CN206390989U - Radio frequency ablation electrode device - Google Patents
Radio frequency ablation electrode device Download PDFInfo
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- CN206390989U CN206390989U CN201621018489.6U CN201621018489U CN206390989U CN 206390989 U CN206390989 U CN 206390989U CN 201621018489 U CN201621018489 U CN 201621018489U CN 206390989 U CN206390989 U CN 206390989U
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Abstract
The utility model is related to a kind of radio frequency ablation electrode device, including puncture needle, middle probe, first electrode, second electrode and handle；The puncture needle is fixed on handle, and the middle probe is arranged on the inner chamber of puncture needle, and can be moved along the inner chamber of puncture needle with respect to puncture needle；The first electrode is fixed on the distal end of middle probe, and the second electrode is fixed on the near-end of middle probe；The first electrode insulate with the second electrode；Voltage difference is formed between the first electrode and the second electrode, the first electrode acts on tumor tissues with the second electrode；Current loop is formed between the first electrode, second electrode and tumor tissues；The first electrode is identical with the working current density of second electrode.Solving RF energy consumption in the radio frequency ablation electrode device course of work, greatly, RF energy can be accumulated in human normal tissue, cause patient body uncomfortable, and cause patient the problem of through meeting persistent fever in RF ablation postoperative several weeks.
Description
Technical field
The utility model belongs to technical field of medical instruments, more particularly to a kind of radio frequency ablation electrode device.
Background technology
Radiofrequency ablation therapy (radiofrequency ablation, RFA) be using radio-frequency current excite in tissue from
Son vibrates at a high speed mutually collision, rubbed and producing hyperpyrexia controls tumor tissue cell, tissue dewatering formation locality coagulation necrosis
Treat a kind of physical therapy of tumour.
Radiofrequency ablation therapy tumour additionally depends on the biological characteristics of tumor tissues itself.Tumor tissues are due in dissection group
The defect on learning is knitted, there is blood supply insufficiency, anoxic is warmed up partially, the features such as thermo-labile, theoretical base is provided for radiofrequency ablation therapy
Plinth.Tumor tissues can not radiate after absorbing heat energy, and internal temperature rise can exceed 5~9 DEG C of health tissues, sometimes even up to 10
~11 DEG C, and maintain the long period.RF energy to the selectively acting of carcinoma tissue, can reach killing cancerous tissue and
The purpose of normal structure is not damaged.RF energy can also change near tumor cells environment acidity, reduce pH value, strengthen lyase
Body enzymatic activity, accelerates destruction of the lysosome to malignant cell.RF energy synthesizes vigorous tumour cell to DNA and more broken
Bad power, because DNA synthesizes the phase to temperature sensitivity.It is not only present between cancer cell and normal structure, embryo and maternal tissue, bone
Matter or calculus and soft tissue, all in the presence of the otherness to RF energy sensitiveness.Different biological tissues produce different biology
Effect, this is radiofrequency ablation therapy liver cancer, breast cancer, and the entity tumor such as malignant bone tumor provides prerequisite.
In view of the consideration of minimally invasive aspect factor, the volume of electrode needle electrode is restricted, pencil electrode in puncture needle
Space between the limited amount of electrode needle, electrode needle is larger, however, pressing 1/ with the increase of distance in the tissue according to electric current
Decay law [the J=1/4 π r of 2r mode2(J is current strength；I is current strength；R is distance)], most radio frequency electricals
Stream is just completely converted into heat energy in the tissue of electrode 1-2mm narrow ranges, therefore causes local current densities too high, from
And cause too high local tissue temperature, carbonization and vaporize, the conduction of radio-frequency current is blocked, prevents tumor focus from effectively melting,
Therefore need to supplement ablation repeatedly in surgical procedure, add operation technique difficulty and operating time.
Publication date is on November 23rd, 2011, Application No. 201120079822.5, entitled " liver neoplasm treatment tower
The Chinese utility model patent of formula multilayer probe radio frequency ablation electrode device ", discloses a kind of radio frequency ablation electrode device, and this is penetrated
Frequency ablation electrode assemblies use the probe structure of multilayer-tower, and the effect of the probe structure of the multilayer-tower is to provide bigger spy
Pin opens scope, and the contact of depth is carried out with tumour.But, because RF ablation needs to form current loop, penetrated using this
Frequency ablating electrode also needs to set specific ground electrode outside human body skin, and RF energy is in radio-frequency ablation electrode-human body-ground electricity
Current loop is formed between pole.The shortcoming of this device is the in larger distance of radio-frequency ablation electrode and ground electrode, and radio-frequency current
Need by human normal tissue, RF energy consumption is big, and RF energy can be accumulated in human normal tissue, cause patient's body
Body is uncomfortable, and can cause patient's persistent fever within several weeks after radio-frequency ablation procedure.
