Patent ID: 6533750
Filing Date: 2003-03-18
Classification: A61F,A61M

Abstract:
A phacoemulsification needle comprising:a needle body having an outside surface and an aspiration lumen therethrough; a hub, disposed at a proximal end of said needle body, for engaging an ultrasonic handpiece in order to couple ultrasonic energy to said needle body; a tip, disposed at a distal end of said needle body, for penetrating tissue to be emulsified, said tip having a larger diameter than said needle body, said tip having a tip end disposed in a plane perpendicular to a tip longitudinal axis; and a conical ultrasonic radiation surface, disposed in said tip, for focusing the ultrasonic energy in a converging manner in said tissue in order to break up tissue particles before the tissue particles enter said tip, the radiation surface having a maximum diameter greater than the needle body outside diameter.