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"The azygos vein was used for catheter access in the setting of an occluded right internal jugular vein, bilateral innominate, and superior vena cava" Santini et al (2021).

Azygos vein central venous access

Abstract:

This is a report of a 45-year-old female with thoracic central venous obstruction (TCVO) and alpha-1 antitrypsin deficiency requiring an implanted port for infusions. The azygos vein was used for catheter access in the setting of an occluded right internal jugular vein, bilateral innominate, and superior vena cava. A literature review examines the etiology of TCVO and superior vena cava syndrome (SVC), as well as the potential benefits and complications for using the azygos vein in patients with TCVO requiring port or catheter venous access.

Reference:

Santini A, Veith C, Mousa A. Azygos Vein Central Venous Access in a Patient with Thoracic Central Venous Obstruction. Ann Vasc Surg. 2021 Oct 10:S0890-5096(21)00677-4. doi: 10.1016/j.avsg.2021.07.031. Epub ahead of print. PMID: 34644629.