Patent ID: 7776012
Filing Date: 2010-08-17
Classification: A61M

Abstract:
1. A device for medical use, of the prefilled ready-to-use syringe type, comprising: a tubular body comprising, at its distal end, a tip configured to receive a needle and, at its proximal end, a piston configured to slide inside the said tubular body, the piston being arranged in an initial position with respect to the tubular body and defining an internal working volume at least partially filled with a medicinal liquid, the piston being connected to a rod for actuating the piston, wherein the tubular body is provided, on its internal face, with a means of detecting the movement of the piston, the means being situated between and spaced apart from both the initial position of the piston and the proximal end of the tubular body and being separate from the piston, and being in the form of at least a partial coating of the internal face of the tubular body with a material that can be altered by at least one of shear and friction.