CN-122005069-A - Ablation catheter and ablation system

Abstract

The application relates to an ablation catheter and an ablation system, the ablation catheter includes a tube, a balloon, and a plurality of electrodes. The balloon comprises a balloon body and a plurality of bulges arranged on the surface of the balloon body, wherein the balloon body is connected to the first end of the tube body, the balloon body and the bulges are both arranged to extend along the axial direction of the tube body, a plurality of electrodes are respectively arranged on the bulges, and the electrodes are at least arranged on the surface of one side of the bulges far away from the balloon body. According to the ablation catheter, the electrode can enter the interior of focus tissues with complex structures such as intestinal folds along with the bulge by arranging the electrode on the bulge, so that the bonding effect of the electrode and the focus tissues is improved, the ablation effect of the focus tissues is further improved, and the bonding effect with the focus tissues can be further improved by arranging the balloon body and the bulge to extend along the axial direction of the tube body, so that the balloon body and the corresponding electrode and the focus tissues can have larger contact areas.

Inventors

• WANG SHIJIE
• HE TING
• ZHANG MINGFANG

Assignees

• 苏州赛纳思医疗技术有限公司

Dates

Publication Date

20260512

Application Date

20260309

Claims (17)

1. 1. An ablation catheter, comprising: A tube having opposite first and second ends; The balloon comprises a balloon body and a plurality of bulges arranged on the surface of the balloon body, wherein the balloon body is connected to the first end of the pipe body, the balloon body is arranged into a cylindrical structure extending along the axial direction of the pipe body, and the bulges extend along the axial direction of the pipe body on the surface of the balloon body; A plurality of electrodes, the plurality of electrodes are respectively arranged on the plurality of bulges, and the electrode is arranged on at least one side surface of the bulge away from the balloon body.
2. 2. The ablation catheter of claim 1, wherein the protuberance has a first end and a second end that are axially opposite the tube, an end face of the first end of the protuberance and/or the second end of the protuberance being provided as a bevel; The inclined plane is inclined in such a way that the distance between the end faces of the first end and the second end of the protrusion, which are close to one side edge of the balloon body, is larger than the distance between the end faces of the first end and the second end of the protrusion, which are far away from one side edge of the balloon body.
3. 3. The ablation catheter of claim 1, wherein the balloon body comprises a first body portion, a second body portion, and a third body portion connected in sequence, wherein one end of the first body portion and/or the third body portion remote from the second body portion is connected with the tube; The second body part is arranged to extend in the axial direction of the pipe body to form a cylindrical structure, and the protrusions are at least arranged on the surface of the second body part.
4. 4. The ablation catheter of claim 3, wherein the third body portion is closer to the second end of the tube than the first body portion, and wherein a partial region of the electrode is disposed on a surface of the third body portion.
5. 5. The ablation catheter of claim 3, wherein a length of the second body portion in the axial direction of the tube body is greater than or equal to a sum of lengths of the first body portion and the third body portion in the axial direction of the tube body.
6. 6. The ablation catheter of any of claims 1-5, wherein the extended path of the protuberance along the axial direction of the tube is a straight path or a tortuous path.
7. 7. The ablation catheter of any of claims 1-5, wherein the plurality of projections are spaced apart circumferentially of the tube.
8. 8. The ablation catheter of any of claims 1-5, further comprising: The cable sleeve assembly comprises a lasso and a pull rod, wherein the lasso is arranged in the pipe body in a penetrating manner, the first end of the lasso is provided with an annular cable sleeve part, and the second end of the lasso is connected with the pull rod; The first end of the tube body penetrates through the balloon body and is exposed out of the balloon body, and the cable sleeve part is exposed out of the first end of the tube body.
9. 9. The ablation catheter of claim 8, wherein the cable sheath assembly further comprises a cable sheath disposed within the tube, the lasso disposed within the cable sheath, a first end of the cable sheath being exposed at the first end of the tube, and the cable sheath portion being exposed at the first end of the cable sheath.
10. 10. The ablation catheter of claim 9, wherein the first end of the lasso is exposed at the first end of the cable sleeve and an end of the first end of the lasso is secured to an end face of the first end of the cable sleeve to form the loop-shaped cable sleeve portion at the first end of the lasso.
11. 11. The ablation catheter of any of claims 1-5, wherein the tube body comprises a first tube and a second tube sleeved outside the first tube, a first end of the first tube being exposed at a first end of the second tube; the first end of the second pipe penetrates through and is fixedly connected with one end of the balloon body, the first end of the first pipe penetrates through and is fixedly connected with the other end of the balloon body, and a medium channel communicated with the inside of the balloon body is arranged between the first pipe and the second pipe.
12. 12. The ablation catheter of claim 11, wherein the first end body of the second tube is provided with a media port communicating the media channel with the interior of the balloon body.
13. 13. The ablation catheter of claim 11, further comprising: The handle comprises a handle body and a luer interface arranged on the handle body, wherein a medium cavity is arranged in the handle body, and the medium cavity is communicated with the luer interface; The handle body is connected with the second end of the pipe body, and the medium cavity is communicated with the medium channel.
14. 14. The ablation catheter of claim 13, wherein the handle further comprises a push button disposed on the handle body, the handle body having a slideway disposed thereon, the push button being disposed partially within the slideway; The first pipe and the second pipe are movably matched in the axial direction, the second end of the first pipe is exposed out of the second end of the second pipe, the second end of the second pipe is fixedly connected with the handle body, and the second end of the first pipe is fixedly connected with the push button.
15. 15. The ablation catheter of claim 14, wherein the handle further comprises an elastic member having one end secured to the handle body and the other end secured to the push button.
16. 16. The ablation catheter of claim 11, wherein the tube body further comprises a third tube, the third tube is sleeved outside the second tube, and the third tube is fixedly connected with the second tube; And a wiring channel is arranged between the second pipe and the third pipe, a wire is arranged in the wiring channel, and the wire is connected with the electrode.
17. 17. An ablation system comprising an endoscope and the ablation catheter of any of claims 1-16, a grommet assembly of the ablation catheter for connection with the endoscope.

