WO2016206499A1 - 左右并列回路双极电极 - Google Patents

左右并列回路双极电极 Download PDF

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WO2016206499A1
WO2016206499A1 PCT/CN2016/082156 CN2016082156W WO2016206499A1 WO 2016206499 A1 WO2016206499 A1 WO 2016206499A1 CN 2016082156 W CN2016082156 W CN 2016082156W WO 2016206499 A1 WO2016206499 A1 WO 2016206499A1
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tube
insulating
metal
electrode
sleeve
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PCT/CN2016/082156
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English (en)
French (fr)
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林敏�
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珠海市司迈科技有限公司
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Priority to JP2016600150U priority Critical patent/JP3216809U/ja
Priority to US15/308,613 priority patent/US20170181792A1/en
Priority to DE212016000007.1U priority patent/DE212016000007U1/de
Publication of WO2016206499A1 publication Critical patent/WO2016206499A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1485—Probes or electrodes therefor having a short rigid shaft for accessing the inner body through natural openings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/148—Probes or electrodes therefor having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00059—Material properties
    • A61B2018/00071—Electrical conductivity
    • A61B2018/00083—Electrical conductivity low, i.e. electrically insulating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00547—Prostate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00601—Cutting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1405—Electrodes having a specific shape
    • A61B2018/1407—Loop

Definitions

  • the present invention relates to the field of medical device technology, and in particular to an electrode for a resectoscope for minimally invasive surgery.
  • Prostatic hyperplasia and hyperplasia are common diseases in middle-aged and elderly men with high incidence.
  • Surgical resection is the most effective treatment.
  • the traditional open surgery is to cut an incision in the lower abdomen of the patient, and then cut the bladder to remove the prostate, which is very harmful to the normal urinary tract physiological structure.
  • prostatic hyperplasia patients are elderly people, who are often accompanied by other serious diseases and are difficult to tolerate the trauma caused by open surgery. Therefore, various minimally invasive methods of transurethral treatment of benign prostatic hyperplasia are greatly affected by urologists. Pay attention to it.
  • Transurethral resection of the prostate is invented in developed countries in Europe and America. Because this surgery does not require surgery on the human body, it greatly reduces the trauma and is recognized as the current "gold standard" for the treatment of benign prostatic hyperplasia.
  • a coaxial loop bipolar electrode disclosed in the invention patent CN 201492495 U is currently used more commonly.
  • the parallel circuit bipolar electrode front section metal tube bifurcation, the metal tube port assembly ceramic tube, the rear end is composed of two side-by-side steel tubes 31; the positive electrode 35 passes through the steel tube 31 connecting the wires 36, in which the electrodes are side by side
  • the steel pipes together form a loop electrode; the corresponding waterproof plug 34 opening is difficult to conform to the shape of the side-by-side steel pipe.
  • the side-by-side steel pipes are commonly used as circuit electrodes. Although the surface has an insulating tube, the operation time is long, the insulating sleeve may be worn, and the pressure resistance performance is lowered, and there is a risk of electric leakage. In addition, the side-by-side steel pipe takes up a larger space than a single pipe, and the flow of brine in the inner sheath of the electric mirror is blocked, and the convection of the brine is not ideal.
  • Patent EP 1072230 A1 shows another bipolar electrode, the front section of which is identical to the shape described in the above-mentioned CN 201492495 U, and the rear section is different.
  • a circular steel tube is used instead of the side-by-side steel tube, and the corresponding waterproof plug opening is also circular. This can effectively improve the water leakage phenomenon of the electric mirror; however, the circular steel tube still acts as a loop electrode, so the insulation sleeve of the outer surface of the steel tube is degraded due to wear, and the risk of leakage cannot be eliminated.
  • the insulating tube is added, the electrode resistance becomes large, and the electrode volume also increases.
  • the left and right parallel loop bipolar electrodes of the invention minimize the contact area and the position of the loop electrode and the human body, reduce the stimulating effect of the current on the human body, and retain the advantages of the single loop cutting operation, and solve the bipolar electrode which is used more in the market.
  • the existing seals are not good, the convection is not ideal, and the electrode resistance is large, which also solves the leakage problem caused by the wear of the insulation layer.
