Refillable and magnetically actuated drug delivery system using pear-shaped viscoelastic membrane

Area of Science:

• Biomedical Engineering
• Materials Science
• Drug Delivery Systems

Background:

• Localized diseases require precise drug delivery for efficacy and reduced side effects.
• Existing drug delivery systems often lack on-demand control or require complex mechanisms.
• Valveless and refillable systems are desirable for improved patient compliance and usability.

Purpose of the Study:

• To develop and characterize a novel refillable and valveless drug delivery device.
• To demonstrate on-demand drug release actuated by an external magnetic field.
• To investigate the controlled discharge of therapeutic agents for localized disease treatment.

Main Methods:

• Design of a dome-shaped drug reservoir with a pear-shaped viscoelastic magnetic membrane.
• Actuation of the membrane using an external magnetic field (up to 500 mT).
• Quantification of drug release based on magnetic field strength and number of actuations.

Main Results:

• The device achieved controlled drug release via magnetic actuation of the membrane.
• Maximum drug release of 18 ± 1.5 μg per actuation was observed at 500 mT.
• Variable drug doses were successfully controlled by adjusting magnetic field parameters and actuations.

Conclusions:

• The developed magnetic drug delivery device enables precise, on-demand medication release.
• The valveless, refillable design presents a promising platform for localized disease therapy.
• Further optimization could enhance therapeutic outcomes and patient-specific dosing.