Please use this identifier to cite or link to this item: https://repositorio.fei.edu.br/handle/FEI/3411
Title: Tribology and Crystallinity in pivot bearings of Ventricular Assist Devices
Authors: MARQUIORI, D. S.
FLORENTINO, P. C.
ARAKI, S. Y.
FUJITA, I. K.
BASSO, R.
BABETTO, A.
MORO, J.
Baltus Cornelius Bonse
LEÃO, T. F.
ANDRADE, A. J. P.
BOCK, E. G. P.
Issue Date: 5-Mar-2020
Abstract: Ventricular Assist Devices are blood pumps used in patients with Congestive Heart Failure who are waiting for a heart transplant. They aim to assist the ventricle to pump out blood in physiological circulation by increasing aortic pressure and decreasing intraventricular pressure. The IFSP Laboratory of Bioengineering and Biomaterials (BIOENG) has been developing an Implantable Centrifugal Blood Pump called CARoL for mechanical circulatory support. The objective of this dissertation is to evaluate the changes in the crystallinity of the polymeric Pivot Bearings supporting the impeller of this pump when subjected to friction generated by rotation of zirconia oxide ceramic shafts. The adopted methodology consisted of submitting new and used samples of: a) bearings set made of polyamide 6; and b) the set made of poly-ether-ether-ketone. Those new and used samples were characterized by X-ray diffraction tests and Infrared Spectroscopy. The diffractograms and spectra obtained were compared to evaluate the bearing crystallinity, for both polymers before and after friction. The tests carried out showed diffractograms and similar spectra for the new and used samples, thus, there are indications that the friction generated by the rotation of the shafts did not change the crystallinity of the polymeric bearings supporting the pump rotor.
Keywords: VAD
X-Ray Diffraction
infrared spectroscopy
crystallinity
CARoL Pump
polymeric bearings
Journal: The Academic Society Journal
ISSN: 2595-1521
Citation: MARQUIORI, D. S.; FLORENTINO, P. C.; ARAKI, S. Y.; FUJITA, I. K.; BASSO, R.; BABETTO, A.; MORO, J.; BONSE, B. C.; LEÃO, T. F.; ANDRADE, A. J. P.; BOCK, E. G. P. Tribology and crystallinity in pivot bearings of ventricular assist devices. The Academic Society Journal, v. 4, n. 1, p. 52-62, Marc. 2020.
Access Type: Acesso Aberto
DOI: 10.32640/tasj.2020.1.52
URI: https://repositorio.fei.edu.br/handle/FEI/3411
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