Connecting structure for ablation catheter, ablation catheter and ablation system

Abstract

The utility model discloses a connecting structure for an ablation catheter, the ablation catheter and an ablation system. The connecting structure comprises a first connector assembly, a second connector assembly and a third connector assembly. The energy transmission element can penetrate through the first connector assembly. The inner pipe can penetrate through the second connector assembly, the outer pipe partially penetrates into the second connector assembly, the front end of the outer pipe extends out of the front end of the second connector assembly, the rear end of the inner pipe extends to the rear end of the second connector assembly, and the rear end of the second connector assembly is detachably connected with the front end of the first connector assembly. A first channel is formed between the inner wall of the inner pipe and the outer wall of the energy transmission element, a second channel is formed between the inner wall of the outer pipe and the outer wall of the inner pipe, and one of the first connector assembly and the second connector assembly can be communicated with a cooling source. A cooling medium provided by the cooling source passes through the first channel and the second channel and then is discharged through the other one of the first connector assembly and the second connector assembly. According to the connecting structure, the ablation catheter is more convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and in particular to a connection structure for an ablation catheter, an ablation catheter and an ablation system. Background Art

[0002] Laser Interstitial Thermal Therapy (LITT) is a percutaneous minimally invasive surgery under stereotactic guidance. The laser is applied to the target through an energy transmission element, thereby selectively ablating the diseased tissue. During the operation, the energy transmission element transmits light energy to the lesion tissue for precise irradiation, achieving photothermal conversion, causing the temperature of the lesion area to rise, resulting in thermal coagulation and denaturation of the lesion tissue, thereby achieving the treatment purpose.

[0003] During the above treatment process, a corresponding ablation catheter needs to be used. The ablation catheter usually includes an energy transmission element, an inner tube, an outer tube and other structures. However, the current ablation catheter is not convenient to disassemble and assemble. Utility Model Content

[0004] The utility model provides a connection structure for an ablation catheter, an ablation catheter and an ablation system, which are more convenient to disassemble and assemble.

[0005] In a first aspect, an embodiment of the utility model provides a connection structure for an ablation catheter, comprising: a first joint assembly, in which an energy transmission element of the ablation catheter can be inserted; a second joint assembly, in which an inner tube of the ablation catheter can be inserted, and an outer tube portion of the ablation catheter is inserted into the second joint assembly, a front end of the outer tube extends outward from the front end of the second joint assembly, and a rear end of the inner tube extends to the rear end of the second joint assembly, the rear end of the second joint assembly is detachably connected to the front end of the first joint assembly, a first channel is formed between the inner wall of the inner tube and the outer wall of the energy transmission element, and a second channel is formed between the inner wall of the outer tube and the outer wall of the inner tube, one of the first joint assembly and the second joint assembly can be connected to the cooling source, and the cooling medium provided by the cooling source passes through the first channel and the second channel and is discharged through the other of the first joint assembly and the second joint assembly.

[0006] According to the aforementioned embodiment of the first aspect of the utility model, the connection structure for the ablation catheter also includes: a connector, which is sleeved on the rear end of the second connector assembly and is detachably connected to the front end of the first connector assembly, and the connector is used to lock and connect the rear end of the second connector assembly with the front end of the first connector assembly.

[0007] According to any of the aforementioned embodiments of the first aspect of the utility model, a torsion limiting structure is provided between the second joint assembly and the first joint assembly, and the torsion limiting structure is used to limit the torsion of the second joint assembly relative to the first joint assembly.

[0008] According to the aforementioned embodiment of the first aspect of the utility model, the rear end of the second joint assembly is inserted into the front end of the first joint assembly, the front end of the first joint assembly is provided with a guide groove extending parallel to the axial direction of the first joint assembly, and the outer peripheral surface of the second joint assembly is provided with a guide protrusion that cooperates with the guide groove, and the guide protrusion is inserted into the corresponding guide groove to limit the torsion of the second joint assembly relative to the first joint assembly.

[0009] According to any of the aforementioned embodiments of the first aspect of the utility model, the rear end of the second joint assembly is inserted into the front end of the first joint assembly, the inner cavity of the first joint assembly is provided with a first centering guide structure, and the rear end of the second joint assembly is provided with a second centering guide structure, and when the connecting piece locks the second joint assembly with the first joint assembly, the second centering guide structure cooperates with the first centering guide structure so that the center axis of the second joint assembly coincides with the center axis of the first joint assembly.

[0010] According to any of the aforementioned embodiments of the first aspect of the utility model, the first centering guide structure and the second centering guide structure are respectively conical structures and match each other.

