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Onyx LES is a device utilized for the pre-surgical embolization of arteriovenous malformations (AVMs). Onyx HD-500 is for the treatment of intracranial, saccular, sidewall aneurysms that present with a wide neck (greater than or equal to 4mm) or with a dome-to-neck ratio less than 2 that are not amenable to treatment with surgical clipping.
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