CN213821695U - Radio frequency ablation catheter with cooling function and intravascular interventional therapy system - Google Patents

Abstract

Translated fromChinese

本实用新型公开了一种带有冷却功能的射频消融导管及血管内介入治疗系统，射频消融导管包括控制手柄和导管主体，导管主体的近端连接在控制手柄上，导管主体的远端设有消融电极，导管主体内设有引线腔和冷却水腔，控制手柄上设有用于与消融设备连接的消融插头和用于与灌注设备连接的灌注接头，消融电极连接的电极引线通过引线腔连接到消融插头；冷却水腔经过控制手柄与灌注接头连通。通过射频消融，可以实现目标静脉的闭合手术。通过在导管主体内设置沿导管主体轴向设置的冷却水腔，冷却水腔内的冷却液可以对消融电极进行降温，减小消融电极表面结痂的概率，减少手术过程中导管主体抽出擦除结痂的次数，从而缩短手术时间，提高工作效率。

The utility model discloses a radiofrequency ablation catheter with a cooling function and an intravascular interventional treatment system. The radiofrequency ablation catheter comprises a control handle and a catheter body, the proximal end of the catheter body is connected to the control handle, and the distal end of the catheter body is provided with The ablation electrode, a lead cavity and a cooling water cavity are arranged in the main body of the catheter, an ablation plug for connecting with the ablation device and an irrigation joint for connecting with the perfusion device are arranged on the control handle, and the electrode lead connected to the ablation electrode is connected to the ablation device through the lead cavity. The ablation plug; the cooling water cavity is communicated with the perfusion connector through the control handle. With radiofrequency ablation, closed surgery of the target vein can be achieved. By arranging a cooling water cavity in the catheter body along the axial direction of the catheter body, the cooling liquid in the cooling water cavity can cool the ablation electrode, reduce the probability of crusting on the surface of the ablation electrode, and reduce the extraction and erasing of the catheter body during the operation. The number of scabs is reduced, thereby shortening the operation time and improving work efficiency.

Description

Radio frequency ablation catheter with cooling function and intravascular interventional therapy system

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to radio frequency ablation catheter and endovascular interventional therapy system with cooling function.

Background

Veins are the conduits for blood to flow back to the heart, and varicose veins refer to the tortuosity and expansion of veins caused by blood stasis, weak vein walls and other factors, and cause problems in the process of blood backflow.

The most common site of varicose veins is in the lower extremities. The varicose vein of lower limb has the treatment methods of wearing elastic socks, injecting hardener, removing operation and the like, and the deep venous valve has incomplete function and can be used for valve repair operation, endoscopic traffic branch ligation and the like. Varicose veins of lower limbs can also indicate the existence of other diseases, and the primary disease needs to be actively treated; if the deep vein is not smooth, the surgery should be more cautious to treat the superficial vein.

The denudation is too traumatic, requires multiple openings in the leg, and causes significant damage to the tissue surrounding the vein when the vein is denuded. The elastic socks belong to auxiliary treatment, and are used for varicose veins at the early stage or used for health care treatment after exfoliation or other operations.

At present, radio frequency, laser, sclerosing agent and other operation modes appear in the international market, and the method belongs to a minimally invasive technology. Small wound in operation, quick recovery after operation, good effect and the like. The intravenous radio frequency closing technology is the first choice scheme of the treatment of the lower limb varicose vein, develops a high-efficiency, stable and reliable intravascular interventional treatment system, and has very important significance for the treatment of the lower limb varicose vein.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a radiofrequency ablation catheter with cooling function and endovascular intervention treatment system for the intracavitary closed operation of vein. The puncture point is selected and the great saphenous vein is punctured near human low limbs knee at first to use the pjncture needle in the operation process, puts into the puncture sheath afterwards, will along the puncture sheath catheter carry to intravascular saphenous vein junction, be connected catheter and radio frequency equipment and cooling water perfusion equipment, carry out the heat through release radio frequency energy and melt the processing to the target blood vessel to realize that the blood vessel is closed, perfusion equipment can last or intermittent type nature inputs the coolant liquid to the catheter in melting process to reduce the possibility of electrode surface scabbing.

