公开(公告)号：WO1996039089A1

公开(公告)日：1996-12-12

申请号：PCT/IB1996000552

申请日：1996-06-03

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  PATERSON, William, G.

IPC: A61B17/39

CPC classification number: A61B18/1206

Abstract: A power control apparatus for an electrosurgical generator (10) is used for controlling output power from the generator (10) to the tissue or bodily fluids of a patient (11). The control apparatus rapidly determines the range of impedance of the load on the electrosurgical generator (10) and adjusts the output power accordingly. Output current and output voltage from the electrosurgical generator (10) are monitored and sent to a microprocessor (18). The microprocessor (18) runs an algorithm that rapidly determines the impedance range of the load on the generator (10). The algorithm uses computational techniques, such as comparisons and bit shifting, that avoid long division and other time-consuming operations. The microprocessor (18) can then adjust a high voltage power supply (15) that effects the radio frequency amplifier stage. A method for controlling the power of the electrosurgical generator (10), including steps in the algorithm, is also disclosed.

Abstract translation: 用于电外科发生器（10）的功率控制装置用于控制从发生器（10）到患者（11）的组织或体液的输出功率。 控制装置快速地确定电外科发生器（10）上负载的阻抗范围，并相应地调节输出功率。 来自电外科发生器（10）的输出电流和输出电压被监测并发送到微处理器（18）。 微处理器（18）运行快速确定发电机（10）上的负载的阻抗范围的算法。 该算法使用诸如比较和比特移位的计算技术，避免长时间划分和其他耗时的操作。 微处理器（18）然后可以调节影响射频放大器级的高压电源（15）。 还公开了一种用于控制电外科发生器（10）的功率的方法，包括该算法中的步骤。

公开(公告)号：WO1997010764A1

公开(公告)日：1997-03-27

申请号：PCT/IB1996000791

申请日：1996-08-12

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  BUYSSE, Steven, P. ,  KENNEDY, Jenifer, S. ,  LANDS, Michael, J. ,  LOEFFLER, Donald, R. ,  LUKIANOW, S., Wade ,  RYAN, Thomas, P.

IPC: A61B17/39

CPC classification number: A61B17/29 ,  A61B18/1445 ,  A61B90/03 ,  A61B2017/2932 ,  A61B2018/00666 ,  A61B2018/00702 ,  A61B2018/00875

Abstract: A clamping force mechanism (10) and its method of use with electrosurgery allow a user to seal and/or joint patient's particular vascular tissue; the mechanism is elongate with user and patient ends (14). An actuator (15) is at the user end (13) and the effectors are at the patient end (14). Each effector has a face of an area to contact the particular vascular tissue. A lost motion connection (18) transfers user actuation to the effectors to hold a predetermined clamping force during electrosurgical tissue sealing. A yielding member (19) in the loss motion connection clamps the particular tissue between the faces with a predetermined force. The yielding member (19) is a spring (20), slip clutch (36) or hydraulic coupling possibly near the actuator (15). An active electrode is carried on one end effector and a return electrode (24) contacts the tissue so an electrosurgical energy supply (25) connected thereacross delivers energy therebetween. A feedback circuit (27) responds to parameters of energy delivered to tissue. A temperature sensor (28) on one face and an impedance monitor (29) respond to energy delivered. A control (30) applies energy to held tissue to seal and/or join it. The method transfers user actuation of the effectors with the lost motion connection (18), maintains clamping force while sealing and applying electrosurgical energy to seal and/or join held tissue. Energy is applied to a temperature or an impedance. The method shifts the yielding member (19) so the opposing faces (17) clamp the particular tissue therebetween with the force from the spring (20), via a transfer rod or by the hydraulic coupling or the slip clutch (36) for a range of pressure.

