Design of a rate controlled indentor for In Vivo analysis of residual limb tissues

Arvind Pathak, B. E. Pathak, M. Barbara Silver-Thorn

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A tissue tester was designed to enable rate controlled indentation of the soft tissues of the residual limbs of below-knee (BK) amputees. Thus viscoelastic phenomena such as pre-conditioning, hysteresis and stress relaxation could be assessed. The tissue tester accommodates indentor excursions of 0-30 mm, performs indentations at rates from 0-5 mm/s, measures reaction forces up to 44 N, and accommodates multiple loading/unloading cycles. The tissue tester is controlled via a notebook personal computer which makes the entire test system portable and amenable for use in a clinical or research environment The system output consists of force-displacement curves obtained during cyclic loading of the tissue at varying indentation rates at sites of clinical significance to BK prosthetic design. Indentation followed by force monitoring over a fixed time duration allows stress relaxation of the tissue to be assessed. The indentor positioning error (mean error less than 4.4%) is independent of indentor position and load, but dependent on indentation rate. Indentation rates are accurate to within 3% of the desired value and are independent of indentor position and load.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED
Pages111-112
Number of pages2
Volume33
StatePublished - 1996
Externally publishedYes

Fingerprint

Indentation
Tissue
Stress relaxation
Laptop computers
Prosthetics
Unloading
Personal computers
Hysteresis
Monitoring

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Pathak, A., Pathak, B. E., & Barbara Silver-Thorn, M. (1996). Design of a rate controlled indentor for In Vivo analysis of residual limb tissues. In American Society of Mechanical Engineers, Bioengineering Division (Publication) BED (Vol. 33, pp. 111-112)

Design of a rate controlled indentor for In Vivo analysis of residual limb tissues. / Pathak, Arvind; Pathak, B. E.; Barbara Silver-Thorn, M.

American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 33 1996. p. 111-112.

Research output: Chapter in Book/Report/Conference proceedingChapter

Pathak, A, Pathak, BE & Barbara Silver-Thorn, M 1996, Design of a rate controlled indentor for In Vivo analysis of residual limb tissues. in American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. vol. 33, pp. 111-112.
Pathak A, Pathak BE, Barbara Silver-Thorn M. Design of a rate controlled indentor for In Vivo analysis of residual limb tissues. In American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 33. 1996. p. 111-112
Pathak, Arvind ; Pathak, B. E. ; Barbara Silver-Thorn, M. / Design of a rate controlled indentor for In Vivo analysis of residual limb tissues. American Society of Mechanical Engineers, Bioengineering Division (Publication) BED. Vol. 33 1996. pp. 111-112
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