In order to solve the technical problem, the technical scheme of the utility model as follows:

a radio frequency ablation catheter with a cooling function comprises a control handle and a catheter main body, wherein the catheter main body comprises a near end and a far end, the near end of the catheter main body is connected to the control handle, an ablation electrode is arranged at the far end of the catheter main body, a lead cavity and a cooling water cavity are arranged in the catheter main body, an ablation plug used for being connected with ablation equipment and a perfusion connector used for being connected with perfusion equipment are arranged on the control handle, and an electrode lead connected with the ablation electrode is connected to the ablation plug through the lead cavity; the near end of the cooling water cavity is communicated with the perfusion joint through the control handle, and the far end of the cooling water cavity extends into the pipe section of the catheter main body, wherein the pipe section is provided with the ablation electrode.

Furthermore, the filling connector comprises a water inlet connector and a water outlet connector, the cooling water cavity comprises a water inlet cavity and a water outlet cavity which are communicated, the water inlet end of the water inlet cavity is communicated with the water inlet connector, and the water inlet end of the water outlet cavity is communicated with the water outlet connector; the water inlet connector, the water inlet cavity, the water outlet cavity, the water inlet connector and the filling equipment form a cooling liquid circulation loop.

Furthermore, the ablation electrode is a section of round tube on the catheter main body, a perfusion micropore communicated with the cooling water cavity is arranged on the ablation electrode, and cooling liquid in the cooling water cavity can be sprayed out through the perfusion micropore.

Further, the ablation electrode comprises at least one negative electrode and at least two positive electrodes, and any one negative electrode is positioned between two adjacent positive electrodes; gaps are reserved between the adjacent positive electrodes and the adjacent negative electrodes, and each electrode is connected with an electrode lead.

Further, the far end of the catheter main body is provided with one or more temperature sensors used for monitoring the working temperature of the ablation electrode, and a lead connected with the temperature sensors is connected to the ablation plug through the lead cavity.

Furthermore, a lead cavity, a water inlet cavity and a water outlet cavity are arranged in the catheter main body; the lead wire cavity is used for the electrode lead wire and the temperature sensor to connect the passing through of lead wire, the cross-section in lead wire cavity is the thick appearance in middle of both ends, the intake antrum with go out the water cavity and be located respectively the relative both sides of the thin part in middle of the lead wire cavity.

Furthermore, a guide wire cavity for a guide wire to pass through is also arranged in the catheter body.

Furthermore, a guide wire cavity, two lead wire cavities, a water inlet cavity and a water outlet cavity are arranged in the catheter main body; the lead cavity is used for the electrode lead and the temperature sensor connecting lead to pass through, and the guide wire cavity is used for the guide wire to pass through; the guide wire cavity is positioned in the middle of the catheter main body; the water inlet chamber go out the water cavity, two lead wire chamber encircles and arranges the periphery in guide wire chamber, two lead wire chamber symmetry sets up the relative both sides in guide wire chamber, the water inlet chamber with it sets up to go out the water cavity symmetry lead wire chamber other relative both sides.

Further, the catheter body comprises an outer tube, an inner tube, and a water tube; the outer tube is used for providing support and the cover is established the periphery of inner tube, the inner chamber of inner tube is the seal wire chamber, the outer tube in with cavity between the inner tube outside does lead the wire chamber, the water pipe sets up in the lead wire chamber, the inner chamber of water pipe is the cooling water chamber.

Further, the ablation electrode, the outer tube and the water tube are all fixed on the inner tube in an adhesive mode.

Further, the front end of the catheter main body is a tip structure with a bend or a flexible guide wire or a guide wire cavity, or the front end of the catheter main body is a section of spring hose; the spring hose and the tip structure are used to guide the orientation of the catheter body.

On the other hand, the utility model also provides an endovascular intervention treatment system with cooling function, including radio frequency equipment, perfusion equipment and as above the radio frequency that has cooling function melts the pipe, radio frequency equipment melts the plug connection that melts of brake valve lever on the pipe with the radio frequency, perfusion equipment melts the joint connection that fills of brake valve lever on the pipe with the radio frequency.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a radiofrequency ablation catheter with cooling function, at the operation in-process, with radiofrequency ablation catheter transport to intravascular saphenous vein junction, with radiofrequency ablation catheter's brake valve lever and radio frequency equipment and perfusion equipment be connected, melt electrode switch-on radio frequency equipment back and carry out the heat through release radio frequency energy to target blood vessel and melt the processing to realize the vascular closure. The perfusion device can continuously or intermittently inject cooling liquid into the cooling water cavity in the catheter main body, and the temperature of the surface of the ablation electrode can be reduced by the cooling liquid passing through the cooling water cavity, so that the probability of scabbing on the surface of the ablation electrode in the operation process is reduced, the frequency of taking out the radio frequency ablation catheter to wipe the scabbing in the operation process is reduced, the operation time is shortened, and the working efficiency is improved.

