CN100493468C - Device for the interstitial space coagulation - Google Patents
Device for the interstitial space coagulation Download PDFInfo
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- CN100493468C CN100493468C CNB2005800060887A CN200580006088A CN100493468C CN 100493468 C CN100493468 C CN 100493468C CN B2005800060887 A CNB2005800060887 A CN B2005800060887A CN 200580006088 A CN200580006088 A CN 200580006088A CN 100493468 C CN100493468 C CN 100493468C
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Abstract
The invention relates to a device for the interstitial coagulation of tissues, which comprises at least one electrode via which a HF coagulation current can be passed into the tissue. The device is also configured in such a manner as to increase the evenness with which the tissue is treated. According to the invention, the electrode is configured as a three-dimensional body that can be expanded to different degrees or is mounted on such a body in such a manner that the electrode can be maintained in continuous electrical contact with the tissue during coagulation by continually or gradually expanding the body.
Description
The present invention relates to a kind of equipment that is used for the interstitial coagulation of tissue.
In HF surgery, particularly in the endoscopic applications field, known various devices can with from the electric energy transmitting of HF surgery utensil, for example high frequency unit to the particular tissues position of being treated.
Known electrode directly acts on tissue by contact with energy.The problem of its existence is that in some cases, tissue has been heated to by the degree of carbonization, just burns fully destroyed.
Another problem of kind electrode is that electrode meeting adhesion organizationally.If this thing happens, in removing the process of electrode, tissue will be torn.In order to reduce the risk of adhesion, can on electrode, cover a kind of suitable material usually.Kind electrode is disclosed, for example in document DE 199 41 105 C2.
The problems referred to above especially appear at and relate to the occasion that solidify in the gap, solidifying of liver tumor for example because in the middle of electrode is implanted to the tissue of being treated in such cases, such as this tissue of puncture, the result be electrode be organized fully surround.At this moment, can be burnt and/or stick in the probability that the danger on the electrode takes place big especially for tissue.In case this thing happens and since electrode with the tissue between contact the generation huge resistance, can't realize equally distributed inactivation (devitalisation); That is to say, organize and do not obtain isostatic solidifying.
Another problem is, tissue contracts in the process that solidify in the gap (dehydration), so electrode no longer is thereon adjacent.The slit occurred between electrode and the quilt tissue for the treatment of, the exsiccant result of tumor is increased the contact resistance between electrode and the tissue, so the scope that electric energy can act on to be restricted.It is unbalanced that this has also caused solidifying, perhaps even may cause not producing any coagulation result.
For example, document US 5 090 105 A disclose a kind of device for excising, and it comprises that one is used to implant the in-house intervention electrode of being treated.Described intervention electrode interior is provided with supplemantary electrode, and when implantation was finished, these electrodes were just released from getting involved in the electrode, thereby are fixed on organization internal.These electrodes are made by memorial alloy, and when being higher than the temperature of certain level by as under the tension force.In the process of solidifying, when these electrodes stretch out from getting involved electrode, will tend to expansion and be original state, the tissue around thrusting.Adopt above-mentioned apparatus, the just easier generation of aforesaid problem.And, because these electrodes only rely on the internal force that impels its expansion, thrust tissue in a kind of inharmonic mode, so this mounting means of electrode causes the isostatic amount of solidifying of more difficult acquisition.
The object of the present invention is to provide a kind of equipment that is used for the interstitial coagulation of tissue, its improvements are to make tissue can accept more isostatic treatment.
Above-mentioned purpose is to obtain by a kind of equipment that is used for the interstitial coagulation of tissue, and it comprises at least one electrode, and by this electrode, HF coagulation current can be transferred in the tissue.Described electrode can be self be configured to can in varying degrees the expansion the three-diemsnional electrode main body, perhaps be attached in the following manner on the auxiliary main body of such three-dimensional: by the auxiliary main body of three-dimensional continuously or progressively expansion, make electrode in process of setting can with electrically contacting that tissue remains unchanged.
