Microwave ablation electrode needle and use method thereof

Abstract

The present invention relates to the technical field of microwave ablation electrode needles, and discloses a microwave ablation electrode needle and a method of using the same, including a handle, wherein the handle is a hollow structure, a needle tube connected to the inside of the handle is fixedly mounted on the outer surface of the handle, a rotating tube is rotatably mounted inside the needle tube, an electrode head is fixedly mounted on the end of the rotating tube away from the handle, a needle head is fixedly mounted on the end of the electrode head away from the rotating tube, and a rotating mechanism for driving the rotating tube to rotate slowly is mounted inside the handle. The present invention drives a driving gear to rotate by a micro-motor, so that the driving gear drives a driven gear meshing with the driving gear to rotate, thereby causing the driven gear to drive the rotating tube fixedly mounted thereon to rotate, so that the rotating tube can drive the electrode head and the needle head to rotate slowly, preventing the electrode head and the needle head from contacting the tissue for a long time, thereby reducing the possibility of adhesion and reducing the pain of the patient when the needle is removed.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave ablation electrode needles, and in particular to a microwave ablation electrode needle and a use method thereof. Background Art

[0002] Thermal ablation has been used to treat solid tumors for more than 10 years. Among the many thermal ablation methods, radiofrequency ablation and microwave ablation are increasingly widely used in clinical practice because of their simple principles and convenient operation. Thermal ablation is mainly used for the treatment of solid organ tumors, cardiac and vascular diseases, etc. Among these two ablation methods, microwave ablation has been increasingly widely used in the clinical treatment of solid tumors in recent years because of its fast heating, high efficiency, short operation time, no need for negative plates, and no influence from the surrounding environment.

[0003] An existing microwave ablation needle (publication number: CN113100926A) has at least the following disadvantages: the above patent uses the mutual cooperation of the all-metal microwave ablation needle body, electrode head, groove and treatment groove, and the ablation field emitted by the electrode head can be transmitted to the lesion through the groove and treatment groove, which greatly improves the accuracy of microwave ablation needle treatment; when the microwave ablation electrode needle is punctured into the lesion for ablation treatment, the electrode head will generate high temperature, which may cause the protein and cell membrane in the human tissue to denature, causing the tissue to become viscous or gelled, thereby causing adhesion between the electrode head and the tissue, increasing the patient's pain when the needle is removed. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a microwave ablation electrode needle and a method of using the same.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A microwave ablation electrode needle comprises a handle which is a hollow structure. A needle tube connected to the interior of the handle is fixedly mounted on the outer surface of the handle. A rotating tube is rotatably mounted inside the needle tube. An electrode head is fixedly mounted on the end of the rotating tube away from the handle. A needle head is fixedly mounted on the end of the electrode head away from the rotating tube. A rotating mechanism for driving the rotating tube to rotate slowly is mounted inside the handle.

[0007] As a further solution of the present invention, the rotating mechanism includes a mounting plate fixedly mounted on the inner wall of the handle, the rotating tube passes through the outer surface of the mounting plate and is rotatably mounted thereon, a driven gear is fixedly mounted on the rotating tube near the outer surface of the mounting plate, a micro motor is fixedly mounted on the outer surface of the mounting plate, the output end of the micro motor passes through the outer surface of the mounting plate and is fixedly mounted with a driving gear, and the driving gear is meshed with the driven gear.

[0008] As a further solution of the present invention, a drug supply mechanism is installed inside the needle tube, and the drug supply mechanism includes a spacer ring fixedly installed on the inner wall of the needle tube, the spacer ring is sleeved on the outer surface of the rotating tube and rotatably installed therewith, the spacer ring is arranged close to the electrode head, a drug storage chamber is formed between the spacer ring and the electrode head, a drug feed hole is penetrated through the end surface of the spacer ring, a connector is fixedly installed on the outer surface of the mounting plate away from the needle head, a drug guide tube is fixedly installed between the connector and the spacer ring, and the connector is connected to the drug feed hole through the drug guide tube, a plurality of drug outlet holes are evenly opened in the circumferential direction at one end of the needle tube close to the electrode head, and a drug delivery assembly is installed on the mounting plate.

