Dual action aspiration biopsy needle
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United States of America Patent
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Issued Date -
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app pub date -
Aug 9, 2001
filing date -
Aug 9, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A dual action biopsy needle collects tissue from a lesion during forward and rearward reciprocations of the needle along its longitudinal axis of symmetry. A first cutting edge, formed by a beveled distal end of the needle, slices tissue during proximal-to-distal travel of the needle. A second cutting edge is provided by a transversely disposed slot formed in the needle near the first cutting edge. The second cutting edge slices tissue from a lesion during distal-to-proximal travel of the needle. In a first embodiment, the second cutting edge is coincident with an exterior surface of the needle. In a second embodiment, the second cutting edge is elevated with respect to the exterior surface and in a third embodiment the second cutting edge is recessed. Additional embodiments include a second slot, a channel, and a hinge for enabling pivotal movement of the second and third cutting edges.
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