A balloon catheter for treating mitral valve calcification

Abstract

The present invention relates to the technical field of medical devices, and provides a balloon catheter for treating mitral valve calcification, comprising: a tube body, and a balloon sleeved outside the tube body; the balloon is arranged at a position close to the distal end of the tube body, the cross-sectional shape of the balloon after expansion is not circular, and at least two electrode assemblies are fixedly arranged inside the balloon; the balloon catheter of the present invention is provided with a first connecting piece, a second connecting piece and a sliding button, so that the balloon of the balloon catheter is bent between -90° and 90° relative to the tube body, which is convenient for reaching the treatment site and improves the refinement of the operation; the present invention is also provided with a developing point, which can be developed under X-ray and mark the working section length of the balloon catheter; a plurality of electrode assemblies are also arranged inside the balloon of the present invention, and the special-shaped cross-section of the balloon after expansion prevents blood from blocking the mitral valve outflow tract.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a balloon catheter for treating mitral valve calcification. Background Art

[0002] Mitral valve calcification is a process that results in calcium deposits in and around the fibrous base of the mitral valve, with an incidence of 10% in the 60-year-old population and up to 33% in the 90-year-old population. Mitral valve annular calcification leads to mitral valve dysfunction—mitral stenosis or regurgitation, atrial fibrillation, stroke, infective endocarditis, and death; in the context of an aging population, there is an increasing number of patients with mitral valve dysfunction and concomitant MAC.

[0003] With the application of shock wave technology in blood vessels, it has been clinically proven to have significant effects on vascular calcification. Shock wave technology can be used to treat mitral valve ring calcification, thereby using minimally invasive surgery to restore mitral valve function to the greatest extent and avoid surgery and replacement. However, percutaneous treatment requires some implants and there is a possibility of restenosis. A single shock wave treatment can easily block the mitral valve outflow tract and easily cause the patient's death. In addition, since there are multiple chordae tendineae connecting under the mitral valve, during the intervention process, the position of the instrument needs to be controlled to prevent the instrument from entering the middle of the chordae tendineae and damaging the chordae tendineae during operation or withdrawal.

[0004] Therefore, there is an urgent need for a balloon catheter for treating mitral valve calcification that avoids blood blockage and can accurately adjust the balloon position. Summary of the invention

[0005] The purpose of the present invention is to provide a balloon catheter for treating mitral valve calcification in view of the deficiencies in the prior art and the risk control in the process.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A balloon catheter for treating mitral valve calcification is provided, characterized in that it comprises: a tube body and a balloon sleeved outside the tube body; wherein:

[0008] The balloon is arranged at a position close to the distal end of the tube body, the cross-sectional shape of the balloon after expansion is not circular, and at least two electrode assemblies are fixedly arranged inside the balloon.

[0009] Preferably, the cross-sectional shape of the balloon after expansion is an ellipse, and two electrode assemblies are fixedly disposed inside the balloon, and the two electrode assemblies are respectively disposed near end points of the long axis of the ellipse.

[0010] Preferably, the cross-sectional shape of the balloon after expansion is a triangle, and three electrode assemblies are fixedly disposed inside the balloon, and the three electrode assemblies are respectively disposed near end points of the triangle.

[0011] Preferably, the cross-sectional shape of the balloon after expansion is a quadrilateral, and four electrode assemblies are fixedly disposed inside the balloon, and the four electrode assemblies are respectively disposed near end points of the quadrilateral.

[0012] More preferably, the electrode assembly comprises: a connecting section, an electrode body, and a protective sleeve; wherein,

[0013] The proximal end of the connecting section is fixedly arranged at the inner proximal end of the balloon, and the connecting section gradually moves away from the tube body from the proximal end of the connecting section to the distal end of the connecting section;

[0014] The electrode body is fixedly arranged at the distal end of the connecting section;

[0015] The protective sleeve is fixedly sleeved on the outside of the electrode body, and the protective sleeve is used to wrap the positive electrode wire of the electrode body and the negative electrode wire of the electrode body.

