CN104510525B - 具有功率调制的电外科医疗装置 - Google Patents
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Abstract
本发明涉及一种具有功率调制的电外科医疗装置。电外科消融装置向导管中的加热段提供脉冲宽度调制的DC功率,用于在提供治疗中使用。在一些实施例中,将要调制的DC功率来源于耦接至AC电源的AC/DC功率转换器。在一些实施例中,将要调制的DC功率来源于电池。在一些实施例中,装置例如基于从AC/DC功率转换器的功率可用性,而可切换地从AC/DC功率转换器或电池选择调制DC功率。
Description
技术领域
本申请的实施例总的来说涉及医疗装置,尤其涉及具有功率调制的电外科装置。
背景技术
多种医疗操作使用治疗装置以向患者的身体部分施加能量。例如,目前用于在静脉内治疗静脉回流疾病以及中空解剖结构(HAS)中的其他疾病所采用的技术,包括电外科操作,其包括电外科加热、射频消融(RFA)和激光消融。这些技术通常涉及配置以在HAS内的治疗部位处加热组织的治疗设备或系统。例如,用于治疗静脉回流疾病的电外科加热可以使用射频电流施加能量,从而形成靶向组织消融,而封闭(seal off)受损静脉。电外科设备通常包括发生器,诸如RF发生器;以及在远端具有加热段的导管,在治疗期间将其插入一个或多个静脉中。加热段可以使用由RF发生器驱动的RF能量来加热和封闭静脉。电外科治疗还用于其他医学治疗中,诸如,举例来说,关节内窥镜手术、肾脏神经切除术以及心脏手术。
通常,电外科操作可以使用由交流(AC)电源供电的装置进行。不幸的是,AC电源可能不是在所有场所都总是可用的或可靠的。
概述
本发明的多个方面涉及电外科装置,例如,用于能够利用AC和/或DC功率的医学治疗,同时向治疗装置提供适当的功率以提供有效和安全的治疗。总的来说,在一个方面,本公开的一种实施方式特征在于一种直流(DC)供电的电外科装置,包括具有加热段的导管以及调制电路,所述调制电路配置用于调制提供至所述加热段的DC功率。电外科装置还包括至少一个DC电源,用于将DC功率提供至第一电路。
可以包括一个或多个下列特征。在一些这样的方面,调制是脉冲宽度调制(PWM)。在一些这样的方面,调制电路包括脉冲宽度调制(PWM)驱动器电路和开关。在一些这样的方面,所述至少一个DC电源包括两个DC电源。在一些这样的方面,所述两个DC电源中的第一个包括AC/DC功率转换器,而所述两个DC电源中的第二个包括电池。一些这样的方面还包括开关,以可切换地从AC/DC转换器或电池提供功率至PWM电路,以提供至加热段。在一些这样的方面,AC/DC转换器和电池并联耦接至PWM电路。一些这样的方面还包括耦接在AC/DC功率转换器和PWM电路之间的DC/DC功率转换器。在一些这样的方面,加热段包括电阻性线圈。在一些这样的方面,电阻性线圈容纳在塑料壳中。在一些方面,PWM的频率在1kHz至50kHz的范围中,包含端点。
总的来说,在另一方面,本发明的一种实施方式特征在于一种操作电外科装置的方法,包括:提供直流(DC)功率,使用脉冲宽度调制(PWM)来调制DC功率,以及将已调制的DC功率施加至导管中的加热元件。
可以包括一个或多个下列特征。在一些方面,使用PWM调制DC功率包括提供DC功率至开关,以及使用PWM驱动器信号打开和闭合开关。在一些这样的方面,PWM的频率在1kHz至50kHz的范围,包含端点。在一些这样的方面,提供DC功率包括可选择地从AC/DC功率转换器或从电池提供DC功率。在一些这样的方面,选择从AC/DC功率转换器或从电池提供DC功率,是基于到AC/DC功率转换器的AC功率的可用性。在一些这样的方面,可以在将功率施加于加热元件期间,对从AC/DC功率转换器或从电池提供DC功率进行选择。