Main points of the present invention are, described main body, be described electrode itself or the expandable body that the is provided with described electrode implanted tissue of being treated of energy under unexpanded mode, and can be according to solidifying the degree of depth, just relying on the condition of setting expand in a kind of in check mode in process of setting.So main body (comprise three-diemsnional electrode main body and three-dimensional auxiliary main body, down with) is configured, and can be operated by this way: in process of setting, it follows the tissue that the quilt that leaves electrode is treated under in check mode.This expansion of main body can be carried out or manual guidance automatically, and is based on the parameter of solidifying the degree of depth that is used to weigh that is detected and carries out.In check solidifying is achieved the balanced inactivation of tissue.And along with the continuous expansion of electrode, its pull strength that applies has excised the tissue of being treated in process of setting, and therefore, this point itself has just guaranteed that equilibrium solidifies.
The described equipment that solidifies in the gap of being used for can be implanted the tissue of being treated by for example a kind of adnexa of the tissue that is suitable for puncturing, and perhaps also this equipment self can be constructed to be permeable to the puncture tissue.Described equipment can be designed for directly using or endoscope uses.
In first preferred embodiment, provide a kind of and be used to rely on coagulating current to control the control device of the expansion amount of main body.Described control device is preferably and is combined in the HF surgery apparatus, perhaps also can be used as a kind of external module.Described control device is bonded in the described equipment further, that is, mainly be in the electrosurgery utensil, and is designed for and detects reflection and solidify the different parameters of the degree of depth, is coagulating current herein.Therefore, for example determine because the increase of contact resistance has been caused in the above-mentioned slit of formation between electrode and tissue is feasible by the corresponding reduction that detects coagulating current intensity (strength).Described control device is so design also, and is so that described main body is controlled on the basis of detected parameter, just based on detected current intensity, like this then the degrees of expansion of described main body is changed along with detected parameter.So in the case, described main body is expanded to till the healing of described slit always, thereby electrode and tissue can remain required the electrically contacting of follow-up process of setting.Therefore, can both guarantee the best result of solidifying in each stage of solidifying.
In addition, also can construct described control device like this: the relevant information that detected value obtains in the mode of this current intensity that promptly is detected by for example visual display.Thereby the operator can be based on the manually expansion of the described main body of control of described information.
Described control device preferably has a transducer, is used to measure coagulating current and the value that will record is transferred to control device.Reliable assessment to electric current also can obtain by for example electric current monitor well known in the art.
In addition, the slit that is forming can be detected by pressure measxurement.For achieving this end, the control device that suitably combines described measured value transducer is design like this: for example, the measurement target tissue is applied to the pressure on the electrode, when this pressure is brought down below preset threshold, described main body should be controlled, with abundant expansion, thereby between electrode and tissue, keep suitable distance.Described measured value transducer is preferably a voltage sensor at this.Also can use Hall effect transducer, the variation that is used to detect magnetic field is used as the function of electrode skew.
When coagulating current be added in pressure on the electrode when simultaneously measured, can also make about whether organizing and to be burnt the prediction that whether can take place to undesirable degree or electrode adhesion.That is to say that if measure suitable pressure, but electric current also reducing simultaneously, then can think current intensity to reduce not be that slit by forming between electrode and the tissue causes.
In second preferred embodiment, described control device is design like this and is provided with: the coagulating current between electrode and the tissue can be made as special electric current density.In each stage in the three-dimensional body expansion, all form the specific electrodes surface area.Under given constant current intensity, electric current density can reduce gradually along with the expansion of main body, and is big because electrode area becomes.Therefore, described control device can be used for electric current density is adjusted to a required value, to reach best coagulation result, and current intensity can be adjusted thereupon, even thereby when electrode surface increases, can guarantee that also each moment in process of setting is all obtained best coagulation result.This adjustment of current intensity can also can manually be finished automatically.
The electric current density that records and where necessary the follow-up adjustment of coagulating current assessment to the main body expansion state is provided, thereby also provide solidifying the assessment of the degree of depth.When electric current density is brought down below preset threshold, then finished solidifying to a certain define objective tissue regions.In order to proceed to solidify, main body must be expanded, and follows new solidify and can be observed by the variation of electric current density.Then, can manually finish the adjustment of a certain suitable current intensity.Yet it also is feasible that control device is designed to be able to automatic setting current intensity.
Described control device preferably can be designed to electric current density can independent regulation, irrelevant with the expansion state of main body.Like this then different solidifying just can be used for different tissues or solidification stages.For example, if do not wish hemorrhage generation that occur, add high current density and just can strengthen solidifying.