[0016] More preferably, the tube body comprises: an adjustment section disposed at the proximal end of the balloon; wherein,

[0017] The adjustment section can make the balloon bend between -90° and 90° relative to the tube body.

[0018] Preferably, it also includes: a handle sleeved outside the proximal end of the tube body; wherein,

[0019] The handle is provided with a slide groove, a slide button is slidably arranged in the slide groove, and a pulley is rotatably arranged at the proximal end of the slide groove;

[0020] The sliding button is fixedly provided with a first connecting member and a second connecting member;

[0021] One end of the first connecting member is fixedly connected to the sliding button, and the other end of the first connecting member is fixedly connected to the distal end of the adjusting section after passing around the pulley;

[0022] One end of the second connecting member is fixedly connected to the sliding button, and the other end of the second connecting member is fixedly connected to the distal end of the adjusting section;

[0023] The first connecting member and the second connecting member are symmetrically arranged relative to the axis center of the tube body.

[0024] More preferably, the adjustment section comprises: an inner layer provided with a plurality of chambers, a middle layer sleeved outside the inner layer, and an outer layer sleeved outside the middle layer; wherein,

[0025] A third connecting member is fixedly disposed in at least two of the plurality of chambers;

[0026] The first connecting member and the second connecting member are fixedly connected to the third connecting member through two symmetrical chambers of the inner layer.

[0027] Preferably, the tube body comprises: an inner tube, an outer tube, and a tip; wherein,

[0028] The inner tube is fixedly sleeved inside the outer tube, the proximal end of the inner tube extends to the outside of the proximal end of the outer tube, a handle is fixedly sleeved outside the proximal end of the inner tube, the distal end of the inner tube extends to the outside of the distal end of the outer tube, and the balloon is fixedly sleeved outside the distal end of the inner tube;

[0029] The distal end of the outer tube is provided with an adjustment section, and the adjustment section can make the balloon bend between -90° and 90° relative to the outer tube;

[0030] The tip is fixedly disposed at the distal end of the inner tube.

[0031] Preferably, the balloon comprises: a working section, a first tapered section disposed at the proximal end of the working section, and a second tapered section disposed at the distal end of the working section; wherein,

[0032] The longitudinal section of the working section is in a rectangular shape, and the proximal end and the distal end of the working section are provided with developing points for indicating the length of the working section.

[0033] Preferably, the length of the adjustment section 111 is 3 cm to 7 cm.

[0034] Preferably, the adjustment section 111 is made of flexible material;

[0035] Preferably, the inner layer 1111 is made of a flexible polymer material;

[0036] Preferably, the middle layer 1112 is made of stainless steel spring material;

[0037] Preferably, the outer layer 1113 is made of flexible polymer material.

[0038] Preferably, the connecting section 221 is made of elastic metal material and has a shape memory function;

[0039] Preferably, the third connecting member is a metal pull ring.

[0040] Preferably, the outer tube 12 except the adjusting section 111 is made of stainless steel.

[0041] Preferably, the tip 13 is made of flexible material;

[0042] More preferably, the hardness of the tip 13 is 20D-50D.

[0043] Preferably, the connecting section 221 is made of alloy material.

[0044] Preferably, the first connecting member 321 is a metal wire.

[0045] Preferably, the first connecting member 321 is a metal wire.

[0046] The present invention adopts the above technical solution, and has the following technical effects compared with the prior art:

[0047] The balloon catheter of the present invention is provided with a first connecting piece, a second connecting piece and a sliding button, so that the balloon of the balloon catheter is bent between -90° and 90° relative to the tube body, which is convenient for reaching the treatment site and improves the refinement of the operation; the present invention is also provided with a developing point, which can be developed under X-ray and mark the working section length of the balloon catheter; the balloon of the present invention is also provided with a plurality of electrode assemblies to prevent blood from blocking the mitral valve outflow tract. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the working state of a balloon catheter in one embodiment of the present invention;

[0049] Figure 2 A schematic diagram of the basic structure of a balloon catheter in one embodiment of the present invention;

