Cardiothoracic surgery devices and instruments, namely, catheters, introducers for placement of catheters, guidewires, occluders, probes, drug delivery catheters, percutaneous vascular access ports, syringes, tubing, pinch tubes, heart valve prostheses and holders for heart valve prostheses, forceps, graspers, porous balloons, knives, needle drivers, scalpels, staplers, scissors, sutures, electrocautery scalpels, cannulae, blood filters, external valves and internal valves for occluding the aorta, blood pressure monitoring apparatus, porous balloons, shunts, therapeutic catheters, stents, atherectomy catheters, aspirators, atrial isolators, perfusion catheters; neurology and neurosurgery devices, namely, instruments used in the treatment of stroke, ischemia, infarcts, and other diseases and injuries of the central and cerebral nervous system, namely, catheters, heat exchanges and blood pumps; cardiopulmonary support and perfusion devices and instruments, namely, extracorporeal pumps, oxygenators, heat exchangers, switches for changing the flow of blood, stroke treatment prevention devices and instruments namely, catheters, drug delivery catheters, introducers for placement of catheters, guidewires, occluders probes, percutaneous vascular access ports, tubing, trocars, heart valve prosthesis and holders for heart valve prostheses, retractors, forceps, graspers, knives, needle drivers, staplers, scalpels, scissors, sutures, electrocautery scalpels, cannulae, blood filters, external valves and internal valves for occluding the aorta, blood pressure monitoring apparatus, porous balloons, shunts, therapeutic catheters, stents, atherectomy catheters, aspirators, atrial isolators and perfusion catheters