Abstract translation: 夹紧力机构（10）及其与电外科使用的方法允许使用者密封和/或联合患者的特定血管组织; 用户和患者端部（14）延伸的机构。 致动器（15）在用户端（13）处，并且执行器处于患者端（14）。 每个效应器具有接触特定血管组织的区域的面。 空动连接（18）将用户致动传递到效应器，以在电外科组织密封期间保持预定的夹紧力。 损失运动连接中的屈服构件（19）以预定的力夹紧面之间的特定组织。 屈服构件（19）是可能靠近致动器（15）的弹簧（20），滑动离合器（36）或液压联接器。 活性电极被承载在一个端部执行器上，并且返回电极（24）接触组织，使得连接在组织上的电外科能量供应（25）在其间递送能量。 反馈电路（27）响应输送到组织的能量的参数。 一个面上的温度传感器（28）和阻抗监视器（29）对输送的能量做出响应。 控制器（30）将能量施加到保持的组织以密封和/或连接它。 该方法利用迷失运动连接（18）来传递效应器的用户致动，同时密封并施加电外科能量以密封和/或连接保持的组织，保持夹紧力。 能量被施加到温度或阻抗。 该方法使屈服构件（19）移动，使得相对面（17）借助于来自弹簧（20）的力，经由传递杆或通过液压联接器或滑动离合器（36）将范围内的特定组织夹紧在一定范围内 的压力。

公开(公告)号：WO1997006582A1

公开(公告)日：1997-02-20

申请号：PCT/IB1996000630

申请日：1996-07-01

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  MCANULTY, Michael, James

IPC: H01R09/07

CPC classification number: H01R12/616 ,  H01R4/70 ,  H01R2201/12

Abstract: A method and assembly for electrically and mechanically connecting one or more flexible conductive members (11), with one or more insulated wires (12) using one or more insulation piercing terminals (13). The flexible conductive member (11) may have one or more electrically conductive layers (14) attached to a pliable backing (15). The insulated wire (12) may have one or more conductors (16). The insulation piercing terminal (13) provides a low impedance electrical connection between the flexible conductive member (11) and the insulated wire (12), while also providing a mechanical connection between the flexible conductive member (11) and the insulated wire (12) which minimizes movement of the insulated wire (12) due to any axial and/or longitudinal forces that may be applied to the insulated wire (12) or the flexible member (11) during manufacturing and use. The insulation piercing terminal (13) combines one or more piercing members (17) with an integral mechanical securing means and an electrical contact for engaging the flexible conductive member (11). The insulation piercing terminals (13), used in this method and assembly, eliminate the need to prepare either the flexible conductive member (11) or the insulated wire (12) prior to assembly. The method and assembly are of particular advantage to medical equipment manufacturers involved in designing and manufacturing flexible electrode type circuits, such as the return electrodes for use with electrosurgical generators or other electrodes or sensors associated with patient monitoring procedures and devices.

Abstract translation: 一种用于使用一个或多个绝缘穿刺端子（13）将一个或多个柔性导电构件（11）与一个或多个绝缘导线（12）电连接和机械连接的方法和组件。 柔性导电构件（11）可以具有连接到柔性背衬（15）上的一个或多个导电层（14）。 绝缘线（12）可以具有一个或多个导体（16）。 绝缘穿刺端子（13）在柔性导电构件（11）和绝缘线（12）之间提供低阻抗电连接，同时还在柔性导电构件（11）和绝缘线（12）之间提供机械连接， 这使得在制造和使用期间由于可施加到绝缘电线（12）或柔性构件（11）的任何轴向和/或纵向力而使绝缘电线（12）的移动最小化。 绝缘穿刺端子（13）将一个或多个穿孔构件（17）与整体机械固定装置和用于接合柔性导电构件（11）的电触点组合。 在该方法和组装中使用的绝缘穿刺端子（13）消除了在组装之前准备柔性导电构件（11）或绝缘电线（12）的需要。 所述方法和装配对于参与设计和制造柔性电极型电路的医疗设备制造商来说是特别有利的，例如用于电外科发生器或与患者监测程序和装置相关联的其他电极或传感器的返回电极。

公开(公告)号：WO1995024865A1

公开(公告)日：1995-09-21

申请号：PCT/IB1995000043

申请日：1995-01-19

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  STODDARD, Robert, B.

