Electrode and ablation catheter

Abstract

The utility model relates to the technical field of medical instruments, and discloses an electrode and an ablation catheter, the electrode is used for the ablation catheter, the electrode comprises an electrode body, a notch is formed in the electrode body, the notch is formed in the second side face, making contact with blood, of the electrode body, and the ablation catheter is exposed through the notch. And the contact area between the electrode body and blood is reduced. On the basis, the contact area of the electrode body and the blood is limited, it is avoided that the electrode body makes contact with the blood to form a far-field signal, the far-field signal is detected out, and the ablation detection result is affected, and therefore the technical effect of improving the electrode ablation result detection accuracy is achieved. Meanwhile, by reducing the contact area between the electrode body and the blood, the ionization amount of the electrode body and the blood can be reduced, the amount of bubbles generated after the blood is ionized is reduced, the situation that the body health of a patient is affected due to the fact that the amount of the bubbles in the blood is too large is avoided, and therefore the technical effect of improving the use safety of the electrode is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, concretely relates to electrode and ablation catheter. BACKGROUND

[0002] Radio frequency ablation technology mainly relies on radio frequency therapeutic instrument with ablation and cutting function, and the treatment mechanism is mainly thermal effect. When radio frequency current flows through human body tissue, due to the rapid change of electromagnetic field, the water molecules with polarity in the tissue can move at high speed, and heat (i.e. endogenous thermal effect) is generated, which causes the water evaporation, drying, shrinkage and sterile necrosis of cells, so as to achieve the purpose of treatment.

[0003] The radio frequency ablation catheter comprises:

[0004] An insulating body;

[0005] A plurality of electrode units are arranged at the outer side of the insulating body in intervals, and high-voltage pulses are released to the target tissue through the electrode body to ablate the lesions of the target tissue. When the electrode body contacts the lesions, potential change occurs, but when the electrode body contacts the target tissue, potential change does not occur.

[0006] A microelectrode array can display the potential change of the electrode body. When the electrode body contacts the lesions, potential change occurs, forming a far-field signal, so that the microelectrode array receives the far-field signal. After the lesions are ablated, the electrode body contacts the target tissue, and the electrode body does not produce potential change, and the microelectrode array does not receive the far-field signal.

[0007] However, during this process, one side of the electrode body contacts blood, and at this time, the electrode body still produces potential change, that is, after the lesions are completely ablated, the microelectrode array still receives the far-field signal, which affects the accuracy of the doctor's judgment of the ablation result of the lesions. UTILITARY MODEL CONTENT

[0008] Therefore, the utility model provides an electrode and an ablation catheter to solve the problem that the microelectrode array still detects the far-field signal generated between the electrode body and blood after the lesions are completely ablated by the existing electrode body, which affects the accuracy of the doctor's judgment of the ablation result of the lesions.

[0009] In the first aspect, the utility model provides an electrode for an ablation catheter, and the electrode comprises:

[0010] The electrode body is arranged in a hollow annular structure, and two ends of the electrode body are respectively provided with openings for sleeving the electrode body outside the ablation catheter. A first side of the electrode body is used for contacting a lesion of a target tissue, and a second side of the electrode body is used for contacting blood. The second side is provided with at least one notch for exposing the ablation catheter to the blood.

[0011] Beneficial effects: By arranging the notch on the electrode body and arranging the notch on the second side of the electrode body in contact with the blood, the ablation catheter is exposed through the notch, and the contact area between the electrode body and the blood is reduced. Based on this, the contact area between the electrode body and the blood is limited, avoiding the formation of a far-field signal by the contact between the electrode body and the blood, which is detected and affects the detection result of ablation, thereby achieving the technical effect of improving the accuracy of electrode ablation result detection. At the same time, by reducing the contact area between the electrode body and the blood, the ionization amount of the electrode body and the blood can be reduced, the amount of bubbles generated after the blood is ionized can be reduced, and the situation that the amount of bubbles in the blood is too much to affect the health of the patient can be avoided, thereby achieving the technical effect of improving the safety of the electrode.

[0012] In an optional embodiment, the boundary line of the notch includes at least four edge lines.

[0013] Beneficial effects: By limiting the number of boundary lines of the notch, the positions of the edge lines can be adjusted as needed to increase the area of the notch, thereby achieving the technical effect of reducing the contact area between the second side and the blood.