[0009] As a further solution of the present invention, the medicine delivery component includes a rubber tube fixedly installed on a connecting head, the rubber tube passes through the outer surface of the handle and is fixedly installed thereon, and the rubber tube is communicated with the connecting head, a swivel is fixedly installed on the outer surface of the swivel tube, and a plurality of bosses are fixedly installed on the outer surface of the swivel at equal intervals in the circumferential direction, the bosses are abutted against the outer surface of the rubber tube, and a limit assembly for supporting and limiting the rubber tube is installed on the outer surface of the mounting plate.

[0010] As a further solution of the present invention, the limiting assembly includes an arc-shaped limiting clamp fixedly mounted on the outer surface of the mounting plate, and the rubber tube is installed between the swivel and the arc-shaped limiting clamp.

[0011] As a further solution of the present invention, an external joint connected to the interior of the rubber tube is fixedly mounted on one end of the rubber tube away from the connecting head.

[0012] As a further solution of the present invention, the outer surfaces of the electrode head and the needle head are both provided with a polymer coating.

[0013] A method for using a microwave ablation electrode needle comprises the following steps:

[0014] S1: Insert the needle into the patient's body and place the needle and electrode head at the tumor lesion;

[0015] S2: The external microwave generator outputs microwave power to the electrode head through a multi-core cable, so that the electrode head ablates the tumor lesion;

[0016] S3: The rotating tube is driven to rotate by the rotating mechanism, so that the rotating tube drives the electrode head and the needle to rotate slowly, preventing the electrode head and the needle from contacting the tissue for a long time and reducing the possibility of adhesion;

[0017] S4: The rotating tube drives the rotating ring to rotate at the same time, so that the convex columns installed on the outer surface of the rotating ring can continuously squeeze the rubber tube in sequence, so that the drug liquid in the external drug supply device can be continuously transported into the drug guide tube through the rubber tube, so that the drug liquid enters the drug storage chamber formed between the partition ring and the electrode head, and then flows out from the multiple drug outlet holes opened at the end of the needle tube to the surrounding of the tumor lesion, so that the drug liquid can have anti-inflammatory, antibacterial and auxiliary chemotherapy effects on the cell tissues around the ablated tumor lesions.

[0018] The beneficial effects of the present invention are:

[0019] 1. The micro motor drives the active gear to rotate, so that the active gear drives the driven gear meshing with it to rotate, and the driven gear drives the rotating tube fixed with it to rotate, so that the rotating tube can drive the electrode head and the needle to rotate slowly, preventing the electrode head and the needle from contacting the tissue for a long time, thereby reducing the possibility of adhesion and the pain of the patient when the needle is removed. In addition, the rotating electrode head and the needle can help to evenly distribute the heat, avoid the formation of hot spots, and ensure the uniformity of ablation;

[0020] 2. The rotating ring is driven to rotate by rotating the rotating tube, so that the convex columns installed on the outer surface of the rotating ring can continuously squeeze the rubber tube in sequence, so that the drug liquid in the external drug supply device can be continuously transported into the drug guide tube through the rubber tube, so that the drug liquid enters the drug storage chamber formed between the septum ring and the electrode head, and then flows out from the multiple drug outlets opened at the end of the needle tube to the surrounding of the tumor lesion, so that the drug liquid can have anti-inflammatory, antibacterial and auxiliary chemotherapy effects on the cell tissues around the ablated tumor lesions, which helps to reduce the risk of recurrence in the lesion area; at the same time, the drug liquid can have a certain lubricating effect on the tissue at the lesion, further reducing the possibility of adhesion between the electrode head and the needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a microwave ablation electrode needle proposed by the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a handle of a microwave ablation electrode needle proposed by the present invention;

[0023] Figure 3 A schematic diagram of the internal structure of a needle tube of a microwave ablation electrode needle proposed by the present invention;

[0024] Figure 4 A schematic diagram of a rotating tube structure of a microwave ablation electrode needle proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of the rubber tube structure of a microwave ablation electrode needle proposed by the present invention;

[0026] Figure 6 for Figure 3A magnified view of the structure at center;

[0027] Figure 7 for Figure 3 A magnified view of the structure at B in the middle;

[0028] Figure 8 for Figure 4 A magnified view of the structure at C in the middle;

[0029] Fig. 9 for Figure 1 Enlarged view of the structure at point D in the middle.