The content of the invention
In view of the shortcomings of the prior art, the utility model provides a kind of radio frequency ablation electrode device, is disappeared with solving radio frequency
Melting RF energy consumption in the electrode assembly course of work, greatly, RF energy can be accumulated in human normal tissue, cause patient's body
The problem of body is uncomfortable.
The purpose of this utility model is realized by following technical scheme：A kind of radio frequency ablation electrode device, including
Puncture needle, middle probe, first electrode, second electrode and handle；The puncture needle is fixed on handle, and the middle probe is set
Put in the inner chamber of puncture needle, and can be moved along the inner chamber of puncture needle with respect to puncture needle；During the first electrode is fixed on
Between probe distal end, the second electrode is fixed on the near-end of middle probe；The first electrode insulate with the second electrode；
Voltage difference is formed between the first electrode and the second electrode, the first electrode acts on human body with the second electrode
Tumor tissues；Current loop is formed between the first electrode, second electrode and body tumor tissue.Radio frequency of the present utility model
Ablation electrode assemblies make radio-frequency current be conducted between first electrode, second electrode and human lesion tissue, and radio-frequency current is not required to
To pass through human normal tissue, reduce radio-frequency current conduction distance, and then reduce RF energy consumption, it is to avoid radio frequency energy
Amount is accumulated in human normal tissue, improves the comfort level of patient.
Further, first electrode described in the utility model is identical with the working current density of second electrode, so as to reduce
That the heat waste of first electrode and second electrode operationally ruins effect is poor, it is to avoid because first electrode and second electrode disappear in radio frequency
Because current density is not waited and causes electrode bundle overheat and another electrode bundle temperature is too low, influence operation during melting
The problem of effect.
Described current density refers to the size of current in the per surface area of first electrode or second electrode.
Further, first electrode described in the utility model has first surface product, and the second electrode has the second table
Area；The first surface product is equal with second surface product.
The first surface product, which refers to first electrode, can produce the surface area that heat waste ruins effect part, the second surface product
The surface area that heat waste ruins effect part can be produced by referring to second electrode, and the first surface product is equal with second surface product to be
The difference for referring to first surface product and second surface product is less than ± 3%.
Further, the first electrode includes first electrode pin, and the second electrode includes second electrode pin, described the
The material of one electrode needle or the second electrode pin is good conductor, and the good conductor is selected from metal or graphene.
The metal is selected from least one of stainless steel, silver, nickel alloy, titanium alloy or Nitinol.
Further, first electrode described in the utility model connects with middle probe tie point and second electrode with middle probe
Insulating element is provided between contact, the insulating element is insulated from each other by the first electrode and second electrode.
Insulating element described in the utility model includes insulation tube and insulation cushion rubber, and the insulation tube is in the middle probe
Extension, the insulating cement circuit covering is in the outside of the insulation cushion rubber and exposes from middle probe wall, the insulating element
It is overall that the first electrode and second electrode is insulated from each other and form the positive pole and negative pole of the radio frequency ablation electrode device, institute
State and cable-through hole is provided with insulation tube, the insulated conductor of the negative or positive electrode of the radio frequency ablation electrode device passes through cable-through hole and the
One electrode is connected.
The distal end of middle probe described in the utility model refers to from insulation cushion rubber edge to the part of middle probe end, institute
The near-end for stating middle probe refers to from insulation cushion rubber edge to the part close to handle.
Further, the first electrode and the distance of middle probe tie point to second electrode and middle probe tie point
For 0~5cm, preferably 0cm, 1cm, 2cm, 3cm, 4cm or 5cm；When first electrode and middle probe tie point to second electrode
When distance with middle probe tie point is 0, refer to that first electrode is arranged on the inner side of second electrode, first electrode and the second electricity
Insulating element is provided between pole.
Further, in the utility model preferred embodiment, the bending direction and second after the first electrode pin expansion
Bending direction after electrode needle expansion is identical, in radiofrequency ablation procedures, the RF ablation efficiency phase of the RF ablation device
To the increase of individual layer RF ablation device at double, operating time is shortened.
Human lesion tissue described in the utility model is preferably tumour；The tumour is preferably lung neoplasm, liver tumour, first shape
Adenoncus knurl or tumor of breast.