[0014] In an optional embodiment, the boundary line of the notch includes four edge lines, and the four edge lines include:

[0015] A first edge line arranged to extend in parallel to the axial direction of the electrode body, the first edge line being a straight line;

[0016] A second edge line arranged to extend in the circumferential direction of the electrode body, one end of the second edge line being connected to one end of the first edge line;

[0017] A third edge line arranged to extend in parallel to the axial direction of the electrode body, the third edge line being spaced apart from the first edge line, one end of the third edge line being connected to the other end of the second edge line, and the third edge line being a straight line;

[0018] A fourth edge line arranged to extend in the circumferential direction of the electrode body, one end of the fourth edge line being connected to the other end of the third edge line, and the other end of the fourth edge line being connected to the other end of the first edge line.

[0019] Beneficial effects: by limiting the number of boundary lines to four, not only can it ensure that the second side surface does not form a far-field signal in contact with the blood, but the setting of the four edge lines can also reduce the difficulty of forming the notch, thereby achieving the technical effect of improving the design simplicity of the electrode.

[0020] In an alternative embodiment, the second edge line is an arc line;

[0021] And / or, the fourth edge line is an arc line.

[0022] Beneficial effects: by limiting the second edge line and the fourth edge line to be arc lines, it is convenient to adjust the shape of the second edge line and the fourth edge line as needed, so that the second edge line and the fourth edge line not only do not extend to the first side surface, affecting the ablation of the lesion, but also can achieve the technical effect of reducing the contact area between the second side surface and the blood.

[0023] In an alternative embodiment, the convex direction of the center point of the second edge line relative to the end point of the second edge line is opposite to the convex direction of the center point of the fourth edge line relative to the end point of the fourth edge line, and the convex direction of the second edge line is set away from the fourth edge line;

[0024] And / or, the second edge line and the fourth edge line are intersecting lines.

[0025] Beneficial effects: by limiting the convex direction of the second edge line and the fourth edge line, the area of the notch can be increased, thereby achieving the technical effect of reducing the contact area between the second side surface and the blood.

[0026] By limiting the second edge line and the fourth edge line to be intersecting lines, the electrode can be cut by an intersecting line cutting machine to form the second edge line and the fourth edge line, thereby achieving the technical effect of improving the simplicity of processing the second edge line and the fourth edge line.

[0027] In an alternative embodiment, the first edge line includes a plurality of first points, the third edge line includes a plurality of second points, and the first points and the second points are arranged one-to-one;

[0028] The line connecting the first point and the corresponding second point is parallel to the line connecting the midpoint of the first edge line and the midpoint of the third edge line, and the arc length of the line connecting the first point and the corresponding second point in the circumferential direction of the electrode body is not greater than half the outer circumference of the electrode body.

[0029] Beneficial effects: by limiting the distance between the first point and the second point, the gap can be prevented from extending to the first side, so that the electrode cannot ablate the lesion, thereby achieving the technical effect of improving the completeness of the electrode ablation of the lesion.

[0030] In an alternative embodiment, the included angle between adjacent edge lines is an obtuse angle or a circular arc chamfer.

[0031] Beneficial effects: by limiting the included angle between adjacent edge lines to an obtuse angle or a circular arc chamfer, the sharpness of the corner position connecting adjacent edge lines can be reduced, and the occurrence of sharp discharge at the corner position can be avoided, thereby affecting the health of the patient.

[0032] In an alternative embodiment, along the development direction of the electrode body, the area of the gap is not less than one-third of the area of the electrode body.

[0033] And / or, the gap is provided with one.

[0034] Beneficial effects: by limiting the area relationship between the gap and the electrode body, the contact area between the second side and the blood can be reduced, so that the second side cannot form a far-field signal with the blood, thereby improving the accuracy of the ablation result detection of the electrode.

[0035] Compared to the gap interval provided with two or more, by providing the gap with one without setting the interval, the area of the gap can be improved, thereby reducing the connection area between the second side and the blood.

[0036] In a second aspect, the utility model also provides an ablation catheter, comprising:

[0037] An insulating body;

[0038] The electrode described above, the electrode body in the electrode is provided outside the insulating body through the opening.

[0039] Beneficial effects: because the ablation catheter includes an electrode, it has the same effect as the electrode, which is not described here.

[0040] In an alternative embodiment, the ablation catheter comprises:

[0041] A detection unit in communication with the electrode body for detecting the far-field signal formed by the contact between the electrode body and the lesion;

[0042] And / or, a pulse unit electrically connected to the electrode body.

[0043] Beneficial effect: when the detection unit detects the far field signal, it proves that the lesion is not completely ablated, and when the detection unit cannot detect the far field signal, it proves that the lesion is completely ablated.

