Title:
SPEED CONTROL SYSTEM FOR IMPLANTED BLOOD PUMPS
Document Type and Number:
WIPO Patent Application WO1998019624
Kind Code:
A3
Abstract:
An automatic speed control system continually adjusts the speed of an implanted cardiac assist blood pump to an optimum level for the varying physiological needs of the patient. It does this by periodically iteratively incrementing the speed setpoint of the pump. When the system detects the imminence of a ventricular collapse at diastole, it decrements the speed setpoint by a predetermined safety margin. An alarm condition is provided if the setpoint decrease results in an insufficient blood flow rate through the pump. The flow rate and imminence of ventricular collapse are computed in real time as functions of only the pump's motor current and speed setpoint.
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Inventors:
ANTAKI JAMES F
CHOI SEONGJIN
BOSTON JOHN ROBERT
BUTLER KENNETH C
THOMAS DOUGLAS C
CHOI SEONGJIN
BOSTON JOHN ROBERT
BUTLER KENNETH C
THOMAS DOUGLAS C
Application Number:
PCT/IB1997/001501
Publication Date:
October 08, 1998
Filing Date:
October 31, 1997
Export Citation:
Assignee:
NIMBUS INC (US)
International Classes:
A61M60/178; A61M60/232; A61M60/237; A61M60/422; A61M60/538; A61M60/546; (IPC1-7): A61F/
Foreign References:
| US5693091A | 1997-12-02 |
Other References:
See also references of EP 0877633A4
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