Embolization Agent

Embolization of lesions in the peripheral and neurovasculature, including arteriovenous malformations and hypervascular tumors.


A unique solution for pre-surgical embolization of arteriovenous malformations and Hypervascular tumors.

Libro is a non-adhesive EVOH-based liquid embolic agent for the embolization of peripheral and neurovascular Arteriovenous Malformations and Hypervascular tumors.


Detailed specifications

Libro is a nonadhesive liquid embolic agent for embolization of brain and Peripheral Arteriovenous Malformations (AVM) and hypervascular tumors. It is composed of EVOH (ethylene vinyl alcohol copolymer) with suspended micronized Tantalum powder for radiopacity and DMSO (dimethyl sulfoxide) solvent that provides complete filling and distal penetration of peripheral and neurovascular lesions. Its non-adhesive properties permit more distal nidus embolization without significant risk of catheter entrapment, while higher viscosities allow for controlled deployment

Libro must be injected through a DMSO-compatible microcatheter.

DMSO solvent dissipates into the blood, causing the EVOH copolymer and suspended tantalum to precipitate in situ into a spongy, coherent embolus.


Provides Controlled Delivery

Slow controlled injection and delivery method

Ability to start and stop injections (pauses should not exceed 2 minutes)

Adhesive deposition and delivery

Provides the user with excellent visibility

Controlled angiography during embolic injection

Libro immediately forms a skin as the polymeric embolus solidifies from the outside to the inside, while traveling more distally in the lesion.

  • Libro is available in three product formulations, Libro (6% EVOH),
  • Libro (6.5% EVOH) and Libro (8% EVOH):
  • Libro (6% EVOH), Libro (6.5% EVOH) Recommended when feeding pedicle injections will be conducted close to the nidus.
  • LibroⓇ (8% EVOH): Recommended for embolizing higher flow and larger fistulous components.


  • Neuro & Peripheral Aneurysms and AVMs
  • Intracranial aneurysms, endoleaks
  • Short procedure time.
  • High power visibility
  • Micronized grain size of tantalum powder
Order Number Product Solvent Percentage Adhesivity Volume
ON1005 Libro 18 DMSO %6.0 Non-Adhesive 1.5 cc
ON1006 Libro 20 DMSO %6.5 Non-Adhesive 1.5 cc
ON1007 Libro 34 DMSO %8.0 Non-Adhesive 1.5 cc