CORDEIRO, T. D.; CORDEIRO, THIAGO.; DAMASCENO CORDEIRO, THIAGO.; http://lattes.cnpq.br/2971153330790431; CORDEIRO, Thiago Damasceno.
Resumo:
Ventricular assist devices (VADs) are mechanical pumps used to provide support to the circulatory
system of patients with some ventricular disfunction and that are waiting for a heart transplantation. When this support lasts for weeks or months, physiological control systems can improve this
treatment by changing automatically the pump output in response to changes in the cardiovascular
system. In this work, a physiological control system was developed to adjust the pump ejection
pressure at each cardiac cycle to keep the mean aortic pressure at a specified reference value. A
heart beat detection algorithm based on electrocardiogram signals (ECG) is used in such way the
control system works in synchronization with the heart beat. Mathematical models of the peditaric
cardiovascular system and of a specific pulsatile pediatric pump were used to evaluate the cardiovascular response under ventricular assistance. Computational simulation results were analyzed
and one may conclude the synchronous physiological control system adapted the cardiovascular
response to the changes in references values, defined in accordance with the patient clinical status.