Piezoresistivity modeling of soft tissue electrical-mechanical properties: A validation study

Jing Guo, Min He, Zhichao Li, Shuting Cai, Xiaoming Xiong, Zhuoqi Cheng*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In general, the electrical property of soft tissues is sensitive to the force applied to their surface. To further study the relationship between the force and the electrical property of soft tissues, this paper attempts to investigate the effect of static and higher-order stresses on electrical properties. Overall, a practical experimental platform is designed to acquire the force information and the electrical property of soft tissues during a contact procedure, which is featured different compression stimuli, such as constant pressing force, constant pressing speed, and step-force compression, etc. Furthermore, the piezoresistive characteristic is innovatively introduced to model the mechanical-electrical properties of soft tissue. Finite Element Modeling (FEM) is adopted to fit the static piezoresistivity of the soft tissue. Finally, experimental studies were performed to demonstrate the effect of stress on the electrical properties and the feasibility of the proposed piezoresistive model to describe soft tissues’ mechanical and electrical properties.

Original languageEnglish
JournalJournal of Engineering in Medicine
Volume237
Issue number8
Pages (from-to)936–945
ISSN0954-4119
DOIs
Publication statusPublished - Aug 2023

Keywords

  • Electrical bioimpedance
  • instrumentation design
  • piezoresistivity
  • tissue modeling

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