A solution according to the present invention is to be provided for the measuring device of the expansion state of definite main body.Therefore, if expansion is controlled automatically, then can know at any time and solidify the degree of depth.For example, expansion state can be exported by the mode of visual display.When main body is when expanding under manual operation, the operator can make corresponding adjustment according to this demonstration.Measuring device herein can utilize above-mentioned measured value transducer.
Preferably, the electrode assemblie of described equipment comprises a therapeutic electrode, and it has the part liquid impermeable at least and can contact with certain part of tissue; Also comprise a feeding mechanism, can be delivered to therapeutic electrode by this device conductive liquid; Also comprise an electric supply installation, be used in the following manner HF coagulation current being passed to therapeutic electrode: the high-frequency treatment electric current can be applied to the liquid by therapeutic electrode.Therefore, so the utensil of structure preferably comprises a distensible hollow body, and it can be implanted in the tissue of being treated when unexpanded mode, and the tissue of following shrink, solidifying by the expansion of self in process of setting.Simultaneously, except tissue by the excision from then on, this design also has and prevents that effectively electrode from sticking in structural effect, because electric current is by liquid conductive.Described liquid, just the electric conductivity of solution (as Ringer's solution or pure saline solution) makes high frequency electric arrive the tissue site of being treated.Solution is the while cools tissue in the process of treatment, and therefore organizing hardly may be hotter than the boiling point of solution.
In a preferred embodiment, described therapeutic electrode comprise one be positioned at its inboard, just with organize can flexibly expanding or folding surface-element of an opposite side, this surface-element is provided with an inner space, can be used to apply intrinsic pressure, thereby this surface-element can be expanded along with the increase of intrinsic pressure.Described surface-element makes electrode and is achieved by the equally distributed contact between the tissue for the treatment of, and makes the easy maintenance that electrically contacts between electrode and the tissue, to obtain isostatic solidifying.In the process of solidifying, by increasing the pressure of described inner space, the expansion of required main body (is described surface-element at this) is achieved by the simplest mode.
Described surface-element is preferably ring-type or spherical.Described therapeutic electrode can be configured to for example form of balloon catheter, also is a kind of form that the operator has been familiar with.
In one embodiment of the invention, described inner space is filled with conductive liquid.Therefore, in this constituted, conductive liquid can produce the intrinsic pressure of stretching, extension/described surface-element of expansion simultaneously also as a kind of medium by this medium.At this, described therapeutic electrode is configured, and makes it be large enough to can produce intrinsic pressure on the one hand to the mobile resistance of conductive liquid, and the enough liquid of gushing out on the other hand is to provide reliable electrical contact.For realizing this purpose, described therapeutic electrode can adopt the thin film, felt material or the fabric that allow the liquid flow of requirement.In any case described therapeutic electrode preferably substantially is made of heat stable material, particularly the tetrafluoroethene material.
Preferably, described conductive liquid comprises polyvinylpyrrolidone (PVP), and a kind of surfactant or similar material can change the viscosity of conductive liquid and can not cause any harmful side effect to the treatment that will carry out.
The liquid that use is spread by expansible electrode is not got rid of electrode surface self and is had electric conductivity yet.A feasible embodiment is, electrode is made by a kind of lactoprene that possesses electric conductivity by for example bond part.
Constitute by certain, described intrinsic pressure can with promote the pressure independent that liquid is gushed out from therapeutic electrode, for example, described inner space comprises a distensible adnexa main body, itself and described conductive liquid are isolating on hydraulic pressure.So, when extremely expanding, do not have excessive conductive liquid yet and gush out even can guarantee.Especially, described surface-element can be configured to many levels, so liquid flows along surface direction with less flow resistance on an internal layer, then can be directed to perpendicular to this surface direction on a skin.This formation can create relatively more simply.In order to improve the homogeneity that liquid is gushed out, the sealing coat with big flow resistance is installed between described internal layer and the skin.
In all cases, electric current all be by one as far as possible near therapeutic electrode have low-resistance conductor, for example lead is passed to conductive liquid.
Problem for fear of being caused by excessive gushing out of inevitable conductive liquid in a most preferred embodiment of the present invention, provides a kind of aspirator that is used to siphon away excess liq.
