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    • 54. 发明授权
    • Method and device for applications of selective organ cooling
    • US06582455B1
    • 2003-06-24
    • US09621051
    • 2000-07-21
    • John D. Dobak, IIIJuan C. LasherasRandell L. Werneth
    • John D. Dobak, IIIJuan C. LasherasRandell L. Werneth
    • A61F700
    • A61F7/12A61F2007/0056A61F2007/126
    • The invention provides a method and device for selectively controlling the temperature of a selected organ of a patient for performance of a specified application. The method includes introducing a guide catheter into a blood vessel. The guide catheter may have a soft tip and a retaining flange, and may be used to provide treatments such as administration of thrombolytic drug therapies, stenting procedures, angiographic procedures, etc. A supply tube is provided having a heat transfer element attached to a distal end thereof. The heat transfer element having a plurality of exterior surface irregularities, these surface irregularities having a depth greater than the boundary layer thickness of flow in the feeding artery of the selected organ. The supply tube and heat transfer element may be inserted through the guide catheter to place the heat transfer element in the feeding artery of the selected organ. Turbulence is created around the surface irregularities at a distance from the heat transfer element greater than the boundary layer thickness of flow in the feeding artery, thereby creating turbulence throughout the blood flow in the feeding artery. A working fluid is circulated into the heat transfer element via the supply tube and via an internal lumen of the heat transfer element. The fluid may be circulated out of the heat transfer element via an external lumen of the heat transfer element and through the guide catheter. Heat is thereby transferred between the heat transfer element and the blood in the feeding artery to selectively control the temperature of the selected organ during or soon before or after the specified application.
    • 57. 发明授权
    • Method and device for applications of selective organ cooling
    • 选择性器官冷却应用的方法和装置
    • US06491716B2
    • 2002-12-10
    • US09246788
    • 1999-02-09
    • John D. Dobak IIIJuan C. LasherasRandell L. Werneth
    • John D. Dobak IIIJuan C. LasherasRandell L. Werneth
    • A61F700
    • A61F7/12A61B2018/0212A61B2018/0262A61F2007/0056A61F2007/126
    • The invention provides a method and device for heating or cooling a surrounding fluid in a feeding vessel. The device includes a catheter assembly capable of insertion to a selected feeding vessel in the vascular system of a patient. The assembly includes a heat transfer element at a distal end of the catheter assembly, the heat transfer element having a plurality of exterior surface irregularities shaped and arranged to create turbulence in a surrounding fluid, the surface irregularities having a depth at least equal to the boundary layer thickness of flow of the surrounding fluid in the feeding vessel. The assembly also includes a supply catheter to deliver a working fluid to an interior of the heat transfer element, a return catheter to return a working fluid from the interior of the heat transfer element, and a drug delivery catheter running substantially parallel to the axis of the catheter assembly. The method includes selectively controlling the temperature of a selected volume of blood in a patient by introducing a catheter assembly into a blood vessel feeding a selected volume of blood in a patient and delivering a working fluid through a supply catheter in the catheter assembly and returning the working fluid through a return catheter in the catheter assembly. Heat is transferred between a heat transfer element forming a distal end of the catheter assembly and the volume of blood in the feeding vessel. A liquid, such as a drug, is delivered through a drug delivery catheter to the volume of blood in the feeding vessel.
    • 本发明提供一种用于加热或冷却进料容器中的周围流体的方法和装置。 该装置包括能够插入患者血管系统中的选定进料容器的导管组件。 所述组件包括在所述导管组件的远端处的传热元件,所述传热元件具有多个外表面凹凸,其形状和布置成在周围流体中产生湍流,所述表面凹凸具有至少等于所述边界的深度 进料容器中周围流体的流动层厚度。 该组件还包括供应导管,用于将工作流体输送到传热元件的内部;返回导管,用于从工作流体从传热元件的内部返回;以及药物输送导管,其基本上平行于 导管组件。 该方法包括通过将导管组件引入供给患者中选定体积的血液的血管中并通过导管组件中的供应导管输送工作流体来选择性地控制患者体内所选体积的血液的温度, 工作流体通过导管组件中的返回导管。 在形成导管组件的远端的传热元件和进料容器中的血液体积之间传递热量。 诸如药物的液体通过药物输送导管递送到进料容器中的血液体积。
    • 59. 发明授权
    • Balloon modification for improved stent fixation and deployment
    • 球囊修改用于改进支架固定和部署
    • US5913871A
    • 1999-06-22
    • US723084
    • 1996-09-25
    • Randell L. WernethJohn J. BridgemanGary E. Currie
    • Randell L. WernethJohn J. BridgemanGary E. Currie
    • A61F2/06A61F2/84A61M29/00
    • A61F2/958A61M25/1027A61F2002/9583A61M2025/1086A61M2025/1088
    • An intravascular catheter system and method of manufacture for implanting a radially expandable stent within a body vessel. The catheter system comprises a shaft defining an inflation lumen in fluid communication with a balloon on the distal end of the shaft. A stent is mounted coaxially upon a balloon. The balloon has ridges impressed in the outline of the stent for at least a portion of the stent. The ridges are sized to receive the stent so as to cause the balloon to expand evenly and the stent to deploy uniformly. In an alternative embodiment the balloon may additionally have a polymeric surface layer exhibiting a higher coefficient of friction than the underlying material against the stent material. The surface layer may be provided as a high friction polymeric coating on a formed balloon or as a coaxial extrusion of a high friction polymeric material over the underlying balloon tubing material. In a further embodiment the balloon may have the polymeric surface layer exhibiting a higher coefficient of friction than the underlying material against the stent material but without the ridges.
    • 一种血管内导管系统和用于在体内容器内植入可径向扩张的支架的制造方法。 该导管系统包括一个轴,该轴限定与轴的远端上的球囊流体连通的充气腔。 支架同轴安装在气球上。 气囊在至少一部分支架的支架轮廓上留下了凹凸。 脊的尺寸被设计成接收支架,以使球囊均匀地膨胀,支架均匀地展开。 在替代实施例中,球囊可另外具有聚合物表面层,该聚合物表面层具有比相对于支架材料的下面的材料更高的摩擦系数。 表面层可以作为高度摩擦的聚合物涂层提供在形成的气囊上或作为高摩擦聚合物材料在下面的气囊管材料上的同轴挤出。 在另一个实施方案中,气囊可以具有聚合物表面层,其表现出比针对支架材料的下面的材料更高的摩擦系数,但没有脊。