CN208274614U - A kind of radio frequency ablation catheter and radio frequency ablation system - Google Patents

Abstract

The utility model provides a kind of radio frequency ablation catheter, including tip electrode, at least a pair of of signal extraction electrode, at least a pair of first conducting wire and the second conducting wire；Wherein, two signal extraction electrodes in each pair of signal extraction electrode are electrically connected with two first conducting wires in each pair of first conducting wire, each pair of signal extraction electrode is used for transmission the described first intracardiac signal for extracting the first intracardiac signal, each pair of first conducting wire；The tip electrode is electrically connected with second conducting wire, the tip electrode is alternatively used for transmitting RF energy or for extracting the second intracardiac signal, second conducting wire is alternatively used for transmitting RF energy or the second intracardiac signal, when tip electrode electric discharge, the extraction of intracardiac signal is independent of tip electrode, so the extraction of intracardiac signal is not easily susceptible to the interference of radiofrequency signal, the accuracy and reliability of the intracardiac signal of extraction is improved.The utility model provides a kind of radio frequency ablation system simultaneously.

Description

A kind of radio frequency ablation catheter and radio frequency ablation system

Technical field

The utility model relates to a kind of medical instruments field, in particular to a kind of radio frequency ablation catheter and RF ablation system System.

Background technique

Catheter ablation is under the monitoring of X-ray angiography machine, by puncturing under femoral vein, femoral artery or clavicle The blood vessels such as vein, radio frequency ablation catheter are partially installed in the chambers of the heart, then by radio frequency ablation catheter with the side of electrophysiologic study Formula, which determines, causes tachycardic abnormal structure (ablation target spot), is then discharged at abnormal structure by radio frequency ablation catheter The high-frequency current of 100KHZ~1.5MHZ makes abnormal structure by thermal energy to generate high temperature at abnormal structure (ablation target spot) Moisture evaporation, dry necrosis in the tissue at place, to reach therapeutic purposes.This therapeutic modality damages caused by tissue It is even, range is small, clear border, is easy to control.Specifically, catheter ablation is not temporary pre- compared with drug therapy Prevent or terminate tachycardic breaking-out, but disposably eradicate, no longer needs after successful surgery using antiarrhythmic drug；With Surgical operation is compared, it does not need out chest, does not need general anesthesia, and patient's pain is small, and operating method is easy.Therefore, conduit radio frequency disappears Melt art to be widely used in treating tachyarrhythmia.

Catheter ablation needs to extract intracardiac signal by radio frequency ablation catheter, to instruct patient to judge cardiac muscular tissue The case where, quickly determine ablation target spot, and by reading intracardiac signal judgement ablation terminal.Currently, radio frequency ablation catheter includes Tip electrode, at least one ring electrode, adjustable curved segment, main paragraph, control curved hand grip and buttock line cable, wherein the tip electrode, described Adjustable curved segment, the main paragraph, the control curved hand grip, the buttock line cable are sequentially connected and connect, and ring electrode is arranged in adjustable curved segment On.Buttock line cable other equipment matched with the radio frequency ablation catheter are connect.The tip electrode and ring of radio frequency ablation catheter Intracardiac signal is extracted in electrode cooperation, and the tip electrode is also used to transmit radiofrequency signal to cardiac muscular tissue, to carry out ablation.So And it has been found that the tip electrode of this radio frequency ablation catheter can interfere tip electrode to extract the heart while transmitting radiofrequency signal Interior signal, i.e., can not at serious also to cover true intracardiac signal, the case where causing patient to be unable to judge accurately cardiac muscular tissue Accurate judgement melts terminal, influences surgical result.

Utility model content

The purpose of this utility model is to provide a kind of radio frequency ablation catheters, have both been adopted with solving existing radio frequency ablation catheter Radiofrequency signal is transmitted with tip electrode, and tip electrode is used to extract intracardiac signal, keeps the extraction of intracardiac signal dry by radiofrequency signal The problem of disturbing.

In order to solve the above technical problems, the utility model provides a kind of radio frequency ablation catheter, including tip electrode, further include to Few a pair of signal extraction electrode, at least a pair of first conducting wire and the second conducting wire；Wherein, in each pair of signal extraction electrode Two signal extraction electrodes be electrically connected with two first conducting wires in each pair of first conducting wire, each pair of signal mentions Take electrode for extract the first intracardiac signal, each pair of first conducting wire is used for transmission the described first intracardiac signal；The head electricity Pole is electrically connected with second conducting wire, and the tip electrode is alternatively used for transmitting RF energy or intracardiac for extracting second Signal, second conducting wire are alternatively used for transmission RF energy or the second intracardiac signal.