[0011] According to any of the aforementioned embodiments of the first aspect of the utility model, the first joint assembly includes a first cylinder, the second joint assembly includes a second cylinder and an inner tube seal located at the rear end of the second cylinder, the first centering guide structure is arranged on the inner circumferential surface of the first cylinder, and the second centering guide structure is arranged on the outer circumferential surface of the inner tube seal; the inner tube seal is an elastic member, and when the connecting member locks the second joint assembly and the first joint assembly together, the second centering guide structure on the outer circumferential surface of the inner tube seal is extruded and connected with the first centering guide structure on the inner circumferential surface of the first cylinder.

[0012] According to any of the aforementioned embodiments of the first aspect of the utility model, the first joint assembly includes: a first cylinder, the energy transmission element is inserted into the first cylinder, and the outer periphery of the first cylinder extends outwardly to be provided with a first interface; a sealing plug; a sealing cover, the sealing plug is pressed against the rear end of the first cylinder, the energy transmission element is inserted into the sealing cover and the sealing plug, and is sealed with the sealing plug.

[0013] According to any of the aforementioned embodiments of the first aspect of the utility model, the second joint assembly includes: a second cylinder, the inner tube is inserted into the second cylinder, the outer tube partially penetrates into the second cylinder, the outer circumference of the second cylinder extends outwardly to be provided with a second interface, and the second interface is connected to the second channel; an inner tube seal is located at the rear end of the second cylinder; an outer tube seal is located at the front end of the second cylinder; an outer tube fixing part presses the outer tube seal to the front end of the second cylinder, and connects the outer tube and the second cylinder coaxially.

[0014] In a second aspect, an embodiment of the utility model provides an ablation catheter, comprising: an energy transmission element; an inner tube, sleeved on the outer circumference of the energy transmission element, a first channel is formed between the inner wall of the inner tube and the outer wall of the energy transmission element; an outer tube, sleeved on the outer circumference of the inner tube, a second channel is formed between the inner wall of the outer tube and the outer wall of the inner tube, the front end of the outer tube has a closed portion, the second channel is connected to the inside of the first channel at the closed portion; and a connection structure for an ablation catheter according to any of the aforementioned embodiments of the first aspect of the utility model, wherein the energy transmission element is passed through the first joint assembly, the inner tube is passed through the second joint assembly, the outer tube partially passes through the second joint assembly, the front end of the outer tube extends outward from the front end of the second joint assembly, and the rear end of the inner tube extends to the rear end of the second joint assembly.

[0015] In a third aspect, an embodiment of the utility model provides an ablation system, comprising: an ablation catheter according to any of the aforementioned embodiments of the first aspect of the utility model; a cooling source connected to the first joint assembly or the second joint assembly of the ablation catheter; and a medium recovery pool connected to the second joint assembly or the first joint assembly of the ablation catheter.

[0016] According to the connection structure, ablation catheter and ablation system for ablation catheter of the embodiment of the utility model, the ablation catheter includes an energy transmission element, an inner tube and an outer tube, and the connection structure includes a first joint assembly and a second joint assembly. The energy transmission element is inserted into the first joint assembly. The inner tube is inserted into the second joint assembly, the outer tube partially penetrates into the second joint assembly, and the front end of the outer tube extends outward from the front end of the second joint assembly. The rear end of the second joint assembly is detachably connected to the front end of the first joint assembly. When it is necessary to assemble the ablation catheter, the energy transmission element is inserted into the first joint assembly, the inner tube and the outer tube are inserted into the second joint assembly, and then the second joint assembly is connected to the first joint assembly, so that the ablation catheter can be quickly assembled. When it is necessary to disassemble the ablation catheter, the second joint assembly is disassembled and separated from the first joint assembly. By adopting the above-mentioned connection structure for the ablation catheter, the disassembly and assembly process of the ablation catheter is simplified, and the convenience of using the ablation catheter in the ablation system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the ablation catheter of the utility model;

[0019] Figure 2 This is a schematic structural diagram of an embodiment of an ablation catheter of the utility model applied to an ablation system;

[0020] Figure 3 This is a schematic diagram of the cooling principle structure of an embodiment of the ablation catheter of the utility model in a working state;

[0021] Figure 4 It is a three-dimensional exploded schematic diagram of the connection between the second joint component and the first joint component in one embodiment of the ablation catheter of the utility model.

