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    • 9. 发明申请
    • Longitudinally expanding medical device
    • 纵向扩张医疗器械
    • US20040193283A1
    • 2004-09-30
    • US10400200
    • 2003-03-26
    • Scimed Life Systems, Inc.
    • Robert RiouxKen Daignault
    • A61F002/04
    • A61M25/04A61F2/82A61F2002/047A61M25/0012A61M25/0017A61M25/005A61M25/0068A61M25/0102A61M2025/0024
    • A stent for maintaining an open passageway through a body lumen, such as the prostatic urethra of a male patient, includes an elongated segment including a flexible polymer material bridging a plurality of hoops. The elongated segment defines a lumen extending therethrough and has a distal end. A retention structure may be coupled to the distal end of the elongated segment to inhibit the distal end from migrating when the stent is placed within a body of a patient. The flexible polymer material is disposed between the plurality of hoops, thereby creating hinged members that allow for the spaces between the hoops to expand and contract longitudinally to accommodate prostatic swelling when the stent is placed within the prostatic urethra of the patient. A plurality of ridges is disposed along the elongated segment at locations where the flexible material circumscribes the hoops, and these inhibit migration of the stent and facilitate longitudinal expansion by frictionally engaging adjacent tissue, such as the inner wall of the prostatic urethra.
    • 用于保持通过体腔(例如男性患者的前列腺尿道)的开放通道的支架包括细长段,其包括桥接多个环的柔性聚合物材料。 细长段限定延伸穿过其中的内腔并具有远端。 保持结构可以联接到细长段的远端,以在支架放置在患者体内时阻止远端移动。 柔性聚合物材料设置在多个环之间,由此产生铰链构件,当铰链构件放置在患者的前列腺尿道内时,允许箍之间的空间纵向膨胀和收缩以适应前列腺肿胀。 在柔性材料围绕环的位置处,沿着细长部分设置多个脊,并且这些脊抑制支架的移动,并且通过摩擦接合相邻组织(例如前列腺尿道的内壁)来促进纵向膨胀。