Abstract: In a small sized pump driving unit, a fluid pump is used for driving the pump for supporting of substituting of cardiac function. The fluid pump can generate pressure fluctuations that can generate pulsation of the pump for supporting or substituting of cardiac function and produces sufficient performance to drive the pump unit.

Abstract: In a small sized pump driving unit, a fluid pump is used for driving the pump for supporting of substituting of cardiac function. The fluid pump can generates pressure fluctuations that can generate pulsation of the pump for supporting or substituting of cardiac function and produces sufficient performance to drive the pump unit.

Abstract: A blood pump driving device which is capable of making a blood pump 10 free from an unbalance between loads when sucking and discharging, respectively and which makes it possible to eliminate a sensor positioned close to a patient, is made up of an oil reservoir 30 including therein a gas chamber 33 and a liquid chamber 32, an oil pump 20 for pumping out a liquid stored in the liquid chamber 32 of the oil reservoir 30 to the blood pump 10, and a pressure accumulating chamber 34 storing therein a gas pressure of the gas chamber 33 of the oil reservoir 30 by being brought into fluid communication with the gas chamber 33 of the oil reservoir 30.

Abstract: A blood pump driving device which is capable of making a blood pump 10 free from an unbalance between loads when sucking and discharging, respectively and which makes it possible to eliminate a sensor positioned close to a patient, is made up of an oil reservoir 30 including therein a gas chamber 33 and a liquid chamber 32, an oil pump 20 for pumping out a liquid stored in the liquid chamber 32 of the oil reservoir 30 to the blood pump 10, and a pressure accumulating chamber 34 storing therein a gas pressure of the gas chamber 33 of the oil reservoir 30 by being brought into fluid communication with the gas chamber 33 of the oil reservoir 30.

Abstract: In a small sized pump driving unit, a fluid pump is used for driving the pump for supporting of substituting of cardiac function. The fluid pump can generates pressure fluctuations that can generate pulsation of the pump for supporting or substituting of cardiac function and produces sufficient performance to drive the pump unit.

Abstract: A micropump is disclosed including an input port, an output port, a fluid channel space located therebetween, a first oscillating member for opening or closing between the fluid channel space and the input port, a second oscillating member for opening or closing between the fluid channel space and the output port, and at least one third oscillating member for reducing/enlarging the volume of the fluid channel space. The micropump is provided with pressure correcting means which applies a pressure, substantially equal to a fluid pressure at the input port, to a space located outside the fluid channel space and in which the first oscillating member oscillates.

Abstract: Pumping apparatus which compresses or decompresses an actuating fluid alternately, which is in turn used to pump an artificial heart. To reduce the size of the apparatus, a diaphragm which contains a non-compressible actuating liquid is driven reciprocatingly by an electric linear motor. To prevent the occurrence of an excessive suction pressure which may be caused by the non-compressibility of the actuating fluid, at the commencement of the suction interval, the current to energize the linear motor is increased gradually and the pressure of the actuating liquid is detected. When the liquid pressure goes out of a selected safety range, the gradual increase ceases. A discharge stroke is detected from an integrated value of the motor current during the discharge interval, and when it reaches a given value, a reversal of the direction of energization of the motor is initiated.