| 摘要 |
In the occurrence of arterial outgrowth stenosis, the first option is the intraluminal balloon dilatation (percutaneous intraluminal angioplasty) usually followed by the placement of an intravascular stent serving for retaining the atheroma on the arterial wall. However, in some cases of outgrowth angiodilatation, chiefly in big vessels (e.g. aortic arch), intimae separation hazard could incite destructive results. In precarious cases, there is proposed the placement of a nitinol thermal-memory stent manifesting at its last centimetre retrievable memory via fins deployable in vertical disposition to the stent’s axis. The figure A depicts the stent before its incorporation to the specific catheter one part of which constitutes a tubular self-dilated stent 1 and the other peripheral radii (fins) 2 susceptible to extend in vertical relationship to the stent’s axis (fig.B). The whole construction is incorporated to the catheter and guided via a sheath as dictated by all existing intraluminal devices. The figure B depicts the angular stent contracted and incorporated to the specific catheter; the figure &Ggr;α depicts the complication caused by the separation of the intimae (e.g. aortic arch); the &Ggr;&bgr; depicts the cure of this complication so that the deployment of the fins of the stent-after placement of this last at the stenosis level 3 for retaining the intima on the arterial wall- ensures the effectiveness of the invented intraluminal stent. |