In the utility model other preferred embodiments, bending direction and second electrode after the first electrode pin expansion
Pin expansion after bending direction on the contrary, carry out tumour radio-frequency ablation procedure when, preferentially to the utility model RF ablation device institute
The periphery of the tumor tissues of parcel carries out heat waste and ruined, to cut off the nutrient supply of tumour nucleus, and then kill tumour cell,
And effectively can remove remaining tumour cell in human body by human activin immunologic mechanism.
Further, the shape of first electrode or second electrode described in the utility model selected from umbrella, claw type, it is horn-like in
At least one.
Further, the cross section of the electrode needle of first electrode and second electrode described in the utility model be selected from quadrangle,
At least one of circular, ellipse.
It is preferred that, the cross section of the electrode needle of the first electrode and second electrode is selected from isosceles trapezoid, described first
The electrode needle of electrode and the electrode needle of second electrode are arranged in order using the axle center of puncture needle as axle, are enclosed around axle arrangement 1~2.
The quantity of the electrode needle of first electrode described in the utility model is 8~16, preferably 8, more preferably 16
It is individual；The quantity of the electrode needle of the second electrode is 8~16, more preferably preferably 8,16.
The utility model is preferred, and electrode needle is designed to that cross section is the structure of isosceles trapezoid, and is arranged in order around axle, excellent
8~16 electrode needles of gather row, improve the space availability ratio inside puncture needle, add the number of the arrangement of electrode needle, make electricity
Pole needle distal is smaller than 1cm, when carrying out radio-frequency ablation procedure, is heated evenly tumor tissues, it is to avoid local current is close
Spend high and cause too high local tissue temperature, carbonization and gasify, block the conduction of radio-frequency current, solve local tumor focus
The problem of can not effectively melting, and improve heat waste and ruin efficiency, reduce heat waste and ruin omissions, reduce the number of times that supplemental heat is damaged,
The sense of discomfort of patient is alleviated, operating efficiency is improved, operating time is shortened.
Further, the electrode needle of first electrode and second electrode described in the utility model is hollow structure, described the
The hollow intracavitary of the electrode needle of one electrode and second electrode is provided with temperature thermocouple, and the temperature thermocouple energy Real-time Feedback is abutted
Temperature change in 0~1cm of electrode needle regions, to realize that heat waste ruins the accurate monitoring and control of temperature.
Compared with prior art, the beneficial effects of the utility model are：The first electrode is fixed on middle probe
Distally, the second electrode is fixed on the near-end of middle probe；The first electrode insulate with the second electrode；Described first
Electrode loads first voltage, and the second electrode loads second voltage, and the first electrode acts on people with the second electrode
Body is loaded, and the human body load is human body pathological tissues；Formed between the first electrode, second electrode and human lesion tissue
Current loop, radio frequency ablation electrode device of the present utility model makes radio-frequency current in first electrode, second electrode and human lesion
Conducted between tissue, radio-frequency current needs not move through human normal tissue, reduce radio-frequency current conduction distance, and then reduce
RF energy is consumed, it is to avoid RF energy is accumulated in human normal tissue, improves the comfort level of patient.
Further, first electrode described in the utility model is identical with the current density of the second electrode, reduces
That the heat waste of one electrode and second electrode operationally ruins effect is poor, it is to avoid because first electrode and second electrode are in RF ablation
During because current density is not waited and causes electrode bundle overheat and another electrode bundle temperature is too low, influence operation effect
The problem of fruit.
First electrode described in the utility model and middle probe tie point to second electrode and centre probe tie point away from
From for 0~5cm, preferably 0cm, 1cm, 2cm, 3cm, 4cm or 5cm；The utility model can provide difference according to tumor size
The radio frequency ablation electrode device of model, makes the radio-frequency current between first electrode and second electrode conduct distance and adapts to the big of tumour
It is small, it is ensured that radio-frequency current conducts inside tumor tissues, it is to avoid human normal tissue absorbs excessive RF energy, and causes
The problem of patient body is uncomfortable.
