×

Torsional Ultrasound Hand Piece That Eliminates Chatter

  • US 20100324581A1
  • Filed: 09/03/2010
  • Published: 12/23/2010
  • Est. Priority Date: 12/08/2006
  • Status: Active Grant
First Claim
Patent Images

1. An ophthalmic ultrasound surgical instrument, comprising:

  • a surgical hand piece suited for phacoemulsification that includes a phacoemulsification needle that is hollow to define an aspiration passage and that distally terminates at a tip with a tip port, the needle being bent or angled;

    an infusion sleeve arranged radially outside of the needle so as to define therebetween an irrigation passage to channel irrigation flow, the infusion sleeve defining an irrigation opening arranged for the irrigation flow to exit the irrigation passage;

    a horn with a distal section and a resonant section, the distal section being longer than the resonant section, the horn coupled to the needle; and

    a driver configured and arranged to impart a twisting, rotative movement to the tip at an elevated resonant frequency sufficient to eliminate chatter otherwise present at lower resonant frequencies.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×