Description

Ablation catheter and ablation system Technical Field The application relates to the technical field of medical instruments, in particular to an ablation catheter and an ablation system. Background The ablation technology is a minimally invasive treatment means which can accurately and controllably destroy specific focus tissues in a physical or chemical mode and simultaneously protect surrounding normal tissues to the maximum extent. Ablation techniques can be classified into various types according to the principle and mode of action, such as thermal ablation, cold ablation, pulsed electric field ablation, and the like. Taking pulsed electric field ablation as an example, the principle is that a non-thermal, high-voltage pulsed electric field is applied to target tissue to form permanent electroporation on cell membranes, resulting in cell death, so as to achieve ablation treatment of the target tissue. When the ablation technique is applied to the intestinal tract, the ablation effect is poor in some cases due to the complex mucosal structure in the intestinal tract (such as the duodenum). For example, in the above-mentioned pulsed electric field ablation, due to a complex mucosal structure in the intestinal tract, the adhesion effect between the ablation electrode of the conventional ablation catheter and the intestinal tissue is poor, so that the ablation effect is affected. Disclosure of Invention Based on this, it is necessary to provide an ablation catheter and an ablation system, so as to solve the problem that the ablation effect is affected due to poor adhesion effect with the tissue when the conventional ablation catheter is applied to the intestinal tract and the like and has a relatively complex tissue structure. An ablation catheter includes a tube, a balloon, and an electrode. The balloon comprises a balloon body and a plurality of bulges arranged on the surface of the balloon body, the balloon body is connected to the first end of the tube body, the balloon body is arranged into a cylindrical structure extending along the axial direction of the tube body, the bulges extend along the axial direction of the tube body on the surface of the balloon body, the plurality of electrodes are respectively arranged on the bulges, and the electrodes are at least arranged on one side surface of the bulges far away from the balloon body. According to the ablation catheter, the electrode is arranged on the bulge based on the balloon with the bulge, so that the electrode can enter the interior of focus tissues with complex structures such as intestinal folds along with the bulge, the bonding effect of the electrode and the focus tissues is improved, and the ablation effect of a pulse electric field generated by the electrode on the focus tissues is further improved. And based on the balloon body and the bulge, the bulge and the electrode arranged on the bulge can have a large enough area to ensure that the balloon body and the corresponding electrode can have a larger contact area with focus tissues in actual use, so that the laminating effect between the balloon body and the electrode and focus tissues can be further improved. In some embodiments, the protrusion has a first end and a second end opposite to each other in the axial direction of the tube body, and the end face of the first end and/or the second end of the protrusion is provided as a slope, wherein the slope of the slope is in such a direction that the distance between the end face of the first end and the second end of the protrusion near a side edge of the balloon body is greater than the distance between the end face of the first end and the second end of the protrusion far from a side edge of the balloon body. In some embodiments, the balloon body comprises a first body part, a second body part and a third body part which are sequentially connected, one end of the first body part and/or the third body part, which is far away from the second body part, is connected with the tube body, wherein the second body part is arranged to extend to a cylindrical structure along the axial direction of the tube body, and the bulge is at least arranged on the surface of the second body part. In some of these embodiments, the third body portion is closer to the second end of the tube than the first body portion, and a partial region of the electrode is disposed on a surface of the third body portion. In some of these embodiments, the length of the second body portion in the axial direction of the tube body is greater than or equal to the sum of the lengths of the first body portion and the third body portion in the axial direction of the tube body. In some of these embodiments, the extended path of the protrusions along the axial direction of the tube body is a straight path or a tortuous path. In some of these embodiments, a plurality of projections are spaced apart in the circumferential direction of the tube body. In some embodiments, the device furthe