  • a left and right parallel loop bipolar electrode comprising:
  • a positive electrode a positive electrode, a second insulating tube, a metal sleeve as a negative electrode, a rigid tube, two insulating sleeves with a split end at one end and a split end, a straight metal tube with a flare, and an insulating layer Wire, twin conductor and terminal;
  • the metal sleeve and the hard tube are arranged side by side at a distance, and the metal sleeve and the hard tube head respectively fix an insulating tube, one end of the positive electrode and the hard
  • One of the wires with the insulating layer drawn from the tube is connected in a corresponding one of the insulating tubes, and the other wire with the insulating layer is welded to the metal sleeve;
  • the rear part of the metal sleeve and the hard tube are respectively sleeved Provided in the two insulating sleeves; in the rear portion of the bipolar electrode, the flaring portion of the metal straight tube covers the closed rear portion of the two insulating sleeves;
  • the metal a tail end of the straight pipe is connected to the terminal, the terminal is connected to the double-core wire, and the wires with the insulating layer are respectively connected to the double-core wire through the metal straight pipe;
  • the other end of the positive electrode is fixed in the other of the insulating tubes;
  • the high frequency energy forms a loop in the working medium through the two insulated conductor wires in the straight metal tube.
  • left and right parallel loop bipolar electrodes including:
  • a positive electrode a positive electrode, a second insulating tube, a metal sleeve as a negative electrode, an insulating tube, an insulating sleeve, a straight metal tube with a flare, two wires with an insulating layer, a double-core wire and a binding post;
  • the metal sleeve and the hard tube are arranged side by side at a distance, and the metal sleeve and the insulating hard tube head respectively fix an insulating tube, one end of the positive electrode and the One of the wires with the insulating layer drawn from the hard pipe is connected in a corresponding one of the insulating tubes, and the other wire with the insulating layer is welded to the metal sleeve; the rear portion of the metal sleeve is sleeved in the In the insulating sleeve, in the rear portion of the bipolar electrode, the rear portion of the insulating tube and the rear portion of the insulating sleeve are closed, and the periphery thereof is covered by the flare of the metal straight tube a tail end of the metal straight pipe is connected to the terminal, the terminal is connected to the double-core wire, and the wire with the insulating layer passes through the metal straight pipe and corresponds to the double-core wire respectively Connecting;
  • the high frequency energy forms a loop in the working medium through the two insulated conductor wires in the straight metal tube.
  • the left and right parallel loop bipolar electrodes further comprise an electrode fixing card welded to the outer surface of the metal straight tube for mating with the mirror rod of the endoscope.
  • the metal sleeve has an outer diameter of 1 mm to 1.7 mm
  • the metal straight tube has an outer diameter of 1.5 to 2.2 mm.
  • the exposed front portion of the metal sleeve that is not covered by the insulating sleeve is a return electrode having a surface area that is five times 16 times the surface area of the electrode of the curved positive electrode.
  • the shape of the positive electrode is semi-annular, drum-shaped or shovel-like.
  • the insulating tube is a ceramic insulating tube.
  • the high-frequency energy of the left and right parallel loop bipolar electrodes of the present invention forms a loop through two wires with insulating layers in the straight metal tube, and the straight metal tube itself is not used as a loop electrode, and is not charged, so that there is no need for sheath insulation at the periphery thereof.
  • FIG. 1 is a schematic view showing the overall structure of a prior art resective mirror bipolar electrode according to the background art of the present invention
  • FIG. 2 is a schematic view showing the overall structure of a parallel loop bipolar electrode according to an embodiment of the present invention
  • FIG. 3 is a top plan view and a perspective view of a front portion of a parallel loop bipolar electrode according to an embodiment of the present invention
  • FIG. 4 is a side view and a perspective view of a front portion of a parallel loop bipolar electrode according to an embodiment of the present invention
  • FIG. 5 is a cross-sectional view showing a front portion of a parallel loop bipolar electrode according to an embodiment of the present invention.
  • This embodiment provides a novel left and right parallel loop bipolar electrode, as shown in FIG. 2 to FIG. 5, which includes:
  • the positive electrode 10, the two ceramic insulating tubes 11, the metal sleeve 13, the hard tube 22, the two insulating tubes 12 and 21 which are separated from each other at one end and close to each other, the metal straight tube 14 with the flared, and the electrode fixing card 15
  • the metal sleeve 13 and the hard tube 22 are insulated from the metal straight tube 14 by the bifurcation of the branching insulations 12 and 21, respectively (see FIGS. 3 and 4 for details).
