Microwave ablation catheter for pulmonary nodule ablation

Abstract

The utility model relates to a microwave ablation catheter for pulmonary nodule ablation. The microwave ablation catheter comprises a radiator and a catheter assembly. The catheter assembly comprises a catheter sleeve, an inner channel, a connecting section and a tip head, the inner channel is formed in the middle of the catheter sleeve, the connecting section is arranged at one end of the catheter sleeve, the tip head is arranged on the side, away from the inner channel, of the connecting section, and a cooling groove is formed in the side, close to the inner channel, of the connecting section. The connecting sleeve and the elastic ball facilitate relative bending or returning of the two elastic rods, the tensioning degree between the elastic rods is changed by adjusting the size of the elastic ball, the returning force after the ablation catheter is bent can be controlled, and therefore different operation requirements can be met according to different conditions.

Description

Technical Field

[0001] The invention belongs to the field of ablation catheters, and in particular relates to a microwave ablation catheter for ablation of pulmonary nodules. Background Art

[0002] Pulmonary nodules refer to focal round dense shadows of various sizes, with clear or blurred edges and a diameter of less than or equal to 3 cm on lung images.

[0003] The existing relevant patent, patent number CN201621035233.6, "A flexible microwave ablation antenna and a microwave ablation needle using the same", has the following features: "The ablation needle can maintain relatively good flexibility, can pass through the respiratory tract to penetrate deep into the lungs for ablation, avoid perforation in the lungs, and thus reduce the risk of postoperative complications such as pneumothorax and lung inflammation; can effectively inhibit microwaves from propagating backward along the ablation needle shaft, concentrate microwaves at the needle head, obtain an ideal ablation area, and achieve good ablation effects; the simulation diagram of the ablation area shows that the ablation area is a spherical area;

[0004] It can ensure that the circulating water reaches the head of the ablation needle, fully cool the ablation needle, and avoid the ablation needle being damaged or scalded by excessive temperature. However, it still has some shortcomings, such as the water inlet pipe and the outer sleeve are not separated, which may easily cause friction and damage between the water inlet pipe and the outer sleeve. The water inlet pipe is also prone to bending, which may cause the cooling liquid to be trapped and unable to flow smoothly. Therefore, a microwave ablation catheter for ablation of pulmonary nodules is proposed. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the following technical problems in the prior art: the water inlet pipe and the outer sleeve are not separated, which may easily cause friction and damage between the water inlet pipe and the outer sleeve, and part of the water inlet pipe may be easily bent, causing the cooling liquid to be trapped and unable to flow smoothly.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions, including a radiator and a catheter assembly;

[0008] The catheter assembly comprises a catheter sleeve, an inner channel, a connecting section and a tip, wherein the inner channel is provided in the middle of the catheter sleeve, a connecting section is provided at one end of the catheter sleeve, a tip is provided on a side of the connecting section away from the inner channel, and a cooling groove is provided on a side of the connecting section close to the inner channel;

[0009] A plurality of support members are arranged on the inner side of the inner channel, and the support members include elastic rods, connecting seats and connecting sleeves. Each group of support members is composed of elastic rods connected end to end, and a connecting sleeve is connected between every two adjacent elastic rods. The middle part of the elastic rod is connected to the inner side of the catheter sleeve through the connecting seat.

[0010] There are two cooling mechanisms which are respectively located at two sides of the inner channel. The cooling mechanisms include water supply pipes, and one end of the water supply pipes extends into the cooling groove.

[0011] As a preferred technical solution of a microwave ablation catheter for ablation of pulmonary nodules, a plurality of extension blocks are installed on the inner wall of the cooling groove, and the extension blocks are made of copper or silver;

[0012] The extension block increases the contact area with the liquid in the cooling tank and improves the cooling effect.