2. The utility model provides a radio frequency ablation catheter with cooling function, water supply connector and play water swivel on the brake valve lever and the back of filling equipment switch-on, can last or intermittent type nature to the intracavity of intaking input coolant liquid melting in-process filling equipment, and the coolant liquid can cyclic utilization in coolant liquid circulation circuit, compare with the outside spun mode of coolant liquid through filling the micropore on melting the electrode, under the prerequisite of the temperature on ensureing effectively to reduce and melt electrode surface, not only can reduce the coolant liquid and enter the influence of blood vessel to the human body, and the cooling rate of electrode is melted through the velocity of flow control in the control coolant liquid circulation circuit to the convenience.

3. The utility model provides a radio frequency ablation catheter with cooling function, the pipe wall setting on melting the electrode fills the micropore, and the coolant liquid in the cooling water intracavity can not only reduce the temperature of blood in near ablation electrode blood vessel through filling the outside blowout of micropore, can also dilute blood concentration, effectively prevents that the ion in the blood from scabbing and influencing the normal work that melts the electrode on melting electrode surface to improve the validity and the security that melt.

4. The utility model provides a radiofrequency ablation catheter with cooling function, the temperature sensor of the distal end of catheter main part can monitor the operating temperature who melts the electrode, and the flow size of the output of convenient temperature monitoring signal control radio frequency equipment and perfusion equipment output coolant liquid that detects is according to.

5. The utility model provides a radiofrequency ablation catheter with cooling function, the cross-section in lead wire chamber is the thin appearance in the middle of the both ends are thick, the relative both sides of thin part in the middle of the intake antrum and play water cavity are located the lead wire chamber respectively, the pipe main part of this kind of structural layout, simple structure, the overall arrangement is compact, inner space that can make full use of pipe main part, the electrode lead wire of a plurality of electrode connection can walk the line in same lead wire chamber, the intake antrum can exert the effect of taking away the ablation electrode heat with the coolant liquid of going out the water cavity better.

6. The utility model provides a radio frequency ablation catheter with cooling function, wherein a guide wire cavity is arranged in the middle of a catheter main body, and a water inlet cavity, a water outlet cavity and two lead wire cavities are arranged around the periphery of the guide wire cavity; the catheter main body with the structural layout is compact in layout, the internal space of the catheter main body can be fully utilized, the electrode leads of the positive electrode and the negative electrode can be wired in different lead cavities, interference between the electrode leads is reduced, and cooling liquid in the water inlet cavity and the water outlet cavity can better play a role in taking away heat of the ablation electrode.

7. The utility model provides a radio frequency ablation catheter with cooling function, the catheter main body adopts an outer sleeve inner tube, a water pipe is arranged in the gap between the inner tube and the outer tube, the inner cavity of the inner tube is used as a thread guide cavity, the cavity between the inner part of the outer tube and the outer part of the inner tube is used as a lead cavity, and the inner cavity of the water pipe is used as a cooling water cavity; the catheter main body with the structural design adopts the structure that the inner tube and the water tube are sleeved by the outer tube, and compared with the mode that the guide wire cavity, the cooling water cavity and the lead cavity are directly arranged on the catheter main body, the catheter main body with the structural design is simpler to manufacture.

