Centrifugal pump for medical use and artificial heart assist device having centrifugal pump for medical use

A centrifugal pump for medical use, comprising:

• a rotating shaft;
• a pump substrate that has a driving unit configured to rotate the rotating shaft;
• a housing that has an inlet and an outlet and that forms a pump chamber with the pump substrate, the pump chamber through which a body fluid sucked from the inlet flows;
• and
• an impeller that is housed in the pump chamber and that is configured to use the rotating shaft as an axis,
• wherein the pump substrate has a magnetism generating source,
• the rotating shaft protrudes into the pump chamber from the pump substrate, and is pivotally supported on the pump substrate,
• a space is formed between the pump substrate and the impeller and a space is formed between the pump substrate and the rotating shaft, and
• a magnetic fluid is configured to seal an outer periphery side of the impeller in the space formed between the pump substrate and the impeller.