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Related Experiment Videos

A cyclically actuated electrolytic drug delivery device.

Ying Yi1, Ulrich Buttner, Ian G Foulds

  • 1School of Engineering, University of British Columbia, Kelowna, British Columbia, Canada. ying.yi@alumni.ubc.ca.

Lab on a Chip
|July 23, 2015
PubMed
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This study introduces a novel implantable drug delivery system with an electrolytic pump featuring a catalytic reformer and cyclical actuation. This innovation enhances drug release performance and device longevity for long-term therapies.

Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Drug Delivery Systems

Background:

  • Implantable drug delivery systems require precise control over release rates and extended operational lifetimes.
  • Existing technologies face challenges in achieving reproducible drug dissolution and sustained therapeutic delivery.
  • The development of miniaturized, efficient, and long-lasting drug pumps is crucial for advanced medical treatments.

Purpose of the Study:

  • To present the first prototype of an implantable electrolytic pump integrating a catalytic reformer and cyclical actuation.
  • To demonstrate improved drug release performance and extended device lifetime through novel design features.
  • To validate the feasibility of the solid-drug-in-reservoir (SDR) approach for reproducible, long-term drug dissolution and delivery.

Main Methods:

Related Experiment Videos

  • Development of a prototype electrolytic pump incorporating a platinum (Pt)-coated carbon fiber mesh as a catalytic reforming element.
  • Implementation of a cyclically actuated mode for drug release, leveraging faster recombination rates for shorter cycling times.
  • Utilizing a solid-drug-in-reservoir (SDR) method for dissolving solid drugs in human fluid to create stable solutions.
  • Conducting proof-of-principle drug delivery studies using solvent blue 38 as a model substance.

Main Results:

  • The catalytic reformer and cyclical actuation significantly improved release performance and device lifetime.
  • The SDR approach enabled reproducible drug solution formation for sustained therapies.
  • Proof-of-principle studies demonstrated power-controlled and pulsatile release profiles.
  • Achieved a stable drug delivery rate of 11.44 ± 0.56 μg min⁻¹ with an input power of 4 mW over multiple pulses.

Conclusions:

  • The developed implantable electrolytic pump represents a significant advancement in drug delivery technology.
  • The integrated catalytic reformer and cyclical actuation offer enhanced control and longevity.
  • The SDR approach provides a viable method for reproducible, long-term drug administration.
  • The system's stability and controlled release capabilities confirm its potential for clinical applications.