[0030] In the figure: 1. handle; 2. needle tube; 3. rotating tube; 4. spacer ring; 5. electrode head; 6. needle; 7. mounting plate; 8. driven gear; 9. micro motor; 10. driving gear; 11. connector; 12. rubber tube; 13. rotating ring; 14. boss; 15. drug guide tube; 16. arc limit clamp; 17. external connector; 18. drug outlet hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Refer to the attached Figure 1 -Attached Fig. 9 A microwave ablation electrode needle comprises a handle 1, which is a hollow structure. A needle tube 2 connected to the interior of the handle 1 is fixedly installed on the outer surface of the handle 1, a rotating tube 3 is rotatably installed inside the needle tube 2, an electrode head 5 is fixedly installed on the end of the rotating tube 3 away from the handle 1, the electrode head 5 is connected to an external microwave generator through a multi-core cable, the multi-core cable can be threaded from the inside of the rotating tube 3, a needle 6 is fixedly installed on the end of the electrode head 5 away from the rotating tube 3, and a rotating mechanism for driving the rotating tube 3 to rotate slowly is installed inside the handle 1.

[0034] In this embodiment, the rotating mechanism includes a mounting plate 7 fixedly mounted on the inner wall of the handle 1, a rotating tube 3 passes through the outer surface of the mounting plate 7 and is rotatably mounted therewith, a driven gear 8 is fixedly mounted on the outer surface of the rotating tube 3 near the mounting plate 7, a micro motor 9 is fixedly mounted on the outer surface of the mounting plate 7, an output end of the micro motor 9 passes through the outer surface of the mounting plate 7 and is fixedly mounted with a driving gear 10, and the driving gear 10 is meshed with the driven gear 8.

[0035] When performing ablation, the micro motor 9 drives the driving gear 10 to rotate, so that the driving gear 10 drives the driven gear 8 meshing with it to rotate, so that the driven gear 8 drives the rotating tube 3 fixedly mounted thereon to rotate, so that the rotating tube 3 can drive the electrode head 5 and the needle 6 to rotate slowly, preventing the electrode head 5 and the needle 6 from contacting the tissue for a long time, thereby reducing the possibility of adhesion, and rotating the electrode head 5 and the needle 6 can help to evenly distribute heat, avoid the formation of hot spots, and ensure the uniformity of ablation.

[0036] In this embodiment, a drug supply mechanism is installed inside the needle tube 2, and the drug supply mechanism includes a spacer ring 4 fixedly installed on the inner wall of the needle tube 2, the spacer ring 4 is sleeved on the outer surface of the rotating tube 3 and rotatably installed therewith, the spacer ring 4 is arranged near the electrode head 5, and a drug storage chamber is formed between the spacer ring 4 and the electrode head 5, and a drug inlet hole is opened through the end surface of the spacer ring 4, and a connector 11 is fixedly installed on the outer surface of the mounting plate 7 away from the needle head 6, a drug guide tube 15 is fixedly installed between the connector 11 and the spacer ring 4, and the connector 11 is connected to the drug inlet hole through the drug guide tube 15, and a plurality of drug outlet holes 18 are evenly opened in the circumferential direction of one end of the needle tube 2 near the electrode head 5, and a drug delivery component is installed on the mounting plate 7, and the drug delivery component includes A rubber tube 12 is fixedly installed on the connecting head 11, and the rubber tube 12 passes through the outer surface of the handle 1 and is fixedly installed thereon, and the rubber tube 12 is communicated with the connecting head 11, a swivel 13 is fixedly installed on the outer surface of the rotating tube 3, and a plurality of bosses 14 are fixedly installed on the outer surface of the swivel 13 at equal intervals in the circumferential direction, and the bosses 14 are against the outer surface of the rubber tube 12, and a limiting assembly for supporting and limiting the rubber tube 12 is installed on the outer surface of the mounting plate 7, and the limiting assembly includes an arc-shaped limiting clamp 16 fixedly installed on the outer surface of the mounting plate 7, and the rubber tube 12 is installed between the swivel 13 and the arc-shaped limiting clamp 16, and an external joint 17 communicated with the interior of the rubber tube 12 is fixedly installed on the end of the rubber tube 12 away from the connecting head 11.

