W.L. Gore has achieved a broader FDA approval for its endovascular graft-repair device. The Flagstaff, AZ, company's TAG thoracic endoprosthesis won regulators' blessing for use in acute and chronic Type B dissections of the descending thoracic aorta. Translated, the device is now the only one to win FDA backing for use in aneurysm, trauma and dissection. Surgeons deliver the device via a cathether, by way of a small groin incision. After that, it is guided up the leg artery, through the abdomen, into the chest and finally the implantation site. Item