Biopsy needle assembly
 A bone marrow biopsy needle assembly includes an elongated tubular cannula having an axially extending lumen therethrough, and a cannula handle attached to the proximal end of the cannula, the cannula handle extending transversely to the axis of the cannula and having a cavity aligned with and open to the proximal end of the cannula. The handle is provided with a cover connected to the cannula by means of a living hinge. A stylet having a knob affixed to its proximal end which knob is sized to fit within the cavity with the stylet slidably received within the cannula lumen. The cavity is provided with projections that engage the knob to prevent relative rotation between the stylet and the cannula. A guide is provided to facilitate insertion of a stylet into the cannula for sample removal. 
Baxter International, Inc.
A A
A61B A61B
additional inventional
Stephen David A. John R. Jan L. Gregory D. T. Michael Terrence W.
Kuehn Winchell, deceased Byrne Como Volan Dennehey Snyder