Artificial-esophagus with peristaltic motion using shape memory alloy

Abstract

Artificial esophagus of less invasive medical applications utilizing mechanical property of shape memory alloys (SMAs) with peristaltic motion is developed. The artificial-esophagus is composed of two SMA springs, polyvinyl chloride tube, and acrylic plate. The dynamic characteristics of an artificial-esophagus actuator are evaluated in terms of the food transport capacity. Closing pressure and the transport speed have sufficiently realized with human-like qualities. The possibility for fully self-contained artificial-esophagus using SMAs is discussed.

Review of the swallowing system and process for a biologically mimicking swallowing robot

“…It has been characterized by Miki et al [66] (though of non-circumferential constriction) as having a maximum nominal internal bore diameter of 18 mm at its distended state. This is supported by the investigation of Orvar et al [67] where distensions of 20-23 mm diameter resulted in pain in healthy subjects.…”

“…9. Artificial esophagus concept [66]. and allow for some compliance like that observed in the biological system.…”

“…Miki et al [66] present an artificial esophagus prototype (Figs. 9 and 10) with an anatomically inspired internal diameter of 18 mm.…”

“…These have been inspired by the peristaltic transport mechanism. Devices have been constructed by Watanabe et al [96] and Miki et al [66] to recreate the peristaltic movement. Both models are based on Shape-Memory-Alloys (SMAs) which actively shrink on heating.…”

“…However, there has been recent interest in this field, with the development of a number of partial models and robotic devices. The research has primarily come out of Japan [66,[89][90][91][92][93][94][95][96], in conjunction with dental and hospital facilities. A number of biologically-inspired devices have been constructed to reproduce elements of this process, the inspiration of which contribute to the state of the art.…”