8. The utility model provides an endovascular intervention treatment system with cooling function, in the operation process, the radiofrequency ablation catheter is conveyed to the junction of the saphenous vein in the blood vessel, and the radiofrequency device releases radiofrequency energy through the ablation electrode on the catheter main body to perform thermal ablation treatment on the target blood vessel, thereby realizing the blood vessel closure; the perfusion device can continuously or intermittently inject cooling liquid into the cooling water cavity in the catheter main body, and the temperature of the surface of the ablation electrode can be reduced by the cooling liquid passing through the cooling water cavity, so that the probability of scabbing on the surface of the ablation electrode in the operation process is reduced, the frequency of taking out the radio frequency ablation catheter to wipe the scabbing in the operation process is reduced, the operation time is shortened, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an intravascular interventional treatment system with a cooling function according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a radiofrequency ablation catheter in an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a distal end of a rf ablation catheter in accordance with an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a distal end of a rf ablation catheter in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a first catheter body in an embodiment of the invention;

fig. 6 is a cross-sectional view of a second catheter body in an embodiment of the invention;

FIG. 7 is a cross-sectional view of a third catheter body in an embodiment of the invention;

FIG. 8 is a schematic view of a first catheter tip according to an embodiment of the present invention;

fig. 9 is a schematic view of a second catheter tip according to an embodiment of the present invention;

FIG. 10 is a schematic view of a third embodiment of a catheter tip according to the present invention;

fig. 11 is a schematic view of a fourth embodiment of a catheter tip according to the present invention;

fig. 12 is a schematic view illustrating the distribution of the ablation electrodes on the catheter body according to the embodiment of the present invention, wherein the irrigation micropores are not formed on the positive electrode and the negative electrode;

fig. 13 is a schematic view illustrating the distribution of the ablation electrodes on the catheter body according to the embodiment of the present invention, wherein the negative electrode is provided with perfusion micropores, and the positive electrode is not provided with perfusion micropores;

fig. 14 is a schematic view illustrating the distribution of the ablation electrodes on the catheter body according to the embodiment of the present invention, wherein the positive electrode and the negative electrode are provided with perfusion micropores;

fig. 15 is a schematic view of an application scenario of the rf ablation catheter of the intravascular interventional treatment system with cooling function in delivering into a target vein according to the embodiment of the present invention.

Description of reference numerals: 1. a radiofrequency ablation catheter; 2. a radio frequency device; 3. a perfusion apparatus; 31. a perfusion pump; 32. a filling pipeline; 11. a catheter body; 111. a lead cavity; 112. a water inlet cavity; 113. a water outlet cavity; 114. a guidewire lumen; 12. an ablation electrode; 121. a positive electrode; 122. a negative electrode; 13. a catheter tip; 14. a control handle; 141. a water inlet joint; 142. an ablation joint; 143. a water outlet joint; 144. a handle body; 15. a temperature sensor; 16. an electrode lead; 11.1, an outer tube; 11.2, an inner tube; 11.3, a water pipe; 11.4, spacer ring.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

An endovascular interventional therapy system with cooling function, as shown in fig. 1, is composed of aradiofrequency ablation catheter 1, aradiofrequency device 2 and aninfusion device 3. Theperfusion device 3 comprises aperfusion pump 31 and aperfusion pipeline 32, and theradio frequency device 2 comprises a connection module, a control module, a temperature module and a power output module.

As shown in fig. 2, the radiofrequency ablation catheter 1 includes acontrol handle 14 and acatheter body 11. The cathetermain body 11 comprises a proximal end and a distal end, the proximal end of the cathetermain body 11 is connected to the control handle 14, the distal end of the cathetermain body 11 is provided with acatheter tip 13, and the part of the cathetermain body 11 close to thecatheter tip 13 is provided with anablation electrode 12. The cathetermain body 11 is provided therein with alead wire lumen 111 and a cooling water lumen (see fig. 3 or fig. 4). The control handle 14 comprises ahandle body 144, and an ablation plug, awater inlet connector 141 and awater outlet connector 143 which are connected to thehandle body 144. The ablation plug is used for being electrically connected with a connecting module of the ablation device; thewater inlet connector 141 and thewater outlet connector 143 are used for communicating with theperfusion line 32 of theperfusion apparatus 3. Anelectrode lead 16 to which theablation electrode 12 is connected to an ablation plug through a lead lumen 111 (see fig. 3 or 4, respectively).

As shown in fig. 2-5, the cooling water cavity includes awater inlet cavity 112 and awater outlet cavity 113 which are communicated, the water inlet end of thewater inlet cavity 112 is communicated with the water inlet joint 141 through the control handle 14, the water outlet end of thewater outlet cavity 113 is communicated with the water outlet joint 143 through the control handle 14, the distal ends of thewater inlet cavity 112 and thewater outlet cavity 113 extend into the pipe section of the cathetermain body 11 provided with theablation electrode 12, and the water inlet joint 141, thewater inlet cavity 112, thewater outlet cavity 113, the water inlet joint 141 and the perfusion device form a cooling liquid circulation loop.

