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    • 21. 发明申请
    • MAGNETIC CELL DELIVERY
    • 磁性细胞传递
    • US20080294232A1
    • 2008-11-27
    • US12121774
    • 2008-05-15
    • Raju R. Viswanathan
    • Raju R. Viswanathan
    • A61F2/06A61N2/00
    • A61F2/90A61B5/06A61B5/4839A61B6/12A61F2210/009A61K9/0019A61K9/5094
    • Systems and methods of delivering magnetically loaded cells to target areas within a patient are described. Cells rendered magnetically attractable by being loaded with magnetic microparticles are delivered from a hollow interventional device distal tip and attracted towards a previously placed implant. Implants, such as stents, are magnetized by application of a magnetic field sequence; magnetized cells are attracted by the local magnetic domains and associated field gradients within the implant, and adhere to and are retained by the local tissues, such as tissue protrusions through a stent struts. Application of a magnetic field or field gradient sequence concurrently with the magnetic cell delivery facilitates pulling the cells away from the lumen axis and towards the implant surface and vessel or organ walls.
    • 描述了将磁负载细胞递送到患者内的目标区域的系统和方法。 通过装载磁性微粒而呈磁力吸引的细胞从中空的介入装置远端引出并被吸引到先前放置的植入物上。 植入物,如支架,通过施加磁场序列被磁化; 磁化的细胞被植入物内的局部磁畴和相关的场梯度吸引,并且粘附并被局部组织保留,例如通过支架支柱的组织突起。 与磁性细胞递送同时施加磁场或场梯度序列有助于将细胞从管腔轴向并且朝向植入物表面和血管或器官壁延伸。
    • 22. 发明申请
    • Single Catheter Navigation for Diagnosis and Treatment of Arrhythmias
    • 单导管导航用于诊断和治疗心律失常
    • US20080200913A1
    • 2008-08-21
    • US12023020
    • 2008-01-30
    • Raju R. Viswanathan
    • Raju R. Viswanathan
    • A61B18/14
    • A61B18/1492A61B34/10A61B34/73A61B2018/00351A61B2018/00839
    • A method of conducting a therapeutic ablation of cardiac tissue based upon local electrical signals in the tissue. The method includes navigating at least one electrophysiology catheter to a plurality of locations on the surface of the heart using a remote navigation system; sensing the electrical activity in the heart tissue at a plurality of the locations in the heart; and storing a value representative of the control variables of the remote navigation system at the location and a value representative of the electrical signal at the location; displaying a representation of at least some of the locations where the electrical activity was sensed on a display using graphic indicators of the timing of the sensed activity relative to the reference; determining the location at which the sensed electrical activity is earliest relative to a reference electrocardiogram signal; and automatically navigating an electrophysiology catheter to a position relative to selected location, and ablating tissue at the location with the electrophysiology catheter.
    • 基于组织中的局部电信号进行心脏组织治疗性消融的方法。 该方法包括使用远程导航系统将至少一个电生理学导管导航到心脏表面上的多个位置; 感测心脏中多个位置处的心脏组织中的电活动; 以及将表示所述远程导航系统的控制变量的值存储在所述位置处,并且在所述位置处存储代表所述电信号的值; 使用感测到的活动的相对于参考的定时的图形指示来显示在显示器上感测到电活动的至少一些位置的表示; 确定所感测的电活动相对于参考心电图信号最早的位置; 并且将电生理导管自动导航到相对于所选位置的位置,以及用所述电生理学导管在所述位置处消融组织。
    • 29. 发明授权
    • Stent delivery guide wire
    • 支架输送导丝
    • US08348858B2
    • 2013-01-08
    • US11325680
    • 2006-01-04
    • Raju R. ViswanathanJonathan C. Sell
    • Raju R. ViswanathanJonathan C. Sell
    • A61B5/00
    • A61M25/09A61F2/958A61F2002/9583A61F2210/009A61M25/0127
    • A guide wire for magnetically navigating a medical device through in a subject's body comprising an elongate wire having a proximal and distal end, a portion adjacent the distal end that is more flexible than the more proximal portions of the elongate wire, and a first magnetically responsive element on the distal end of the elongate wire. The guide wire further comprises one or more magnetically responsive elements spaced apart from the first magnetically responsive element and disposed on the more flexible portion of the elongate wire. The guide wire provides for bending or deflecting the distal end of the stent, to provide easier navigation of the distal end of the guide wire and the stent through the vasculature of a subject body.
    • 一种用于磁性导航医疗装置通过被检体的引导线,包括具有近端和远端的细长线,与远端相邻的部分比细长线的较近端部更柔性,以及第一磁性响应 细长丝线的远端上的元件。 引导线还包括一个或多个与第一磁响应元件间隔开的并且设置在细长线的更柔性部分上的磁响应元件。 引导线用于弯曲或偏转支架的远端,以便通过主体的脉管系统提供引导线和支架远端的更容易的导航。