总的来说,在又一方面,本公开的实施方式特征在于一种电外科装置,包括AC/DC功率转换器和电池。该装置还包括导管,所述导管包括电阻性线圈。包括有电路,用于基于来自AC/DC功率转换器的DC功率的可用性的停止,将到电阻性线圈的功率提供从源自AC/DC功率转换器的功率切换至源自电池的功率。
可以包括一个或多个下列特征。一些方面还包括脉冲宽度调制(PWM)电路,用于调制提供至电阻性线圈的功率。
在阅读本公开内容之后,将更全面地理解本发明的这些和其他方面。
附图说明
图1示出了根据本发明多个方面的医学治疗系统;
图1A和1B是使用图1的医学治疗系统的示例手术的侧视图;
图2是根据本发明的多个方面的电外科消融装置的框图;
图3是根据本发明的多个方面的电外科消融装置的供电模块的框图;
图4是示出根据本发明的多个方面的DC功率的脉冲宽度调制的一组图;
图5是根据本发明的多个方面的用于确定对占空比的调整的处理的流程图;以及
图6是根据本发明的多个方面的用于确定使用源自AC的功率还是使用源自电池的功率的处理的流程图。
具体实施方式
下文参考附图讨论多个实施例。本文所使用的方向术语,诸如近、远、上、下、顺时针、逆时针等,通常参照附图中所示的结构使用。例如,当从附图所示的视角观察时被描述为顺时针旋转的部件,当从相反的视角观察时,可能被描述为逆时针旋转。此外,通过改变或颠倒各个部件的位置或移动方向,这些实施例可能发生变化。因此,本文所示的方向术语不应理解为是限制性的。
参考图1,示例性的医学治疗系统10可以包括具有远端13和近端14的导管轴12。加热段15可操作地连接朝向或邻近导管轴的远端,而手柄16连接在导管轴的近端。电缆17将加热段15电连接至发生器系统18。电缆17可以集成至手柄,并且可移除地连接至发生器系统。替代地,电缆17可以可移除地连接至手柄。
加热段15包括加热元件20。在一些实施例中,加热元件20可以是电阻性线圈,其例如可由RF能量驱动。优选地,加热元件20的相对电阻或阻抗被设计成与加热元件20所耦接的发生器系统18的输出的相对电阻或阻抗相关或匹配。例如,加热元件20的电阻可以由导线规(wire gage)参考导管直径的、治疗期间所需的能量和/或电源规范确定。加热元件20可以包括各种导电材料,诸如,举例来说,镍铬合金()、镍铁合金(例如合金52)、铜、不锈钢、钛、锆、、、、、,及其组合或合金等。可以选择用于加热元件20的材料,以提供电阻式温度检测器(RTD)功能,其中温度是根据阻抗间接地测量的。合金52被认为是适于向电阻性线圈提供RTD功能的一种材料。在多个实施例中,电阻性线圈可以容纳在塑料壳内,例如,氟化乙丙烯(FEP)壳。
加热段15固定在细长的导管轴12的远端13处,在一些实施例中,导管轴12和加热段15一同被认为是导管。导管轴12可以用于操纵加热元件20在HAS内进入期望的布置。在一些实施例中,导管轴12包括低摩擦系数的生物相容性材料。例如,导管轴12可以包括聚醚醚酮(PEEK),聚乙烯,或聚四氟乙烯(PTFE),诸如。在其它实施例中,导管轴12可以包括聚酰亚胺,热塑性弹性体(TPE)(诸如)、聚醚嵌段酰胺(PEBA)(诸如)、尼龙或任意其他合适的材料。
在一些实施例中,导管轴12的尺寸适于匹配在血管结构内,所述血管结构的直径可以在约1mm和约25mm之间(优选在约2mm和约18mm之间)。导管轴12的近端14包括手柄16,手柄16可以包括连接件和端口,所述连接件用于通过电缆17与电源18相接,所述端口用于流体和引导线的通过。手柄16可以集成地连接至电缆17,或者手柄16可以可移除地连接至电缆17。