[0050] Figure 3 It is a schematic diagram of a longitudinal section of a balloon of a balloon catheter in one embodiment of the present invention;

[0051] Figure 4 It is a schematic cross-sectional view of an adjustment section of a balloon catheter in one embodiment of the present invention;

[0052] Figure 5 It is a longitudinal cross-sectional schematic diagram of a handle of a balloon catheter in one embodiment of the present invention;

[0053] Figure 6 A schematic diagram of a cross-section of a balloon of a balloon catheter in one embodiment of the present invention;

[0054] Figure 7 A schematic diagram of a cross-section of a balloon of a balloon catheter in one embodiment of the present invention;

[0055] Reference numerals in the figures include:

[0056] 1. Tube body; 11. Inner tube; 12. Outer tube; 13. Tip; 111. Adjustment section; 1111. Inner layer; 1112. Middle layer; 1113. Outer layer; 2. Balloon; 21. Working section; 211. First tapered section; 212. Second tapered section; 22. Electrode assembly; 221. Connecting section; 222. Electrode body; 3. Handle; 31. Slide groove; 32. Slide button; 321. First connecting piece; 322. Second connecting piece; 33. Pulley; 4. Heart; 5. Blood vessels. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0059] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0060] Those skilled in the art can understand that, for any non-circular geometric shape, there must be an assumed circle that passes through at least two vertices of the geometric shape and makes the geometric shape completely inside or on the assumed circle with the smallest possible area. The assumed circle with the largest area is called the maximum assumed circle. There must be a gap between the maximum assumed circle and any edge of the geometric shape or the vertex of the geometric shape that is not on the maximum assumed circle.

[0061] For any patient's blood vessel, there must be an assumed inscribed circle of the cross-sectional shape of the blood vessel. When the balloon is inflated to such an extent that the area of ​​the maximum assumed circle is closest to the area of ​​the assumed inscribed circle, the area of ​​the maximum assumed circle is less than or equal to the area of ​​the assumed inscribed circle. Therefore, there must be a gap between any edge of the geometric shape or a vertex of the geometric shape that is not on the maximum assumed circle and the assumed inscribed circle, and the area of ​​the assumed inscribed circle is less than or equal to the cross-sectional area of ​​the blood vessel, that is, there must be a gap between any edge of the geometric shape or a vertex of the geometric shape that is not on the maximum assumed circle and the blood vessel.

[0062] Therefore, as long as the cross-sectional shape of the balloon after expansion is not circular, there can be a gap between the expanded balloon and the patient's blood vessels for blood to flow through. Example

[0063] like Figure 2 As shown, this embodiment provides a balloon catheter for treating mitral valve calcification, comprising: a tube body 1, a balloon 2 sleeved outside the tube body 1, and a handle 3 sleeved outside the proximal end of the tube body 1; wherein,

[0064] like Figure 3 As shown, the balloon 2 includes: a working section 21, a first tapered section 211 disposed at the proximal end of the working section 21, and a second tapered section 212 disposed at the distal end of the working section 21;

[0065] The longitudinal section of the working section 21 is rectangular, and the proximal end and the distal end of the working section 21 are provided with developing points for indicating the length of the working section 21; the balloon 2 is provided at a position close to the distal end of the tube body 1;

[0066] The cross-sectional shape of the balloon 2 after expansion is not circular, and at least two electrode assemblies 22 are fixedly arranged inside the balloon 2; Figure 6 As shown, the cross-sectional shape of the balloon 2 after expansion is an ellipse, and two electrode assemblies 22 are fixedly arranged inside the balloon 2, and the two electrode assemblies 22 are respectively arranged near the end points of the long axis of the ellipse;

[0067] The electrode assembly 22 includes: a connecting section 221, an electrode body 222, and a protective sleeve; wherein,

[0068] The proximal end of the connecting section 221 is fixedly arranged at the inner proximal end of the balloon 2, and the connecting section 221 gradually moves away from the tube body 1 from the proximal end of the connecting section 221 to the distal end of the connecting section 221; the electrode body 222 is fixedly arranged at the distal end of the connecting section 221; the protective sleeve is fixedly sleeved on the outer side of the electrode body 222, and the protective sleeve is used to wrap the positive electrode wire of the electrode body 222 and the negative electrode wire of the electrode body 222;

