Abstract: A deployable retractor (1) with a folded-in configuration and a folded-out configuration is provided. In the folded-out configuration, the refractor (1) forms a completely encased channel (2), and the casing (3) of the channel (2) includes an at least partly double-walled textile (4) that surrounds a fluid interior (6) which has at least one fluid chamber (5) and can be filled with a fluid via a connection (7) and which is emptied in the folded-in configuration and is filled with the fluid in the folded-out configuration.

Abstract: The invention relates to a surgical instrument with a grip area, which has a first handle part, which is fixed in the position of use, and a second handle part, which can be moved relative to the first handle part along an adjustment direction, wherein a ratio between a first distance between the first handle part and the second handle part and a second distance between the first handle part and the second handle part is constant or almost constant in the direction of the first handle part, at least over a partial area of the actuating path, during a movement of the second handle part.

Abstract: The invention relates to a surgical instrument for separating and removing a biopsy. A suction channel for suctioning the biopsy out of a distal region in the direction of a proximal region is formed in a shaft, and/or a cutting tool is formed in one distal region or the distal region of the shaft, said cutting tool having a stationary cutting part and a counter cutting part which can be adjusted relative to the stationary cutting part about a rotational axis formed by a rotary joint wherein the cross-section of the suction channel expands in the suction direction from the distal region to the proximal region and/or the rotary joint is formed by two securing elements, each securing element being introduced from the interior to the exterior.

Abstract: The invention relates to a surgical instrument with a grip area, which has a first handle part, which is fixed in the position of use, and a second handle part, which can be moved relative to the first handle part along an adjustment direction, wherein a ratio between a first distance between the first handle part and the second handle part and a second distance between the first handle part and the second handle part is constant or almost constant in the direction of the first handle part, at least over a partial area of the actuating path, during a movement of the second handle part.

Abstract: A device for severing and removing tissue parts (20), from a body of a living being, by means of a fixed guide rail (1, 30) along which a slide rail (6, 31) is movable, wherein the guide rail (1, 30) and the slide rail (6, 31) form, in the distal region, a cutting or punching mouth (17, 32) for severing the tissue part (20), wherein a conduit (18) for supplying a liquid is assigned to the cutting or punching mouth (17).