Cardiothoracic surgery devices and instruments, namely catheters, introducers for placement of catheters, guidewires, occluders, probes, drug delivery catheters, percutaneous vascular access ports, syringes, tubing, trocars, pinch tubes, heart valve prostheses and holders for heart valve prostheses, retractors, forceps, graspers, porous balloons, knives, needle drivers, scalpels, staplers, anastomosis sutures, scissors, sutures, electrocautery scalpels, cannulae, blood filters, external valves and internal valves for occluding the aorta, blood pressure monitoring apparatus, shunts, therapeutic catheters, stents; atherectomy devices, namely, debulking catheters for neurology and neurosurgery used in the treatment of stroke and other diseases and injuries of the cerebral system, cardiopulmonary support and perfusion devices and instrument, 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 valves prostheses 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