[0022] Description of reference numerals:

[0023] Ablation catheter-100;

[0024] Energy transmission element - 110;

[0025] Inner tube - 120;

[0026] Outer tube-130; Closing part-131;

[0027] first joint assembly-140; guide groove-C1; first central guide structure-D1; first cylinder-141; first interface-1411; sealing plug-142; sealing cover-143;

[0028] The second joint assembly-150; the guide protrusion-C2; the second central guide structure-D2; the second cylinder-151; the second interface-1511; the inner tube seal-152; the outer tube seal-153; the outer tube fixing member-154;

[0029] Connector - 160;

[0030] Cooling source-200; cooling source box-210; water pump-220; heater-230;

[0031] Media recovery tank-300;

[0032] Inlet pipeline-400;

[0033] Export pipeline - 500;

[0034] First channel - T1; second channel - T2.

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] The progress of modern cutting-edge science and technology has brought new developments to the diagnosis and treatment of intracranial tumors, and the survival expectancy and survival rate of brain tumor patients have been greatly improved. Among them, Laser Interstitial Thermal Therapy (LITT) guided by Magnetic Resonance Imaging (MRI) has played a great role. Laser interstitial thermal therapy is a percutaneous minimally invasive surgery under stereotactic guidance. The laser acts on the target through an energy transmission element, thereby selectively ablating the diseased tissue. During the operation, the energy transmission element transmits light energy to the lesion tissue for precise irradiation, realizing photothermal conversion, causing the temperature of the lesion area to rise, resulting in thermal coagulation and degeneration of the lesion tissue, thereby achieving the treatment goal.

[0040] The embodiment of the utility model provides a connection structure for an ablation catheter, an ablation catheter and an ablation system. The ablation catheter includes the connection structure for an ablation catheter, and the ablation system includes the ablation catheter.

[0041] The connection structure for an ablation catheter and the ablation catheter according to the embodiment of the utility model will be described below in conjunction with the accompanying drawings. Figure 1 It is a cross-sectional schematic diagram of an embodiment of the ablation catheter of the utility model. Figure 2 This is a schematic diagram of the structure of an embodiment of the ablation catheter of the utility model applied to an ablation system. Figure 3 The schematic diagram of the cooling principle structure of an embodiment of the ablation catheter of the utility model in the working state.

[0042] The connection structure for the ablation catheter includes a first joint assembly 140 and a second joint assembly 150. The energy transmission element 110 of the ablation catheter can be inserted into the first joint assembly 140. The inner tube 120 of the ablation catheter can be inserted into the second joint assembly 150, and the outer tube 130 of the ablation catheter partially penetrates the second joint assembly 150, the front end of the outer tube 130 extends outward from the front end of the second joint assembly 150, and the rear end of the inner tube 120 extends to the rear end of the second joint assembly 150. The energy transmission element 110 is, for example, an optical fiber.

[0043] The rear end of the second joint assembly 150 is detachably connected to the front end of the first joint assembly 140. A first channel T1 is formed between the inner wall of the inner tube 120 and the outer wall of the energy transmission element 110, and a second channel T2 is formed between the inner wall of the outer tube 130 and the outer wall of the inner tube 120. One of the first joint assembly 140 and the second joint assembly 150 can be connected to the cooling source 200, and the cooling medium provided by the cooling source 200 passes through the first channel T1 and the second channel T2 and is discharged through the other of the first joint assembly 140 and the second joint assembly 150. In this embodiment, the first joint assembly 140 connects the first channel T1 with the cooling source 200, and the cooling medium provided by the cooling source 200 passes through the first channel T1 and the second channel T2 and is discharged through the second joint assembly 150. Figure 3 In the figure, the flow direction of the cooling medium is shown by arrows.

[0044] Herein, the “front end” of a component refers to the end close to or facing the tissue to be ablated 900 when the ablation catheter 100 is in operation, and the “rear end” of a component refers to the end away from or facing away from the tissue to be ablated 900 when the ablation catheter 100 is in operation.

[0045] The front end of the energy transmission element 110 and the front end of the inner tube 120 both extend to the interior of the closed portion 131 , and there is a gap between them and the inner wall of the closed portion 131 .

[0046] According to the connection structure for ablation catheter of the above embodiment, the ablation catheter 100 includes an energy transmission element 110, an inner tube 120, and an outer tube 130, and the connection structure includes a first joint assembly 140 and a second joint assembly 150. The energy transmission element 110 is inserted into the first joint assembly 140. The inner tube 120 is inserted into the second joint assembly 150, and the outer tube 130 partially penetrates the second joint assembly 150, and the front end of the outer tube 130 extends outward from the front end of the second joint assembly 150. The rear end of the second joint assembly 150 is detachably connected to the front end of the first joint assembly 140. When the ablation catheter 100 needs to be assembled, the energy transmission element 110 is inserted into the first joint assembly 140, the inner tube 120 and the outer tube 130 are inserted into the second joint assembly 150, and then the second joint assembly 150 is connected to the first joint assembly 140, so that the ablation catheter 100 can be quickly assembled. When the ablation catheter 100 needs to be disassembled, the second connector assembly 150 can be separated from the first connector assembly 140. By adopting the above connection structure for the ablation catheter, the disassembly and assembly process of the ablation catheter 100 is simplified, and the convenience of using the ablation catheter 100 in the ablation system is improved.

