Property evaluation of an artificial esophagus with peristaltic motion using shape memory alloy

Hiroyuki Miki, Takeshi Okuyama, Shingo Kodaira, Yun Luo, Toshiyuki Takagi, Tomoyuki Yambe

Research output: Contribution to journalArticlepeer-review


The purpose of this paper is to propose a novel peristaltic motion actuator for an artificial esophagus using shape memory alloys (SMAs). SMAs are known as functional materials having large deformation characteristics and recovery forces which have the advantage of having large specific output energy to weight. Utilizing this characteristic features, the designed artificial esophagus was small enough to be implanted. The artificial esophagus proposed in this study is composed of two SMA micro coils, a silicon tube which simulates an esophagus, and a set of polyvinyl chloride resin and acrylic plastic for sandwiching the silicon tube. Its closing pressure is experimentally measured, and carrying capacity is verified using pseudo masticated food with controlled switching circuit. Based on their results, its feasibility is discussed.

Original languageEnglish
Pages (from-to)1560-1566
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number766
Publication statusPublished - 2010 Jun


  • Actuator
  • Artificial esophagus
  • Biomechanics
  • Medical engineering
  • Motion control
  • Peristaltic mechanism
  • Shape memory alloy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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