Patent ID: 7179232

Claim:
A bone marrow sampling device, comprising: an outer cannula having a sidewall with an outer surface that forms the outer most exterior surface of the device, the sidewall defining an inner lumen and a closed distal end with a tissue penetrating tip, the sidewall having a plurality of openings formed at least at a distal portion of the outer cannula thereof, the openings being spaced apart at different radial and longitudinal positions on the sidewall, wherein each opening is in fluid communication with the inner lumen of the outer cannula; an inner cannula having a sidewall defining an inner lumen, the inner cannula being adapted to be disposed within and mated to the outer cannula such that the outer cannula and inner cannula are selectively moveable with respect to each other; and at least one opening formed in the sidewall of the inner cannula, wherein selective relative movement of the inner cannula and the outer cannula enables the device to be configured in multiple bone marrow sampling modes in which the at least one opening in the sidewall of the inner cannula is aligned with different openings in the sidewall of the outer cannula such that bone marrow can be drawn into the inner lumen of the inner cannula from different radial and longitudinal positions external to the sidewall of the outer cannula without the need to reposition the outer cannula.