Ablation electrode capable of automatically extending under pressure

Abstract

The utility model belongs to the field of medical apparatus and instruments, and relates to an ablation electrode capable of automatically extending under pressure, which comprises a delivery outer tube, a delivery inner tube and a delivery outer tube, the conveying inner pipe is movably inserted into the first channel of the conveying outer pipe in a penetrating mode and provided with a through second channel, and the conveying inner pipe and the conveying outer pipe both have insulation performance. The ablation electrode can be configured with ablation energy and is of a self-expanding hollow structure, the ablation electrode is provided with a first end and a second end, the first end of the ablation electrode is fixed to one end of the conveying inner tube, and the ablation electrode can be contained in the conveying outer tube; the guide wire is movably inserted into the second channel of the conveying inner tube, one end of the guide wire extends out of the conveying inner tube, and the second end of the ablation electrode is slidably arranged on the guide wire in a sleeving mode; when the ablation electrode is subjected to external pressure, the second end of the ablation electrode can slide along the guide wire and is far away from the first end of the ablation electrode, so that the ablation electrode is adaptive to cavities with different diameters of a human body, and damage to the cavities of the human body due to excessive extrusion or support of the ablation electrode is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a compressed self-extending ablation electrode. Background Art

[0002] In recent years, with the continuous development of energy ablation technology, energy ablation has been applied to the treatment of diseases in human cavities. Energy ablation technology is to apply instantaneous energy to the target location and generate local high energy. The local high energy is higher than the threshold, so it can destroy the structure of the site to be ablated, and this damage is irreversible. More and more energy ablation technologies are being used in natural cavities of the human body to perform surgeries to ablate and remove lesions in or near the human cavity.

[0003] In the prior art, an electrode basket stent is usually used to expand the narrow part of the human body cavity, but different human cavities have different inner diameters, and the expansion range of the existing electrode basket stent is a fixed range, which cannot adapt to cavities of different sizes. Therefore, during operation, the relatively small cavity squeezes the basket, causing the electrode basket stent to cause mechanical damage to the inner wall of the human body cavity, which not only affects the normal operation of the electrode basket stent, but also causes uncontrollable damage to the human body cavity. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a compressed self-extending ablation electrode, which enables the ablation electrode to extend to different lengths under pressure, thereby making the size of the ablation electrode adaptive to different sizes of human cavities.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A compressed self-extending ablation electrode, comprising:

[0007] A transport outer tube, which is provided with a distal end and a proximal end, and the transport outer tube has a first passage therethrough;

[0008] The inner delivery tube is movably inserted into the first channel of the outer delivery tube, and has a second through channel. One end of the inner delivery tube can pass through the far end of the outer delivery tube. Both the inner delivery tube and the outer delivery tube have insulating properties.

[0009] an ablation electrode, which can be configured with ablation energy and is a self-expanding hollow basket woven structure, the ablation electrode having a first end and a second end, the first end of the ablation electrode being fixed to an end of the inner delivery tube that can pass through the first channel of the outer delivery tube, and the ablation electrode being receivable in the first channel of the outer delivery tube;

[0010] A guide wire is movably inserted into the second channel of the inner delivery tube, one end of the guide wire extends out of one end of the inner delivery tube, and the second end of the ablation electrode is slidably sleeved on the guide wire; wherein, when the ablation electrode is subjected to external pressure, the second end of the ablation electrode can slide along the guide wire and away from the first end of the ablation electrode;

[0011] The handle includes a grip and a first shell slidably mounted on the grip, the proximal end of the outer delivery tube is fixedly connected to the first shell, the proximal end of the inner delivery tube is fixedly connected to the grip, and one end of the guide wire is movably connected to the grip; the ablation electrode is stored and released through the relative movement of the first shell and the grip.

[0012] In some embodiments, the basket weave structure of the ablation electrode is formed by weaving memory alloy wires.

[0013] In some embodiments, a stopper is provided at one end of the guide wire, and the second end of the ablation electrode can abut against the stopper.

[0014] In some embodiments, a smooth guiding structure is provided at one end of the limiting member away from the ablation electrode.

