Pulsatile blood pumping apparatus and method
First Claim
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1. A pulsatile fluid pumping system for circulating blood or blood-like fluids within the vascular systems of living tissue under automatically controlled and predetermined plural physiologic parameters, said system comprising:
- a pulsatile pump adapted for connection to said living tissue and having plural pumping parameters which may be independently controlled during cyclic operation of the pump, andsensing and control means for simultaneously monitoring plural predetermined physiologic parameters of said living tissue and for simultaneously controlling the plural independent pumping parameters as a predetermined logical function of said plural physiologic parameters so as to substantially maintain all such physiologic parameters at respectively corresponding predetermined values.
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Abstract
An intracorporeal, extracorporeal, cardiac assist, perfusion device or other pulsatile blood pumping system for circulating blood within living tissue under automatic control. Plural physiologic parameters of the tissue are monitored and utilized to control plural operating parameters of the pump during succeeding cycles of its operation so as to restore the monitored physiologic parameters to desired predetermined (but adjustable) values.
150 Citations
24 Claims
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1. A pulsatile fluid pumping system for circulating blood or blood-like fluids within the vascular systems of living tissue under automatically controlled and predetermined plural physiologic parameters, said system comprising:
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a pulsatile pump adapted for connection to said living tissue and having plural pumping parameters which may be independently controlled during cyclic operation of the pump, and sensing and control means for simultaneously monitoring plural predetermined physiologic parameters of said living tissue and for simultaneously controlling the plural independent pumping parameters as a predetermined logical function of said plural physiologic parameters so as to substantially maintain all such physiologic parameters at respectively corresponding predetermined values. - View Dependent Claims (2, 3, 4, 8)
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5. An extracorporeal pulsatile fluid pumping system for circulating blood or blood-like fluids within living tissue under automatically controlled and predetermined plural physiologic parameters, said system comprising:
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a cyclically operated pulsatile fluid pump which, when supplied with a fluid, operates at a controllable pump delivery speed (PDS) to deliver to said living tissue a controllable pump delivery volume (PDV) of fluid in a pump cycle time (PCT) period; at least one sensor and feedback circuit adapted to monitor a plurality of predetermined physiologic parameters within said living tissue and to provide a respectively corresponding plurality of first electrical signals representing the actual instantaneous values of such parameters in the living tissue; a plurality of manually adjustable input controls which provide a plurality of second electrical signals each representing the desired value for a respectively corresponding one of said predetermined physiologic parameters; and control circuits connected to receive said first and second electrical signals, to compare said actual instantaneous values with the respectively corresponding desired values and to control two or more of the pump parameters PDS, PDV and PCT as a predetermined function of said comparison so as to correct for detected deviations of the actual values from the desired values. - View Dependent Claims (6, 7)
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9. In a pulsatile fluid pumping system for circulating blood or blood-like fluids within the vascular system of living tissue, the improvement comprising:
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sensor means for sensing plural predetermined physiologic parameters within said living tissue; input means for presenting a predetermined desired value for each of said plural physiologic parameters; comparing means connected for comparing each of the sensed plural physiologic parameter values with its respectively corresponding predetermined desired value and providing corresponding plural output signals respectively representing detected deviations therefrom; and control means connected for controlling plural independent pumping parameters of said pumping system in response to a predetermined logical function of said detected deviations. - View Dependent Claims (10, 11, 12)
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13. A method for pulsatile circulation of blood or blood-like fluids within the vascular systems of living tissue under automatically controlled and predetermined plural physiologic parameters, said method comprising the steps of:
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simultaneously monitoring plural predetermined physiologic parameters of said living tissue; and simultaneously controlling plural independent pumping parameters of a pulsatile fluid pumping system as a predetermined logical function of said plural physiologic parameters so as to substantially maintain all such physiologic parameters at respectively corresponding predetermined values. - View Dependent Claims (14, 15, 16, 20)
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17. A method for pulsatile circulation of blood or blood-like fluids within living tissue under automatically controlled and predetermined plural physiologic parameters, said method comprising the steps of:
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operating a cyclical pulsatile fluid pump at a controllable pump delivery speed (PDS) to deliver to said living tissue a controllable pump delivery volume (PDV) of fluid in a pump cycle time (PDC) period; monitoring a plurality of predetermined physiologic parameters within said living tissue and generating a respectively corresponding plurality of first electrical signals representing the actual instantaneous values of such parameters in the living tissue; manually controlling and providing a plurality of second electrical signals each representing the desired value for a respectively corresponding one of said predetermined physiologic parameters; and comparing said actual instantaneous values with the respectively corresponding desired values and controlling two or more of the pump parameters PDS, PDV and PCT as a predetermined function of said comparison so as to correct for detected deviations of the actual values from the desired values. - View Dependent Claims (18, 19)
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21. An improved method for pulsatile circulation of blood or blood-like fluids within the vascular system of living tissue, said improved method comprising:
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sensing plural predetermined physiologic parameters within said living tissue; manually providing a predetermined desired value for each of said plural physiologic parameters; comparing each of the sensed plural physiologic parameter values with its respectively corresponding predetermined desired value and providing corresponding plural output signals respectively representing detected deviations therefrom; and controlling plural independent pumping parameters of said pumping system in response to a predetermined logical function of said detected deviations. - View Dependent Claims (22, 23, 24)
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Specification