CN215349404U

CN215349404U - Ablation device and radio frequency ablation equipment

Info

Publication number: CN215349404U
Application number: CN202120046540.9U
Authority: CN
Inventors: 周庆亮; 张海波; 王宇; 马志伟; 马帅; 孟坚
Original assignee: Beijing Medipeak Medical Technology Co ltd
Current assignee: Beijing Medipeak Medical Technology Co ltd; Beijing Med Zenith Medical Scientific Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-12-31
Anticipated expiration: 2031-01-08

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 first electrode and a first magnetic part which are arranged in the first protective sheath, and the second electrode tip comprises a second magnetic part which is matched with the first magnetic part so as to relatively fix the first electrode tip and the second electrode tip; the first protecting sheath is provided with a first avoiding opening for avoiding the first electrode and a second avoiding opening for avoiding the first magnetic part, part of the structure of the first electrode extends out of the first protecting sheath from the first avoiding opening, and part of the structure of the first magnetic part extends out of the first protecting sheath from the second avoiding opening; the ablation device solves the problem that the ablation effect of the ablation device in the prior art is not ideal.

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 operation is adopted 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 in the ablation, 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 problems that in the prior art, the ablation device is not firmly attached to a tissue to be ablated, the tissue to be ablated is easy to separate, and the ablation effect is not ideal.

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 first magnetic part is arranged in the first protective sheath; the second electrode tip comprises a second magnetic part, and the second magnetic part is matched with the first magnetic part so that the first electrode tip and the second electrode tip are relatively fixed; be provided with on the first protective sheath and be used for dodging the first dodging opening that dodges to first electrode and be used for dodging the second that first magnetic member dodges and dodge the opening, the partial structure of first electrode stretches out to the outside of first protective sheath by first dodging the opening, and the partial structure of first magnetic member is dodged the opening by the second and is stretched out to the outside of first protective sheath.

Furthermore, the first protective sheath is strip-shaped, the first magnetic parts and the second magnetic parts are multiple, and the multiple first magnetic parts and the multiple second magnetic parts are arranged in a mutually matched mode; the second dodges the opening and is a plurality of, and a plurality of second dodge openings set up with a plurality of first magnetic member one-to-one.

Further, the second electrode tip comprises a second electrode, the second electrode is arranged opposite to the first electrode, so that the part to be ablated, which is positioned between the first electrode and the second electrode, is ablated through the first electrode and the second electrode; the first electrodes and the second electrodes are multiple, and the multiple first electrodes and the multiple second electrodes are arranged in a mutually matched mode; the first avoidance openings are multiple, and the multiple first avoidance openings and the multiple first electrodes are arranged in a one-to-one correspondence mode.

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.

Furthermore, a lead laying groove for laying a lead is arranged on the first electrode and/or the first magnetic part, and the lead is used for being connected with the first electrode.

Furthermore, the ablation device comprises an attraction positioning part which 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 attraction positioning part.

Furthermore, the suction positioning piece is of a sucker structure.

Furthermore, the attraction positioning part comprises an attraction inner wall and an attraction outer wall, an attraction cavity, a first attraction port and a second attraction port are formed between the attraction inner wall and the attraction outer wall, and the first attraction port and the second attraction port are communicated with the attraction cavity.

Further, the first attraction port and the second attraction port are oriented in the same direction.

Furthermore, the suction inner wall and the suction inner wall are both of U-shaped structures, and the suction inner wall and the suction outer wall are arranged around the first protection sheath.

Further, the first protective sheath is made of a flexible material; and/or the first electrode terminal is a plurality of. Solves the problems of limited angle and inconvenient operation of the prior surgical instrument when in use.

According to another aspect of the utility model, a radio frequency ablation device is provided, which comprises a radio frequency host and the ablation device, wherein the ablation device is connected with the radio frequency host.

