A sterile, pen-like device intended to be used to manually manipulate a heart valve prosthesis to perform an assessment of the valvular prosthesis (e.g., its ability to open and close) prior to implantation and/or when in situ. It typically has a handle made of plastic and a soft tip (e.g., made of rubber) to prevent damage of the valvular prosthesis. This is a single-use device.