| 摘要 |
<p>A stent is created in situ at a stenosed site in a blood vessel from a flowable material which is delivered in a porous, flexible angioplasty balloon. The flowable material is extruded in place into a mold cavity formed by the porous surface of the angioplasty balloon and the surrounding endovascular wall. The flowable material can include a radiopaque marker and is capable of changing phase to a solid upon the application of energy above a predetermined threshold. When the flowable material has been extruded into the mold cavity, energy is applied to solidify the material and to interlink the stent material with fissures and breaks in the endovascular wall. The balloon is then withdrawn leaving a fully formed stent having a central lumen for enhanced blood flow. Including a radiopaque stent material in the stent allows for direct fluoroscopic visualization for enhanced control over the positioning and formation of the stent. A radiopaque stent also provides the advantage of enhanced long term observation of the stent.</p> |
