Method of use of an ultrasonic surgical pre-aspirator having a orifice by-pass

• US 4,516,398 A
• Filed: 06/05/1984
• Issued: 05/14/1985
• Est. Priority Date: 10/08/1980
• Status: Expired due to Term

• Current Assignee: Sherwood Services AG
• Original Assignee: Cooper Lasersonics Incorporated
• Inventors: Wuchinich, David G.
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): KRUTER, JEROME
• Application Number:
  US06/617,146
• Time in Patent Office: 343 Days
• Field of Search: 32/33, 433/119, 433/86, 433/87, 128/305, 128/276-278, 128/6, 128/24 A, 128/768, 128/214 R, 15/345, 15/346, 15/421, 15/340, 604/22, 604/26, 604/28, 604/46, 604/35
• 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 2017/320084 Irrigation sleeves
• CPC Class Codes: A61M 1/85 with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208

Abstract

The method of aspirating body tissue and blood from a surgical site along a suction passage having a suction port at an ultrasonically vibrated end of a tool for fragmenting the tissue at the surgical site is improved by introducing an anti-coagulant fluid into the suction passage independently of the suction port.

Claims

1. A method for preventing clogging of a surgical aspirator with fragmented tissue and blood removed from a surgical site by aspiration through a suction passage of said surgical aspirator, said aspirator comprising an ultrasonic tool having a longitudinal axis and a free end portion adapted to ultrasonically vibrate along said axis of said tool, a suction passage extending through said tool generally parallel to said axis, said suction passage defining a suction port at said free end portion, a sleeve coaxially surrounding said tool and spaced therefrom and extending substantially to said free end of said tool to define an annular fluid supply passage having an annular orifice surrounding said tool, and at least one orifice extending through said tool from said fluid supply passage to said suction passage, said orifice disposed adjacent said free end of said tool and wherein said method comprises:

ultrasonically framgenting tissue causing bleeding and body fluid excretes;

supplying an anticoagulating and irrigating fluid to said fluid supply passage;

introducing substantially all of said anticoagulating fluid together with irrigation fluid into said suction passage through said orifice extending from said fluid supply passage to said suction passage;

diluting said tissue and blood with said anticoagulating fluid;

preventing substantially all of said anticoagulating and irrigating fluid from contacting said free end of said tool and from reaching the surgical site through the tool so as to prevent excessive bleeding at the surgical site and to further prevent atomization of said anticoagulating and irrigating fluids with said free end of said ultrasonic tool; and

aspirating fragmented tissue, body fluids, anticoagulant and irrigation fluids.