| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a structural security for minimizing hazard in a blood vessel having aneurysm by a method wherein a long axis member is arranged having an external surface, a first end, a second end and an internal surface to regulate a long axis lumen and a means is provided on the internal surface thereof to increase flow velocity of the long axis lumen and an opening part is arranged for communication between the external surface and the long axis lumen by a fluid. SOLUTION: A prosthesis 11 arranged in a blood vessel 1 has a long axis member 12 which has an external surface 13, an internal surface 16, a first end 14 and a second end 15 and the internal surface 16 regulates the long axis lumen 17. The internal surface 16 is provided with a means 18 to increase the flow velocity of a blood 5 passing through the long axis lumen 17 and the means 18 is so arranged to be a smooth taper finished drawn structure. The existence of the drawn structure causes a rise in the flow velocity of the blood 5, ensuring a drop in the normal pressure. The drop in the normal pressure temperature associated with the rise in the flow velocity is known as venturi effect. The blood 5 flows to the long axis lumen 17 from an aneurysmal sac 6 through a number of opening parts 19 for communication between the external surface 13 and the long axis lumen 17 by a fluid thereby reducing an internal pressure for the aneurysmal sac 6.</p> |
