Harmonic Scalpel 2021-02-212018-03-15 by admin Spread the loveQ. Harmonic scalpel frequency of vibration is A. 20000-50000 B. 50000-80000 C. 80000-100000 D. >100000 Answer A a 20K to 50 k Hz Read about techniques of liver resection here Harmonic scalpel cuts through tissues and causes coagulation by protein denaturation caused by vibrating force. As compared to cautrey harmonic scalpel takes longer time produces less smoke Cause less tissue edema, swelling Ref : bailey page 49