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公开(公告)号：US4850351A
公开(公告)日：1989-07-25
申请号：US934629
申请日：1986-11-25
CPC分类号： A61B18/245 , A61B2018/2238 , A61B2090/3933 , Y10T74/20444 , Y10T74/20456
摘要： A catheter having optical fibers for delivering laser energy to a blood vessel to remove obstructions in the blood vessel is adapted to be guided controllably and selectively by a guide wire to the site to be treated. The catheter includes a central lumen which is open at the distal end of the catheter and which receives the guide wire so that the catheter may be advanced over the guide wire. A relatively few number of optical fibers are contained within and extend longitudinally of the catheter wall. The distal tip of the catheter is provided with a cylindrical optically transparent end cap and means are provided to securely mount the distal ends of the optical fibers with respect to the end cap so that the light emitted from the ends of the fibers passes through the cylindrical wall of the end cap and is emitted at the distal emissions face of the end cap. The catheter embodies a special construction of an inner catheter core and a surrounding sheath which provides for a high degree of flexibility to enable the catheter to be passed through tortuous passages in a patient's vasculature. The inner core is formed from a plurality of articulated segments and is surrounded by a thin flexible sheath. Longitudinal flutes formed along the articulated segments of the core receive and retain the optical fibers in a manner which permits the fibers, sheath and core to shift longitudinally with respect to each other to provide a very high degree of flexibility for the composition catheter.
摘要翻译： 具有用于将激光能量传送到血管以去除血管中的障碍物的光纤的导管适于通过导丝被可控地和选择性地引导到待治疗部位。 该导管包括中心腔，其在导管的远端处是开口的，并且其接收导丝，使得导管可以在导丝上前进。 相对较少数量的光纤被容纳在导管壁的内部并且在导管壁的纵向延伸。 导管的远端设置有圆柱形光学透明端盖，并且提供装置以相对于端盖牢固地安装光纤的远端，使得从纤维的端部发射的光穿过圆柱形 端盖的壁并在端盖的远端排放面处发射。 导管体现了内导管芯和周围护套的特殊构造，其提供高度的柔性以使导管能够通过患者脉管系统中的曲折通道。 内芯由多个铰接段形成并被薄的柔性护套包围。 沿着芯的铰接段形成的纵向凹槽以允许纤维，护套和芯相对于彼此纵向移动的方式接收和保持光纤，以为组合物导管提供非常高的柔性。
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