A self-propelled inflatable earthworm-like endoscope actuated by single supply line

Area of Science:

• Biomedical Engineering
• Medical Devices
• Robotics

Background:

• Self-propelling endoscopes aim to improve medical examinations and patient comfort.
• Existing designs often involve complex mechanisms or electronics.

Purpose of the Study:

• To develop a fully automatic, self-propelling endoscope system using a multiple-balloon design.
• To demonstrate peristaltic locomotion controlled by a single supply channel.

Main Methods:

• Development of a multiple-balloon system with serially connected elastic balloons.
• Utilizing nonlinear pressure-radius characteristics for balloon control with constant inlet pressure.
• Employing small orifices to control fluid flow dynamics and create peristaltic motion.
• Mathematical modeling, simulation, and experimental validation of a prototype.

Main Results:

• The system achieves peristaltic locomotion using a single supply channel and no moving parts or electronics.
• Disposable silicone components manufactured via injection molding ensure low cost and scalability.
• Experimental results in a straight cylinder closely correlate with simulation predictions.

Conclusions:

• The developed multiple-balloon system offers a cost-effective, simple, and effective solution for self-propelling endoscopy.
• This technology has potential for various biomedical applications requiring minimally invasive exploration.
• The design's reliance on fluid dynamics simplifies operation and reduces potential failure points.