Experimental comparison of the ultrasonically-activated scalpel to electrosurgery and laser surgery for laparoscopic use

Potential Use of Ultrasound in Creating Transmyocardial Channels

“…The mechanical energy of ultrasound can produce protein coagulum that seals vessels and has nearly the same hemostatic effect on smaller thermal injuries to surrounding tissue as electrocautery. 25,26 In TMLR systems in current clinical use, the myocardium exposed to the laser beam is steamed and the surrounding myocardium is thermally injured by temperatures of a few hundred degrees centigrade. Compared with the laser system, the ultrasonically activated surgical blade has the advantages of portability, reduced cost, and a theoretical potential of reduced thermal injury.…”

High-power low-frequency ultrasound: A review of tissue dissection and ablation in medicine and surgery

“…For denaturation of proteins to occur, a minimum temperature elevation of 4 •C is necessary. Denaturation and coagulation of the protein in sectioned tissue may be desirable in certain applications for closing vascular structures and haemostasis, supporting the cutting process (Amaral, 1994). For vascular applications, Siegel et al (1988) have reported that risk of thermal damage is associated with use of continuous wave energy and vessel perforation.…”

“…No evaluation of the acoustic energy delivered or the mode of interaction was reported. Amaral (1994) has proven the efficacy of a hook-spatula blade for laparoscopic surgery application based on observation effects of cutting and coagulation efficacy in animal studies.…”

“…The metal probe may be solid or tubular, or any configuration. Amaral (1994) describes the use of titanium formanufacture of ultrasonic blades for laparoscopic use. Titanium blades resist cracking and shear forces.…”

Estudo experimental comparativo de métodos de diérese tecidual no tratamento endoscópico do divertículo faringo-esofágico

“…A eletrocirurgia gera calor localizado intenso, que destrói tecidos na dessecção com processo de carbonização 50,51,52 . O bisturi ultrassônico ou harmônico controla o sangramento pela coagulação coaptiva, no qual os vasos são tamponados e selados através de denaturação proteica, dissecção tecidual, ou ambos 53,54,55 .…”