Free QuestionsGeneral Surgery

Harmonic Scalpel

Q. Harmonic  scalpel frequency of vibration is 
A. 20000-50000
B. 50000-80000
C. 80000-100000
D. >100000

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

  1. takes longer time 
  2. produces less smoke
  3. Cause less tissue edema, swelling

Ref : bailey page 49