[0015] In some embodiments, the first end of the ablation electrode is provided with a first fixing ring, the first fixing ring is provided with a first through hole, one end of the guide wire passes through the first through hole, and the first end of the ablation electrode is fixed to one end of the inner delivery tube through the first fixing ring.

[0016] In some embodiments, the second end of the ablation electrode is provided with a second fixing ring, the second fixing ring is provided with a second through hole, and one end of the guide wire passes through the second through hole so that the second end of the ablation electrode is slidably mounted on the guide wire through the second fixing ring.

[0017] In some embodiments, the first end of the ablation electrode is provided with a tapered section, and the tip of the tapered section is disposed close to one side of the inner delivery tube.

[0018] In some embodiments, a preset distance is set between the stopper and one end of the inner delivery tube, so that when the ablation electrode is squeezed by external force, the maximum distance between the first end and the second end of the ablation electrode is not greater than the preset distance.

[0019] In some embodiments, the handle is provided with a guide rod, the first shell is provided with a first cavity adapted to the guide rod, and the first shell is movably sleeved on the guide rod through the first cavity.

[0020] In some embodiments, a first limiting structure is provided between the guide rod and the first shell, the first limiting structure comprising a first limiting boss provided on the first shell and a first limiting groove provided on the guide rod; or a first limiting groove provided on the first shell and a first limiting boss provided on the guide rod, the first limiting boss is clamped in the first limiting groove, and the first limiting groove is adapted to the first limiting boss so that the first shell only performs axial reciprocating movement relative to the guide rod.

[0021] In some embodiments, a first threaded hole is provided on the first shell, a first locking nut is provided on the first threaded hole, and one end of the first locking nut can abut against or disengage from the guide rod.

[0022] In some embodiments, the guide rod is provided with a through third channel, the first shell, the guide rod and the third channel are coaxially arranged, and one end of the guide wire passes through the third channel and is movably connected to the guide rod.

[0023] In some embodiments, one end of the guide rod is provided with a snap-in slot, one end of the guide wire is connected to an elastic buckle adapted to the snap-in slot, and the guide wire is movably connected to the guide rod via the elastic buckle and the snap-in slot.

[0024] In some embodiments, a first wire is further included, wherein the first wire is inserted into the second channel of the inner delivery tube, one end of the first wire is electrically connected to the ablation electrode, and the other end of the first wire is connected to an external energy generator through the handle to transmit ablation energy to the ablation electrode.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present application arranges the ablation electrode into an expandable structure, fixes the first end of the ablation electrode on the inner delivery tube, and slides the second end of the ablation electrode on the guide wire. The ablation electrode is arranged into an expandable structure. When squeezed by external force, the second end of the ablation electrode can slide along the guide wire and away from the first end of the ablation electrode, thereby reducing the outer diameter of the ablation electrode, adapting to human cavities of different sizes, and while ensuring the adhesion effect with the inner wall of the human cavity, it can also avoid mechanical damage to the inner wall of the human cavity caused by strong support, thereby improving the ablation efficiency and providing patients with a better experience during the ablation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0028] Figure 1 It is a three-dimensional structural diagram of the overall assembly of the compressed self-extending ablation electrode of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the connection of the ablation electrode part of the present invention;

[0030] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0031] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0032] Figure 5 A cross-sectional view of the internal structure of the handle portion of the compressed self-extending ablation electrode of the present invention;

[0033] Figure 6 A three-dimensional structural diagram of the handle of the compressed self-extending ablation electrode of the present invention;

[0034] Figure 7 for Figure 6 a cross-sectional view of the middle guide rod;

[0035] Figure 8 It is a three-dimensional structural diagram of the elastic buckle of the compressed self-extending ablation electrode of the present invention;

[0036] Fig. 9 It is a front view of the elastic buckle of the compressed self-extending ablation electrode of the present invention;

[0037] Fig.10 A top view of the elastic buckle of the compressed self-extending ablation electrode of the present invention;

[0038] Fig.11 It is a three-dimensional structural diagram of the first shell of the handle portion of the pressurized self-extending ablation electrode of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] like Figures 1 to 4 As shown, a compressed self-extending ablation electrode provided by the present invention mainly includes an inner delivery tube 2, an outer delivery tube 5, an ablation electrode 1 and a guide wire 4.

