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    • 5. 发明授权
    • Catheter system
    • US06730077B2
    • 2004-05-04
    • US10237376
    • 2002-09-09
    • Sean CarrollGeorge KleinMarwan AbboudSteven G. ArlessFredric L. MilderDan Wittenberger
    • Sean CarrollGeorge KleinMarwan AbboudSteven G. ArlessFredric L. MilderDan Wittenberger
    • A61B1802
    • A61B18/02A61B18/1492A61B2017/00026A61B2017/00084A61B2018/0212A61B2018/0262A61B2090/065
    • A cryocatheter for treatment of tissue has a tip adapted to provide a signal indicative of the quality and/or orientation of the tip contact with surrounding tissue. In one embodiment, a signal conductor extends through the catheter to the tip and connects to a thermally and electrically conductive shell or cap that applies an RF current to the region of tissue contacted by the tip. The tissue impedance path between the signal lead and a surface electrode mounted on the patient's skin is monitored to develop a quantitative measure of tissue contact at the distal tip, which is preferably displayed on the screen of a catheter monitoring console. In yet a further embodiment, the catheter is provided with a split tip having temperature monitoring sensors, such as thermistors, mounted on opposed halves of the tip so as to sense temperature on two sides of the catheter axis. The thermistor signals are processed to determine and display differential temperature between the two sides of the tip, thus revealing which side lies in contact. In yet a further aspect of the first embodiment, two separate and distinct high frequency electrical signals are applied to the two halves of a split metal shell or cap at the tip. Signals received at the surface electrode are filtered into first and second frequency components, and these are processed to determine the relative magnitude of the signal or the impedance of the path for each of the injected signals to determine and display the tissue contact orientation of the catheter. The catheter preferably has two separate cooling chambers within the cooling tip, positioned with one chamber on each side of the axis, and a separate cooling inlet to each chamber is switched on by a valve which directs the flow of coolant to the contact side during active cryotreatment. In another embodiment, the cap provides an RF electrode that may be opposed to the cooling side so that either the cryogenic or the RF ablation side may be rotated into contact to selectively heat or cool, or in representative protocol treat, then thaw, the same tissue site.
    • 6. 发明授权
    • Wide area ablation of myocardial tissue
    • 广泛消融心肌组织
    • US08475440B2
    • 2013-07-02
    • US11953189
    • 2007-12-10
    • Marwan AbboudFredric L. MilderGeorge Klein
    • Marwan AbboudFredric L. MilderGeorge Klein
    • A61B18/02
    • A61B18/02A61B2017/22051A61B2018/0022A61B2018/0212A61B2018/0262
    • The present invention advantageously provides a method and system for cryogenically ablating large areas of tissue within the left atrium. In an exemplary embodiment a cryotherapy device includes a catheter body having a substantially fixed diameter, a proximal end and a distal end; a first lumen for permitting passage of a cooling fluid from the proximal end to the distal end; a second lumen permitting return of the cooling fluid from the distal end to the proximal end; and an ablation element expandable from a first diameter that is substantially the same as the diameter of the catheter body to a second diameter that is at least twice the diameter of the catheter body, the ablation element having a surface portion that conforms to the uneven surface topography of the cardiac tissue. The ablation element can include one or more balloon and/or a flexible element that is deformed by moving the distal end of the catheter toward the proximal end of the catheter. The surface of the balloon can further be shaped by regulation of pressure within the one or more balloons. In an exemplary method a tissue ablation device is provided and tissue in the antrum of the left atrium is ablated with the device. In an exemplary method, only tissue in the antrum is ablated, and the ablation is created by freezing tissue.
    • 本发明有利地提供了用于低温切除左心房内的大面积组织的方法和系统。 在示例性实施例中,冷冻治疗装置包括具有基本上固定的直径,近端和远端的导管主体; 用于允许冷却流体从近端通向远端的第一腔; 允许冷却流体从远端返回到近端的第二管腔; 以及可从第一直径扩张的消融元件,所述第一直径基本上与所述导管主体的直径相同至所述导管主体直径的至少两倍的第二直径,所述消融元件具有与所述不平坦表面一致的表面部分 心脏组织的形貌。 消融元件可以包括通过将导管的远端朝向导管的近端移动而变形的一个或多个气囊和/或柔性元件。 球囊的表面可以通过调节一个或多个气囊内的压力而进一步成形。 在一种示例性方法中,提供组织消融装置,并且使用装置消融左心房窦内的组织。 在示例性方法中,只有窦中的组织被消融,并且通过冷冻组织产生消融。
    • 9. 发明授权
    • External atrial defibrillator and method for personal termination of atrial fibrillation
    • 外用心房除颤器和个人终止房颤的方法
    • US07085601B1
    • 2006-08-01
    • US09441936
    • 1999-11-17
    • Gust H. BardyGeorge Klein
    • Gust H. BardyGeorge Klein
    • A61N1/39
    • A61N1/39A61N1/395A61N1/3956A61N1/3987
    • An atrial defibrillator includes a portable, non-implantable housing, a pair of defibrillator pads, a shock generator, and an analyzer. The pads are applied to the outside of a patient's body, and the shock generator delivers a shock to the patient via the pads. The analyzer receives a cardiac signal from the patient, determines from the signal whether the patient is experiencing atrial fibrillation, and enables the shock generator if the patient is experiencing atrial fibrillation. Unlike conventional external atrial defibrillators, such an atrial defibrillator can be used by a layperson in the comfort of a patient's own home. Furthermore, such a defibrillator does not cause the surgery-related problems associated with implantable atrial defibrillators. Moreover, because the patient can choose when to receive a shock, such a defibrillator is less likely to surprise and embarrass the patient than automatic implantable defibrillators are.
    • 心房除颤器包括便携式非植入式外壳,一对除颤器垫,冲击发生器和分析器。 垫被施加到患者身体的外部,并且冲击发生器通过垫片向患者传递冲击。 分析仪从患者接收心脏信号,根据信号确定患者是否正在经历心房颤动,并且如果患者正在经历心房纤维性颤动,则能够进行休克发生器。 与传统的外部心房除颤器不同,这种心房除颤器可以由外行人在患者自己的家中舒适地使用。 此外,这种除颤器不会引起与可植入心房除颤器相关的手术相关问题。 此外,由于患者可以选择何时接受休克,因此与自动植入性除颤器相比,这种除颤器不太可能令人惊奇,并且使患者感到尴尬。