Mesh basket ablation catheter
By setting slide rails and sliders in push buttons in the ablation catheter handle, the displacement of the sheath tube is controlled, and the problem of unstable ablation catheter is solved when pushing out and contracting the mesh electrode is achieved, and more stable electrode expansion and closing is achieved, improving the therapeutic effect.
Patent Information
- Application Number
- CN202420860033.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-24
AI Technical Summary
Existing ablation catheters are unstable when pushing out and contracting the mesh electrodes, resulting in poor treatment results.
A net basket ablation catheter is designed, with a slider in the handle and a slider in the push button. The slider moves along the slider to control the displacement of the guide sheath tube, thereby stably expanding and closing the net basket electrode.
Through the design of the slide rail and slider, the expansion and contraction of the net basket electrode is ensured to be more stable and the treatment effect is improved.
Smart Images
Figure CN222657174U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a basket ablation catheter. Background Art
[0002] The basket-shaped ablation catheter can treat chronic obstructive pulmonary disease, asthma, interstitial pulmonary fibrosis, cystic fibrosis, bronchiectasis, etc. After the ablation catheter is inserted into the center of the lesion, the output power of the radiofrequency ablation is automatically adjusted by monitoring the changes in parameters such as impedance and temperature of the lesion tissue, so that the lesion tissue quickly produces a large range of coagulative necrosis, thereby achieving the purpose of treatment.
[0003] The existing ablation catheter structure includes a movable handle with a control button, wherein the movement of the button can cause the basket to expand or contract. However, this type of ablation catheter does not have a track when pushing out and contracting the basket through the handle cavity, resulting in the expansion and contraction of the mesh electrode when pushing out the catheter being not very stable. Utility Model Content
[0004] The utility model aims to provide a basket ablation catheter to solve the above-mentioned technical problems.
[0005] To achieve the above-mentioned purpose, the specific technical solution of a basket ablation catheter of the utility model is as follows:
[0006] A basket ablation catheter comprises a handle, a guide sheath and a basket electrode, wherein the handle is provided with a push button, the guide sheath penetrates into the front end of the handle and is fixedly connected to the push button, the guide sheath moves back and forth in the handle along with the push button, the push button comprises a fixed block and a push block, the fixed block is fixedly connected to the push block, the left and right sides of the fixed block are respectively provided with sliders, the handle is provided with corresponding slide rails, the slider slides in the slide rails, thereby controlling the displacement of the guide sheath to control the expansion and contraction of the basket electrode.
[0007] Furthermore, the end of the handle is connected to a conductive cable and an introduction tube, a conductive tube is coaxially arranged inside the guide sheath tube, an inner tube is coaxially arranged inside the conductive tube, a conductive ring is provided at the front end of the conductive tube, the conductive ring is connected to the front end of the conductive tube through a wire, the rear end of the conductive tube is connected to the conductive cable through a push button, one end of the basket electrode is fixedly connected to the conductive ring and is contracted and fixed between the inner tube and the conductive ring, and the inner tube is connected and communicated with the introduction tube.
[0008] Furthermore, the handle includes a left handle and a right handle, and the left handle and the right handle clamp and fix the push button in the handle.
[0009] Furthermore, a clamping groove is provided on the top of the fixing block, and the pushing block is clamped and fixed in the clamping groove of the fixing block.
[0010] Furthermore, a mounting and fixing groove is provided at the bottom of the fixing block, and the guide sheath tube is fixed in the mounting and fixing groove.
[0011] Furthermore, a wire fixing block and a wire groove are provided on the inner side of the handle, the wire fixing block is clamped on the outer side of the slide rail and is located at the rear end relatively to the push button, and the wire fixing block is used to fix the conductive cable and the conductive tube as well as the inner tube.
[0012] Furthermore, a wire groove is provided inside the end of the handle, and a wire hole and a catheter hole are provided on the tail surface of the handle. The wire hole and wire groove are used to fix and guide the conductive cable to pass through, and the catheter hole is used to guide the introduction tube to pass through and fix it.
