Fluid circulator for nonlinear compliant circuits

Details Fluid circulator for nonlinear compliant circuits Fluid circulator for nonlinear compliant circuits

1997-07-03

2000-02-15

Schaetzle, Kennedy J.

Surgery

Cardiac augmentation

With condition responsive means

600 16, 604 31, 128898, A61M 110

Patent

active

060246928

ABSTRACT:
Flow in nonlinearly compliant leaky fluid circuits is controlled by alteration of control variables in fluid pathways external to the leaky circuits. In analogous practical applications, blood flow in patients undergoing total cardiopulmonary bypass is modified to limit transvascular fluid loss from the circulatory system into body tissues by altering control variables in an external fluid pathway through which venous blood from the patient passes before being oxygenated and returned under pressure to the patient's arterial system. A controller uses predetermined rules operating on control variables to achieve objectives which may include minimization of fluid leak rates and/or maintenance of euvolemic conditions in a patient's circulatory system while circulatory system flow rates are maintained at or above physiologically-established minimums.

REFERENCES:
patent: 4314550 (1982-02-01), Apstein
patent: 4627419 (1986-12-01), Hills
patent: 5437601 (1995-08-01), Runge

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