Surgical cutting instrument with reciprocating inner cutter

Details Surgical cutting instrument with reciprocating inner cutter Surgical cutting instrument with reciprocating inner cutter

1990-03-16

1991-01-22

Hindenburg, Max

Surgery

Instruments

Means for removing, inserting or aiding in the removal or...

606171, 128753, A61F 1732

Patent

active

049868276

ABSTRACT:
A surgical cutting instrument such as for use in intraocular surgery having a handpiece with an elongate probe extending forward from it. The probe has an elongate stationary outer cutter with a port at its tip and an elongate inner cutter with a cutting surface coaxially disposed therein. The interior of the inner cutter communicates with a vacuum source. A spring and diaphragm assembly in the handpiece and powered by a low pressure pump causes the inner cutter to rapidly reciprocate axially in the outer cutter, and body material, such as vitreous material, drawn in through the port by the vacuum source is thereby chopped by the cutting surface and aspirated out of the patient's body through the handpiece. A large adjustment nut on the handpiece allows the size of the port to be easily adjusted. Irrigation fluid can be provided at the surgical site through an infusion cap which is adjustable both longitudinally and rotatably on the handpiece.

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"Microvit Vitrectomy System", Copyright 1983.
International Publication No. WO 81/01363, "Co-Axial Tube Surgical Infusion/Suction Cutter Tip", 1981, Frost.

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