Described Electrosurgical instrument, just described equipment can be configured to one pole and solidify utensil.Under single power supply guiding (current-supply lead), (patient) is maintained on another current potential when the treatment of tissue quilt.In another embodiment of the present invention, can use the bipolar electrode utensil by the electrode of two almost parallels.Just, described therapeutic electrode is made of at least two parts that are electrically insulated from each other, thereby forms bipolar electrode, does not therefore need to amplexiform ground electrode (neutral electrode) on one's body patient again.
Preferably, described electrode is configured to use an excision electric current.Reduced like this that cancerous cell may d/d risk when in the implanted tumor of electrode.
More embodiment of the present invention will embody by dependent claims.
Below, the more detailed description that exemplary embodiments is carried out in conjunction with the drawings, the present invention will obtain explanation.Wherein:
Fig. 1 is a functional block diagram, and expression has the HF surgery that is used for the equipment that solidifies in the gap and constitutes;
Fig. 2 represents the partial cross-sectional perspective view of first embodiment of described equipment;
Fig. 3 represents the longitudinal sectional drawing of described equipment second embodiment;
Fig. 4 represents the longitudinal sectional drawing of the 3rd embodiment of described equipment; With
Be designated as the amplification view of the part of V in Fig. 5 presentation graphs 4.
In the following description, the identical label parts that are used to represent identical parts or have same action.The adnexa label list:
1 HF surgery apparatus
2 high frequency generators
3 control device
4 measured value transducers, measurement device
5 display
6 input connectors
7 first input connectors
8 second input connectors
9 end blocks
10 electrodes, therapeutic electrode
11 extensible surface-elements
12 inboards
13 inner spaces
14 three-dimensional auxiliary main bodys
15 internal layers
16 skins
17 sealing coats
20 supply pipes
22 suction pipes
23 suction inlets
The 30 power supply utmost points
The 31 power supply utmost points
40 equipment, the electrosurgery utensil
The N ground electrode
The functional block diagram of Fig. 1 is represented to have a HF surgery that is used for the equipment that solidifies in the gap and is constituted.Assembly to explaining that the present invention plays an important role in this HF surgery constitutes comprises that the equipment 40 that is used for solidifying in the gap has been shown in this with schematic.
In one pole constituted, the high frequency electric that is produced by high frequency generator 2 was passed to Electrosurgical instrument 40 (herein for being used for the equipment that solidify in the gap), and this apparatus is by exciting electrode 10, and just the one pole coag electrodes is applied to electric current in the tissue of being treated; In this method, return high frequency generator 2 again behind the health arrival ground electrode N of electric current by patient.And bipolar formation is without any need for ground electrode, because set up current channel between two electrodes of electrosurgery utensil.
The core of described HF surgery apparatus 1 is controlled high frequency generator 2, the coag electrodes 10 that is used to produce high frequency voltage and high frequency electric is transferred to electrosurgery utensil 40.High frequency generator 2 is connected with the control device 3 of the coag electrodes 10 that is used to control electrosurgery utensil 40.The measured value transducer related with control device 34 is illustrated equally at this, and its effect is to detect to be used to weigh to solidify the various parameters that the degree of depth is the contact resistance between electrode 10 and the tissue.
Distensible electrode 10 (promptly, the three-diemsnional electrode main body), perhaps (promptly with the distensible main body 14 of electrode 10, three-dimensional auxiliary main body) be configured like this and drive: it is implanted tissue of being treated under unexpanded mode, and in (particularly gap) process of setting, expanded, thereby along with shrink back (just as what usually take place) of tissue with respect to electrode, electrode can be followed it under controlled mode.In this process, the expansion of main body both can take place automatically, also can manually produce, and can be dependent on measured be used to weigh the parameter of solidifying the degree of depth.In check solidifying is achieved isostatic tissue devitalization.
For example, having the equipment that solidifies in the gap of being used for of expandable body (three-diemsnional electrode main body, three-dimensional auxiliary main body 14) can be by an implanted tissue of implanting device (not shown) that is suitable for puncturing tissue; In addition, equipment 40 self also can be configured to the puncture tissue.Equipment 40 can be designed as direct use or is used for endoscopic applications.