  • the front end of the metal sleeve 13 and the hard tube 22 are respectively fixed with a ceramic insulating tube 11, and one end of the positive electrode 10 is connected to one of the wires 16 through a ceramic insulating tube 11 in the hard tube 22, and the other end is supported by the metal sleeve 13
  • another wire 17 is welded to the corresponding metal sleeve 13
  • the outer sleeves of the two metal sleeves are respectively sleeved with the insulating sleeves 12 and 21, thereby It is insulated from the metal straight tube 14 (see Figure 4 for details).
  • the wires 16 and 17 pass through a straight metal tube 14.
  • the high frequency energy passes through the positive electrode 10 in the hard tube 22 and flows through the metal sleeve 13 to form a loop.
  • the rear section of the ceramic insulating tube 11 is covered by the front section of the metal sleeve 13 and the hard tube 22, and the front section of the ceramic insulating tube 11 is exposed; the metal sleeve The rear section of the tube 13 and the hard tube 22 is covered by the insulating tubes 12 and 21 so that the front sections of the metal sleeves 13, 22 are exposed.
  • the exposed front section of the metal sleeve 13 is exposed in a saline environment in use, the surface area of which is the surface area of the return electrode, and the surface area of the positive electrode 10 is the surface area of the semi-annular positive electrode exposed in the saline environment.
  • the surface area of the return electrode is between 5 and 16 times the surface area of the semi-annular positive electrode.
  • the end of the metal straight tube 14 is provided with a terminal 19, and the double-core wire 20 extends from the terminal 19, and the tail end of the terminal is further connected with a plug.
  • the wires 16 and 17 are connected to the double-core wire 20 after passing through the metal straight pipe 14.
  • the electrode fixing card 15 is welded to the outer wall of the straight metal tube for mating with the mirror rod of the endoscope.
  • the waterproof plug 18 is tightly fitted on the outer wall of the metal straight tube 14 , and is located between the electrode fixing card 15 and the terminal 19 .
