Importance

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Abstract

A biopsy device includes a flexible distal portion for obtaining a biopsy sample from a biopsy site. The device includes a coring cannula with a wall defined between a proximal end and a distal end and defining a lumen therebetween. The wall of the cannula defines a coring relief notch adjacent the distal end has a length along a longitudinal axis of the cannula longer than a diameter of the coring cannula. A wire is slidably disposable within the lumen of the coring cannula and has a proximal end and a distal end and defines a sampling cavity adjacent the distal end. A wire relief notch is positioned adjacent the sampling cavity. The wire relief notch has a length along a longitudinal axis of the wire longer than a width of the wire relief notch. A firing mechanism is engaged to the proximal ends of the coring cannula and the wire and the firing mechanism is operable to move the coring cannula relative to the wire from a second position to a first position to trap tissue from the biopsy site in the sampling cavity. The wire is slidable relative to the coring cannula between the first position retracted within the lumen so that the coring cannula covers the sampling cavity and a second position wherein the distal end of the wire is extended away from the coring cannula to expose the cavity to tissue in the biopsy site.

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First Claim