IPC: A61B17/22

CPC classification number: A61B17/320068 ,  A61B2017/320084 ,  A61B2018/00035 ,  Y10S604/902

Abstract: An ultrasonic surgical handpiece (10) for surgery on a patient has a handpiece with distal and proximal ends (12) on a housing (13) thereof for manipulation by a surgeon. A vibrator (19) is carried within a hollow (15) inside of the housing (13). A tool (16) extends from the vibrator (19) at the distal end (21) to the distal tip (22) and is tubular with a bore (17) along its axis so axial vibrations at high frequency are transmitted to the distal tip (22). Fluid (27) flows from the distal tip (22) to the vibrator (19), cools the vibrator (19) and connects to a source of suction (24) at the proximal end (12). A flue (25) carried cantilever on the distal end (21) extends about the tool (16) so a space is between the tool (16) and the flue (25) for guiding fluid (27) from the distal end (21) to the distal tip (22). A port located through the tool (16) connects between the space and the bore (17) and is axially positioned near the distal end (21) to collect fluid (27). An inlet (26) on the flue (25) is near the distal end (21) for fluid (27) provided by a supply. The inlet (26) is axial distal of the port and/or may meter fluid (27) to a preset range. The port may be at, near or toward a low stress region of the tool (16). The vibrator (19) is piezo. The port can be diametrically opposed to the inlet (26). Holes (29) may be located through the tool (16) near the distal tip (22) to prevent misting, clogging or dripping of fluid (27). A method of cooling the ultrasonic surgical handpiece (10) has steps that circulate fluid (27) from the inlet (26) to the space and port and pass cooling fluid (27) about the vibrator (19) and to the source of suction (24). A method of making the ultrasonic tool (16) may include having one or more ports (30) through the tool (16) to the bore (17) wherein the ports (30) are at, near or toward low stress regions and allow fluid (27) flow from the space to the bore (17).

Abstract translation: 用于患者手术的超声外科手术器具（10）具有其外壳（13）上的远端和近端（12）的手持件，用于由外科医生操纵。 振动器（19）被承载在壳体（13）内部的中空（15）内。 工具（16）从远端（21）处的振动器（19）延伸到远侧末端（22），并且沿其轴线具有孔（17）的管状，因此高频率的轴向振动被传递到远端 （22）。 流体（27）从远端（22）流到振动器（19），冷却振动器（19）并连接到近端（12）处的吸入源（24）。 在远端（21）上承载悬臂的烟道（25）围绕工具（16）延伸，从而在工具（16）和烟道（25）之间有一个空间，用于从远端（21）引导流体（27） 到远侧末端（22）。 位于工具（16）的端口在空间和孔（17）之间连接并且轴向定位在远端（21）附近以收集流体（27）。 烟道（25）上的入口（26）靠近由供应源提供的流体（27）的远端（21）。 入口（26）在端口的轴向远端和/或可将流体（27）计量到预设范围。 端口可以​​在工具（16）的附近或朝向低应力区域。 振动器（19）是压电的。 端口可以​​与入口（26）直径相对。 孔（29）可以位于靠近远侧末端（22）的工具（16）处，以防止流体（27）的雾化，堵塞或滴落。 一种冷却超声外科手持器具（10）的方法具有使流体（27）从入口（26）循环到空间和端口并使冷却流体（27）绕振动器（19）和吸入源 24）。 制造超声波工具（16）的方法可以包括具有通过工具（16）到孔（17）的一个或多个端口（30），其中端口（30）在低应力区域处，接近或朝向低应力区域，并且允许流体 （27）从所述空间流动到所述孔（17）。

公开(公告)号：WO1996039085A1

公开(公告)日：1996-12-12

申请号：PCT/IB1996000547

申请日：1996-06-03

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  EGGLESTON, Jeffrey, L. ,  ORSZULAK, James, H. ,  SODNICAR, Matthew, J.

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B18/1442 ,  A61B2018/00875

Abstract: A control system (10) and method for the operation of neurosurgical bipolar electrodes (11) provides a source of high frequency energy (13') connected to bipolar electrodes (11). Contacting surfaces are on the bipolar electrodes (11) of highly electrically conductive material. A current transducer attached to the source of high frequency energy (13') measures (20) the RMS current applied between the contact surfaces (25). A current transducer attached to the source of high frequency energy (13') provides a signal (26) correlated to the instantaneous values of the RMS voltage between the contacts. A control connects to the source of high frequency energy (13') for initially regulating the RMS current applied by the contacting surfaces in response to the impedance until the signal (19) divided by the measure (20) which is representative of the instantaneous impedance of the load reaches a predetermined value. The control regulates the RMS power applied by the contacting surfaces in accord with the impedance until the signal (19) divided by the measure (20) reaches a predefined value. The control responds to the measure (20) and the signal (19) so that the RMS voltage applied to the load being treated between the contacting surfaces regulated while its impedance is monitored until a prescribed value is reached. The control regulates the RMS voltage applied in accord with the impedance by changing the RMS voltage to a percentage of that applied until the prescribed value is obtained so that the tissues stay moist and are coagulated without drying and carbonizing or turning to eschar.

