Apical aortic blood pump preclinical assessment for longterm use: durability test and stator topology to reduce wear in the bearing system
Artif. organs
; 44(8): 779-784, Aug. 2020. ilus., graf.
Article
in English
| Sec. Est. Saúde SP, SESSP-IDPCPROD, Sec. Est. Saúde SP
| ID: biblio-1121430
Responsible library:
BR79.1
ABSTRACT
This study presents an assessment for longterm use of the apical aortic blood pump (AABP), focusing on wear reduction in the bearing system. AABP is a centrifugal left ventricle assist device initially developed for bridge to transplant application. To analyze AABP performance in longterm applications, a durability test was performed. This test indicated that wear in the lower bearing pivot causes device failure in longterm. A wear test in the bearing system was conducted to demonstrate the correlation of the load in the bearing system with wear. Results from the wear test showed a direct correlation between load and wear at the lower bearing pivot. In order to reduce load, thus reducing wear, a new stator topology has been proposed. In this topology, a radial stator would replace the axial stator previously used. Another durability test with the new stator has accounted twice the time without failure when compared with the original model.
Full text:
Available
Collection:
National databases
/
Brazil
Database:
Sec. Est. Saúde SP
/
SESSP-IDPCPROD
Main subject:
Assisted Circulation
/
Infusion Pumps
/
Heart, Artificial
Type of study:
Prognostic study
Language:
English
Journal:
Artif. organs
Year:
2020
Document type:
Article
Institution/Affiliation country:
Instituto Dante Pazzanese de Cardiologia/BR
/
University of São Paulo/BR