Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads

Background: The characterization of the dynamic process of veins walls is essential to understand venous functioning under normal and pathological conditions. However, little work has been done on dynamic venous properties. Aim: To characterize vein compliance (C), viscosity (η), peak-strai...

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Autores principales:	ZÓCALO,YANINA, BIA,DANIEL, LLUBERAS,SEBASTIÁN, ARMENTANO,RICARDO L
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2008
Materias:	compliance damping energetic vascular physiology venous wall viscosity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000200012
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spelling	oai:scielo:S0716-976020080002000122009-03-24Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloadsZÓCALO,YANINABIA,DANIELLLUBERAS,SEBASTIÁNARMENTANO,RICARDO L compliance damping energetic vascular physiology venous wall viscosity Background: The characterization of the dynamic process of veins walls is essential to understand venous functioning under normal and pathological conditions. However, little work has been done on dynamic venous properties. Aim: To characterize vein compliance (C), viscosity (η), peak-strain (W St) and dissipated (W D) energy, damping (ξ), and their regional differences in order to evalúate their role in venous functioning during volume-pressure overloads. Methods: In a mock circulation, pressure (P) and diameter (D) of different veins (anterior cava, jugular and femoral; from 7 sheep), were registered during cyclical volume-pressure pulses. From the P-D relationship, C, W St and ξ (at low and high P-D leveis), η and W D were calculated. Resulls: For each vein there were P-dependent differences in biomechanical, energetics, and damping capability. There were regional-differences in C, η), W St and W D (p<0.05), but not in ξ. Conclusión: The regional-dependent differences in dynamics and energetics, and regional-similitude in damping could be important to ensure venous functioning during acute overloads. The lower C and higher W St and W D found in back-limb veins (femoral), commonly submitted to high volume-pressure loads (i.e. during walking), could be considered relevant to ensure adequate venous system functionality and venous wall protection simultaneously.info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.41 n.2 20082008-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000200012en10.4067/S0716-97602008000200012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	compliance damping energetic vascular physiology venous wall viscosity
spellingShingle	compliance damping energetic vascular physiology venous wall viscosity ZÓCALO,YANINA BIA,DANIEL LLUBERAS,SEBASTIÁN ARMENTANO,RICARDO L Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads
description	Background: The characterization of the dynamic process of veins walls is essential to understand venous functioning under normal and pathological conditions. However, little work has been done on dynamic venous properties. Aim: To characterize vein compliance (C), viscosity (η), peak-strain (W St) and dissipated (W D) energy, damping (ξ), and their regional differences in order to evalúate their role in venous functioning during volume-pressure overloads. Methods: In a mock circulation, pressure (P) and diameter (D) of different veins (anterior cava, jugular and femoral; from 7 sheep), were registered during cyclical volume-pressure pulses. From the P-D relationship, C, W St and ξ (at low and high P-D leveis), η and W D were calculated. Resulls: For each vein there were P-dependent differences in biomechanical, energetics, and damping capability. There were regional-differences in C, η), W St and W D (p<0.05), but not in ξ. Conclusión: The regional-dependent differences in dynamics and energetics, and regional-similitude in damping could be important to ensure venous functioning during acute overloads. The lower C and higher W St and W D found in back-limb veins (femoral), commonly submitted to high volume-pressure loads (i.e. during walking), could be considered relevant to ensure adequate venous system functionality and venous wall protection simultaneously.
author	ZÓCALO,YANINA BIA,DANIEL LLUBERAS,SEBASTIÁN ARMENTANO,RICARDO L
author_facet	ZÓCALO,YANINA BIA,DANIEL LLUBERAS,SEBASTIÁN ARMENTANO,RICARDO L
author_sort	ZÓCALO,YANINA
title	Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads
title_short	Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads
title_full	Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads
title_fullStr	Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads
title_full_unstemmed	Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads
title_sort	regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads
publisher	Sociedad de Biología de Chile
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000200012
work_keys_str_mv	AT zocaloyanina regionaldifferencesinveinswallviscositycomplianceenergeticsanddampinganalysisofthepressurediameterrelationshipduringcyclicaloverloads AT biadaniel regionaldifferencesinveinswallviscositycomplianceenergeticsanddampinganalysisofthepressurediameterrelationshipduringcyclicaloverloads AT lluberassebastian regionaldifferencesinveinswallviscositycomplianceenergeticsanddampinganalysisofthepressurediameterrelationshipduringcyclicaloverloads AT armentanoricardol regionaldifferencesinveinswallviscositycomplianceenergeticsanddampinganalysisofthepressurediameterrelationshipduringcyclicaloverloads
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Regional differences in veins wall viscosity, compliance. energetics and damping: analysis of the pressure-diameter relationship during cyclical overloads

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