What causes Johnson ultrasonic knife to reduce head pressure

The original is damaged. Johnson ultrasonic knife head is a universal interface efforts to improve the efficiency of the setup, Johnson ultrasonic knife pressure is reduced because of the original damage caused by the teardrop design to ensure that only the direction of the instrument can be inserted. Johnson Harmonic ultrasonic knife handle ultrasonic knife is known as "ultrasonic cutting hemostasis knife", is a new type of clinical surgical equipment. The ultrasonic knife system consists of a mainframe, handle, instrument (head), and footswitch.