A percutaneous tissue removal apparatus having a flexible drill shaft, a cutting tip mounted on the shaft a power source for transmitting motion to the shaft to move the cutting tip against tissue and a suction source for removing tissue fragments along the shaft to a location outside the tissue mass...http://www.google.ca/patents/US6990982?utm_source=gb-gplus-sharePatent US6990982 - Method for harvesting and processing cells from tissue fragments