示例性的医学治疗系统10可以用于多种多样的医学操作中,包括治疗静脉回流的静脉内治疗。特别地,参考图1A,一种方法可以包括将加热段15插入到将要治疗的HAS 19的最远端部分。随后将加热段15与HAS内的第一治疗位置T1对齐。随后,对于期望的时间长度,向加热段15提供功率,以治疗第一治疗位置T1。在期望的滞留时间之后,诸如,在HAS已经如图1B所示萎陷(collapse)之后,可以减小或关闭提供至加热段15的功率。随着功率关闭(或实质性减小),加热段15可以向近端移动,直至加热段15的远端邻近第一治疗位置T1的近端,如图1B中所示。在HAS 19内的第二治疗位置T2处,对于期望的时间长度,再次向加热段15提供功率,以在第二治疗位置T2处治疗HAS。重复该过程,直至完成对HAS的治疗。在一些实施例中,T1和T2可以重叠。虽然T1和T2被示为在同一HAS中彼此邻近,但是T1和T2也可以处于不同的位置,诸如不同的HAS中。
在一些实施例中,发生器系统包括至少一个直流(DC)电源,和用于调制电力的调制电路,从而可以将RF能量施加至加热段15。在大部分实施例中,通过调制施加至加热段15的DC功率而产生RF能量,在一些实施例中,通过对施加至加热段15的DC功率进行脉冲宽度调制(PWM)而产生RF能量。调制电路可以是例如脉冲宽度调制电路,其在一些实施例中包括脉冲宽度调制驱动器电路和开关。在若干实施例中,DC电源通过开关耦接至加热段15,其中根据脉冲宽度调制信号而对于周期性循环的不同部分打开和关闭所述开关。在大部分实施例中,周期性循环具有在射频范围内的频率,并且在一些实施例中,周期性循环具有在1kHz和50kHz之间的频率范围(包含端点)。在大部分实施例中,当开关闭合时,将功率施加至加热段15,而当开关处于打开位置时,不施加功率,但是在一些实施中,情况可能相反。在一些实施例中,至少部分地通过使用用于传输功率的开关来提供所述开关,而在一些实施例中,开关可以包括功率MOSFET或绝缘栅双极晶体管(IGBT)。在多个实施例中,发生器系统18包括控制器。在多个实施例中,控制器可以是一个或多个处理器、FPGA、CPLD、DSP或其组合。控制器可以执行各种功能,包括至少基于来自(一个或多个)温度传感器(例如,热电偶、热敏电阻、电阻温度装置、光学或红外传感器、及其组合等)的读数来确定PWM的占空比,所述温度传感器位于加热段15中或与加热段15邻近。例如,控制器可以将加热段15加热至设定温度。在可替换的实施例中,用户选择发生器系统18的恒定功率输出。例如,用户可以与来自加热段15中的温度传感器的温度显示相关地手动地调节功率输出。
在一些实施例中,发生器系统18包括多个DC电源,例如可通过控制器命令功率切换电路的操作选择所述多个DC电源中的不同的DC电源,以用于向加热元件20提供功率。例如,在一些实施例中,发生器系统18可以包括(或由其供电)电池作为一个DC电源和耦接至AC主线(公用事业或发电站电源)的AC/DC功率转换器,其中所述控制器和功率切换电路基于例如来自AC派生电源的功率的可用性,选择使用其中一个电源或另一个。在该背景下,如图1中所示,AC/DC功率转换器21通过电耦23耦接至发生器系统18的壳体,并且通过电耦25耦接至AC电源,AC/DC功率转换器21可被认为是发生器系统18的一部分。替代地,功率转换器21可以集成至发生器系统18,诸如作为内部电子设备的一部分。在一些实施例中,通常,控制器和功率切换电路可以在正在向加热元件20提供功率的同时,切换电源,允许在医学治疗系统10的操作期间进行电源切换。
图2是根据本发明多个方面的电外科消融装置的框图。在图2中,AC/DC功率转换器211从诸如公用事业或发生站的电源接收AC功率。AC/DC功率转换器211将AC功率转换成DC功率。例如,AC功率转换器211可以接收范围在100-200VA的AC功率,而输出标称在24VDC的功率,可用电流例如在几安培至数安培的范围中。
向发生器单元213(诸如如上所述的发生器系统18)提供DC功率,或者使得DC功率对其可用。在图2中,发生器单元213通过将功率提供至手柄221和耦接至手柄221的导管223,而将功率提供至加热段(未示出),其中导管223包括加热段,例如如参考图1所讨论的,参照加热段15、手柄16和导管轴12。在大部分实施例中,所提供的功率是脉冲宽度调制的DC功率。在许多实施例中,以及如图2中所示,发生器单元213还从导管223接收信号,例如,指示加热段的温度的信号。在该实施例中,发生器单元213可以调节PWM的占空比,以将加热段的温度调节至期望的设置。在许多实施例中,PWM具有在RF范围中的周期循环,而在一些实施例中,PWM具有在1kHz至50kHz的范围中(包含端点)的周期循环。
