CN102860870A - Bipolar operation electrode device and manufacturing method thereof - Google Patents

Abstract

The invention provides an electrode device for medical operations and a manufacturing method thereof. The electrode can be used for tissue dissection or tissue drying or tissue ablation or low-temperature coagulation during the operations and consists of an electrode rod, an electrode handle, an electrode cable and a plug of a radio frequency (RF) power supply. Excitation contacts and counter-current contacts of the electrode consist of guide wires and metal layers arranged on the guide wires respectively; and contact conductors are insulated against each other and form the bipolar operation electrode. The shapes and sizes of different electrode contacts and the form of the electrode rod are provided, and the operating modes of the excitation contacts are adjusted, so that the bipolar electrode is particularly suitable for the actual requirements of different surgical operations; and the power output form and magnitude of the electrode are distributed and adjusted conveniently on the bipolar electrode, an electric field is prevented from passing through a human body, the safety of electric operative treatment is improved, and accessory injury caused in the treatment process is controlled and reduced to the maximum limit.

Description

A kind of bipolar surgery electrode assembly and method

Affiliated technical field

The present invention relates to a kind of medical operation electrode assembly and preparation method thereof, especially can in operation, carry out anatomic tissue, or tissue is dry, or ablation of tissue, or the bipolar surgery electrode of low temperature blood coagulation.

Background technology

At present, known procedures electrode device, a class is that exciting electrode contact and return electrode contact separate, and the contact that excites of needle-like is treated focus, and the backflow contact of lamellar (electrode slice) is attached to patient, is referred to as monopolar electrode on the medical speciality.Another kind of is to provide simultaneously in work end to excite contact and current reflux contact, is referred to as bipolar electrode on the medical speciality.Therefore electric field has more advantage in safety in utilization not by human body during bipolar electrode work.

In the surgical medical field, be used for tweezer shape bipolar electrode---the bipolar tweezer of blood coagulation, there has been the use of last 100 years historical.Another kind of will excite contact and backflow contact to be positioned on the working end of same knife bar, and anatomic tissue, drying can be provided simultaneously, melt the bipolar electrode with blood coagulation, and owing to its distinctive safety and effectiveness, begin more to be paid attention to.But actual medical is used comparatively complicated and various, in different medical operating fields, the version requirement of procedures electrode is not quite similar, and the electrode form that more corresponds to actual needs need to be arranged.

The size of each contact of bipolar electrode working end, shape and placement form directly affect form and distribution that bipolar electrode forms electric field, and the effect that contact form difference produces is also fully different.

The procedures electrode that uses in interventional therapy, shape are comparatively elongated, and need to be used in conjunction with electron image equipment.The RF high-frequency electrode is equivalent to a high-frequency emission antenna when loading, peripheral electronic equipment is formed high-frequency electromagnetic disturb.For improving surgical effect and safety, the interference that reduces the electrode pair image documentation equipment is extremely important.

Summary of the invention

In order to adapt to medical operating to the actual requirement of ambipolar procedures electrode, overcome electrode actual functional capability defective, be convenient to simultaneously processing, the invention provides a kind of medical bipolar electrode device, welding tip placed one or more groups electrode contact (different excite the voltage that applies on the contact not simultaneously, will be by mutually insulated; Each excites and has consisted of one group of contact between contact and the backflow contact), this electrode can not only be realized multiple treatment function simultaneously, can also electromagnetic shielding be set easily, makes things convenient for operation technique, brings into play to greatest extent therapeutical effect.

The technical solution adopted for the present invention to solve the technical problems is:

One deck insulation is set outside a wire guide, and the metallic conductor of far-end is as the contact that excites of electrode, and seal wire itself is as the electrified wire of contact, and the other end of seal wire is electrically connected to the live wire of RF (radio frequency) feed cable.We claim this electrode cores that surperficial insulated seal wire is bipolar electrode.

On above-mentioned electrode cores, the conductive metal level of one deck is set, its length can expose from the metal level two ends insulation of electrode cores less than the insulating barrier on the electrode cores.Insulate at the upper outside one deck that covers of metal level.In the working end, this metal level exposes the outer part of insulating barrier as the backflow contact of electrode, and the contact that excites of it and electrode cores forms one group of bipolar contact.Metal level itself will be as the electrical conductor of backflow contact, and metal level and external insulation thereof consist of the electrode stem of electrode, and the other end of metal level is electrically connected to the ground wire of electrode supply cable.

