Oscillation and reaction board techniques for estimating inertial properties of a below-knee prosthesis.

Jeremy D. Smith, Abbie E. Ferris, Gary D. Heise, Richard N. Hinrichs, Philip E. Martin

Research output: Contribution to journalArticle

Abstract

The purpose of this study was two-fold: (1) demonstrate a technique that can be used to directly estimate the inertial properties of a below-knee prosthesis, and (2) contrast the effects of the proposed technique and that of using intact limb inertial properties on joint kinetic estimates during walking in unilateral, transtibial amputees. An oscillation and reaction board system was validated and shown to be reliable when measuring inertial properties of known geometrical solids. When direct measurements of inertial properties of the prosthesis were used in inverse dynamics modeling of the lower extremity compared with inertial estimates based on an intact shank and foot, joint kinetics at the hip and knee were significantly lower during the swing phase of walking. Differences in joint kinetics during stance, however, were smaller than those observed during swing. Therefore, researchers focusing on the swing phase of walking should consider the impact of prosthesis inertia property estimates on study outcomes. For stance, either one of the two inertial models investigated in our study would likely lead to similar outcomes with an inverse dynamics assessment.

Original languageEnglish (US)
JournalJournal of visualized experiments : JoVE
Issue number87
StatePublished - 2014

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Knee prostheses
Knee Prosthesis
Walking
Kinetics
Prostheses and Implants
Joints
Foot Joints
Amputees
Hip
Lower Extremity
Knee
Extremities
Research Personnel
Outcome Assessment (Health Care)

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Oscillation and reaction board techniques for estimating inertial properties of a below-knee prosthesis. / Smith, Jeremy D.; Ferris, Abbie E.; Heise, Gary D.; Hinrichs, Richard N.; Martin, Philip E.

In: Journal of visualized experiments : JoVE, No. 87, 2014.

Research output: Contribution to journalArticle

Smith, Jeremy D. ; Ferris, Abbie E. ; Heise, Gary D. ; Hinrichs, Richard N. ; Martin, Philip E. / Oscillation and reaction board techniques for estimating inertial properties of a below-knee prosthesis. In: Journal of visualized experiments : JoVE. 2014 ; No. 87.
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