The MECC SYSTEM is a compact extracorporeal circulation system with a significantly reduced amount of priming volume and blood surface contact area. The system comprises catheters, cannulae, disposables and hardware, being an integrated package of just the essential components. There is no need for an external venous reservoir, there is a considerable reduction in the priming volume, and the cardiotomy suction has been separated. The closed system with its minimized perfusion solution offers less hemodilution, reduced inflammatory response and less blood trauma. These features combine to make the MECC SYSTEM a high performance device delivering improved perfusion solutions for patients with optimum safety.