Development of an active ankle-foot orthosis for hemiplegic patients

Jung Yoon Kim, Sung Jae Hwang, Young Ho Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

17 Scopus citations

Abstract

In this study, we developed an active ankle-foot orthosis(AAFO) which could control dorsiflexion/plantarflexion of the ankle joint to prevent foot drop and toe drag during walking. To prevent foot slap after initial contact, the ankle joint needs to be actively controlled to minimize forefoot collision with the ground. During late stance, the ankle joint also needs to be controlled to provide toe clearance and to help push-off. 3D gait analyses were performed on a hemiplegic patient under three different gait conditions: gait without AFO(NAFO), gait with the conventional hinged AFO without controlling ankle joint (HAFO), and gait with the developed AFO(AAFO). Results showed that AAFO could prevent not only foot drop by the proper plantarflexion during loading response but also toe drag by sufficient amount of plantarflexion in pre-swing and reasonable dorsiflexion during swing phase, enhancing all temporal gait parameters. The present results indicated that the developed AAFO might have more clinical benefits to treat foot drop and toe drag in hemiplegic patients, comparing with conventional AFOs.

Original languageEnglish
Title of host publicationi-CREATe 2007 - Proceedings of the 1st International Convention on Rehabilitation Engineering and Assistive Technology in Conjunction with 1st Tan Tock Seng Hospital Neurorehabilitation Meeting
Pages110-113
Number of pages4
DOIs
StatePublished - 2007
Externally publishedYes
Eventi-CREATe 2007 - 1st International Convention on Rehabilitation Engineering and Assistive Technology in Conjunction with 1st Tan Tock Seng Hospital Neurorehabilitation Meeting - Singapore, Singapore
Duration: Apr 23 2007Apr 26 2007

Publication series

Namei-CREATe 2007 - Proceedings of the 1st International Convention on Rehabilitation Engineering and Assistive Technology in Conjunction with 1st Tan Tock Seng Hospital Neurorehabilitation Meeting

Conference

Conferencei-CREATe 2007 - 1st International Convention on Rehabilitation Engineering and Assistive Technology in Conjunction with 1st Tan Tock Seng Hospital Neurorehabilitation Meeting
Country/TerritorySingapore
CitySingapore
Period04/23/0704/26/07

Keywords

  • 3D gait analysis
  • Active ankle-foot-orthosis
  • Foot drop
  • Hemiplegic Gait
  • Toe drag

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