Patent ID: 6758824
Filing Date: 2004-07-06
Classification: A61B

Abstract:
A tissue cutting device comprising:an outer cannula defining an outer lumen and a tissue-receiving opening adjacent a distal end of said outer cannula communicating with said outer lumen; an inner cannula slidably disposed within said outer lumen and defining a inner lumen from an open distal end to an open opposite proximal end, said inner cannula defining a cutting edge at said open distal end operable to sever tissue projecting through said tissue receiving opening; a first hydraulic rotary motor operably coupled to said inner cannula to rotate said inner cannula within said outer cannula; a second hydraulic reciprocating motor operably coupled to said inner cannula to translate said inner cannula within said outer cannula while said inner cannula rotates; and a hydraulic system connecting said first and second hydraulic motors to a source of pressurized fluid.