1. Surgical system (10) for connecting and / or dissecting body tissue using a surgical instrument (12) having two branches (16, 18) of the instrument, each of which is equipped with at least one RF electrode, the carrier of which is the holder jaws, preferably a tool handle for opening and closing the jaws (16, 18) of the tool, and a cutting element (22), which is simultaneously supported by the jaw holder, preferably the tool handle, separately from the jaws (16, 18) of the tool in which the surgical instrument ( 12) is equipped with a holding means (34) in the form of a locking mechanism of the cutting element, which in an inactive or inoperative state mechanically completely blocks the cutting movement of the cutting element (22) and can be actively turned into an unlocked state to allow cutting movement, and in which active unlocking holding means (34) is only possible when a predetermined tissue connection cycle is completed, preferably when two tool branches (16, 18) are in the open state and / or no electric current is supplied to the RF electrodes on the branches (16, 18) of the instrument. 2. The surgical system (10) according to claim 1, characterized in that the holding means (34) consists of a locking bar or locking pin (36), which is arranged to move at an angle, preferably at right angles, to the direction of movement of the cutting element (22 ), and can be engaged in a recess, preferably in the form of a recess (42) on the cutting element (22) to block the movement of the cutting element. 3. The surgical system (10) according to claim 2, characterized in that it is constipated1. Хирургическая система (10) для соединения и/или рассечения ткани тела с помощью хирургического инструмента (12), имеющего две бранши (16, 18) инструмента, каждая из которых снабжена, по меньшей мере, одним ВЧ электродом, носителем которых служит держатель бранши, предпочтительно рукоятка инструмента для открывания и закрывания браншей (16, 18) инструмента, и режущий элемент