发生器单元213包括供电模块215,并且图2所示的实施例中,还包括控制模块217和监视模块219。
供电模块215接收源自AC/DC功率转换器211的DC功率。供电模块215将功率提供至手柄221以及耦接至手柄221的导管223。导管223包括加热段(未示出),诸如参考图1所讨论的。因而供电模块215有效地将功率提供至加热段。在将功率提供至加热段时,供电模块215调制DC功率以提供已调制的RF功率至加热段,例如,使用供电模块215的调制电路来进行调制。在大部分实施例中,调制是脉冲宽度调制(PWM),而调制电路可以是脉冲宽度调制电路,例如包括脉冲宽度调制驱动器电路和开关。在多个实施例中,由控制模块217例如基于加热段的期望的温度以及来自导管223的指示加热段的温度的信号,确定PWM的占空比。在一些实施例中,调制的DC功率处于与由AC/DC功率转换器211提供的电压所不同的电压,并且在这些实施例中,可以采用一个或多个DC/DC功率转换器,以提供调制的DC功率。在一些实施例中,AC/DC转换器211提供24伏特的DC功率,而调制的DC功率约为15伏特,例如15伏特至16.8伏特或15.5伏特。
供电模块215还向控制模块217和监视模块219提供功率信号,并且在一些实施例中向其提供状态信号。在一些实施例中,提供至控制模块217和监视模块219的功率信号适于那些模块中的电路的供电,而在其他实施例中,适于由在供电电路中的其他模块中的功率控制电路(例如CMOS电路)使用。状态信号可以是与供电模块215可用的功率状态相关的各种信号。
在一些实施例中,供电模块215还包括电池225,并且在这样的一些实施例中还包括电池充电器。电池225可以是电池组的形式。在多个实施例中,电池225可以与供电模块215物理分离,而在一些实施例中,可以处于发生器单元213的壳体之外。在一些实施例中,电池225可以例如是锂离子电池组。锂离子电池可以是可再充电的,而在使用可再充电电池的实施例中,供电模块215可以包括电池充电电路。在一些实施例中,电池充电电路可以由AC/DC功率转换器211供电,或者如前所述由DC/DC功率转换器供电。
在功率模块215包括电池225的实施例中,功率模块215可以例如使用供电模块215的功率切换电路来选择源自AC/DC功率转换器211的DC功率或者源自电池225的DC功率中的一个或另一个,以供调制和提供至导管223的加热段。在一些实施例中,如果源自AC/DC功率转换器211的DC功率是可用的,那么供电模块215可以利用该DC功率,而如果源自AC/DC功率转换器211的DC功率不可用,则供电模块215可以利用源自电池225的DC功率。类似地,可以选择从AC/DC功率转换器211或电池225向控制模块217和监视模块219发送功率信号。在一些实施例中,将来自AC/DC功率转换器211的功率可用性的状态提供至控制模块217,而控制模块217提供命令信号至供电模块215,指令供电模块217采用何种电源。
如上所述,控制模块217可以接收来自导管223(通过手柄221)的指示加热段的温度的信号,以及指示源自AC/DC功率转换器211的功率可用性的信号。基于这些信号以及在多个实施例中还基于其他信号,控制模块217可以确定要提供至导管223的DC功率的脉冲宽度调制的占空比,并且对提供DC功率的电源的选择。这些确定的结果可以以到供电模块215的命令信号的形式提供至供电模块215。在一些实施例中,命令信号包括指示DC功率的PWM的占空比的信号。在一些实施例中,控制模块217包括可编程处理器,以进行这些确定。在多个实施例中,可以使用微控制器和相关电路来实现控制模块217。在一些实施例中,控制模块217还包括功率调节电路,用于调节由供电模块215提供的功率,以用于控制模块217的电路的操作。在多个实施例中,控制模块217还接收指示至发生器单元213的用户输入的信号,并提供用于发生器单元213的指示器(例如,LED指示器)的显示的命令。
