2014年7月24日 · Onyx appears as a homogeneous hyperdense material at CT and radiography, conforming to the curvilinear or branching pattern of the vessels embolized. Onyx may also appear as radiodense nodular clumps when used in greater volumes, typically seen with embolization of saccular aneurysms.

Onyx was developed for embolization of central nervous system AVMs but is increasingly used extracranially because of its unique physical properties. We review our experience and results with the use of Onyx for the treatment of fast-flow extracranial vascular lesions.

Onyx appears radiodense at CT and plain radiography and has a curvilinear pattern following the expected path of the vessel embolized. At CT, Onyx creates streak artefact that may obstruct the view of surrounding tissues consistent with descriptions of other tantalum devices.

The purpose of this study is to assess the degree of artifacts induced by the liquid embolic agents Onyx (Medtronic Neurovascular, Irvine, CA, USA) and PHIL in conventional computed tomography (CT), cone-beam CT and magnetic resonance imaging (MRI) in …

CONCLUSIONS: Staged Onyx embolization was clinically efficacious in managing extracranial fast-flow vascular malformations and lesions, with low associated morbidity. ABBREVIATIONS: AVF arteriovenous fistula; AVM arteriovenous malformation; DMSO

2015年3月1日 · Onyx appears as a homogeneous hyperdense material at CT and radiography, conforming to the curvilinear or branching pattern of the vessels embolized. Onyx may also appear as radiodense nodular clumps when used in greater volumes, typically seen with embolization of saccular aneurysms.

We review our experience and results with the use of Onyx for the treatment of fast-flow extracranial vascular lesions. Materials and methods: We retrospectively analyzed clinical and imaging records of 22 patients who underwent 71 extracranial embolizations from March 2007 through January 2010.

Head computed tomography (CT) at admission showed Fisher grade 3 subarachnoid hemorrhage that was distributed unevenly in the left posterior cranial fossa along with intraventricular hemorrhage (Figure 1).

Our patient presented with a thunderclap headache in June 2021. He underwent a CT head, which revealed a cerebellar hemorrhage. Subsequent CT angiography and DSA confirmed a high-flow posterior fossa dAVF and demonstrated arterial supply and venous drainage. There was no embolization of Onyx visible during procedural fluoroscopy screening.

2019年3月18日 · Onyx™ is a liquid, non-adhesive embolic agent, which is ideal for slow, targeted injections. It has been used in intracranial aneurysms and arteriovenous malformations (7 – 9). With technological progress, its use has been expanded to and established in the management of cerebral pseudoaneurysm (10, 11).