Harmonic scalpel
An ultrasonic surgical device that cuts and coagulates tissue simultaneously using high-frequency vibrations.
Full Definition
The Harmonic scalpel is an advanced electrosurgical instrument that uses ultrasonic technology to cut and coagulate tissue simultaneously. Operating at 55,500 Hz, the device causes rapid cellular vibration that denatures proteins and creates coagulation with minimal thermal spread. This technology produces less smoke and char compared to traditional electrocautery, provides excellent hemostasis, and allows precise dissection with reduced collateral tissue damage. The Harmonic scalpel is particularly valuable in laparoscopic procedures where smoke evacuation is limited and precision is crucial.
Usage
Usage note: Brand name should be capitalized; generic term is 'ultrasonic dissector'.
In Context
- "The Harmonic scalpel was used for precise dissection of the gallbladder from the liver bed." — Operative report
- "Mesenteric vessels were divided using the Harmonic scalpel with excellent hemostasis." — Surgical procedure note