ultrasonic surgical blade, waveguide and ultrasonic scalpel

摘要

the present invention relates to an ultrasonic surgical blade, having a curved shape with both sides provided with cutting faces, that is, a concave face (71) and a convex face (72). the thickness of the blade gradually decreases along the direction of the cut, from the proximal to the distal end. the relation is l1 = l2 + l2 / 1.5 * (dt) * sin (¿) (1), r1 = r2 + 2t (2), where: l1 is the length of the concave face and r1 is its radius of curvature ; l2 is the length of the convex face and r2 is its radius of curvature; a is the flexion angle of the blade's central line; d is the diameter of the proximal end of the blade; and t is the distal thickness of the blade. the range of each size is adjustable by 10%. the ultrasonic waveguide and the ultrasonic scalpel with this blade have less potential resonant frequencies; therefore, thermal damage to the fabric is small and performance is more stable.