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Related Experiment Video

Updated: Oct 4, 2025

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Shape-Anisotropic Microembolics Generated by Microfluidic Synthesis for Transarterial Embolization Treatment.

Yucheng Luo1, Yutao Ma1, Zijian Chen1,2

  • 1Shenzhen Key Laboratory of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.

Advanced Healthcare Materials
|February 2, 2022
PubMed
Summary

Researchers developed novel, capsule-shaped polyvinyl alcohol (PVA) microembolics for endovascular embolization. These non-spherical agents show improved navigation and stability compared to microspheres, offering a promising therapeutic platform.

Keywords:
embolization treatmentendovascular navigationmicrofluidic techniquespenetration depthsshape anisotropy

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Area of Science:

  • Biomaterials Engineering
  • Interventional Radiology
  • Vascular Surgery

Background:

  • Particulate embolic agents are crucial for endovascular embolization in treating various diseases.
  • The impact of particle shape on embolization performance remains under-investigated.
  • Developing shape-controlled microparticles is essential for optimizing therapeutic outcomes.

Purpose of the Study:

  • To develop polyvinyl alcohol (PVA)-based shape-anisotropic microembolics using microfluidics.
  • To investigate the embolization behaviors of these non-spherical microembolics in vitro and in vivo.
  • To compare the performance of shape-anisotropic microembolics against spherical ones.

Main Methods:

  • Fabrication of PVA microembolics via droplet-based microfluidics with PVA-glutaraldehyde crosslinking.
  • Precise control of microembolic shape (nearly capsule) by adjusting surfactant concentration and flow rates.
  • Evaluation using in vitro decellularized rabbit liver and in vivo rabbit ear embolization models.

Main Results:

  • Successfully fabricated PVA microembolics with controlled, nearly capsule shapes.
  • Non-spherical microembolics exhibited superior endovascular navigation and penetration depth compared to microspheres.
  • Elongated microembolics demonstrated enhanced embolization stability due to their radial diameter and contact area.

Conclusions:

  • Shape-anisotropic microembolics offer significant advantages over spherical counterparts in endovascular embolization.
  • The developed PVA microembolics provide a promising platform for shape-guided therapeutic effects.
  • This approach advances the field of interventional embolotherapy through tailored particle design.