[0041] Specifically, the outer delivery tube 2 is provided with a distal end and a proximal end, and a first channel 21 penetrating the distal end and the proximal end of the outer delivery tube 2 is provided. Figure 1 direction shown, Figure 1 The left side of the illustration is the distal end, and the right side of the illustration is the proximal end;

[0042] The inner delivery tube 5 is movably arranged in the first channel 21 of the outer delivery tube 2. The inner delivery tube 5 and the outer delivery tube 2 can move relative to each other in the axial direction. The outer diameter of the inner delivery tube 5 is slightly smaller than the inner diameter of the first channel 21 of the outer delivery tube 2, so that when the catheter structure is compact, the inner delivery tube 5 has a small movement resistance relative to the outer delivery tube 2, wherein the inner delivery tube 5 is provided with a second channel 51 that passes through both ends of the inner delivery tube 5. In this embodiment, both the inner delivery tube 5 and the outer delivery tube 2 have a certain degree of flexibility so as to adapt to the more complex curved natural cavity of the human body, and both the inner delivery tube 5 and the outer delivery tube 2 are insulating tubes.

[0043] The ablation electrode 1 is a self-expanding hollow structure. The ablation energy of the external energy generator can be configured to be transmitted to the ablation electrode 1 to form a pulse electric field for pulse ablation. The ablation electrode 1 is provided with a first end and a second end. The first end of the ablation electrode 1 is fixedly connected to one end of the inner delivery tube 5. When the ablation electrode 1 is delivered to the lesion, the ablation electrode 1 can be squeezed and accommodated in the first channel 21 of the outer delivery tube 2 through the relative movement between the inner delivery tube 5 and the outer delivery tube 2. When the ablation electrode 1 is pushed out of the first channel 21 of the outer delivery tube 2, the ablation electrode 1 self-expands and expands to a natural state, that is, the outer diameter of the ablation electrode 1 is relatively large at this time, and can conform to the inner wall of the thicker human cavity.

[0044] The guide wire 4 is movably arranged in the second channel 51 of the transport inner tube 5. The guide wire 4 can move relative to the transport inner tube 5 along its own axial direction. One end of the guide wire 4 extends out of one end of the transport inner tube 5. In this embodiment, one end of the transport inner tube 5 is the end of the transport inner tube 5 that passes through the proximal end of the transport outer tube 2. The second end of the ablation electrode 1 is slidably sleeved on the guide wire 4. Specifically, when the inner diameter of the human body cavity at the lesion is smaller than the outer diameter of the ablation electrode 1 after self-expansion, the ablation electrode 1 is squeezed by the human body cavity. In order to release the squeezing force, the second end of the ablation electrode 1 can slide along the axial direction of the guide wire 4, and the second end of the ablation electrode 1 is away from the first end of the ablation electrode 1, so that the ablation electrode 1 adaptively sticks to the inner wall of the human body cavity.

[0045] In the present application, the second end of the ablation electrode 1 is slidably set on the guide wire 4, so that when the ablation electrode 1 is squeezed, the second end of the ablation electrode 1 can move away from the first end, reducing the outer diameter of the ablation electrode 1 and releasing the squeezing force, thereby avoiding excessive support of the ablation electrode 1 or mechanical damage to the inner wall of the human cavity when the ablation electrode 1 moves.

[0046] In one embodiment, in order to allow the ablation electrode 1 to be squeezed and accommodated in the first channel 21 of the outer delivery tube 2, and at the same time, the end of the ablation electrode 1 that is fully extended out of the outer delivery tube 2 can self-expand into a preset ablation shape to abut against the inner wall of the human body cavity, the ablation electrode 1 is a basket structure woven from memory alloy wires. By using memory alloy materials, the ablation electrode 1 is set to a structure with a relatively large diameter in a natural state. When the ablation electrode 1 extends out of the first channel 21, the ablation electrode 1 woven from the memory alloy does not need external structure control and self-expands into an ablation structure with a relatively large diameter. Specifically, in this embodiment, Figure 2 As shown, since most of the human body cavities are cylindrical structures, the ablation electrode 1 is a cylindrical basket weaving structure, so that the ablation electrode 1 can better fit the inner wall of the human body cavity. On the one hand, the basket weaving structure has good support performance and good abutment effect. On the other hand, the basket weaving structure has high flexibility, which further improves the local abutment ability of the ablation electrode 1. In this embodiment, the memory alloy material is Ti-Ni, NiAl, etc.

