WO2018038691A1

WO2018038691A1 - Shrinkable injection cushion for intraocular lens

Info

Publication number: WO2018038691A1
Application number: PCT/TR2017/050226
Authority: WO
Inventors: Suleyman Can VARLIBAS
Original assignee: VSY Biyoteknoloji ve Ilac Sanayi AS
Current assignee: VSY Biyoteknoloji ve Ilac Sanayi AS
Priority date: 2016-08-24
Filing date: 2017-05-30
Publication date: 2018-03-01
Anticipated expiration: 2019-02-24
Also published as: TR201611980A2

Abstract

This invention is related to a silicon cushion (1) which includes basically at least one hollow interior part and at least one outer surface (11) which has narrowing| geometry, in contact with body (G) and cartridge (K) inner walls; provides the lens to be pushed through the body (G) and the cartridge (K) and placement of the lens safely.

Description

SHRINKABLE INJECTION CUSHION FOR INTRAOCULAR LENS Technical Area

This invention is related to a silicon cushion which provides placement of a lens without damaging the eye during eye surgeries.

Prior Art

Lens injectors have been used with the aim of lens implantation to the patient's eye during the eye surgeries in the prior art. The relevant lens injectors are consisting of body, plunger, silicon cushion and cartridge channel parts basically. Lens fitted in the body is pushed out with the aid of piston in the body and cartridge channel. In the systems used in the prior art, silicon cushion pushes the lens by stretching thus elongating in the cartridge channel. In present systems, the cushion has less ability to be flexible and elongate. Silicon cushion may be squeezed while the lens is being pushed. Silicon cushions press cartridge channel inner walls by squeezing especially in the cartridge channels and may deform cartridge channel. Pushing force which is required for transition of the lens through the cartridge increases due to the squeezing and pressure problems.

In present systems, transition of a lens in minimal incision sizes as 1.8 mm is hard and it is seen that lens is deformed because of the silicon cushion squeeze. Sometimes cartridge channel is deformed as a result of this pressure. In case of a too much squeezing of the silicone cushion, cartridge channel may be cracked, as for that any deformation in the cartridge channel may damage the lens.

In the United States document US20130226194A1, an injection system for intraocular lenses is mentioned. The system of the invention comprises basically; an injector, an intraocular lens cuttler and a lens holder container. As for that the relevant injector comprises an inject channel and a piston moving within the channel, a hollow that meets the cuttler. However, there is a cushion made of soft elastic material in front of the piston and moving in the channel. The cushion may be coated with a lubricant to reduce the friction effects in the channel. The relevant system and the cushion are insufficient in the matter of safe lens implantation.

In virtue of the cushion which is the subject of the invention, lens moves without squeezing in the cartridge channel, presses cartridge channel less and pushes the lens safely. Compared to the systems which have narrow incision size (eg 1.8 mm), it provides pushing of the lens with less pushing force safely.

Short Description of the Invention

The purpose of the invention is to realize an injector cushion which has a cushion that provides safe implantation of the lens without damage.

Another purpose of the invention is to realize a lens injector cushion that reduces pushing force which is applied to cartridge inner walls during the lens implantation.

Another purpose of the invention is to realize a lens injector cushion which reduces the force required for pushing the lens.

Another purpose of the invention is to realize a lens injector cushion which can be used for cartridges which have different cut intervals.

Disclosure of the Invention

In order to fulfill the purpose of this invention, attached figures belong to glass fixing system are as below.

Figure 1. is a view of the cushion in the body that belongs the prior art.

Figure 2. is a view of the cushion that belongs the prior art in the cartridge channel.

Figure 3. is a view of the cushion which is the subject of the invention. Figure 4. is a view of the cushion which is the subject of the invention in the body.

Figure 5. is a view of the cushion which is the subject of the invention in the cartridge channel.

Parts in the figure are numbered and their correspondences are given below.

1. Lens injector cushion

11. Outer surface

12. Interior part G. Body

K. Cartridge channel

P. Plunger

Y. Cushion that belongs the prior art. Basically, at least one cushion which provides to proceed of the lens by elongating thus stretching along the movement of the plunger (P) due to geometries of the body (G) inner wall and cartridge channel (K) inner wall, in contact with a body (G) inner wall and a cartridge channel inner wall (K).

At least one outer surface (11) which provides gradual stretch thus elongation in the cartridge channel (K) inner wall and the body (G) inner wall with its narrowing geometry.

Comprises at least one inner part (12) which reduces compressive force occurs in the inner walls and ensures lens movement without squeezing by increasing amount of stretch and elongation in a narrowing part of the cartridge (K) channel inner wall and in the body (G) inner wall with its hollow structure.

The cushion which is the subject of the invention can move in the body and in the cartridge channel which is narrowing according to the body by means of its own outer surface and its inner part. Even in the cartridges which have small cut intervals it prevents deformation of the lens by pushing the lens safely.

Cushion diameter (1) can wane more in the cartridge channel (K) than can wane in the body (G) by means of the hollow interior part (12). Therefore, pressure which is done to the cartridge channel inner wall by the cushion while the cushion (2) passing through the cartridge channel (K) reduces. By means of the hollow interior part (12), it is provided that lens is delivered in the cartridge channel (K) without cushion (1) squeeze problem. By means of the improved cushion (1) that can elongate and stretch more in the cartridge channel, lens can be pushed safely in smaller diameters.

In one embodiment of the invention, gaps which are formed in different geometric shapes such as sphere, ellipsoid, cylinder, torus, cone, regular or irregular polygonal prism and curvilinear forms and other various shapes can be happen in the interior part (12). Outer surface (11) which is the subject of the invention has a narrowing geometry. This structure of the surface (11) provides cushion to (1) elongate and stretch gradually in the narrowing body (G) or cartridge channel (K) parts. By this way, cushion squeze problem is removed.

In one embodiment of the invention, the angle of inclination of the outer surface (12) can differ according to the geometry and (G) the body which its narrowing expansion regime that is used or cartridge channel dimensions (K).

In one embodiment of the invention, the cushion (1) is made of an elastic material, preferably silicone.

In one embodiment of the invention, the cushion (1) can be used in cartridge channels (K) with different cut intervals in virtue of the flexible structure of the material which is used for the production and hollow interior part that provide more stretching in the narrowing inner part (12).

Claims

1. In contact with a body inner part (G) and a cartridge channel (K) inner wall, provides lens to proceed by elongating thus stretching along the plunger movement, owing to the body (G) inner wall and cartridge channel geometries basically;

At least one outer surface (11) which provides elongating thus stretching gradually in the body inner wall (G) and in the cartridge channel (K) by means of its narrowing geometry.

A lens injector cushion (1) which is characterized by at least one inner part (12) that reduces compressive force occurred in inner walls, provides lens to proceed without squeezing by increasing the amount of stretch and elongation in a narrowing part of the cartridge channel (K) inner wall and body inner wall (G) with hollow structure.

2. A lens-injector cushion (1) as in claim 1, characterized by an outer surface which can differ according to the inclination angle, geometry and the body (G) which its narrowing expansion regime is used or cartridge channel dimensions.

3. A lens-injector system (1) as in claim 1, characterized by an inner part (12) which may have gaps in curvilinear form, in the form of sphere, ellipsoid, cylinder, torus, cone, regular or irregular polygonal prism.

4. A lens injector cushion (1) as in claim 1, characterized in that it is made of an elastic material.

5. A lens injector cushion (1) as in claim 1, characterized by the usability in cartridge channels (K) which have different cut intervals by means of flexible structure of the material produced and the hollow interior that ensures more flexibility in narrowing inner walls.