[0013] As a preferred technical solution of a microwave ablation catheter for ablation of pulmonary nodules, the support member further comprises an elastic ball and a connecting frame, the two ends of the elastic rod are respectively fixedly connected to a connecting frame, the two ends of the connecting sleeve are respectively fixedly connected to a connecting frame, an elastic ball is arranged on the inner side of the connecting sleeve, and the elastic ball and the connecting sleeve are both made of rubber;

[0014] The connecting sleeve and the elastic ball facilitate the relative bending or straightening of the two elastic rods. The tension between the elastic rods can be changed by adjusting the size of the elastic ball according to different situations to meet different surgical requirements.

[0015] As a preferred technical solution of a microwave ablation catheter for ablation of pulmonary nodules, the support member further comprises a second connecting ring, the outer side of each of the elastic rods is sleeved with the second connecting ring, the elastic rods and the inner wall of the catheter sleeve are connected with a rubber rod, and the elastic rods are located at a quarter of the inner channel near the end;

[0016] The elastic rod and the second connecting ring can slide relative to each other, so that the second connecting ring makes the elastic rod always close to the inner wall of the catheter sleeve but does not collide with the inner wall of the elastic rod.

[0017] As a preferred technical solution of a microwave ablation catheter for ablation of pulmonary nodules, a fixing ring is installed inside one side of the connecting section, the fixing ring is plugged into the water supply pipe, and the inner cavity of the fixing ring is fixedly connected to the water supply pipe through a connecting ring.

[0018] The fixing ring fixes the elastic rod and the part of the water supply pipe located inside the catheter sleeve.

[0019] As a preferred technical solution of a microwave ablation catheter for ablation of pulmonary nodules, a protective sleeve is arranged in the middle of the inner channel, a nylon rope distributed in an annular pattern is arranged inside the protective sleeve, and a coaxial line is arranged in the middle of the protective sleeve;

[0020] The protective sleeve prevents the coaxial line from contacting the outside world, so that the coaxial line is protected. The nylon rope improves the toughness and tensile strength of the protective sleeve.

[0021] As a preferred technical solution of a microwave ablation catheter for ablation of pulmonary nodules, the cooling mechanism further includes a fixing sleeve and a connecting beam, a plurality of fixing sleeves are fixedly installed on the water supply pipe, two connecting beams are connected between the fixing sleeve and the elastic rod, the connecting beams are arc-shaped, and the material of the connecting beams is polyurethane;

[0022] The connecting beam and the fixing sleeve enable the water supply pipe to be bent at a certain angle while maintaining the patency of the inner cavity of the water supply pipe, thereby preventing the cooling liquid from being trapped due to bending of part of the water supply pipe.

[0023] The microwave ablation catheter for ablation of pulmonary nodules of the present invention has the following beneficial effects: the connecting sleeve and the elastic ball facilitate the relative bending or return of the two elastic rods, and the tension between the elastic rods can be changed by adjusting the size of the elastic ball, so that the return force of the ablation catheter after bending can be controlled, thereby adapting to different surgical requirements according to different situations;

[0024] The elastic rod and the second connecting ring can slide relative to each other, so that the second connecting ring makes the elastic rod always close to the inner wall of the catheter sleeve, but will not collide with the inner wall of the elastic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0026] Figure 1 It is a front structural schematic diagram of the present invention;

[0027] Figure 2 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0028] Figure 3 For the present invention Figure 1 A schematic diagram of the local enlarged structure of part B;

[0029] Figure 4 For the present invention Figure 1 Schematic diagram of the local enlarged structure of part C in the middle.

