Abstract: A biopsy device includes an elongate tube comprising a distal end, a proximal end, and a lumen. The biopsy device further includes a cutting member disposed in an opening of the distal end of the elongate tube, the cutting member being immovable relative to the elongate tube. The cutting member comprises a blunting surface that faces outward from the elongate tube, and a hollow truncated cone having a truncated end comprising a cutting surface that maintains a fixed radial distance from the elongate tube and that faces into the elongate tube and away from the distal end of the elongate tube, wherein the cutting surface has a contiguous perimeter, and wherein the truncated end is angled relative to a longitudinal axis of the elongate tube such that the cutting member has a shape of a right circular hollow cone or an oblique oval hollow cone.

Abstract: An endoscopic biopsy device is configured to collect multiple samples from a body without removal of the device from the body. The device includes; an elongate tube of having a distal end, a proximal end, and a lumen extending from the distal end to the proximal end. The device includes a cutting element disposed in an opening of the distal end, the cutting member being immovable relative to the elongate tube and comprising a cutting surface that faces into the elongate tube and away from the distal end of the elongate tube and a blunting surface that faces outward from the elongate tube. The device further includes a valve disposed proximate to the proximal end.