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International Orthopaedics

, Volume 36, Issue 7, pp 1411–1415 | Cite as

Foot loading with an ankle-foot orthosis: the accuracy of an integrated physical strain trainer

  • Johannes Pauser
  • Andreas Jendrissek
  • Matthias Brem
  • Kolja Gelse
  • Bernd Swoboda
  • Hans-Dieter CarlEmail author
Original Paper

Abstract

Purpose

To investigate the value of a built-in physical strain trainer for the monitoring of partial weight bearing with an ankle-foot orthosis.

Methods

12 healthy volunteers were asked to perform three trials. Plantar peak pressure values from normal gait (trial one) were defined as 100% (baseline). The following trials were performed with the Vacoped® dynamic vacuum ankle orthosis worn in a neutral position with full weight bearing (trial two) and a restriction to 10% body weight (BW) (trial three), as monitored with an integrated physical strain trainer. Peak plantar pressure values were obtained using the pedar® X system.

Results

Peak pressure values were statistically significantly reduced wearing the Vacoped® shoe with full weight bearing for the hindfoot to 68% of the baseline (normal gait) and for the midfoot and forefoot to 83% and 60%, respectively. Limited weight bearing with 10% BW as controlled by physical strain trainer further reduced plantar peak pressure values for the hindfoot to 19%, for the midfoot to 43% of the baseline and the forefoot to 22% of the baseline.

Conclusions

The Vacoped® vacuum ankle orthosis significantly reduces plantar peak pressure. The integrated physical strain trainer seems unsuitable to monitor a limitation to 10% BW adequately for the total foot. The concept of controlling partial weight bearing with the hindfoot-addressing device within the orthosis seems debatable but may be useful when the hindfoot in particular must be off-loaded.

Keywords

Peak Pressure Weight Bearing Autologous Chondrocyte Implantation Plantar Pressure Full Weight Bearing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Johannes Pauser
    • 1
  • Andreas Jendrissek
    • 1
  • Matthias Brem
    • 1
  • Kolja Gelse
    • 1
  • Bernd Swoboda
    • 1
  • Hans-Dieter Carl
    • 1
    Email author
  1. 1.Division of Orthopedic RheumatologyFriedrich-Alexander-University of Erlangen-NurembergErlangenGermany

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