Titre
Cross-sectional compliance overestimates arterial compliance because it neglects the axial strain.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Tozzi, P.
Auteure/Auteur
Hayoz, D.
Auteure/Auteur
Corno, A.F.
Auteure/Auteur
Mallabiabarrena, I.
Auteure/Auteur
von Segesser, L.K.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1424-7860
Statut éditorial
Publié
Date de publication
2003-08-23
Volume
133
Numéro
33-34
Première page
461
Dernière page/numéro d’article
464
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Publication Status: ppublish
Résumé
A high resolution echo-tracking system permits the calculation of cross-sectional compliance considering vessel diameter variations alone, and assumes that longitudinal movement of the vessel wall due to pulse pressure is negligible. However, using piezoelectric crystals sutured on the adventitia of the vessel wall we demonstrated that arterial length changes up to 5% (mean 2.7%) as a function of pulse pressure. Therefore, cross-sectional compliance seems to provide a limited approximation of the real phenomenon because it neglects axial vessel movement. Axial vessel movement is taken into account when the vessel compliance is calculated according to the principle of continuity of the mass: [equation: see text]. To verify this hypothesis we measured the blood flow gradient through 10 cm long segments of 10 pig carotid arteries (Qin - Qout) and divided it for the derivative of blood pressure over a given time (deltaP/deltat). For the same vessels, we calculated the cross-sectional compliance (CC) using the echo-tracking system (NIUS 02). We found a CC of (5.91 +/- 0.4) x 10(-7) micro m(2)/mm Hg and a segmental carotid compliance or dynamic compliance (C(d)) of (6.21 +/- 0.2) x 10(-8) micro m(3)/mm Hg. The impact of axial strain in calculations of compliance results in a dynamic compliance, which is one order of magnitude smaller than traditionally calculated arterial compliance.
PID Serval
serval:BIB_1F03693AF779
PMID
Date de création
2008-01-17T15:38:25.865Z
Date de création dans IRIS
2025-05-20T14:20:01Z
Fichier(s)![Vignette d'image]()
En cours de chargement...
Nom
14625813.pdf
Version du manuscrit
published
Taille
320.16 KB
Format
Adobe PDF
PID Serval
serval:BIB_1F03693AF779.P001
URN
urn:nbn:ch:serval-BIB_1F03693AF7797
Somme de contrôle
(MD5):9d2eb4c99ba402827e9f108b7545ebda