Abstract translation: 用于神经外科双极电极（11）的操作的控制系统（10）和方法提供连接到双极电极（11）的高频能量源（13'）。 接触表面位于高导电材料的双极电极（11）上。 附接到高频能量源（13'）的电流传感器测量施加在接触表面（25）之间的RMS电流（20）。 附接到高频能量源（13'）的电流传感器提供与触点之间的RMS电压的瞬时值相关的信号（26）。 控制器连接到高频能量源（13'），用于响应于阻抗来初始调节由接触表面施加的RMS电流，直到信号（19）除以表示瞬时阻抗的测量（20） 的负载达到预定值。 控制根据阻抗调节接触表面施加的RMS功率，直到信号（19）除以测量值（20）达到预定值。 控制器响应于测量（20）和信号（19），使得施加到正在被处理的负载的RMS电压在其阻抗被监测之前被调节，直到达到规定的值。 控制通过将RMS电压改变到所施加的百分比直到获得规定值来调节施加的RMS电压，使得组织保持潮湿并且凝固而不干燥和碳化或转向焦痂。

公开(公告)号：WO1995026562A1

公开(公告)日：1995-10-05

申请号：PCT/IB1995000132

申请日：1995-03-03

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  HORNER, Glenn, A. ,  LADTKOW, James, R. ,  PETERSEN, Richard, W.

IPC: H01H11/00

CPC classification number: H01H11/0056 ,  A61B2018/00928 ,  H01H1/585 ,  H01H9/06 ,  H01H2300/014

Abstract: An insulating switch base (16) with a top (17), bottom (18) and an edge (19) has configured openings (20) through the top (17) and one edge (19) for a conductor. A conductive switch (10) lead frame (22) has proximal ends (24) with insulation displacement connectors (25) bent in the openings. A resilient member (26) on the frame has a moveable contact and is conductively associated with a connector. A contoured arm (27) on the frame is distal of but conductive with another connector. The arm is spaced from the member as an open contact capable of momentary engagement. A frangible area (28) on each frame is between the member and the arm. Recesses (30) in the top (17) support (41) and retain the frame. A slot (35) and barbs (36) on each connector receive one conductor and secure in an opening after aligned installation in an opening, seating of the frame in its recess and severing the area over a passage in the base. A membrane attaches over the frame and a molding is applied about the membrane leaving the member open. A method of assembling the switch (10) having a cable (13) with conductors with a base. Driving conductors into the openings to bend into sections (21) and pressing the cable (13) into a channel on the base are steps. Forming and installing a frame with contacts (12) and connectors in recesses (30) to hold the frame with contacts (12) normally open but capable of closing are steps. Displacing the insulation on the conductors with connectors while separating the contacts (12) by severing areas of the frame and attaching a membrane over the frame and base are steps. Trimming excess conductors to prevent protruding from the base and encasing the assembled switch (10) in an insulator are steps. A tool for the assembly of base and frame has a support (41) to position and retain the bottom (18) aligned with the frame. An inserter (42) and a holder (43) force and bend each conductor in its section (21). A carrier locates the frame relative to and in alignment with recesses (30) in the top (17). Lugs (45) engage connector apertures (34) to drive each into an opening and chisels (46) cut areas over passages (37) on the base. Preset protuberances engage and set the arm when seating the frame so the dimple (31) engages and sets the switch (10) gap.

