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