[0030] Figure numerals: catheter assembly - 100, catheter sleeve - 101, inner channel - 102, connecting section - 103, tip head - 104, cooling groove - 105, fixing ring - 106, extension block - 107, protective sleeve - 108, nylon rope - 109, coaxial line - 110, support member - 200, elastic rod - 201, connecting seat - 202, connecting ring two - 203, connecting sleeve - 204, elastic ball - 205, connecting frame - 206, cooling mechanism - 300, water supply pipe - 301, fixing sleeve - 302, connecting beam - 303. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] like Figure 1-4 As shown, the present invention provides a microwave ablation catheter for ablation of pulmonary nodules, including a radiator and a catheter assembly 100;

[0036] The catheter assembly 100 includes a catheter sleeve 101, an inner channel 102, a connecting section 103 and a tip 104. The inner channel 102 is provided in the middle of the catheter sleeve 101, and the connecting section 103 is provided at one end of the catheter sleeve 101. The tip 104 is arranged on a side of the connecting section 103 away from the inner channel 102, and a cooling groove 105 is provided on a side of the connecting section 103 close to the inner channel 102.

[0037] A plurality of support members 200 are arranged inside the inner channel 102, and the support members 200 include elastic rods 201, connecting seats 202 and connecting sleeves 204. Each group of support members 200 is composed of elastic rods 201 connected end to end, and a connecting sleeve 204 is connected between every two adjacent elastic rods 201. The middle part of the elastic rod 201 is connected to the inner side of the catheter sleeve 101 through the connecting seat 202.

[0038] There are two cooling mechanisms 300 , which are respectively located at two sides of the inner channel 102 . The cooling mechanisms 300 include water supply pipes 301 , and one end of the water supply pipes 301 extends into the cooling groove 105 .

[0039] The inner wall of the cooling tank 105 is provided with a plurality of extension blocks 107, and the extension blocks 107 are made of copper or silver;

[0040] The extension block 107 increases the contact area with the liquid in the cooling tank 105, thereby improving the cooling effect.

[0041] The support member 200 further includes an elastic ball 205 and a connecting frame 206. The two ends of the elastic rod 201 are respectively fixedly connected to a connecting frame 206. The two ends of the connecting sleeve 204 are respectively fixedly connected to a connecting frame 206. The inner side of the connecting sleeve 204 is provided with an elastic ball 205. Both the elastic ball 205 and the connecting sleeve 204 are made of rubber.

[0042] The connecting sleeve 204 and the elastic ball 205 facilitate the relative bending or straightening of the two elastic rods 201. The tension between the elastic rods 201 can be changed by adjusting the size of the elastic ball 205 according to different situations to meet different surgical requirements.

[0043] The support member 200 further includes a second connecting ring 203. The outer side of each elastic rod 201 is sleeved with the second connecting ring 203. The elastic rod 201 is connected to the inner wall of the catheter sleeve 101 by a rubber rod. The elastic rod 201 is located at a quarter of the inner channel 102 near the end.

[0044] The elastic rod 201 and the second connecting ring 203 can slide relative to each other, so that the second connecting ring 203 allows the elastic rod 201 to always be close to the inner wall of the catheter sleeve 101 but will not collide with the inner wall of the elastic rod 201 .

[0045] A fixing ring 106 is installed inside one side of the connecting section 103, and the fixing ring 106 is plugged into the water supply pipe 301. The inner cavity of the fixing ring 106 is fixedly connected to the water supply pipe 301 through a connecting ring 1.

[0046] The fixing ring 106 fixes the elastic rod 201 and the water supply pipe 301 located inside the catheter sleeve 101 .

[0047] A protective cover 108 is installed in the middle of the inner channel 102, a nylon rope 109 is installed in a circular pattern inside the protective cover 108, and a coaxial line 110 is installed in the middle of the protective cover 108;

[0048] The protective cover 108 prevents the coaxial line 110 from contacting the outside world, so that the coaxial line 110 is protected. The nylon rope 109 improves the toughness and tensile strength of the protective cover 108 .

[0049] The cooling mechanism 300 further includes a fixing sleeve 302 and a connecting beam 303. A plurality of fixing sleeves 302 are fixedly mounted on the water supply pipe 301. Two connecting beams 303 are connected between the fixing sleeve 302 and the elastic rod 201. The connecting beams 303 are arc-shaped and made of polyurethane.

