MEDICAL CUTTING DEVICE Russian patent published in 1998 - IPC

FIELD: medical engineering. SUBSTANCE: device has casing 1 provided with spatial orientation means 2 being a part of casing 1 or a part of nozzle 16 or engine or casing with electric motor or handle directed at an angle to longitudinal axis of drive shaft 5. The longitudinal axis of spatial orientation means 2 passes through the device center of gravity or through an axis passing through the center of gravity. Drive 3 has transmission 4 having drive shaft 5 and protection unit 6 for disk knife 7 or disk knife 8 having toothed segments 9 on cutting edge 10 or disk knife 11 having toothed projections 12 on edge 13 mounted on drive shaft 5. Disk knife 7 or disk knife 8 having toothed segments 9 on cutting edge 10 or disk knife 11 having toothed projections 12 on edge 13 have minimum thickness of cross-section being equal to 0.01-10 mm and additional installation surface 18 made for instance as turning 19 for disk chuck 15. Turning 19 exceeds maximum size of disk chuck 15 in diameter and is 0.9 times diameter of operation circle of knife 7, 8 or 11. Disk knife 8 having toothed segments 9 on cutting edge 10 or disk knife 11 having toothed projections 12 on edge 13 has distance between toothed segments 9 or toothed protrusions 12 depending on properties and number of teeth and on length of operation circle of knife to be calculated from formula A=B-C*D, where A is the distance between the toothed segments or protrusions, B is the length of knife operation circle, C is the number of teeth on a segment or the number of teeth on toothed protrusions, D is the maximum width of one tooth. Means 14 for controlling thickness of sliced layer together with nozzle 16 and knives 7, 8 and 11 enable atraumatic cutting tissues of any type and given thickness. EFFECT: improved control; simplified structure. 6 cl, 6 dwg