| 摘要 |
<p>A system for pumping blood to assist or assume the cardiac function of a patient, is characterized by a blood pump (14) that exhibits a steep performance curve such that only small changes in pump flow occur for large changes in differential pressure across the pump. The pump therefore exhibits flow limiting characteristics to protect the physiological system against harmful flow rates or pressures. Pump flow may also be limited by controlling the current provided to a driver (26) from a power supply (16), or by suitable restrictions within or external to the pump housing (100).</p> |