  • the outer wall of the metal straight tube 14 is circular, and the waterproof plug 18 has a circular hole therein to avoid water leakage caused by the waterproof plug shaped hole of the background art.
  • the positive electrode is disposed in a semi-annular outer shovel shape, and the angle between the positive electrode and the metal sleeve is preferably 110 to 160 degrees.
  • the positive electrode is provided in a semi-annular inner hook shape, and the angle between the positive electrode and the metal sleeve is preferably 70 to 90 degrees.
  • the positive electrode 10 is generally semi-annular, and may also be a drum shape, a shovel shape or the like.
  • the hard tube 22 is not used as a return electrode, and an insulating material may be used. If an insulating material is used as the hard tube 22, the insulating sleeve 12 may be used.
  • the rear section of the insulated hard tube 22 is not sleeved with an insulating sleeve, but is closed with the rear section of the insulating sleeve, and the periphery of the closed portion is covered by the flared portion of the straight metal tube 14. Set coverage.

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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract

一种左右并列回路双极电极，在其前段部分，金属套管(13)与硬管(22)左右并列间隔设置，金属套管(13)与硬管(22)头部分别固定一陶瓷绝缘管(11)，正极电极（10）的一端和所述硬管（22）引出的一条带有绝缘层的导线（16）在其对应的一陶瓷绝缘管内（11）连接，另一条带有绝缘层的导线（17）与所述金属套管（13）焊接；金属套管(13)与硬管(22)的后段分别套设于两根绝缘管(12，21)内；在其后段部分，金属直管（14）的扩口处将所述两根绝缘管(12，21)的合拢的后段套设覆盖；金属直管（14）的尾端连接接线柱（19），接线柱（19）连接双芯导线（20），二带有绝缘层的导线（16,17）穿过金属直管（14）与双芯导线（20）分别对应连接；正极电极（10）的另一端固定于另一根绝缘管（11）内；高频能量通过所述金属直管（14）内的二带有绝缘层的导线（16,17）在工作介质中形成回路。该电极具有良好的防漏水特性，漏电流小。

Description

左右并列回路双极电极 技术领域
本发明涉及医疗器械技术领域，具体涉及微创手术用的电切镜所用的电极。
背景技术
前列腺肥大、增生是中老年男性发病率极高的常见病症，进行手术切除是最为有效的治疗方法。传统的开放式手术是在患者下腹部切开一个切口，再切开膀肮取出前列腺，这对正常的尿道生理结构损伤非常大。而且前列腺增生病多数是老年人，他们常伴有其它严重疾病，难于耐受开放手术所带来的创伤，因此各种微创的经尿道内治疗前列腺增生的方法，受泌尿外科医生的极大重视。经尿道前列腺电切镜电切术发明于欧美发达国家，由于这种手术无需在人体上开刀，大大减少了创伤，被公认是当前治疗前列腺增生的“金标准”。
发明专利CN 201492495 U公开的一种同轴回路双极电极，目前使用较为普遍。参见图1，该并列回路双极电极前段金属管分叉，金属管端口组装陶瓷管，后端由两根并排钢管31组成；正极电极35穿过钢管31连接导线36，在此电极中，并排钢管共同形成回路电极；相对应防水塞34开口与并排钢管形状很难一致。因防水塞开口异形非圆形，移动过程中不能保证防水塞与钢管之间接触完全密缝，由此导致漏水问题；钢管套上绝缘管后与防水塞的摩擦力增大，使得电极前后运动的阻力增加，影响医生手术，导致操作疲劳。且并排钢管共同作为回路电极，虽然表面有绝缘管，但因手术时间长，绝缘套可能发生磨损导致耐压性能下降，会有漏电风险。另，并排钢管相比单管占用空间较大，电切镜内鞘中盐水流动受阻，盐水对流不理想。