Optionally, at least one electrode at least a pair of signal extraction electrode is nested electrode, the nested electricity Pole is sheathed on the tip electrode, filled with the first insulating layer the head is isolated between the nesting electrode and the tip electrode Electrode and the nested electrode.

Optionally, the tip electrode has an inner cavity, an outer wall and through the outer wall in communication with the inner cavity First through hole, first conducting wire pass through the inner cavity and the first through hole and are electrically connected with the nested electrode.

Optionally, the radio frequency ablation catheter further includes a pillar, and the pillar is located in the first through hole, and described Protective pipe sleeve is set to first conducting wire and passes through on the part of the first through hole.

Optionally, the nested electrode is ring electrode.

Optionally, at least one annular groove is offered on the outer surface of the outer wall, is set in each annular groove It is equipped with the ring electrode, and the outer surface of the ring electrode is not less than the outer surface of the outer wall.

Optionally, the interior intracavitary second insulating layer that is filled with of the tip electrode is to be isolated first conducting wire and described second Conducting wire.

Optionally, first insulating layer and second insulating layer are the glue of insulation insulation.

Optionally, the radio frequency ablation catheter includes two pairs of signal extraction electrodes, signal extraction described in one pair of them Electrode is point electrode.

Optionally, the radio frequency ablation catheter further includes adjustable curved segment, distal end and the tip electrode of the adjustable curved segment Connection, the point electrode are fastened in the adjustable curved segment.

Optionally, the adjustable curved segment in a tubular form, offers at least two second through-holes on the tube wall of the adjustable curved segment, The point electrode is provided in each second through-hole, each point electrode includes extracting the first intracardiac signal Head, bar portion and fixed part, the bar portion runs through second through-hole, and one end of the bar portion and the head are fixed to be connected It connects, the other end of the bar portion is fixedly connected with the fixed part, and the head is stuck in the outside of the tube wall, the fixation Portion is stuck in the inside of the tube wall.

Optionally, the fixed part is cone or rotary table, and the fixed part is connect with the other end of the bar portion One end is the bottom surface of cone, or is the biggish bottom surface of rotary table area.

The utility model additionally provides a kind of radio frequency ablation system comprising above-mentioned any radio frequency ablation catheter, the heart Electric signal monitoring device and radio-frequency power supply, when second conducting wire of the radio frequency ablation catheter and radio-frequency power supply disconnection, Second conducting wire is electrically connected with the electrocardiosignal monitoring device, when second conducting wire of the radio frequency ablation catheter with penetrate When frequency power is connected to, second conducting wire and the electrocardiosignal monitoring device are disconnected；First conducting wire always with the heart The electrical connection of electric signal monitoring device.

In radio frequency ablation catheter provided by the utility model and radio frequency ablation system, at least a pair of of signal extraction electrode is used In the first intracardiac signal of extraction, and pass through at least a pair of first the first intracardiac signal of wire transmission to electrocardiosignal monitoring device； In the case that tip electrode does not discharge, tip electrode can be connected with electrocardiosignal monitoring device, play and increase signal extraction Precision further clarifies the effect of lesion target position, and when tip electrode is connected to electric discharge with power supply, tip electrode is only used for penetrating Frequency energy, the second conducting wire is only used for transmitting RF energy, therefore the extraction and transmitting of intracardiac signal are not easily susceptible to RF energy Interference, improve the accuracy of intracardiac signal extraction and transmitting, judged in heart according to intracardiac signal convenient for operator Ablation target spot and ablation terminal, shorten operating time, improve the safety and validity of operation.

