CN215349403U - Ablation device and radio frequency ablation equipment - Google Patents

Abstract

The utility model provides an ablation device and radio frequency ablation equipment, wherein the ablation device comprises a first electrode assembly with a first electrode tip and a second electrode assembly with a second electrode tip, the first electrode tip comprises a first protective sheath, a suction positioning piece arranged on the first protective sheath, a first electrode and a filling piece arranged in the first protective sheath, so that the first protective sheath is positioned at a part to be ablated under the action of the suction positioning piece; at least a portion of the filler element is arranged to be expandable to press the first electrode towards the site to be ablated when the filler element is expanded; the second electrode tip comprises a second electrode, the second electrode is arranged opposite to the first electrode, and the part to be ablated, which is located between the first electrode and the second electrode, is ablated through the first electrode and the second electrode. The ablation device can solve the problem of non-ideal ablation effect of the ablation device in the prior art.

Description

Ablation device and radio frequency ablation equipment

Technical Field

The utility model relates to the field of medical instruments, in particular to an ablation device and radio frequency ablation equipment.

Background

Ablation is a common measure for treating atrial fibrillation, and the principle of ablation is to create one or more ablation lines in heart tissue, cause tissue necrosis, and cut off abnormal electrical signal conduction for treating atrial fibrillation.

The current ablation treatment is divided into surgical ablation and medical intervention ablation, the surgical ablation is characterized by good curative effect and low recurrence rate after operation, but the obvious defects are that the wound is large and the postoperative recovery is slow. Medical interventional ablation is favored by more and more patients because of small wound and fast recovery, but the medical ablation is point ablation, and the biggest defect is that a complete ablation line is difficult to form; and the single-side wall-attaching type ablation is carried out during ablation, the ablation depth is limited, the complete dehydration and denaturation of tissues from inside to outside are difficult to ensure, the ablation is not thorough when the ablation power is small in the operation, the power is high, the control is difficult, and the phenomena of excessive tissue necrosis, even burnthrough and burnout exist during ablation exist, so the success rate of the internal medicine interventional ablation is much lower than that of the surgery.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an ablation device and radio frequency ablation equipment, and aims to solve the problem that an internal medicine intervention type ablation device in the prior art is not ideal in ablation effect.

To achieve the above object, according to one aspect of the present invention, there is provided an ablation device including a first electrode assembly having a first electrode tip and a second electrode assembly having a second electrode tip, the first electrode tip including: a first protective sheath; a first electrode disposed within the first protective sheath; the suction positioning piece is arranged on the first protective sheath, so that the first protective sheath is positioned at the part to be ablated under the action of the suction positioning piece; a filler element disposed within the lumen of the first protective sheath, at least a portion of the filler element being arranged to be expandable to press the first electrode toward the site to be ablated upon expansion of the filler element; the second electrode tip comprises a second electrode, the second electrode is arranged opposite to the first electrode, and a part to be ablated, which is located between the first electrode and the second electrode, is ablated through the first electrode and the second electrode.

Further, the ablation device also includes an ablation circuit, with the first electrode and the second electrode each disposed on the ablation circuit to adjust the radio frequency energy between the first electrode and the second electrode by testing the impedance between the first electrode and the corresponding second electrode to perform ablation.

Further, the first protective sheath is strip-shaped, the first electrodes and the second electrodes are multiple, the multiple first electrodes and the multiple second electrodes are arranged in a mutually matched mode, and the multiple first electrodes are arranged at intervals along the extending direction of the first protective sheath.

Further, the first protective sheath is strip-shaped; the filler is in the shape of a strip and extends along the extension direction of the first protective sheath.

Furthermore, the suction positioning piece is of a sucker structure; and/or the filling member is of a balloon structure.

Furthermore, the first protective sheath is provided with an opening structure used for avoiding the first electrode, so that part of the structure of the first electrode extends out of the cavity of the first protective sheath through the opening structure.

Furthermore, the number of the first electrodes is multiple, the opening structure comprises multiple avoiding openings, the multiple avoiding openings and the multiple first electrodes are arranged in a one-to-one correspondence mode, and therefore partial structures of the first electrodes extend out of the first protection sheath through the corresponding avoiding openings; and/or the first electrodes are multiple, the open pore structure is a strip-shaped opening, the strip-shaped opening is spaced along the extending direction of the first protective sheath, and part of the structures of the multiple first electrodes extend out of the outer side of the first protective sheath through the strip-shaped opening.

Furthermore, an accommodating groove is formed in the inner wall of the first protective sheath, and when the filling piece is in a contraction state, the filling piece is accommodated in the accommodating groove; when the filling member is in the expanded state, at least part of the filling member is withdrawn from the receiving groove to press the first electrode toward the site to be ablated.

Further, the first electrode assembly further comprises a first magnetic member disposed within the first protective sheath; the second electrode assembly further includes a second magnetic member disposed at the second electrode tip, the first magnetic member and the second magnetic member cooperating to secure the first electrode tip and the second electrode tip relative to each other.