专利EP1072230A1展示另一种双极电极，该电极前段部分与上述CN 201492495 U描述的形状一致，后段部分有所区别，使用一根圆形钢管取代并排钢管，相对应防水塞开口也为圆形，如此可有效改善电切镜漏水现象；但圆形钢管仍然充当回路电极使用，因此钢管外表面绝缘套因磨损产生耐压性能下降，漏电的风险不能排除。且增加绝缘管后电极阻力变大，电极体积也会增加。
另外，市面上出现的前后双环双极回路电极，切割精确性和止血效果都不如单环；还有上下双环双极回路电极，虽克服以上问题，但手术视野受到影响，影响医生手术。
发明内容
有鉴于背景技术所述，本发明的目的是提供一种可同时解决漏水漏电问题的新型的并列回路双极电极。
本发明的左右并列回路双极电极，尽可能减少回路电极与人体接触面积和部位，减少电流对人体的刺激作用，同时保留单环切割手术的优势，另外解决市面用得较多的双极电极存在的密封不好，对流不理想，电极阻力大等缺陷，也解决了因绝缘层磨损产生的漏电问题。
本发明的目的是通过以下技术方案实现的：
一种左右并列回路双极电极，包括：
正极电极、二绝缘管、一作为负极电极的金属套管、一硬管、一端分离另一端合拢的呈分叉状的两根绝缘套管、带扩口的金属直管、二带有绝缘层的导线、双芯导线及接线柱；
所述双极电极的前段部分，所述金属套管与所述硬管左右并列间隔设置，金属套管和硬管头部分别固定一所述绝缘管，所述正极电极的一端和所述硬管引出的一条所述带有绝缘层的导线在其对应的一绝缘管内连接，另一条带有绝缘层的导线与所述金属套管焊接；所述金属套管和硬管的后段分别套设于所述两根绝缘套管内；在所述双极电极的后段部分，所述金属直管的扩口处将所述两根绝缘套管的合拢的后段套设覆盖；所述金属直管的尾端连接所述接线柱，所述接线柱连接所述双芯导线，所述二带有绝缘层的导线穿过所述金属直管与所述双芯导线分别对应连接；所述正极电极的另一端固定于另一根所述绝缘管内；
高频能量通过所述金属直管内的所述二带有绝缘层的导线在工作介质中形成回路。
另一种左右并列回路双极电极，包括：
正极电极、二绝缘管、一作为负极电极的金属套管、一绝缘硬管、一根绝缘套管、带扩口的金属直管、二带有绝缘层的导线、双芯导线及接线柱；
所述双极电极的前段部分，所述金属套管与所述硬管左右并列间隔设置，金属套管和绝缘硬管头部分别固定一所述绝缘管，所述正极电极的一端和所述硬管引出的一条所述带有绝缘层的导线在其对应的一绝缘管内连接，另一条带有绝缘层的导线与所述金属套管焊接；所述金属套管的后段套设于所述绝缘套管内；在所述双极电极的后段部分，所述绝缘硬管的后段和所述绝缘套管的后段合拢，其外围由所述金属直管的扩口处套设覆盖；所述金属直管的尾端连接所述接线柱，所述接线柱连接所述双芯导线，所述二带有绝缘层的导线穿过所述金属直管与所述双芯导线分别对应连接；所述正极电极的另一端固定于另一根所述绝缘管内；
高频能量通过所述金属直管内的所述二带有绝缘层的导线在工作介质中形成回路。
优选的，所述左右并列回路双极电极还包括电极固定卡，其焊接于所述金属直管的外表面，用于和内窥镜的镜杆配合。
优选的，所述金属套管的外直径为1mm－1.7mm，所述金属直管的外直径为1.5-2.2mm。
优选的，所述金属套管的未被所述绝缘套管覆盖的裸露的前段部分为回路电极，该回路电极的表面积为所述弧形正极的电极表面积的5倍16倍。
优选的，所述正极电极的形状为半环状、滚筒状或铲状。
优选的，所述绝缘管为陶瓷绝缘管。
相对于现有技术，本发明的优点包括：
本发明的左右并列回路双极电极的高频能量通过所述金属直管内的两根带绝缘层的导线形成回路，而金属直管本身不作为回路电极，不带电，因此其外围无需套设绝缘管，也就不存在背景技术EP1072230A1中所公开的双极电极中圆形钢管充当回路电极使用，因此导致的圆形钢管外表面绝缘套因磨损产生耐压性能下降的漏电风险，而且，在导线的外围，设有绝缘层和金属直管两层保护，极大地减少了保护层磨损漏电的风险；同时，由于本发明的防水塞紧密 套设于所述金属直管外围，且本发明的金属直管(除扩口处的其他位置)为圆形管，形状规则，因此，防水塞和金属直管之间没有间隙，可以避免背景技术中发明专利CN 201492495 U所公开的并列回路双极电极的防水塞开口异形，和钢管之间无法密封导致的漏水现象。因此，本发明使用更加安全，适合大范围推广。
附图说明
图1为本发明背景技术所述的现有技术电切镜双极电极的整体结构示意图；
图2为本发明实施例所述的并列回路双极电极的整体结构示意图；
图3为本发明实施例所述的并列回路双极电极的前段部分的俯视及透视图；
图4为本发明实施例所述的并列回路双极电极的前段部分的侧视及透视图；
图5为本发明实施例所述的并列回路双极电极的前段部分剖视图。
具体实施方式
本实施例提供一种新型的左右并列回路双极电极，如图2至图5所示，其包括：
正极电极10、两根陶瓷绝缘管11、金属套管13、硬管22、一端相互分离另一端紧贴靠拢的两根绝缘管12及21、带扩口的金属直管14、电极固定卡15、带绝缘层的导线16及17、防水塞18、接线柱19及双芯导线20。所述金属套管13及硬管22分别通过所述分叉绝缘12及21的二分叉与金属直管14绝缘(详见图3及图4)。