Further, the electrode needle in the utility model is designed to the structure that cross section is isosceles trapezoid, is arranged successively around axle
Row, improve the space availability ratio inside puncture needle, add the number of the arrangement of electrode needle, make being smaller than for electrode needle distal
1cm, when carrying out radio-frequency ablation procedure, is heated evenly tumor tissues, improves heat waste and ruin efficiency, and can reduce heat waste
Omission is ruined, the number of times of supplemental heat damage is reduced, alleviates the sense of discomfort of patient, improve operating efficiency, when shortening operation
Between.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment, one will be made to the required accompanying drawing used in embodiment below
Simply introduce, it should be apparent that, drawings in the following description are some embodiments of the present utility model, common for this area
For technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram in embodiment one during radio frequency ablation electrode device off working state；
Signal when Fig. 2 is deployed for the first electrode and second electrode of radio frequency ablation electrode device in embodiment one with umbrella
Figure；
Fig. 3 is the first electrode and second electrode of radio frequency ablation electrode device in embodiment one with showing during horn-like expansion
It is intended to；
Fig. 4 is cuing open that the first electrode and second electrode of radio frequency ablation electrode device in embodiment one are arranged in puncture needle
Face figure；
Fig. 5 is the schematic diagram of radio frequency ablation electrode device disclosed in embodiment two；
Fig. 6 is the schematic diagram of radio frequency ablation electrode device disclosed in embodiment three；
Fig. 7 is the schematic diagram of radio frequency ablation electrode device disclosed in example IV；
Fig. 8 is the schematic diagram of radio frequency ablation electrode device disclosed in embodiment five；
Fig. 9 is the profile of the puncture needle of radio frequency ablation electrode device disclosed in embodiment two or embodiment three；
Figure 10 is the profile of the puncture needle of radio frequency ablation electrode device disclosed in example IV and embodiment five；
Figure 11 is a kind of profile of the puncture needle of preferred scheme of radio frequency ablation electrode device in embodiment six；
Figure 12 is the profile of the puncture needle of another preferred scheme of radio frequency ablation electrode device in embodiment six；
Figure 13 is the profile of insulating element described in the utility model embodiment；
Figure 14 carries out schematic diagram during liver tumour RF ablation for radio frequency ablation electrode device in the prior art；
Figure 15 carries out schematic diagram during liver tumour RF ablation for the radio frequency ablation electrode device of the utility model embodiment.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all belongs to
The scope protected in the utility model.
Embodiment one
With reference to Fig. 1~4, a kind of radio frequency ablation electrode device, including puncture needle 100, middle probe are present embodiments provided
200th, first electrode 301, second electrode 302 and handle 500；The puncture needle 100 is fixed on handle 500, the middle spy
Pin 200 is arranged on the inner chamber of puncture needle 100, and can be moved along the inner chamber of puncture needle 100 with respect to puncture needle 100；It is described
First electrode 301 is fixed on the distal end of middle probe 200, and the second electrode 302 is fixed on the near-end of middle probe 200；Institute
First electrode 301 is stated to insulate with the second electrode 302；The first electrode 301 loads first voltage, the second electrode
302 loading second voltages, the first electrode 301 acts on human body load with the second electrode 302, and the human body load is
Human lesion tissue；Current loop is formed between the first electrode 301, second electrode 302 and human lesion tissue.This implementation
The radio frequency ablation electrode device of example makes radio-frequency current be conducted between first electrode, second electrode and human lesion tissue, radio frequency
Electric current needs not move through human normal tissue, reduces RF energy consumption, improves the comfort level of patient.
First electrode 301 in the present embodiment is identical with the current density of second electrode 302, so as to reduce first electrode
301 and the heat waste of second electrode 302 operationally to ruin effect poor, it is to avoid because first electrode 301 and second electrode 302 are being penetrated
Because current density is not waited and causes electrode bundle overheat and another electrode bundle temperature is too low, influence in frequency ablation procedure
The problem of surgical effect.
In the present embodiment, first electrode 301 connects with the middle tie point of probe 200 to second electrode 302 with middle probe 200
The distance of contact is 0, specifically, the near-end of the first electrode 301 is fixed on middle probe 200, fixed form is welding,
First electrode 301 is consolidated with being provided with insulating element 201, the near-end of the second electrode 302 on the outside of the middle tie point of probe 200
The outside of insulating element 201 is scheduled on, fixed form is welding or snaps connection.The first electrode pin and second electrode pin of the present embodiment
The distance of needle point be reduced to below 1cm, the radio frequency ablation electrode device of the present embodiment makes radio-frequency current in first electrode, second
Conducted between electrode and human lesion tissue, the conduction distance of radio-frequency current is reduced to 1cm from 10~20cm of prior art
Hereinafter, the utilization rate of RF energy is greatly improved, RF ablation efficiency is improved and reduces the sense of discomfort of patient.
The first electrode 301 of the present embodiment after the expansion of second electrode 302 with being shaped as umbrella or horn-like, and electrode needle
Bending direction it is identical.
In the present embodiment, four sides of the cross section of the electrode needle constitute isosceles trapezoid, four of the isosceles trapezoid
Angle is provided with chamfering, specifically, the equal length of the upper bottom of the isosceles trapezoid and two waists, and the length at the upper bottom is equal to
The 1/2 of length of going to the bottom.