By applying the technical scheme, 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, a first electrode and a first magnetic part which are arranged in the first protective sheath, and the second electrode tip comprises a second magnetic part which is matched with the first magnetic part so that the first electrode tip and the second electrode tip are relatively fixed; the first protection sheath is provided with a first avoidance opening for avoiding the first electrode, so that when part of the structure of the first electrode extends out of the first avoidance opening to the outer side of the first protection sheath, the part of the electrode structure extending out of the first protection sheath can be contacted with the corresponding part to be ablated, so that the part of the electrode structure directly acts on the corresponding part to be ablated, meanwhile, the electrode structure positioned in the first protection sheath also acts on the corresponding part to be ablated, and therefore the first electrode can better act on the corresponding part to be ablated, the ablation effect is guaranteed, and the ablation efficiency is improved; the first protecting sheath is also provided with a second avoiding opening for avoiding the first magnetic part, part of the structure of the first magnetic part extends out of the first protecting sheath from the second avoiding opening, the part of the first magnetic part extending out of the first protecting sheath can be in direct contact with the part to be fixed, and meanwhile, the first magnetic part in the first protecting sheath is also matched with the part to be fixed, so that the positioning effect between the first protecting sheath and the part to be fixed is more stable, and the first electrode is favorably and stably ablated to ensure the 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.

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 is a schematic diagram showing the structural arrangement of the first electrode assembly of the ablation device of FIG. 1 with a filler element;

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 illustrates a schematic view of the ablation device of the present invention in ablating tissue to be ablated;

FIG. 13 illustrates a fit between the first and second electrodes and the tissue to be ablated of the ablation device of the present invention;

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 a first electrode assembly 100 having a first electrode tip 110 and a second electrode assembly 200 having a second electrode tip 210, wherein the first electrode tip 110 includes a first protective sheath 113, a first electrode 111 and a first magnetic member 112, and the first electrode 111 is disposed in the first protective sheath 113; the first magnetic member 112 is disposed within the first protective sheath 113; wherein the second electrode tip 210 comprises a second magnetic member 212, and the second magnetic member 212 cooperates with the first magnetic member 112 to fix the first electrode tip 110 and the second electrode tip 210 relatively; the first protection sheath 113 is provided with a first avoidance opening for avoiding the first electrode 111 and a second avoidance opening for avoiding the first magnetic member 112, a partial structure of the first electrode 111 extends out of the first protection sheath 113 from the first avoidance opening, and a partial structure of the first magnetic member 112 extends out of the first protection sheath 113 from the second avoidance opening.

In the ablation device of the present invention, the ablation device includes 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 includes a first protective sheath 113 and a first electrode 111 and a first magnetic member 112 disposed in the first protective sheath 113, the second electrode tip 210 includes a second magnetic member 212, and the second magnetic member 212 and the first magnetic member 112 cooperate to relatively fix the first electrode tip 110 and the second electrode tip 210; the first protection sheath 113 is provided with a first avoidance opening for avoiding the first electrode 111, so that when part of the structure of the first electrode 111 extends out of the first avoidance opening to the outer side of the first protection sheath 113, the part of the electrode structure extending out of the first protection sheath 113 can be contacted with the corresponding part to be ablated, so that the part of the electrode structure directly acts on the corresponding part to be ablated, meanwhile, the electrode structure in the first protection sheath 113 also acts on the corresponding part to be ablated, and therefore the first electrode 111 can better act on the corresponding part to be ablated, the ablation effect is guaranteed, and the ablation efficiency is improved; the first protecting sheath 113 is further provided with a second avoiding opening for avoiding the first magnetic part 112, part of the structure of the first magnetic part 112 extends out of the first protecting sheath 113 from the second avoiding opening, the part of the first magnetic part 112 extending out of the first protecting sheath 113 can be in direct contact with a part to be fixed, meanwhile, the first magnetic part 112 located in the first protecting sheath 113 is also matched with the part to be fixed, and therefore the positioning effect between the first protecting sheath 113 and the part to be fixed is more stable, and the first electrode 111 can be used for stably melting to ensure the melting effect; therefore, the ablation device can solve the problem that the ablation effect of the ablation device in the prior art is not ideal.

Specifically, as shown in fig. 2, the first protective sheath 113 has a strip shape.

Specifically, as shown in fig. 2 and 8, the first magnetic member 112 and the second magnetic member 212 are both multiple, and the multiple first magnetic members 112 and the multiple second magnetic members 212 are cooperatively disposed, so that each first magnetic member 112 and the corresponding second magnetic member 212 are engaged, and further, the fixing effect of the first electrode tip 110 and the second electrode tip 210 is stable.