[0047] In some embodiments, the connection structure for the ablation catheter further includes a connector 160. The connector 160 is sleeved on the rear end of the second connector assembly 150 and is detachably connected to the front end of the first connector assembly 140. The connector 160 is used to lock and connect the rear end of the second connector assembly 150 with the front end of the first connector assembly 140.

[0048] In this embodiment, the connector 160 is a threaded connector, and the connector 160 can be threadedly connected to the front end of the first connector assembly 140. In the process of gradually tightening the connector 160 and the front end of the first connector assembly 140, the second connector assembly 150 and the first connector assembly 140 are gradually locked. This embodiment realizes the detachable connection between the rear end of the second connector assembly 150 and the front end of the first connector assembly 140 through the detachable connection mode of the connector 160, making the assembly process of the ablation catheter 100 more convenient and reducing the problems such as defects of the energy transmission element 110 caused by complex assembly. When the connector 160 is a threaded connector, it is easier to control the tightness of the connection between the second connector assembly 150 and the first connector assembly 140, and it is also convenient for disassembly and adjustment.

[0049] Figure 4 The figure is a perspective exploded schematic diagram of the connection between the second joint assembly and the first joint assembly in an embodiment of the ablation catheter of the present invention. In some embodiments, a torsion limiting structure is provided between the second joint assembly 150 and the first joint assembly 140, and the torsion limiting structure is used to limit the torsion of the second joint assembly 150 relative to the first joint assembly 140.

[0050] According to the connection structure of the above embodiment, a torsion limiting structure is provided between the second joint assembly 150 and the first joint assembly 140, and the torsion limiting structure is used to limit the torsion of the second joint assembly 150 relative to the first joint assembly 140, so that after the ablation catheter 100 is assembled, the second joint assembly 150 and the first joint assembly 140 will not be torsionally misaligned, thereby improving the position accuracy between the second joint assembly 150 and the first joint assembly 140 and between the energy transmission element 110, the inner tube 120, and the outer tube 130.

[0051] In some embodiments, the closed portion 131 of the outer tube 130 is a hemispherical structure, which facilitates the cooling medium to swirl there, thereby reducing the generation of turbulence. In some embodiments, by iterating the flow field simulation test in the ablation catheter 100 and optimizing the size and relative position of each component of the ablation catheter 100, the heat accumulation caused by turbulence at the front end of the ablation catheter 100 can be greatly reduced, providing more stable cooling protection under laser thermocoagulation.

[0052] The inner tube 120 and the outer tube 130 can be made of glass materials with high light transmittance to improve the laser ablation efficiency. In some other embodiments, the inner tube 120 and the outer tube 130 can also be made of resin materials.

[0053] In some embodiments, the rear end of the second joint component 150 is inserted into the front end of the first joint component 140. The front end of the first joint component 140 is provided with a guide groove C1 extending parallel to the axial direction of the first joint component 140. The outer peripheral surface of the second joint component 150 is provided with a guide protrusion C2 that cooperates with the guide groove C1. The guide protrusion C2 is inserted into the corresponding guide groove C1 to limit the torsion of the second joint component 150 relative to the first joint component 140.

[0054] In the above embodiment, the torsion limiting structure includes a guide groove C1 and a guide protrusion C2 that guide and cooperate with each other. When the second joint assembly 150 is assembled and connected with the first joint assembly 140, the guide protrusion C2 is guided and limited by the guide groove C1, thereby avoiding the torsion of the second joint assembly 150 relative to the first joint assembly 140, thereby ensuring that the second joint assembly 150 and the first joint assembly 140 will not be misaligned.

[0055] In some embodiments, the number of the guide grooves C1 is at least two, and the at least two guide grooves C1 are arranged around the central axis of the first joint assembly 140 , and the guide protrusions C2 are disposed in one-to-one correspondence with the guide grooves C1 .

[0056] In this embodiment, there are two guide grooves C1, which are symmetrically arranged. There are two guide protrusions C2, which are symmetrically arranged on the outer peripheral surface of the second joint assembly 150. In other embodiments, the number of guide grooves C1 and guide protrusions C2 can be other numbers.