[0044] The pulse unit is used to realize power supply to the electrode body, so that high-voltage pulses are released between adjacent electrode bodies, so as to realize ablation of the lesion. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0046] Figure 1 It is a structure schematic view of the electrode in the embodiment;

[0047] Figure 2 It is a front view of the electrode in the embodiment;

[0048] Figure 3 It is a bottom view of Figure 2 ;

[0049] Figure 4 It is a side view of Figure 2 ;

[0050] Figure 5 It is a front view of the ablation catheter in the embodiment.

[0051] BRIEF DESCRIPTION OF DRAWINGS

[0052] 1, insulating body;

[0053] 2, electrode body; 201, first side; 202, second side;

[0054] 203, notch; 2031, first edge line; 2032, second edge line; 2033, third edge line; 2034, fourth edge line. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0056] The embodiments of the present application are described below Figures 1 to 5 in conjunction with

[0057] According to the embodiments of the present application, on the one hand, an electrode is provided for an ablation catheter, the electrode comprising:

[0058] The electrode body 2 is arranged in a hollow annular structure, and the two ends of the electrode body 2 have openings, respectively, for sleeving the electrode body 2 outside the ablation catheter, the first side surface 201 of the electrode body 2 is used for contacting the lesion of the targeted tissue, and the second side surface 202 is used for contacting the blood, and the second side surface 202 is provided with at least one notch 203 for exposing the ablation catheter to contact with the blood.

[0059] In the electrode of the present embodiment, by arranging the notch 203 on the electrode body 2 and arranging the notch 203 on the second side surface 202 of the electrode body 2 in contact with the blood, the ablation catheter is exposed through the notch 203, and the contact area between the electrode body 2 and the blood is reduced. Based on this, the contact area between the electrode body 2 and the blood is limited, which avoids the formation of far-field signals by the contact between the electrode body 2 and the blood, so that the detection result of ablation is affected, thereby achieving the technical effect of improving the accuracy of electrode ablation result detection. At the same time, by reducing the contact area between the electrode body 2 and the blood, the ionization amount of the electrode body 2 and the blood can be reduced, the amount of bubbles generated after the blood is ionized can be reduced, and the situation that the amount of bubbles in the blood is too much to affect the health of the patient can be avoided, thereby achieving the technical effect of improving the safety of the electrode.

[0060] Further, since the first side surface 201 contacts the lesion and the targeted tissue, and the second side surface 202 contacts the blood, and compared with the lesion and the targeted tissue, the electrical conductivity of the blood is higher, about 5 times the electrical conductivity of the former lesion and the targeted tissue, and the calculation formula of the current density is as follows:

[0061] J = σ × E

[0062] Wherein, J represents the current density, σ represents the electrical conductivity, and E represents the electric field intensity.

[0063] According to the above formula, when the electric field strength of the first side 201 and the second side 202 is the same, when the electrode body 2 is energized, the current density of the second side 202 is greater. This causes the current to flow towards the second side 202 in related technologies, thus affecting the ablation efficiency of the first side 201 on the lesion. In this embodiment, by setting the notch 203, the area of ​​the second side 202 can be reduced. Based on this, the amount of current flowing through the second side 202 is reduced, allowing more current to flow towards the first side 201, increasing the electric field distribution of the first side 201, that is, increasing the electric field strength of the first side 201, thereby increasing the current density flowing through the first side 201, and thus achieving the technical effect of improving the ablation efficiency of the first side 201 on the lesion.

[0064] In addition, the boundary line of the notch 203 includes at least four edge lines. Based on this, the position of each edge line can be adjusted as needed to increase the area of ​​the notch 203, thereby achieving the technical effect of reducing the contact area between the second side 202 and the blood.

[0065] Among them, combined Figure 1 and Figure 3 As shown, in this embodiment, the boundary line of the gap 203 includes four edge lines, which include:

[0066] The first edge line 2031 extends along the axial direction parallel to the electrode body 2, and the first edge line 2031 is a straight line;

[0067] The second edge line 2032 extends circumferentially along the electrode body 2, and one end of the second edge line 2032 is connected to one end of the first edge line 2031.

[0068] The third edge line 2033 extends along the axial direction parallel to the electrode body 2. The third edge line 2033 is spaced apart from the first edge line 2031. One end of the third edge line 2033 is connected to the other end of the second edge line 2032. The third edge line 2033 is a straight line.

