Abstract: A surgical instrument is for gripping tissue within a body, and includes an actuation device with one grip part movably mounted relative to another in an opening and closure direction and a tool head with two tool parts. One tool part is movable relative to the other along an opening and closure direction. A shank extends between the actuation device and the tool head, with proximal end connected or connectable to the actuation device and distal end connected or connectable to the tool head. The shank includes a transmission axially movable in the opening and closure direction to transmit force from the first grip to the first tool. An overload protection device includes a spring element limiting force transmitted onto the first tool part in the closure direction, and a toggle lever mechanism via which the spring element biases the transmission element in the closure direction.

Abstract: A targeting device (9) for the targeted guidance of a hollow needle (17) with an endoscopic-surgical operation. The targeting device (9) is fastened or can be fastened to an endoscopy unit (1) which extends essentially in an endoscopy longitudinal axis (L) and defines a viewing region (11). The targeting device (9) defines a plurality of hollow needle guides (21). Each of the hollow needle guides (21) each extends towards the viewing region (11) along a different polar angle (?) with respect to the endoscope longitudinal axis (L). Each of the hollow needle guides (21) is open towards one of its two azimuthal sides over its entire length.

Abstract: An intervertebral preparation tool, i.e. a material-removing tool for intervertebral preparation, includes a cutting head (2) which includes at least one movable blade (8) which is held by at least three pivotable levers. The levers (14, 16, 18) are each configured in a rigid manner. A first (14) and a second (16) lever are each articulated at a first articulation point (20) on the blade (8) and at a distanced second articulation point (22) on a carrier element (10) of the cutting head (2), a third lever (18) is articulated at a first articulation point (20) on the blade (8) and at a distanced second articulation point (24) on an actuation rod (26) which is displaceable relative to the carrier element (10). The articulation points (20, 22, 24) are configured as pivot joints with pivot axes which are parallel to one another.