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Influence of hallux valgus deformity on forefoot pressure distribution of Chinese diabetic patients

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Abstract

Since issues about hallux valgus deformity (HV) in diabetic population were rarely reported, this study was aimed at investigating the influence of HV on their forefoot pressure distribution. Twenty-seven diabetic patients with HV (DMHV) and 27 diabetic control ones without HV (DMC) were recruited. Patients were inspected by an experience clinical expert and those with other deformities, a history of ulceration, neuropathy, or amputation were excluded. Barefoot plantar pressures while walking were measured by Emed-at pressure plate in their selected speed and in a protocol of two-step initial. Variables of relative centre of pressure oscillation in medial-lateral direction (%) (COPxrel), COP velocity (m/s) (COPv), peak pressure (kPa) (PP), relative maximum force (%) (MFrel), relative contact area (%) (CArel), and relative pressure/force-time integrals (%) (PTIrel/FTIrel) were calculated for the area of the hallux and the medial, central, and lateral forefoot. Results of independent t test with a significant level of 0.05 and 95 % confidence interval show that MFrel and CArel of DMHV at hallux were recorded significantly lower than those in DMC by 38.48 % (P = 0.02) and 2.86 % (P = 0.001), while CArel, FTIrel, and PTIrel of DMHV beneath medial forefoot were shown significantly larger than those DMC by 3.99 % (P = 0.002), 31.52 % (P = 0.04), and 7.14 % (P = 0.02). No significant differences between DMHV and DMC were found for variables of COPxrel (P = 0.60) and COPv (P = 0.39), as well as for force load transfer at the forefoot area. Overall, DMHV is featured with pressure off-load under the hallux and pressure over-load at the medial forefoot; moreover, forefoot stability and its normal load transfer mechanism would not be affected by HV when the angle of hallux is less than 25°.

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Acknowledgments

This study was supported by the project “new microbiologically-resistant leather and fur for medical use” (2009DFA42850) and by items from the Agency of Science and Technology of Sichuan Province for financial support (item No. 2009HH0004).

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Authors and Affiliations

  1. National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, 610065, Chengdu, People’s Republic of China

    Jin Zhou, Bo Xu & Wuyong Chen

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  1. Jin Zhou
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  2. Bo Xu
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  3. Wuyong Chen
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Correspondence to Wuyong Chen.

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Zhou, J., Xu, B. & Chen, W. Influence of hallux valgus deformity on forefoot pressure distribution of Chinese diabetic patients. Int J Diabetes Dev Ctries 35, 129–134 (2015). https://doi.org/10.1007/s13410-015-0304-5

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  • DOI: https://doi.org/10.1007/s13410-015-0304-5

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