With reference to figs. 2 to 5, the specific embodiments of electrosurgery utensil 40 and related electrode will obtain more detailed description.
Tissue dewatering in the process that solidify in the gap, thus shrink because of solidifying.Therefore, electrode 10 no longer contacts with the tissue of being treated, and the formation in this slit causes the contact resistance between electrode 10 and the tissue to increase.The result reduces the intensity of coagulating current.
In addition, measured value transducer 4 and control device 3 are related to solidify the parameter of the degree of depth to detect other indications, and for example contact resistance itself also is feasible.
The slit that is beginning to form also can be detected by pressure measxurement.For realizing this purpose, control device 3 is designed, and for example the measurement target tissue is applied to the pressure on the electrode 10, and drops to when being lower than preset threshold value when this pressure, main body should be controlled, thereby it can fully be expanded to keep suitable distance between electrode 10 and tissue.At this, measured value transducer 4 preferably is constructed to electronic pressure transmitter.Also can use Hall effect transducer, detect the variation in the magnetic field that causes by the electrode skew.
At this, the adjusting of current intensity also is both can also can manually carry out automatically.Because electric current density has finally reflected the expansion state of main body, such as, the surgeon can impel the main body expansion in order to reduce electric current density.
In order to adapt to dissimilar tissues and solidification stages, and/or the time that can not expect for example seriously bleed, control device 3 is designed to: current intensity and/or electric current density expansion state relatively are conditioned independently.Such as, strengthen if desired solidifying, then can achieve the goal by adding high current density, and irrelevant with expansion state.
If the expansion state that provides measuring device to come sonde body, this information can show by for example display 5, preferably is visual display unit.If the expansion of main body is by manual guidance, the operator can reference display 5 make suitable adjusting.The measured value transducer that measuring device is can embedded one above-mentioned perhaps is provided as utensil independently.
Fig. 2 to 5 shows different types of equipment 40 of solidifying in the gap of being used for.Equipment in these figure all is designed to insert in the service pipe of endoscope.Endoscope then must be constructed to be permeable to the tissue that punctures and treated.But these utensils also can be designed to self be suitable for puncture.
As shown in Figure 2, this equipment comprises therapeutic electrode 10, and it is shown as at this and is in expansion state, and it mainly is an extensile surface-element 11 that this electrode is constructed on the whole.Via elasticity or inflexible supply pipe 20, conductive liquid (indicated as arrow) can enter the inner space 13 of therapeutic electrode 10 by supply pipe 20 as Ringer's solution or saline solution.Extensible or extensible surface-element 11 is permeable fully at this, and the liquid that enters inner space 13 can be exuded to the outside by therapeutic electrode 10 from the inboard 12 of extensible surface-element 11.
13 li power supply utmost points 30 that a wire form is arranged in the inner space, it mechanically contacts with therapeutic electrode 10 at the end of therapeutic electrode 10 by electric insulation end block 9.The power supply utmost point 30 is connected to the high frequency generator (not shown).
Solidify in order to carry out the gap, such as with the electrode implantation tumour, entire equipment is pushed into and is positioned in advance by the service aisle of the endoscope of therapentic part; When being mounted like this, surface-element still is in contraction state, rather than swelling state shown in Figure 2.The tip of utensil can be set like this: it can move forward as spine, forces tissue separately.In arriving the process of destination organization, this will be for will to drop to minimum be favourable owing to passing through possible injury that other organizational structuries cause.For the location in destination organization, preferably can on electrode, apply a high frequency cutting current.Can reduce the d/d danger of cancerous cell meeting when the implanted tumor of electrode like this.Further, owing to do not bear any mechanical pulling force, electrode can be accurately positioned.Electrode one puts in place, and conductive liquid (as Ringer's solution) just press among Fig. 2 the direction shown in the arrow by supply pipe 20, in this process, adjusting pressure so that therapeutic electrode 10 (its extensile surface-element 11 just) expanded.Now, in order to solidify tumor from inside to outside, excitation high frequency generator 2 enters the tissue of being treated and makes tissue devitalization thereby coagulating current flows through liquid.Because the conductive liquid supply that obtains continuing is also gushed out from extensible surface-element 11, therefore guarantee between the extensible surface-element 11 and the tissue of receiving treatment, can occur liquid film (or cushion pad) constantly.On the one hand, this liquid is used to conduct high frequency electric; On the other hand, it is gone back the surface of cools tissue and prevents it and therapeutic electrode 10 adhesions.Surface-element 11 is expansion gradually in the process of solidifying, thereby (as mentioned above) follows the tissue in the treatment.