[0057] In some embodiments, the rear end of the second joint assembly 150 is inserted into the front end of the first joint assembly 140. The inner cavity of the first joint assembly 140 is provided with a first centering guide structure D1. The rear end of the second joint assembly 150 is provided with a second centering guide structure D2. When the connector 160 locks the second joint assembly 150 with the first joint assembly 140, the second centering guide structure D2 cooperates with the first centering guide structure D1, so that the central axis of the second joint assembly 150 coincides with the central axis of the first joint assembly 140.

[0058] In the above embodiment, through the cooperation between the second centering guide structure D2 and the first centering guide structure D1, it can be further ensured that the second joint assembly 150 and the first joint assembly 140 are coaxially arranged after the connecting member 160 locks the second joint assembly 150 and the first joint assembly 140, thereby facilitating further ensuring the coaxial arrangement of the energy transmission element 110, the inner tube 120, and the outer tube 130.

[0059] In some embodiments, the first centering guide structure D1 and the second centering guide structure D2 are respectively conical structures and match each other.

[0060] In some other embodiments, the first centering guide structure D1 and the second centering guide structure D2 may be other structures that can cooperate to achieve centering guide positioning. For example, the first centering guide structure D1 and the second centering guide structure D2 are step surface structures and match each other.

[0061] In some embodiments, the first joint assembly 140 includes a first barrel 141. The second joint assembly 150 includes a second barrel 151 and an inner tube seal 152 located at the rear end of the second barrel 151. The first centering guide structure D1 is disposed on the inner circumference of the first barrel 141, and the second centering guide structure D2 is disposed on the outer circumference of the inner tube seal 152.

[0062] In some embodiments, the inner tube seal 152 is an elastic member. When the connector 160 locks the second joint assembly 150 and the first joint assembly 140 together, the second central guide structure D2 on the outer circumference of the inner tube seal 152 is squeezed and connected with the first central guide structure D1 on the inner circumference of the first cylinder 141 .

[0063] In some embodiments, the inner tube seal 152 may be made of soft silicone.

[0064] In the above embodiment, the inner tube seal 152 is an elastic member, and the second centering guide structure D2 on the outer circumference of the inner tube seal 152 is squeezed and connected with the first centering guide structure D1 on the inner circumference of the first cylinder 141, thereby ensuring that the inner tube seal 152 has a stronger sealing effect while improving the effect of centering the second joint assembly 150 and the first joint assembly 140.

[0065] like Figure 1 , Figure 2 In some embodiments, the first joint assembly 140 includes a first barrel 141, a sealing plug 142, and a sealing cover 143. The energy transmission element 110 is inserted into the first barrel 141, and the outer circumference of the first barrel 141 is provided with a first interface 1411 extending outward. In this embodiment, the first interface 1411 is used to communicate with the cooling source 200. The sealing cover 143 presses the sealing plug 142 against the rear end of the first barrel 141, and the energy transmission element 110 is inserted into the sealing cover 143 and the sealing plug 142, and is sealed with the sealing plug 142. In some embodiments, the sealing cover 143 is threadedly connected to the rear end of the first barrel 141. In some other embodiments, the sealing cover 143 and the rear end of the first barrel 141 can be detachably connected by other means.

[0066] In some embodiments, the sealing plug 142 may be made of soft silicone.

[0067] like Figure 1 , Figure 2 In some embodiments, the second joint assembly 150 includes a second barrel 151, an inner tube seal 152, an outer tube seal 153, and an outer tube fixing member 154. The inner tube 120 is inserted into the second barrel 151, and the outer tube 130 partially penetrates the second barrel 151. The outer circumference of the second barrel 151 extends outward and is provided with a second interface 1511, and the second interface 1511 is connected to the second channel T2. The inner tube seal 152 is located at the rear end of the second barrel 151. The outer tube seal 153 is located at the front end of the second barrel 151. The outer tube fixing member 154 presses the outer tube seal 153 against the front end of the second barrel 151, and connects the outer tube 130 and the second barrel 151 coaxially. In some embodiments, the outer tube fixing member 154 is threadedly connected to the front end of the second barrel 151. In other embodiments, the outer tube fixing member 154 and the front end of the second barrel 151 can be detachably connected by other means.

[0068] In some embodiments, the outer tube seal 153 may be made of soft silicone.

[0069] like Figures 1 to 4 The ablation catheter 100 of the embodiment of the utility model includes an energy transmission element 110, an inner tube 120, an outer tube 130 and a connection structure for an ablation catheter of any of the aforementioned embodiments, and the connection structure for an ablation catheter includes a first joint assembly 140 and a second joint assembly 150.

