| Author: | Lau, See-wai Sylvia |
| Title: | Effect of foot orthoses on plantar pressure distribution of patients with diabetic neuropathy |
| Degree: | M.Sc. |
| Year: | 2010 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Foot -- Abnormalities -- Treatment Diabetic neuropathies -- Patients |
| Department: | Department of Health Technology and Informatics |
| Pages: | ix, 67 leaves : ill. (some col.) ; 30 cm. |
| Language: | English |
| Abstract: | The prevention of diabetic foot ulcer will contribute to reduction in the rate of infection and lower limb amputation. Reduction in elevated plantar pressure is important in preventing from plantar foot ulceration of patients with diabetic neuropathy. Total contact foot orthoses were shown in many research studies that they could significantly reduce plantar pressure. There were little research on computer-aided design and computer-aided manufacturing (CAD-CAM) method. The purpose of this study was to find out the suitable casting method between CAD-CAM and foam impression methods for the total contact foot orthoses of diabetic patients with neuropathy. The F-Scan insole sensing system was used in this study to measure in-shoe dynamic pressures. Plantar pressure parameters including peak pressure, maximum force, pressure-time integral and contact area were analyzed. Seven subjects with diabetic neuropathy were recruited. Peripheral neuropathy was confirmed by vibration perception threshold > 25V. The subjects were all free of existing foot ulcer, lower limb amputation and gross foot deformity. Plantar pressure parameters of walking with three types of foot orthoses were compared. The three types of foot orthoses included total contact foot orthoses generated using CAD-CAM method by the Swiss Comfort CAD-CAM Foot Orthotics System, total contact foot orthoses generated using foam impression method and flat insole. The pressure data were divided into thirteen regions including total foot, medial heel, lateral heel, mid foot, first metatarsal head, second metatarsal head, third metatarsal head, fourth metatarsal head, fifth metatarsal head, first toe, second toe, third toe and fourth and fifth toes. The result showed that maximum force for foam impression method was statistically significant lower than flat insole at medial heel (p = 0.047) and lateral heel region (p = 0.011) during heel strike to mid-stance. The foot orthoses by CAD-CAM (p = 0.003) and foam impression methods (p = 0.002) had a significantly larger contact area than flat insole at mid foot region. The greatest load transfer from heel to mid foot regions. |
| Rights: | All rights reserved |
| Access: | restricted access |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| b23526798.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 2.22 MB | Adobe PDF | View/Open |
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