In the above-mentioned embodiment of the invention, high frequency electric is provided in one pole constitutes.Therefore, ground electrode N is received patient on one's body with as antielectrode.The difference of the embodiment of the invention shown in Figure 3 and embodiment shown in Figure 2 is that this equipment has dipolar configuration on the whole.For this reason, provide two therapeutic electrodes 10,10 ', it correspondingly has the extensible surface-element similar to the formation of Fig. 2 11,11 ' (co-axial).Two therapeutic electrodes 10,10 ' and extensible surface-element 11,11 ' the basis on, so have two supply pipes 20,20 ' and two the power supply utmost points 30,31, so inner space 13,13 ' can be in independently of one another under the different pressure, thus extensible surface-element 11,11 ' can be expanded to different degree.
The difference of embodiment shown in Figure 4 and those above-mentioned embodiment is that the inner space 13 of therapeutic electrode 10 is surrounded by the auxiliary main body 14 of elastic extensible three-dimensional, and this main body is waterproof fully.As shown in Figure 5, extensible surface-element 11 is formed by a plurality of layers, comprises that conductive liquid moves along surface direction by this internal layer via the internal layer 15 of conduit 20 ' confession stream, and the flow resistance on this direction is less relatively.In its outside, therapeutic electrode 10 has basically along perpendicular to the direction guiding liquids on surface mobile outer 16.Between the internal layer 15 and outer 16 is sealing coat 17, and it has the bigger flow resistance of relative internal layer 15, but still allows liquid to enter outer 16 by internal layer 15.In the embodiment of the invention herein, this sealing coat 17 also is simultaneously a conductive layer that electrically contacts with the power supply utmost point 30.Therefore, in this formation, therapeutic electrode 10 and extensible surface-element 11 can be expanded by the auxiliary main body 14 of three-dimensional, and, be not only liquid herein, gas also can be used for producing expansion.So no matter expansion state how, conductive liquid can both obtain supply and be evenly distributed on the internal layer 15.The outburst amount of liquid then depends on the pressure of supplying conductive liquid uniquely, thereby is relatively independent of the expansion state of therapeutic electrode 10.
In the present embodiment, also additionally provide suction pipe 22, it has suction inlet 23 near therapeutic electrode 10 places.By this suction pipe 22, excessive conductive liquid can be sucked away.
By above description, described obviously technical characterictic can also reconfigure in other various embodiment.For example, can have suction pipe among all embodiment of the present invention.Similarly, the also auxiliary main body 14 of applying three-dimensional in the embodiment shown in Figure 2.
Should indicatedly be that no matter all above-mentioned parts are one or combination in any, details shown in the drawings particularly, all are very important for the present invention herein.It is made various modifications is very normal to those skilled in the art.
Claims (17)
1. equipment that is used for the interstitial coagulation of tissue, has at least one electrode, (10), can be transferred in the tissue via this electrode HF coagulation current, wherein, described electrode, (10) be constructed to be expanded to the three-diemsnional electrode main body of different expansion states, perhaps be attached to the auxiliary main body of the three-dimensional that can be expanded to different expansion states, (14) on, therefore along with three-diemsnional electrode main body or three-dimensional auxiliary main body, continuing or progressively expansion (14), described electrode, (10) can and organize electrically contacting of remaining unchanged in the process of solidifying
Wherein, also comprise a control device (3), be used to control the expansion state of described three-diemsnional electrode main body or three-dimensional auxiliary main body (14),
Wherein, also comprise the measured value transducer (4) related, be used to detect a plurality of parameters that the degree of depth is solidified in indication with control device (3),
Wherein, it is controlled on the basis of the parameter that records that described control device (3) is designed to make the expansion state of described three-diemsnional electrode main body or three-dimensional auxiliary main body (14).
2. equipment according to claim 1 is characterized in that, described control device (3) is used to rely on coagulating current to control the expansion state of described three-diemsnional electrode main body or three-dimensional auxiliary main body (14).