所述金属套管13及硬管22的前端分别固定陶瓷绝缘管11，正极电极10一端在硬管22内通过一陶瓷绝缘管11与其中一条导线16连接，另一端支架于金属套管13所对应的陶瓷绝缘管11内，另一条导线17与其所对应的金属套管13焊接，所述二金属套管的尾部外围分别套设有所述绝缘套管12及21，从而 与所述金属直管14绝缘(详见图4)。所述导线16及17穿过金属直管14。高频能量通过硬管22内的正极电极10，流经金属套管13形成回路。
在本实施例的左右并列回路双极电极的前段，所述陶瓷绝缘管11的后段被所述金属套管13、硬管22的前段套接覆盖，陶瓷绝缘管11的前段裸露；金属套管13、硬管22的后段被所述绝缘管12及21套接覆盖，使得金属套管13、22的前段裸露。其中，金属套管13裸露的前段在使用中裸露在盐水环境中，其表面积为回路电极的表面积，而正极电极10的表面积即为裸露在盐水环境中的半环状正极电极的表面积。优选的，回路电极的表面积为半环状正极电极表面面积的5倍至16倍之间。
金属直管14末端设有接线柱19，双芯导线20从接线柱19中延伸出来，接线柱的尾端进而接有插头。所述导线16及17穿过所述金属直管14后与所述双芯导线20对应连接。
所述电极固定卡15焊接于金属直管的外壁上，用于和内窥镜的镜杆配合。
所述防水塞18紧密贴合套设在所述金属直管14外壁上，具体位置是位于所述电极固定卡15与所述接线柱19之间。具体的，所述金属直管14的外壁为圆形，所述防水塞18内开圆形孔，可避免背景技术的防水塞异型孔导致的漏水现象。
优选的，所述正极电极设置为半环形外铲状，其与金属套管间角度较佳为110～160度。
优选的，所述正极电极设置为半环形内钩状，其与金属套管间角度较佳为70～90度。
事实上，本发明所要保护的技术方案不限于上述实施例所述，还可以有多种基于本发明构思的变形，例如：
所述正极电极10比较通用的是半环状，还可以是滚筒状、铲状等等。
所述硬管22不作为回路电极，可以选用绝缘材料，如果选用绝缘材料作为硬管22，则绝缘套管12可用可不用。例如可以是：所述绝缘的硬管22的后段不套设绝缘套管，而是和所述绝缘套管的后段合拢，合拢部分的外围由所述金属直管14的扩口处套设覆盖。
应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (7)

  1. 一种左右并列回路双极电极，其特征在于，包括：
    正极电极、二绝缘管、一作为负极电极的金属套管、一硬管、一端分离另一端合拢的呈分叉状的两根绝缘套管、带扩口的金属直管、二带有绝缘层的导线、双芯导线及接线柱；
    所述双极电极的前段部分，所述金属套管与所述硬管左右并列间隔设置，金属套管和硬管头部分别固定一所述绝缘管，所述正极电极的一端和所述硬管引出的一条所述带有绝缘层的导线在其对应的一绝缘管内连接，另一条带有绝缘层的导线与所述金属套管焊接；所述金属套管和硬管的后段分别套设于所述两根绝缘套管内；在所述双极电极的后段部分，所述金属直管的扩口处将所述两根绝缘套管的合拢的后段套设覆盖；所述金属直管的尾端连接所述接线柱，所述接线柱连接所述双芯导线，所述二带有绝缘层的导线穿过所述金属直管与所述双芯导线分别对应连接；所述正极电极的另一端固定于另一根所述绝缘管内；
    高频能量通过所述金属直管内的所述二带有绝缘层的导线在工作介质中形成回路。
  2. 一种左右并列回路双极电极，其特征在于，包括：
    正极电极、二绝缘管、一作为负极电极的金属套管、一绝缘硬管、一根绝缘套管、带扩口的金属直管、二带有绝缘层的导线、双芯导线及接线柱；
    所述双极电极的前段部分，所述金属套管与所述硬管左右并列间隔设置，金属套管和绝缘硬管头部分别固定一所述绝缘管，所述正极电极的一端和所述硬管引出的一条所述带有绝缘层的导线在其对应的一绝缘管内连接，另一条带有绝缘层的导线与所述金属套管焊接；所述金属套管的后段套设于所述绝缘套管内；在所述双极电极的后段部分，所述绝缘硬管的后段和所述绝缘套管的后段合拢，其外围由所述金属直管的扩口处套设覆盖；所述金属直管的尾端连接所述接线柱，所述接线柱连接所述双芯导线，所述二带有绝缘层的导线穿过所述金属直管与所述双芯导线分别对应连接；所述正极电极的另一端固定于另一根所述绝缘管内；
    高频能量通过所述金属直管内的所述二带有绝缘层的导线在工作介质中形 成回路。
  3. 根据权利要求1或2所述的左右并列回路双极电极，其特征在于：其还包括电极固定卡，其焊接于所述金属直管的外表面，用于和内窥镜的镜杆配合。
  4. 根据权利要求1或2所述的并列回路双极电极，其特征在于：所述金属套管的外直径为1mm-1.7mm，所述金属直管的外直径为1.5-2.2mm。
  5. 根据权利要求4所述的左右并列回路双极电极，其特征在于：所述金属套管的未被所述绝缘套管覆盖的裸露的前段部分为回路电极，该回路电极的表面积为所述弧形正极的电极表面积的5倍16倍。
  6. 根据权利要求1或2所述的左右并列回路双极电极，其特征在于：所述正极电极的形状为半环状、滚筒状或铲状。
  7. 根据权利要求1或2所述的左右并列回路双极电极，其特征在于：所述绝缘管为陶瓷绝缘管。
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