[0069] The fourth edge line 2034 extends circumferentially along the electrode body 2. One end of the fourth edge line 2034 is connected to the other end of the third edge line 2033, and the other end is connected to the other end of the first edge line 2031.

[0070] Of course, in other embodiments, the first edge line 2031 and the third edge line 2033 can be arcs, that is, along... Figure 3In the horizontal direction shown, the positions of the two ends of the first edge line 2031 and the positions of the two ends of the third edge line 2033 are unchanged, and the convex directions of the arcs of the first edge line 2031 and the third edge line 2033 are arranged in opposite directions, that is, the convex direction of the arc of the first edge line 2031 is arranged downward, and the convex direction of the arc of the second edge line 2032 is arranged upward. Compared with other embodiments, the notch 203 formed by the first edge line 2031 and the third edge line 2033 in this embodiment has a larger area, thereby achieving the technical effect of reducing the contact area between the second side surface 202 and the blood.

[0071] In other embodiments, the setting direction of the arc of the first edge line 2031 and the third edge line 2033 can also be that the arc of the first edge line 2031 and the third edge line 2033 are arranged in the same direction. Figure 3 In the horizontal direction shown, the positions of the two ends of the first edge line 2031 and the positions of the two ends of the third edge line 2033 are unchanged, and the convex directions of the arcs of the first edge line 2031 and the third edge line 2033 are arranged in opposite directions, that is, the convex direction of the arc of the first edge line 2031 is arranged downward, and the convex direction of the arc of the second edge line 2032 is arranged upward. Compared with other embodiments, the notch 203 formed by the first edge line 2031 and the third edge line 2033 in this embodiment has a larger area, thereby achieving the technical effect of reducing the contact area between the second side surface 202 and the blood.

[0072] In other embodiments, there can be more than four edge lines. Compared with other embodiments, the number of edge lines in this embodiment can not only ensure that the contact area between the second side surface 202 and the blood does not form a far-field signal, but also the arrangement of the four edge lines can reduce the difficulty of forming the notch 203, thereby achieving the technical effect of improving the design simplicity of the electrode.

[0073] In other embodiments, there can be fewer than four edge lines, which is not limited here.

[0074] In addition, in combination with the above description of the first edge line 2031 and the third edge line 2033, the second edge line 2032 and the fourth edge line 2034 can also be arranged in the same way. Figure 3 As shown, in this embodiment, the second edge line 2032 is an arc, and the fourth edge line 2034 is an arc. Based on this, it is convenient to adjust the shapes of the second edge line 2032 and the fourth edge line 2034 as needed, so that the second edge line 2032 and the fourth edge line 2034 neither extend to the first side surface 201 to affect the ablation of the lesion, nor achieve the technical effect of reducing the contact area between the second side surface 202 and the blood.

[0075] Further, the second edge line 2032 and the fourth edge line 2034 are intersecting lines. Based on this, the electrode can be cut by an intersecting line cutting machine to form the second edge line 2032 and the fourth edge line 2034, so as to achieve the technical effect of improving the convenience of processing the second edge line 2032 and the fourth edge line 2034. As a changeable embodiment, the second edge line 2032 and the fourth edge line 2034 can also be other forms of arc shapes.

[0076] Preferably, the convex direction of the center point of the second edge line 2032 relative to the end point of the second edge line 2032 is opposite to the convex direction of the center point of the fourth edge line 2034 relative to the end point of the fourth edge line 2034, and the convex direction of the second edge line 2032 is set as a direction away from the fourth edge line 2034, that is, the second edge line 2032 is set as an arc line that is convex to the right, and the fourth edge line 2034 is set as an arc line that is convex to the left. Figure 3 As shown in the figure, the arc line convex direction of the second edge line 2032 is set to the right, and the arc line convex direction of the fourth edge line 2034 is set to the left.

[0077] Of course, in other embodiments, the arc line convex direction of the second edge line 2032 and the arc line convex direction of the fourth edge line 2034 are set to be opposite, that is, the second edge line 2032 is set as an arc line that is convex to the left, and the fourth edge line 2034 is set as an arc line that is convex to the right. Figure 3 As shown in the figure, the arc line convex direction of the second edge line 2032 is set to the right, and the arc line convex direction of the fourth edge line 2034 is set to the left. Compared with other embodiments, the arc line convex direction of the second edge line 2032 and the fourth edge line 2034 in this embodiment can increase the area of the notch 203, so as to achieve the technical effect of reducing the contact area between the second side surface 202 and the blood.

