Abstract: The stent graft system in accordance with the present invention has a trunk, a left subclavian tube, a left common carotid tube and a brachiocephalic tube. The trunk is tubular and expandable and has a descending end, an ascending end, a left subclavian mount, a left common carotid mount and a brachiocephalic mount, for receiving the aforementioned branch tubes that are elastic and self-expandable for respectively connecting the left subclavian artery, the left common carotid artery and the brachiocephalic artery to the trunk. With the above-described structure, the present invention allows fast determination of a suitable trunk and branch tubes for a patient and allows a medical institute to prepare compatible branch tubes and trunks for a composite stent graft system instead of numerous stent grafts of various combinations of differently sized tubular bodies and branches, wherein the former requires significantly less warehousing cost than the latter.

Abstract: A vascular cannula assembly has a cannula, a tube dilator, a supporting helix and an inflatable cuff. The cannula has a distal end, a proximal end, a passage and a drainage segment. The drainage segment has multiple draining apertures communicating with the passage. A valve mounted on the distal end of the cannula can prevent air from entering the cannula. The tube dilator is selectively mounted in the passage and has a leading end and a handling end respectively protruding from the distal end and proximal end of the cannula. The supporting helix is mounted in the passage against the cannula. The inflatable cuff is mounted around the cannula between the distal end and the drainage segment. The side tubing is connected to the inflatable cuff. Since the inflatable cuff can be inflated to occlude blood draining from vena cava, use of the vascular cannula assembly can prevent injuries by snaring or looping of vessels during surgical procedures for cardiopulmonary bypass.