公开(公告)号：CA1318000C

公开(公告)日：1993-05-18

申请号：CA616191

申请日：1991-09-27

Applicant: VALLEYLAB INC

Inventor： WUCHINICH DAVID G ,  BRENDOLAN ROBERT ,  KATZ LOUIS

IPC: A61B10/00 ,  A61B10/02 ,  A61B17/22 ,  A61B17/32 ,  A61B18/00 ,  A61B18/14 ,  A61M1/00 ,  B06B1/02 ,  A61H21/00

Abstract: Apparatus for endoscopic removal of compliant biological tissues utilizing an endoscopic ultrasonic aspirator comprising irrigation and aspiration means, a piezoelectric ultrasonic transducer, a first resonator such as a half-wave stepped velocity transformer, a probe including a second resonator such as a constant-stress velocity transformer, a blunt or modified working tip of open channel means or restricted tubular means for application of ultrasonic energy to cellular material, and a capacitive fluid sensor to detect the presence of irrigation fluid adjacent these transformers within the instrument. The surgery is advantageously performed by operating the transducer in the 10-20 kHz range to achieve maximum cavitation of the intracellular fluids in the tissues to be removed.

公开(公告)号：AT97314T

公开(公告)日：1993-12-15

申请号：AT86905555

申请日：1986-08-27

Applicant: VALLEYLAB INC

Inventor： WUCHINICH DAVID G ,  BRENDOLAN ROBERT ,  KATZ LOUIS

IPC: A61H23/02