Title :
Performance prediction of a percutaneous ventricular assist system - a nonlinear circuit analysis approach
Author :
Yu, Yih-Choung ; Simaan, Marwan A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Lafayette Coll., Easton, PA, USA
Abstract :
A percutaneous ventricular assist system, consisting of a centrifugal blood pump, an atrial drainage cannula, and various sizes of arterial perfusion cannulae, is modeled as a nonlinear circuit, including a speed dependent voltage source and current dependent resistors. This model is used to predict the performance of the system in terms of blood flow rate through the system by specifying pump speed, mean arterial pressure and left atrial pressure. The predicted pump flow is obtained by solving the current through the circuit using an optimization routine. It is shown that the model predicted flow rates accurately with mean error less than 2%, when the predicted flows from the model are compared to the experimental data
Keywords :
artificial organs; biocontrol; cardiovascular system; haemodynamics; least squares approximations; nonlinear network analysis; optimisation; pumps; arterial perfusion cannulae; atrial drainage cannula; blood flow rate; centrifugal blood pump; current dependent resistors; least squares fit; left atrial pressure; mean arterial pressure; mean error; nonlinear circuit analysis approach; optimization routine; percutaneous ventricular assist system; performance prediction; pump speed; speed dependent voltage source; Arteries; Blood flow; Circuit analysis; Heart; Leg; Nonlinear circuits; Performance analysis; Predictive models; Resistors; Voltage;
Conference_Titel :
Bioengineering Conference, 2002. Proceedings of the IEEE 28th Annual Northeast
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-7419-3
DOI :
10.1109/NEBC.2002.999444
