A smart pill for drug delivery with sensing capabilities

Area of Science:

• Biomedical Engineering
• Drug Delivery Systems
• Medical Devices

Background:

• Local drug delivery systems are crucial for targeted therapy.
• Existing systems face challenges in precise control and tissue interaction.
• Swallowable devices offer a minimally invasive approach for gastrointestinal applications.

Purpose of the Study:

• To develop and describe a novel swallowable capsule system for controlled local drug delivery.
• To investigate the actuation mechanism of an electrolysis-based micropump for drug expulsion.
• To integrate an impedance sensor for real-time physiological monitoring and feedback control.

Main Methods:

• A micropump system actuated by electrolysis of a water-based solution was designed.
• An elastic membrane separates the electrolytic chamber from the drug reservoir.
• The capsule incorporates an impedance sensor to measure tissue conditions.
• Electrolytically generated gases create pressure to displace the membrane and expel the drug through a nozzle.

Main Results:

• The electrolysis-based micropump successfully generated pressure for drug delivery.
• The elastic membrane effectively transferred pressure from the gas reservoir to the drug reservoir.
• The integrated impedance sensor provided data on local tissue conditions.
• The system demonstrated potential for controlled, on-demand drug release.

Conclusions:

• The developed swallowable capsule system offers a novel approach for localized drug delivery.
• Electrolysis-based micropump actuation is a viable mechanism for controlled drug release.
• Integration of impedance sensing enables adaptive control for enhanced therapeutic efficacy.