[0070] The energy transmission element 110 is used to transmit laser signals. The energy transmission element 110 is, for example, an optical fiber. The inner tube 120 is sleeved on the outer circumference of the energy transmission element 110, and a first channel T1 is formed between the inner wall of the inner tube 120 and the outer wall of the energy transmission element 110. The outer tube 130 is sleeved on the outer circumference of the inner tube 120, and a second channel T2 is formed between the inner wall of the outer tube 130 and the outer wall of the inner tube 120. The front end of the outer tube 130 has a closed portion 131, and the second channel T2 is connected to the inside of the first channel T1 at the closed portion 131.

[0071] The energy transmission element 110 is disposed in the first joint assembly 140. The inner tube 120 is disposed in the second joint assembly 150, and the outer tube 130 partially penetrates the second joint assembly 150, and the front end of the outer tube 130 extends outward from the front end of the second joint assembly 150. The rear end of the inner tube 120 extends to the rear end of the second joint assembly 150.

[0072] The rear end of the second joint assembly 150 is detachably connected to the front end of the first joint assembly 140. A first channel T1 is formed between the inner wall of the inner tube 120 and the outer wall of the energy transmission element 110, and a second channel T2 is formed between the inner wall of the outer tube 130 and the outer wall of the inner tube 120. One of the first joint assembly 140 and the second joint assembly 150 can be connected to the cooling source 200, and the cooling medium provided by the cooling source 200 passes through the first channel T1 and the second channel T2 and is discharged through the other of the first joint assembly 140 and the second joint assembly 150. In this embodiment, the first joint assembly 140 connects the first channel T1 with the cooling source 200, and the cooling medium provided by the cooling source 200 passes through the first channel T1 and the second channel T2 and is discharged through the second joint assembly 150. Figure 3 In the figure, the flow direction of the cooling medium is shown by arrows. In some embodiments, the cooling medium is, for example, a cooling liquid.

[0073] The front end of the energy transmission element 110 and the front end of the inner tube 120 extend to the interior of the closed portion 131, and there is a gap between them and the inner wall of the closed portion 131. The cooling source 200 can provide a cooling medium. In this embodiment, the cooling medium is transported to the front end of the energy transmission element 110 via the first channel T1, so that the front end of the energy transmission element 110 can be cooled. The cooling medium that completes the heat exchange at the front end of the energy transmission element 110 leaves the front end of the energy transmission element 110 through the second channel T2. The second joint assembly 150 can be connected to the medium recovery pool 300, and the cooling medium that completes the heat exchange is transported to the medium recovery pool 300 through the second channel T2.

[0074] According to the ablation catheter 100 of the above embodiment, the ablation catheter 100 includes an energy transmission element 110, an inner tube 120, an outer tube 130, and a connection structure for the ablation catheter, wherein the connection structure includes a first joint assembly 140 and a second joint assembly 150. The energy transmission element 110 is inserted into the first joint assembly 140. The inner tube 120 is inserted into the second joint assembly 150, the outer tube 130 partially penetrates the second joint assembly 150, and the front end of the outer tube 130 extends outward from the front end of the second joint assembly 150. The rear end of the second joint assembly 150 is detachably connected to the front end of the first joint assembly 140. When the ablation catheter 100 needs to be assembled, the energy transmission element 110 is inserted into the first joint assembly 140, the inner tube 120 and the outer tube 130 are inserted into the second joint assembly 150, and then the second joint assembly 150 is connected to the first joint assembly 140, so that the ablation catheter 100 can be quickly assembled. When the ablation catheter 100 needs to be disassembled, the second connector assembly 150 can be disassembled and separated from the first connector assembly 140. The disassembly and assembly process of the ablation catheter 100 is more convenient, which improves the convenience of using the ablation catheter 100 in the ablation system.

[0075] The embodiment of the utility model further provides an ablation system, which includes the ablation catheter 100 of any of the aforementioned embodiments, a cooling source 200 and a medium recovery pool 300 .

[0076] The ablation catheter 100 includes an energy transmission element 110, an inner tube 120, an outer tube 130, and a connection structure for the ablation catheter, wherein the connection structure for the ablation catheter includes a first joint assembly 140 and a second joint assembly 150. The energy transmission element 110 is used to transmit laser signals. The inner tube 120 is sleeved on the outer circumference of the energy transmission element 110, and a first channel T1 is formed between the inner wall of the inner tube 120 and the outer wall of the energy transmission element 110. The outer tube 130 is sleeved on the outer circumference of the inner tube 120, and a second channel T2 is formed between the inner wall of the outer tube 130 and the outer wall of the inner tube 120. The front end of the outer tube 130 has a closed portion 131, and the second channel T2 is connected to the first channel T1 at the closed portion 131.

[0077] The energy transmission element 110 is disposed in the first joint assembly 140. The inner tube 120 is disposed in the second joint assembly 150, and the outer tube 130 partially penetrates the second joint assembly 150, and the front end of the outer tube 130 extends outward from the front end of the second joint assembly 150. The rear end of the inner tube 120 extends to the rear end of the second joint assembly 150.