[0013] The utility model of a mesh basket ablation catheter has the following advantages: the mesh basket ablation catheter of the utility model has a slide rail in the handle, a slider in the push button, and the slider moves along the slide rail, thereby ensuring the stability of the extension and retraction of the mesh basket electrode. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the overall structure of the basket ablation catheter of the utility model;
[0015] Figure 2 This is a cross-sectional view of the basket ablation catheter of the utility model;
[0016] Figure 3 This is an exploded view of the basket ablation catheter structure of the utility model;
[0017] Explanation of the markings in the figure: 1. Handle; 2. Guide sheath; 3. Basket electrode; 4. Push button; 41. Fixing block; 411. Fixing slot; 412. Slider; 42. Push block; 5. Conductive tube; 51. Conductive ring; 6. Inner tube; 7. Conductive cable; 8. Introduction tube; 9. Wire fixing block; 10. Wire slot; 11. Left handle; 12. Right handle; 13. Slide rail; 14. Wire hole; 15. Catheter hole. DETAILED DESCRIPTION
[0018] In order to better understand the purpose, structure and function of the utility model, a basket ablation catheter of the utility model is further described in detail below in conjunction with the accompanying drawings.
[0019] like Figure 1-3 As shown, a basket ablation catheter of the utility model comprises a handle 1, a guide sheath 2 and a basket electrode 3. The handle 1 is provided with a push button 4. The guide sheath 2 penetrates the front end of the handle 1 and is fixedly connected to the push button 4. The guide sheath 2 can move forward and backward in the handle 1 along with the push button 4. The end of the handle 1 is connected to a conductive cable 7 and an introduction tube 8. Figure 2As shown, a conductive tube 5 is coaxially arranged inside the guide sheath tube 2, an inner tube 6 is coaxially arranged inside the conductive tube 5, a conductive ring 51 is provided at the front end of the conductive tube 5, the conductive ring 51 is connected to the front end of the conductive tube 5 through a wire, the rear end of the conductive tube 5 passes through the push button 4 and is connected to the conductive cable 7, one end of the basket electrode 3 is fixedly connected to the conductive ring 51, and is fixed between the inner tube 6 and the conductive ring 51 by shrinking through an extrusion process, the inner tube 6 is connected and communicated with the introduction tube 8, and the introduction tube 8 is used to access liquid or guide wire.
[0020] Specifically, the handle 1 includes a left handle 11 and a right handle 12, and the left handle 11 and the right handle 12 clamp the push button 4 in the handle 1. The push button 4 includes a fixed block 41 and a push block 42. The fixed block 41 is fixedly connected to the push block 42. The top of the fixed block 41 is provided with a clamping groove, and the push block 42 is clamped and fixed in the clamping groove of the fixed block 41. The bottom of the fixed block 41 is provided with an installation fixing groove 411, and the guide sheath tube 2 can be installed and fixed in the installation fixing groove 411. The fixation here can be achieved by bonding or other fixing methods. Slide blocks 412 are respectively provided on the left and right sides of the fixed block 41. Corresponding slide rails 13 are provided in the left handle 11 and the right handle 12. The slide block 412 can slide freely in the slide rail 13 to adjust the displacement of the push button 4 in the handle, thereby controlling the displacement of the guide sheath tube 2 to control the expansion and retraction of the basket electrode 3. By providing the slide block 412 and the slide rail 13, the extension and retraction of the guide sheath tube 2 is made more stable.
[0021] A wire fixing block 9 and a wire groove 10 are provided on the inner side of the handle 1. The wire fixing block 9 is clamped on the outer side of the slide rail 13 and is located at the rear end of the push button 4. The wire fixing block 9 is used to fix the conductive cable 7 and the conductive tube 5 and the inner tube 6. The fixing method here can be bonding or clamping. A wire groove 10 is provided inside the end of the handle 1. A wire hole 14 and a catheter hole 15 are provided on the tail surface of the handle 1. The wire hole 14 and the wire groove 10 are used to fix and guide the conductive cable 7 to pass through. The catheter hole 15 is used to guide the introduction tube 8 to pass through and fix it.
