Dispositivo de extirpación de tejido con elevada velocidad de movimiento de vaivén

Un dispositivo de extirpación de tejido (6), que comprende: un tubo externo alargado (76), que tiene un extremo proximal, un extremo distal (81) y una ventana lateral (89), teniendo la ventana lateral (89) una longitud orientada longitudinalmente; y un tubo interno alargado (411), situado dentro del tubo externo (76), y móvil para abrir y cerrar la ventana lateral (89); caracterizado porque el tubo interno (411) comprende una punta distal (415) unida a un vástago proximal (413), teniendo dicha punta distal (415) un borde cortante para cortar tejido que se extiende al interior de la ventana lateral (89); la punta distal (415) tiene una dureza que supera la dureza del material del vástago proximal (413), una luz axial de la punta distal (415) está en comunicación fluida con una luz axial del vástago proximal (413), y un diámetro externo de la punta distal (415) es mayor que un diámetro externo del vástago proximal (413). Disclosed is a tissue removal device. The device includes an outer tubular body, an inner tubular body and a cutting edge on the inner tubular body. The outer tubular body includes a window, which may be opened or closed by moving the cutting edge. The cutting edge has a hardness that exceeds the hardness of the material of the inner tube. The cutting edge may have a Rockwell C hardness of at least about 50, while the inner tube has a Rockwell C hardness of no more than about 40. The cutting edge may be formed by a milling step, and the inner tube may be formed by a drawing step. Tissue severed by the cutting edge may be removed at a rate of at least about 1.8 grams per minute through the inner tube, and the outer tubular body may have an outside diameter of no more than about 3.5 mm.