| abstract |
A tip for a liquefraction surgical handpiece. The tip uses at least two channels or tubes. One tube is used for aspiration and at least one other tube is used to inject heated surgical fluid for liquefying a cataractous lens. The distal portion of the injection tube terminates just inside of the aspiration tube and can be steered or directed so that heated fluid escaping the injection tube can be injected directly into the eye or reflected off of the internal wall of the aspiration tube prior to entering the eye. Alternatively, the injection tube may be relatively rigid but be extendable or contain a rotatable deflector that alternatively allows the heated fluid to be injected directly into the eye or reflected off of the internal wall of the aspiration tube. The handpiece may also contain other tubes, for example, for injecting relatively cool surgical fluid. |