An integrated centrifugal blood pump-oxygenator which has a housing with a top having a blood inlet, a blood outlet and a gas inlet, and a bottom having a rotational body being rotatably arranged in a rotor-housing of the bottom. A head of a longer nail is rested on the first ridges and the shank of the longer nail extends through a distance between the two first ridges. , a data signal or a timing signal, from a logic circuit, for example a memory device.