title: Implantable centrifugal blood pump with dual impeller and double pivot bearing system: electromechanical actuator, prototyping, and anatomical studies.
abstract: An implantable centrifugal blood pump has been developed with original features for a left ventricular assist device. This pump is part of a multicenter and international study with the objective to offer simple, affordable, and reliable devices to developing countries. Previous computational fluid dynamics investigations and wear evaluation in bearing system were performed followed by prototyping and in vitro tests. In addition, previous blood tests for assessment of normalized index of hemolysis show results of 0.0054±2.46 × 10⁻³ mg/100 L. An electromechanical actuator was tested in order to define the best motor topology and controller configuration. Three different topologies of brushless direct current motor (BLDCM) were analyzed. An electronic driver was tested in different situations, and the BLDCM had its mechanical properties tested in a dynamometer. Prior to evaluation of performance during in vivo animal studies, anatomical studies were necessary to achieve the best configuration and cannulation for left ventricular assistance. The results were considered satisfactory, and the next step is to test the performance of the device in vivo.
authors: Center for Engineering in Cardiac Assistance, CEAC, Institute Dante Pazzanese of Cardiology, Campinas State University, São Paulo, Brazil. eduardo_bock@yahoo.com.br
authors: Eduardo
authors: E
authors: Bock
authors: Pedro
authors: P
authors: Antunes
authors: Tarcisio
authors: T
authors: Leao
authors: Beatriz
authors: B
authors: Uebelhart
authors: Jeison
authors: J
authors: Fonseca
authors: Juliana
authors: J
authors: Leme
authors: Bruno
authors: B
authors: Utiyama
authors: Cibele
authors: C
authors: da Silva
authors: Andre
authors: A
authors: Cavalheiro
authors: Diolino Santos
authors: DS
authors: Filho
authors: Jarbas
authors: J
authors: Dinkhuysen
authors: Jose
authors: J
authors: Biscegli
authors: Aron
authors: A
authors: Andrade
authors: Celso
authors: C
authors: Arruda