In part, and in addition to apparatus and methods presented, an expansion board to be connecteddisconnected tofrom its mother board easily is provided. The assembly includes an electrically and thermally conductive heat dissipater sandwiched under an electrically insulating layer with circuit traces disposed over the insulating layer to prevent electrical conduction between the traces and the heat dissipater. If any exceptions are detected in the data based on the operator-defined input, output is generated. A plurality of vent orifices are radially disposed about the housing periphery, and normally covered by a resilient band forming a check valve. Also included is an optical modulator configured to alter a pulse width of the fifth optical signal to generate a sixth optical signal. The medical assemblies generally comprise a stent, a catheter assembly having catheter body a balloon, and a releasable connection between the stent and the catheter assembly that releases the stent from the catheter assembly in response to enlargement of the balloon or when the balloon has been enlarged to an expanded configuration.