FLAGSTAFF, Ariz.--(BUSINESS WIRE)--W.L. Gore & Associates (Gore) announced today the first patient case involving the revolutionary GORE® DrySeal Sheath. The sheath aids in minimally invasive treatment for patients with abdominal aortic aneurysms (AAA) with the GORE® EXCLUDER® AAA Endoprosthesis and thoracic aortic aneurysms (TAA) with the GORE® TAG® Thoracic Endoprosthesis. The successful procedure was performed by Alan Lumsden, M.D., chairman of the Department of Cardiovascular Surgery, The Methodist Hospital (TMH) in Houston, TX, during a Gore-sponsored Acute Symptomatic AAA Workshop conducted in The Methodist DeBakey Heart and Vascular Center.