A needle comprising a hollow shaft having opposed distal and proximal ends, the hollow shaft having a lumen extending from the proximal end of the shaft and terminating at an opening on a top of and proximal to the distal end of the needle shaft. A cutting surface is at the distal end of the hollow shaft...http://www.google.com/patents/US6902547?utm_source=gb-gplus-sharePatent US6902547 - Medical needle
