RU184161U1 - 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 provides the possibility of unhindered passage of a high diopter lens through a narrow-nozzle injector and its exit through the injector tip, as well as the proper placement of the IOL in a 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 an acute cut angle and is conical in shape with an outer diameter of the wide part of not more than 2.4 mm, the outer diameter of the narrow part of not more than 1.6 mm, and five longitudinal weakening cuts of 2-3 lengths are made from the outer edge of the injector tip mm

Due to the design of the injector, the IOL of high diopter from the tip of the injector is unhindered, the lens is placed correctly in the capsule bag, and the premature exit of the IOL from the tip of the injector is eliminated.

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), thereby reducing the resistance from the side of the eye tissue when the injector is inserted into the incision. However, the use of an injector tip with a diameter of at least 2.2 mm leads to additional injury to the surgical wound by the edges of the tip, which creates inconvenience for the surgeon and increases the risks of intraoperative complications, in particular, prevents the rapid sealing of the surgical wound.

A known injector for IOL implantation (patent for utility model RU No. 170625) having a cone-shaped tip with an acute cut angle and a wide part diameter of not more than 2.4 mm, narrow part - not more than 1.6 mm to provide easier insertion of the injector tip into the corneal incision. From the outer edge of the nozzle tip, four longitudinal weakening incisions of 2-3 mm are made, prototype. This design of the injector tip allows for easier insertion of the injector tip into the corneal incision, however, in high-diopter IOLs (25-26 diopters and above), lens stiffness is high due to the large thickness of the optics. Because of this, a high resistance arises when such a lens passes through an injector with a narrow nose, and four cuts may not be enough to prevent the lens from getting stuck in the injector and breaks in the lines of cuts leading to premature exit of the lens from the injector.

The technical task of the utility model is to develop an injector design for implanting high-diopter IOLs, which allows for easier insertion of the injector tip into the corneal incision, unhindered passage of the lens through the injector and its exit from the tip, as well as proper placement of 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 an outer diameter of the wide part of not more than 2.4 mm, an outer diameter of the narrow part of not more than 1.6 mm, and five longitudinal weakening cuts of 2-3 lengths are made from the outer edge of the injector tip mm

Thanks to five longitudinal incisions of 2-3 mm in length, an unobstructed exit of the lens with high diopter from the tip with a narrow diameter is achieved when the tip of the injector is inserted into the front chamber to a depth slightly more 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.

Five cuts on the tip of the injector provide a sufficient degree of fixation of the IOL of high diopter at the moment of exit from the tip of the injector and the lens occupies the correct position in the capsule bag.

The technical result consists in the following: thanks to five longitudinal cuts, a “stuck” high-diopter lens in the injector with a narrow tip is prevented, the lens exits unimpeded from the tip, 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. The injector for implantation of the IOL, having five longitudinal incisions on the tip.

1 - injector body; 2 - tip of the injector; 3 - the 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 a high diopter IOL inserted into it, having a cone-shaped tip with an acute cut angle (2) and five longitudinal weakening cuts from the outer edge of the tip, (4) is placed with the cut down into the corneal cut . 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 conical tip with an acute cut angle having an outer diameter of the wide part of not more than 2.4 mm, an outer diameter of the narrow part of not more than 1.6 mm, and a piston, characterized in that from the external the edges of the nozzle tip carry out five longitudinal weakening incisions 2-3 mm long.

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