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Dans un instrument ultrasonique, l'energie electrique est transformee en vibration mecanique qui est transmise a la pointe de l'instrument. En pincant un vaisseau entre la lame inactive et la lame vibrante, une chaleur par frottement est produite. Cette chaleur, significativement moins elevee que celle generee par l'electrocoagulation, est ideale pour coaguler un vaisseau. La vibration ultrasonique...
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