Artificial esophagus with peristaltic movement

Makoto Watanabe, Kazumitsu Sekine, Yoshio Hori, Yasuyuki Shiraishi, Takeshi Maeda, Dai Honma, Go Miyata, Yoshifumi Saijo, Tomoyuki Yambe

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


In this study, we have developed an artificial esophagus simulating peristaltic movement with the use of a nickel-titanium shape memory alloy (NiTi-SMA) actuator. Serial pairs of NiTi-SMAs were placed around a Gore-Tex vascular graft in a helical position such that they obliterated the lumen of the vessel when they contracted. In an animal experiment using a goat, the cervical esophagus was resected over a length of approximately 20 cm. The artificial esophagus was anastomosed with the remaining cervical esophagus. When a direct current of 500 mA at 5 V was applied to the NiTi-SMAs, the first pair of the NiTi-SMA contracted. The following pairs of the NiTi-SMAs contracted consecutively. The entire contraction of the artificial esophagus was similar to the esophageal peristaltic movement observed by x-ray examination in humans. The results showed the possibility that the artificial esophagus could function as an artificial esophagus having peristaltic movement.

Original languageEnglish
Pages (from-to)158-161
Number of pages4
JournalASAIO Journal
Issue number2
Publication statusPublished - 2005 Mar


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