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Comparison of Safety and Efficacy of Ultrasonic and Bipolar Thermal Energy: An Experimental Study

Diamantis, Theodoros MD*; Gialikaris, Spyridon MD*; Kontos, Michael MD; Gakiopoulou, Chariklia MD; Felekouras, Evangelos MD*; Papalois, Apostolos PhD§; Agrogiannis, George MD; Patsouris, Efstratios MD; Bastounis, Elias MD*

Surgical Laparoscopy, Endoscopy & Percutaneous Techniques: August 2008 - Volume 18 - Issue 4 - p 384-390
doi: 10.1097/SLE.0b013e31816f85c9
Technical Reports

The safety and efficacy of the Ligasure-8 Generator with the new Ligasure V 5-mm forceps (Valleylab, Tyco Healthcare) (LS) and the Ultracision Harmonic Scalpel Generator 300 with the new 5 mm 36p Harmonic Ace forceps (Ethicon Endo-Surgery ING) (UC) are compared. Twenty New Zealand rabbits were randomly allocated into 2 groups and the short gastric vessels were divided with either LS or UC. The speed of each method, the number of the times it had to be applied, gastric perforation rates and histopathologic findings were recorded. Approximately the same number of applications was necessary for the 2 groups. UC was significantly faster but resulted in contained perforation in 3 cases against 1 for LS (difference statistically not significant). A tendency for deeper and more severe histopathologic damages was seen with UC. For routine fast dissection, UC is satisfactory, but where prevention of thermal injury is important, LS may be more appropriate.

*Department of Surgery, Laiko University Hospital

Department of Pathology, University of Athens

§Department of Experimental Surgery, ELPEN, Athens, Greece

Breast Unit, Guy's Hospital, London, UK

Reprints: Michael Kontos, MD, Breast Unit, New Guy's House, Guy's Hospital, London SE1 9RT (e-mail:

Received for publication March 16, 2007; accepted January 29, 2008

© 2008 Lippincott Williams & Wilkins, Inc.