Furthermore, the first electrodes and the first magnetic members are all multiple, and the multiple first electrodes and the multiple first magnetic members are sequentially arranged in a staggered mode along the extending direction of the first protective sheath.

According to another aspect of the utility model, a radio frequency ablation apparatus is provided, which includes a radio frequency host and an ablation device connected to the radio frequency host.

By applying the technical scheme of the utility model, the ablation device comprises a first electrode assembly with a first electrode tip and a second electrode assembly with a second electrode tip, wherein the first electrode tip comprises a first protective sheath, an attraction positioning part arranged on the first protective sheath, a first electrode and a filling part which are arranged in the first protective sheath, so that the first protective sheath is positioned at a part to be ablated under the action of the attraction positioning part; the first electrode is extruded through the filling piece to move towards the part to be ablated, so that the first electrode can be attached to the inner wall of the first protective sheath, the outer wall of the first protective sheath at the corresponding position is attached to the corresponding part to be ablated, the first electrode can be enabled to act on the corresponding part to be ablated better, and the ablation effect is guaranteed; the second electrode tip comprises a second electrode arranged opposite to the first electrode so as to ablate the part to be ablated between the first electrode and the second electrode through the first electrode and the second electrode.

When the ablation instrument is used specifically, the first electrode assembly and the second electrode assembly are respectively used as an epicardial electrode and an endocardial electrode, so that the first electrode assembly and the second electrode assembly respectively act on the epicardium and the endocardium to achieve simultaneous ablation of the epicardium and the endocardium, and therefore good ablation effect is achieved. Therefore, the ablation device can solve the problem that the ablation effect of the ablation device in the prior art is not ideal.

In addition, the ablation device in the application can realize the internal and surgical hybrid ablation, the technical wound is small, the problems of large surgical ablation wound and slow recovery in the prior art are solved, meanwhile, the epicardium and the endocardium can be jointly and synchronously ablated, the output power is adjusted by testing the actual impedance between tissues, the ablation is accurate and safe, and the machine alarms and ablates after the impedance reaches a certain resistance value, so that excessive ablation is avoided.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic view of a first electrode assembly of an alternative ablation device in accordance with the present invention;

FIG. 2 illustrates a perspective internal block diagram of one embodiment of a first electrode assembly of the ablation device of FIG. 1;

FIG. 3 illustrates a cross-sectional view of a first electrode assembly of the ablation device of FIG. 2;

FIG. 4 illustrates a cross-sectional view of another embodiment of the first electrode assembly of the ablation device of FIG. 1;

FIG. 5 is a schematic view of the first electrode assembly of the ablation device of FIG. 1 showing the structure of the side eaves;

FIG. 6 illustrates a longitudinal cross-sectional view of the filler element of the first electrode assembly of the ablation device of FIG. 1;

FIG. 7 is a schematic view of a second electrode assembly of an alternative ablation device in accordance with the utility model;

FIG. 8 illustrates an enlarged partial view of the second electrode assembly of the ablation device of FIG. 7;

FIG. 9 shows an enlarged view of portion A of the second electrode assembly of the ablation device of FIG. 8;

fig. 10 is a schematic structural diagram of a radio frequency host of an alternative radio frequency ablation device in accordance with the present invention;

fig. 11 illustrates an assembly view between a radio frequency host and an ablation device of an alternative radio frequency ablation apparatus according to the present invention;

FIG. 12 is a schematic view of the ablation device of the present invention in ablation treatment of a site to be ablated;

FIG. 13 illustrates a fit between the first and second electrodes and the site to be ablated of an embodiment of the ablation device of the utility model;

FIG. 14 illustrates an ablation schematic of one state of the ablation device of the utility model;

fig. 15 shows an ablation schematic of another state of the ablation device of the utility model;

fig. 16 shows a wiring schematic between the rf main unit and the first and second electrode assemblies of the rf ablation device of the present invention;

FIG. 17 is a schematic structural view of a second embodiment of the first electrode assembly of the ablation device of the utility model;

fig. 18 is a schematic structural view of a second embodiment of the second electrode assembly of the ablation device of the utility model;

fig. 19 shows a mating view of the first and second electrodes of another embodiment of the ablation device of the utility model with tissue to be ablated.

Wherein the figures include the following reference numerals:

100. a first electrode assembly;

110. a first electrode tip; 111. a first electrode; 1110. an electrode surface; 1112. a cooling hole; 112. a first magnetic member; 113. a first protective sheath; 1130. protecting the sheath surface; 115. shielding the side eaves; 116. a filling member;

117. attracting the positioning piece; 1171. attracting the inner wall; 1172. attracting the outer wall; 1173. attracting the cavity;

1174. a first suction port; 1175. a second suction port; 1176. an air flow channel;

120. a wire laying groove;

200. a second electrode assembly;

210. a second electrode tip; 211. a second electrode; 212. a second magnetic member; 213. a developing member; 214. a second protective sheath;