Detailed description of the invention

Fig. 1 a be the radio frequency ablation catheter of embodiment one can main view of curved segment when not being bent；

Fig. 1 b be the radio frequency ablation catheter of embodiment one can curved segment main view after bending；

Fig. 2 is the tip electrode of the radio frequency ablation catheter of embodiment one and the main view of partial adjustable curved segment；

Fig. 3 be radio frequency ablation catheter shown in Fig. 2 tip electrode and partial adjustable curved segment along line A-A cross-sectional view；

Fig. 4 is cross-sectional view of the tip electrode along line B-B of the radio frequency ablation catheter of embodiment illustrated in fig. 3 one；

Fig. 5 is the tip electrode of the radio frequency ablation catheter of embodiment two and a main view of partial adjustable curved segment；

Tip electrode that Fig. 6 is the radio frequency ablation catheter of embodiment two shown in fig. 5 and partial adjustable curved segment are along line C-C Cross-sectional view；

Tip electrode that Fig. 7 is the radio frequency ablation catheter of embodiment two shown in fig. 6 and partial adjustable curved segment are along line C-C The partial enlarged view of cross-sectional view；

Tip electrode that Fig. 8 is the radio frequency ablation catheter of embodiment two shown in fig. 6 and partial adjustable curved segment are along line D-D Cross-sectional view；

Fig. 9 is the tip electrode of the radio frequency ablation catheter in embodiment three and the main view of partial adjustable curved segment；

Figure 10 is the tip electrode of the radio frequency ablation catheter in example IV and the main view of partial adjustable curved segment.

Description of symbols:

100- radio frequency ablation catheter；110- tip electrode；The inner cavity 111-；112- outer wall；113- first through hole；

114- annular groove；The second conducting wire of 115-；120- ring electrode；The first conducting wire of 121-；122- pillar；

Curved segment that 130- is adjustable；131- tube wall；The second through-hole of 132-；140- main paragraph；150- controls curved hand grip；

151- turntable toggle；152- knob；160- buttock line cable；The first insulating layer of 171-；

172- second insulating layer；173- third insulating layer；180- point electrode；The head 181-；182- bar portion；

183- fixed part.

Specific embodiment

Below in conjunction with the drawings and specific embodiments to the utility model proposes a kind of radio frequency ablation catheter make further it is detailed It describes in detail bright.According to following explanation and claims, will be become apparent from feature the advantages of the utility model.It should be noted that attached Figure is all made of very simplified form and using non-accurate ratio, only to convenient, lucidly aid illustration is originally practical new The purpose of type embodiment.

Embodiment one

Fig. 1 a be the radio frequency ablation catheter of embodiment one can main view of curved segment when not being bent, Fig. 1 b is embodiment one Radio frequency ablation catheter can curved segment main view after bending, Fig. 2 is tip electrode and the part of the radio frequency ablation catheter of embodiment one Adjustable curved segment main view, tip electrode that Fig. 3 is radio frequency ablation catheter shown in Fig. 2 and partial adjustable curved segment are along line A-A Cross-sectional view, Fig. 4 is cross-sectional view of the tip electrode along line B-B of the radio frequency ablation catheter of embodiment illustrated in fig. 3 one.

Referring to figs. 1 to Fig. 4, radio frequency ablation catheter 100 includes 110, four ring electrodes 120 of tip electrode and adjustable curved segment 130.The distal end of the adjustable curved segment 130 is connect with the tip electrode 110.Two ring electrodes 120 are sheathed on the head electricity On pole 110, two ring electrodes 120 are sheathed in the adjustable curved segment 130.In the present invention, we will be sheathed on Ring electrode on tip electrode is known as nested electrode, therefore, in the present embodiment, with a pair of nested electrode 120 on tip electrode 110.

In the present embodiment, for ease of description, intracardiac signal is divided into the first intracardiac signal and the second intracardiac signal, the One intracardiac signal is the extracted signal of ring electrode 120, and the second intracardiac signal is the extracted signal of tip electrode 110.In this reality It applies in example, the ring electrode 120 is signal extraction electrode, and two ring electrodes 120 are composed of a pair, intracardiac for extracting first Signal.In other embodiments, it is also possible to a pair in two pairs of ring electrodes for extracting the first intracardiac signal.The tip electrode 110 can be selectively used for extracting the second intracardiac signal or emit RF energy.