[0069] The tube body 1 comprises: an inner tube 11, an outer tube 12, and a tip 13; wherein,

[0070] The inner tube 11 is fixedly sleeved inside the outer tube 12, the proximal end of the inner tube 11 extends to the outside of the proximal end of the outer tube 12, the handle 3 is fixedly sleeved outside the proximal end of the inner tube 11, the distal end of the inner tube 11 extends to the outside of the distal end of the outer tube 12, the balloon 2 is fixedly sleeved outside the distal end of the inner tube 11; the tip 13 is fixedly arranged at the distal end of the inner tube 11;

[0071] The distal end of the outer tube 12 is provided with an adjustment section 111; the adjustment section 111 can make the balloon 2 bend between -90° and 90° relative to the outer tube 12; Figure 4 As shown, the adjustment section 111 includes: an inner layer 1111 provided with a plurality of chambers, a middle layer 1112 sleeved outside the inner layer 1111, and an outer layer 1113 sleeved outside the middle layer 1112;

[0072] Among them, a third connecting member is fixedly arranged in at least two of the plurality of chambers; the first connecting member 321 and the second connecting member 322 are fixedly connected to the third connecting member through two symmetrical chambers of the inner layer 1111;

[0073] like Figure 5 As shown, a slide groove 31 is provided on the handle 3, a slide button 32 is slidably arranged in the slide groove 31, and a pulley 33 is rotatably arranged at the proximal end of the slide groove 31; a first connecting member 321 and a second connecting member 322 are fixedly arranged on the slide button 32; one end of the first connecting member 321 is fixedly connected to the slide button 32, and the other end of the first connecting member 321 is fixedly connected to the distal end of the adjusting section 111 after passing through the pulley 33; one end of the second connecting member 322 is fixedly connected to the slide button 32, and the other end of the second connecting member 322 is fixedly connected to the distal end of the adjusting section 111; the first connecting member 321 and the second connecting member 322 are symmetrically arranged relative to the axis center of the tube body 1. Example

[0074] like Figure 2 As shown, this embodiment provides a balloon catheter for treating mitral valve calcification, comprising: a tube body 1, a balloon 2 sleeved outside the tube body 1, and a handle 3 sleeved outside the proximal end of the tube body 1; wherein,

[0075] like Figure 3 As shown, the balloon 2 includes: a working section 21, a first tapered section 211 disposed at the proximal end of the working section 21, and a second tapered section 212 disposed at the distal end of the working section 21;

[0076] The longitudinal section of the working section 21 is rectangular, and the proximal end and the distal end of the working section 21 are provided with developing points for indicating the length of the working section 21; the balloon 2 is provided at a position close to the distal end of the tube body 1;

[0077] The cross-sectional shape of the balloon 2 after expansion is not circular, and at least two electrode assemblies 22 are fixedly arranged inside the balloon 2; Figure 7As shown, the cross-sectional shape of the balloon 2 after expansion is a triangle, and three electrode assemblies 22 are fixedly arranged inside the balloon 2, and the three electrode assemblies 22 are respectively arranged near the end points of the triangle;

[0078] The electrode assembly 22 includes: a connecting section 221, an electrode body 222, and a protective sleeve; wherein,

[0079] The proximal end of the connecting section 221 is fixedly arranged at the inner proximal end of the balloon 2, and the connecting section 221 gradually moves away from the tube body 1 from the proximal end of the connecting section 221 to the distal end of the connecting section 221; the electrode body 222 is fixedly arranged at the distal end of the connecting section 221; the protective sleeve is fixedly sleeved on the outer side of the electrode body 222, and the protective sleeve is used to wrap the positive electrode wire of the electrode body 222 and the negative electrode wire of the electrode body 222;

[0080] The tube body 1 comprises: an inner tube 11, an outer tube 12, and a tip 13; wherein,

