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    • 7. 发明授权
    • Catheter core wire
    • 导管芯线
    • US06355016B1
    • 2002-03-12
    • US09253971
    • 1999-02-22
    • Celso J. BagaoisanKetan P. MuniGholam-Reza Zadno-AziziSivette LamJuan T. DomingoIsaac J. KimSamuel L. OmalekiJefferey C. Bleam
    • Celso J. BagaoisanKetan P. MuniGholam-Reza Zadno-AziziSivette LamJuan T. DomingoIsaac J. KimSamuel L. OmalekiJefferey C. Bleam
    • A61M2900
    • A61M25/104A61M25/09A61M25/09033A61M2025/09175A61M2025/1093C22F1/006
    • Disclosed herein is an improved core wire for use in a medical catheter. In one aspect, a tapering core wire is incorporated into the distal end of a catheter. The catheter has a tubular body. Both ends of an inflatable balloon are mounted to the tubular body. The core wire extends from the distal end of the tubular body. In one embodiment, substantially all of the taper of the core wire occurs in the extending portion of the core wire over a length of at least 15 mm but no more than 60 mm. In another aspect, a core wire with a shapeable tip and method of manufacturing the same are provided. A core wire previously made superelastic is subject to additional processing to remove its superelasticity thereby allowing the material to be shapeable to aid in advancing the core wire through a blood vessel or other body cavities. In another aspect of the present invention, a method is provided for securing the core wire to the distal end of an elongated catheter tubular body. The tubular body is mechanically crimped onto the core wire to secure the core wire in place. This crimping method has been found to increase the strength of the bond between the core wire and the catheter tube so that greater pull force is required to break the core wire off from the catheter.
    • 本文公开了一种用于医疗导管的改进的芯线。 在一个方面,锥形芯线被并入导管的远端。 导管具有管状体。 可充气气囊的两端安装在管状体上。 芯线从管状体的远端延伸。 在一个实施例中,芯线的基本上所有的锥形在芯线的延伸部分中发生长度至少为15mm但不大于60mm。 另一方面,提供了具有可成形尖端的芯线及其制造方法。 预先制成超弹性的芯线经受额外的处理以去除其超弹性,从而允许材料可成型以帮助将芯线推进通过血管或其它体腔。 在本发明的另一方面,提供了一种用于将芯线固定到细长导管管体的远端的方法。 将管状体机械地压接在芯线上以将芯线固定到位。 已经发现这种卷曲方法增加了芯线和导管之间的结合强度,使得需要更大的拉力来将芯线从导管断开。