Electrode stem is fixed on the electrode handle front end, the end that in handle, excites contact and backflow contact respectively with being electrically connected of cable live wire and ground wire, cable is drawn from the rear end of handle, is connected with the RF attaching plug, thereby has consisted of the main body of procedures electrode.On one group of contact pin an impedance device is installed in the spininess plug, so that the RF power supply detects the type of differentiating the access electrode, the corresponding output mode of Lookup protocol and voltage range; This device can be resistance, electric capacity or inductance, and impedance is 0 also to be a kind of status recognition.

In the back of electrode stem backflow contact, at a certain distance some obvious scale and indications of mark-on.Be convenient to patient's degree of depth that control electrode thrusts tissue when operation technique, the information of prompting patient's welding tip and working column relative position.

Can be in above-mentioned handle, impedance device of series connection in exciting the wire of contact such as resistance, electric capacity or inductance, by adjusting the impedance of this device, arranges the mode of operation that excites contact.

Can outside electrode reflux the external insulation layer of conductive metal layer, the cold metal level of one deck be set, and be electrically connected with the screen layer of shielded cable, as the electromagnetic shielding of electrode stem.

Can outside electrode refluxes the external insulation layer of conductive layer the metal level of one deck band external insulation be set, the metal part that expose the working end excites contact as second, shares above-mentioned electrode backflow contact, forms second group of bipolar contact; Second is electrically connected with the live wire of cable after exciting impedance device of contact conductor afterbody series connection, by the impedance of adjusting this device the second mode of operation that excites contact is set.By that analogy, can the bipolar contact of many groups be set at welding tip.

Can be at the electrode stem middle part or near handle one side, the angle α of a little radian of folding (angle that the electrode stem front end is axial and the handle axial direction forms) makes handle avoid the electrode stem axial location.Be beneficial to the patient along electrode stem vertical (thrusting) operation electrode, avoid blocking patient's sight line.

Can be at the electrode stem middle part or near working end one side, the angle β of a large radian of folding (angle that the electrode stem front end is axial and the handle axial direction forms), make welding tip avoid the electrode stem axial location, avoid blocking patient's sight line, be beneficial to along handle radially (thrust) operation and electrode contact along plane operations.

Can be at little radian bent angle γ of front end folding of electrode stem.Kind electrode is pulled electrode stem directly first by rigid casing (such as puncture tube or endoscopic working channel etc.) time, and after welding tip passed through sleeve pipe, electrode stem can be by the original angle of recovery stress elastic return.After passing through rigid casing, can be by the elasticity of sleeve pipe and electrode stem, the stretching electrode is adjusted the angle of electrode stem front end, also can pass through vertically rotation electrode handle, make electrode tip can process more large-area tissue, and after operation is finished, from sleeve pipe, withdraw from electrode tip easily and be not stuck.

The invention has the beneficial effects as follows, make electrode be more suitable for different operating actual needs, simultaneously on bipolar electrode, distribute easily and adjust power mode output and the magnitude of electrode, bucking electrode radiation interference in case of necessity, improve effect and safety, control to greatest extent and reduce the pair damage of therapeutic process.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the generalized section of welding tip of the present invention.

Fig. 2 be Fig. 1 a working end excite contact embodiment schematic diagram.

Fig. 3 be Fig. 1 another working end excite contact embodiment schematic diagram.

Fig. 4 is that Fig. 1 electrode excites the connected embodiment schematic diagram of impedance device of contact.

Fig. 5 is the embodiment schematic diagram that Fig. 1 electrode adds provided with shielding layer.

Fig. 6 is that Fig. 1 welding tip arranges two groups of contact embodiment schematic diagrams.

Fig. 7 is the embodiment schematic diagram at the electrode stem folding γ angle of Fig. 1.

Fig. 8 is the embodiment schematic diagram at the electrode stem folding α angle of Fig. 1.

Fig. 9 is the embodiment schematic diagram at the electrode stem folding β angle of Fig. 1.

The specific embodiment

The profile of Fig. 1 electrode stem working end.Excite contact to be consisted of by the wire guide 4 that exposes insulation among the figure; It is outer to arrange one deck insulation 5, and insulating barrier 5 is made by non-metal insulating material, and such as materials such as resin, plastics, rubber or potteries, its length is less than the length of seal wire 4; The insulating barrier 5 outer layer of metal layers 6 that arrange, its length is less than the length of insulating barrier 5; Metal level 6 can hollow, and the tubular form of outer wall closure also can be the thin layer form of other non-closures, is to map conveniently, adopt the tubular film signal among the figure; Metal level 6 outer one decks that arrange insulate 7, and its length is less than the length of metal level 6; Metal level 6 exposes the part of insulating barrier 7, consists of the backflow contact of electrode.

Among the embodiment of Fig. 2, electrode excites contact 4 to expose the part of insulating barrier 5, and external diameter is greater than 5 internal diameter, the external diameter less than or equal to 5, contact front end band point.

