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. 2021 Jan;9(1):78. doi: 10.21037/atm-20-2862

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2021 Annals of Translational Medicine. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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Venography of the SCV indicated the blood flow before and after the dilation balloon. (A,B) Venography indicated a fornix-shaped membrane (black arrow) at the proximal segment of the SCV without signs of thrombosis. The blood flow was almost completely obstructed by the membrane. There were no obvious collaterals around the occlusion. (C) The membrane was gradually dilated using an 8–40 mm balloon and a 12–40 mm balloon. (D) After dilation, the blood flow in the SCV was recovered with residual stenosis of less than 30%. SCV, subclavian vein.