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    • 3. 发明授权
    • Catheter positioning systems
    • 导管定位系统
    • US06629987B1
    • 2003-10-07
    • US09364520
    • 1999-07-30
    • Richard A. GambaleStephen J. ForcucciChirag B. ShahMichael F. WeiserSean Forde
    • Richard A. GambaleStephen J. ForcucciChirag B. ShahMichael F. WeiserSean Forde
    • A61M2900
    • A61M25/04A61B2017/3488A61M25/0084A61M2025/0087
    • The present invention provides a catheter positioning system which serves to control and stabilize a distal end of a catheter at a treatment site within a patient so that a medical procedure can be performed with accuracy. Generally, the positioning system operates by providing a deformable mechanical members at the distal end of the catheter which can be operated from the proximal end of the catheter to extend radially outward to engage surrounding tissue adjacent to treatment site. In one embodiment of the invention a flexible superstructure comprising the plurality of flexible veins extending longitudinally along the distal end of the catheter can be deformed to bow radially outward to engage surrounding tissue. The distal tip of the catheter joined to one of the veins was correspondingly displaced or rotated angularly as the veins bow outward. In another embodiment radially projecting fingers are joined to the distal end of the catheter, which remain retracted during navigation of the catheter to the treatment site then are extended outward to penetrate the tissue and secure the catheter at the treatment site upon being actuated from the proximal end of the catheter by a physician. Methods of positioning a catheter are also disclosed. The inventive device and method are particularly useful in catheter based procedures carried out in large body lumens or in cavities of body organs. In particular, the invention may be useful in delivering implants percutaneously through the left ventricle into the myocardium of the heart.
    • 本发明提供了一种导管定位系统,其用于控制​​和稳定患者内的治疗部位处的导管的远端,使得可以精确地执行医疗程序。 通常,定位系统通过在导管的远端处提供可变形的机械构件来操作,该可变形机械构件可以从导管的近端操作以径向向外延伸以接合邻近治疗部位的周围组织。 在本发明的一个实施例中,包括沿着导管的远端纵向延伸的多个柔性静脉的柔性上部结构可以变形以径向向外弯曲以接合周围的组织。 当静脉向外弯曲时,连接到静脉中的一个静脉的导管的远端相应地位移或旋转。 在另一个实施例中,径向突出的指状物连接到导管的远端,导管的远端在导管导航到治疗部位期间保持缩回,然后向外延伸以穿透组织,并且在从近端致动时将导管固定在治疗部位 导管的末端由医师。 还公开了定位导管的方法。 本发明的装置和方法特别适用于在大体腔或身体器官腔中进行的基于导管的程序。 特别地,本发明可用于将植入物通过左心室经皮穿入心脏心肌。
    • 5. 发明授权
    • Method and apparatus for regulating the fluid flow rate to and
preventing over-pressurization of a balloon catheter
    • 用于调节流体流速并防止球囊导管过度加压的方法和装置
    • US6110144A
    • 2000-08-29
    • US359805
    • 1999-07-26
    • Richard T. ChohJohn R. FaganStephen J. Forcucci
    • Richard T. ChohJohn R. FaganStephen J. Forcucci
    • A61F2/958A61M29/00
    • A61M25/10184A61M25/1018A61M2025/0001A61M2025/105
    • The invention relates to an apparatus and method for limiting the pressure of inflation fluid injected into a drug delivery catheter balloon, while permitting continuous and uninterrupted flow of such fluid to the balloon. The apparatus includes an elongated hollow housing having a fluid entrance, a fluid exit and a bore extending therebetween which forms an interconnecting chamber and passageway. A piston and piston shaft assembly is disposed inside the housing and is longitudinally movable within the chamber. The piston and piston shaft assembly is biased against the fluid pressure of the fluid entering the housing by a spring. The piston shaft has a distal end which extends toward the passageway inlet. As the incoming fluid pressure increases and approaches the predetermined maximum pressure level of the apparatus, the piston shaft distal end moves within the chamber against the biasing force of the spring toward a position adjacent the passageway inlet. When the incoming fluid pressure reaches and exceeds the predetermined maximum pressure level, the piston shaft distal end enters and extends into the passageway, thereby forming an annulus within the passageway. The annulus functions to restrict the flow rate and limit the pressure of the fluid exiting the housing and entering the catheter balloon.
    • 本发明涉及一种用于限制注射到药物递送导管球囊中的充气流体的压力的装置和方法,同时允许这种流体连续且不间断地流入气囊。 该装置包括细长的中空壳体,其具有流体入口,流体出口和在其间延伸的孔,其形成互连室和通道。 活塞和活塞轴组件设置在壳体内部并且可在腔室内纵向移动。 活塞和活塞轴组件被抵抗通过弹簧进入壳体的流体的流体压力而偏置。 活塞轴具有朝向通道入口延伸的远端。 当进入的流体压力增加并且接近装置的预定最大压力水平时,活塞轴远端抵抗弹簧的偏置力抵抗通道入口附近的位置移动。 当进入的流体压力达到并超过预定的最大压力水平时,活塞轴远端进入并延伸到通道中,从而在通道内形成环形空间。 环的作用是限制流速并限制离开壳体并进入导管气囊的流体的压力。