Prior continuous discharge centrifugal concentrators for separating higher density particles from a slurry have used pinch valves to control the flow of discharge. A test vehicle carries the elongated test compartment, and travels to the on-site location to test the workpiece. The device also includes a tissue harvesting tip formed on the distal end of the shaft that is effective to excise a tissue sample when the shaft is moved to the distal position, and a cutting member that is coupled to the shaft at a position proximal to the tissue harvesting tip. The semiconductor die, the substrate array, the wire bonds and the heat spreader are molded into a molding material to provide a molded package. The transparent CNT electrode can be used to fabricate a variety of devices, including image sensors, solar cells, liquid crystal displays, organic electroluminescence displays and touch screen panels, that are required to have both light transmission properties and conductive properties. Securement means is provided to secure the outer periphery of the membrane in direct engagement with the atrial wall surrounding the ostium.