Stryker Corporation

Ryon J Dierck

Reid S Cover

Barry J Kauker

A surgical tool arrangement for performing endoscopic surgical procedures which includes a powered handpiece and a cutting accessory which detachably connects to the handpiece and incorporates multiple blade configurations or styles into one accessory. The accessory includes a cutting element which rotates within an outer housing element, wherein each element has a cutting window at its distal end, and one of the cutting windows has two sides which have differently configured cutting geometries. One of the cutting windows has a first side with a cutting edge that is toothed and a second side with a cutting edge that is generally straight.

Surgical tool arrangement and surgical cutting accessory for use therewith with the tool arrangement including a toothed cutting edge and a generally straight cutting edge

Sensing arrangements for a handpiece sense suction pressure or fluid flow within a suction path to determine the position of a movable cutting element relative to a fixed cutting element of a cutting accessory. A controller calculates actual speed of the movable cutting element from measured pressure or measured fluid flow. The cutting elements have openings that, when aligned, form a window. The controller controls power to a motor that drives the cutting element. When the handpiece is deactivated, the controller stops the movable cutting element at a predetermined position to close or partially close the window. The controller controls the cutting speed in view of joint pressure combined with suction pressure, or in view of fluid flow through the suction path, to maintain an optimal fluid flow rate that enhances the cutting action of the cutting accessory. Pressure or flow sensors may detect a clog in the suction path.

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Kernville, CA, United States of America

Ryon J Dierck