Abstract: The centrifugal blood pump has a pump rotor (15) arranged inside a housing (13) which is closed with the exception of a blood outlet (15') and a blood inlet (14). The rotatable pump rotor (15) inside the housing (13) is driven by an external drive motor (10) via a magnetic coupling. The magnetic coupling is provided by thin exterior permanent magnets (21) circumferentially distributed around the rotor (15) on a coupling part (12,20) connected to the external drive motor (10) and correspondingly thin circumferentially distributed permanently magnetized ferromagnetic regions (17,18) of the pump rotor which are coupled with the permanent magnets (21) to form a magnetic field bridge (22) and thus to avoid axially directed tilting or tipping moments. The pump rotor (15) can be additionally stabilized against translational motion in the radial direction by a mechanical bearing device (24) for the rotor which is provided inside an interior space through which blood flows in the pump housing.

Abstract: The medical apparatus for an operating room, especially a heart-lung machine, includes an electrically-powered device for producing data and performing operation steps and a data monitoring and analysis device which is divided into a data monitoring unit and a data analysis unit which is separate from the data monitoring unit and can be located outside the operating room in which the electrically-powered device and monitoring unit are located. The data monitoring unit (14) includes a portable and removable memory card (20). Both the data monitoring unit (14) and the data analysis unit (15) have a receiving slot device in which the memory card can be inserted and held so that data can be transferred between the units (14) and (15) by carrying the memory card from one unit to the other. Thus the data analysis unit (15) can be used with many different types of electrically-powered devices used in the operating room and can be easily located outside of the operating room.