The aim was to assess the luminal cross-sectional area (CSA) and the passive elastic properties of the oesophageal body under luminal pressure loading in anaesthetized rabbits. Stepwise inflation of a luminal balloon, in which the CSA and pressure were measured by means of impedance planimetry and perfused low-compliance manometry, provided the distension stimulus. The parameters of elasticity were computed from steady state values of these measurements. The steady state pressure-CSA and pressure-radius relations were nonlinear. At the lowest and highest luminal pressure load of 1 and 10 kPa, the steady state CSAs were 39 +/- 3 and 91 +/- 4 mm2, respectively. The circumferential tension-strain distribution was nonlinear and showed an exponential behaviour that fitted well to the function tension = a.e(b.strain). Differentiation of the function yielded the wall stiffness which also showed an exponential behaviour.
No takes yet. Share an insight, caveat, or question.
Gregersen et al. (2009) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context:
More from Digestion