PMID: 9535520Apr 16, 1998Paper

Effects of alignment changes on stance phase pressures and shear stresses on transtibial amputees: measurements from 13 transducer sites

IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
J E SandersA J Dralle

Abstract

Interface pressures and shear stresses were measured at 13 sites on two unilateral below-knee amputee subjects ambulating with lower-limb patellar-tendon-bearing prostheses. Interface stresses at the time of the first peak in the shank axial force-time curve were investigated at different socket-shank alignment settings. Stress magnitudes ranged from 1.2 to 214.7 kPa for pressure and 0.4 to 79.6 kPa for resultant shear stress, and changes in stress due to misalignment ranged from 1.3 to 80.7 kPa for pressure and from 0.2 to 38.0 kPa for resultant shear stress. For both subjects interface stress changes were much greater in the anterior socket region than in the lateral or posterior regions. Thus, alignment changes had a localized effect on interface stresses. Plots of alignment versus pressure or resultant shear stress were nonlinear for both subjects, in a number of cases maximizing or minimizing at the nominal alignment, indicating complex interface stress-alignment relationships. Variation (standard deviation/mean) was not significantly different for nominal versus misaligned steps, indicating that the subjects adapted well to the alignment changes. Session to session differences in interface stresses were typically larger t...Continue Reading

References

Aug 1, 1979·IEEE Transactions on Bio-medical Engineering·R P Patterson, S V Fisher
Jan 1, 1992·Journal of Rehabilitation Research and Development·J E SandersE M Burgess
Aug 1, 1987·Journal of Biomechanical Engineering·D J Winarski, J R Pearson
Apr 16, 1998·IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·J E SandersA J Dralle
Dec 1, 1968·Journal of Biomechanics·F AppoldtR Contini

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Citations

Dec 4, 2003·Medical Engineering & Physics·Chih-Chieh LinI-Chen Liao
Jul 2, 2014·Biomedical Engineering Online·Hossein GholizadehNasrul Anuar Abd Razak
Oct 4, 2011·Artificial Intelligence in Medicine·Philip SewellStephen Andrews
Jun 12, 2003·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Ergin Tönük, M Barbara Silver-Thorn
Apr 16, 1998·IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·J E SandersA J Dralle
Mar 2, 2010·Foot and Ankle Clinics·John FergasonEric M Bluman
Dec 3, 2009·Physical Medicine and Rehabilitation Clinics of North America·Justin Z Laferrier, Robert Gailey
Jan 8, 2009·Disability and Rehabilitation. Assistive Technology·Xiaohong JiaRencheng Wang
Jan 25, 2012·Prosthetics and Orthotics International·Arezoo EshraghiSadeeq Ali
Aug 21, 2014·Prosthetics and Orthotics International·Goeran FiedlerBrian J Hafner
Oct 8, 2017·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Gholamhossein PirouziMajid Davoodi Makinejad
Nov 4, 2000·Prosthetics and Orthotics International·J E SandersB J Hafner
Jun 19, 2003·Prosthetics and Orthotics International·A FridmanE Isakov
Mar 14, 2017·Journal of medical and biological engineering·Philip DavenportSaeed Zahedi
Jun 5, 2002·Prosthetics and Orthotics International·J S RietmanJ H B Geertzen
Dec 13, 2017·Medical Engineering & Physics·Eric C SwansonJoan E Sanders

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