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    • 10. 发明申请
    • SYSTEMS AND METHODS FOR TITRATING RF ABLATION
    • 射频消融的系统和方法
    • US20110022041A1
    • 2011-01-27
    • US12835367
    • 2010-07-13
    • Frank InglePaul Roche
    • Frank InglePaul Roche
    • A61B18/18
    • A61B18/1492A61B2017/00084A61B2018/00011A61B2018/00666A61B2018/00702A61B2018/00761A61B2018/00779A61B2018/00791A61B2018/00839
    • An embodiment of a system for ablating tissue comprises an electrode configured for use to deliver RF power to ablate the tissue, and a heat flow sensor configured to provide a measurement of heat flow from the electrode to blood or irrigation fluid. According to some embodiments, the system further comprises an RF source configured to generate RF power connected to the electrode (PE) to ablate tissue, and a controller configured to control a level of RF power and a duration for an ablation procedure. The controller is programmed to implement a process to estimate RF power dissipated in tissue (PT), including calculating power loss due to convective heat flow (PCONV) from the tissue through the electrode to the blood or the irrigation fluid to cool the electrode, and calculating the RF power dissipated in tissue (PT) by subtracting PCONV from PE.
    • 用于消融组织的系统的实施例包括被配置为用于递送RF功率以消融组织的电极以及被配置为提供从电极到血液或冲洗流体的热流的测量的热流传感器。 根据一些实施例,所述系统还包括被配置为产生连接到所述电极(PE)以消融组织的RF功率的RF源,以及被配置为控制RF功率的水平和用于消融过程的持续时间的控制器。 控制器被编程以实现估计组织(PT)中消耗的RF功率的过程,包括计算由于通过电极的组织到血液或冲洗流体的对流热流(PCONV)的冷却电极的功率损耗,以及 通过从PE中减去PCONV来计算消耗在组织(PT)中的RF功率。