The number of the second avoiding openings is multiple, and the multiple second avoiding openings and the multiple first magnetic members 112 are arranged in one-to-one correspondence, so that part of the structure of each first magnetic member 112 extends out of the corresponding second avoiding opening to the outer side of the first protective sheath 113.

Specifically, the second electrode tip 210 includes a second electrode 211, and the second electrode 211 is disposed opposite to the first electrode 111 to ablate a region to be ablated between the first electrode 111 and the second electrode 211 by the first electrode 111 and the second electrode 211.

Specifically, the ablation device further includes an ablation circuit 320, and the first electrode 111 and the second electrode 211 are both disposed on the ablation circuit 320 to adjust the radio frequency energy between the first electrode 111 and the second electrode 211 by testing the impedance between the first electrode 111 and the corresponding second electrode 211 to perform ablation.

In particular use, the first electrode assembly 100 and the second electrode assembly 200 are used as an epicardial electrode and an endocardial electrode, respectively, so that the first electrode assembly 100 and the second 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. 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.

In addition, the first electrode 111 and the second electrode 211 are arranged oppositely, so that the impedance between the first electrode 111 and the second electrode 211 can be tested in real time, the radio frequency energy between the first electrode 111 and the second electrode 211 is adjusted according to the impedance between the first electrode 111 and the second electrode 211 which is detected in real time to perform ablation, and the machine alarm is given to finish ablation after the impedance reaches a certain resistance value, so that excessive ablation is avoided, the problems that the ablation depth of the single side of the interventional ablation is limited, and complete dehydration and denaturation of tissues from inside to outside are difficult to ensure in the prior art are solved, and meanwhile, the problem that the radio frequency power is difficult to control is solved, the ablation is incomplete due to small power, the phenomena of excessive ablation, tissue necrosis, even burning through and burning leakage are caused by too large power.

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 the first electrodes 111 and the second electrodes 211 is multiple, and the multiple first electrodes 111 and the multiple second electrodes 211 are arranged in a one-to-one correspondence; by arranging the plurality of first electrodes 111 and the plurality of second electrodes 211, the plurality of first electrodes 111 and the plurality of second 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 of first electrodes 111 are arranged at intervals, so that the mutual influence between two adjacent first electrodes 111 can be avoided. The plurality of second electrodes 211 are arranged at intervals to avoid mutual influence between two adjacent second electrodes 211.

Specifically, the plurality of first electrodes 111 are arranged at intervals along the extending direction of the first protective sheath 113; namely, a plurality of first electrodes 111 act on the corresponding parts to be ablated simultaneously to form a complete ablation line.

Optionally, the first protective sheath 113 is tubular, and the plurality of first electrodes 111 and the plurality of first magnetic members 112 are disposed within the lumen of the first protective sheath 113.

Specifically, as shown in fig. 2, the plurality of first electrodes 111 and the plurality of first magnetic members 112 are sequentially arranged in a staggered manner along the extending direction of the first protective sheath 113, so that the plurality of first electrodes 111 are arranged at intervals, i.e., the respective two first electrodes 111 are separated by each first magnetic member 112.

Optionally, the number of the first avoiding openings is multiple, and the multiple first avoiding openings are arranged in one-to-one correspondence with the multiple first electrodes 111, so that part of the structure of each first electrode 111 protrudes from the corresponding first avoiding opening to the outside of the first protective sheath 113.

Specifically, the first avoidance opening and the second avoidance opening communicate to form a strip-shaped opening together.

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

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

In the present embodiment, the plurality of first magnetic members 112 are disposed at intervals along the extending direction of the first electrode tip 110, and the plurality of second magnetic members 212 are disposed at intervals along the extending direction of the second electrode tip 210, so as to ensure the overall fixing effect between the first electrode tip 110 and the second electrode tip 210.

Specifically, each pair of the first magnetic member 112 and the second magnetic 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 first magnetic member 112 is an electromagnet; and/or the second magnetic member 212 is an electromagnet.

