Y-J Zeng et al 2004 Physiol. Meas. 25 1211 doi:10.1088/0967-3334/25/5/011
Y-J Zeng1,2, Y-H Qiao2, J Yang2,3, H Gregersen3, E-P Zhang2, X-H Xu1 and H Xu1
Show affiliationsIn this paper the torque of an oesophagus is studied for physiological and diabetic conditions. Since the function of the oesophagus is mainly mechanical, this work is focused on providing quantitative measurement of the passive biomechanical properties of the oesophagus torque. The oesophagus was treated as a membrane when calculating the stress and strain. The torque versus twist-angle relation was approximated to be linear at a specified pressure and longitudinal stretch ratio. Thus, the shear modulus can be computed by the torque, twist angle and polar moment of inertia in this state. The shear modulus varies greatly with the changing inflation pressure and longitudinal stretch ratio. When the longitudinal stretch ratio or transmural pressure is constant, the shear modulus is increased after 28 days of diabetes.
87.19.R- Mechanical and electrical properties of tissues and organs
06.30.Gv Velocity, acceleration, and rotation
07.10.Pz Instruments for strain, force, and torque
Issue 5 (October 2004)
Received 10 May 2004, accepted for publication 14 June 2004
Published 6 August 2004
Y-J Zeng et al 2004 Physiol. Meas. 25 1211
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