A disposable tissue removal device comprises a “tube within a tube” cutting element mounted to a handpiece. The inner cannula of the cutting element defines an inner lumen and terminates in an inwardly beveled, razor-sharp cutting edge. The inner cannula is driven by both a pneumatic rotary motor...http://www.google.fr/patents/US20050113715?utm_source=gb-gplus-shareBrevet US20050113715 - Biopsy apparatus
