Intermediate
Technical
IVT
harmonic scalpel
An ultrasonic surgical device that uses high-frequency vibrations to cut and coagulate tissue simultaneously during laparoscopic procedures.
Full Definition
The harmonic scalpel is an ultrasonic surgical instrument that operates at 55,500 Hz to cut and coagulate tissue through mechanical vibration rather than electrical energy. The device converts electrical energy to ultrasonic vibrations through a piezoelectric transducer, causing tissue proteins to denature and form a coagulum. This technology offers precise tissue dissection with minimal thermal damage to surrounding structures, making it particularly valuable in laparoscopic surgery.
Usage
Usage note: Brand name often used generically for ultrasonic surgical devices.
In Context
- "The surgeon used the harmonic scalpel to achieve hemostasis during the laparoscopic liver resection." — Operative report
- "Harmonic scalpel technology reduces smoke production compared to traditional electrocautery." — Equipment comparison study
Also known as
ultrasonic scalpel
harmonic device
Contrasted with
electrocautery
Don't confuse with
LigaSure device