Among the embodiment of Fig. 3, excite the insulating barrier 5 of 6 of contact 4 and backflow contacts, its external diameter is greater than 6 internal diameter, the external diameter less than or equal to 6, and contact can be with point.

Among the embodiment of Fig. 4, be electrically connected with the live wire of electrode cable behind the impedance device of conductor series connection 11 that excites contact 4 to expose in electrode handle 3,11 can be resistance, electric capacity or inductance, and its impedance determines to excite the mode of operation of contact.

Among the embodiment of Fig. 5, at insulating barrier 7 outer surfaces, one deck tubulose thin metallic tubd 9 is set, metal tube 9 no powers are as the screen layer of electrode stem; Electrode stem shielded metal pipe 9 is electrically connected with screen layer with shielded cable.

Among the embodiment of Fig. 6, an insulating barrier 12 is set metal level 9 is outer.Be electrically connected with the live wire of electrode cable after the afterbody series impedance element 11 9; Working end 9 is exposed 12 part and is excited contact as second of electrode.The metal part that internal layer 6 front ends expose is made the backflow contact of second group of contact simultaneously;

Among the embodiment of Fig. 7, at the γ radian of position folding near electrode stem 2 work back, termination.When γ greater than 5 °, less than 12 °.Electrode can by the elasticity of electrode stem recovery stress, pass and use in the sleeve pipe of rigidity.

Among the embodiment of Fig. 8, the bent angle α of a little radian of electrode stem 2 postmedians folding, the α angle is 15 °-45 °.Make the patient in the tunnel-shaped cavity during along the electrode stem axial operation, sight line is not subjected to the impact of electrode handle.

Among the embodiment of Fig. 9, the angle β of a large radian of electrode stem 2 middle front parts folding, the β angle is 30 °-90 °.The patient is convenient to along the electrode stem application of force radially, simultaneously in open surgery during along the treatment plane operations sight line be not subjected to the impact of electrode stem and handle.

Claims (10)

1. a medical bipolar electrode is comprised of electrode stem, electrode handle, electrode cable and attaching plug.It is characterized in that its metal excites contact to connect a wire guide, backflow contact and conductor thereof are arranged on the seal wire; Seal wire and metal interlevel arrange the insulation isolation; Metal level arranges insulating barrier outward; Seal wire and metal level excite contact and backflow contact what the metal of bare front end formed bipolar electrode; Seal wire and metal level rear portion conductor are electrically connected with live wire and the ground wire of electrode cable line respectively in handle; Sealing coat is made of insulant such as plastic cement, rubber, resin, silica gel or potteries, and metal level is made of lamellar, recessed lamellar or tubular metal conductor.Outermost layer at electrode stem adds indexing.

2. described electrode according to claim 1 is characterized in that can being the γ angle at front end at radian of the back of electrode stem working end folding, or the β angle of middle front part, or the α angle of postmedian.

3. described electrode according to claim 1 is characterized in that exciting the contact front end to expose insulated part, and external diameter is greater than the external diameter of seal wire thereafter, less than or equal to the maximum outside diameter that insulate between itself and the backflow contact, front end band point.

4. described electrode according to claim 3 is characterized in that exciting the insulation between contact and backflow contact, and its front end exposes the external diameter of backflow contact part, greater than the internal diameter of backflow contact, less than or equal to the maximum outside diameter of backflow contact.

5. described electrode according to claim 4 is characterized in that can being the β angle of middle front part at radian of back, electrode stem work termination folding, or the α angle of postmedian.

6. described electrode according to claim 4 is characterized in that, electrode excites impedance device of seal wire series connection of contact to be electrically connected with the live wire of cable, and impedance device can be resistance, electric capacity or inductance.

7. described electrode according to claim 3 is characterized in that, outside the insulation of reflow metal layer, the cold thin metallic tubd of one deck is set, and it is electrically connected with screen layer with shielded cable.

8. described electrode according to claim 7 is characterized in that can being the γ angle at front end at radian of back, electrode stem work termination folding.Outermost layer at electrode stem adds indexing.

9. described electrode according to claim 1, it is characterized in that, outside the insulation of reflow metal layer, the energising metal level of one deck band external insulation is set, its bare front end metal part excites contact as second, and its rear portion directly or behind the impedance device of connecting is electrically connected with a live wire of cable; This contact and backflow contact consist of another and organize bipolar contact in the working end.The like, the bipolar contact of many groups can be set in the working end.

10. described electrode according to claim 9 is characterized in that can being the γ angle at front end at radian of the back of electrode stem working end folding, or the β angle of middle front part, or the α angle of postmedian.Outermost layer at electrode stem adds indexing.

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