[0078] In other embodiments, only the second edge line 2032 can be limited to an arc line, or only the fourth edge line 2034 can be limited to an arc line, which are all within the protection scope of this embodiment.

[0079] In other embodiments, only the convex direction of the center point of the second edge line 2032 relative to the end point of the second edge line 2032 is opposite to the convex direction of the center point of the fourth edge line 2034 relative to the end point of the fourth edge line 2034, and the convex direction of the second edge line 2032 is set as a direction away from the fourth edge line 2034, or only the second edge line 2032 and the fourth edge line 2034 are set as intersecting lines.

[0080] In other embodiments, the second edge line 2032 and the fourth edge line 2034 can not be arc lines, and the shape of the second edge line 2032 and the fourth edge line 2034 can be adjusted according to the needs of the electrode.

[0081] In addition, in the embodiment, the first edge line 2031 includes a plurality of first points, and the third edge line 2033 includes a plurality of second points, the first points and the second points are arranged in one-to-one correspondence.

[0082] The line between the first point and the corresponding second point is parallel to the line between the midpoint of the first edge line 2031 and the midpoint of the third edge line 2033, and the arc length of the line between the first point and the corresponding second point in the circumferential direction of the electrode body 2 is equal to half of the outer circumferential length of the electrode body 2. Based on this, the gap 203 can be prevented from extending to the first side surface 201, so that the electrode cannot ablate the lesion, thereby achieving the technical effect of improving the completeness of the electrode ablation of the lesion.

[0083] As a convertible embodiment, the arc length of the line between the first point and the corresponding second point can be less than half of the outer circumferential length of the electrode body 2.

[0084] In addition, in the embodiment, the included angle between adjacent edge lines is obtuse, so that the electrode body 2 is arranged along the direction of the blood flow, and the blood flow is not blocked by the electrode body 2. Figure 2 The cross section shown is a trapezoid. Based on this, the sharpness of the corner position connected between adjacent edge lines can be reduced, and the occurrence of sharp discharge at the corner position can be avoided, thereby affecting the health of the patient.

[0085] Preferably, the included angle between adjacent edge lines is a circular arc chamfer. At this time, the included angle between adjacent edge lines can not be limited, and the technical effect of reducing the sharpness of the corner position connected between adjacent edge lines can also be achieved. As a convertible embodiment, the included angle between adjacent edge lines can be limited to be only obtuse, or the included angle between adjacent edge lines can be limited to be only a circular arc chamfer.

[0086] In addition, in the embodiment, the area of the gap 203 is greater than one-third of the area of the electrode body 2 in the development direction of the electrode body 2. Based on this, the contact area between the second side surface 202 and the blood can be reduced, so that the second side surface 202 cannot form a far-field signal with the blood, thereby achieving the technical effect of improving the accuracy of the detection of the ablation result of the electrode.

[0087] As a convertible embodiment, the area of the opening can be equal to one-third of the area of the electrode body 2.

[0088] In addition, in the embodiment, the gap 203 is provided with one. Of course, in other embodiments, the gap 203 can be provided with two or more along the development direction of the electrode body 2. Figure 3Two or more gaps 203 are arranged at intervals in the vertical direction as shown, and the shapes of the two or more gaps 203 can be the same or different. Compared with other embodiments, in this embodiment, one gap 203 is arranged without an interval, so that the area of the gap 203 is increased, thereby achieving the technical effect of reducing the connection area between the second side surface 202 and the blood.

[0089] Of course, in other embodiments, the number of gaps 203 can be adjusted as needed according to the design of the electrode.

[0090] In other embodiments, according to the design of the ablation catheter, only the area of the gap 203 is greater than one third of the area of the electrode body 2 along the deployment direction of the electrode body 2, or only one gap 203 is arranged.

[0091] According to an embodiment of the utility model, on the other hand, an ablation catheter is also provided, comprising:

[0092] The insulating body 1;

[0093] The electrode, the electrode body 2 is arranged on the outside of the insulating body 1 through the opening.

[0094] In addition, in this embodiment, the number of electrode bodies 2 is in the range of 4-10, which facilitates increasing the ablation speed of the lesion.

[0095] Of course, in other embodiments, the number of electrode bodies 2 can be adjusted according to the design of the ablation catheter.

[0096] In addition, in combination with Figure 5 As shown, in this embodiment, the insulating body 1 is annular. Of course, in other embodiments, according to the design of the ablation catheter, the insulating body 1 can be linear.