[0050] The connecting beam 303 and the fixing sleeve 302 enable the water supply pipe 301 to be bent at a certain angle while keeping the inner cavity of the water supply pipe 301 unobstructed, thereby preventing the cooling liquid from being trapped due to partial bending of the water supply pipe 301 .

[0051] It includes: a radiator, used for emitting microwaves for ablation;

[0052] The coaxial line 110 is used to transmit the microwaves for ablation generated by the microwave generator to the radiator.

[0053] The specific implementation method is as follows: the water supply pipe 301 is connected to the water outlet and the water inlet of the circulation machine respectively, so that the cooling water in the water supply pipe 301 circulates between the two water supply pipes 301 and the cooling tank 105, and the opening of the cooling tank 105 can be sealed with a rubber plug or other structure;

[0054] The radiator is arranged in the sharp tip 104. After the sharp tip 104 reaches the nodules in the alveoli, microwaves are released to destroy the nodules. After repair, the part will recover.

[0055] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A microwave ablation catheter for ablation of pulmonary nodules, comprising: A radiator and catheter assembly (100), characterized in that: the catheter assembly (100) comprises a catheter sleeve (101); An inner channel (102) is provided in the middle of the catheter sleeve (101), a connecting section (103) is provided at one end of the catheter sleeve (101), a pointed tip (104) is provided on a side of the connecting section (103) away from the inner channel (102), and a cooling groove (105) is provided on a side of the connecting section (103) close to the inner channel (102); A plurality of support members (200) are arranged on the inner side of the inner channel (102), the support members (200) comprising elastic rods (201), each group of support members (200) being composed of elastic rods (201) connected end to end, a connecting sleeve (204) being connected between every two adjacent elastic rods (201), and the middle part of the elastic rod (201) being connected to the inner side of the catheter sleeve (101) via a connecting seat (202); There are two cooling mechanisms (300) respectively located on both sides of the inner channel (102), and the cooling mechanism (300) comprises a water supply pipe (301), one end of which extends into the cooling groove (105).

2. A microwave ablation catheter for ablation of pulmonary nodules according to claim 1, characterized in that: A plurality of extension blocks (107) are arranged on the inner side wall of the cooling groove (105), and the extension blocks (107) are made of copper or silver.

3. A microwave ablation catheter for ablation of pulmonary nodules according to claim 2, characterized in that: The support member (200) further comprises an elastic ball (205) and a connecting frame (206), the two ends of the elastic rod (201) are respectively fixedly connected to a connecting frame (206), the two ends of the connecting sleeve (204) are respectively fixedly connected to a connecting frame (206), and the elastic ball (205) is arranged on the inner side of the connecting sleeve (204).

4. A microwave ablation catheter for ablation of pulmonary nodules according to claim 3, characterized in that: The support member (200) further comprises a second connecting ring (203), the outer side of each of the elastic rods (201) is sleeved with the second connecting ring (203), and the elastic rods (201) and the inner wall of the catheter sleeve (101) are connected by a rubber rod.

5. A microwave ablation catheter for ablation of pulmonary nodules according to claim 4, characterized in that: A fixing ring (106) is arranged inside one side of the connecting section (103), the fixing ring (106) is plugged into the water supply pipe (301), and the inner cavity of the fixing ring (106) is fixedly connected to the water supply pipe (301) via a connecting ring.

6. A microwave ablation catheter for ablation of pulmonary nodules according to claim 5, characterized in that: A protective sleeve (108) is arranged in the middle of the inner channel (102), a nylon rope (109) distributed in an annular pattern is arranged inside the protective sleeve (108), and a coaxial line (110) is arranged in the middle of the protective sleeve (108).

7. The microwave ablation catheter for ablation of pulmonary nodules according to claim 1, characterized in that: The cooling mechanism (300) further comprises a fixing sleeve (302) and a connecting beam (303); a plurality of fixing sleeves (302) are fixedly mounted on the water supply pipe (301); two connecting beams (303) are connected between the fixing sleeve (302) and the elastic rod (201); the connecting beam (303) is arc-shaped and is made of polyurethane.

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