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Related Experiment Video

Updated: Jun 15, 2026

Constructing a Collagen Hydrogel for the Delivery of Stem Cell-loaded Chitosan Microspheres
09:39

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Published on: June 1, 2012

Highly spherical and deformable chitosan microspheres for arterial embolization.

Myung Joo Kang1, Jung Min Park, Woo Sik Choi

  • 1College of Pharmacy, Chung-Ang University, Seoul 156-756, Korea.

Chemical & Pharmaceutical Bulletin
|March 2, 2010
PubMed
Summary

Researchers developed new deformable chitosan microspheres for arterial embolization. These porous microspheres, created by removing poly(ethylene glycol), show promise for improved clinical delivery and effectiveness.

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Area of Science:

  • Biomaterials Engineering
  • Medical Device Fabrication
  • Interventional Radiology

Background:

  • Arterial embolization is a critical procedure in treating various vascular conditions.
  • Current embolic agents face limitations in deliverability and precise deployment.
  • Chitosan-based materials offer biocompatibility and tunable properties for biomedical applications.

Purpose of the Study:

  • To fabricate deformable chitosan (CS) microspheres for enhanced arterial embolization.
  • To create a highly porous structure within CS microspheres to achieve deformability.
  • To investigate the relationship between porosity, microsphere properties, and microcatheter deliverability.

Main Methods:

  • Fabrication of CS microspheres containing poly(ethylene glycol) (PEG) via ionotropic gelation.
  • Removal of PEG to create a porous structure, controlling porosity with CS/PEG blending ratios (100/0 to 15/85).
  • Evaluation of microsphere size, sphericity, porosity (via water retention), and microcatheter delivery performance.

Main Results:

  • Porous microspheres ranged from 500-600 µm with high sphericity (1.012-1.041).
  • Microporous networks were confirmed by SEM, with porosity increasing proportionally to initial PEG content.
  • Microspheres with >28% water retention demonstrated significant deformation and smooth passage through microcatheter tips.

Conclusions:

  • Deformable, porous chitosan microspheres were successfully fabricated.
  • The developed microspheres exhibit properties suitable for improved arterial embolization.
  • These novel microspheres are expected to have significant clinical applicability in embolization procedures.