Erbe Elektromedizin Gmbh

Rolf Weiler

Heiko Schall

Volker Mayer

Achim Brodbeck

Tobias Amann

Klaus Fischer

Peter Selig

Martin Georg Fritz

Lars Blobel

Bernhard Tobias Nold

The instrument comprises a jaw arrangement with two jaws that have, on their side facing the counter-electrode arrangement, rounded or flat electrode surfaces. The counter-electrode arrangement comprises at least one counter-electrode surface that may be rounded or flat. One of the electrode surfaces has a band edge preferably bordered by an insulator on one side, said band edge being adjacent to the adjacent electrode surface of the jaw arrangement. The counter-electrode surface has a band edge adjacent to the insulator facing the band edge of the one electrode surface. The band edges of the electrode surfaces acting as the coagulation surfaces are close enough such that they form cutting edges that develop a cutting effect with low voltages that are otherwise suitable only for coagulation. Accordingly, it is possible to provide fusion instruments that are extremely delicate, display lower thermal inertia and an excellent fusion and cutting effect.

Coagulation and dissection instrument with pin electrodes

A tool () for the coagulation and dissection of biological tissue including a counter-bearing () that has at least one recess () open toward the outside and/or one or more hollow chambers (). The recess () or the hollow chamber () is configured to provide a force/path elasticity characteristic curve with a plateau-like region II, V, during compression and reexpansion. The path section x in which the elasticity characteristic curve indicates the plateau II, IV preferably is as long as the tissue to be dissected is thick, and is, for example, in the range of 0.2 to 1.5 mm. As a result, the force exerted on the tissue during the cutting operation remains substantially constant in the effective work region.

Instrument for grasping, dissecting and/or coagulating biological tissue

An instrument () provided for simultaneous coagulation and dissection of tissue has tissue receptacles between the cutting electrode and the sealing electrode for the formation of tissue bulges to secure the tissue in the tool during the sealing process. In order to make it possible to form voluminous tissue bulges and to prevent their atrophy, the cutting electrode is supplied by a current limiting component, preferably in the form of a coupling capacitor. Thereby, in particular, in tissue that can be cut through easily, but which requires a long time for sealing, a high degree of process safety is achieved.

System for simultaneous tissue coagulation and tissue dissection

The coagulation arrangement () according to the invention comprises an instrument () having a tool () comprising coagulating electrodes (), as well as a dissecting electrode (). The electrodes are powered by a circuit () that comprises a coagulating voltage source () and a dissecting voltage source (), or that can be connected to such sources. The device comprises a dissection actuating switch () and a coagulation actuating switch (). The former is connected to a power switch () that&#x2014;in dissecting mode&#x2014;connects the current path from the dissecting voltage source () to the dissecting electrode (), before the dissecting voltage source () or the HF output voltage source () and the coagulating voltage source () are actuated. Thus, the user is presented with a reliable means in a simple manner in order to be able to more flexibly perform more complex operations.

Coagulation and dissecting instrument with improved control

A sealing instrument () including two branches () with sealing jaws () acted on by a sealing voltage preferably between 80 and 120 volts. Tissue receptacles () are separated from one another by a wall-like extension (), which at its lower edge carries a cutting electrode (), are defined between the branches (). A cutting voltage from 300 to 500 volts is applied between a branch () and the cutting electrode. When the branches are closed the grasped tissue is sealed simultaneously between the sealing jaws (and) and is severed by the cutting electrode (). Even though the tissue is severed completely; for example after 0.3 to 0.5 seconds and the sealing requires more time, the rolls of tissue grasped in the tissue receptacles () act as form-fitting protection of the vessel edges in the tool ().

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Kusterdingen, Germany

Rolf Weiler