An implantable artificial esophagus to propel food simulating natural anatomical esophageal function

Yasunori Taira, Yasuyuki Shiraishi, Hidekazu Miura, Tomoyuki Yambe, Dai Homma, Kuroudo Kamiya, Go Miyata

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)


We have been developing implantable esophagus devices to achieve dynamic assistance in food-taking function for the patients suffering from esophageal cancer. Promotion of the quality of life as well as the activity of daily lives of the patients with severe esophageal cancer so that the esophageal tubular restoration by stenting or gastroesophagotomy are often carried out in order to ameliorate self-digestive function. Some patients with those severe cancer have difficulty to make food deliver smoothly due to the lack of peristaltic motions in the lesion. In this study, we presented a new structure of an artificial esophagus which was capable of delivering foods from a mouth to stomach with a distributed mechanism. We examined the natural esophageal specimens in order to obtain a relationship between volume and pressure. Prior to the measurement of mechanical characteristics of the natural specimen, the portions of esophagus were freshly extracted from goats after the experiments. Then we modeled the characteristics of natural esophageal functions through a digestive process from the anatomical, biomechanical point of view and confirmed the functional distribution in the artificial esophagus that could drive the contents from proximal to distal. A new structural design for the proximal esophageal portion was also developed to achieve squeezing motion by using a shape memory alloy fiber as an actuator and its dynamic characteristics were tested.

Original languageEnglish
Title of host publication2015 10th Asian Control Conference
Subtitle of host publicationEmerging Control Techniques for a Sustainable World, ASCC 2015
EditorsHazlina Selamat, Hafiz Rashidi Haruna Ramli, Ahmad Athif Mohd Faudzi, Ribhan Zafira Abdul Rahman, Asnor Juraiza Ishak, Azura Che Soh, Siti Anom Ahmad
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479978625
Publication statusPublished - 2015 Sept 8
Event10th Asian Control Conference, ASCC 2015 - Kota Kinabalu, Malaysia
Duration: 2015 May 312015 Jun 3

Publication series

Name2015 10th Asian Control Conference: Emerging Control Techniques for a Sustainable World, ASCC 2015


Conference10th Asian Control Conference, ASCC 2015
CityKota Kinabalu


  • artificial esophagus
  • biomechanical esophageal properties
  • distributed system
  • shape memory alloy fiber
  • squeezing motion


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