Patent ID: 9089592
Filing Date: 2015-07-28
Classification: A61F,A61K

Abstract:
1. A method for tearing a viscoelastic material into smaller-sized pieces and gradually carrying away the smaller-sized pieces under perfusion in micro-incision cataract surgery comprising incising cornea, injecting the viscoelastic material into the anterior chamber through the incision, crashing nucleus of the lens using ultrasonic wave and removing the crashed nucleus under perfusion of a perfusion fluid using an Ultra-sleeve or Nano-sleeve, wherein the viscoelastic material is a solution consisting of hyaluronic acid having a weight average molecular weight of from 600,000 to 1,200,000 or salt thereof and a saline solution to dissolve the hyaluronic acid or salt thereof, concentration of the hyaluronic acid or salt thereof in the solution is about 1% (w/v), and flow rate of the perfusion fluid in the anterior chamber is set to be 30 to 45 mL/min, wherein the viscoelastic material is torn into smaller-sized pieces and gradually carried away under perfusion.