310. a radio frequency host; 311. an ablation interface; 312. an electromagnetic interface; 313. a display screen; 320. an ablation circuit; 330. an ablation range; 340. the tissue is to be ablated.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 19, the ablation device includes afirst electrode assembly 100 having afirst electrode tip 110 and asecond electrode assembly 200 having asecond electrode tip 210, thefirst electrode tip 110 includes a firstprotective sheath 113, afirst electrode 111, a pull-inpositioning member 117, and a fillingmember 116, thefirst electrode 111 is disposed in the firstprotective sheath 113; thesuction positioning member 117 is arranged on the firstprotective sheath 113, so that the firstprotective sheath 113 is positioned at the part to be ablated by the action of thesuction positioning member 117; afiller 116 is disposed within the lumen of the firstprotective sheath 113, at least a portion of thefiller 116 being arranged to be expandable to press thefirst electrode 111 towards the site to be ablated when thefiller 116 is expanded; thesecond electrode tip 210 includes asecond electrode 211, and thesecond electrode 211 is disposed opposite to thefirst electrode 111, so that the ablation site located between thefirst electrode 111 and thesecond electrode 211 is ablated by thefirst electrode 111 and thesecond electrode 211.

In the ablation device of the present invention, which includes afirst electrode assembly 100 having afirst electrode tip 110 and asecond electrode assembly 200 having asecond electrode tip 210, thefirst electrode tip 110 includes a firstprotective sheath 113, a pull-inpositioning member 117 provided on the firstprotective sheath 113, and afirst electrode 111 and a fillingmember 116 provided in the firstprotective sheath 113, so that the firstprotective sheath 113 is positioned at a site to be ablated by the action of the pull-inpositioning member 117; the fillingpiece 116 is used for extruding thefirst electrode 111 to enable thefirst electrode 111 to move towards the part to be ablated, so that thefirst electrode 111 can be attached to the inner wall of the firstprotective sheath 113, and the outer wall of the firstprotective sheath 113 at the corresponding position is attached to the corresponding part to be ablated, so that thefirst electrode 111 can better act on the corresponding part to be ablated, and the ablation effect is guaranteed; thesecond electrode tip 210 includes asecond electrode 211 disposed opposite to thefirst electrode 111 to ablate a site to be ablated between thefirst electrode 111 and thesecond electrode 211 by thefirst electrode 111 and thesecond electrode 211.

In particular use, thefirst electrode assembly 100 and thesecond electrode assembly 200 are used as an epicardial electrode and an endocardial electrode, respectively, so that thefirst electrode assembly 100 and thesecond electrode assembly 200 act on the epicardium and the endocardium, respectively, to achieve simultaneous ablation of the epicardium and the endocardium, thereby achieving a good ablation effect. Therefore, the ablation device can solve the problem that the ablation effect of the ablation device in the prior art is not ideal.

In addition, the ablation device in the application can realize the internal and surgical hybrid ablation, the technical wound is small, the problems of large surgical ablation wound and slow recovery in the prior art are solved, meanwhile, the epicardium and the endocardium can be jointly and synchronously ablated, the output power is adjusted by testing the actual impedance between tissues, the ablation is accurate and safe, and the machine alarms and ablates after the impedance reaches a certain resistance value, so that excessive ablation is avoided.

Specifically, the ablation device further includes anablation circuit 320, and thefirst electrode 111 and thesecond electrode 211 are both disposed on theablation circuit 320 to adjust the radio frequency energy between thefirst electrode 111 and thesecond electrode 211 by testing the impedance between thefirst electrode 111 and the correspondingsecond electrode 211 to perform ablation.

In addition, thefirst electrode 111 and thesecond electrode 211 are arranged oppositely, so that the impedance between thefirst electrode 111 and thesecond electrode 211 can be tested in real time, the radio frequency power between thefirst electrode 111 and thesecond electrode 211 is adjusted according to the impedance between thefirst electrode 111 and thesecond electrode 211 which is detected in real time, and the machine alarm ablation is finished after the impedance reaches a certain resistance value, so that the excessive ablation is avoided, the problems that the ablation depth of the single side of the interventional ablation is limited, and the complete dehydration and denaturation of tissues from inside to outside are difficult to ensure in the prior art are solved, and the problem that the radio frequency power is not easy to control is solved at the same time.

In a specific ablation process, the impedance of the ablated tissue between the electrodes is changed from low to high; in the first stage of ablation, the impedance of the ablated tissue between the electrodes is gradually increased, and the radio frequency power is kept unchanged so as to accelerate the vibration of molecules in cells; in the second stage of ablation, along with the increase of the impedance of the ablated tissue between the electrodes, the radio frequency power is gradually increased, when the impedance of the ablated tissue between the electrodes is increased to the first preset value, the radio frequency power is also increased to the preset maximum value, and in the ablation stage, cells are rapidly dehydrated to generate irreversible change; in the third stage of ablation, along with the continuous increase of the impedance of the ablated tissue between the electrodes, the radio frequency power is gradually reduced so as to ensure the ablation thoroughness and prevent the phenomenon that the tissue surface is scabbed or a patient is injured due to the radio frequency high-power output; and prompting to end the ablation until the impedance of the ablated tissue between the electrodes is increased to a second preset value.