监视模块219还从导管223(通过手柄221)接收指示关于加热段的温度的信号,以及从供电模块215接收功率和状态信号。监视模块219可以包括用于执行与发生器单元213和导管223的状态相关的各种监视功能的电路。
图3是根据本发明的多个方面的供电模块300的框图。在一些实施例中,图3的供电模块300是图2的供电模块215,而在一些实施例中,图3的供电模块300类似于图2的供电模块215。在多个实施例中,图3的供电模块300是图2的供电模块215的一部分,而在一些实施例中,图3的供电模块300包括在图2的系统的其他模块中可见的电路。
图3的供电模块300包括AC/DC功率转换器311。然而在多个实施例中,AC/DC功率转换器311位于供电模块300外部。AC/DC功率转换器311耦接至AC电源,例如公用事业主线(utility main)或发电站,并且AC/DC功率转换器311将AC功率转换成DC功率。
将由AC/DC功率转换器311提供的DC功率提供至DC/DC功率转换器313。在大部分实施例中,DC/DC功率转换器313将由AC/DC功率转换器311提供的DC功率转换成不同的功率水平。例如,AC/DC功率转换器311可以提供24伏特DC的DC功率,而DC/DC功率转换器313可以将该功率转换成DC 15.5伏特。在一些实施例中,在AC/DC功率转换器311和DC/DC功率转换器313之间可以包括附加的DC/DC功率转换器,例如用于在发生来自外部源的电压尖峰时,提供电隔离特征。将来自DC/DC功率转换器313的DC功率提供至脉冲宽度调制器323,用于将脉冲宽度调制的功率提供至导管的加热段。
脉冲宽度调制器323(在一些实施例中其包括开关)调制DC功率,以提供调制的DC功率,以供导管的加热段(例如图1的加热段15)使用。脉冲宽度调制器323根据来自PWM驱动器325的信号调制DC功率,而在一些实施例中,PWM驱动器包括PWM驱动器电路,PWM驱动器电路与开关一同构成PWM调制电路。在一些实施例中,PWM驱动器325位于功率模块的外部。PWM驱动器325向脉冲宽度调制器323提供信号,命令脉冲宽度调制器323在循环周期的各不同部分接通或关断输出功率。在一些实施例中,周期的频率在1kHz至50kHz(包含端点)的范围中。在许多实施例中,PWM驱动器325基于例如由控制模块(例如图2的控制模块217)提供的命令信号提供驱动脉冲宽度调制器323的操作的信号,指示脉冲宽度调制的期望的占空比。
出于说明目的,图4包括示出了不同占空比循环的示例性的接通和关断部分的图。在图中,沿着x轴示出了时间,而沿着y轴示出了输出电压。这些图示出了理想的输出电压,如例如在大部分实施例中,在离散的时间段期间发生输出电压的上升和下降。第一图411示出了25%的占空比,其中在时间段413期间具有高输出电压,在时间段415期间具有低输出电压,而在时间段415的结束417返回至高输出电压。时间段413和415形成完整的循环,其中时间段413占该循环的25%,而时间段415占该循环的75%。第二图421示出了50%的占空比,其中在时间段423期间具有高输出电压,在时间阶段425期间具有低输出电压,而在时间段425的结束427返回至高输出电压。时间段423和425形成完整的循环,其中时间段423和时间段425各占循环的50%。第三图431示出了75%的占空比,其中在时间段433期间具有高输出电压,在时间段435期间具有低输出电压,而在时间段435的结束437返回至高输出电压。时间阶段433和435形成完整的循环,其中时间段433占循环的75%,而时间段435占循环的25%。