[0081] The inner tube 11 is fixedly sleeved inside the outer tube 12, the proximal end of the inner tube 11 extends to the outside of the proximal end of the outer tube 12, the handle 3 is fixedly sleeved outside the proximal end of the inner tube 11, the distal end of the inner tube 11 extends to the outside of the distal end of the outer tube 12, the balloon 2 is fixedly sleeved outside the distal end of the inner tube 11; the tip 13 is fixedly arranged at the distal end of the inner tube 11;

[0082] The distal end of the outer tube 12 is provided with an adjustment section 111; the adjustment section 111 can make the balloon 2 bend between -90° and 90° relative to the outer tube 12; Figure 4 As shown, the adjustment section 111 includes: an inner layer 1111 provided with a plurality of chambers, a middle layer 1112 sleeved outside the inner layer 1111, and an outer layer 1113 sleeved outside the middle layer 1112;

[0083] Among them, a third connecting member is fixedly arranged in at least two of the plurality of chambers; the first connecting member 321 and the second connecting member 322 are fixedly connected to the third connecting member through two symmetrical chambers of the inner layer 1111;

[0084] like Figure 5As shown, a slide groove 31 is provided on the handle 3, a slide button 32 is slidably arranged in the slide groove 31, and a pulley 33 is rotatably arranged at the proximal end of the slide groove 31; a first connecting member 321 and a second connecting member 322 are fixedly arranged on the slide button 32; one end of the first connecting member 321 is fixedly connected to the slide button 32, and the other end of the first connecting member 321 is fixedly connected to the distal end of the adjusting section 111 after passing through the pulley 33; one end of the second connecting member 322 is fixedly connected to the slide button 32, and the other end of the second connecting member 322 is fixedly connected to the distal end of the adjusting section 111; the first connecting member 321 and the second connecting member 322 are symmetrically arranged relative to the axis center of the tube body 1. Example

[0085] like Figure 2 As shown, this embodiment provides a balloon catheter for treating mitral valve calcification, comprising: a tube body 1, a balloon 2 sleeved outside the tube body 1, and a handle 3 sleeved outside the proximal end of the tube body 1; wherein,

[0086] like Figure 3 As shown, the balloon 2 includes: a working section 21, a first tapered section 211 disposed at the proximal end of the working section 21, and a second tapered section 212 disposed at the distal end of the working section 21;

[0087] The longitudinal section of the working section 21 is rectangular, and the proximal end and the distal end of the working section 21 are provided with developing points for indicating the length of the working section 21; the balloon 2 is provided at a position close to the distal end of the tube body 1;

[0088] The cross-sectional shape of the balloon 2 after expansion is not circular, and at least two electrode assemblies 22 are fixedly arranged inside the balloon 2; the cross-sectional shape of the balloon 2 after expansion is a quadrilateral, and four electrode assemblies 22 are fixedly arranged inside the balloon 2, and the four electrode assemblies 22 are respectively arranged near the end points of the quadrilateral;

[0089] The electrode assembly 22 includes: a connecting section 221, an electrode body 222, and a protective sleeve; wherein,

[0090] The proximal end of the connecting section 221 is fixedly arranged at the inner proximal end of the balloon 2, and the connecting section 221 gradually moves away from the tube body 1 from the proximal end of the connecting section 221 to the distal end of the connecting section 221; the electrode body 222 is fixedly arranged at the distal end of the connecting section 221; the protective sleeve is fixedly sleeved on the outer side of the electrode body 222, and the protective sleeve is used to wrap the positive electrode wire of the electrode body 222 and the negative electrode wire of the electrode body 222;

[0091] The tube body 1 comprises: an inner tube 11, an outer tube 12, and a tip 13; wherein,

[0092] The inner tube 11 is fixedly sleeved inside the outer tube 12, the proximal end of the inner tube 11 extends to the outside of the proximal end of the outer tube 12, the handle 3 is fixedly sleeved outside the proximal end of the inner tube 11, the distal end of the inner tube 11 extends to the outside of the distal end of the outer tube 12, the balloon 2 is fixedly sleeved outside the distal end of the inner tube 11; the tip 13 is fixedly arranged at the distal end of the inner tube 11;