In the present embodiment, when tip electrode 110 and radio-frequency power supply disconnection, the tip electrode 110 can be with electrocardiograph monitoring device It is connected, for extracting the second intracardiac signal, and when tip electrode 110 is connected to radio-frequency voltage, is only used for transmitting radio frequency energy Amount, the pairing of ring electrode 120 described in every two at this time is for extracting intracardiac signal, and the extraction of intracardiac signal is independent of tip electrode 110, so the extraction of intracardiac signal is not easily susceptible to the interference of radiofrequency signal, improve the intracardiac signal of extraction accuracy and can By property, in order to which operator judges ablation target spot and ablation terminal in heart according to intracardiac signal, when can shorten operation Between, and improve the safety and validity of operation.In addition, ring electrode 120 is for tip electrode 110, on the one hand its with The contact area of patient's endocardial tissue is small, and the range of the intracardiac signal of extraction is small compared with tip electrode 110, it is easier to the place of electrocardiosignal Reason, improves the accuracy of the intracardiac signal of extraction, and on the other hand, ring electrode 120 can extract the intracardiac of circumferential 360 ° of propagation Signal is not necessarily to multiple rotary radio frequency ablation catheter 100, saves operating time, patient is facilitated to operate, practical.

Specifically, the radio frequency ablation catheter 100 includes four first conducting wires 121 and one second with reference to Fig. 3 and Fig. 4 Conducting wire 115.Each ring electrode 120 is electrically connected with first conducting wire 121, the tip electrode 110 and described second Conducting wire 115 is electrically connected.It is two pairs that four first conducting wires 121, which are divided to, and electrical connection corresponding with two pairs of ring electrodes can be used for transmitting first heart Interior signal.

When extracting the first intracardiac signal, at least a pair of of ring electrode work, and a pair that ring electrode be electrically connected with this One conducting wire is for transmitting the first intracardiac signal.When two pairs of ring electrodes work, be electrically connected with two pairs of ring electrodes two pair first Conducting wire is used to transmit intracardiac signal, and two pairs of ring electrodes can extract the bipolar current potential in the chambers of the heart, will be double by the first conducting wire 122 Electrode potential data are conducted to after handling there is the equipment for more leading function, can be showed the intracardiac signal in the chambers of the heart, be compared In a pair of of ring electrode, the intracardiac signal that can be showed is more acurrate.In other embodiments, a pair of of ring electrode can with two pairs or Two pairs or more of the first conducting wire electrical connection；That is a pair of of ring electrode extracts intracardiac signal, and the first multipair conducting wire transmits the heart Interior signal；When this extracts intracardiac signal to ring electrode, can also only have the first pairs of conducting wire of part for transmitting intracardiac letter Number.

With continued reference to Fig. 3 and Fig. 4, in the present embodiment, the package assembly and group of a kind of new nested electrode are additionally provided Dress method.Specifically, the tip electrode 110 has an inner cavity 111, an outer wall 112, first through hole 113.The first through hole 113 run through the outer wall 112 to be connected to the inner cavity 111.First conducting wire 121 passes through the inner cavity 111 and described the One through-hole 113 is electrically connected with the ring electrode 120.

The radio frequency ablation catheter 100 further includes a pillar 122.The pillar 122 is located in the first through hole 113, And the pillar 122 is sheathed on first conducting wire 121 on the part of the first through hole 113.The pillar 122 is used for Protect first conducting wire 121.When the pillar 122 is assembled on the tip electrode 110, first by the pillar 122 by head electricity The outside of pole 110 penetrates first through hole 113 up to the inner cavity 111 of tip electrode 110, and the first conducting wire 121 is from the beginning electric by pillar 122 The outside of pole 110 penetrates the inner cavity 111 of tip electrode 110, that is to say, that pillar 122 not only protects the first conducting wire 121 in assembling It is injury-free, it is also convenient for the first conducting wire 121 passing through the first through hole 113.

Further, with reference to Fig. 4, open up that there are two annular groove 114, each annulars on the outer surface of the outer wall 112 A ring electrode is arranged in groove 114, and the outer surface of the ring electrode 120 is not less than the outer surface of the outer wall 112.This Place, the outer surface of the ring electrode 120 refer to the outer peripheral surface of the ring electrode 120, and the outer surface of the outer wall 112 is described The outer surface of tip electrode 110, the outer surface of the outer wall 112 is far from the inner cavity 111.For example, the appearance of the ring electrode 120 Face is relative to the convex outer surfaces of the tip electrode 110 or the outer surface of the ring electrode 120 and the tip electrode 110 Flush with outer surface.It should be appreciated that the width of the ring electrode 120 is little when ring electrode is set in annular groove 114 In the width of the annular groove 114, " width " refers to the size in the axial direction of tip electrode.

