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dc.contributor.author
Niccolini, Gianni
dc.contributor.author
Manuello, Andrea
dc.contributor.author
Capone, Antonio
dc.contributor.author
Marongiu, Giuseppe
dc.contributor.author
Dell'osa, Antonio Héctor
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dc.contributor.author
Fois, Andrea
dc.contributor.author
Velluzzi, Fernanda
dc.contributor.author
Concu, Alberto
dc.date.available
2023-08-14T19:39:32Z
dc.date.issued
2020-09
dc.identifier.citation
Niccolini, Gianni; Manuello, Andrea; Capone, Antonio; Marongiu, Giuseppe; Dell'osa, Antonio Héctor; et al.; Possible Assessment of Calf Venous Pump Efficiency by Computational Fluid Dynamics Approach; Frontiers Media; Frontiers in Physiology; 11; 1003; 9-2020; 1-17
dc.identifier.uri
http://hdl.handle.net/11336/208233
dc.description.abstract
Three-dimensional simulations of peripheral, deep venous flow during muscular exercise in limbs of healthy subjects and in those with venous dysfunction were carried out by a computational fluid-dynamics (CFD) approach using the STAR CCM + platform. The aim was to assess the effects of valvular incompetence on the venous calf pump efficiency. The model idealizes the lower limb circulation by a single artery, a capillary bed represented by a porous region and a single vein. The focus is on a segment of the circuit which mimics a typical deep vein at the level of the calf muscle, such as the right posterior tibial vein. Valves are idealized as ball valves, and periodic muscle contractions are given by imposing time-dependent boundary conditions to the calf segment wall. Flow measurements were performed in two cross-sections downstream and upstream of the calf pump. Model results demonstrate a reduced venous return for incompetent valves during calf exercise. Two different degrees of valvular incompetence are considered, by restricting the motion of one or both valves. Model results showed that only the proximal valve is critical, with a 30% reduction of venous return during calf exercise in case of valvular incompetence: the net flow volume ejected by the calf in central direction was 0.14 mL per working cycle, against 0.2 mL for simulated healthy limbs. This finding appeared to be consistent with a 25% reduction of the calf ejection fraction, experimentally observed in chronic venous disease limbs compared with healthy limbs.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Frontiers Media
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
CALF VENOUS PUMP
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COMPUTATIONAL FLUID-DYNAMICS
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LEG VEINS BLOOD FLOW
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STAR CCM + PLATFORM
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VENOUS VALVULAR INCOMPETENCE
dc.subject.classification
Otras Ingenierías y Tecnologías
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dc.subject.classification
Otras Ingenierías y Tecnologías
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Possible Assessment of Calf Venous Pump Efficiency by Computational Fluid Dynamics Approach
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-05-29T15:53:51Z
dc.identifier.eissn
1664-042X
dc.journal.volume
11
dc.journal.number
1003
dc.journal.pagination
1-17
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Niccolini, Gianni. Politecnico di Torino; Italia
dc.description.fil
Fil: Manuello, Andrea. Politecnico di Torino; Italia
dc.description.fil
Fil: Capone, Antonio. Università degli Studi di Cagliari; Italia
dc.description.fil
Fil: Marongiu, Giuseppe. Università degli Studi di Cagliari; Italia
dc.description.fil
Fil: Dell'osa, Antonio Héctor. Universidad Nacional de Tierra del Fuego; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Fois, Andrea. Nomadyca Ltd; Uganda
dc.description.fil
Fil: Velluzzi, Fernanda. Università degli Studi di Cagliari; Italia
dc.description.fil
Fil: Concu, Alberto. Università degli Studi di Cagliari; Italia
dc.journal.title
Frontiers in Physiology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3389/fphys.2020.01003
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.frontiersin.org/articles/10.3389/fphys.2020.01003/full
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