In this embodiment, as shown in fig. 8 and 9, the second electrode tip 210 includes a second protective sheath 214, and the second electrode 211 is disposed on the second protective sheath 214; wherein the second electrode tip 210 includes a developing member 213, and the developing member 213 is disposed on the second protective sheath 214 to mark the position of the second electrode tip 210 by the developing member 213; and/or, the second 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 second protective sheath 214 is made of a developing material including barium sulfate BaSO 4.

Specifically, the plurality of second magnetic members 212 are all sleeved on the second protective sheath, and the plurality of second magnetic members 212 are arranged at intervals along the extending direction of the second protective sheath 214. Preferably, the plurality of second magnetic members 212 are arranged to be staggered with the plurality of second electrodes 211 along the extending direction of the second protective sheath, so that the plurality of second electrodes 211 are arranged at intervals, i.e., the respective two second electrodes 211 are separated by each second magnetic member 212. In operation, each pair of the first magnetic member 112 and the second magnetic 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 second magnetic elements 212 and the plurality of second 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 the second electrode 211 is polygonal, and may be square.

Specifically, the first electrode 111 and/or the first magnetic member 112 are provided with a lead laying groove 120 for accommodating a lead, which is used for connecting with the first electrode 111; alternatively, a wire-laying groove 120 for laying a wire is provided on the inner wall of the first protective sheath 113.

In this embodiment, the ablation device further comprises an engaging positioning member 117, and the engaging positioning member 117 is disposed on the first protective sheath 113, so that the first protective sheath 113 can be positioned at the site to be ablated by the action of the engaging positioning member 117.

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

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

Specifically, as shown in fig. 3 and 4, the attraction positioning member 117 includes an attraction inner wall 1171 and an attraction outer wall 1172, an attraction cavity 1173, a first attraction port 1174 and a second attraction port 1175 communicated with the attraction cavity 1173 are formed between the attraction inner wall 1171 and the attraction outer wall 1172, and the first attraction port 1174 and the second attraction port 1175 have the same orientation.

The suction inner wall 1171 and the suction inner wall 1171 are both of a U-shaped structure, and the suction inner wall 1171 and the suction outer wall 1172 are arranged around the first protective sheath 113.

In some embodiments, the first electrode 111 has an electrode face 1110 disposed toward the site to be ablated, and the first protective sheath 113 has a protective sheath face 1130 disposed toward the site to be ablated; wherein the electrode surface 1110 is located on one side of the protective sheath surface 1130 near the site to be ablated.

In some embodiments, the first electrode 111 is a plurality of first electrodes 111, and the plurality of first electrodes 111 are arranged at intervals along the extending direction of the first electrode tip 110; the minimum distances between the electrode faces 1110 and the protective sheath faces 1130 of the plurality of first electrodes 111 are all the same.

In some embodiments, both the electrode face 1110 and the protective sheath face 1130 are planar.

In some embodiments, the first electrode 111 is a plurality of first electrodes 111, and the plurality of first electrodes 111 are arranged at intervals along the extending direction of the first electrode tip 110; at least one first electrode 111 of the plurality of first electrodes 111 is provided with a cooling hole 1112 for circulating a cooling fluid; and/or a cooling pipe for circulating cooling fluid is provided in the first protective sheath 113.

In some embodiments, from 1 to 4 cooling holes 1112 are disposed on at least one first electrode 111 of the plurality of first electrodes 111.

In some embodiments, the second electrode tip 210 includes a second protective sheath 214, the second electrode 211 being disposed on the second protective sheath 214; wherein the second electrode tip 210 includes a developing member 213, and the developing member 213 is disposed on the second protective sheath 214 to mark the position of the second electrode tip 210 by the developing member 213; and/or, the second 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 second protective sheath 214 is made of a developer material having a composition that includes barium sulfate.

In some embodiments, the developing member 213 may not be provided, and the developing member 213 may be provided in plurality, and the plurality of developing members 213 are provided at intervals along the extending direction of the second protective sheath 214; and/or, the outer surface of the second protective sheath 214 is divided into a first surface portion and a second surface portion, wherein the first surface portion corresponds to the developing member 213, the second surface portion is connected with the first surface portion, the first surface portion is a concave structure, the developing member 213 is sleeved on the first surface portion, and the outer surface of the developing member 213 is flush with or lower than the second surface portion.

