Device for reliably performing a biopsy, in particular a bone-marrow biopsy

Abstract

A device for performing a biopsy, in particular a bone-marrow biopsy, comprises a needle (1) provided with a handgrip (2) and a cannula (3) housing a mandrel (5) movable within the cannula bore (4). The handgrip (2) comprises a chamber (26) arranged coaxially with the cannula (3) and having two opposing ends, one (28) hermetically sealed and located in an edge (27) of the handgrip (2) and the other communicating with the bore (4) of the cannula (3), in correspondence with this latter there being provided interception means (11) operable from the outside of the handgrip (2) to lock the mandrel (5) within the cannula (3) during the insertion of the needle (1) into the patient but to enable the mandrel to move during the performing of the biopsy, the tissue which penetrates into the cannula (3) acting on the mandrel (5) to move the free end (8) of this latter into the chamber in the handgrip (2), said movement being measurable and providing confirmation that the biopsy has taken place and of the quantity of tissue which has penetrated into the cannula.

Dependencies are inferred from the claim text.