In the operation process, theradiofrequency ablation catheter 1 is conveyed to the junction of the saphenous femoral vein in the blood vessel, and theradiofrequency device 2 releases radiofrequency energy through theablation electrode 12 on the cathetermain body 11 to perform thermal ablation treatment on a target blood vessel, so that the blood vessel is closed. The water inlet joint 141 and the water outlet joint 143 on the control handle 14 are connected with theperfusion device 3, theperfusion device 3 can continuously or intermittently inject cooling liquid into the cooling water cavity in the cathetermain body 11, the temperature of the surface of theablation electrode 12 can be reduced by the cooling liquid passing through the cooling water cavity, so that the probability of scabbing on the surface of theablation electrode 12 in the operation process is reduced, the times of taking out the radiofrequency ablation catheter 1 to remove the scabs in the operation process is reduced, the operation time is shortened, and the working efficiency is improved. In addition, the cooling liquid can be recycled in the cooling liquid circulation loop, and compared with the mode that the cooling liquid is sprayed outwards through the micropores filled in theablation electrode 12, on the premise of effectively reducing the surface temperature of theablation electrode 12, the influence of the cooling liquid entering the blood vessel on the human body can be reduced, and the cooling rate of the ablation electrode can be conveniently controlled by controlling the flow speed in the cooling liquid circulation loop. In addition, because the cooling liquid does not need to enter the blood vessels of the human body, other cooling media except physiological saline can be selected as the cooling liquid, the temperature of the cooling liquid can not be limited to the normal temperature, and the cooling liquid with lower temperature can be selected to improve the cooling effect of the cooling liquid on the surface temperature of theablation electrode 12.

In another embodiment of this embodiment, the cooling water cavity may also be thewater inlet cavity 112, and theablation electrode 12 is provided with perfusion micropores communicated with the cooling water cavity (see fig. 11 and 12). The perfusion micropores are arranged on the wall of theablation electrode 12, and the cooling liquid in the cooling water cavity can be sprayed out through the perfusion micropores, so that the temperature of blood in a blood vessel near theablation electrode 12 can be reduced, the blood concentration can be diluted, ions in the blood can be effectively prevented from scabbing on the surface of theablation electrode 12 to influence the normal work of theablation electrode 12, and the effectiveness and the safety of ablation can be improved.

As shown in fig. 3 and fig. 8-13, theablation electrode 12 includes two sets ofpositive electrodes 121 and a set ofnegative electrodes 122, thenegative electrode 122 is located between the two sets ofpositive electrodes 121, a gap is provided between adjacentpositive electrodes 121 andnegative electrodes 122, thepositive electrodes 121 and thenegative electrodes 122 are both a section of circular tube on the cathetermain body 11, and the length of thenegative electrode 122 is twice as wide as the length of thepositive electrode 121. In some embodiments, adjacent positive andnegative electrodes 121, 122 may also be separated by a spacer ring 11.2. Oneelectrode lead 16 is connected to each electrode. The distal end of thecatheter body 11 is provided with one ormore temperature sensors 15 for monitoring the operating temperature of theablation electrode 12, and the lead wires to which thetemperature sensors 15 are connected to the ablation plug through thelead wire lumen 111. Thetemperature sensor 15 at the distal end of the cathetermain body 11 can monitor the working temperature of theablation electrode 12, and the output power of theradio frequency device 2 and the flow of the cooling liquid output by theperfusion device 3 can be conveniently controlled according to the detected temperature monitoring signal.

The schematic diagram of the first embodiment of the distal portion of theradiofrequency ablation catheter 1 shown in fig. 4 differs from the first embodiment in that theablation electrode 12 comprises three sets ofpositive electrodes 121 and two sets ofnegative electrodes 122, eachnegative electrode 122 being located in the middle of two adjacent sets ofpositive electrodes 121. Theablation electrode 12 with the structural design is beneficial to reducing the accumulation of positive ions near the singlenegative electrode 122, and further reducing the probability of scabbing on the surface of thenegative electrode 122.

