SU1093341A1 - Forceps - Google Patents

Abstract

Tweezers, made in the form of two rigidly connected spring-loaded f4jiv 4f:.;, .., .. VI | L mGEK4I branch with working parts in the form of needles bent toward each other, characterized in that, in order to avoid traumatization of eye tissues during extraction of the lens core, the working parts are bent at an angle of 30-35 & in the plane, perpendicular to the plane of the branch, and bent in the opposite direction in the plane of the branch, with the ends of the needles divorced relative to each other.

Description

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The invention relates to medical technology, namely ophthalmology. The tweezers, made in the form of two rigidly connected spring branches with working parts in the form of needles bent toward each other, are known. A disadvantage of the known tweezers is the possibility of traumatization of eye tissues during extraction of the lens core. The aim of the invention is the elimination of injury to the eye tissue during the extraction of the lens core. The goal is achieved by the fact that in tweezers, made in the form of two rigidly connected spring branches with working parts in the form of needles bent towards each other, the working parts are bent at an angle of 30-35 ° in a plane perpendicular to the plane of the branch and bent in opposite direction in the plane of the branch, with the ends of the needles divorced relative to each other. FIG. 1 shows the tweezers, general view; in fig. 2 - the same, top view. The tweezers consist of two elastic branches 1, which are connected to each other by a wide side in a support handle. Corrugated pressure surfaces are made on the outer side of the branch, approximately in the middle part, and bent needles 2 are made at free ends separated by a distance from the plane perpendicular to the plane of the tool's branch. The needles are bent in the form of half arcs in the plane of the branch 1. Half-arches are raised above the outer sides of the branch with size a, which may be 0.5-1.0 mm. The ends of the needles protrude above the inner sides of the branch at a size of 0.5–1.0 mm. On the length of the curved portion of the needles with, equal to 0.6-0.8 mm, the needles are bent upward from the plane of the branch at an angle x equal to 30-35 °. An angle of 30-35 ° ensures that the working lens of the instrument is led to the other lens in a plane parallel to the iris. A smaller or larger angle results in injury to the cornea, iris, its pupillary edge, ciliary body with parts of the instrument. In addition, a bend angle of 30–35 ° ensures that the core is removed in a plane parallel to the iris into the anterior chamber, and then from the eye, without touching the endothelium of the cornea with the core of the lens, which is unavoidable at other bend angles of the working tool ends. The arcuate parts bent in the opposite direction in the plane act not only as mirrors that push the pupillary edge of the iris in the equatorial region of the lens, but also act as a fixative of the core around the perimeter, thereby excluding rotational movements of the core during its extraction. The ends of the needles are located in a vertical plane with and shifted vertically with respect to each other by size d, which can be equal to 0.3-1.0 mm. The size and elevation of half arcs above the outer plane of the branch is determined from the condition of retraction by half arcs - "mirrors of the pupil edge of the iris to its root to provide a wide view of the equatorial zone of the lens, necessary for selecting the needle needle points. A half-articulation over the outer surface of the needles at length with allows the mirrors of the pupillary edge of the iris to be moved apart to its root to expose the equatorial zone of the lens. The protrusion of the ends of the needles above the inner plane of the needles to size 0 ensures a certain depth of insertion of the needles into the core of the lens. Shifting the ends of the needles relative to each other's size c ensures that the ends of the needles stick into different layers of the core, which prevents the lens from splitting when it is grasped with a tool and removed from the eye. Such a design of the tweezers allows: minimizing the traumatization of the surrounding tissues, since when it is used to remove the lens core, only traction forces are created, and not expression (extrusion) as with traditional lens removal methods; provide significant relief and speed up the removal of the core; reduce the labor intensity of the operation by eliminating the assistant; ensure reliable fixation of the lens core during its removal. This is achieved by the fact that the working parts of the tool are injected into the core in its equatorial zone at diametrically opposite points. In addition, the risk of dislocation of the lens core in the vitreous body is reduced due to its more reliable fixation and prevents stratification and fragmentation (fragmentation) of the lens core, which is achieved by cutting the working parts of the tool into cores in different planes. The size of the corneal incision is determined only by the size of the extracted lens core and twice the height of the working end of the branch. The size of the corneal incision, thus, is 1/3 smaller than when extracting the lens core by other known methods. The application of the proposed instrument provides not only significant relief and reduction of the time of surgical insertion, but also significantly reduces the possibility of operative and postoperative complications, which positively affects the course of the postoperative period. The time of hospital stay is reduced. A more thorough removal of the lens core and lens masses prevents the development of secondary cataracts.

Claims (1)

TWEEZERS, made in the form of two rigidly connected springy branches with working parts in the form of needles bent towards each other, characterized in that, in order to avoid injury to the eye tissue during extraction of the lens nucleus, the working parts are bent at an angle of 30–35 ° in a plane perpendicular , branches, and bent in the opposite direction in the plane of the branches, with the ends of the needles separated relative to each other. figure 1 SU, „. 1093341