Semin intervent Radiol 2015; 32(04): 343-348
DOI: 10.1055/s-0035-1564809
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Hydrogel-Coated Coils: Product Description and Clinical Applications

Hector Ferral
1  Department of Radiology, Section of Interventional Radiology, NorthShore University HealthSystem, Evanston, Illinois
› Author Affiliations
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Publication History

Publication Date:
10 November 2015 (online)


Hydrogel-coated coils are truly detachable coils with a platinum core covered with hydrogel. The coils are available in 0.018- and 0.035-in systems. These coils have the ability to expand up to four times their size ∼20 minutes after deployment, thus providing a very effective mechanical vascular occlusion effect. The vessel-occlusive effect of these coils is a volume, space-occupying effect, not a thrombotic effect, as seen in fibered coils. Hydrogel-coated coils were originally developed and designed to treat brain aneurysms; however, their use has expanded to peripheral applications. Hydrogel-coated coils have been used in the management of visceral aneurysms, high-flow vascular arteriovenous fistulae, and endoleaks after endovascular thoracic and abdominal aneurysm repair. The purpose of this article is to describe the hydrogel-coated coil system, the mechanism of action, technical details for optimal deployment, and clinical applications.