Method for scraping cellular material from tissue

Details Method for scraping cellular material from tissue Method for scraping cellular material from tissue

2005-05-10

2005-05-10

Marmor, Charles (Department: 3736)

Surgery

Diagnostic testing

Sampling nonliquid body material

C600S571000, C600S562000, C600S576000, C606S160000, C604S022000

Reexamination Certificate

active

06890309

ABSTRACT:
A dual action biopsy needle scrapes tissue of cellular thickness from a lesion during forward and rearward reciprocations 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 scrapes tissue during distal-to-proximal travel of the needle. In a first embodiment, the second sharp edge is coincident with an exterior surface of the needle. In a second embodiment, the second sharp edge is elevated with respect to the exterior surface and in a third embodiment the second sharp edge is recessed. Additional embodiments include a second slot, a channel, and a hinge for enabling pivotal movement of the second and third sharp edges.

REFERENCES:
patent: 4693257 (1987-09-01), Markham
patent: 5843111 (1998-12-01), Vijfvinkel
patent: 6656132 (2003-12-01), Ouchi
patent: 6709408 (2004-03-01), Fisher

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