With continued reference to Fig. 3 and Fig. 4, the first insulating layer is filled between each ring electrode 120 and the tip electrode 110 171, first insulating layer 171 is for being electrically isolated the tip electrode 110 and the ring electrode 120.Particularly, the tip electrode The second insulating layer 172 is full of in 110 inner cavity 111.The second insulating layer 172 can protect 121 He of the first conducting wire Second conducting wire 115, the signal that also can avoid transmitting in the first conducting wire 121 and the second conducting wire 115 are interfered.Preferably, First insulating layer 171 and second insulating layer 172 are the glue of insulation insulation.The material of the glue includes but is not limited to ring Oxygen glue, UV glue, quick-drying gelatin etc..Wherein, UV glue is also known as shadowless glue, light-sensitive emulsion or ultraviolet cured adhesive.

In addition, being sheathed in the adjustable curved segment 130 and with the tip electrode 110 with reference to Fig. 2 apart from nearest ring electrode Third insulating layer 173 is coated between 120 and tip electrode 110.Preferably, the third insulating layer 173 is also the glue of insulation insulation Water.On the one hand make the ring electrode 120 being arranged in adjustable curved segment 130 close apart from tip electrode 110 as far as possible, on the one hand can prevent The RF energy only emitted in tip electrode 110 interferes the extraction of intracardiac signal.Equally, the material packet of the third insulating layer 173 Include but be not limited to epoxy glue, UV glue, quick-drying gelatin etc..Wherein, UV glue is also known as shadowless glue, light-sensitive emulsion or ultraviolet cured adhesive.

As described above, two ring electrodes 120 match the first intracardiac signal that can be extracted in the chambers of the heart, example in the present embodiment Such as electrocardiosignal.Specifically, passing through two ring electrodes 120 and the heart when the first intracardiac signal is extracted in two pairings of ring electrode 120 Chamber different parts are in contact, and extract the intracardiac signal of difference first of different tissues in the chambers of the heart, and two ring electrodes 120 are by the of extraction One intracardiac signal is conducted by the first conducting wire to corresponding equipment (such as cardioelectric monitor equipment) handled after, the heart can be showed Intracavitary intracardiac signal.

The material of the tip electrode 110 and ring electrode 120 can be, but not limited to, stainless steel, copper, platinumiridio etc., excellent The tip electrode 110 of choosing and the material of ring electrode 120 are platinumiridio.

The length of the tip electrode 110 can be 1mm~12mm, preferably 8mm.The width of ring electrode 120 can for 0.5mm~ 4mm, the width of ring electrode 120 are the distance between distal end and the proximal end of ring electrode 120, the width of preferred ring electrode 120 For 1mm.Further, the width of ring electrode 120 is smaller than the 1/3 of 110 length of tip electrode.Two adjacent ring electrodes 120 it Between spacing be 0.5mm~2mm.Wherein, the proximal end of the ring electrode 120 and tip electrode 110 that are sheathed in adjustable curved segment 130 is most Small distance can be 0.1mm~2mm, and the minimum range is namely sheathed on the ring electrode 120 in adjustable curved segment 130 apart from head electricity The nearest distance in the proximal end of pole 110.

In the present embodiment, the ring electrode on tip electrode is sheathed in production, first divides ring electrode 120 and tip electrode 110 After not making, then ring electrode 120 is assembled on tip electrode 110.Compared to directly by physical vapour deposition (PVD), chemical gaseous phase Ring electrode 120 is formed on tip electrode 110 by the mode of deposition, and ring electrode is set in head by above structure and assembling mode On electrode, ring electrode can be effectively prevented and fall off, effectively completely cut off ring electrode and tip electrode, simplify electrode mounting process and reduce and penetrate The manufacturing cost of frequency ablation catheter, while making the performance of the radio frequency ablation catheter more preferably.

With reference to Fig. 1 a and Fig. 1 b, the radio frequency ablation catheter 100 may also include main paragraph 140.The adjustable curved segment 130 Proximal end is connect with the distal end of the main paragraph 140.The main paragraph 140 can be macromolecule woven tube.The macromolecule woven tube In braided wires material can be for stainless steel, Nitinol, PEEK (Polyetheretherketone, polyether-ether-ketone) etc..High score High molecular material in sub- woven tube can be nylon, polyurethane, PEBAX etc..

