RU192237U1 - INJECTOR FOR IMPLANTATION OF AN INTRAOCULAR LENS - Google Patents

Abstract

The invention relates to the field of medicine, namely to ophthalmosurgery, and is intended for delivery of an intraocular lens (IOL) into the cavity of the eye using an injector in the surgical treatment of cataracts. The utility model is aimed at developing an injector design for IOL implantation, which allows the controlled introduction of an injector tip into the cavity of the eye to the optimum depth for unhindered release of the IOL and occupation by the lens of the correct position in the capsule bag. The task is achieved by the development of a projector for implanting an IOL of the following design. An injector for implanting an IOL with a body section with a tip with an acute angle of cut and a piston. At a distance of not more than 2.5 mm from the longest portion of the distal edge of the injector tip, perpendicular to the injector body, there is a limiter for introducing the tip, which is an oval plate with a thickness of not more than 1 mm, the oval length refers to the diameter of the injector tip as 1: 6, the oval width refers to the diameter of the tip of the injector as 1: 2. The plate is positioned so that its width is above the longest and shortest sections of the distal edge of the nozzle tip. The material of the insertion depth limiter is made of the same material the injector tip is made of. The injector design provides the possibility of introducing the injector tip into the surgical incision at a controlled depth during implantation of the IOL, which will allow unimpeded implantation of the IOL, increasing the surgeon's convenience and reducing the development of intra- and postoperative complications.

Description

The utility model relates to the field of medicine, namely to ophthalmic surgery, and is intended for delivery of an intraocular lens (IOL) into the cavity of the eye using an injector in the surgical treatment of cataracts.

The current cataract surgery technique involves the use of an injector for implanting IOLs in the eye cavity. The lens is placed in a cartridge inserted into the injector, or directly into the injector body. The tip of the injector is injected to a shallow depth into the cavity of the eyeball through a corneal or scleral incision, and with the help of a supply device containing, as a rule, a manually moved plunger, the IOL is directed through the injector directly into the patient's eye during an ophthalmic surgery. In this case, the tip of the injector should be introduced into the cavity of the eye to a shallow depth, controlled manually by the surgeon. With a deeper insertion of the injector tip into the incision, it is possible to injure intraocular structures, occupy the lens in an incorrect position in the capsular bag, as well as rupture of the anterior capsule and luxation of the IOL in the posterior part of the eye.

Known injector for implantation of IOL (patent RU No. 2679306), consisting of a housing, a depth of insertion limiter located on the distal end of the housing, a tip extending distally beyond the depth of insertion limiter, and a plunger made with the possibility of sliding movement in the cavity of the housing injector. The limiter for the depth of introduction of the tip contains a flange surface, which is a curved surface, including a spherical one. The disadvantages of the injector include the complexity of the design, as well as a small difference in the diameter of the cross sections of the depth gauge and the tip of the injector. As a result, in the process of introducing the injector tip into the incision, the cross-sectional area of the limiter may not be sufficient to prevent the injector tip from moving deeper into the incision; there may be a violation of the architectonics of the incision and the development of intra- and postoperative complications.

As a prototype, we selected an injector for implantation of an IOL containing a body section with a tip having an acute cut angle and a piston (patent US 6010510 from 04.01.2000).

The objective of the utility model is to develop an injector design for IOL implantation, which allows for a controlled introduction of the injector tip into the eye cavity to the optimal depth for unhindered release of the IOL and occupation of the lens in the correct position in the capsule bag.

The problem is solved by the development of an injector for implantation of the IOL of the following design.

An injector for IOL implantation, having a body section with a tip with an acute cut angle (1) and a piston (2). At a distance of not more than 2.5 mm from the longest section of the distal edge of the nozzle tip (3) perpendicular to the injector body, there is a limiter for introducing the tip (4), which is an oval plate with a thickness of not more than 1 mm, the length of the oval refers to the diameter of the injector tip as 1 : 6, oval width refers to the diameter of the tip of the injector as 1: 2. The plate is positioned so that its width is above the longest and shortest sections of the distal edge of the nozzle tip. The material of the tip entry depth limiter is made of the same material as the injector tip.

The technical result from the implementation of the utility model consists in the possibility of introducing the tip of the injector into the surgical incision to a controlled depth during implantation of the IOL, which will increase the convenience of the surgeon and reduce the development of intra- and postoperative complications.

The location of the tip insertion depth limiter at a distance of no more than 2.5 mm from the longest portion of the distal edge of the tip allows the injector tip to be moved to the optimum distance inside the eyeball for unhindered release of the IOL without risk of damage to the intraocular structures.

The dimensions of the tip insertion depth limiter allow reliable fixation of the limiter on the surface of the eyeball, and also provide a good visualization of the injection process into the incision and IOL implantation.

The utility model is illustrated by the following graphic material.

FIG. 1. Injector for IOL implantation.

1 - injector body

2 - piston

3 - nozzle tip

4 - depth gauge for introducing the tip of the injector.

A useful model is as follows (Fig. 1). After cataract removal by phacoemulsification according to the usual method, the injector (1) with an IOL inserted into it and having a tip with an acute angle of cut (3) and a tip depth limiter (4) is placed with the cut down into the corneal incision. Next, the tip of the injector is introduced into the anterior chamber until the surface of the eyeball comes into contact with the depth gauge for introducing the tip, which prevents its further advancement into the anterior chamber. Using a piston, the lens is squeezed out of the tip, the lens occupies the correct position in the capsule bag and the operation is completed.

Claims (1)

An injector for implantation of an intraocular lens, comprising a body portion with a tip with an acute angle of cut and a piston, characterized in that at a distance of not more than 2.5 mm from the longest portion of the distal edge of the nozzle tip, a tip depth limiter, which is oval, is located perpendicular to the body of the injector a plate with a thickness of not more than 1 mm, the oval length refers to the diameter of the injector tip as 1: 6, the oval width refers to the diameter of the injector tip as 1: 2, moreover lozhena so that the width of the oval located on the longest and shortest portions of the distal edge of the injector tip.

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