Surgical cutting instrument

Details Surgical cutting instrument Surgical cutting instrument

A - Human Necessities

61

B

128/113

A61B 17/32 (2006.01) A61B 17/22 (2006.01) A61F 9/00 (2006.01) A61F 9/007 (2006.01) A61B 17/00 (2006.01)

Patent

CA 1309631

SURGICAL CUTTING INSTRUMENT Abstract of the Disclosure A surgical cutting instrument such as for use in intra- ocular surgery having a handpiece with an elongate probe extend- ing 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.

579213

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