| 摘要 |
A tubular vascular transplant (1, 1′, 1″, 1′″) serves for connecting vessels in the human body. The transplant, in particular made of expanded polytetrafluoroethylene (ePTFE), can preferably be used for an arteriovenous shunt for carrying out a dialysis. The transplant is connected by its first, proximal end to a vessel, for example an artery (2), and by its distal end to another location of the same vessel or to a different vessel, for example a vein (3). The lumen of the transplant (1, 1′, 1″, and 1′″) widens in a steadily conical manner in the region of its distal end and forms a diffuser (8) there. The cone angle (a) of the wall of the diffuser (8) with respect to the central flow direction of the blood in the transplant (1′, 1″, 1′″) is preferably 6° to 7°. In the region of the diffuser (8), preferably at least one, preferably planar, dividing wall (11, 11′, 11a, and 11b) is provided, running in the central flow direction of the blood. This makes it possible to prevent the formation of an intimal hyperplasia and a pseudointima. |