Abstract translation: 具有顶部（17），底部（18）和边缘（19）的绝缘开关基座（16）具有穿过顶部（17）的开口（20）和用于导体的一个边缘（19）。 导电开关（10）引线框架（22）具有近端（24），绝缘位移连接器（25）在开口中弯曲。 框架上的弹性构件（26）具有可移动的接触并且与连接器导电地相关联。 框架上的轮廓臂（27）远离但与另一个连接器导通。 臂与构件间隔开，作为能够瞬时接合的开放接触。 每个框架上的易碎区域（28）位于构件和臂之间。 顶部（17）支撑件（41）中的凹槽（30）并保持框架。 每个连接器上的槽（35）和倒钩（36）接收一个导体，并且在对准安装在开口中之后固定在开口中，将框架放置在其凹部中并切断基座中的通道上的区域。 膜连接在框架上，并且围绕膜施加模制件，使构件打开。 一种组装具有电缆（13）的开关（10）的方法，导体具有基座。 驱动导体进入开口以弯曲成部分（21）并将电缆（13）按压到基座上的通道中是步骤。 形成和安装具有触点（12）和凹槽（30）中的连接器的框架，以使具有通常打开但能够关闭的触点（12）的框架是步骤。 通过切断框架的区域并在框架和底座上安装隔膜来分离触点（12），使带有连接器的导体上的绝缘体位移。 修剪多余的导体以防止从基座突出并将组装的开关（10）封装在绝缘体中是步骤。 用于组装底座和框架的工具具有用于定位和保持与框架对准的底部（18）的支撑件（41）。 插入器（42）和保持器（43）在其部分（21）中强制并弯曲每个导体。 载体相对于顶部（17）中的凹部（30）定位框架并与之对齐。 接头（45）接合连接器孔（34）以驱动每个进入开口，并且凿子（46）切割在基座上的通道（37）上的区域。 安置框架时，预设突起接合并设置臂，使得凹坑（31）接合并设置开关（10）间隙。

公开(公告)号：WO1996039088A1

公开(公告)日：1996-12-12

申请号：PCT/IB1996000551

申请日：1996-06-03

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  KLICEK, Michael, S. ,  SODNICAR, Matthew, J.

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B2018/00642 ,  A61B2018/00666 ,  A61B2018/00684 ,  A61B2018/00726 ,  A61B2018/00761

Abstract: An electrosurgical generator (10) has an improved design for generating output waveforms using a microprocessor (15). The waveforms are generated in the form of a serial digital output from the microprocessor (15). The serial digital output is transformed into an electrosurgical RF output in an amplifier stage. The improved design also includes a monitoring circuit to continuously monitor the serial digital output by time-averaging the output, and then comparing that value with a threshold. The electrosurgical generator (10) comprises a microprocessor (15), an algorithm in the microprocessor (15) capable of toggling an output port of the microprocessor (15), an output amplifier (16), an adjustable high voltage DC power supply (17), a patient circuit including an active electrode (12) and a return electrode (13). The electrosurgical generator (10) may further comprise a mode selector (20) for selecting one of a plurality of pulse patterns in the serial digital output, and a plurality of command sequences in the algorithm, where each command sequence is designed to produce one of the plurality of patterns. There may also be a tank damp circuit (22) for reducing the amplitude of voltage spikes in the electrosurgical output, and a pulse suppression circuit. The monitoring circuit comprises a low pass filter (19) and a comparator to verify operation of the waveform generator.

Abstract translation: 电外科发生器（10）具有改进的设计，用于使用微处理器（15）产生输出波形。 波形以微处理器（15）的串行数字输出的形式产生。 串行数字输出在放大器级转换为电外科RF输出。 改进的设计还包括监控电路，通过对输出进行时间平均来连续监视串行数字输出，然后将该值与阈值进行比较。 电外科发生器（10）包括微处理器（15），微处理器（15）中能够切换微处理器（15）的输出端口的算法，输出放大器（16），可调高压直流电源（17） ），包括有源电极（12）和返回电极（13）的患者回路。 电外科发生器（10）还可以包括用于选择串行数字输出中的多个脉冲模式中的一个的模式选择器（20）和算法中的多个命令序列，其中每个命令序列被设计为产生 多种图案。 还可以存在用于减小电外科输出中的电压尖峰幅度的脉冲抑制电路（22）和脉冲抑制电路（22）。 监视电路包括一个低通滤波器（19）和一个比较器，用于验证波形发生器的工作。

公开(公告)号：WO1996039087A1

公开(公告)日：1996-12-12

申请号：PCT/IB1996000550

申请日：1996-06-03

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  BEK, Robin, B.