[0047] In one embodiment, in order to prevent the ablation electrode 1 from over-stretching, a limiter 41 is provided at one end of the guide wire 4, wherein the second end of the ablation electrode 1 can abut against the limiter 41, and the second end of the ablation electrode 1 is limited by the limiter 41. Specifically, the limiter 41 is a boss having an outer diameter larger than the outer diameter of the second end of the ablation electrode 1. Furthermore, since the guide wire 4 needs to move in the human body cavity, in order to prevent the front end of the guide wire 4 from causing damage to the human body cavity during the transportation of the ablation electrode 1, Figure 3 As shown, a smooth guide structure is provided at one end of the limiter 41 away from the ablation electrode 1. In this embodiment, the smooth guide structure is a semicircular structure. Optionally, the smooth guide structure can also be a combination of an arc surface and a plane. In this embodiment, in order to reduce the number of parts, the limiter 41 and the smooth guide structure are integrated. Optionally, the limiter 41 can also be separately provided from the smooth guide structure. In this embodiment, the limiter 41 is an insulating structure made of elastic material, and the guide wire 4 is also an insulating structure.

[0048] In one embodiment, the ablation electrode 1 is formed by weaving memory alloy wires. Figure 3 and Figure 4As shown, a large number of braided wire heads are formed at both ends of the ablation electrode 1, a first fixing ring 14 is provided at the first end of the ablation electrode 1, and a second fixing ring 13 is provided at the second end of the ablation electrode. Specifically, a first through hole is provided on the first fixing ring 14, one end of the guide wire 4 passes through the first through hole, and the guide wire 4 can move relative to the first fixing ring 14, the first end of the ablation electrode 1 is fixed to one end of the inner conveying tube through the first fixing ring 14, the second end of the ablation electrode 1 is fixed through the second fixing ring 13, the braided heads of the memory alloy wire are gathered, a second through hole is provided on the second fixing ring 13, one end of the guide wire 4 with a limiter 41 passes through the second through hole, and the guide wire 4 can slide relative to the second fixing ring 13.

[0049] In one embodiment, in order to facilitate the ablation electrode 1 to be received in the first channel 21 of the delivery outer tube 2, a tapered section 12 is provided at the first end of the ablation electrode 1, wherein the tip of the tapered section 12 is provided close to one side of the delivery inner tube 5, such as Figure 2 As shown, the tapered section 12 is similar to a triangular structure, and the tip of the triangle faces the distal end of the outer delivery tube 2. By providing the tapered section 12, the resistance of the ablation electrode 1 when it is received in the outer delivery tube 2 can be effectively reduced. Furthermore, in this embodiment, the ablation electrode 1 is also provided with an ablation section 11, wherein the ablation section 11 is a cylindrical structure, which is close to the shape of the human body cavity, so that the ablation section 11 of the ablation electrode 1 can better adhere to the inner wall of the human body cavity and improve the ablation effect.

[0050] In one embodiment, when the ablation electrode 1 is transported to the target position, a preset distance is set between the stopper 41 and one end of the transport inner tube 5. In this embodiment, one end of the transport inner tube 5 is the end at which the transport inner tube 5 is fixedly connected to the ablation electrode 1. By setting the preset distance, when the ablation electrode 1 is squeezed by the inner wall of the human body cavity, a sufficient sliding length can be reserved for the second end of the ablation electrode 1, so that the ablation electrode 1 can adapt to the size of the human body cavity. In this embodiment, as the best implementation, when the ablation electrode 1 is squeezed, the second end of the ablation electrode 1 abuts against the stopper 41. At this time, the outer diameter of the ablation electrode 1 adapts to the inner diameter of the human body cavity, and the ablation section 11 of the ablation electrode 1 fits the inner wall of the human body cavity, thereby ensuring that the stopper 41 limits the second end of the ablation electrode 1 to avoid excessive movement of the ablation electrode 1 during the ablation process. Optionally, the preset distance can also be greater than the maximum distance from the second end to the first end of the ablation electrode 1.

