cardiothoracic surgery devices and instruments, namely catheters, introducers for placement of catheters, guidewires, occluders, probes, drug delivery devices, percutaneous vascular access ports, syringes, tubing sets, trocars, pinch tubes, heart valve prostheses and holders for heart valve prostheses, retractors, forceps, grapers, porous balloons, knives, needle drivers, scalpels, staplers, anastomosis devices, scissors, sutures, electrocautery devices, cannulae, blood filters, blood filter systems, external valves, internal valves, pressure monitoring gauges, porous balloons, shunts, therapeutic catheter systems, stents, atherectomy devices, aspirators, atrial isolators, tissue supports, sealing devices, perfusion devices, neurology and neurosurgery devices, namely instruments used in the treatment of stroke, ischemia, infarcts, and other diseases and injuries of the central and cerebral system, cardiopulmonary support and perfusion devices and instruments, namely extracorporeal pumps, exgenators, heat exchangers, monitoring equipment, switches, stroke treatment prevention devices and instruments namely catheters, drug delivery devices, introducers for placement of catheters, guidewires, occluders, probes, percutaneous vascular access ports, tubing sets, trocars, heart valve prostheses and holders for heart valve prostheses, retractors, forceps, graspers, knives, needle drivers, staplers, scalpels, scissors, sutures, electrocautery devices, cannulae, blood filters, blood filter systems, external valves, internal valves, pressure monitoring gauges, porous balloons, shunts, therapeutic catheter systems, stents atherectomy devices, aspirators, atrial isolators and tissue supports, sealing devices and perfusion devices