Intravascular blood pump

An intravascular blood pump, comprising:

• a drive section having a motor housing with a proximal end and a distal end and further having
• an electric motor disposed in the motor housing, the electric motor possessing a motor shaft which protrudes out of the distal end of the motor housing, the motor shaft being radially mounted in the motor housing by a first radial bearing located at the proximal end of the motor housing and a second radial bearing located at the distal end of the motor housing, wherein at least one of the first and second radial bearings of the motor shaft is configured as a radial sliding bearing, and wherein the motor shaft is axially mounted within the motor housing by at least one of an axial sliding bearing and a radial-axial sliding bearing;
• a catheter connected to the proximal end of the motor housing, the catheter comprising lines for power supply to the electric motor;
• a pump section having a tubular pump housing fastened to the distal end of the motor housing and further comprising an impeller disposed on a distal end of the motor shaft, the impeller configured to rotate within the pump housing;
• wherein the motor shaft is made of ceramic;
• and
• wherein the at least one radial sliding bearing comprises an inner surface forming a bearing gap with a ceramic surface of the motor shaft, wherein the motor shaft is radially mounted in the motor housing by exactly two bearings which are maximally removed from each other and positioned at the proximal and distal ends of the motor housing.