[0051] In one embodiment, a handle 3 is further included, and the handle 3 is used to control the delivery and storage of the ablation electrode 1. Specifically, the handle 3 includes a grip 32 and a first shell 31, wherein the first shell 31 is movably mounted on the grip 32, the proximal end of the delivery inner tube 5 is connected to the grip 32, the proximal end of the delivery outer tube 2 is fixedly connected to the first shell 31, and one end of the guide wire 4 is movably connected to the grip 32. By controlling the relative movement between the first shell 31 and the grip 32, the relative movement between the delivery inner tube 5 and the delivery outer tube 2 is driven, so that the ablation electrode 1 is stored or extended into the first channel 21 of the delivery outer tube 2. When the ablation electrode 1 is being delivered, the movement between the first shell 31 and the grip 32 places the ablation electrode 1 in the first channel 21 of the delivery outer tube 32. When the ablation electrode 1 is delivered to the target position, the movement between the first shell 31 and the grip 32 realizes the release of the ablation electrode 1. In this embodiment, when the operator is operating, the grip 32 remains stationary and the first shell 31 is moved.

[0052] Furthermore, if Figure 5 and Figure 6 As shown, the handle 32 includes a handle 323 and a guide rod 321. In this embodiment, the handle 323 and the guide rod 321 are provided with a certain angle. Fig.11 As shown, a first cavity 311 adapted to the outer shape of the guide rod 321 is provided on the first shell 31 , and the first shell 31 is movably inserted into the guide rod 321 through the first cavity 311 .

[0053] Further, in order to avoid radial rotation between the inner conveying tube 5 and the outer conveying tube 2, a first limiting structure is provided between the guide rod 321 and the first housing 31, and the first limiting structure includes a first limiting boss 312 and a first limiting groove 3212 adapted thereto. In this embodiment, the first limiting boss 312 is provided on the first housing 31, as shown in FIG. Figure 6 and Figure 7As shown, the first limiting groove 3212 is arranged on the guide rod 321, wherein the first limiting groove 3212 is arranged parallel to the central axis of the guide rod 321, so that the first shell 31 moves back and forth in a straight line along the axial direction of the guide rod 3212. In this embodiment, the number of the first limiting boss 312 and the first limiting groove 3212 are both two, and they are arranged correspondingly. As another variation of this embodiment, the first limiting boss 312 can also be arranged on the guide rod 321, and the first limiting groove 3212 can be arranged on the inner wall of the first shell 31. Similarly, the first limiting boss 312 or the first limiting groove 3212 is arranged parallel to the central axis of the guide rod 321. It can be understood that the number and shape of the first limiting groove 3212 are not limited by the present invention. In this embodiment, both are arc-shaped structures, and optionally, they can also be rectangular or triangular shapes. Optionally, the guide rod 321 may be directly set to an irregular structure, and the first cavity 311 of the first shell 31 may be adapted thereto. For example, the guide rod 321 may be in the shape of a triangular prism or a quadrangular prism to prevent the first shell 31 from rotating around the guide rod 321 .

[0054] In one embodiment, when the ablation electrode 1 extends out of the first channel 21 of the delivery outer tube 2, in order to prevent the first end of the ablation electrode 1 from moving relative to the delivery outer tube 2, again referring to Fig.11 A first threaded hole 313 is provided on the first shell 31, and a first locking nut 314 is provided on the first threaded hole 313. By rotating the first locking nut 314, one end of the first locking nut 314 is controlled to move away from or abut against the guide rod 321, so that the ablation electrode 1 can be moved for storage and pushing, or the position of the inner tube 5 can be fixed, thereby fixing the first end of the ablation electrode 1.