[0093] The distal end of the outer tube 12 is provided with an adjustment section 111; the adjustment section 111 can make the balloon 2 bend between -90° and 90° relative to the outer tube 12; Figure 4 As shown, the adjustment section 111 includes: an inner layer 1111 provided with a plurality of chambers, a middle layer 1112 sleeved outside the inner layer 1111, and an outer layer 1113 sleeved outside the middle layer 1112;

[0094] Among them, a third connecting member is fixedly arranged in at least two of the plurality of chambers; the first connecting member 321 and the second connecting member 322 are fixedly connected to the third connecting member through two symmetrical chambers of the inner layer 1111;

[0095] like Figure 5 As shown, a slide groove 31 is provided on the handle 3, a slide button 32 is slidably arranged in the slide groove 31, and a pulley 33 is rotatably arranged at the proximal end of the slide groove 31; a first connecting member 321 and a second connecting member 322 are fixedly arranged on the slide button 32; one end of the first connecting member 321 is fixedly connected to the slide button 32, and the other end of the first connecting member 321 is fixedly connected to the distal end of the adjusting section 111 after passing through the pulley 33; one end of the second connecting member 322 is fixedly connected to the slide button 32, and the other end of the second connecting member 322 is fixedly connected to the distal end of the adjusting section 111; the first connecting member 321 and the second connecting member 322 are symmetrically arranged relative to the axis center of the tube body 1.

[0096] like Figure 1As shown, when in use, the surgeon flattens the balloon 2, and when the balloon 2 is folded, the connecting section 221 and the electrode body 222 are compressed on the surface of the inner tube 11; the balloon catheter is sent into the patient's body, the sliding button 32 is slid, and the sliding button 32 is slid toward the proximal end. The first connecting member 321 is tightened under the action of the pulley 33, and the second connecting member 322 is loosened. The first connecting member 321 and the second connecting member 322 pull the third connecting member to pull the adjusting section 111 to bend. When the sliding button 32 slides to the proximal end, the angle between the adjusting section 111 and the balloon is -90°; the sliding button 32 is slid toward the distal end, the second connecting member 322 is tightened, and the first connecting member 321 and the second connecting member 322 pull the third connecting member to pull the adjusting section 111 to bend. The connecting piece 321 is loosened under the action of the pulley 33, and the first connecting piece 321 and the second connecting piece 322 pull the third connecting piece to pull the adjusting section 111 to bend. When the sliding button 32 slides to the farthest end, the angle between the adjusting section 111 and the balloon is 90°; after reaching the treatment site, the balloon 2 is expanded, and the connecting section 221 restores its shape, so that the positive and negative electrodes of the electrode body 222 are close to the surface of the balloon 2. When the balloon 2 is expanded, the large diameter of the balloon 2 hits the mitral valve ring, and blood flows out from the small diameter; the electrode body 222 is turned on, and the electrode body 222 sends a shock wave to the mitral valve to remove the calcium deposits on the mitral valve.

[0097] In summary, the balloon catheter of the present invention is provided with a first connecting piece, a second connecting piece and a sliding button, so that the balloon of the balloon catheter is bent between -90° and 90° relative to the tube body, which is convenient for reaching the treatment site and improves the refinement of the operation; the present invention is also provided with a developing point, which can be developed under X-ray and mark the working section length of the balloon catheter; the balloon of the present invention is also provided with a plurality of electrode assemblies to prevent blood from blocking the mitral valve outflow tract.

