The invention relates to a positioning device (50) for positioning a plurality of tubular elements (1, 1a, 1b, 1c), in which each of the tubular elements (1, 1a, 1b, 1c) is coupled to at least one sensor and / or
actuator device (10a, 10b, 10c), measurement data (La, Lb, Lc) being obtainable at a distal tip (6, 6a, 6b, 6c) of the tubular elements (1, 1a, 1b, 1c) and being transmittable to the at least one sensor device (10a, 10b, 10c), the tubular elements (1, 1a, 1b, 1c) are movably connected to proximal positioning elements (2, 2a, 2b, 2c) facing or at the base (5) of the plurality of tubular elements (1, 1a, 1b, 1c), the tubular elements (1, 1a, 1b, 1c) being arranged on the base (5), in particular in a
grid pattern, and / or a point-by-point action being carried out by at least one
actuator device, the tubular elements (1, 1a, 1b, 1c) being movably connected to proximal positioning elements (2, 2a, 2b, 2c) facing or at the base (5) of the plurality of tubular elements (1, 1a, 1b, 1c), the tubular element (1, 1a, 1b, 1c) further comprises a distal positioning element (3, 3a, 3b, 3c) remote from the proximal positioning element (2, 2a, 2b, 2c), the tubular element (1, 1a, 1b, 1c) being more rigid than the positioning element (2, 2a, 2b, 2c, 3a, 3b, 3c) or a region surrounding the positioning element (2, 2a, 2b, 2c, 3, 3a, 3b, 3c), at least one of the positioning elements (2, 2a, 2b, 2c) being connected to at least one manipulation device (4, 4a, 4b, 4c) for the space of the tips (6, 6a, 6b, 6c) of a plurality of tubular elements (1, 1a, 1b, 1c). The invention also relates to a measurement process.