As shown in figure 4, in the present embodiment, the electrode needle of described first electrode 301 by axle of the axle center of puncture needle 100 according to
Secondary arrangement, the top of the isosceles trapezoid is arranged in order the equilateral octagon of composition, is enclosed around axle arrangement 1, the second electrode 302
Electrode needle, which is arranged between the outside of first electrode 301 and first electrode 301 and second electrode 302, is provided with insulating element 201.
In the present embodiment, described first electrode 301 and the quantity of the electrode needle of second electrode 302 are 8.
In the present embodiment, electrode needle is designed to that cross section is the structure of isosceles trapezoid, and is arranged in order around axle, first electrode
301 and second electrode 302 altogether comprising 16 with electrode needle, improve the space availability ratio inside puncture needle 100, add electrode needle
Number of the arrangement, make adjacent electrode needle distal is smaller than 1cm, carry out radio-frequency ablation procedure when, make tumor tissues be heated
Uniformly, improve heat waste and ruin efficiency, and heat waste can be reduced and ruin omission, reduce the number of times of supplemental heat damage, alleviate disease
The sense of discomfort of people, improves operating efficiency, shortens operating time.
Embodiment two
As shown in figure 5, first electrode 301 described in the present embodiment with the middle tie point of probe 200 to second electrode 302 with
Between the distance of the tie point of probe 200 be 3~5cm, the first electrode is fixed on the distal end of middle probe, and the second electrode is consolidated
The near-end of middle probe is scheduled on, first electrode 301 connects with the middle tie point of probe 200 and second electrode 302 with middle probe 200
Insulating element 201 is provided between contact, the insulating element 201 is exhausted each other by the first electrode 301 and second electrode 302
Edge；The first electrode 301 loads first voltage, and the second electrode 302 loads second voltage, the first electrode 301 with
The second electrode 302 acts on human body load, and the human body load is human body pathological tissues；The first electrode 301, second
Current loop is formed between electrode 302 and human lesion tissue.The radio frequency ablation electrode device of the present embodiment makes radio-frequency current exist
Conducted between first electrode, second electrode and human lesion tissue, the radio frequency ablation electrode device described in the present embodiment is worked
Radio-frequency current in journey needs not move through human normal tissue, reduces RF energy consumption, improves the comfort level of patient, and
The problem of patient's postoperative persistent fever can be prevented effectively from.
First electrode 301 described in the present embodiment is accumulated with first surface, and the second electrode 302 is accumulated with second surface；
The first surface product is equal with second surface product.First surface product, which refers to first electrode 301 and can produce heat waste, ruins
The surface area of effect part, the second surface product, which refers to second electrode 302, can produce the surface area that heat waste ruins effect part, institute
State the first surface product difference for referring to that first surface product and second surface are accumulated equal with second surface product and be less than ± 3%.
First electrode 301 described in the present embodiment includes first electrode pin, and the second electrode 302 includes second electrode pin,
The material of the first electrode pin or the second electrode pin is good conductor, and the good conductor is selected from stainless steel.
First electrode 301 described in the present embodiment and middle probe tie point and second electrode 302 and middle probe tie point
Between be provided with insulating element 201, the insulating element 201 is insulated from each other by the first electrode 301 and second electrode 302.
With reference to Figure 13, insulating element described in the present embodiment includes insulation tube 221 and insulation cushion rubber 211, the insulation tube 221
Extend in the middle probe 200, the insulation cushion rubber 211 is covered in the outside of the insulation tube and naked from middle probe wall
Expose, the insulating element 201 is overall insulated from each other and penetrate described in being formed by the first electrode 301 and second electrode 302
Cable-through hole, the positive pole of the radio frequency ablation electrode device are provided with the positive pole and negative pole of frequency ablation electrode assemblies, the insulation tube
Or the insulated conductor of negative pole is connected by cable-through hole with first electrode.
In the present embodiment, the shape after first electrode 301 and second electrode 302 expansion is umbrella shape, and after expansion
The bending direction of electrode needle is identical, and the present embodiment keeps first electrode 301 identical with the surface area of second electrode 302, to avoid
Larger current density is produced between first electrode 301 and second electrode 302 poor, cause a pole to overheat, pole supercooling influences hand
Art effect；In addition, this example is double-decker, RF ablation efficiency is doubled with respect to single layer structure.
As shown in figure 9, in the present embodiment, the cross section of the electrode needle of the first electrode 301 and second electrode 302 for etc.
