Lumbar drains are a mainstay for spinal cord protection when patients undergo operations like thoracoabdominal aortic aneurysm (TAAA) repairs and thoracic endovascular aortic repairs (TEVAR) with subclavian artery debranching. Why? Because the anterior spinal artery receives contributions from paired intercostal arteries that can be disrupted by the aortic pathology itself in addition to the operation …