3. equipment according to claim 1 is characterized in that, described control device (3) is set up and is configured to make the electric current density of the coagulating current between described electrode (10) and the tissue to regulate and can realize.
4. equipment according to claim 3 is characterized in that, described control device (3) is to design like this: described electric current density expansion state relatively is conditioned independently.
5. equipment according to claim 1 is characterized in that, also comprises measuring device (4), is used to detect the expansion state of described three-diemsnional electrode main body or three-dimensional auxiliary main body (14).
6. according to any described equipment of claim 1 to 5, it is characterized in that described electrode (10) has to the small part liquid impermeable and can contact with the part of tissue; One liquid supplying apparatus (20), by this device, conductive liquid can be delivered to described electrode (10); One electric supply installation (30,31) is used for by this way HF coagulation current being passed to described electrode (10): the high-frequency treatment electric current can be transferred to the liquid that passes through described electrode (10).
7. equipment according to claim 6, it is characterized in that, described electrode (10) comprises an elastic extensible or extensible surface-element (11), its inboard, just with organize an opposite side to be provided with an inner space (13) that can be applied in intrinsic pressure, thereby can make described surface-element (11) obtain expansion by increasing intrinsic pressure.
8. equipment according to claim 7 is characterized in that, described surface-element (11) is a ring-type or spherical.
9. equipment according to claim 6 is characterized in that, described electrode (10,10 ') is constructed to the shape of balloon catheter.
10. according to claim 7 or 8 described equipment, it is characterized in that described inner space (13) can filled conductive liquid.
11. equipment according to claim 6 is characterized in that, described conductive liquid comprises the material that changes conductive liquid viscosity.
12. the equipment according to claim 11 is characterized in that, the material of described change conductive liquid viscosity is polyvinylpyrrolidone (PVP) or surfactant.
13. equipment according to claim 6 is characterized in that, described electrode (10,10 ') comprises a thin film, felt material or fabric, and is preferably made by the heat stability material.
14. the equipment according to claim 13 is characterized in that, described heat stable material is the tetrafluoroethene material.
15., it is characterized in that described inner space (13) comprise that described distensible three-dimensional assists main body (14), with described conductive liquid hydraulic isolation according to claim 7 or 8 described equipment; Described surface-element (11) preferably has multi-ply construction, thereby the direction transmission surfacewise of the liquid in internal layer (15), and the liquid in outer (16) can be along perpendicular to this surperficial direction transmission, and preferably is provided with one has than the sealing coat (17) of flow resistance greatly between described internal layer (15) and outer (16).
16. equipment according to claim 6 is characterized in that, comprises that one is used to siphon away the aspirator (22,23) of excess liq.
17. equipment according to claim 6 is characterized in that, comprises that one can apply the electrode (20) of cutting current thereon.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004009206.0 | 2004-02-25 | ||
| DE102004009206 | 2004-02-25 | ||
| DE102004012813.8 | 2004-03-16 |
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| Publication Number | Publication Date |
|---|---|
| CN1921806A CN1921806A (en) | 2007-02-28 |
| CN100493468C true CN100493468C (en) | 2009-06-03 |
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| CNB2005800060887A Expired - Fee Related CN100493468C (en) | 2004-02-25 | 2005-02-25 | Device for the interstitial space coagulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009420A (en) * | 2012-10-26 | 2018-12-18 | 韦伯斯特生物官能(以色列)有限公司 | Flushing type ablation catheter with deformable head |
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| US6475213B1 (en) * | 1996-01-19 | 2002-11-05 | Ep Technologies, Inc. | Method of ablating body tissue |
| CN1220590A (en) * | 1996-04-12 | 1999-06-23 | 诺瓦塞普特 | Moisture transfer system for contact electrocoagulation |
| US20030130572A1 (en) * | 1999-11-22 | 2003-07-10 | Phan Huy D. | Apparatus for mapping and coagulating soft tissue in or around body orifices |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109009420A (en) * | 2012-10-26 | 2018-12-18 | 韦伯斯特生物官能(以色列)有限公司 | Flushing type ablation catheter with deformable head |
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| CN1921806A (en) | 2007-02-28 |
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