Excellent review on the physical principles of precise sect technology and its application in ESD and POEM by Dr. Torsten Beyna and Dr. Roberta Maselli. The precise sect mode regulates itself according to the impedance of the tissue, which in turn is related to the contact surface of the knive with it. Thus, for the precoagulation of medium-sized vessels (0.5-1.5 mm), it is necessary to expose a wide contact surface of the knive on the sides of the vessel (once it has been properly dissected) and press the coagulation pedal during 1-2 seconds. When the vessels are smaller and are not arterial, they can be coagulated with a wide contact surface of the scalpel, without pressing it and pressing the blue pedal for 1-2 seconds.

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