2007
DOI: 10.1007/s10620-006-9238-6
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Abstract: The mechanical properties of the esophagus are important for its function because the esophagus is subjected to changes in wall stress and strains caused by the passage of boli and the action of peristalsis. Electrodes for impedance planimetry and an ultrasound transducer were placed on the probe inside a fluid-filled bag and used to study the circumferential stress and strain relation of the porcine esophagus in vitro. Impedance planimetry was used to determine the luminal cross-sectional area (CSA) and high-… Show more

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Cited by 8 publications
(6 citation statements)
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References 40 publications
(80 reference statements)
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“…That is probably because the in-vitro mechanical properties of esophageal mucosa, depending on the test procedure and tissue preparation, are quite different from in-vivo ones at normal physiological conditions. This might also explain why the reported in-vitro material properties vary substantially among studies (Yang et al 2006a; Zhao et al 2007; Natali et al 2009; Stavropoulou et al 2009). …”
Section: Discussionmentioning
confidence: 99%
See 2 more Smart Citations
“…That is probably because the in-vitro mechanical properties of esophageal mucosa, depending on the test procedure and tissue preparation, are quite different from in-vivo ones at normal physiological conditions. This might also explain why the reported in-vitro material properties vary substantially among studies (Yang et al 2006a; Zhao et al 2007; Natali et al 2009; Stavropoulou et al 2009). …”
Section: Discussionmentioning
confidence: 99%
“…The active and passive properties of the muscular layers have been relatively well studied (Nicosia and Brasseur 2002; Jung et al 2004; Ghosh et al 2005; Mittal et al 2006; Brasseur et al 2007; Zhao et al 2007; Kou et al 2015a). However, the submucosa and mucosa, here collectively called mucosa, has been the object of relatively little research relating to bolus transport.…”
Section: Introductionmentioning
confidence: 99%
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“…The biomechanical characteristics of the normal esophagus (esophageal body) can be summarized as follows: (1) the tension and stress of the esophageal wall increase exponentially as functions of the pressure, 28-34 and, consequently, the tissue is soft at physiologic pressures and stiffer in the supraphysiologic pressure range; (2) the tension and stress distributions are nonuniform along the esophagus 30,31 and across the esophageal wall; 33 (3) the esophageal wall is anisotropic, with different stiffness in the circumferential, longitudinal, and the circumferential-longitudinal shear directions; 35 (4) the stress distribution in the different layers is nonlinear and anisotropic; [36][37][38][39][40][41][42] (5) collagen and elastin are important for the passive biomechanical properties of the esophagus; 23 (6) the stress-strain relationship of the active muscle contraction is different during isovolumic and isobaric distensions, but the passive components are similar under these experimental conditions; 43,44 and (7) the stress softening in the rat esophagus is reversible after the activation of KCl-induced contractions. 45 The UES and the LES control passage between the pharynx and the esophagus and passage between the esophagus and the stomach.…”
Section: Normal Esophageal Anatomy Function and Biomechanical Propementioning
confidence: 99%
“…A Newton's law force balance across the esophageal wall relates wall‐averaged stress to an appropriate esophageal wall strain measure. From the force balance, total wall stress can be estimated from concurrent measurement of intraluminal pressure, luminal cross‐sectional area, and wall thickness in vivo as well as in vitro . With estimated total stress and measured strain relationship from different patients and age groups, the stiffness of the esophageal wall can be estimated and compared between different groups .…”
Section: Constitutive Models Relevant To the Esophagusmentioning
confidence: 99%