[0022] The basket ablation catheter of the utility model needs to be used in conjunction with a bronchoscope or a digestive endoscope, and the operation steps are as follows:
[0023] Step 1: The operator pushes the push button 4 to the front end, the guide sheath 2 completely covers the basket electrode 3, and inserts the guide sheath 2 into the channel of the bronchoscope or digestive endoscope;
[0024] Step 2: insert the bronchoscope or digestive endoscope through the natural cavity of the human body to the end of the main channel closest to the lesion area, and push the handle 1 to make the guide sheath 2 reach the lesion area of the branch channel;
[0025] Step 3: Slowly push the push button 4 backward to expose the basket electrode 3;
[0026] Step 4: The generator is connected to the conductive cable 7 and outputs steep pulse energy through the basket electrode 3 to ablate the lesion;
[0027] Step 5: After ablation is completed, slowly push the push button 4 forward, and the guide sheath 2 covers the basket electrode 3, and finally withdraws it together with the bronchoscope or digestive endoscope.
[0028] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.
Claims
1. A basket ablation catheter, comprising a handle (1), a guide sheath (2) and a basket electrode (3), wherein the handle (1) is provided with a push button (4), the guide sheath (2) penetrates into the front end of the handle (1) and is fixedly connected to the push button (4), and the guide sheath (2) moves forward and backward in the handle (1) along with the push button (4), characterized in that: The push button (4) comprises a fixed block (41) and a push block (42), wherein the fixed block (41) is fixedly connected to the push block (42), and sliders (412) are respectively provided on the left and right sides of the fixed block (41), and a corresponding slide rail (13) is provided in the handle (1), and the slider (412) slides in the slide rail (13), thereby controlling the displacement of the guide sheath tube (2) and controlling the expansion and retraction of the basket electrode (3).
2. The basket ablation catheter according to claim 1, characterized in that: The end of the handle (1) is connected to a conductive cable (7) and an introduction tube (8); a conductive tube (5) is coaxially arranged inside the guide sheath tube (2); an inner tube (6) is coaxially arranged inside the conductive tube (5); a conductive ring (51) is provided at the front end of the conductive tube (5); the conductive ring (51) is connected to the front end of the conductive tube (5) via a wire; the rear end of the conductive tube (5) is connected to the conductive cable (7) through a push button (4); one end of the basket electrode (3) is fixedly connected to the conductive ring (51) and is contracted and fixed between the inner tube (6) and the conductive ring (51); the inner tube (6) is connected to and communicates with the introduction tube (8).
3. The basket ablation catheter according to claim 1, characterized in that: The handle (1) comprises a left handle (11) and a right handle (12), and the left handle (11) and the right handle (12) clamp and fix the push button (4) in the handle (1).
4. The basket ablation catheter according to claim 1, characterized in that: A clamping groove is provided on the top of the fixing block (41), and the pushing block (42) is clamped and fixed in the clamping groove of the fixing block (41).
5. The basket ablation catheter according to claim 1, characterized in that: The bottom of the fixing block (41) is provided with a mounting fixing groove (411), and the guide sheath tube (2) is fixed in the mounting fixing groove (411).
6. The basket ablation catheter according to claim 2, characterized in that: A wire fixing block (9) and a wire groove (10) are provided on the inner side of the handle (1). The wire fixing block (9) is clamped on the outer side of the slide rail (13) and is located at the rear end opposite to the push button (4). The wire fixing block (9) is used to fix the conductive cable (7) and the conductive tube (5) and to fix the inner tube (6).
7. The basket ablation catheter according to claim 2, characterized in that: A wire groove (10) is provided inside the end of the handle (1), and a wire hole (14) and a catheter hole (15) are provided on the tail surface of the handle (1). The wire hole (14) and the wire groove (10) are used to fix and guide the conductive cable (7) to pass through, and the catheter hole (15) is used to guide and fix the introduction tube (8).