Development of a Sensor to Measure Stump/Socket Interfacial Shear Stresses in a Lower-Extremity Amputee

Chang Yong Ko, Seong Guk Kim, Young Kuen Cho, Daewon Lee, Dong Hyun Kim, Jeicheong Ryu, Dohyung Lim, Han Sung Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The aim of this study was to develop and validate a sensor to measure interfacial shear forces on the residual limb in the socket of lower-extremity amputees. The sensor consisted of three layers: upper and lower layers made from aluminum, and a middle layer made from polyvinyl chloride. One strain gauge was placed in the middle layer with an elastomer to overcome the nonlinear response properties. In a clinical application, a male transtibial amputee (42 years old, 82 kg, 182 cm) was asked to walk on level ground and on a 5° slope. The interfacial shear force on the stump/socket on the medial and lateral distal residual limb was measured. The shear sensor (28 mm × 16 mm × 3.5 mm), which was validated using weights, showed high linearity and sensitivity (measurement range: –10 to 10 N). A shear force was exerted on the residual limb throughout a gait. Additionally, the vertical shear forces were found to depend on the ground while the horizontal shear forces depended on the prosthetic socket site. In conclusion, a shear sensor of comparable volume may be useful for measuring the interfacial shear force on the stump/socket in lower-extremity amputees.

Original languageEnglish
Pages (from-to)899-905
Number of pages7
JournalInternational Journal of Precision Engineering and Manufacturing
Volume19
Issue number6
DOIs
Publication statusPublished - 2018 Jun 1

Bibliographical note

Funding Information:
This research was supported by BK21PLUS (Center for Human Resource Development for Bio Medical Wellness Convergence) Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education.

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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