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    • 10. 发明授权
    • Device and method for selectively removing a thrombus filter
    • 用于选择性去除血栓过滤器的装置和方法
    • US06342063B1
    • 2002-01-29
    • US09491273
    • 2000-01-26
    • Robert B. DeVriesHannah Shu KimNaroun SounForrest D. WhitcherMark W. Wolfson
    • Robert B. DeVriesHannah Shu KimNaroun SounForrest D. WhitcherMark W. Wolfson
    • A61M2900
    • A61F2/01A61F2002/016A61F2230/005A61F2230/0067A61F2250/0071
    • A thrombus filter which can be securely fixed in a selected location in the vascular system of a patient and removed when no longer required. The thrombus filter includes a plurality of struts which radiate from a body portion to form the generally conical shape of the thrombus filter. The thrombus filter includes anchor members joined to the free end of each strut. The thrombus filter includes an insulating layer substantially covering the thrombus filter including the body portion, the struts and the anchor members. The insulating layer includes an opening proximate the anchor members. The opening in the insulating layer creates a conductive path between the thrombus filter and the patient's body. When removal of the thrombus filter is desired, a first electrical conductor forms an electrical connection with the body portion of the thrombus filter. A second electrical conductor forms an electrical connection with the patient's body. A power supply is used to selectively apply a voltage differential between the thrombus filter and the body of the patient. This voltage differential induces an electrical current the flow of electrical current between the thrombus filter and the patient's blood causes the electrolytic corrosion of the thrombus filter proximate the opening in the insulating layer. When the bond between the struts of the thrombus filter and the anchors is cut through or weakened, the thrombus filter may be pulled into the lumen of a retrieval catheter. Removal of the thrombus filter from the patient's body is completed by withdrawing the retrieval catheter from the patient's blood vessel.
    • 一种血栓过滤器,其可以牢固地固定在患者的血管系统中的选定位置,并且在不再需要时被去除。 血栓过滤器包括从主体部分辐射以形成血栓过滤器的大致圆锥形状的多个支柱。 血栓过滤器包括连接到每个支柱的自由端的锚定构件。 血栓过滤器包括基本上覆盖包括主体部分,支柱和锚定构件的血栓过滤器的绝缘层。 绝缘层包括靠近锚构件的开口。 绝缘层中的开口在血栓过滤器和患者身体之间形成导电路径。 当需要去除血栓过滤器时,第一电导体与血栓过滤器的主体部分形成电连接。 第二电导体与患者的身体形成电连接。 使用电源来选择性地在血栓过滤器和患者身体之间施加电压差。 该电压差引起电流,血栓过滤器和患者血液之间的电流流动导致邻近绝缘层开口处的血栓过滤器的电解腐蚀。 当血栓过滤器的支柱和锚固件之间的连接被切断或削弱时,血栓过滤器可以被拉入回收导管的内腔。 通过从患者血管中取出取出导管来完成从患者体内去除血栓滤过器。