In the first embodiment of thecatheter body 11 shown in fig. 5, thecatheter body 11 is provided with aguidewire lumen 111, aninlet lumen 112, and anoutlet lumen 113; thelead wire cavity 111 is used for theelectrode lead wire 16 and thetemperature sensor 15 to pass through, the cross section of thelead wire cavity 111 is in a shape with two thick ends and a thin middle, and thewater inlet cavity 112 and thewater outlet cavity 113 are respectively positioned at two opposite sides of the thin middle part of thelead wire cavity 111. The section of thelead cavity 111 is in the shape of thick two ends and thin middle, thewater inlet cavity 112 and thewater outlet cavity 113 are respectively positioned at two opposite sides of the thin middle part of thelead cavity 111, the cathetermain body 11 with the structural layout has simple structure and compact layout, the internal space of the cathetermain body 11 can be fully utilized, the electrode leads 16 connected with a plurality of electrodes can be wired in thesame lead cavity 111, and the cooling liquid in thewater inlet cavity 112 and thewater outlet cavity 113 can better play a role of taking away the heat of theablation electrode 12.

In the second embodiment of the cathetermain body 11 shown in fig. 6, aguide wire cavity 114, twoguide wire cavities 111, aninlet cavity 112 and anoutlet cavity 113 are arranged in the cathetermain body 11; thelead cavity 111 is used for theelectrode lead 16 and thetemperature sensor 15 to be connected with the lead to pass through, and theguide wire cavity 114 is used for the guide wire to pass through; theguidewire lumen 114 is located in the middle of thecatheter body 11; thewater inlet cavity 112, thewater outlet cavity 113 and the twolead wire cavities 111 are arranged around the periphery of theguide wire cavity 114, the twolead wire cavities 111 are symmetrically arranged on two opposite sides of theguide wire cavity 114, and thewater inlet cavity 112 and thewater outlet cavity 113 are symmetrically arranged on the other two opposite sides of thelead wire cavity 111. Aguide wire cavity 114 is arranged in the middle of the cathetermain body 11, and thewater inlet cavity 112, thewater outlet cavity 113 and the twoguide wire cavities 111 are arranged on the periphery of theguide wire cavity 114 in a surrounding mode; the cathetermain body 11 with the structural layout is compact in layout, the internal space of the cathetermain body 11 can be fully utilized, the electrode leads 16 of thepositive electrode 121 and thenegative electrode 122 can be routed indifferent lead cavities 111, interference among the electrode leads 16 is reduced, and cooling liquid in thewater inlet cavity 112 and thewater outlet cavity 113 can better play a role in taking away heat of theablation electrode 12.

In a third embodiment of thecatheter body 11, as shown in fig. 7, thecatheter body 11 comprises an outer tube 11.1, an inner tube 11.2, a water tube 11.3 and a spacer ring 11.4 (see fig. 14); the outer tube 11.1 is used for providing support and is sleeved on the periphery of the inner tube 11.2, the inner cavity of the inner tube 11.2 is aguide wire cavity 114 allowing a guide wire to pass through, a cavity between the inside of the outer tube 11.1 and the outside of the inner tube 11.2 is alead wire cavity 111, the water tubes 11.3 are arranged in thelead wire cavity 111, the number of the water tubes 11.3 can be one or more, the inner tube 11.2 can provide support for the water tubes 11.3, and the inner cavity of the water tubes 11.3 is awater inlet cavity 112. The spacer ring 11.4 serves to separate thepositive electrode 121 and thenegative electrode 122. Thecatheter tip 13, thepositive electrode 121, thenegative electrode 122, the outer tube 11.1 and the water tube 11.3 are all fixed on the inner tube 11.2 by gluing. Thenegative electrode 122 is provided with perfusion micropores. In an alternative embodiment, both thepositive electrode 121 and thenegative electrode 122 are provided with potting pores.

Fig. 8 shows a schematic view of afirst catheter tip 13, and thecatheter tip 13 at the distal end of thecatheter body 11 has a tip structure with a curve, which can serve to guide the direction of the catheter.

Fig. 9 shows a second structure of thecatheter tip 13, in which thecatheter tip 13 at the distal end of thecatheter body 11 is a section of spring hose, which serves to guide the direction of the catheter.

