The effect of perfusion on soft tissue mechanical properties: a computational model.
Some simple finite element models were constructed to investigate the magnitude and character of changes in mechanical properties of very soft tissues due to the loss of perfusion. Changes in the apparent stress-strain curve were used to characterise the effect of simulated blood perfusion pressure on the engineering stress-strain curve. The results indicated that the blood to tissue volume ratio and the perfusion pressure have the strongest effect on the effective stress-strain response of a representative tissue cell. Tissue viscoelasticity increased the sensitivity of the system to perfusion pressure changes.
Bilston
Lynne E
LE
School of Aerospace, Mechanical and Mechatronic Engineering, Building J07, University of Sydney, NSW 2006, Sydney, Australia. l.bilston@unsw.edu.au
D001921:Brain / Q000098:blood supply* / Q000502:physiology; D003198:Computer Simulation; D004548:Elasticity; D020342:Finite Element Analysis; D008954:Models, Biological; D008959:Models, Neurological; D011312:Pressure; D012039:Regional Blood Flow / Q000502:physiology; D015203:Reproducibility of Results; D012212:Rheology / Q000379:methods*; D012680:Sensitivity and Specificity; D013314:Stress, Mechanical; D014783:Viscosity; D016474:Weight-Bearing / Q000502:physiology*