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The design of a new radio-frequency scalpel is developed for a resection of the parenchymatous organs allowing considerably to improve uniformity of coagulation of a tissue and to reduce time of carrying out of operation.

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Surgical resection remains the most effective treatment for liver tumors but it can still be limited by blood loss which can affect postoperative recovery and long-term survival. New approach towards achieving bloodless resection is the use of heat coagulative necrosis in healthy liver tissue, creating a zone of necrosis with help of monopolar or bipolar linear array of needle electrodes which are connecting with radio frequency generator. Resection of liver can be performed by usual scalpel.Unfortunately appreciable hemorrhages are possible after excising part of tissue because of incomplete coagulation.To solve problem new electrodes system of monopolar linear array of electrode needles with special flat scalpel has been designed Comparison of efficiency of known and offered devices was spent at resection of liver of the big not purebred dogs in department of surgery FMBC of A.I. Bumazj ana.The bloodless volume at use of the offered device has appeared on the average on 30 % less, than at use of the known device.

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