返回图3,在一些实施例中,并且如图3所示,可以使用源自AC的功率或源自电池的功率来提供DC功率用于调制。相应地,在图3的实施例中,功率模块300包括电池317。在多个实施例中,电池317可以与功率模块300分离。电池317还可以向脉冲宽度调制器323提供DC功率,其中第一功率开关321可选择地对由DC/DC转换器313提供的源自AC的功率或者DC功率进行选择,以用于由脉冲宽度调制器323进行调制。在一些实施例中,第一功率开关321基于控制模块(例如参考图2所讨论的控制模块217)提供的控制信号选择源自AC的电力或电池电力。在一些实施例中,不使用第一功率开关321,其中电池317的输出和DC/DC功率转换器313的输出并联连接,使得DC/DC功率转换器313的输出和电池317的输出均呈高阻抗。
在具有电池317的实施例中,功率模块300还可以包括电池充电器模块315。在多个实施例中,如电池317那样,电池充电器模块315可以位于功率模块外部。电池充电器模块315包括电池充电电路,用于使用来自AC/DC转换器311的功率对电池317充电。
如图3中所示,AC/DC功率转换器311和电池317还耦接至第二功率开关319。第二功率开关319提供功率,以用于由多种电路元件使用,例如,图2的发生器单元213的控制模块217和监视模块219的电路。
图5是根据本发明的多个方面的用于确定对占空比的调整的处理的流程图。在一些实施例中,通过电路(其可以是处理器形式)执行该处理。在一些实施例中,由图2的控制模块217执行该处理,而在一些实施例中,由图2的控制模块217的可编程处理器执行该处理。
在模块511中,该处理将导管加热段的实际温度或者导管加热段附近的温度与期望的温度进行比较。导管加热段附近的温度可以由例如位于导管中、加热段附近的温度传感器提供。所述期望的温度在一些实施例中可以是恒定温度。在一些实施例中,期望的温度可以由用户输入至例如图2的发生器单元213,图2的控制模块217接收所输入的温度。
在模块513中,该处理确定实际温度是否大于期望的温度加第一偏移值。第一偏移值的使用有助于避免例如占空比的过于频繁地改变,同时将实际温度基本上维持在期望的温度带内,第一偏移值在多个实施例中是可编程的。如果实际温度大于期望的温度加第一偏移值,则该处理继续至模块515,否则处理继续至模块517。
在模块515中,该处理降低占空比。在一些实施例中,该处理使占空比降低预定值,直至最小值,在一些实施例中,该最小值大于0%。随后,该处理返回。
在模块517中,该处理确定实际温度是否小于期望的温度减第二偏移值。在一些实施例中,第二偏移值与第一偏移值相同。在一些实施例中,第二偏移值大于第一偏移值,而在一些实施例中,第二偏移值小于第一偏移值。如果实际温度小于期望的温度减偏移值,则该处理继续至模块519,否则该处理返回。
在模块519中,该处理增加占空比。在一些实施例中,该处理使占空比增加预定值,直至最大值,在一些实施例中,该最大值小于100%。随后,该处理返回。
图6是根据本发明的多个方面的用于确定使用源自AC的功率还是源自电池的功率的处理的流程图。在一些实施例中,该处理由电路执行,该电路可以是处理器的形式。在一些实施例中,该处理由图2的控制模块217执行,而在一些实施例中,该处理由图2的控制模块217的可编程处理器执行。在一些实施例中,在将功率施加至导管加热段之前,执行该处理。在一些实施例中,在将功率施加至加热段的同时执行该处理。在一些实施例中,在将功率施加至加热段之前,并且在将功率施加至加热段的同时执行该处理。
在模块611中,该处理确定源自AC的功率是否可用。该处理可以基于例如图2的发生器单元213的供电模块215提供的信号确定源自AC的功率是否可用。如果源自AC的功率可用,则该处理继续至模块613,否则该处理继续至模块615。
