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A Development of an Insole Type Local Shear Measurement Transducer and Measurements of Local Plantar Shear Force During Gait  

Jeong Im Sook (연세대학교 대학원 의공학과)
Ahn Seung Chan (연세대학교 대학원 의공학과)
Yi Jin Bok (한서대학교 의지보장구과)
Kim Han Sung (연세대학교 의공학부)
Kim Young Ho (연세대학교 의공학부)
Publication Information
Abstract
An insole type local shear force measurement system was developed and local shear stresses in the foot were measured during level walking. The shear force transducer based on the magneto-resistive principle, was a rigid 3-layer circular disc. Sensor calibrations with a specially designed calibration device showed that it provided relatively linear sensor outputs. Shear transducers were mounted on the locations of four metatarsal heads and heel in the insole. Sensor outputs were amplified, decorded in the bluetooth transmission part and then transferred to PC. In order to evaluate the developed system, both shear and plantar pressure measurements, synchronized with the three-dimensional motion analysis system, were performed on twelve young healthy male subjects, walking at their comfortable speeds. The maximum peak pressure during gait was 5.00kPa/B.W at the heel. The time when large local shear stresses were acted correlated well with the time of fast COP movements. The anteroposterior shear was dominant near the COP trajectory, but the mediolateral shear was noted away from the COP trajectory. The vector sum of shear stresses revealed a strong correlation with COP movement velocity. The present study will be helpful to select the material and to design of foot orthoses and orthopedic shoes for diabetic neuropathy or Hansen disease.
Keywords
Local shear sensor; shear stress; calibration device; plantar pressure;
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1 Lord, M., Hosein, R., 'Pressure redistribution by modeled insert in diabetic footwear: a pilot study,' J. Rehabil. Res. and Dev., Vol.31, No.4, pp. 214-221, 1994
2 Kim, Y.H., Yang, G.T., Mun, M.S., Park, S.B., 'Movements of the center of pressure during stance phase in free level walking of normal adults,' J. Biomed. Eng. Res., Vol.20, No.5, pp. 587-592, 1999   과학기술학회마을
3 Lord, M., Hosein R., 'Method for in-shoe shear stress measurement,' J. Biomed. Eng., Vol.14, No. 3, pp. 181-186, 1992   DOI
4 Lord, M., Hosein, R., Williams, B., 'A study of in-shoe plantar shear in patients with diabetic neuropathy,' Clinical Biomechanics, Vol.15, No. 4, pp. 278-283, 2000   DOI   ScienceOn
5 Tappin, J. W., Pollard, J., Beckett, E., 'A method of measuring shearing forces on the sole of the foot,' Clin. Phys. Physiol. Meas., Vol.1, No. 1, pp. 80-85, 1980   DOI   ScienceOn
6 Hosein, R., Lord, M., 'A study of in-shoe plantar shear in normals,' Clinical Biomechanics, Vol.15, No. 1, pp. 546-531, 2000   DOI   ScienceOn
7 Bennett, L., Kavner, D., Lee, B. Y., Trainor, F. S., Lewis, J. M., 'Skin stress and blood flow sitting paraplegic patients,' Arch. Phys. Med. Rehab., Vol.65, No.4, pp. 492-498, 1984
8 Goossens, R. H., Snijders, C. J., Hoek van Dijke G. A. , den Ouden A. H., 'A new instrument to measure force in beds and seats,' J. Biomed. Eng., Vol.15, No.5, pp. 409-412, 1994   DOI
9 Goossens, R. H., Snijders, C. J., 'Shear stress measurement on beds and wheelchairs,' J. Rehab. Med., Vol.29, No. 1, pp. 131-136, 1997
10 Reichel, S. M., 'Shearing force as a factor in decubitus ulcers in paraplegics,' Arch. Phys. Med. Rehab., Vol.166, No.3, pp. 762-763, 1958
11 Dinsdale, S. M., 'Decubitus ulcers : role of pressure and friction in causation,' Arch. Phys. Med. Rehab., Vo1.55, No.4, pp. 147-152, 1974
12 Bennett, L., Kavner, D., Lee, B. Y., Trainor, F. A., 'Shear vs pressure as causative factors in skin blood flow occlusion,' Arch. Phys. Med. Rehab., Vo1.60, No.7, pp. 309-314, 1979
13 Lee, C. T., 'The Diabetic Foot,' ChoiShin Medical Book, pp. 23-26, 2000
14 Veves, A., Murray, H. J., Young, M. J., Boulton, A. J., 'The risk of foot ulceration in diabetic patients with high foot pressure: a prospective study,' Diabetologia, Vol.35 No.7, pp. 660-663, 1992   DOI
15 Perry, J., 'The mechanics of walking: a clinical interpretation,' American Physical Therapy Assoc., pp. 9-32, 1967
16 Stephen, U., 'Plantar pressure-measurement sensors,' IOP Published Ltd, pp.1-31, 1999
17 Park, G. R., Cho, S. L., Han, S. J., 'Risk factors and prevalance of peripheral vascular disease in the diabetic patients,' Diabetologia, Vol.19, No.3, pp. 313-318, 1995
18 Han, K. S., Kim, Y. L., 'Malum perforans pedis in patients with Hansen's disease,' National Sorokdo Hospital, 2002
19 Kim, J. M., Kim, D. Y., Woo, J. T., 'A clinical study on the diabetic foot lesions,' Diabetologia, Vol.17, No.5, pp. 387-395, 1993
20 Kim, Y. G., 'The diabetic foot lesions,' Diabetologia, Vol.19, No. 1, pp. 1-5, 1995
21 Medved, V., 'Measurement of human locomotion,' CRC Press, pp. 157-168, 2001