Patent ID: 8070690
Filing Date: 2011-12-06
Classification: A61B

Abstract:
1. A bone marrow harvesting drill comprising: an inner needle having a cutting edge and a shank at a tip and a rear end thereof, respectively; a tubular mantle that receives the inner needle thereinto so that the inner needle and the tubular mantle are detachably attached in such a manner that the tip and the rear end of the inner needle project from the tubular mantle; and a lock mechanism that prevents the axial rotation of the tubular mantle and the inner needle relative to each other; the inner needle having a groove formed at the tip thereof projecting from the tubular mantle when the inner needle is inserted into the tubular mantle for discharging bone scraps produced by the cutting edge at the tip of the inner needle; the tubular mantle having a cutting edge formed at a tip edge thereof and a helical groove extending from the tip edge of the tubular mantle to at least part of a peripheral surface of the tubular mantle so as to be flush with the groove of the inner needle, the helical groove having a depth that is less than a thickness of the tubular mantle; and at least part of a leading edge of the helical groove being formed as a concave notch.