[0078] The rear end of the second joint assembly 150 is detachably connected to the front end of the first joint assembly 140. A first channel T1 is formed between the inner wall of the inner tube 120 and the outer wall of the energy transmission element 110, and a second channel T2 is formed between the inner wall of the outer tube 130 and the outer wall of the inner tube 120. One of the first joint assembly 140 and the second joint assembly 150 can be connected to the cooling source 200, and the cooling medium provided by the cooling source 200 passes through the first channel T1 and the second channel T2 and is discharged through the other of the first joint assembly 140 and the second joint assembly 150. In this embodiment, the first joint assembly 140 connects the first channel T1 with the cooling source 200, and the cooling medium provided by the cooling source 200 passes through the first channel T1 and the second channel T2 and is discharged through the second joint assembly 150.

[0079] The cooling source 200 is connected to the first joint assembly 140 or the second joint assembly 150 of the ablation catheter 100, and the medium recovery pool 300 is connected to the second joint assembly 150 or the first joint assembly 140 of the ablation catheter 100. In this embodiment, the cooling source 200 is connected to the first channel T1 of the ablation catheter 100. The medium recovery pool 300 is connected to the second channel T2 of the ablation catheter 100. In this embodiment, the cooling source 200 is connected to the first joint assembly 140 of the ablation catheter 100. The medium recovery pool 300 is connected to the second joint assembly 150 of the ablation catheter 100.

[0080] According to the ablation system of the embodiment of the utility model, the ablation catheter 100 includes an energy transmission element 110, an inner tube 120, an outer tube 130, a first joint assembly 140, and a second joint assembly 150. The energy transmission element 110 is inserted into the first joint assembly 140. The inner tube 120 is inserted into the second joint assembly 150, the outer tube 130 partially penetrates the second joint assembly 150, and the front end of the outer tube 130 extends outward from the front end of the second joint assembly 150. The rear end of the second joint assembly 150 is detachably connected to the front end of the first joint assembly 140. When the ablation catheter 100 needs to be assembled, the energy transmission element 110 is inserted into the first joint assembly 140, the inner tube 120 and the outer tube 130 are inserted into the second joint assembly 150, and then the second joint assembly 150 is connected to the first joint assembly 140, so that the ablation catheter 100 can be quickly assembled. When the ablation catheter 100 needs to be disassembled, the second joint assembly 150 is disassembled and separated from the first joint assembly 140. The disassembly and assembly process of the ablation catheter 100 is simpler, thereby improving the convenience of using the ablation catheter 100 in the ablation system.

[0081] In some embodiments, a torsion limiting structure is provided between the second joint assembly 150 and the first joint assembly 140 , and the torsion limiting structure is used to limit the torsion of the second joint assembly 150 relative to the first joint assembly 140 .

[0082] According to the ablation system of the above embodiment, a torsion limiting structure is provided between the second joint assembly 150 and the first joint assembly 140, and the torsion limiting structure is used to limit the torsion of the second joint assembly 150 relative to the first joint assembly 140, so that after the ablation catheter 100 is assembled, the second joint assembly 150 and the first joint assembly 140 will not be torsionally misaligned, thereby improving the position accuracy between the second joint assembly 150 and the first joint assembly 140 and between the energy transmission element 110, the inner tube 120, and the outer tube 130.

[0083] In some embodiments, the cooling source 200 includes a cooling source box 210 and a water pump 220. The cooling source box 210 is connected to the first interface 1411 of the first joint assembly 140 through an inlet pipe 400. The water pump 220 is located on the inlet pipe 400. The water pump 220 is, for example, a peristaltic pump.

[0084] In some embodiments, the medium recovery tank 300 is in communication with the second interface 1511 of the second joint assembly 150 through the outlet pipe 500 .

[0085] In some embodiments, the cooling source 200 further includes a heater 230, and the heater 230 is disposed at the cooling source box 210. In this embodiment, the heater 230 is disposed outside the cooling source box 210. The heater 230 can heat the cooling medium to a suitable temperature first to prevent the cooling medium from irritating the tissue when flowing through the tissue.

