Abstract: A device is disclosed for assisting surgical operations inside a vessel, particularly for the minimally invasive explantation and implantation of cardiac valves, comprising an operating structure adapted to be implanted within the vessel, that is adapted to be fixedly and detachably joined to the inner wall of the vessel and is provided with at least one connector and/or support structure for a further instrument required for the surgical operation.

Abstract: A process for separation of dispersions or suspensions by applying an external pressure gradient between a feed reservoir and at least one waste reservoir in such a way that the dispersion flows into a microchannel system. At least one fraction is separated through an opening and via at least one target channel. Different volume flows in a waste channel and a target channel of the microchannel system are set by the selection of an external pressure gradient. The various phases in a dispersion or suspension are separated and concentrated further by a series arrangement of structures of bend arcs. An apparatus for carrying out the process connects the feed reservoir and at least one waste reservoir via a feed channel, at least one bend arc and further channels, respectively, the fractions of the dispersion or the suspension separated substantially within the at least one bend arc.

Abstract: The present invention is related to a method of transforming a pre-determined force or pressure pattern on a lid element through said lid element onto a second element having a planar or non-planar surface. According to a first method step an optimized preformation-shape of said lid element and/or said second element is calculated dependent on the operating parameters of said second element. At least one of said elements is preformed according to said optimized preformation-shape using a primary shaping or reshaping technique. Said lid element is connected to said second element after application of an external force at at least one predetermined force application point by mechanical fastening or generating an adhesive bond between said elements.

Abstract: What is described here is a device for ablation of an aortic valve on the human heart by a minimally invasive surgical operation, comprising a centering and fixing body adapted to be introduced inside the aorta, which can be fixed relative to the aorta via at least one holding means, a drive shaft projecting centrally through said centering and fixing body, at least in part, and presenting a distal end, a cutting device fixedly mounted for rotation on the drive shaft in the region of the distal end of the drive shaft, as well as an aspiration device provided on the proximal side, relative to said cutting means, on said centering and fixing body.

Abstract: A device is disclosed for assisting surgical operations inside a vessel, particularly for the minimally invasive explantation and implantation of cardiac valves, comprising an operating structure adapted to be implanted within the vessel, that is adapted to be fixedly and detachably joined to the inner wall of the vessel and is provided with at least one connector and/or support structure for a further instrument required for the surgical operation.

Abstract: What is described here is a device for assisting surgical operations inside a vessel, particularly for the minimally invasive explantation and implantation of cardiac valves, comprising an operating structure adapted to be implanted within the vessel, that is adapted to be fixedly and detachably joined to the inner wall of the vessel, and is provided with at least one connector and/or support structure for a further instrument required for the operation.

Abstract: What is described here is a device for ablation of an aortic valve on the human heart by a minimally invasive surgical operation, comprising a centring and fixing body adapted to be introduced inside the aorta, which can be fixed relative to the aorta via at least one holding means, a drive shaft projecting centrally through said centring and fixing body, at least in part, and presenting a distal end, a cutting device fixedly mounted for rotation on the drive shaft in the region of the distal end of the drive shaft, as well as an aspiration device provided on the proximal side, relative to said cutting means, on said centring and fixing body.