Onyx

Dural
falco-tentorial arteriovenous fistula. SWI axial image depicts hypointense area secondary to Onyx.
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Dural
falco-tentorial arteriovenous fistula. Frontal fluoroscopy view of Onyx embolic material within arterio-venous dural fistula.
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Dural
falco-tentorial arteriovenous fistula. Lateral fluoroscopy view of Onyx treatment.
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Dural
falco-tentorial arteriovenous fistula. T1 VIBE after gadolinium enhancement axial image shows hypointense area due to Onyx and reveals little and persistent anterior arterial supply.
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Radiopaedia • CC-by-nc-sa 3.0 • de

Onyx is the trade name for a liquid embolic agent used in interventional radiology for the occlusion of blood vessels in embolization therapy. It is an elastic copolymer (ethylene vinyl alcohol copolymer (EVOH)), dissolved in dimethyl-sulfoxide (DMSO). Micronised tantalum powder is also added as an ingredient to provide radiopacity.

It comes in two strengths:

  • Onyx 18: 6% ethylene vinyl alcohol
  • Onyx 34: 8% ethylene vinyl alcohol

History and etymology

It was first described by Taki et al. in 1990 .

Siehe auch:
Assoziationen und Differentialdiagnosen zu Onyx:
Transarterielle
Chemoembolisation
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