BIOPSY NEEDLE Russian patent published in 1997 - IPC

FIELD: medical engineering. SUBSTANCE: device has hollow tube and mandrin, external tube and cannula. The mandrin, internal tube, external tube and cannula are mounted coaxially. Their operation ends are sharpened in the form of leaflets with rounded cutting ends beveled with respect to the working edge and forming four-step pyramid having lateral sides inclined at an angle of 15-30 deg to the needle axis. Non-working ends are provided with connection members set in series one inside another. EFFECT: simplified design; taking several samples at a time; ultrasonic control of needle position.