초록 ▼

In a magnetically suspended type pump, an operating state of the pump can be obtained without using a pressure gauge and a flowmeter. In addition, in the case where the magnetically suspended type pump is applied to a blood pump, in order to reduce the number of connections in a flow path and to avo

In a magnetically suspended type pump, an operating state of the pump can be obtained without using a pressure gauge and a flowmeter. In addition, in the case where the magnetically suspended type pump is applied to a blood pump, in order to reduce the number of connections in a flow path and to avoid thrombus formation, a correlation between current flowing in a motor and flow or a correlation between current flowing in the motor and pressure is obtained in advance, and the speed of rotation of motor is varied by a speed of rotation control circuit in response to an instruction from a CPU circuit, based on the obtained correlation between current and flow or between current and pressure, whereby flow or pressure is controlled.

대표청구항 ▼

[ What is claimed is:] [1.] A magnetically suspended type pump in which an impeller is supported within a case by a magnetic bearing without contact and said impeller is rotated by a motor whose speed can be controlled by magnetic coupling through a partition therebetween, comprising:processing mean

[ What is claimed is:] [1.] A magnetically suspended type pump in which an impeller is supported within a case by a magnetic bearing without contact and said impeller is rotated by a motor whose speed can be controlled by magnetic coupling through a partition therebetween, comprising:processing means for obtaining a correlation between current flowing in said motor and fluid flow or between current flowing in said motor and outlet pressure;control means for changing a speed of rotation of said motor based on the correlation between current and flow or between current and pressure obtained by said processing means, thereby controlling flow or pressure; andcorrection means for correcting flow or pressure obtained from blood viscosity which is obtained from disturbance response of said impeller supported by said magnetic bearing.