CZ2005565A3 - Cartridge for storing and/or introduction of eye implant - Google Patents

Abstract

A cartridge for storing and / or introducing an ocular implant, particularly an artificial intraocular lens, is formed by an implant storage box (1) and a delivery cannula (2) of polymeric material, especially polypropylene. The storage box cavity (1) is connected to the inner cavity of the delivery cannula (2). The inlet opening (3) of the storage box cavity (1) has a chamfered edge (4) and the inner surface of the delivery cannula (2) contains a polysaccharide in the surface layer.

Description

(57)

The cartridge for storing and / or inserting an ophthalmic implant, in particular an artificial intraocular lens, comprises an implant storage box (1) and a delivery cannula (2) of a polymeric material, in particular polypropylene. The cavity of the storage box (1) is connected to the inner cavity of the delivery cannula (2). The inlet opening (3) of the storage box cavity (1) has a chamfered edge (4) and the inner surface of the delivery cannula (2) comprises a polysaccharide in the surface layer.

CZ 2005 - 565 A3

PV ÍXS-S6S by Of-Of.OP '

Cartridge for storing and / or inserting an ophthalmic implant

Technical field

The invention relates to a cartridge for storing and / or introducing an ophthalmic implant - an artificial eye lens.

BACKGROUND OF THE INVENTION

Artificial intraocular lenses are fine artificial lenses developed and adapted for permanent placement within the eye. The lenses are made of biocompatible material - which means they are well received by the body and do not require care or maintenance. The lenses are placed either between the cornea and the iris in the anterior chamber of the eye or on the iris or behind the iris in the posterior chamber of the eye. Artificial intraocular lenses are used either in cataract surgery or to replace a human lens that was removed in an earlier cataract surgery. Another application is correction of eye defect. In the case of correction of the eye defect, the human lens remains in the eye and the artificial intraocular lens is in this case called the so called phakic intraocular lens.

For sterile preservation, resp. for insertion of artificial intraocular lens during surgery - implantation is done by special cartridge. These basically consist of a lens storage box and a connected insertion cannula. The intraocular lens, which is sterile in the flat-shaped storage box, is then pushed out of the storage box in the coiled form through the delivery cannula and directed to the implantation site within the eye. A special injector piston, temporarily attached to the cartridge, is used to exert the pressure required to push the lens through the cannula. More rarely, the cartridge is part of a disposable injector.

As already indicated, the lens storage box and insertion cannula form a single cartridge assembly made of polymeric material, most commonly of polypropylene. It serves to bend or roll up an artificial intraocular lens and its introduction into the eye. From this point of view, the current conical shape of the cannula seems to be optimal, with its orifice having a diameter of 1.8 to 3 mm. A certain drawback of the present cartridge design is the hydrophobic inner surface of the cannula, which makes it difficult for the lens to pass through the narrow internal cavity of the cannula during implantation due to friction.

SUMMARY OF THE INVENTION

To overcome the aforementioned drawback of the prior art, the cartridge contributes to the storage and / or insertion of an ophthalmic implant - an artificial intraocular lens of the invention. Cartritge, like the cartridges of hitherto known embodiments, consists of an implant storage box and a delivery cannula of a polymeric material, in particular polypropylene, wherein the cavity of the storage box is connected to the inner cavity of the delivery cannula. SUMMARY OF THE INVENTION The present invention is characterized in that the inlet opening of the cavity of the storage box has a chamfered edge and the inner surface of the insertion cannula comprises carbohydrate poles in the surface layer, in particular heparin.

The benefit of this new cartridge design is a significant reduction in the friction of the implant passing through the delivery cannula during implantation.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of an intraocular lens implant cartridge.

DETAILED DESCRIPTION OF THE INVENTION

The cartridge for storing and insertion of an artificial intraocular lens in an exemplary embodiment (see FIG. 1) is comprised of a lens storage box 1 and a polypropylene insertion cannula 2. The cavity of the storage box 1 is connected to the inner cavity of the insertion cannula 2, the inlet opening 3 of the cavity of the storage box 1 has a chamfered edge 4.

In the surface layer of the inner surface of the polypropylene delivery cannula 2, heparin is fixed by chemical bonding.

Another variant of the solution is to provide the inner surface of the cannula with a coating, the active ingredient of which is heparin.

The treatment of the inner surface of the cartridge cannula greatly reduces the friction when implanting the intraocular lens. This greatly facilitates the passage of the lens through the cannula during implantation. This results in easier and safer handling of the lens as it passes through the cartridge cannula and, in particular, the possibility of further reducing the inner diameter of the delivery cannula, thereby reducing the incision required to implant an artificial intraocular lens. Cutting is one of the long-term goals of ophthalmic surgery. and,

Claims (5)

PATENT CLAIMS Cartridge for the storage and / or insertion of an ophthalmic implant, in particular an artificial intraocular lens, comprising an implant storage box and an insertion cannula of a polymeric material, in particular polypropylene, wherein the insertion cavity is connected to the inner cavity of the insertion cannula. (3) the storage box cavity (1) has a chamfered edge (4) and the inner surface of the delivery cannula (2) comprises a polysaccharide in the surface layer. Cartridge according to claim 1, characterized in that the polysaccharide is heparin. Cartridge according to claim 1, characterized in that the polysaccharide is fixed in the surface layer of the polymeric cannula material by chemical bonding. Cartridge according to claim 1, characterized in that the polysaccharide forms part of the coating of the inner surface of the cannula. Cartridge according to claim 1, characterized in that the inlet opening (3) of the cavity of the storage box (1) is circular in shape.