Implantable Centrifugal Blood Pump With Dual Impeller and Double Pivot Bearing System: Electromechanical Actuator, Prototyping, and Anatomical Studies

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...

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Bibliographic Details
Published in:Artificial organs 2011-05, Vol.35 (5), p.437-442
Main Authors: Bock, Eduardo, Antunes, Pedro, Leao, Tarcisio, Uebelhart, Beatriz, Fonseca, Jeison, Leme, Juliana, Utiyama, Bruno, da Silva, Cibele, Cavalheiro, Andre, Filho, Diolino Santos, Dinkhuysen, Jarbas, Biscegli, Jose, Andrade, Aron, Arruda, Celso
Format: Article
Language:English
Subjects:
Anatomy
Animals
Biomechanical Phenomena
Brazil
Brushless direct current motor
Cattle
Dual impeller centrifugal blood pump
Heart-Assist Devices
Hemodynamics
Implantable centrifugal blood pump
Left ventricular assist device
Male
Materials Testing
Prosthesis Design
Prosthesis Implantation
Ventricular Function, Left
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Summary: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.
ISSN:0160-564X
1525-1594
DOI:10.1111/j.1525-1594.2011.01260.x