在模块613中,该处理使用源自AC的功率提供要调制的用于提供至导管的加热段的DC功率。在多个实施例中,该处理还采用源自AC的功率,源自AC的功率通常由例如AC/DC功率转换器转换成DC,以用于对电路供电,并且在一些实施例中用于对电池充电。随后该处理返回。
在模块615中,该处理使用源自电池的功率来提供要调制的用于提供至导管的加热段的DC功率。在多个实施例中,该处理还采用源自电池的功率以用于对电路供电,并且在一些实施例中该处理命令停止对电池充电。随后该处理返回。
虽然已经参考多个实施例讨论本发明,但是应当认识到,本发明包括本公开内容所支持的具备新颖性和非显而易见性的权利要求。
Claims (11)
1.一种直流DC供电的电外科消融装置,包括:
导管,其包括加热段;
调制电路,配置为调制提供至加热段的DC功率,其中所述调制是脉冲宽度调制PWM;以及
至少一个DC电源,用于将DC功率提供至所述调制电路。
2.根据权利要求1所述的装置,其中所述调制电路包括脉冲宽度调制PWM驱动器电路和开关。
3.根据权利要求1所述的装置,其中所述至少一个DC电源包括两个DC电源。
4.根据权利要求3所述的装置,其中所述两个DC电源中的第一个包括AC/DC功率转换器,而所述两个DC电源中的第二个包括电池。
5.根据权利要求4所述的装置,还包括开关,以可切换地从AC/DC转换器或电池向调制电路提供功率,以提供至加热段。
6.根据权利要求4所述的装置,其中所述AC/DC转换器和所述电池并联耦接至调制电路。
7.根据权利要求4所述的装置,还包括DC/DC功率转换器,其耦接在所述AC/DC功率转换器和所述调制电路之间。
8.根据权利要求1所述的装置,其中所述加热段包括电阻性线圈。
9.根据权利要求8所述的装置,其中电阻性线圈容纳在塑料壳中。
10.根据权利要求1所述的装置,其中所述PWM的频率在1kHz至50kHz的范围,包含端点。
11.一种电外科消融装置,包括:
AC/DC功率转换器;
电池;
导管,包括电阻性线圈;
脉冲宽度调制PWM电路,用于调制提供至所述电阻性线圈的DC功率;以及
功率切换电路,用于基于来自AC/DC功率转换器的DC功率的可用性的停止,而将对所述电阻性线圈的DC功率提供从源自AC/DC功率转换器的功率切换至源自电池的功率。
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-
2013
- 2013-09-27 US US14/038,827 patent/US10448986B2/en active Active
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2014
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CN104510525A (zh) | 2015-04-15 |
US10448986B2 (en) | 2019-10-22 |
IL234374A0 (en) | 2014-11-30 |
EP2853216A1 (en) | 2015-04-01 |
US20220354563A1 (en) | 2022-11-10 |
US20150094703A1 (en) | 2015-04-02 |
EP3572022B1 (en) | 2023-01-04 |
US20200046415A1 (en) | 2020-02-13 |
EP2853216B1 (en) | 2019-05-08 |
BR102014023774A2 (pt) | 2015-10-06 |
JP2015066448A (ja) | 2015-04-13 |
EP3572022A1 (en) | 2019-11-27 |
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