Device for fixing biopsy samples for biopsy cannulas intended to perform percutaneous tissue biopsies, especially hard tissue and bone marrow. This biopsy sample fixation device for biopsy cannulas is insertable at the proximal end of the biopsy cannula (4) and can be inserted between the inner wall of the cannula (4) and the cylinder of tissue to be removed, which is removed characterized by the existence of a wire (3) with a sharpening (5) at the distal end of the wire (3) in the biopsy sample fixation device, the wire (3) having a pre-tension angle (2).
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