RU174785U1 - INJECTOR FOR IMPLANTATION OF AN INTRAOCULAR LENS - Google Patents

Abstract

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 for cataract phacoemulsification.

The task is to develop an injector design for IOL implantation, which enables easier insertion of the injector tip into the corneal incision, unhindered passage of the lens and its exit through the injector tip, and proper placement of the IOL in the capsule bag.

The technical result is achieved by the development of an injector for implantation of the IOL of the following design.

An injector for implanting an IOL having a body section with a tip and a piston. The tip of the injector has a sharp cut angle and is conical in shape, with the outer diameter of the wide part being no more than 2.4 mm, the outer diameter of the narrow part being no more than 1.6 mm, and three longitudinal weakening incisions are made from the outer edge of the injector tip 2 in length -3 mm.

Due to the design of the injector, an easier insertion of the injector tip into the corneal incision is provided, which reduces damage to the eye tissue, minimizes stress on the surgical wound, and also ensures unhindered release of the IOL from the injector tip, the correct placement of the IOL in the capsule bag, and the possibility of reducing incisions is achieved. through which the IOL should be extruded during administration.

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 for cataract phacoemulsification.

Current trends in cataract surgery include minimizing surgical access, developing not only new implant materials and original IOL models, but also more advanced means of their delivery.

The injectors currently used in ophthalmosurgery for introducing an IOL into the eye cavity have a tip diameter of approximately 2.2-2.4 mm, i.e. corresponding to the size of the corneal incision.

A device for implanting an IOL is known (patent WO2001064147 dated 01.03.2000), comprising two V-shaped cutouts on the tip that facilitate the exit of the lens from the injector. However, this design of the tip makes it difficult to enter the injector into the corneal incision, does not provide a sufficient degree of fixation of the lens at the time of implantation (the lens can rotate and injure the corneal endothelium), and do not contribute to the lens occupying the correct position in the capsular bag.

The tip of the injector can be made beveled on one side (patent US 6010510 from 04.01.2000), prototype. Due to this tip design, the resistance from the side of the eye tissue when injecting the injector into the incision is reduced, however, using an injector tip with a diameter of at least 2.2 mm leads to additional injury to the surgical wound by the tip edges, which creates inconvenience for the surgeon to work and increases the risks of intraoperative complications, in particular, prevents the rapid sealing of the surgical wound.

The technical task of the utility model is to develop an injector design for IOL implantation, which makes it possible to more easily insert the injector tip into the corneal incision, the lens to pass through the injector and exit from the nozzle, and correctly place the IOL in the capsule bag.

To solve this problem, an injector for implanting an IOL of the following design is proposed.

An injector for implanting an IOL having a body section with a tip and a piston. The tip of the injector has an acute cut angle and is conical in shape, with the outer diameter of the wide part being no more than 2.4 mm, the outer diameter of the narrow part being no more than 1.6 mm, and three longitudinal weakening cuts of length 2 are made from the outer edge of the tip of the injector -3 mm.

The outer diameter of the narrow part of the tip of the injector is not more than 1.6 mm provides an easier insertion of the tip into the corneal incision. Due to the longitudinal incisions of 2-3 mm in length, the lens exits unobstructed from the tip with a narrow diameter when the injector tip is introduced into the front chamber to a depth slightly greater than the length of the tip cuts. The materials used for the manufacture of injectors (in particular polypropylene) have sufficient rigidity to prevent uncontrolled rupture along the notch lines when the lens passes through the nozzle tip and, therefore, to prevent premature exit of the lens from the tip. Three cuts on the tip provide a sufficient degree of fixation of the lens at the time of exit from the tip of the injector and the lens occupies the correct position in the capsule bag.

The technical result is as follows:

- provides an easier insertion of the injector tip into the corneal incision, which minimizes stress on the surgical wound, reduces damage to eye tissue, increases the convenience of the surgeon and reduces the rehabilitation time of patients;

- reducing the diameter of the tip will lead to the possibility of reducing the incisions through which the IOL should be extruded during administration; in this way, it is possible in the future to perform cataract phacoemulsification through smaller incisions;

- thanks to the longitudinal cuts, “stuck” of the lens in the injector with a narrow tip is prevented, unhindered exit of the lens from the tip is ensured, the lens occupies the correct position in the capsule bag, and premature exit of the lens from the nozzle tip is eliminated.

The utility model is illustrated by the following graphic material.

FIG. 1. Injector for implantation of the IOL, having three longitudinal incisions on the tip.

1 - injector body

2 - nozzle tip

3 - piston

4 - longitudinal laxative incisions

The implementation of the utility model (Fig. 1). After cataract removal by phacoemulsification according to the usual method, an injector (1) with an IOL inserted into it and having a cone-shaped tip with an acute cut angle (2) and longitudinal laxative cuts from the outer edge of the tip (4) is placed with the cut down into the corneal incision. Next, the tip of the injector is introduced into the front chamber to a depth slightly more than the length of the laxative incisions and with the help of the piston (3) they begin to advance the lens to the tip. At the time of extrusion of the IOL, the tip opens along the notch lines, which allows the lens to be easily implanted into the capsule bag and take the correct position in it.

Claims (1)

An injector for implanting an intraocular lens, comprising a body portion with a tip having an acute tip cutoff angle and a piston, characterized in that the tip of the injector is conical, the outer diameter of the wide part is no more than 2.4 mm, the outer diameter of the narrow part is not more than 1, 6 mm, while from the outer edge of the tip of the injector, three longitudinal weakening incisions of 2-3 mm are performed.

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