Alternatively, as shown in fig. 2 and 8, each of thefirst electrodes 111 and thesecond electrodes 211 is provided in plurality, and the plurality offirst electrodes 111 and the plurality ofsecond electrodes 211 are cooperatively disposed; by arranging the plurality offirst electrodes 111 and the plurality ofsecond electrodes 211, the plurality offirst electrodes 111 and the plurality ofsecond electrodes 211 can act on corresponding parts to be ablated at the same time, so that the ablation effect is ensured, and the ablation efficiency is improved; and the plurality offirst electrodes 111 are arranged at intervals, so that the mutual influence between two adjacentfirst electrodes 111 can be avoided. The plurality ofsecond electrodes 211 are arranged at intervals to avoid mutual influence between two adjacentsecond electrodes 211.

Specifically, as shown in fig. 2, the firstprotective sheath 113 is in the shape of a strip; the plurality offirst electrodes 111 are arranged at intervals along the extending direction of the firstprotective sheath 113; namely, a plurality offirst electrodes 111 act on the corresponding parts to be ablated simultaneously to form a complete ablation line.

Optionally, the firstprotective sheath 113 is tubular, and the plurality offirst electrodes 111 are each disposed within a lumen of the firstprotective sheath 113.

In the present embodiment, one structural form of the fillingmember 116 is: as shown in fig. 6, the fillingmember 116 has a strip shape, the firstprotective sheath 113 has a strip shape, and the fillingmember 116 extends in the extending direction of the firstprotective sheath 113. Specifically, the fillingmember 116 is a balloon structure to exert a pressing action on the plurality offirst electrodes 111 when the balloon structure is inflated.

In this embodiment, another structure of the fillingmember 116 is: the fillingmember 116 is plural, and theplural filling members 116 are arranged at intervals along the extending direction of the firstprotective sheath 113; the plurality of fillingmembers 116 and the plurality offirst electrodes 111 are arranged in a one-to-one correspondence manner, so that each fillingmember 116 can exert a squeezing action on the correspondingfirst electrode 111; each fillingmember 116 is disposed on a side of the correspondingfirst electrode 111 far from the portion to be ablated, so that when each fillingmember 116 presses the correspondingfirst electrode 111, eachfirst electrode 111 moves towards the corresponding portion to be ablated. Specifically, each of the fillingmembers 116 is of a balloon structure so as to exert a pressing action on the correspondingfirst electrode 111 when the balloon structure is inflated.

Specifically, theattraction positioning members 117 are arranged in pairs, and each pair ofattraction positioning members 117 work independently, so that the number of the attraction positioning members can be determined according to actual needs.

Specifically, thesuction positioning member 117 is a suction cup structure.

Specifically, as shown in fig. 3 and 4, theattraction positioning member 117 includes an attractioninner wall 1171 and an attractionouter wall 1172, anattraction cavity 1173, afirst attraction port 1174 and asecond attraction port 1175 communicated with theattraction cavity 1173 are formed between the attractioninner wall 1171 and the attractionouter wall 1172, and thefirst attraction port 1174 and thesecond attraction port 1175 have the same orientation.

The suctioninner wall 1171 and the suctioninner wall 1171 are both of a U-shaped structure, and the suctioninner wall 1171 and the suctionouter wall 1172 are arranged around the firstprotective sheath 113.

Theattraction positioning member 117 further includes anair flow channel 1176, and an air outlet end of theair flow channel 1176 is communicated with theattraction cavity 1173 so as to charge and exhaust air into theattraction cavity 1173 through theair flow channel 1176.

Optionally, thesuction positioning member 117 is plural.

In this embodiment, one arrangement of the plurality of pull-inpositioning members 117 is as follows: the plurality ofsuction positioning members 117 are arranged at intervals along the extending direction of the firstprotective sheath 113, so that the firstprotective sheath 113 is stably positioned on the portion to be ablated, and the positioning effect of the firstprotective sheath 113 is ensured.

In this embodiment, another arrangement of the plurality of pull-inpositioning members 117 is as follows: as shown in fig. 2, the plurality ofsuction positioning members 117 are arranged in pairs, and the twosuction positioning members 117 in pairs are respectively arranged on two opposite sides of the firstprotective sheath 113 to ensure that both sides of the firstprotective sheath 113 and the ablated tissue have good fitting degree, so that the correspondingfirst electrode 111 can better act on the corresponding ablated tissue to ensure the ablation effect.

The multiple pairs of theocclusion positioning pieces 117 are arranged at intervals along the extending direction of thefirst protection sheath 113, so that thefirst protection sheath 113 is stably positioned on a part to be ablated, the positioning effect of thefirst protection sheath 113 is ensured, and further the overall attaching degree between thefirst protection sheath 113 and the ablated tissue is ensured, so that eachfirst electrode 111 can better act on the corresponding ablated tissue, and the ablation effect is ensured.

Specifically, the firstprotective sheath 113 is provided with an opening structure for avoiding thefirst electrode 111, so that a part of the structure of thefirst electrode 111 extends out of the cavity of the firstprotective sheath 113 through the opening structure, and thus, the part of the electrode structure extending out of the cavity of the firstprotective sheath 113 can be in direct contact with the corresponding part to be ablated, so that the part of the electrode structure can better act on the corresponding part to be ablated, thereby further ensuring the ablation effect and improving the ablation efficiency.