Waist is trapezoidal, and four angles of the isosceles trapezoid are provided with chamfering, specifically, the length of the upper bottom of the isosceles trapezoid and two waists
It is equal, and the length at the upper bottom is equal to the 1/2 of bottom length, the electrode needle and second electrode 302 of described first electrode 301
Electrode needle be arranged in order using the axle center of puncture needle 100 as axle, around axle arrangement 1 enclose.
The quantity of the electrode needle of first electrode 301 and second electrode 302 described in the present embodiment is 8.
Electrode needle described in the present embodiment is designed to that cross section is the structure of isosceles trapezoid, and is arranged in order around axle, improves
Space availability ratio inside puncture needle 100, adds the number of the arrangement of electrode needle, make electrode needle distal is smaller than 1cm,
When carrying out radio-frequency ablation procedure, tumor tissues are heated evenly, heat waste is improved and ruins efficiency, and heat waste can be reduced and ruin something lost
Leakage, reduces the number of times of supplemental heat damage, alleviates the sense of discomfort of patient, improve operating efficiency, shorten operating time.
Embodiment three
With reference to Fig. 6, the present embodiment and the difference of embodiment two are, the first electrode 301 and second electrode of the present embodiment
Being shaped as after 302 expansion is horn-like, and the electrode needle of first electrode 301 and second electrode 302 is hollow acicular texture, this implementation
Hollow intracavitary in the middle cavity of the electrode needle of example and middle probe 200 is equipped with temperature thermocouple, so as to Real-time Feedback heat waste
Regional temperature is ruined, and RF ablation electromagnetic frequency is adjusted according to temperature feedback situation in time, the accurate of RF ablation temperature is realized
Control.
Example IV
With reference to Fig. 7, the RF ablation device of the present embodiment and the difference of embodiment two are, the first electrode of the present embodiment
It is umbrella-shaped structure after 301 expansion, is horn-like structure after the expansion of second electrode 302, first electrode 301 and second electrode 302 are opened up
Tumor tissues can be wrapped up after opening, the periphery progress heat waste to tumor tissues is ruined, and cuts off tumour nucleus tumour cell
Nutrient supply, and can effective human activin immunologic mechanism, the tumour cell participated in is killed by human immunocyte.
The radio frequency ablation electrode device of the present embodiment is applied to the larger tumor tissues of volume, thus first electrode 301 with
The distance of the middle tie point of probe 200 to second electrode 302 and the middle tie point of probe 200 is 3~5cm, in order to strengthen electrode
The puncture dynamics of pin, with reference to Figure 10, the cross section of first electrode 301 and the electrode needle of second electrode 302 in the present embodiment is equal
Be designed as isosceles trapezoidal structure, four angles of the isosceles trapezoid are provided with chamfering, specifically, the upper bottom of the isosceles trapezoid and
The equal length of two waists, and the length at the upper bottom is equal to the 1/2 of bottom length, the electrode needle of described first electrode 301
It is arranged in order, is enclosed around axle arrangement 2, described in the present embodiment as axle using the axle center of puncture needle 100 with the electrode needle of second electrode 302
The quantity of the electrode needle of first electrode 301 and second electrode 302 is 16.
Embodiment improves the space availability ratio inside puncture needle 100, the number of the arrangement of electrode needle is further increased,
Make the 1cm that is smaller than of electrode needle distal, and the scope of RF ablation is bigger, when carrying out radio-frequency ablation procedure, makes tumor group
Knit and be heated evenly, improve heat waste and ruin efficiency, and heat waste can be reduced and ruin omission, reduce the number of times of supplemental heat damage, subtract
The light sense of discomfort of patient, improves operating efficiency, shortens operating time.
Further, in the present embodiment, heat waste is carried out using the preferential periphery to tumor tissues of radio frequency ablation electrode device
Ruin, to cut off the nutrient supply of tumour nucleus, operating time is short, and effectively can kill residue by human activin immunologic mechanism
Tumour cell.On the other hand, the present embodiment is provided RF ablation device and method, it is to avoid RF ablation time is longer
Afterwards, the residue that heat waste is ruined can be attached to electrode wire surface, the problem of influence radio-frequency current conducts.
Embodiment five
With reference to Fig. 8, the RF ablation device of the present embodiment and the difference of example IV are, second electricity of the present embodiment
Pole 302 is claw-type structure after deploying, first electrode 301 deploy after be still umbrella-shaped structure, first electrode 301 and the in the present embodiment
The area that progress RF ablation heat waste is ruined after the expansion of two electrodes 302 is bigger, can wrap up higher volume of tumor tissues, right
The periphery of tumor tissues carries out heat waste and ruined, and cuts off the nutrient supply of tumour nucleus tumour cell, and can effective human activin
Immunologic mechanism, the tumour cell participated in is killed by human immunocyte.
