Patent ID: 8728008
Filing Date: 2014-05-20
Classification: A61B

Abstract:
1. A bone marrow aspiration assembly comprising: an outer cannula extending along a first longitudinal axis, the outer cannula including a first outer surface and a first inner surface, the first inner surface defining a first passageway extending along the first longitudinal axis, the outer cannula defining a plurality of outer openings that are in communication with the first passageway, that extend between the first inner and first outer surfaces of the outer cannula, and are arranged in distal, intermediate, and proximal groups along the first longitudinal axis; and an inner cannula extending along a second longitudinal axis that is configured to be received in the first passageway, the inner cannula including a second outer surface and a second inner surface, the second inner surface defining a second passageway extending along the second longitudinal axis, the inner cannula defining a plurality of inner openings that are in communication with the second passageway, that extend between the second inner and second outer surfaces of the inner cannula, and are arranged in distal, intermediate, and proximal groups along the second longitudinal axis; wherein the inner cannula is moved only radially about the second longitudinal axis with respect to the outer cannula to selectively align the inner openings of only one of the distal, intermediate, and proximal opening groups of the inner cannula with the outer openings of only one of the distal, intermediate, and proximal opening groups of the outer cannula to permit aspiration therethrough.