Patent ID: 6210410
Filing Date: 2001-04-03
Classification: A61B

Abstract:
Coagulation apparatus comprisingan endoscope working channel with a proximal opening and a distal opening and an inner surface extending between the proximal and distal openings;a current-supply device with a conductor to conduct a coagulation current from a source to a discharge section at a distal end of the conductor;a gas-supply conduit to guide gas from a gas source to a space between the discharge section and a portion of tissue to be coagulated;a protective device at the discharge section to prevent a damaging direct flow of current between the discharge section and the portion of tissue to be coagulated;wherein the gas-supply conduit is formed by the endoscope working channel, and the conductor passing through the endoscope working channel and having an outer insulating layer, which is spaced radially inwardly from the inner surface of the endoscope working channel at least in the vicinity of the distal opening, the distal end of the conductor projecting out of the distal opening with its distal end and its discharge section, in such a way that gas emerging through the distal opening flows around the distal end of the conductor and the discharge section as it passes into the space between the discharge section and the portion of tissue to be coagulated.