[0037] Before performing the ablation operation, the external connector 17 is connected to the external drug supply device so that the rotating tube 3 rotates while driving the rotating ring 13 to rotate, so that the convex column 14 installed on the outer surface of the rotating ring 13 can continuously squeeze the rubber tube 12 in sequence, so that the drug liquid in the external drug supply device is continuously transported into the drug guide tube 15 through the rubber tube 12, so that the drug liquid enters the drug storage chamber formed between the partition ring 4 and the electrode head 5, and then flows out to the surrounding area of ​​the tumor lesion through the multiple drug outlet holes 18 opened at the end of the needle tube 2, so that the drug liquid can have anti-inflammatory, antibacterial and auxiliary chemotherapy effects on the cell tissues around the ablated tumor lesions, which helps to reduce the risk of recurrence in the lesion area.

[0038] In this embodiment, the outer surfaces of the electrode head 5 and the needle 6 are both provided with a polymer coating, which is made of a polymer material with a low friction coefficient, and can reduce the adhesion between the electrode head 5 and the needle 6 and the tissue, thereby reducing the adhesion phenomenon that occurs during the operation.

[0039] A method for using a microwave ablation electrode needle comprises the following steps:

[0040] S1: inserting the needle tube 2 into the patient's body and positioning the needle tip 6 and the electrode tip 5 at the tumor focus;

[0041] S2: The external microwave generator outputs microwave power to the electrode head 5 through the multi-core cable, so that the electrode head 5 ablates the tumor lesion;

[0042] S3: The rotating tube 3 is driven to rotate by the rotating mechanism, so that the rotating tube 3 drives the electrode head 5 and the needle 6 to rotate slowly, thereby preventing the electrode head 5 and the needle 6 from contacting with the tissue for a long time and reducing the possibility of adhesion;

[0043] S4: The rotating tube 3 drives the rotating ring 13 to rotate at the same time, so that the convex column 14 installed on the outer surface of the rotating ring 13 can squeeze the rubber tube 12 in sequence, so that the medicine in the external medicine supply device is continuously transported into the drug guide tube 15 through the rubber tube 12, so that the medicine enters the medicine storage chamber formed between the partition ring 4 and the electrode head 5, and then flows out from the multiple medicine outlet holes 18 opened at the end of the needle tube 2 to the surrounding of the tumor lesion, so that the medicine can have anti-inflammatory, antibacterial and auxiliary chemotherapy effects on the cell tissues around the ablated tumor lesions.

[0044] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: when in use, the needle tube 2 is inserted into the patient's body, and the needle head 6 and the electrode head 5 are located at the tumor lesion. At this time, the external microwave generator outputs microwave power to the electrode head 5 through the multi-core cable, so that the electrode head 5 can ablate the tumor lesion;

[0045] When performing ablation, the micro motor 9 drives the driving gear 10 to rotate, so that the driving gear 10 drives the driven gear 8 meshing with it to rotate, so that the driven gear 8 drives the rotating tube 3 fixedly mounted thereon to rotate, so that the rotating tube 3 can drive the electrode head 5 and the needle 6 to rotate slowly, preventing the electrode head 5 and the needle 6 from contacting the tissue for a long time, thereby reducing the possibility of adhesion, and the rotating electrode head 5 and the needle 6 can help to evenly distribute heat, avoid the formation of hot spots, and ensure the uniformity of ablation;