Embodiment six
With reference to Figure 11 and Figure 12, the RF ablation device of the present embodiment be on the basis of example IV or embodiment five,
The electrode needle of the first electrode 301 or second electrode 302 is processed into hollow structure, the cross section of described middle cavity can be with
For circle, or it is quadrangle.The hollow intracavitary be provided with thermocouple, in radiofrequency ablation procedures monitor electrode needle and its
Carry out heat waste and ruin the temperature change in region, and RF ablation electromagnetic frequency is adjusted according to temperature feedback situation in time, realize radio frequency
Melt the accurate control of temperature.
In order to more clearly understand the technique effect of the utility model embodiment, Figure 14 and Figure 15 are respectively illustrated
RF ablation device in prior art and the utility model embodiment carries out schematic diagram during liver tumour radio-frequency ablation procedure.Figure
In 14,101 be the electrode needle of RF ablation device in the prior art, and 501 be the electrode hand of RF ablation device in the prior art
Handle, 600 be human body skin, and 700 be ground electrode, and 800 be the electric current line for flowing through human body；In Figure 15,800 be that the utility model is implemented
The electric current line of human body is flowed through during the radio frequency ablation electrode device work of example.It is can be seen that from Figure 14 and Figure 15 relative to existing skill
Art, when radio frequency ablation electrode device of the present utility model carries out radio-frequency ablation procedure, in the radio frequency ablation electrode device course of work
Radio-frequency current need not move through human normal tissue, considerably reduce radio-frequency current conduction distance, reduce RF energy
Consumption, it is to avoid RF energy is accumulated in human normal tissue, improves the comfort level of patient.
First electrode described in the utility model embodiment is connected with middle probe tie point to second electrode with middle probe
The distance of point is 0~5cm, with reference to Figure 15, and the utility model can provide the RF ablation electricity of different model according to tumor size
Pole device, makes the radio-frequency current between first electrode and second electrode conduct the size that distance adapts to tumour, it is ensured that radio-frequency current
Conducted inside tumor tissues, it is to avoid human normal tissue absorbs excessive RF energy, and cause patient body uncomfortable
Problem.
With reference to Figure 15, the working current density phase of first electrode described in the utility model embodiment and the second electrode
Together, reducing the heat waste of first electrode and second electrode operationally, to ruin effect poor, it is to avoid because first electrode and the second electricity
Pole is in radiofrequency ablation procedures because current density is not waited and causes an electrode bundle to overheat and another electrode bundle temperature mistake
It is low, the problem of influenceing surgical effect.
Those skilled in the art are supplied to the purpose described to the descriptions of various embodiments of the present utility model above.
It is that it is not intended to exhaustion or be not intended to the utility model is limited to single disclosed embodiment.As described above, this reality
It is will be apparent with new various replacements and change for above-mentioned technology one of ordinary skill in the art.Therefore, though
Some alternative embodiments so have been specifically discuss, but other embodiment will be apparent, or this area
Technical staff relatively easily draws.The utility model be intended to be included in that this had discussed it is of the present utility model it is all substitute,
Modification and change, and fall the other embodiment in the spirit and scope of above-mentioned application.
Although depicting the utility model by embodiment, it will be appreciated by the skilled addressee that the utility model has
Many deformations and change are without departing from spirit of the present utility model, it is desirable to which appended claim is including these deformations and change
Spirit of the present utility model is not departed from.
Claims (12)
1. a kind of radio frequency ablation electrode device, it is characterised in that：Including puncture needle, middle probe, first electrode, second electrode and
Handle；The puncture needle is fixed on handle, and the middle probe is arranged on the inner chamber of puncture needle, and can be along along puncture needle
Chamber is moved with respect to puncture needle；The first electrode is fixed on the distal end of middle probe, and the second electrode is fixed on centre
The near-end of probe；The first electrode insulate with the second electrode；Formed between the first electrode and the second electrode
Voltage difference, the first electrode acts on tumor tissues with the second electrode；The first electrode, second electrode and tumor group
Current loop is formed between knitting；The first electrode is identical with the working current density of second electrode.
2. radio frequency ablation electrode device according to claim 1, it is characterised in that the first electrode has first surface
Product, the second electrode has second surface product；The first surface product is equal with second surface product.
3. radio frequency ablation electrode device according to claim 2, it is characterised in that the first electrode connects with middle probe
Be provided with insulating element between contact and second electrode and middle probe tie point, the insulating element by the first electrode and
Second electrode is insulated from each other.
