摘要: Laser energy is absorbed by biological tissues and converted to heat, leading thermal coagulation or vaporization. The depth of tissue injury predictable depends mainly on the wavelength laser light (1, 2), as described elsewhere in this monograph. Moreover, it possible selectively vaporize coagulate discrete volumes abnormal gastrointestinal tract while sparing normal surrounding structures. On other hand, extent necrosis after monopolar electrocautery unpredictable (3), a fact which limits its usefulness treatment neoplasms located within hollow viscera. It precise nature laser-tissue interaction suggests application local GI neoplasms.
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