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Modified-Release Drug Delivery Systems: Rate-Programmed II01:19

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Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...
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Hydrogels in controlled release formulations: network design and mathematical modeling.

Chien-Chi Lin1, Andrew T Metters

  • 1Department of Bioengineering, Clemson University, Clemson, SC 29634, USA.

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Hydrogel technology advances biomedical applications like controlled drug delivery. This review covers hydrogel design, release mechanisms, and mathematical modeling for optimized drug release systems.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Pharmaceutical Sciences

Background:

  • Hydrogel technologies have significantly advanced biomedical applications, particularly in controlled drug delivery.
  • Novel hydrogel matrices are continuously developed to meet evolving pharmaceutical and medical demands.
  • Mathematical modeling is crucial for optimizing hydrogel network design and understanding molecule release.

Purpose of the Study:

  • To review fundamental principles and recent advancements in hydrogel network design.
  • To explore mathematical modeling approaches for controlled molecule release from hydrogels.
  • To discuss emerging hydrogel delivery systems and associated modeling challenges.

Main Methods:

  • Review of existing literature on hydrogel technology and controlled release.
  • Analysis of hydrogel design criteria for controlled release applications.
  • Examination of various molecule release mechanisms (diffusion, swelling, chemical control).

Main Results:

  • Hydrogels play niche roles in controlled release, with specific design criteria for applications.
  • Novel hydrogel systems include biodegradable, smart, and biomimetic materials for drug delivery.
  • Key release mechanisms from hydrogel systems are diffusion, swelling, and chemically-controlled processes.

Conclusions:

  • Understanding hydrogel design and release mechanisms is vital for effective drug delivery systems.
  • Mathematical modeling aids in predicting and optimizing hydrogel performance.
  • Emerging hydrogel delivery systems present new opportunities and modeling challenges.