Surgery – Instruments – Means for removing – inserting or aiding in the removal or...
Reexamination Certificate
1998-03-11
2002-06-18
Truong, Kevin T. (Department: 3731)
Surgery
Instruments
Means for removing, inserting or aiding in the removal or...
Reexamination Certificate
active
06406481
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to an intraocular lens insertion system having one or more disposable components, in particular an intraocular injection system comprising two separate main components including a disposable injecting device and a disposable cartridge.
BACKGROUND OF THE INVENTION
The intraocular lens injection system currently being sold and marketed by STAAR Surgical Company of California has gain widespread acceptance in the field of intraocular lens replacement. The current system utilizes an injector made of titanium so that the unit can be autoclaved and reused numerous times. The components of the titanium injector are machined from bar stock to a high degree of accuracy according to current specifications, and then the components are assembled into the final injector unit. The cost of the materials, and labor costs involve with machining and assembly are substantial providing an incentive to seek less expensive alternatives. Further, the steps of cleaning and autoclaving the injector unit between operations is a time burden and nuisance to busy surgeon practitioners having back-to-back operation schedules. In addition, the injector must be properly autoclaved to ensure complete cleaning and sterilization to prevent spread of diseases causing eye infections or other infectious diseases, prevent transmission of body fluid and prevent resulting liability problems to surgeon practitioners. These any other considerations have led to the development of the present invention.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a disposable intraocular lens insertion system.
A second object of the present invention is to provide one or more disposable components of an intraocular lens insertion system.
A third object of the present invention is to provide a disposable intraocular lens insertion system comprising two main separate components including a disposable injecting device and disposable cartridge.
A fourth object of the present invention is to provide a disposable injecting device for an intraocular lens injection system.
A fifth object of the present invention is to provide a disposable cartridge for an intraocular lens injection system.
A sixth object of the present invention is to provide a disposable cartridge having a downwardly tapering passageway for further folding the intraocular lens as it moves through the cartridge.
A seventh object of the present invention is to provide a disposable cartridge unit including a disposable cartridge containing a preloaded foldable intraocular lens.
A eighth object of the present invention is to provide a two-piece disposable cartridge system comprising a lens holding portion and a sleeve portion.
A ninth object of the present invention is to provide an intraocular lens injecting system comprising a cartridge, which front loads and locks to a injecting device.
A tenth object of the present invention is to provide an intraocular lens injecting system having a pre-loaded intraocular lens for storage and shipment.
An eleventh object of the present invention is to provide an intraocular lens injecting system comprising an injecting device and cartridge with an intraocular lens pre-loaded in the cartridge for storage and shipment.
These and other objects can be achieved by various embodiments of the present invention. Specifically, one or more components of the intraocular lens insertion system according to the present invention are disposable. Preferably, the entire system excluding the intraocular lens itself is disposable to provide the full advantages according to the present invention.
The components of the intraocular lens insertion system according to the present invention must withstand sterilization methods, in particular autoclaving, in order to be practically utilized. Preferably, the components of the intraocular lens insertion system according to the present invention are made from plastic, most preferably autoclavable plastic (i.e. plastic having a melting point above approximately 121 degree Celsius) such as polysulfone, polycarbonate, nylon-66, TEFLON and KYNAR that can withstand the conditions of high temperature and pressure inside conventional autoclaving units. Further, the use of plastic allows the components of the intraocular injection system to be injection molded and quickly assembled significantly reducing cost in the construction thereof verses a stainless steel injector.
An embodiment of the disposable injection system comprises two separate main components including an injecting device having a barrel with a cartridge receiver for accommodating a cartridge, and a cartridge for accommodating a foldable intraocular lens. The injecting device preferably includes a cylindrical barrel having one end open, and an opposite end fitted with a movable plunger. Specifically, the end fitted with the movable plunger is provided with a guide for defining a passageway for accommodating the movable plunger. The guide is preferably molded as part of the inside of the cylindrical barrel, however, alternatively can be made as a separate piece and then assembled in some suitable manner inside the cylindrical barrel.
The guide preferably is configured to allow sliding movement of the movable plunger in a longitudinal direction with relation to the cylindrical barrel, however, not allowing rotational movement of the movable plunger with respect to the cylindrical barrel. For example, the guide is provided with a keyway preventing relative rotation. In one preferred embodiment, the passageway through the guide has a passageway with a cross-sectional shape matching a movable plunger preventing relative rotation.
The open end of the cylindrical barrel provides a cylindrical shaped receiver for accommodating the cartridge containing the intraocular lens. Further, the open end of the cylindrical barrel is provided with means for connecting and securely retaining the cartridge inside the front open end of the cylindrical barrel. For example, a snap fit connection is provided between the cylindrical barrel and cartridge so that when the cartridge is inserted in the end of the cylindrical barrel these components snap fit together forming a secure connection. Alternatively or in addition, an interference type connection can be provided between the open front end of the cylindrical barrel and the cartridge so that these components are securely connected together when inserting the cartridge into the open end of the cylindrical barrel. The interference connection can be provided by sizing the outer dimensions of the cartridge slightly greater than the inner dimension of the open end of the barrel. Further, one or both components can have tapering outer surfaces or taps that interfere with each other to provide the interference type connection.
One end of the plunger is provided with a manipulating tip for making contact with the intraocular lens, forcing the intraocular lens from the cartridge, and manipulating the intraocular lens inside the eye, and an opposite end provided with means for actuating the plunger. The opposite end can be provided with a freely rotating finger tip gripping device to allow a user to exert sufficient pressure on the end of the plunger to controllably force the intraocular lens from the cartridge. For example, the finger tip gripping device is provided with a fluted exterior surface to facilitate gripping thereof, and a through hole having a predetermined size. The end of the plunger component is provided with an extension having a hooked end that can be forced into and through the through hole in the finger tip gripping device providing a snap connection between these components, and also allowing free rotation between these components.
The manipulating end is faceted in a particular manner to prevent damage to the intraocular lens, particularly the trailing haptic, during the step of forcibly pushing the intraocular lens through the nozzle of the cartridge and into the eye.
The disposable cartridge can have a variety of configurations. A preferred embodim
Eagles Daniel C.
Feingold Vladimir
Klima William L.
Law Offices of William L. Klima, P.C.
Starr Surgical Company, Inc.
Truong Kevin T.
LandOfFree
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