In this embodiment, one arrangement of the open pore structure is: whenfirst electrode 111 is a plurality of, the trompil structure includes a plurality of trompils of dodging, and a plurality of trompils of dodging set up with a plurality offirst electrode 111 one-to-one to make the partial structure of eachfirst electrode 111 stretch out to the outside offirst protection sheath 113 through corresponding the trompil of dodging, and then make the partial structure homoenergetic of eachfirst electrode 111 who stretches out the outside offirst protection sheath 113 and corresponding treat that to melt the position direct contact.

In this embodiment, another arrangement form of the open pore structure is: the open pore structure is a strip-shaped opening, the strip-shaped openings are spaced along the extending direction of the firstprotective sheath 113, and a part of the structure of the plurality offirst electrodes 111 protrudes to the outside of the firstprotective sheath 113 through the strip-shaped openings.

In this embodiment, one way of disposing the fillingmember 116 is: an accommodating groove is formed in the inner wall of the firstprotective sheath 113, and when the fillingmember 116 is in a contracted state, the fillingmember 116 is accommodated in the accommodating groove; when the fillingmember 116 is in the expanded state, at least a portion of the fillingmember 116 escapes from the receiving recess to press thefirst electrode 111 toward the site to be ablated.

In this embodiment, another arrangement of the fillingmember 116 is as follows: thefirst electrode 111 and/or the firstmagnetic member 112 are provided with a positioning groove for accommodating the balloon structure, when the fillingmember 116 is in a contracted state, the fillingmember 116 is received in the positioning groove, and when the fillingmember 116 is in an expanded state, at least a part of the fillingmember 116 is pulled out of the positioning groove to press thefirst electrode 111 toward the site to be ablated.

Specifically, thefirst electrode assembly 100 further includes a firstmagnetic member 112, and the firstmagnetic member 112 is disposed within a firstprotective sheath 113.

Alternatively, each of thefirst electrodes 111 and the firstmagnetic members 112 is plural, and the pluralfirst electrodes 111 and the plural firstmagnetic members 112 are sequentially arranged in a staggered manner along the extending direction of the firstprotective sheath 113, so that the pluralfirst electrodes 111 are arranged at intervals, that is, the respective twofirst electrodes 111 are separated by each firstmagnetic member 112.

Optionally, the plurality of firstmagnetic members 112 are each disposed within the lumen of the firstprotective sheath 113.

Specifically, thefirst electrode 111 and/or the firstmagnetic member 112 are provided with a leadwire laying groove 120 for receiving a lead wire for connecting with thefirst electrode 111.

Specifically, thesecond electrode tip 210 includes a second protective sheath over which the plurality ofsecond electrodes 211 are sheathed.

Optionally, the second protective sheath is in a strip shape, and the plurality ofsecond electrodes 211 are arranged at intervals along the extending direction of the second protective sheath; namely, thesecond electrodes 211 act on the corresponding parts to be ablated at the same time to form a complete ablation line.

In this embodiment, thesecond electrode tip 210 includes a secondmagnetic member 212, and the firstmagnetic member 112 and the secondmagnetic member 212 cooperate to fix thefirst electrode tip 110 and thesecond electrode tip 210 relatively, so that thefirst electrode 111 of thefirst electrode tip 110 can be disposed opposite to the correspondingsecond electrode 211 of thesecond electrode tip 210.

Specifically, when there are a plurality of firstmagnetic members 112 and a plurality of secondmagnetic members 212, the plurality of firstmagnetic members 112 are disposed at intervals along the extending direction of thefirst electrode tip 110, and the plurality of secondmagnetic members 212 are disposed at intervals along the extending direction of thesecond electrode tip 210, so as to ensure the overall fixing effect between thefirst electrode tip 110 and thesecond electrode tip 210.

Specifically, each pair of the firstmagnetic member 112 and the secondmagnetic member 212 work independently, i.e. the number of the magnetic members can be determined according to actual requirements.

Optionally, the magnetic force of the magnetic part is controllable and adjustable, a small magnetic force is used during initial positioning, and a large magnetic force is used during final positioning, so that the inner electrode assembly and the outer electrode assembly are flexible during initial positioning and firm after final positioning, the fitting degree of the electrodes is guaranteed, and the ablation effect is guaranteed.

Optionally, the firstmagnetic member 112 is an electromagnet; and/or the secondmagnetic member 212 is an electromagnet.

Specifically, the plurality of firstmagnetic members 112 are disposed in the firstprotective sheath 113, and the plurality of firstmagnetic members 112 are disposed at intervals along the extending direction of the firstprotective sheath 113. Preferably, the plurality of firstmagnetic members 112 and the plurality offirst electrodes 111 are arranged to be staggered along the extending direction of the firstprotective sheath 113, so that the plurality offirst electrodes 111 are arranged at intervals, i.e., the respective twofirst electrodes 111 are separated by each firstmagnetic member 112.

