Dual action aspiration biopsy needle

Details Dual action aspiration biopsy needle Dual action aspiration biopsy needle

2005-03-29

2005-03-29

Marmor, Charles (Department: 3736)

Surgery

Diagnostic testing

Sampling nonliquid body material

C600S571000, C600S562000, C600S576000, C606S160000, C604S022000

Reexamination Certificate

active

06872185

ABSTRACT:
A biopsy needle scrapes tissue of cellular thickness 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.

REFERENCES:
patent: 4702260 (1987-10-01), Wang
patent: 5394887 (1995-03-01), Haaga
patent: 5560373 (1996-10-01), De Santis
patent: 5843111 (1998-12-01), Vijfvinkel
patent: 5957864 (1999-09-01), Oosterhof

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