OBJECTIVETo study the anatomical characteristics about ascending aortic and aortic arch in Chinese population by CT.

METHODSFrom September 2006 to September 2007, 388 patients free of current known aortic pathology undergone thoracic aorta CTA. The diameter of ascending aorta, aortic arch, and branch vessels of aortic arch were measured respectively by AW4.2 work station. The data base about all the measurements was set up. The CHISS statistical software was used to analysis data.

RESULTSThe aortic diameter above coronary artery (CA), the level at origin of and brachiocephalic trunk (BCT), the halfway of the ascending aorta, the level at origin of left common carotid artery (LCCA), the level at origin of left subclavian artery (LSA) and the level at distal of origin of LSA respectively were (34 +/- 5) mm, (34 +/- 5) mm, (33 +/- 4) mm, (30 +/- 4) mm, (28 +/- 3) mm and (26 +/- 3) mm. The diameters of two level between the origin of BCT and right subclavian artery (RSA) were (13.1 +/- 1.9) mm and (12.8 +/- 2.3) mm. Diameters of two level at LCCA were (8.7 +/- 1.5) mm and (7.9 +/- 1.0) mm. The diameters of two level between the origin of LSA and left vertebral artery were (10.7 +/- 1.7) mm and (9.3 +/- 1.3) mm. The aortic lumina length between the origin of CA and BCT was (5.3 +/- 1.2) cm, the aortic lumina length between the origin of BCT and LCCA was (1.3 +/- 0.4) cm, the lumen length between origin of BCT and RSA was (4.1 +/- 0.8) cm, the lumen length between origin of LSA and left vertebral artery was (3.8 +/- 0.8) cm. The distance between the wall of BCT and LCCA was (0.4 +/- 0.2) cm, the distance between the wall of LCCA and LSA was (0.7 +/- 0.6) cm.

CONCLUSIONSModular branched stent-graft system is fit for most part of the Chinese. The size fit for human could be got on this basic.