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

Optionally, the suction positioning member 117 is plural.

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

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

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

In this embodiment, the ablation device further includes a filling member 116, the filling member 116 is disposed in the cavity of the first protective sheath 113, and at least a portion of the filling member 116 is disposed in an expandable/contractible manner to exert a pressing action on the first electrode 111 when the filling member 116 is expanded, and to press a portion of the structure of the first electrode 111 out of the cavity of the first protective sheath 113 through the first bypass opening.

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

In the present embodiment, the first protective sheath 113 is made of a flexible material; and/or the first electrode tip 110 is plural.

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

In this embodiment, the two opposite sides of the first protective sheath 113 are respectively provided with a shielding side eaves 115 to form a shielding protection effect on the first electrodes 111 and the first magnetic members 112 inside the first protective sheath 113, so as to prevent blood and the like of the pericardial tissue from entering the region between the first protective sheath 113 and the epicardium in the ablation process and affecting the adhesion degree between the first protective sheath 113 and the epicardium, and prevent the measurement accuracy of the resistance value between the first electrode 111 and the second electrode 211 during ablation, thereby affecting the ablation effect. In addition, by arranging the shielding side 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 shielding side eaves 115 are strip-shaped, and the shielding side eaves 115 extend along the extending direction of the first protective sheath 113.

Optionally, the outer wall surface of the first protective sheath 113 is arc-shaped or polygonal.

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

In the present embodiment, the developing member 213 is plural, and the plural developing members 213 are provided at intervals along the extending direction of the second protective sheath 214; and/or, the outer surface of the second protective sheath 214 is divided into a first surface portion and a second surface portion, wherein the first surface portion corresponds to the developing member 213, the second surface portion is connected with the first surface portion, the first surface portion is a concave structure, the developing member 213 is sleeved on the first surface portion, and the outer surface of the developing member 213 is flush with or lower than the second surface portion.

In operation, the first electrode assembly 100 is first fixed on the epicardium by the positioning member, then the second electrode assembly 200 enters the interior of the heart, the second electrode assembly 200 is placed in the endocardium at the position corresponding to the first electrode assembly 100 by the indication of the developing member 213, and then the first pair of magnetic members, the second pair of magnetic members and the third pair of magnetic members at the first electrode tip 110 and the second 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, the first electrode 111 and the second electrode 211 are relatively independent when operated, i.e., the number of working electrodes can be controlled.

In the present embodiment, as shown in fig. 3, the first electrode 111 has an electrode surface 1110 disposed toward the site to be ablated, and the first protective sheath 113 has a protective sheath surface 1130 disposed toward the site to be ablated; wherein the electrode surface 1110 is located on one side of the protective sheath surface 1130 near the site to be ablated.

In the present embodiment, the first electrode 111 is a plurality of first electrodes 111, and the plurality of first electrodes 111 are arranged at intervals along the extending direction of the first electrode tip 110; the minimum distances between the electrode faces 1110 and the protective sheath faces 1130 of the plurality of first electrodes 111 are all the same. The minimum distance between the electrode surface 1110 of the first electrode 111 and the protective sheath surface 1130 ranges from 0 mm to 0.5mm, and the first 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 the electrode surface 1110 of the first electrode 111 and the protective sheath surface 1130 is preferably 0.2 mm.

In this embodiment, the electrode face 1110 and the protective sheath face 1130 are both planar.

In order to achieve cooling of the first electrode tip 110, as shown in fig. 2, the first electrodes 111 are plural, and the plural first electrodes 111 are arranged at intervals along the extending direction of the first electrode tip 110; at least one first electrode 111 of the plurality of first electrodes 111 is provided with a cooling hole 1112 for circulating a cooling fluid; and/or a cooling pipe for circulating cooling fluid is provided in the first protective 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 one first electrode 111 of the plurality of first electrodes 111 is provided with 1 to 4 cooling holes 1112. The number of cooling holes on each first electrode 111 is 0-4 to ensure temperature control during ablation.

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

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 the ablation range 330 of the ablation device can be embodied.

