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Related Experiment Videos

Endovascular electrocoagulation: concept, technique, and experimental results

C Ji1, G Guglielmi, H Chen

  • 1Leo G. Rigler Center for Radiological Research, University of California at Los Angeles Medical School, USA.

AJNR. American Journal of Neuroradiology
|November 21, 1997
PubMed
Summary

This study shows that endovascular electrocoagulation using platinum coils and radio frequency (RF) energy is a safe and effective method for rapid vessel occlusion. The technique achieved fast, targeted embolization without complications in swine models.

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Area of Science:

  • Interventional Radiology
  • Vascular Surgery
  • Biomedical Engineering

Background:

  • Embolotherapy is crucial for treating various vascular conditions.
  • Achieving rapid and precise vessel occlusion, especially in small, distal vessels, remains a challenge.
  • Existing techniques may have limitations in speed, control, or applicability to small lumens.

Purpose of the Study:

  • To assess the safety and efficacy of a novel embolotherapeutic technique.
  • The technique utilizes electrolytically detachable platinum coils and radio frequency (RF) energy.
  • The goal is to achieve rapid and distal occlusion of targeted vessels.

Main Methods:

  • Endovascular electrocoagulation was performed in swine models.
  • Branches of the ascending cervical and hepatic arteries (≤1.5 mm) were targeted.

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  • Modified Guglielmi detachable platinum coils delivered RF energy for ohmic heating and occlusion, then detached electrolytically.

    • Main Results:

    • Rapid and superselective occlusion of all targeted vessels was achieved.
    • No instances of arterial rupture, dissection, unintended occlusion, or coil migration were observed.
    • Histologic examination at 6 and 12 weeks confirmed vessel lumen obliteration by the platinum microcoil and surrounding granulation tissue.

    Conclusions:

    • Endovascular electrocoagulation offers a rapid method for achieving vessel occlusion.
    • This technique demonstrates potential as a controllable embolotherapeutic option.
    • It is particularly suitable when expeditious occlusion of small vessels and distal superselectivity are required.