[0086] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A connection structure for an ablation catheter, characterized in that: include: A first connector assembly, through which the energy transmission element of the ablation catheter can be inserted; A second joint assembly, wherein the inner tube of the ablation catheter can be inserted into the second joint assembly, the outer tube portion of the ablation catheter is inserted into the second joint assembly, the front end of the outer tube extends outward from the front end of the second joint assembly, and the rear end of the inner tube extends to the rear end of the second joint assembly, The rear end of the second joint assembly is detachably connected to the front end of the first joint assembly, a first channel is formed between the inner wall of the inner tube and the outer wall of the energy transmission element, and a second channel is formed between the inner wall of the outer tube and the outer wall of the inner tube, one of the first joint assembly and the second joint assembly can be connected to a cooling source, and the cooling medium provided by the cooling source passes through the first channel and the second channel and is discharged through the other of the first joint assembly and the second joint assembly.

2. The connection structure for an ablation catheter according to claim 1, characterized in that: Also includes: A connecting piece, which is sleeved on the rear end of the second joint assembly and is detachably connected to the front end of the first joint assembly, and is used to lock and connect the rear end of the second joint assembly with the front end of the first joint assembly.

3. The connection structure for an ablation catheter according to claim 2, characterized in that: A torsion limiting structure is provided between the second joint assembly and the first joint assembly, and the torsion limiting structure is used to limit the torsion of the second joint assembly relative to the first joint assembly.

4. The connection structure for an ablation catheter according to claim 3, characterized in that: The rear end of the second joint component is inserted into the front end of the first joint component, and the front end of the first joint component is provided with a guide groove extending parallel to the axial direction of the first joint component. The outer peripheral surface of the second joint component is provided with a guide protrusion that cooperates with the guide groove, and the guide protrusion is inserted into the corresponding guide groove to limit the torsion of the second joint component relative to the first joint component.

5. The connection structure for an ablation catheter according to claim 3, characterized in that: The rear end of the second joint component is inserted into the front end of the first joint component, the inner cavity of the first joint component is provided with a first centering guide structure, and the rear end of the second joint component is provided with a second centering guide structure. When the connector locks the second joint component and the first joint component together, the second centering guide structure cooperates with the first centering guide structure so that the center axis of the second joint component coincides with the center axis of the first joint component.

6. The connection structure for an ablation catheter according to claim 5, characterized in that: The first centering guide structure and the second centering guide structure are respectively conical structures and match each other.

7. The connection structure for an ablation catheter according to claim 6, characterized in that: The first joint assembly includes a first cylinder, the second joint assembly includes a second cylinder and an inner tube seal located at the rear end of the second cylinder, the first centering guide structure is arranged on the inner circumference of the first cylinder, and the second centering guide structure is arranged on the outer circumference of the inner tube seal; The inner tube seal is an elastic member. When the connector locks the second joint assembly with the first joint assembly, the second centering guide structure on the outer circumference of the inner tube seal is squeezed and connected with the first centering guide structure on the inner circumference of the first cylinder.

8. The connection structure for an ablation catheter according to claim 1, characterized in that: The first joint assembly comprises: A first cylinder, wherein the energy transmission element is disposed through the first cylinder, and a first interface is provided on the outer periphery of the first cylinder extending outward; Sealing plug; The sealing cover presses the sealing plug tightly against the rear end of the first cylinder, and the energy transmission element is passed through the sealing cover and the sealing plug and is sealed with the sealing plug.

9. The connection structure for an ablation catheter according to claim 1, characterized in that: The second joint assembly comprises: a second cylinder, wherein the inner tube is passed through the second cylinder, the outer tube partially passes through the second cylinder, and the outer periphery of the second cylinder extends outwardly to be provided with a second interface, and the second interface is communicated with the second channel; an inner tube seal, located at the rear end of the second cylinder; an outer tube seal, located at the front end of the second cylinder; The outer tube fixing member presses the outer tube sealing member tightly against the front end of the second cylinder body, and connects the outer tube and the second cylinder body coaxially.

10. An ablation catheter, characterized in that: include: Energy transmission components; An inner tube, sleeved on the outer circumference of the energy transmission element, wherein a first channel is formed between the inner wall of the inner tube and the outer wall of the energy transmission element; an outer tube, sleeved on the outer circumference of the inner tube, a second channel is formed between the inner wall of the outer tube and the outer wall of the inner tube, the front end of the outer tube has a closed portion, and the second channel is connected to the first channel at the inner portion of the closed portion; and The connection structure for an ablation catheter as described in any one of claims 1 to 9, wherein the energy transmission element is inserted into the first joint assembly, the inner tube is inserted into the second joint assembly, the outer tube partially inserts into the second joint assembly, the front end of the outer tube extends outward from the front end of the second joint assembly, and the rear end of the inner tube extends to the rear end of the second joint assembly.

11. An ablation system, characterized in that: include: The ablation catheter according to claim 10; A cooling source connected to the first connector assembly or the second connector assembly of the ablation catheter; The medium recovery pool is connected to the second joint component or the first joint component of the ablation catheter.

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