DEVICE FOR TAKING BIOPSY Russian patent published in 1997 - IPC

FIELD: medical engineering. SUBSTANCE: device has coaxially aligned external cannula and internal stilet with recess for bioptate sample, handle and trigger mechanism. External surface of the working part of the cannula is rough. The recess for bioptate sample has the shape of a cylinder quadrant. The stilet has non-working end bent at right angle and placed inside of hollow cylinder and handle telescopically coupled to it being reciprocally movable with respect to the cannula detachably mounted on the casing. Cylindric rest member is inside the casing having a through slot on its outer side. The handle is hollow rod holder having detachable handle with a ring, spring fixed on its opposite end and placed inside of the casing in coaxial relation with the stilet, two ring-shaped stoppers and a cut. The trigger mechanism has button with dead channel for fixing the bent stilet end and spring member having three protrusions. One of them is engageable with the handle. The second one envelopes the curved end off the stilet. The third one is in the cut of the rod holder. Roughness is non-uniform on the perimeter. EFFECT: enhanced effectiveness of operation; low cost. 2 cl, 2 dwg