| 主权项 |
1. A tissue-sampling tool made in the form of a one-piece tube without any moving parts, the tube presenting an inside face of circular section and an outside face of circular section, the tube having a rounded or hemispherical distal end and at least one sampling orifice extending symmetrically relative to a transverse plane and to a longitudinal plane, the orifice being peripherally bordered by two transverse borders that are symmetrical relative to the transverse plane and that are connected to two longitudinal borders that are symmetrical relative to the longitudinal plane, wherein:
each transverse border possesses a cutting edge situated at the intersection between said borders and the inside face, each transverse border co-operating with the inside face to form a cutting angle lying in the range 6° to 18°; and each transverse border having a bevel surface extending from the cutting edge to an outer surface portion of the one-piece tube, the bevel surface and the inside face forming the cutting angle, and the longitudinal borders are arranged to have a cup-shape relative to the transverse borders, with a profile in the longitudinal plane that is different from the profile of the transverse borders, the difference in the profile of the longitudinal borders and the profile of the transverse borders forming a profile discontinuity, wherein a change in surface orientation occurs where each transverse border and each longitudinal border connect. |
