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    • 4. 发明申请
    • METHODS AND APPARATUS FOR INTRAVASCULARLY-INDUCED NEUROMODULATION
    • 用于血管内诱导神经调节的方法和装置
    • WO2007086965A2
    • 2007-08-02
    • PCT/US2006/041889
    • 2006-10-26
    • ARDIAN, INC.DEMARAIS, DeniseZADNO, NicolasCLARK, Benjamin, J.THAI, Erik
    • DEMARAIS, DeniseZADNO, NicolasCLARK, Benjamin, J.THAI, Erik
    • A61N1/00
    • A61B18/1492A61B17/12136A61B2018/00083A61B2018/00285A61B2018/00434A61B2018/00613A61M25/0108A61M25/10A61N1/327A61N1/36007A61N1/36121A61N1/36182A61N1/37205A61N1/40
    • Methods and apparatus are provided for intravascularly-induced neuromodulation using a pulsed electric field, e.g., to effectuate irreversible electroporation or electrofusion, necrosis and/or inducement of apoptosis, alteration of gene expression, changes in cytokine upregulation, etc., in target neural fibers. In some embodiments, the intravascular PEF system comprises a catheter having a pair of bipolar electrodes for delivering the PEF, with a first electrode positioned on a first side of an impedance-altering element and a second electrode positioned on an opposing side of the impedance-altering element. A length of the electrodes, as well as a separation distance between the first and second electrodes, may be specified such that, with the impedance-altering element deployed in a manner that locally increases impedance within a patient's vessel, e.g., with the impedance-altering element deployed into contact with the vessel wall at a treatment site within the patient's vasculature, a magnitude of applied voltage delivered across the bipolar electrodes necessary to achieve desired neuromodulation is reduced relative to an intravascular PEF system having similarly spaced electrodes but no (or an undeployed) impedance-altering element. In a preferred embodiment, the impedance-altering element comprises an inflatable balloon configured to locally increase impedance within a patient's vasculature. The methods and apparatus of the present invention may be used to modulate a neural fiber that contributes to renal function.
    • 提供了使用脉冲电场进行血管内诱导的神经调节的方法和装置,例如,在靶神经纤维中实现不可逆的电穿孔或电融合,坏死和/或诱导细胞凋亡,基因表达的改变,细胞因子上调的变化等 。 在一些实施例中,血管内PEF系统包括导管,其具有用于传送PEF的一对双极电极,第一电极位于阻抗改变元件的第一侧上,第二电极位于阻抗变换元件的相对侧上, 改变元素 可以规定电极的长度以及第一和第二电极之间的间隔距离,使得以阻抗变化元件部署的方式,其局部地增加患者血管内的阻抗,例如阻抗 - 改变元件被部署成与病人血管系统中的治疗部位处的血管壁接触,相对于具有类似间隔开的电极而没有(或一个或多个)的血管内PEF系统,减少了实现所需神经调节所需双极电极的施加电压的大小 未部署)阻抗变化元件。 在优选实施例中,阻抗改变元件包括构造成在患者的脉管系统内局部增加阻抗的可充气球囊。 本发明的方法和装置可用于调节有助于肾功能的神经纤维。
    • 5. 发明申请
    • METHODS AND APPARATUS FOR INDUCING CONTROLLED RENAL NEUROMODULATION
    • 诱导控制性肾脏神经调节的方法和装置
    • WO2007035537A2
    • 2007-03-29
    • PCT/US2006036120
    • 2006-09-14
    • ARDIAN INCDEMARAIS DENISEZADNO NICOLAS
    • DEMARAIS DENISEZADNO NICOLAS
    • A61N1/00
    • A61N1/327A61N1/0514A61N1/08A61N1/36007
    • Methods and apparatus are provided for inducing, monitoring and controlling renal neuromodulation using a pulsed electric field to effectuate electroporation or electrofusion. In some embodiments, tissue impedance, conductance or conductivity may be monitored to determine the effects of pulsed electric field therapy, e.g., to determine an extent of electroporation and its degree of irreversibility. Pulsed electric field electroporation of tissue causes a decrease in tissue impedance and an increase in tissue conductivity. If induced electroporation is reversible, upon cessation of the pulsed electric field, tissue impedance and conductivity should approximate baseline levels; however, if electroporation is irreversible, impedance and conductivity changes should persist. Thus, monitoring of impedance or conductivity may be utilized to determine the onset of electroporation and to determine the type or extent of electroporation. Furthermore, monitoring data may be used in one or more manual or automatic feedback loops to control the electroporation.
    • 提供了使用脉冲电场诱导,监测和控制肾神经调节以实现电穿孔或电融合的方法和装置。 在一些实施例中,可以监测组织阻抗,电导或电导率以确定脉冲电场治疗的效果,例如确定电穿孔的程度及其不可逆程度。 组织的脉冲电场电穿孔导致组织阻抗的减少和组织传导性的增加。 如果诱导电穿孔是可逆的,则在停止脉冲电场后,组织阻抗和电导率应接近基线水平; 然而,如果电穿孔是不可逆的,阻抗和电导率的变化应该持续存在。 因此,可以使用阻抗或电导率的监测来确定电穿孔的发生并确定电穿孔的类型或程度。 此外,可以在一个或多个手动或自动反馈回路中使用监测数据来控制电穿孔。