[0098] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A balloon catheter for treating mitral valve calcification, characterized in that: include: A tube body (1), and a balloon (2) sleeved outside the tube body (1); wherein: The balloon (2) is arranged at a position close to the distal end of the tube (1); the cross-sectional shape of the balloon (2) after expansion is not circular; and at least two electrode assemblies (22) are fixedly arranged inside the balloon (2); The tube body (1) comprises: an adjustment section (111) arranged at the proximal end of the balloon (2); wherein: The adjustment section (111) can enable the balloon (2) to bend at an angle between -90° and 90° relative to the tube body (1); A handle (3) is sleeved on the proximal end of the tube (1); wherein: The handle (3) is provided with a slide groove (31), a slide button (32) is slidably arranged in the slide groove (31), and a pulley (33) is rotatably arranged at the proximal end of the slide groove (31); The sliding button (32) is fixedly provided with a first connecting member (321) and a second connecting member (322); One end of the first connecting member (321) is fixedly connected to the sliding button (32), and the other end of the first connecting member (321) is fixedly connected to the distal end of the adjusting section (111) after passing around the pulley (33); One end of the second connecting member (322) is fixedly connected to the sliding button (32), and the other end of the second connecting member (322) is fixedly connected to the distal end of the adjusting section (111); The first connecting member (321) and the second connecting member (322) are arranged symmetrically relative to the axis center of the tube body (1); The adjustment section (111) comprises: an inner layer (1111) provided with a plurality of chambers, a middle layer (1112) sleeved outside the inner layer (1111), and an outer layer (1113) sleeved outside the middle layer (1112); wherein: A third connecting member is fixedly disposed in at least two of the plurality of chambers; The first connecting member (321) and the second connecting member (322) are fixedly connected to the third connecting member via two symmetrical chambers of the inner layer (1111).

2. The balloon catheter according to claim 1, characterized in that: The cross-sectional shape of the balloon (2) after expansion is an ellipse, and two electrode assemblies (22) are fixedly arranged inside the balloon (2), and the two electrode assemblies (22) are respectively arranged near the end points of the long axis of the ellipse.

3. The balloon catheter according to claim 1, characterized in that: The cross-sectional shape of the balloon (2) after expansion is a triangle, and three electrode assemblies (22) are fixedly arranged inside the balloon (2), and the three electrode assemblies (22) are respectively arranged near the end points of the triangle.

4. The balloon catheter according to claim 1, characterized in that: The cross-sectional shape of the balloon (2) after expansion is a quadrilateral, and four electrode assemblies (22) are fixedly arranged inside the balloon (2), and the four electrode assemblies (22) are respectively arranged near the end points of the quadrilateral.

5. The balloon catheter according to claim 2, characterized in that: The electrode assembly (22) comprises: a connecting section (221), an electrode body (222), and a protective sleeve; wherein: The proximal end of the connecting section (221) is fixedly arranged at the inner proximal end of the balloon (2), and the connecting section (221) gradually moves away from the tube body (1) from the proximal end of the connecting section (221) to the distal end of the connecting section (221); The electrode body (222) is fixedly arranged at the distal end of the connecting section (221); The protective sleeve is fixedly sleeved on the outside of the electrode body (222), and the protective sleeve is used to wrap the positive electrode wire of the electrode body (222) and the negative electrode wire of the electrode body (222).

6. The balloon catheter according to claim 1, characterized in that: The tube body (1) comprises: an inner tube (11), an outer tube (12), and a tip (13); wherein: The inner tube (11) is fixedly sleeved inside the outer tube (12), the proximal end of the inner tube (11) extends to the outside of the proximal end of the outer tube (12), a handle (3) is fixedly sleeved outside the proximal end of the inner tube (11), the distal end of the inner tube (11) extends to the outside of the distal end of the outer tube (12), and the balloon (2) is fixedly sleeved outside the distal end of the inner tube (11); An adjustment section (111) is provided at the distal end of the outer tube (12), and the adjustment section (111) is capable of causing the balloon (2) to bend at an angle between -90° and 90° relative to the outer tube (12); The tip (13) is fixedly arranged at the distal end of the inner tube (11).

7. The balloon catheter according to claim 1, characterized in that: The balloon (2) comprises: a working section (21), a first tapered section (211) arranged at the proximal end of the working section (21), and a second tapered section (212) arranged at the distal end of the working section (21); wherein: The longitudinal cross-section of the working section (21) is rectangular, and the proximal end of the working section (21) and the distal end of the working section (21) are provided with developing points for indicating the length of the working section (21).

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