The Bicêtre occlusion scale is well suited to assess the efficacy of the Contour embolization device
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Updated: Jul 17, 2025
Occlusion of the Great and Small Saphenous Vein Using Copolymeric Glue Based on N-Butyl Cyanoacrylate and Methacryloxy Sulfolane
Published on: December 9, 2022
Jildaz Caroff1, Jonathan Cortese2, Francesco D'Argento3
1Department of Interventional Neuroradiology - NEURI Brain Vascular Center, Bicêtre Hospital, APHP, Paris Saclay University, 78 Rue du General Leclerc, Le Kremlin-Bicêtre, France; INSERM U1176, Bicêtre Hospital, 78 Rue du General Leclerc, Le Kremlin-Bicêtre, France.
Background:
The Contour Embolization Device (CED) is typically assessed using coiling angiographic outcomes. However, these scales do not address device-specific problematics. We evaluated the usability of the Bicêtre occlusion scale (BOS) with the CED.
Results:
BOS scores can be analyzed as BOSS 0 = no residual flow, BOSS 1 = residual flow inside the CED but with complete neck-sealing, BOSS 2 = neck-remnant, BOSS 3 = aneurysm-remnant, BOSS 1 + 3 = contrast filling inside the device and aneurysmal sac without complete neck-sealing.
Conclusion:
BOS usage should be encouraged as it provides a more comprehensive assessment of the mechanism of CED occlusion, especially considering the potential prognostic value of the neck sealing assessment.
