| 摘要 |
PCT No. PCT/FR97/00302 Sec. 371 Date Dec. 11, 1998 Sec. 102(e) Date Dec. 11, 1998 PCT Filed Feb. 19, 1997 PCT Pub. No. WO97/30739 PCT Pub. Date Aug. 28, 1997The pump (10) has variable volume means (24) co-operating with a distinct volume (20) through which the blood flows for the purpose of varying said volume (20) through which the blood flows in cyclical and controlled manner. According to the invention, the control circuit for the pump comprises: means for sensing data representative of aortic pressure (P(t)); means for sensing data representative of venous oxygen concentration (PO2V); means for sensing data representative of aortic oxygen concentration (PO2A); means for sensing data representative of heartbeat frequency (F); and/or means for sensing data representative of the myocardial contractility (dP/dt). The circuit can control the rates (u(t), v(t)) at which said volume varies during the systolic and diastolic phases of the myocardium, and also the instants (tA; tR) at which said variation of the volume starts during the systolic and diastolic phases. |