[0046] Before performing the ablation operation, the external connector 17 is connected to the external drug supply device, so that the rotating tube 3 rotates while driving the rotating ring 13 to rotate, so that the convex column 14 installed on the outer surface of the rotating ring 13 can squeeze the rubber tube 12 in sequence, so that the drug liquid in the external drug supply device is continuously peristaltic transported into the drug guide tube 15 through the rubber tube 12, so that the drug liquid enters the drug storage chamber formed between the partition ring 4 and the electrode head 5, and then flows out to the surrounding area of ​​the tumor lesion through the multiple drug outlet holes 18 opened at the end of the needle tube 2, so that the drug liquid can have anti-inflammatory, antibacterial and auxiliary chemotherapy effects on the cell tissues around the ablated tumor lesions, which helps to reduce the risk of recurrence in the lesion area; at the same time, the drug liquid can have a certain lubricating effect on the tissue at the lesion, further reducing the possibility of adhesion between the electrode head 5 and the needle 6.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A microwave ablation electrode needle, comprising a handle (1), wherein the handle (1) is a hollow structure, characterized in that: A needle tube (2) connected to the inside of the handle (1) is fixedly mounted on the outer surface of the handle (1); a rotating tube (3) is rotatably mounted inside the needle tube (2); an electrode head (5) is fixedly mounted on the end of the rotating tube (3) away from the handle (1); a needle head (6) is fixedly mounted on the end of the electrode head (5) away from the rotating tube (3); a rotating mechanism for driving the rotating tube (3) to rotate slowly is mounted inside the handle (1); the rotating mechanism comprises a mounting plate (7) fixedly mounted on the inner wall of the handle (1); the rotating tube (3) passes through the outer surface of the mounting plate (7) and is rotatably mounted thereon; a driven gear (8) is fixedly mounted on the outer surface of the rotating tube (3) close to the mounting plate (7); A micro motor (9) is fixedly mounted on the outer surface of the mounting plate (7); the output end of the micro motor (9) penetrates the outer surface of the mounting plate (7) and is fixedly mounted with a driving gear (10); the driving gear (10) meshes with the driven gear (8); a drug supply mechanism is mounted inside the needle tube (2); the drug supply mechanism comprises a spacer ring (4) fixedly mounted on the inner wall of the needle tube (2); the spacer ring (4) is sleeved on the outer surface of the rotating tube (3) and rotatably mounted therewith; the spacer ring (4) is arranged near the electrode head (5); a drug storage chamber is formed between the spacer ring (4) and the electrode head (5); a drug feed hole is penetrated through the end surface of the spacer ring (4); and the mounting plate (7) is away from the needle head. (6) A connector (11) is fixedly mounted on the outer surface of one side, a drug guide tube (15) is fixedly mounted between the connector (11) and the spacer ring (4), and the connector (11) is connected to the drug inlet hole through the drug guide tube (15), a plurality of drug outlet holes (18) are evenly opened in the circumferential direction of one end of the needle tube (2) close to the electrode head (5), a drug delivery component is mounted on the mounting plate (7), and the drug delivery component includes a rubber tube (12) fixedly mounted on the connector (11), the rubber tube (12) passes through the outer surface of the handle (1) and is fixedly mounted thereto, and the rubber tube (12) is connected to the connector (11), and a swivel (18) is fixedly mounted on the outer surface of the swivel tube (3) 13), a plurality of bosses (14) are fixedly mounted at equal intervals in the circumferential direction on the outer surface of the rotating ring (13), the bosses (14) abut against the outer surface of the rubber tube (12), a limiting assembly for supporting and limiting the rubber tube (12) is mounted on the outer surface of the mounting plate (7), the limiting assembly comprises an arc-shaped limiting clamp (16) fixedly mounted on the outer surface of the mounting plate (7), the rubber tube (12) is mounted between the rotating ring (13) and the arc-shaped limiting clamp (16), an external connector (17) connected to the interior of the rubber tube (12) is fixedly mounted on one end of the rubber tube (12) away from the connector (11), and the outer surfaces of the electrode head (5) and the needle head (6) are both provided with a polymer coating.

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