[0055] In one embodiment, in order to reduce the resistance between the inner conveying tube 5 and the outer conveying tube 2 during the movement of the first shell 31, Figure 5 A third through channel 3211 is provided on the guide rod 321, wherein the third channel 3211, the first shell 31 and the guide rod 321 are coaxially arranged, and one end of the guide wire 4 passes through the third channel 3211 and is movably connected with one end of the guide rod 321. Specifically, one end of the inner transport tube 5 is fixed in the third channel 3211, thereby ensuring that the inner transport tube 5 and the outer transport tube 2 are coaxially arranged, thereby reducing the resistance during the relative movement of the two.

[0056] In one embodiment, a snap-in slot 323 is provided at one end of the guide rod 321, and an elastic snap 33 adapted to the snap-in slot 323 is connected to one end of the guide wire 4. Specifically, the snap-in slot 323 is formed by the snap-in baffle 324 and the side wall of the guide rod 321, as shown in FIG. Figure 6As shown, a second limiting groove 325 is provided on the inner wall of the snap-fitting notch 323, and a second limiting boss 333 is provided on the elastic snap buckle 33 to match it. Figure 8-10 As shown, the elastic buckle 33 includes an elastic paddle 331, a clamping boss 332 is provided on the elastic paddle 331, and a first guide surface 3321 and a first clamping surface 3322 are provided on the clamping boss 332. In this embodiment, there are two elastic paddles 331, and they are symmetrically arranged, so that the operator can fix the elastic buckle and disengage it from the clamping notch 323. When the elastic buckle 33 is installed, the first guide surface 3321 and the clamping baffle 324 are squeezed and guided to make the elastic pick 331 move toward the side of the second limiting boss 333 so that the clamping boss 332 passes through the through hole of the clamping baffle 324. In this embodiment, part of the elastic pick is adapted to the inner diameter of the through hole. When the clamping boss 332 passes through the through hole of the clamping baffle 324, the elastic pick 331 returns to its initial state, so that the first clamping surface 3322 of the clamping boss 332 can be abutted and fixed to one side of the clamping baffle 324. Fig. 9 In the direction shown, the second engaging surface 334 at the lower end of the elastic buckle 33 abuts against the inner wall of the engaging notch 323, that is, the distance between the second engaging surface 334 and the first engaging surface 4422 matches the depth of the engaging notch. The elastic buckle is limited in axial movement and radial rotation by the engaging boss 332 and the second limiting boss 333, so that the elastic buckle 33 is fixedly installed relative to the guide rod 321. By setting the elastic buckle 33, the active connection of the guide wire 4 relative to the guide rod 321 is realized, so as to adjust the preset distance between the end of the guide wire 4 provided with the limiting member 41 and the conveying inner tube 5.

[0057] In one embodiment, Figure 5 As shown, it also includes a first wire 6, which is inserted into the second channel 51 of the inner delivery tube 5, and one end of the first wire 4 is electrically connected to the ablation electrode 1 through the second channel 51. Specifically, the first wire can be directly connected to the memory alloy wire of the ablation electrode. Furthermore, the first fixing ring is made of a metal conductive structure, and one end of the first wire is directly connected to the first fixing ring for conduction, thereby avoiding the occurrence of virtual connection or missing connection, making the energy transfer process more stable; the other end of the first wire 6 is connected to the external energy generator through the fourth channel 3231 of the handle 323, so that the ablation energy is transmitted to the ablation electrode 1.