A and Fig. 1 b is continued to refer to figure 1, the radio frequency ablation catheter 100 may also include control curved hand grip 150.The main paragraph 140 proximal end is connect with the distal end of the control curved hand grip 150.Further, the control curved hand grip 150 includes turntable toggle 151, Turntable toggle 151, to control the distal end bending of radio frequency ablation catheter 100, can mainly be controlled along rotating clockwise or counterclockwise Adjustable curved segment 130 is bent.With reference to Fig. 1 b, such as adjustable 130 bilateral deflection of curved segment can be controlled by turntable toggle 151.The control Curved hand grip 150 further includes knob 152, and the knob 152 is used to lock or unlock the bending of 100 distal end of radio frequency ablation catheter State.

The radio frequency ablation catheter 100 may also include buttock line cable 160, the control curved hand grip 150 and the buttock line cable 160 connections.First conducting wire 121 and second conducting wire 115 may pass through the tip electrode 110, the ring electrode 120, institute Adjustable curved segment 130, the main paragraph 140 and the control curved hand grip 150 is stated to be electrically connected with buttock line cable 160.The buttock line line Cable 160 is for transmitting radiofrequency signal and intracardiac signal.The buttock line cable 160 it is matched with the radio frequency ablation catheter 100 its He connects equipment (such as cardioelectric monitor equipment).

In conclusion in the present embodiment, when carrying out chambers of the heart operation, first by the buttock line line of the radio frequency ablation catheter 100 Cable 160 is connected with corresponding equipment (such as cardioelectric monitor equipment), later, so that portion radio frequency is disappeared by adjusting control curved hand grip 150 Melt the predetermined position in the arrival chambers of the heart of conduit 100, then the first intracardiac signal and tip electrode 110 that extract by ring electrode 120 mention The intracardiac signal of second taken finds ablation target spot, emits RF energy to the muscle at ablation target spot by tip electrode 110 later Tissue is melted, and tip electrode 110 will not be used as intracardiac signal extraction at the same time, but continue to mention by ring electrode 120 The first intracardiac signal is taken, and the first of extraction the intracardiac signal is passed to by buttock line cable 160, buttock line line by the first conducting wire 121 Cable 160 passes to corresponding equipment again, melts terminal with real-time judge.Need to complete relevant treatment and detection according to operation Afterwards, radio frequency ablation catheter is taken out from patient's body.

Embodiment two

Fig. 5 is the tip electrode of the radio frequency ablation catheter of embodiment two and a main view of partial adjustable curved segment, and Fig. 6 is figure Along the cross-sectional view of line C-C, Fig. 7 is Fig. 6 for the tip electrode of the radio frequency ablation catheter of embodiment two shown in 5 and partial adjustable curved segment Shown in embodiment two radio frequency ablation catheter cross-sectional view along line C-C of tip electrode and partial adjustable curved segment partial enlargement Figure, Fig. 8 be the radio frequency ablation catheter of embodiment two shown in fig. 6 tip electrode and partial adjustable curved segment along line D-D section view Figure.

With reference to Fig. 5 to Fig. 8, the radio frequency ablation catheter 100 in the present embodiment further includes being fixed in the adjustable curved segment 130 A pair of of point electrode 180.In the present embodiment, the ring electrode 120 and point electrode 180 are signal extraction electrode, a point Electrode 180 and a pairing of ring electrode 120 are matched for extracting the first intracardiac signal or two point electrodes 180 For extracting the first intracardiac signal.Preferably two point electrodes 180 match, and the signal extracted in this way is more accurate.

The point electrode 180 can be fastened in the adjustable curved segment 130.Specifically, with reference to Fig. 6, Fig. 7 and Fig. 8, it is described can Adjust curved segment 130 in a tubular form.At least two second through-holes 132 are offered on the tube wall 131 of the adjustable curved segment 130.It is each described The point electrode 180 is provided on second through-hole 132.Each point electrode 180 includes the head for extracting intracardiac signal 181, bar portion 182 and fixed part 183, the bar portion 182 run through second through-hole 132, one end of the bar portion 182 with it is described Head 181 is fixedly connected, and the other end of the bar portion 182 is fixedly connected with the fixed part 183, and the head 181 is stuck in The outside of the tube wall 131, the fixed part 183 are stuck in the inside of tube wall 131.Electricity will be put by head 181 and fixed part 183 Pole 180 is stuck on the tube wall 131 of adjustable curved segment 130, had both been prevented point electrode 180 to be detached from tube wall 131 and has been fallen to radio frequency ablation catheter 100 outside also prevents point electrode 180 and is detached from the inside that tube wall 131 falls to radio frequency ablation catheter 100, can effectively keep away Exempt from point electrode 180 to fall off from adjustable curved segment 130, improves the reliability and safety of radio frequency ablation catheter 100.

