Patent ID: 6890308

Claim:
A needle for taking a bone marrow biopsy, comprising: a hollow tube having a main portion and a front end portion, with said front end portion being of a reduced diameter, both internally and externally, when compared with said main portion, wherein a distal end of said front end portion, remote from said main portion, has a multifaceted cutting edge, and a proximal end of said front end portion, in proximity to said main portion, has a tapering portion formed by swaging for providing a frustoconical transition between said front end portion and said main portion with an outer surface of said frustoconical transition including a series of flutes circumferentially around said tapering portion, wherein each flute of said series of flutes has a recess in the outer surface of said frustoconical transition bounded by two cutting surfaces running, at least, part way along a longitudinal axis of said tapering portion, said series of flutes providing a further cutting surface in addition to said multifaceted cutting edge at said distal end of said front end portion.