision; when implanting solid intraocular lenses with a haptic diameter of 5.5-6.7 mm, this completion is impossible, flexible (folding) intraocular lenses are required.

In turn, specialized tools are needed to work with flexible (folding) intraocular lenses, as capture tools used for implantation of hard lenses, as a rule, are not adapted to interact with the soft material of the optical part of the flexible lens and to bend it (see, for example, RU 23379 U1, 06/20/2002).

Closer to this invention is tweezers for bending intraocular lenses according to RU 2210344 C2, 08.20.2003, containing jaws with working jaws having surfaces under the optical part of the lens.

This tweezers greatly simplifies the preparation of flexible intraocular lenses for implantation, but when installing such a lens in a small incision, it is not effective since its branches should diverge over a considerable distance, which should be sufficient for the optical part of the lens to exit from the grooves on the working jaws.

The present invention is directed to solving the problem of creating a specialized tool for bending and installing flexible (folding) intraocular lenses through a small incision during phacoemulsification.

The technical result of the invention is the optimal interaction of the working jaws of the tweezers with flexible (folding) intraocular lenses, reducing the trauma of lens implantation through a small incision and ease of use.

The invention is expressed in the combination of essential features, in which tweezers for bending and implantation of intraocular lenses, containing jaws with working jaws having surfaces under the optical part of the lens, differs from the closest analogue in that its working jaws are curved along the edge, while the surfaces under the optical part the lenses are concave and have bevels located at an angle of 2-6 ° to the plane of closure of the working jaws, the minimum clearance between the bevels is located on the inside of the bend of the working jaws, and the maxim The clearance between the bevels is located on the outside of the bend of the working jaws, and the minimum chord length of each concave surface under the optical part of the lens is at least 0.2 mm larger than the diameter of the optical part of the lens, and the minimum deflection arrow of each concave surface under the optical part of the lens is not less than 0.1 mm exceeds the average thickness of the cross section of the optical part of the lens.

The above set of essential features is sufficient to achieve the technical result of the invention in all cases to which the requested amount of legal protection applies.

In special cases of its implementation or use, tweezers for bending and installing intraocular lenses may contain working jaws that are bent at an angle of 150 °, and branches that have finger surfaces made with corrugations.

The invention is illustrated by drawings, where figure 1 shows a General view of the tweezers for bending and implantation of intraocular lenses with open working jaws, figure 2 is shown shown in figure 1, the view of the working jaws in the closed position (view A), figure 3 - section BB of the working jaws in the closed position and in Fig. 4 - tweezers working jaws superimposed on the optical part of the intraocular lens.

The tweezers for bending and implantation of intraocular lenses contain jaws 1 and 2 with working jaws 3 and 4 curved along the edge. Working jaws 3 and 4 have concave surfaces 5 and 6 under the optical part of the lens. Concave surfaces 5 and 6 for the optical part of the lens are made with bevels 7 and 8 located at an angle of 2-6 ° to the closing plane of branches 1 and 2. The minimum clearance between bevels 7 and 8 is located on the inside of the bend of the working jaws 3 and 4. Maximum the gap between the bevels is located on the outside of the bend of the working jaws 3 and 4. The minimum chord length of the concave surface 5 or concave surface 6 under the optical part 9 of the lens is at least 0.2 mm larger than the diameter of the optical part 9 of the lens. The minimum deflection arrow of the concave surface 5 or concave surface 6 under the optical part 9 of the lens is not less than 0.1 mm greater than the average thickness of the cross section of the optical part 9 of the lens.

The working jaws 3 and 4 can be bent at an angle of 150 °, and the jaws 1 and 2 can have finger surfaces made with corrugations 11.

During the operation, the optical part 9 of the intraocular lens is placed between the working jaws 3 and 4 of the tweezers and folds due to the dosed pressure of the surgeon's fingers on the jaws 1 and 2. The location of the fingers on the corrugated surfaces 11 allows you to conveniently fix the jaws 1 and 2 in the selected position and prevent even a slight tweezers bias. When folding the intraocular lens, the ratio of the sizes of its optical part 9 and the sizes of the concave surfaces 5 and 6 of the working jaws 3 and 4 ensures optimal contact between the optical part 9 and the concave surfaces 5 and 6, eliminating lens damage.

The implementation of the bevels 7 and 8 of the concave surfaces 5 and 6, which is characterized in that the minimum clearance between the bevels 7 and 8 is located on the inside of the bend of the working jaws 3 and 4, and the maximum clearance between the bevels 7 and 8 is located on the outside of the bend of the working jaws 3 and 4, facilitates the orientation of the intraocular lens and visual control of its positioning under the capsulorexis.

At the time of positioning, the surgeon relaxes the pressure on the branches 1 and 2 and the optical part 9 of the lens opens. Since the optical part 8 of the lens is soft and elastic, it seems to “get stuck” for fractions of a second between the concave surfaces of 5 and 6 of the working jaws 3 and 4, while the bevels 7 and 8 of the concave surfaces 5 and 6, which are located at an angle of 2-6 ° to each other, make possible a smooth exit of the optical part 9 of the lens from the working jaws 3 and 4 and its fixation in the section using the haptic part 10.

Claims (3)

1. Tweezers for bending and implanting intraocular lenses containing jaws with working jaws having surfaces under the optical part of the lens, characterized in that its branches are curved along the edge, while the surfaces under the optical part of the lens are made concave and have bevels located at an angle of 2 -6 ° to the plane of closure of the working jaws, the minimum clearance between the bevels is located on the inside of the bend of the working jaws, and the maximum clearance between the bevels is located on the outside of the bend of the working jaws, and the minimum length of the choir Each concave surface under the optical part of the lens is at least 0.2 mm larger than the diameter of the optical part of the lens, and the minimum deflection arrow of each concave surface under the optical part of the lens is at least 0.1 mm greater than the average cross-sectional thickness of the optical part of the lens . 2. The tweezers according to claim 1, characterized in that it contains jaws that are bent at an angle of 150 °. 3. The tweezers according to claim 1, characterized in that the branches have finger surfaces made with corrugations.

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