Multi-functional second instrument for cataract removal
View Patent ↗Apparatus for the removal of lens tissue includes a first instrument for inserting into a lens capsule and removing a cataract therein, the first instrument including a lumen for aspiration of cataract tissue and irrigation fluid from the lens capsule and manipulate the cataract until cataract is removed. The second instrument includes an irrigation port for introducing the irrigation fluid into the lens capsule.
1. Apparatus for the removal of lens tissue, said apparatus comprising:
a first instrument having a shaft insertable into a lens capsule and a manipulating tool tip, said first instrument having an irrigation port introducing irrigation fluid into said lens capsule; and
a second instrument, including an unsleeved needle configured to ultrasonically vibrate and insertable into the lens capsule, the second instrument including a primary aspiration port and a lumen therethrough configured to aspirate emulsified cataract tissue and irrigation fluid from said lens capsule, the second instrument also including one or more secondary ports disposed along a length of the lumen and configured to aspirate emulsified cataract tissue, irrigation fluid, or both, said unsleeved vibrated needle having a diameter enabling insertion of said unsleeved vibrated needle through a wound opening of less than about 2 mm, wherein the first instrument and the second instrument are separate handpieces.
2. The apparatus according to claim 1 wherein said shaft includes an irrigation fluid delivery shaft lumen therethrough.
3. The apparatus according to claim 1 wherein said first instrument comprises a conduit, attached to said shaft, configured to deliver the irrigation fluid to said irrigation port.
4. The apparatus according to claim 1 wherein said first instrument comprises a plurality of irrigation delivery ports.
5. The apparatus of claim 1 , wherein said one or more ports are disposed within 6 mm of the primary aspiration port.
6. The apparatus of claim 1 , wherein said one or more ports have a cross-sectional area of no more than 10% of the cross-sectional area of the primary aspiration port.