Fig. 10 is a schematic structural view of athird catheter tip 13, and thecatheter tip 13 at the distal end of thecatheter body 11 is a head with a smooth arc to avoid damage to the inner wall of the blood vessel.

Fig. 11 is a schematic structural view of afourth catheter tip 13, and thecatheter tip 13 at the distal end of thecatheter body 11 is a head end with a guide wire lumen through which the catheter can be guided into a tortuous and complex blood vessel.

Fig. 12 is a schematic view of a first structure of theablation electrode 12, in which thenegative electrode 122 is a section of smooth-surfaced circular tube, and the material of the smooth-surfaced circular tube may be stainless steel, a nickel-titanium tube, platinum-iridium alloy, or other conductive tubes.

Fig. 13 is a schematic diagram of a second structure of theablation electrode 12, in which thenegative electrode 122 is a section of circular tube with perfusion micropores on the surface, and the cathetermain body 11 can spray cooling liquid from the micropores during operation, and the material of the negative electrode can be stainless steel, nickel-titanium tube, platinum-iridium alloy or other tubes with conductive function.

Fig. 14 is a schematic view showing a third structure of theablation electrode 12, in which thepositive electrode 121 and thenegative electrode 122 are both a section of circular tube with perfusion micropores on the surface, and the cathetermain body 11 can spray cooling liquid from the micropores during operation, and the material of the catheter main body can be stainless steel, a nickel-titanium tube, platinum-iridium alloy or other tubes with conductive function.

Figure 15 is the application scene sketch map of radiofrequency ablation catheter 1 when sending into the target vein, and in the operation process, at first use pjncture needle near human low limbs knee to select the puncture point and puncture the great saphenous vein, put into the puncture sheath afterwards, will along the puncture sheath radiofrequency ablation catheter 1 carry to intravascular saphenous vein junction below about 2cm, be connected radiofrequency ablation catheter 1 andradio frequency equipment 2 and coolingwater perfusion equipment 3, carry out the heat through releasing radio frequency energy to the target blood vessel and melt the processing to realize the vascular closure. And judging the closing effect of the ablation vessel according to the Doppler image in the operation, withdrawing the radiofrequency ablation catheter 1 after the vessel is closed, and repeating the ablation until the vessel is closed to a puncture point. Theirrigation device 3 may continuously or intermittently deliver cooling fluid into therf ablation catheter 1 during the ablation procedure to reduce the potential for scarring of the electrode surfaces.

Theradiofrequency device 2 comprises a connecting module, a control module, a temperature module and a power output module, wherein theablation connector 142 is connected with a corresponding interface of the radiofrequency ablation instrument into a whole, when theradiofrequency device 2 outputs energy, current passes through theablation connector 142, the conductive wire reaches theablation electrode 12, and one or more radiofrequency loops are formed between thepositive electrode 121 and thenegative electrode 122, so that radiofrequency energy output is realized. The temperature of theradiofrequency ablation electrode 12 is acquired through thetemperature sensor 15, the temperature signal is transmitted to theradiofrequency device 2 through a lead, and theradiofrequency device 2 adjusts the implemented parameters to carry out more reasonable control.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (12)

1. The radio frequency ablation catheter with the cooling function is characterized by comprising a control handle (14) and a catheter main body (11), wherein the catheter main body (11) comprises a near end and a far end, the near end of the catheter main body (11) is connected to the control handle (14), an ablation electrode (12) is arranged at the far end of the catheter main body (11), a lead cavity (111) and a cooling water cavity are arranged in the catheter main body (11), an ablation plug used for being connected with ablation equipment and a perfusion connector used for being connected with perfusion equipment (3) are arranged on the control handle (14), and an electrode lead (16) connected with the ablation electrode (12) is connected to the ablation plug through the lead cavity (111); the near end of the cooling water cavity is communicated with the perfusion joint through the control handle (14), and the far end of the cooling water cavity extends into the pipe section of the catheter main body (11) provided with the ablation electrode (12).

2. The radiofrequency ablation catheter with the cooling function as claimed in claim 1, wherein the irrigation joint comprises a water inlet joint (141) and a water outlet joint (143), the cooling water cavity comprises a water inlet cavity (112) and a water outlet cavity (113) which are communicated, the water inlet end of the water inlet cavity (112) is communicated with the water inlet joint (141), and the water inlet end of the water outlet cavity (113) is communicated with the water outlet joint (143); the water inlet joint (141), the water inlet cavity (112), the water outlet cavity (113), the water inlet joint (141) and the perfusion device (3) form a cooling liquid circulation loop.

