Document Detail

A novel design of ventricular assist device: An in vitro feasibility study.
MedLine Citation:
PMID:  22375618     Owner:  NLM     Status:  Publisher    
Abstract Left ventricular assist devices (LVADs) work as a bypass between the left ventricular apex and the ascending aorta. The surgical procedure for their insertion requires the opening of the cardiac cavities and the dissection of the great vessels, the blood is constrained to flow through the device components and the risk can be run of thrombogenesis, haemolysis and infections. A possible strategy to overcome this limitation consists in utilizing external systems that assist the heart in its contraction from the outside without directly transporting the blood. In this study we conduct the feasibility analysis of a novel external LVAD design that does not require the opening of the cardiac cavities and the dissection of the great vessels and that allows the removal procedure to be easily achieved. The device, including a stepper motor, three metallic wires and three elastic elements, works alternatively between a contraction condition where it induces an elastic compulsion on the heart and a release condition where it elastically releases the organ. The values of force acting on the wires and the values of current supplied to the motor were measured and utilized for a preliminary study design. The experimental measurements demonstrated the feasibility of the system.
Antonio Boccaccio; Carmine Carbone; Umberto Galietti; Filippo Mastropasqua; Carmine Pappalettere
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-29
Journal Detail:
Title:  Minimally invasive therapy & allied technologies : MITAT : official journal of the Society for Minimally Invasive Therapy     Volume:  -     ISSN:  1365-2931     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-3-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9612996     Medline TA:  Minim Invasive Ther Allied Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Mechanical and Management Engineering , Polytechnic of Bari, Bari , Italy.
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