Dual action aspiration biopsy needle
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United States of America Patent
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Jun 21, 2005
Issued Date -
N/A
app pub date -
Mar 19, 2004
filing date -
Aug 9, 2001
priority date (Note) -
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Abstract
A biopsy needle scrapes tissue of cellular size from a lesion during repeated proximal-to-distal thrusts of the needle along its longitudinal axis of symmetry. A first sharp edge, formed by a beveled distal end of the needle, scrapes tissue during proximal-to-distal travel of the needle. A second sharp edge is provided by a transversely disposed slot formed in the needle near the first sharp edge. The second sharp edge also scrapes tissue during proximal-to-distal travel of the needle. The second sharp edge may be coincident with an exterior surface of the needle, elevated with respect to the exterior surface, or recessed with respect to the exterior surface. Another embodiment includes a hinge for enabling pivotal movement of the second sharp edge.
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