10 medical devices and instrumentation, namely, conductance systems comprised of control units, a computer, cables, software, and catheters with sensors and/or electrodes; devices and instrumentation, namely, conductance systems, control units, and catheters, for the measurement of physiological data, namely, data related to pressure, volume, blood flow, temperature, velocity, conductance, respiration, and chemistry; and devices and instrumentation, namely, conductance systems, control units, and catheters, for use in clinical and research applications in a variety of medical fields, namely, the cardiovascular, gastrointestinal, urologic, renal, intercranial, optical, intravascular, pediatric, and neo-natal fields