In this embodiment, as shown in fig. 8 and 9, thesecond electrode tip 210 includes a secondprotective sheath 214, and thesecond electrode 211 is disposed on the secondprotective sheath 214; wherein thesecond electrode tip 210 includes a developingmember 213, and the developingmember 213 is disposed on the secondprotective sheath 214 to mark the position of thesecond electrode tip 210 by the developingmember 213; and/or, thesecond electrode 211 is made of a metal developing material including at least one of the following materials: platinum, platinum-iron alloy, tantalum, gold plated beryllium bronze; and/or the secondprotective sheath 214 is made of a developing material including barium sulfate (BaSO 4).

Specifically, the plurality of secondmagnetic members 212 are all sleeved on the second protective sheath, and the plurality of secondmagnetic members 212 are arranged at intervals along the extending direction of the secondprotective sheath 214. Preferably, the plurality of secondmagnetic members 212 are arranged to be staggered with the plurality ofsecond electrodes 211 along the extending direction of the second protective sheath, so that the plurality ofsecond electrodes 211 are arranged at intervals, i.e., the respective twosecond electrodes 211 are separated by each secondmagnetic member 212. In operation, each pair of the firstmagnetic member 112 and the secondmagnetic member 212 work independently, i.e. the number of the magnetic members can be determined according to actual requirements. The magnetic force of the magnetic part is controllable and adjustable, small magnetic force is used during initial positioning, and large magnetic force is used during final positioning, so that the inner electrode assembly and the outer electrode assembly are flexible during initial positioning, firm after final positioning, the fitting degree of the electrodes is guaranteed, and the ablation effect is guaranteed.

Alternatively, referring to fig. 13 and 19, the plurality of secondmagnetic elements 212 and the plurality ofsecond electrodes 211 are both ring-shaped structures, or polygonal, V-shaped, D-shaped, or arched cross-sectional structures. As shown in fig. 19, the cross section of thesecond electrode 211 is polygonal, and may be square.

Thevisualization member 213, thesecond electrode 211 having a visualization function, and the secondprotective sheath 214 having a visualization function in this embodiment can indicate the position when thesecond electrode assembly 200 enters the ablation site. Alternatively, the number of the developingmembers 213 on thesecond electrode tip 210 is 3 to 6, and may be separately provided or thesecond electrode 211 may have a developing function. The sheath outer walls of thevisualization element 213 and the secondprotective sheath 214 in this embodiment are flush to prevent injury to the patient during surgery.

In this embodiment, the developingmember 213 may be omitted, and the developingmember 213 may be plural, and the plural developingmembers 213 are provided at intervals along the extending direction of the secondprotective sheath 214; and/or, the outer surface of the secondprotective sheath 214 is divided into a first surface portion and a second surface portion, wherein the first surface portion corresponds to the developingmember 213, the second surface portion is connected with the first surface portion, the first surface portion is a concave structure, the developingmember 213 is sleeved on the first surface portion, and the outer surface of the developingmember 213 is flush with or lower than the second surface portion.

In operation, thefirst electrode assembly 100 is first fixed on the epicardium by the positioning member, then thesecond electrode assembly 200 enters the interior of the heart, thesecond electrode assembly 200 is placed in the endocardium at the position corresponding to thefirst electrode assembly 100 by the indication of the developingmember 213, and then the first pair of magnetic members, the second pair of magnetic members and the third pair of magnetic members at thefirst electrode tip 110 and thesecond electrode tip 210 are synchronously and sequentially turned on, and at this time, the two groups of electrodes complete the initial positioning. After the initial positioning is completed, the two electrode assemblies are opened in pairs, and the final positioning is completed.

Specifically, thefirst electrode 111 and thesecond electrode 211 are relatively independent in operation, i.e., the number of working electrodes can be controlled.

In the present embodiment, as shown in fig. 3, thefirst electrode 111 has anelectrode surface 1110 disposed toward the site to be ablated, and the firstprotective sheath 113 has aprotective sheath surface 1130 disposed toward the site to be ablated; wherein theelectrode surface 1110 is located on one side of theprotective sheath surface 1130 near the site to be ablated.

In the present embodiment, thefirst electrode 111 is a plurality offirst electrodes 111, and the plurality offirst electrodes 111 are arranged at intervals along the extending direction of thefirst electrode tip 110; the minimum distances between the electrode faces 1110 and the protective sheath faces 1130 of the plurality offirst electrodes 111 are all the same. The minimum distance between theelectrode surface 1110 of thefirst electrode 111 and theprotective sheath surface 1130 ranges from 0 mm to 0.5mm, and thefirst electrode 111 can be fully contacted with the ablated surface due to the height difference, so that the ablation effect is ensured. The height difference between theelectrode surface 1110 of thefirst electrode 111 and theprotective sheath surface 1130 is preferably 0.2 mm.

In this embodiment, theelectrode face 1110 and theprotective sheath face 1130 are both planar.

