Thoraco-abdominal aortic aneurysm (TAAA) repair is a complicated and challenging surgery with high chances of unpredictable post-operative outcomes. This is a case of a 56-year man electively admitted for De Bakey type III TAAA repair. The case was done with the one-lung ventilation (OLV) technique by using a bronchial blocker. The other unique thing which was done in this case was the use of a lumbar drain for spinal cord protection. The patient had a prolonged hospital stay but ultimately recovered and was discharged home after two and a half months. Key Words: Lumber drain, Spinal cord injury, Aortic aneurysm surgery.