Ultrasonic surgical blade, waveguide and ultrasonic scalpel thereof

Abstract

An ultrasonic surgical blade, wherein the blade has a curved shape, and both sides of the blade are provided with cutting surfaces, one surface is a concave surface and the other surface is a convex surface. The thickness of the blade is gradually thinned along a cutting direction from a proximal end to a distal end. The concave surface length is set as L1, the radius of curvature R1; the length of the convex surface L2, the radius of curvature R2; the angle of the bending of the center line of the blade is α; the diameter of the proximal end of the blade is D; the thickness of the most distal end surface of the blade is T. The relationship among them is: L1=L2+L2/1.5*(D−T)*SIN(α) (1), R1=R2+2T (2). The range of each size is adjustable within 10%. An ultrasonic wave guide and an ultrasonic scalpel using this blade have fewer potential resonant frequencies, so the thermal damage to the tissue is small, and the performance is more stable.