[0097] In addition, the ablation catheter comprises:

[0098] The detection unit is in communication connection with the electrode body 2, and is used for detecting the far-field signal formed by the contact between the electrode body 2 and the lesion, that is, when the detection unit detects the far-field signal, it proves that the lesion has not been completely ablated, and when the detection unit cannot detect the far-field signal, it proves that the lesion has been completely eliminated. Wherein, the communication connection is a mature technology, which is not limited here.

[0099] The pulse unit is in electrical connection with the electrode body 2, and the power supply to the electrode body 2 is realized through the pulse unit, so that high-voltage pulses are released between adjacent electrode bodies 2, thereby realizing the ablation of the lesion.

[0100] Preferably, the pulse unit is connected in parallel with the plurality of electrode bodies 2. Based on this, when one electrode body 2 fails, the remaining electrode bodies 2 can continue to be used, thereby achieving the technical effect of improving the reliability of use of the ablation catheter. As a convertible embodiment, the pulse unit can also be connected in series with the plurality of electrode bodies 2.

[0101] Of course, in other embodiments, depending on the ablation catheter, only the detection unit can be provided, or only the detection unit can be provided.

[0102] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes are within the scope defined by the appended claims.

Claims

1. An electrode for use in an ablation catheter, characterized by, The electrode comprises: an electrode body (2) arranged in a hollow annular structure, two ends of the electrode body (2) are respectively provided with openings for sleeving the electrode body (2) outside the ablation catheter, a first side surface (201) of the electrode body (2) is used for contacting a lesion of a target tissue, and a second side surface (202) is used for contacting blood, the second side surface (202) is provided with at least one notch (203) for exposing the ablation catheter to contact with the blood.

2. The electrode of claim 1, wherein The boundary line of the notch (203) comprises at least four edge lines.

3. The electrode of claim 2, wherein The boundary line of the notch (203) comprises four edge lines, and the four edge lines comprise: a first edge line (2031) arranged along the axial extension of the electrode body (2), the first edge line (2031) is a straight line; a second edge line (2032) arranged along the circumferential extension of the electrode body (2), one end of the second edge line (2032) is connected with one end of the first edge line (2031); a third edge line (2033) arranged along the axial extension of the electrode body (2), the third edge line (2033) is arranged in a spaced manner with the first edge line (2031), one end of the third edge line (2033) is connected with the other end of the second edge line (2032), and the third edge line (2033) is a straight line; a fourth edge line (2034) arranged along the circumferential extension of the electrode body (2), one end of the fourth edge line (2034) is connected with the other end of the third edge line (2033), and the other end is connected with the other end of the first edge line (2031).

4. The electrode of claim 3, wherein The second edge line (2032) is an arc line; And / or, the fourth edge line (2034) is an arc line.

5. The electrode of claim 4, wherein The convex direction of the center point of the second edge line (2032) relative to the end point of the second edge line (2032) is opposite to the convex direction of the center point of the fourth edge line (2034) relative to the end point of the fourth edge line (2034), and the convex direction of the second edge line (2032) is arranged in a direction away from the fourth edge line (2034); And / or, the second edge line (2032) and the fourth edge line (2034) are intersecting lines.

6. The electrode of claim 3, wherein The first edge line (2031) comprises a plurality of first points, the third edge line (2033) comprises a plurality of second points, and the first points and the second points are arranged in a one-to-one correspondence; The connecting line between the first point and the corresponding second point is parallel to the connecting line between the midpoint of the first edge line (2031) and the midpoint of the third edge line (2033) along the circumferential direction of the electrode body (2), and the arc length of the connecting line between the first point and the corresponding second point is not greater than half of the outer circumferential length of the electrode body (2).

7. The electrode according to any one of claims 2 to 6, wherein The included angle between adjacent edge lines is an obtuse angle or a circular arc chamfer.

8. The electrode according to any one of claims 1 to 6, wherein The area of the notch (203) is not less than one third of the area of the electrode body (2) along the development direction of the electrode body (2). And / or, the notch (203) is provided with one.

9. An ablation catheter characterized by, Comprise: An insulating body (1); The electrode of any one of claims 1-8, wherein the electrode body (2) in the electrode is provided outside the insulating body (1) through the opening.

10. The ablation catheter of claim 9, wherein, The ablation catheter comprises: A detection unit in communication connection with the electrode body (2), configured to detect a far-field signal formed by the contact between the electrode body (2) and the lesion; And / or, a pulse unit in electrical connection with the electrode body (2).

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