[0058] The above is only a preferred embodiment of the present invention. It should be noted that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A compressed self-extending ablation electrode, characterized in that: include: A transport outer tube, which is provided with a distal end and a proximal end, and the transport outer tube has a first passage therethrough; The inner delivery tube is movably inserted into the first channel of the outer delivery tube, and has a second through channel. One end of the inner delivery tube can pass through the far end of the outer delivery tube. Both the inner delivery tube and the outer delivery tube have insulating properties. an ablation electrode, which can be configured with ablation energy and is a self-expanding hollow basket woven structure, the ablation electrode having a first end and a second end, the first end of the ablation electrode being fixed to an end of the inner delivery tube that can pass through the first channel of the outer delivery tube, and the ablation electrode being receivable in the first channel of the outer delivery tube; A guide wire is movably inserted into the second channel of the inner delivery tube, one end of the guide wire extends out of one end of the inner delivery tube, and the second end of the ablation electrode is slidably sleeved on the guide wire; wherein, when the ablation electrode is subjected to external pressure, the second end of the ablation electrode can slide along the guide wire and away from the first end of the ablation electrode; The handle includes a grip and a first shell slidably mounted on the grip, the proximal end of the outer delivery tube is fixedly connected to the first shell, the proximal end of the inner delivery tube is fixedly connected to the grip, and one end of the guide wire is movably connected to the grip; the ablation electrode is stored and released through the relative movement of the first shell and the grip.

2. The compressed self-extending ablation electrode according to claim 1, characterized in that: The basket weaving structure of the ablation electrode is formed by weaving memory alloy wires.

3. The compressed self-extending ablation electrode according to claim 2, characterized in that: A stopper is provided at one end of the guide wire, and the second end of the ablation electrode can abut against the stopper.

4. The compressed self-extending ablation electrode according to claim 3, characterized in that: A smooth guiding structure is provided at one end of the limiting member away from the ablation electrode.

5. The compressed self-extending ablation electrode according to claim 2, characterized in that: The first end of the ablation electrode is provided with a first fixing ring, the first fixing ring is provided with a first through hole, one end of the guide wire passes through the first through hole, and the first end of the ablation electrode is fixed to one end of the inner delivery tube through the first fixing ring.

6. The compressed self-extending ablation electrode according to claim 5, characterized in that: The second end of the ablation electrode is provided with a second fixing ring, the second fixing ring is provided with a second through hole, and one end of the guide wire passes through the second through hole, so that the second end of the ablation electrode is slidably sleeved on the guide wire through the second fixing ring.

7. The compressed self-extending ablation electrode according to claim 2, characterized in that: A tapered section is provided at the first end of the ablation electrode, and the tip of the tapered section is arranged close to one side of the inner delivery tube.

8. The compressed self-extending ablation electrode according to claim 3, characterized in that: A preset distance is set between the stopper and one end of the inner delivery tube, so that when the ablation electrode is squeezed by external force, the maximum distance between the first end and the second end of the ablation electrode is not greater than the preset distance.

9. The compressed self-extending ablation electrode according to claim 1, characterized in that: The handle is provided with a guide rod, the first shell is provided with a first cavity matched with the guide rod, and the first shell is movably sleeved on the guide rod through the first cavity.

10. The compressed self-extending ablation electrode according to claim 9, characterized in that: A first limiting structure is provided between the guide rod and the first shell, and the first limiting structure includes a first limiting boss provided on the first shell and a first limiting groove provided on the guide rod; or a first limiting groove provided on the first shell and a first limiting boss provided on the guide rod, the first limiting boss is clamped in the first limiting groove, and the first limiting groove is adapted to the first limiting boss so that the first shell only performs axial reciprocating movement relative to the guide rod.

11. The compressed self-extending ablation electrode according to claim 9, characterized in that: The first shell is provided with a first threaded hole, the first threaded hole is provided with a first locking nut, and one end of the first locking nut can abut against or be separated from the guide rod.

12. The compressed self-extending ablation electrode according to claim 9, characterized in that: The guide rod is provided with a third through passage, the first shell, the guide rod and the third passage are coaxially arranged, and one end of the guide wire passes through the third passage and is movably connected to the guide rod.

13. The compressed self-extending ablation electrode according to claim 12, characterized in that: One end of the guide rod is provided with a clamping notch, one end of the guide wire is connected with an elastic buckle adapted to the clamping notch, and the guide wire is movably connected to the guide rod through the elastic buckle and the clamping notch.

14. The compressed self-extending ablation electrode according to claim 1, characterized in that: It also includes a first wire, which is inserted into the second channel of the inner delivery tube, one end of which is electrically connected to the ablation electrode, and the other end of which is connected to an external energy generator through the handle to transmit ablation energy to the ablation electrode.

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