Removal of tissue

• US 5,911,699 A
• Filed: 03/28/1997
• Issued: 06/15/1999
• Est. Priority Date: 07/17/1990
• Status: Expired due to Fees

• Current Assignee: Alcon Incorporated
• Original Assignee: Aziz Yehia Anis
• Inventors: Steen, Mark E., Anis, Aziz Y.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US08/828,928
• Time in Patent Office: 809 Days
• Field of Search: 606/107, 606/108, 606/180, 606/159, 604/22
• US Class Current: 604/22
• CPC Class Codes: A61B 17/22012 in direct contact with, or very close to, the obstruction or concrement for removing obstructions in blood vessels by laser A61B18/245
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 2017/22008 used or promoted
• CPC Class Codes: A61B 2017/22011 Combined types of vibration, e.g. ultrasonic and electrohydraulic
• CPC Class Codes: A61B 2017/320077 double edge blade, e.g. reciprocating
• CPC Class Codes: A61B 2017/32008 preventing clogging of suction channel
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic
• CPC Class Codes: A61F 9/00763 with rotating or reciprocating cutting elements, e.g. concentric cutting needles atherectomy cutting instruments A61B17/3207; endoscopic cutting instruments A61B17/320016

Abstract

To reduce damage to surrounding tissue while fragmenting some tissue such as for example not damaging the capsular wall while removing the lens during cataract removal surgery or not damaging artery or vein walls during bypass surgery while freeing the artery or vein to be transplanted, an incision is made for the insertion of surface--a handpiece tip. The tip is rotated and reciprocated ultrasonically at the same time so that tissue is fragmented by the combined motion of a fragmenting surface perpendicular to the surface and at an angle to the surface many times during a single revolution or part of a revolution.

Claims

1. An apparatus for removing tissue from a patient, comprising:

an operative tip mounted for reciprocation along an axis and rotation about the axis simultaneously;

said operative tip having a central opening aligned with said axis;

means for rotating said operative tip about said axis;

means for reciprocating said operative tip while said operative tip is rotating at a speed that fragments tissue within a central rotating funnel zone;

said operative tips, means for rotating and means for reciprocation comprising an instrument;

a source of power;

means for applying vacuum pressure to said central opening to aspirate fragmented tissue and vitreous fluids within said central rotating funnel zone; and

interface means for matching the source of power to any one of a plurality of instruments, one of said plurality of instruments being said apparatus for removing tissue wherein the source of power may drive any of a plurality of instruments.

2. An apparatus according to claim 1 in which said operative tip is symmetrical.