Abstract: A training model for endoscopic investigation and the treatment of hollow organs. The training model includes a chamber intended for accommodating the hollow organ with a chamber wall, at least one inlet fastened in the chamber wall with a coupling device to which the hollow organ can be coupled for the introduction of an endoscope through the inlet into the hollow organ, a connection in the chamber wall to which can be coupled a suction pump for the generation of a negative pressure in the chamber and a moulding in the chamber comprising a cavity into which the coupling device opens out and which is adapted to an outer contour of the hollow organ and into which the hollow organ can be inserted. The generation of a negative pressure allows the hollow organ to be widened in accordance with natural conditions.

Abstract: Electrosurgical instrument for the coagulation of biological tissue, wherein from a gas source a noble gas is sent through a tubular probe to at least one outflow opening in a distal end region of the probe, with an electrode device disposed in the distal end region of the probe, which can be connected to an HF source in order to supply a coagulation current, and wherein the at least one outflow opening has a slit-like structure, such that at least two outflow openings are provided, disposed opposite one another with their long axes oriented perpendicular to or at an angle to, but not parallel to a long axis of the probe, and that the probe is flexibly constructed at least in the region of the outflow openings, in such a way that when the probe is bent in the region of the outflow openings, their cross sections are enlarged or reduced.

Abstract: For the coagulation of tissue there are known instruments, in particular probes, that are designed to deliver argon gas into a space between an electrode within the probe and the tissue. In some cases the intention is to coagulate tissues situated at the side of the outlet of the probe. The invention provides an apparatus for coagulating tissue in which the distal end of the electrode projects out of the gas-delivering device or probe, and at said distal end a guiding device for directing and guiding the gas or plasma is disposed in such a way that at least part of the flowing gas or plasma is deflected into a predetermined direction.

Abstract: Electrosurgical instrument for the coagulation of biological tissue, wherein from a gas source a noble gas is sent through a tubular probe to at least one outflow opening in a distal end region of the probe, with an electrode device disposed in the distal end region of the probe, which can be connected to an HF source in order to supply a coagulation current, and wherein the at least one outflow opening has a slit-like structure, such that at least two outflow openings are provided, disposed opposite one another with their long axes oriented perpendicular to or at an angle to, but not parallel to a long axis of the probe, and that the probe is flexibly constructed at least in the region of the outflow openings, in such a way that when the probe is bent in the region of the outflow openings, their cross sections are enlarged or reduced.