4. radio frequency ablation electrode device according to claim 3, it is characterised in that the insulating element include insulation tube and
Insulate cushion rubber, and the insulation tube extends in the middle probe, and the insulating cement circuit covering is in the outside of the insulation cushion rubber
And expose to come from middle probe wall, the insulating element is integrally insulated from each other and formed by the first electrode and second electrode
Cable-through hole, the radio frequency ablation electrode device are provided with the positive pole and negative pole of the radio frequency ablation electrode device, the insulation tube
The insulated conductor of negative or positive electrode be connected by cable-through hole with first electrode.
5. radio frequency ablation electrode device according to claim 4, it is characterised in that the first electrode connects with middle probe
The distance of contact to second electrode and middle probe tie point is 0~5cm.
6. radio frequency ablation electrode device according to claim 5, it is characterised in that curved after the first electrode pin expansion
Bending direction after Qu Fangxiang deploys with second electrode pin is identical.
7. radio frequency ablation electrode device according to claim 6, it is characterised in that curved after the first electrode pin expansion
Bending direction after Qu Fangxiang deploys with second electrode pin is opposite.
8. the radio frequency ablation electrode device according to any one of claim 6,7, it is characterised in that the first electrode or
The shape of second electrode is selected from least one of umbrella, claw type, horn-like.
9. radio frequency ablation electrode device according to claim 8, it is characterised in that the first electrode pin and described second
The cross section of electrode needle is selected from least one of quadrangle, circle, ellipse.
10. radio frequency ablation electrode device according to claim 9, it is characterised in that the first electrode pin and described
The cross section of two electrode needles is selected from isosceles trapezoid, described first electrode pin and the second electrode pin using the axle center of puncture needle as
Axle is arranged in order, and is enclosed around axle arrangement 1~2.
11. radio frequency ablation electrode device according to claim 10, it is characterised in that the quantity of described first electrode pin
For 8~16, the quantity of the second electrode pin is 8~16.
12. radio frequency ablation electrode device according to claim 11, it is characterised in that described first electrode pin and described
Second electrode pin is hollow structure, and the hollow intracavitary of the first electrode pin and the second electrode pin is provided with temperature thermocouple.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110338903A (en) * | 2019-08-07 | 2019-10-18 | 杭州睿笛生物科技有限公司 | A kind of puncture needle and electrode delivery device for leading electrode |
| WO2020088140A1 (en) * | 2017-11-28 | 2020-05-07 | 杭州诺诚医疗器械有限公司 | Ablation needle component and ablation system |
| CN111887983A (en) * | 2020-09-03 | 2020-11-06 | 张萍 | Probe radio frequency ablation electrode device for liver cancer treatment |
| US11013553B2 (en) | 2017-11-28 | 2021-05-25 | Hangzhou Nuo Cheng Medical Instrument Co., Ltd. | Treatment method for hypertrophic cardiomyopathy |
| CN116549097A (en) * | 2023-05-18 | 2023-08-08 | 浙江伽奈维医疗科技有限公司 | Conformal ablation assembly, ablation assembly for pancreatic tissue, and ablation system |
| CN117796895A (en) * | 2024-02-29 | 2024-04-02 | 浙江伽奈维医疗科技有限公司 | Steep pulse ablation catheter and equipment |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020088140A1 (en) * | 2017-11-28 | 2020-05-07 | 杭州诺诚医疗器械有限公司 | Ablation needle component and ablation system |
| US11013553B2 (en) | 2017-11-28 | 2021-05-25 | Hangzhou Nuo Cheng Medical Instrument Co., Ltd. | Treatment method for hypertrophic cardiomyopathy |
| CN110338903A (en) * | 2019-08-07 | 2019-10-18 | 杭州睿笛生物科技有限公司 | A kind of puncture needle and electrode delivery device for leading electrode |
| CN111887983A (en) * | 2020-09-03 | 2020-11-06 | 张萍 | Probe radio frequency ablation electrode device for liver cancer treatment |
| CN116549097A (en) * | 2023-05-18 | 2023-08-08 | 浙江伽奈维医疗科技有限公司 | Conformal ablation assembly, ablation assembly for pancreatic tissue, and ablation system |
| CN116549097B (en) * | 2023-05-18 | 2024-06-11 | 浙江伽奈维医疗科技有限公司 | Conformal ablation assembly, ablation assembly for pancreatic tissue, and ablation system |
| CN117796895A (en) * | 2024-02-29 | 2024-04-02 | 浙江伽奈维医疗科技有限公司 | Steep pulse ablation catheter and equipment |
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