PHACOEMULSIFICATION CANNULA WITH IMPROVED PURCHASE

摘要

A phacoemulsification cannula (10) includes a hub (12) for engagement wit h an ophthalmic surgical instrument. An elongated needle (14) having a proxi mal end (16) is attached to the hub (12). The cannula (10) has an aspiration lumen (20) spanning a majority of a length of a needle (14) from the proxim al end towards a distal end (18). A venturi lumen (22) is formed in the need le adjacent the distal end. The venturi lumen (22) is in communication with the aspiration lumen (20) so that fluid and tissue may be aspirated through the venturi lumen (22) and the aspiration lumen (20).