Soft tissue coring biopsy devices and methods

摘要

An excisional device may comprise a work element configured to rotate at a first rotation rate and comprising a first and a second articulable beak configured to cut tissue. A first helical element, configured to transport tissue cut by the first and second articulable beaks, may be co-axially disposed relative to the work element and operative to rotate at a second rotation rate that is different than the work element. A proximal sheath may be co-axially disposed relative to the work element and the first helical element, and may be configured to rotate the work element and to actuate the first and second articulable beaks.

主权项

1. An excisional device, comprising:
an outer sheath; a work element configured to fit within the outer sheath, the work element defining a proximal portion, a distal portion and a body portion between the proximal and distal portions, the distal portion comprising a first articulable beak that is biased open and coupled to the body portion by a first living hinge, the first articulable beak comprising a first tendon and a first wedge-shaped cutout pointing to the first living hinge disposed on one side of the first living hinge, and a second tendon and a second wedge-shaped cutout pointing to the first living hinge disposed on another side of the first living hinge, the first and second tendons spanning a length of the first living hinge, the first and second wedge-shaped cutouts, and extending proximally beyond a proximal-most end of the first living hinge, the first articulable beak being configured to assume an open configuration operable to core through tissue and, when a proximally-directed force is applied to the first and second tendons, the first articulable beak is configured to assume a closed configuration that presents a curved distal surface configured to cut through tissue without coring.