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Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
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Bio-inspired circular soft actuators for simulating defecation process of human rectum.

Zebing Mao1, Sota Suzuki2, Ardi Wiranata3

  • 1Faculty of Engineering, Yamaguchi University, Yamaguchi, Japan. mao.z.aa@yamaguchi-u.ac.jp.

Journal of Artificial Organs : the Official Journal of the Japanese Society for Artificial Organs
|October 23, 2024
PubMed
Summary

Researchers developed soft muscle actuators and rectum models to simulate defecation. The third actuator type showed superior performance, demonstrating potential for soft robotics in biomedical applications.

Keywords:
BiomimeticDefecationHuman rectumSoft actuators

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Area of Science:

  • Biomedical Engineering
  • Soft Robotics
  • Digestive System Simulation

Background:

  • Soft robots are increasingly used in medicine for rehabilitation, grasping, and artificial organs.
  • The rectum, a key part of the digestive system, has been overlooked in robotic simulations due to societal stigma.
  • Existing research lacks models for simulating the defecation process.

Purpose of the Study:

  • To address the gap in simulating the defecation process by developing soft circular muscle actuators (CMAs) and rectum models.
  • To design, fabricate, and test novel soft CMAs for replicating rectal function.
  • To evaluate the performance of different CMA designs in simulating defecation.

Main Methods:

  • Fabrication of soft rectum models and CMAs using flexible materials.
  • Design and testing of three distinct types of CMAs.
  • Utilizing a pneumatic system for actuator control.
  • Synthesizing simulated stool using sodium alginate and calcium chloride.

Main Results:

  • The third type of soft CMA demonstrated superior pressure generation capabilities.
  • Maximum area contraction achieved with the optimal actuator reached a value of 1.
  • Successful simulation of the defecation process was achieved using the developed soft actuators and models.

Conclusions:

  • The developed soft CMAs and rectum models effectively replicate the defecation process.
  • The study highlights the significant potential of soft actuators in advanced biomedical applications.
  • This research provides a foundation for future advancements in soft robotics for digestive system simulation and other medical fields.