In terms of the prevention of rebleeding from peptic ulcers, endoscopic bipolar electrocoagulation has been shown to be superior to both the injection of alcohol or no treatment at all.
The rapid changing of voltage in the electrode at the tip of an endoscope is highly effective at heating a very small target area. The fact that contact is made - unlike laser treatment - results in a more localised dispersion of energy, and hence smaller blood vessels may be sealed.
Water irrigation of the electrode is required to permit cooling and to keep the field of vision clear.
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