3. The radiofrequency ablation catheter with the cooling function as claimed in claim 1 or 2, wherein the ablation electrode (12) is a section of round tube on the catheter main body (11), perfusion micropores communicated with the cooling water cavity are formed in the ablation electrode (12), and the cooling liquid in the cooling water cavity can be sprayed out through the perfusion micropores.

4. The radiofrequency ablation catheter with cooling function of claim 3, wherein the ablation electrode (12) comprises at least one negative electrode (122) and at least two positive electrodes (121), any one of the negative electrodes (122) being located between two adjacent positive electrodes (121); gaps are reserved between the adjacent positive electrodes (121) and the adjacent negative electrodes (122), and each electrode is connected with an electrode lead (16).

5. The radiofrequency ablation catheter with cooling function of claim 2, wherein the distal end of the catheter body (11) is provided with one or more temperature sensors (15) for monitoring the operating temperature of the ablation electrode (12), and the lead wire connected to the temperature sensors (15) is connected to the ablation plug through the lead wire cavity (111).

6. The radiofrequency ablation catheter with the cooling function as recited in claim 5, wherein the catheter body (11) is provided with a guide wire cavity (111), an inlet water cavity (112) and an outlet water cavity (113); the lead wire cavity (111) is used for the electrode lead wire (16) and the temperature sensor (15) to connect the passing through of lead wire, the cross-section in lead wire cavity (111) is the thick appearance in middle of both ends, intake antrum (112) with go out water cavity (113) and be located respectively lead wire cavity (111) middle thin part's relative both sides.

7. The radiofrequency ablation catheter with cooling function of claim 1, wherein a guide wire cavity (114) for a guide wire to pass through is further arranged in the catheter body (11).

8. The radiofrequency ablation catheter with the cooling function as claimed in claim 5, wherein a guide wire cavity (114), two guide wire cavities (111), an inlet water cavity (112) and an outlet water cavity (113) are arranged in the catheter body (11); the lead cavity (111) is used for the electrode lead (16) and the temperature sensor (15) to be connected with the lead to pass through, and the guide wire cavity (114) is used for the guide wire to pass through; the guide wire cavity (114) is positioned in the middle of the catheter main body (11); the utility model discloses a lead wire chamber (111) is in the periphery in guide wire chamber (114), two lead wire chamber (111) symmetry sets up the relative both sides in guide wire chamber (114), intake antrum (112) go out water chamber (113), two lead wire chamber (111) encircle to be arranged lead wire chamber (114), two lead wire chamber (111) symmetry sets up lead wire chamber (111) other relative both sides.

9. The radiofrequency ablation catheter with cooling function of claim 1, characterized in that the catheter body (11) comprises an outer tube (11.1), an inner tube (11.2) and a water tube (11.3); outer tube (11.1) are used for providing support and cover and establish the periphery of inner tube (11.2), the inner chamber of inner tube (11.2) is wire guide chamber (114), outer tube (11.1) in with cavity between outer of inner tube (11.2) does lead wire chamber (111), water pipe (11.3) set up in lead wire chamber (111), the inner chamber of water pipe (11.3) is the cooling water chamber.

10. The radiofrequency ablation catheter with cooling function of claim 9, wherein the ablation electrode (12), the outer tube (11.1), and the water tube (11.3) are all adhesively fixed to the inner tube (11.2).

11. The radiofrequency ablation catheter with cooling function as claimed in claim 10, wherein the front end of the catheter body (11) is a tip structure with a bend or with a flexible guide wire or with a guide wire cavity, or the front end of the catheter body (11) is a section of spring hose; the spring hose and the tip structure are used to guide the course of the catheter body (11).

12. An endovascular intervention system with cooling function, comprising a radio frequency device (2), an infusion device (3) and a radio frequency ablation catheter with cooling function according to any one of claims 1 to 11, wherein the radio frequency device (2) is connected with an ablation plug of a control handle (14) on the radio frequency ablation catheter (1), and the infusion device (3) is connected with an infusion joint of the control handle (14) on the radio frequency ablation catheter (1).

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