title: Dynamic model of a sac-type pneumatically driven artificial ventricle.
abstract: Inlet and outlet pressures and flows were obtained over a wide range of operating conditions for a pneumatically driven sac-type artificial ventricle connected to a mechanical mock circulatory system. The load presented to the ventricle by the mock circulatory system was found to be characterized by a linear resistance and capacitance. A dynamic model for the ventricle which accounted for instantaneous pressures and flows was developed. The outlet port is characterized by an inertance and square law resistance; the inlet port is characterized by a nonlinear resistance dependent on the type of valve. The input to the model is the time varying sac pressure. The model predicts the fill-limited and ejection-limited modes of the artificial ventricle.
authors.forename: D B
authors.initials: DB
authors.lastname: Geselowitz
authors.forename: G E
authors.initials: GE
authors.lastname: Miller
authors.forename: W M
authors.initials: WM
authors.lastname: Phillips