A lifting jack arrangement for lifting platforms. The primary handle includes first and second legs, each of which has a first end that is securable to a tool head such that the first and second legs extend outwardly from the tool head in generally parallel relation to one another. In the trailer mode, the cart-trailer may be coupled to a movable object by a collapsible, length adjustable tow bar. A simulated heart and simulated lungs are arranged within the torso and are visible through the front surface of the torso. A stent is subsequently deployed within the expanded sheath and the sheath is then withdrawn from within the vasculature to leave the stent expanded against the arterial wall with the plaque entrapped therebetween.