In order to achieve cooling of thefirst electrode tip 110, as shown in fig. 2, thefirst electrodes 111 are plural, and the pluralfirst electrodes 111 are arranged at intervals along the extending direction of thefirst electrode tip 110; at least onefirst electrode 111 of the plurality offirst electrodes 111 is provided with acooling hole 1112 for circulating a cooling fluid; and/or a cooling pipe for circulating cooling fluid is provided in the firstprotective sheath 113. The cooling holes 1112 are provided in the embodiment for local cooling during the ablation process, so as to protect other parts except the ablation part from being damaged. By providing cooling channels, cooling can be carried out at the side of the electrode.

In the present embodiment, at least onefirst electrode 111 of the plurality offirst electrodes 111 is provided with 1 to 4 cooling holes 1112. The number of cooling holes on eachfirst electrode 111 is 0-4 to ensure temperature control during ablation.

In this embodiment, the two opposite sides of the firstprotective sheath 113 are respectively provided with a shieldingside eaves 115 to form a shielding protection effect on thefirst electrodes 111 and the firstmagnetic members 112 inside the firstprotective sheath 113, so as to prevent blood and the like of the pericardial tissue from entering the region between the firstprotective sheath 113 and the epicardium in the ablation process and affecting the adhesion degree between the firstprotective sheath 113 and the epicardium, and prevent the measurement accuracy of the resistance value between thefirst electrode 111 and thesecond electrode 211 during ablation, thereby affecting the ablation effect. In addition, by arranging the shieldingside eaves 115, the liquid such as tissue fluid and physiological saline outside the ablation line can be shielded from entering the ablation part, so that the measurement precision of the resistance value between the first electrode and the second electrode during ablation is avoided, and the ablation effect is further influenced.

Alternatively, as shown in fig. 5, the shieldingside eaves 115 are strip-shaped, and the shieldingside eaves 115 extend along the extending direction of the firstprotective sheath 113.

The utility model also provides radio frequency ablation equipment, as shown in fig. 11, the radio frequency ablation equipment comprises aradio frequency host 310 and the ablation device, and the ablation device is connected with theradio frequency host 310.

Specifically, as shown in fig. 10, adisplay screen 313 is disposed on therf host 310, and thedisplay screen 313 is used for displaying the measured impedance and/or rf power of the ablated tissue between the two corresponding first andsecond electrodes 211.

Specifically, the rfmain unit 310 is further provided with anablation interface 311, each of thefirst electrode assembly 100 and thesecond electrode assembly 200 includes a plurality of lead assemblies, each lead assembly includes a lead connector and a plurality of parallel leads connected to the lead connector, and each lead is used for connecting to a corresponding electrode; theablation interface 311 has a first ablation interface portion having a plurality of first ablation interfaces for insertion of a plurality of wire connectors of thefirst electrode assembly 100 and a second ablation interface portion having a plurality of second ablation interfaces for insertion of a plurality of wire connectors of thesecond electrode assembly 200 to provide suitable radio frequency power to the respectivefirst electrodes 111 and the respectivesecond electrodes 211 through the respective first ablation interfaces and the respective second ablation interfaces.

Specifically, when the firstmagnetic member 112 and the secondmagnetic member 212 are both electromagnets, therf host 310 is further provided with anelectromagnetic interface 312, each of thefirst electrode assembly 100 and thesecond electrode assembly 200 includes a plurality of electromagnet assemblies, each of the electromagnet assemblies includes an electromagnetic joint and a plurality of electromagnetic wires connected to the electromagnetic joint and arranged in parallel, and each of the electromagnetic wires is used for being connected to a corresponding electromagnet; theelectromagnetic interface 312 has a first electromagnetic interface portion having a plurality of first magnetic interfaces for inserting the plurality of electromagnetic connectors of thefirst electrode assembly 100, and a second electromagnetic interface portion having a plurality of second magnetic interfaces for inserting the plurality of electromagnetic connectors of thesecond electrode assembly 200, so as to supply power to the corresponding firstmagnetic member 112 and the corresponding secondmagnetic member 212 through the respective first magnetic interfaces and the respective second magnetic interfaces, thereby generating attraction force between the corresponding firstmagnetic member 112 and the corresponding secondmagnetic member 212.

Referring to fig. 12 to 15, the ablation principle of the ablation device to the tissue to be ablated 340 in the present embodiment can be seen, and theablation range 330 of the ablation device can be embodied.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

in the ablation device of the present invention, which includes afirst electrode assembly 100 having afirst electrode tip 110 and asecond electrode assembly 200 having asecond electrode tip 210, thefirst electrode tip 110 includes a firstprotective sheath 113, a pull-inpositioning member 117 provided on the firstprotective sheath 113, and afirst electrode 111 and a fillingmember 116 provided in the firstprotective sheath 113, so that the firstprotective sheath 113 is positioned at a site to be ablated by the action of the pull-inpositioning member 117; the fillingpiece 116 is used for extruding thefirst electrode 111 to enable thefirst electrode 111 to move towards the part to be ablated, so that thefirst electrode 111 can be attached to the inner wall of the firstprotective sheath 113, and the outer wall of the firstprotective sheath 113 at the corresponding position is attached to the corresponding part to be ablated, so that thefirst electrode 111 can better act on the corresponding part to be ablated, and the ablation effect is guaranteed; thesecond electrode tip 210 includes asecond electrode 211 disposed opposite to thefirst electrode 111 to ablate a site to be ablated between thefirst electrode 111 and thesecond electrode 211 by thefirst electrode 111 and thesecond electrode 211.