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

Specifically, the rf main unit 310 is further provided with an ablation interface 311, each of the first electrode assembly 100 and the second 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; the ablation interface 311 has a first ablation interface portion having a plurality of first ablation interfaces for insertion of a plurality of wire connectors of the first 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 the second electrode assembly 200 to provide suitable radio frequency power to the respective first electrodes 111 and the respective second electrodes 211 through the respective first ablation interfaces and the respective second ablation interfaces.

Specifically, when the first magnetic member 112 and the second magnetic member 212 are both electromagnets, the rf host 310 is further provided with an electromagnetic interface 312, each of the first electrode assembly 100 and the second 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; the electromagnetic interface 312 has a first electromagnetic interface portion having a plurality of first magnetic interfaces for inserting the plurality of electromagnetic connectors of the first electrode assembly 100, and a second electromagnetic interface portion having a plurality of second magnetic interfaces for inserting the plurality of electromagnetic connectors of the second electrode assembly 200, so as to supply power to the corresponding first magnetic member 112 and the corresponding second magnetic member 212 through the respective first magnetic interfaces and the respective second magnetic interfaces, thereby generating attraction force between the corresponding first magnetic member 112 and the corresponding second magnetic member 212.

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

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

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);

a first magnetic member (112), the first magnetic member (112) being disposed within the first protective sheath (113);

wherein the second electrode tip (210) comprises a second magnetic member (212), and the second magnetic member (212) and the first magnetic member (112) cooperate to relatively fix the first electrode tip (110) and the second electrode tip (210);

the first protection sheath (113) is provided with a first avoidance opening for avoiding the first electrode (111) and a second avoidance opening for avoiding the first magnetic part (112), a partial structure of the first electrode (111) extends to the outer side of the first protection sheath (113) through the first avoidance opening, and a partial structure of the first magnetic part (112) extends to the outer side of the first protection sheath (113) through the second avoidance opening.

2. The ablation device of claim 1, wherein the first protective sheath (113) is strip-shaped, the first magnetic member (112) and the second magnetic member (212) are provided in plurality, and the first magnetic member (112) and the second magnetic member (212) are cooperatively provided;

the number of the second avoidance openings is multiple, and the second avoidance openings and the first magnetic parts (112) are arranged in a one-to-one correspondence manner.

3. The ablation device of claim 1, wherein the second electrode tip (210) comprises a second electrode (211), the second electrode (211) being disposed opposite the first electrode (111) to ablate a site to be ablated located between the first and second electrodes (211) by the first and second electrodes (111, 211);

the first electrode (111) and the second electrode (211) are both multiple, and the multiple first electrodes (111) and the multiple second electrodes (211) are arranged in a mutually matched mode; the first avoidance openings are multiple, and the multiple first avoidance openings and the multiple first electrodes (111) are arranged in a one-to-one correspondence mode.

4. The ablation device of claim 3, further comprising:

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

5. The ablation device according to claim 1, characterized in that a wire laying groove (120) for laying a wire for connecting with the first electrode (111) is provided on the first electrode (111) and/or the first magnetic member (112).

6. The ablation device of claim 1, wherein the ablation device comprises:

the ablation device comprises an attraction positioning part (117), wherein the attraction positioning part (117) is arranged on the first protective sheath (113), so that the first protective sheath (113) is positioned at a part to be ablated through the action of the attraction positioning part (117).

7. The ablation device as in claim 6, wherein the engaging positioning member (117) is a suction cup structure.

8. The ablation device of claim 6, wherein the actuation positioning member (117) comprises an actuation inner wall (1171) and an actuation outer wall (1172), the actuation inner wall (1171) and the actuation outer wall (1172) forming therebetween an actuation cavity (1173), a first actuation port (1174) and a second actuation port (1175) communicating with the actuation cavity (1173).

9. The ablation device of claim 8, wherein the first engagement port (1174) and the second engagement port (1175) are oriented in the same direction.

10. The ablation device of claim 8, wherein the inner engagement wall (1171) and the inner engagement wall (1171) are both U-shaped, and the inner engagement wall (1171) and the outer engagement wall (1172) are disposed around the first protective sheath (113).

11. The ablation device of claim 1, wherein the first protective sheath (113) is made of a flexible material; and/or the number of the first electrode terminals (110) is multiple.

12. 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 11.