The fixed part 183 is, for example, cone or rotary table, the other end of the fixed part 183 and the bar portion 182 One end of connection is the bottom surface of cone, or is the biggish bottom surface of rotary table area.In this way, being convenient for fixed part 183 from adjustable bending The second through-hole 132 is passed through outside the tube wall 131 of section 130 to enter in tube wall 131, and point electrode 180 is stuck in by pipe by the bottom surface On wall 131.

With reference to Fig. 8, the radio frequency ablation catheter 100 in the present embodiment may also include the second conducting wire 115, second conducting wire 115 tube walls 131 for passing through the adjustable curved segment 130 are electrically connected with the point electrode 180, and second conducting wire 115 is for transmitting The the first intracardiac signal extracted.For example, second conducting wire 115 may pass through tube wall 131 directly with the head 181 of point electrode 180 Connection.Certainly, one of the bar portion 182 of the point electrode 180 and fixed part 183 can be electrically connected with the second conducting wire 115, to pass Pass the first intracardiac signal of extraction.

Preferably, at least two point electrodes 180 are along the circumferentially distributed of adjustable curved segment 130, i.e., so that at least two institutes It states point electrode 180 to be annularly distributed in the adjustable curved segment 130, in order in the same position of the radio frequency ablation catheter 100 The intracardiac signal that place extracts musculature neighbouring in the chambers of the heart is set, the accuracy of the intracardiac signal of extraction so can be improved.

With reference to Fig. 5, the outer surface that point electrode 180 is exposed is that (for example point electrode 180 is hemispherical or ellipsoid to curved surface Shape structure), that is, the outer surface of point electrode 180 can have certain radian.Herein, the outer surface that point electrode 180 is exposed refers to Point electrode 180 far from it is described can curved segment outer surface one side.During surgery, the outer surface of point electrode 180 is close to musculature, Contact area is bigger.

Embodiment three

It is the tip electrode of the radio frequency ablation catheter in embodiment three and the main view of partial adjustable curved segment with reference to Fig. 9, Fig. 9 Figure.The radio frequency ablation catheter of the present embodiment and the difference of the radio frequency ablation catheter in embodiment one be, only a pair of of ring electrode 120, and the ring electrode 120 is sheathed in the adjustable curved segment 130.Preferably, make the extraction point of intracardiac signal close to head Electrode, that is to say, that close to ablation target spot, the accuracy and reliability of intracardiac signal extraction can be improved.

Example IV

It is the tip electrode of the radio frequency ablation catheter in example IV and the main view of partial adjustable curved segment with reference to Figure 10, Figure 10 Figure, the difference of the radio frequency ablation catheter and the radio frequency ablation catheter in embodiment one of the present embodiment are there is a pair of of point electrode 180 With a pair of of ring electrode 120, it is all set in the adjustable curved segment 130.

Embodiment five

The difference between this embodiment and the first embodiment lies in the radio frequency ablation catheter only includes point electrode, and point electrode is equal It is arranged in adjustable curved segment, any two point electrode is matched for extracting intracardiac signal.

Radio frequency ablation catheter in any of the above-described embodiment can be integrated into electrocardiograph monitoring device and radio-frequency power supply to be penetrated Frequency ablation system, when second conducting wire of the radio frequency ablation catheter and radio-frequency power supply disconnection, second conducting wire It is electrically connected with the electrocardiosignal monitoring device, when second conducting wire of the radio frequency ablation catheter and the radio-frequency power supply connect When logical, second conducting wire and the electrocardiosignal monitoring device are disconnected；First conducting wire is supervised with the electrocardiosignal always Device electrical connection is surveyed, details are not described herein again.

It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment emphasis is said Bright is the difference from other embodiments, and the same or similar parts in each embodiment may refer to each other.

In addition, " proximal end " and " distal end " in above-described embodiment is opposite from the point of view of the doctor's angle for using the medical instrument In mutual element or the relative bearing of movement, relative position, direction, although " proximal end " and " distal end " be not it is restrictive, But " proximal end " is often referred to the Medical Devices in course of normal operation close to one end of doctor, and " distal end " typically refers to first Into one end of patient's body.In addition, the term "or" in above-described embodiment is usually to be carried out with including the meaning of "and/or" It uses, except in addition explicitly pointing out.