In particular use, thefirst electrode assembly 100 and thesecond electrode assembly 200 are used as an epicardial electrode and an endocardial electrode, respectively, so that thefirst electrode assembly 100 and thesecond electrode assembly 200 act on the epicardium and the endocardium, respectively, to achieve simultaneous ablation of the epicardium and the endocardium, thereby achieving a good ablation effect. Therefore, the ablation device can solve the problem that the ablation effect of the ablation device in the prior art is not ideal.

In addition, the ablation device in the application can realize the internal and surgical hybrid ablation, the technical wound is small, the problems of large surgical ablation wound and slow recovery in the prior art are solved, meanwhile, the epicardium and the endocardium can be jointly and synchronously ablated, the output power is adjusted by testing the actual impedance between tissues, the ablation is accurate and safe, and the machine alarms and ablates after the impedance reaches a certain resistance value, so that excessive ablation is avoided.

The radio frequency ablation device comprises the ablation device, so that the radio frequency ablation device has at least the same technical effect as the ablation device.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. An ablation device comprising a first electrode assembly (100) having a first electrode tip (110) and a second electrode assembly (200) having a second electrode tip (210), the first electrode tip (110) comprising:

a first protective sheath (113);

a first electrode (111), the first electrode (111) being disposed within the first protective sheath (113);

the suction positioning piece (117) is arranged on the first protective sheath (113), so that the first protective sheath (113) is positioned at the part to be ablated under the action of the suction positioning piece (117);

a filler (116), the filler (116) being disposed within the lumen of the first protective sheath (113), at least a portion of the filler (116) being arranged to be expandable to press the first electrode (111) towards the site to be ablated when the filler (116) is expanded;

wherein the second electrode tip (210) comprises a second electrode (211), and the second electrode (211) is arranged opposite to the first electrode (111) so as to ablate the part to be ablated between the first electrode and the second electrode (211) through the first electrode and the second electrode (211).

2. The ablation device of claim 1, further comprising:

an ablation circuit (320), the first and second electrodes (211) each disposed on the ablation circuit (320) to adjust radio frequency energy between the first and second electrodes (111, 211) by testing impedance between the first and respective second electrodes (111, 211) to perform ablation.

3. The ablation device of claim 1, wherein the first protective sheath (113) is strip-shaped;

the first electrode (111) and the second electrode (211) are both multiple, the multiple first electrodes (111) and the multiple second electrodes (211) are cooperatively arranged, and the multiple first electrodes (111) are arranged at intervals along the extending direction of the first protection sheath (113).

4. The ablation device of claim 1, wherein the first protective sheath (113) is strip-shaped;

the filler (116) is strip-shaped, and the filler (116) extends along the extension direction of the first protective sheath (113).

5. The ablation device as in claim 1, wherein the suction positioning member (117) is a suction cup structure; and/or the filling member (116) is of a balloon structure.

6. The ablation device of claim 1, wherein the first protective sheath (113) is provided with an open structure for avoiding the first electrode (111) such that a portion of the first electrode (111) extends out of the lumen of the first protective sheath (113) through the open structure.

7. The ablation device of claim 6,

the number of the first electrodes (111) is multiple, the open pore structure comprises a plurality of avoiding open pores, the avoiding open pores are arranged in one-to-one correspondence with the first electrodes (111), so that part of the structure of each first electrode (111) extends out of the first protective sheath (113) through the corresponding avoiding open pores; and/or

The first electrodes (111) are multiple, the open pore structure is a strip-shaped opening, the strip-shaped opening is spaced along the extending direction of the first protection sheath (113), and partial structures of the multiple first electrodes (111) protrude to the outer side of the first protection sheath (113) through the strip-shaped opening.

8. The ablation device according to claim 1, characterized in that the inner wall of the first protective sheath (113) is provided with a receiving groove, the filler (116) being received in the receiving groove when the filler (116) is in the contracted state; when the filling member (116) is in an expanded state, at least part of the filling member (116) is withdrawn from the receiving recess to press the first electrode (111) towards the site to be ablated.

9. The ablation device of claim 1, wherein the first electrode assembly (100) further comprises a first magnetic member (112), the first magnetic member (112) being disposed within the first protective sheath (113); the second electrode assembly (200) further includes a second magnetic member (212) disposed at the second electrode tip (210), the first magnetic member (112) and the second magnetic member (212) cooperating to relatively secure the first electrode tip (110) and the second electrode tip (210).

10. The ablation device according to claim 9, wherein the first electrode (111) and the first magnetic member (112) are each provided in a plurality, and the plurality of first electrodes (111) and the plurality of first magnetic members (112) are sequentially arranged in a staggered manner along an extending direction of the first protective sheath (113).

11. An rf ablation apparatus comprising an rf host (310) and an ablation device connected to the rf host (310), wherein the ablation device is the ablation device of any one of claims 1 to 10.

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