Method for providing a restenosis model in porcine coronary arteries
    6.
    发明授权
    Method for providing a restenosis model in porcine coronary arteries 失效
    在猪冠状动脉中提供再狭窄模型的方法

    公开(公告)号:US5304122A

    公开(公告)日:1994-04-19

    申请号:US981959

    申请日:1992-11-24

    IPC分类号: A61F2/06 A61F2/88 A61M31/00

    CPC分类号: A61F2/88

    摘要: A model of arterial restenosis in domestic pigs using deep injury to the coronary arterial media resulting in extensive proliferative response. Metal wire coils are delivered percutaneously to the coronary arteries of pigs with an oversized, high pressure (14 atm) balloon and left in place for 5-6 weeks. During placement, the balloon expands the coils and delivers them securely within the arterial lumen causing fracture of the internal elastic lamina by the coil. An extensive proliferative response occurs and is associated with a lumenal area narrowing of at least 50% Immunohistochemical studies confirms the prominence of smooth muscle cells in the tissue. The histopathologic features of the proliferative response are identical to those observed in cases of restenosis post-angioplasty.This model closely mimics the proliferative portion of human restenosis both grossly and microscopically. It may thus be useful for understanding human restenosis and for testing therapies aimed at preventing restenosis after balloon angioplasty or other coronary interventional procedures.

    摘要翻译: 家猪的动脉再狭窄模型,对冠状动脉介质使用深度损伤,导致广泛的增殖反应。 将金属丝线经皮经皮递送至具有超大,高压(14atm)气球的猪的冠状动脉,并留在原位5-6周。 在放置期间,气囊扩张线圈并将其牢固地传送到动脉管腔内,从而引起内部弹性层被线圈断裂。 发生广泛的增殖反应并且与至少50%的狭窄区域相关联。免疫组织化学研究证实了组织中平滑肌细胞的突出。 增殖反应的组织病理学特征与在血管成形术后再狭窄情况下观察到的组织病理学特征相同。 该模型严重和微观上模仿人类再狭窄的增殖部分。 因此,可能有助于了解人类再狭窄和用于测试旨在防止气囊血管成形术或其他冠状动脉介入手术后再狭窄的疗法。

    Releasable microcapsules on balloon catheters
    8.
    发明授权
    Releasable microcapsules on balloon catheters 失效
    球囊导管上可释放的微胶囊

    公开(公告)号:US5893840A

    公开(公告)日:1999-04-13

    申请号:US637112

    申请日:1996-04-24

    摘要: Balloon catheters are prepared to include body affecting chemicals within microcapsules on the exterior of the balloon either alone or with a stent. The coating releases from the balloon when the balloon is inflated into contact with the lumen to be treated. The device provides accurate placement of the dosage required at the location in need of treatment. A sheath may be employed over the balloon and microcapsules to prevent the microcapsules from being rubbed off during delivery through a body lumen. The catheters are especially useful in balloon angioplasty procedures.

    摘要翻译: 球囊导管准备包括单独或与支架在气囊外部的微胶囊内影响化学物质的物质。 当气球膨胀与待处理的内腔接触时,涂层从球囊释放。 该装置提供了在需要治疗的位置所需的剂量的准确放置。 可以在气囊和微胶囊上使用护套以防止在通过体腔输送期间微胶囊被摩擦。 导管在球囊血管成形术程序中特别有用。

    Temporary support for a body lumen and method
    9.
    发明授权
    Temporary support for a body lumen and method 失效
    支持体腔和方法

    公开(公告)号:US5484449A

    公开(公告)日:1996-01-16

    申请号:US167279

    申请日:1993-12-13

    摘要: A stent and catheter device for temporary support of body lumens. The stent has a generally cylindrical continuous winding providing radial support from within a body lumen after implantation which can be implanted and removed by a balloon catheter. The stent is provided with an elongated lead attached to the proximal end of the winding and means at a proximal end of the lead and remote from the winding for uncoiling the winding to facilitate its removal in an opened condition with minimal tissue damage. This stent and catheter device is especially useful as a temporary supporting device for repairing damage to blood vessels caused during angioplasty procedures.

    摘要翻译: 用于临时支撑体腔的支架和导管装置。 支架具有大体上圆柱形的连续绕组,其在植入后从体腔内提供径向支撑,其可以通过球囊导管植入和移除。 支架设置有细长的引线,其附接到绕组的近端,并且在引线的近端处的装置和远离绕组的装置,用于展开绕组,以便于在打开状态下以最小的组织损伤去除它。 该支架和导管装置特别可用作用于修复在血管成形术过程中引起的血管损伤的临时支撑装置。