| 摘要 |
<p>A Mechanical heart system for implantation into the human body includes a pump (10) and control circuit (30). The pump (10) is run at a frequency which is a harmonic multiple of a normal heart beat frequency, and the pump chamber volume is reduced, proportionately to the increased pumping frequency. The circuit (30) for controlling the frequency includes a phase locked loop (35) for implementing a predictive algorithm which adjusts the frequency dynamically based on heart muscle nerve ending signals, so as to synchronize the circuit output to the biologically determined heart beat. The reduced displacement permits use of a smaller compliance chamber. A novel interconnection between the motor chambers (12, 12') of a plurality of such pumps (11, 13) eliminates the need for venting and compliance chambers (37) in a totally implanted heart system.</p> |