IPC: A61B17/39

CPC classification number: A61B18/1206 ,  A61B2018/00732 ,  A61B2018/00875

Abstract: An electrosurgical generator (10) is disclosed that includes an exit spark control system. Exit sparking occurs when energy arcs to the patient (13) as the active electrode (12) is withdrawn from the patient (13). A basis for controlling the exit spark is to automatically change the frequency at which the final amplifier is driven whenever the conditions for an exit spark are detected. The change in frequency acts to lower the gain and efficiency in the final amplifier and dissipate energy as heat. The exit spark control system includes a frequency adjustable waveform generator (14) and a logic capability for determining the conditions when exit sparking is likely to occur. Sensors and an algorithm in a microcontroller (16) are preferably required to detect the conditions preceding exit sparking occurrence. It is further preferred that, the algorithm also controls the sequencing of events: first stopping the electrosurgical output to prevent an arc from initiating and then changing the driving frequency appropriately to dissipate excess stored energy. The output waveform may be stopped for only a short time or the surgeon will detect drag while cutting through tissue.

Abstract translation: 公开了一种电外科发生器（10），其包括出口火花控制系统。 当有效电极（12）从患者（13）中取出时，能量电弧到患者（13）时，出现火花。 控制出口火花的基础是当检测到出口火花的条件时，自动改变最终放大器的驱动频率。 频率变化的作用是降低最终放大器的增益和效率，并将能量作为热量消散。 出口火花控制系统包括频率可调波形发生器（14）和用于在出现火花发生时确定条件的逻辑能力。 优选地，需要微控制器（16）中的传感器和算法来检测出口火花发生之前的条件。 还优选地，该算法还控制事件的顺序：首先停止电外科输出以防止电弧起始，然后适当地改变驱动频率以消散多余的存储能量。 输出波形只能在短时间内停止，或外科医生在切断组织时检测阻力。

公开(公告)号：WO1996027337A1

公开(公告)日：1996-09-12

申请号：PCT/IB1996000158

申请日：1996-03-01

Applicant: VALLEYLAB INC.

Inventor： VALLEYLAB INC. ,  PLATT, Robert, C., Jr. ,  BEK, Robin, Badih

IPC: A61B17/36

CPC classification number: A61B18/042 ,  A61B2018/1213

Abstract: An apparatus and method for igniting plasma in a surgical system is disclosed. A corona discharge is generated on a surgical handpiece which is used to ignite a plasma arc (19) for surgical operations. The advantages include greater reliability and repeatability of plasma arc (19) ignition. The apparatus comprises a handpiece incorporating an active electrode, a passage for ionizable gas (12), and a corona return electrode (17). The corona return electrode (17) has a terminus on the holder (11) and near the distal end (20) of the holder (11). The corona return electrode (17) is electrically connected to the return path of the electrosurgical generator. A non-uniform electric field is generated between the active electrode (14) and the corona return electrode (17) of sufficient strength so that a corona is formed near the active electrode (14). A separate return electrode (17) may be on the patient (25), or the apparatus may be configured for bipolar electrosurgical operation by carrying the return electrode (17) on the handpiece. A dielectric material separates the active electrode (14) and the corona return electrode (17). There is substantially capacitive coupling between the active electrode (14) and the corona return electrode (17). There is substantially resistive coupling between the active electrode (14) and the return electrode (17).

Abstract translation: 公开了一种在外科手术系统中点燃血浆的装置和方法。 在用于点燃用于外科手术的等离子体电弧（19）的外科手持机上产生电晕放电。 优点包括提高等离子弧（19）点火的可靠性和重复性。 该装置包括结合有活性电极的手柄，可电离气体通道（12）和电晕返回电极（17）。 电晕返回电极（17）在保持器（11）上并且在保持器（11）的远端（20）附近具有末端。 电晕返回电极（17）电连接到电外科发生器的返回路径。 在有源电极（14）和电晕返回电极（17）之间产生足够强度的不均匀电场，使得在有源电极（14）附近形成电晕。 单独的返回电极（17）可以在患者（25）上，或者该装置可以被配置为通过在手持件上承载返回电极（17）来进行双极电外科操作。 电介质材料分离有源电极（14）和电晕返回电极（17）。 在有源电极（14）和电晕返回电极（17）之间存在大体上的电容耦合。 在有源电极（14）和返回电极（17）之间存在大体上的电阻耦合。

公开(公告)号：WO1995025471A3

公开(公告)日：1995-09-28

申请号：PCT/IB1995000051

申请日：1995-01-23

Applicant: VALLEYLAB INC. ,  KLICEK, Michael, S.

Inventor： VALLEYLAB INC.

IPC: A61B17/39