Which device uses mechanical energy converted to high-frequency ultrasonic vibration to cut tissue?

Which device uses mechanical energy converted to high-frequency ultrasonic vibration to cut tissue?

• A. Bipolar cautery
• B. Ultrasonic dissection
• C. Laser scalpel
• D. Water jet

Answer: (B)

Ultrasonic dissection uses mechanical energy converted to high-frequency ultrasonic vibration to cut tissue. The handpiece houses a transducer that turns electrical energy into rapid, high-frequency blade motion (around 50–60 kHz). This vibrating blade mechanically shears tissue as it moves, allowing precise dissection along natural planes. Heat from friction at the tip provides some coagulation, giving hemostasis with minimal thermal spread. Because the action is mechanical vibration at the tip rather than electrical current through tissue, photons, or a water jet, this distinguishes ultrasonic dissection from the other devices.

Ultrasonic dissection uses mechanical energy converted to high-frequency ultrasonic vibration to cut tissue. The handpiece houses a transducer that turns electrical energy into rapid, high-frequency blade motion (around 50–60 kHz). This vibrating blade mechanically shears tissue as it moves, allowing precise dissection along natural planes. Heat from friction at the tip provides some coagulation, giving hemostasis with minimal thermal spread. Because the action is mechanical vibration at the tip rather than electrical current through tissue, photons, or a water jet, this distinguishes ultrasonic dissection from the other devices.