Thin-needle biopsy cannule with a mandrel

Abstract

Abstract The biopsy instrument (10) essentially comprises a cannula (11) and a mandrel (17) which is arranged in the cannula (11) and is connected to the piston of an aspiration syringe. The tip (28) of the cannula is provided with a bevelled joint (12), and the mandrel (17) is also provided with a bevelled joint (18). The bevelled joints (12,18) are oriented in the same direction and their orientation is fixed. The bevelled joint (12) of the cannula (11) is provided with a facet joint (16) with a clearance produced by grinding (13), and the mandrel (17) is provided with a facet joint (20), which together form a common functionally uniform cutting edge (45). <IMAGE>

Inventors

• 👤 Heiko Dr. Lübbers

Bibliographic Details