Foregoing description is only the description to the utility model preferred embodiment, not to any limit of the scope of the utility model Fixed, any change, the modification that the those of ordinary skill in the utility model field does according to the disclosure above content belong to right and want Seek the protection scope of book.

Claims (13)

1. a kind of radio frequency ablation catheter, including tip electrode, which is characterized in that further include at least a pair of of signal extraction electrode, at least A pair of first conducting wire and the second conducting wire；Wherein, two signal extraction electrodes in each pair of signal extraction electrode with it is each pair of Two first conducting wires in first conducting wire are electrically connected, and each pair of signal extraction electrode is for extracting the first intracardiac letter Number, each pair of first conducting wire is used for transmission the described first intracardiac signal；The tip electrode is electrically connected with second conducting wire, institute It states tip electrode to be alternatively used for transmitting RF energy or be used to extract the second intracardiac signal, second conducting wire is selectively It is used for transmission the RF energy or the second intracardiac signal.

2. radio frequency ablation catheter as described in claim 1, which is characterized in that at least a pair of signal extraction electrode extremely A few electrode is nested electrode, and the nesting electrode sleeve is set on the tip electrode, the nesting electrode and the tip electrode Between filled with the first insulating layer the tip electrode and the nested electrode is isolated.

3. radio frequency ablation catheter as claimed in claim 2, which is characterized in that the tip electrode have an inner cavity, an outer wall with And through the outer wall with first through hole in communication with the inner cavity, first conducting wire passes through the inner cavity and described first and leads to Hole is electrically connected with the nested electrode.

4. radio frequency ablation catheter as claimed in claim 3, which is characterized in that the radio frequency ablation catheter further includes a pillar, The pillar is located in the first through hole, and the protective pipe sleeve is set to the part that first conducting wire passes through the first through hole On.

5. radio frequency ablation catheter as claimed in claim 4, which is characterized in that the nesting electrode is ring electrode.

6. radio frequency ablation catheter as claimed in claim 5, which is characterized in that offer at least one on the outer surface of the outer wall A annular groove is provided with the ring electrode in each annular groove, and the outer surface of the ring electrode is not less than The outer surface of the outer wall.

7. radio frequency ablation catheter as claimed in claim 6, which is characterized in that the tip electrode it is interior it is intracavitary be filled with second absolutely Edge layer is to be isolated first conducting wire and second conducting wire.

8. radio frequency ablation catheter as claimed in claim 7, which is characterized in that first insulating layer and second insulating layer are exhausted The glue of electricity insulation.

9. radio frequency ablation catheter as described in claim 1, which is characterized in that including two pairs of signal extraction electrodes, wherein A pair of signal extraction electrode is point electrode.

10. radio frequency ablation catheter as claimed in claim 9, which is characterized in that the radio frequency ablation catheter further includes adjustable bending Section, the distal end of the adjustable curved segment are connect with the tip electrode, and the point electrode is fastened in the adjustable curved segment.

11. radio frequency ablation catheter as claimed in claim 10, which is characterized in that the adjustable curved segment is in a tubular form, described adjustable At least two second through-holes are offered on the tube wall of curved segment, are provided with the point electrode in each second through-hole, often A point electrode includes head, bar portion and the fixed part for extracting the first intracardiac signal, and the bar portion runs through described second Through-hole, one end of the bar portion are fixedly connected with the head, and the other end of the bar portion is fixedly connected with the fixed part, and The head is stuck in the outside of the tube wall, and the fixed part is stuck in the inside of the tube wall.

12. radio frequency ablation catheter as claimed in claim 11, which is characterized in that the fixed part be cone or rotary table, One end that the fixed part is connect with the other end of the bar portion is the bottom surface of cone, or is the biggish bottom of rotary table area Face.

13. a kind of radio frequency ablation system, which is characterized in that disappear including the radio frequency as described in any one of claim 1~12 Melt conduit, electrocardiosignal monitoring device and radio-frequency power supply, when the second conducting wire and the radio frequency electrical of the radio frequency ablation catheter When source disconnects, second conducting wire is electrically connected with the electrocardiosignal monitoring device, when described the of the radio frequency ablation catheter When two conducting wires are connected to the radio-frequency power supply, second conducting wire and the electrocardiosignal monitoring device are disconnected；First conducting wire begins It is whole to be electrically connected with the electrocardiosignal monitoring device.