The present disclosure is directed to a tool that can be used to order, dispense, locate, request and administer medications as well as locate, issue and administer medical items and supplies for patients from a plurality of entry points into the system, e. In real-time, a foregroundbackground separation algorithm is used on the real-time stereo video signal to identify pixels from the stereo video signal that represent the physical foreground object. Accordingly, the damping factor of the overall blade spring or system is constant, so that the damping performance of the blade tensioner can be stabilized.