Multi-cavity balloon vasodilatation catheter

Abstract

The invention discloses a multi-cavity balloon blood vessel dilation catheter which comprises a catheter body. The multi-cavity balloon is arranged on the catheter in a sleeving manner; wherein the multi-cavity balloon comprises a balloon body, the balloon body comprises at least two cavities, the appearance of the multi-cavity balloon body is in a concave-convex shape, and all cavity channels of the balloon body are communicated with cavity channels filled with a pressure relief medium; each cavity of the balloon is filled, and the pressure of the pressure relief medium is balanced; on the circumference of the section of the blood vessel dilation section, the value of radial dilation supporting force borne by the balloon on the blood vessel wall is inconsistent, the radial dilation supporting force F borne by the balloon attached to the blood vessel is maximum, and the non-attached area of the balloon and the blood vessel is not subjected to the radial dilation supporting force. The blood vessel inner wall which is not subjected to radial expansion supporting force and the blood vessel inner wall which is subjected to the maximum radial expansion supporting force are easy to tear or crack, so that the purpose of blood vessel expansion is achieved, and the blood vessel expansion effect is effectively improved; and the balloon sunken part is used for blood to pass through when the multi-cavity balloon dilates a blood vessel.

Description

Technical Field

[0001] The invention relates to the technical field of balloon catheters, and in particular to a multi-lumen balloon vascular dilation catheter. Background Art

[0002] Atherosclerosis is a disease of narrowing and hardening of the arteries caused by the accumulation of plaque, which is composed of fibrous tissue, fat and calcium. The accumulated calcified plaque blocks the normal flow of blood and reduces the supply of oxygen and nutrients to the body. This causes related diseases of the arteries that supply blood to key parts of the body, including the brain, heart and limbs. One method used to treat atherosclerosis and other forms of arterial stenosis is percutaneous transluminal angioplasty, commonly referred to as "angioplasty" or "PTA", or "PTCA" when performed in the coronary arteries. Angioplasty uses mechanical methods to reshape the diseased blood vessels. It is a minimally invasive procedure that restores blood supply by restoring narrowed or dissected blood vessels to normal diameter through stents and balloon dilation.

[0003] Balloon catheter is an indispensable medical device for vascular interventional treatment. High-pressure balloons are mostly used for post-dilatation after stent implantation, natural or artificial dialysis arteriovenous fistula obstruction lesions, and have a certain effect on intravascular stenosis. They are also used for general calcified lesion vascular dilatation. Most of the balloons used clinically are non-compliant balloons or semi-compliant balloons. Most of the existing balloons are over the wire balloons. This type of balloon is basically composed of a catheter tip, a balloon and a push rod. Its advantages include easy exchange of steel wires, good push force, etc., but it also increases the overall outer diameter and the diameter of the joystick, and two operators are usually required during use. There is also a cutting balloon (cutting balloon), which works by first cutting the plaque and then squeezing and pushing it, causing a local tear with regular shape and controllable depth, reducing intimal damage and annular stress, thereby reducing the probability of restenosis of the blood vessel, but the scope of application of the cutting balloon is relatively small, and it is not suitable to use the cutting balloon to penetrate the stent mesh because the cutting balloon will be entangled with the stent after decompression. The expansion of blood vessels by traditional expansion support balloons is done by fitting the balloon to the blood vessel wall. The expansion support force of the balloon on the blood vessel wall is consistent on the cross-sectional circumference of the blood vessel expansion segment. It is difficult to break through the blood vessel wall when it is torn or ruptured, so the balloon needs to have a greater expansion support force to tear the blood vessel wall to achieve the purpose of blood vessel expansion. The greater the expansion support force of the balloon, the higher the requirements for the balloon's materials and production process, which also leads to higher production costs.

[0004] Vascular calcification is manifested as abnormal deposition of excessive calcium and phosphorus in the vascular wall, reduced arterial elasticity, stenosis of the lumen, etc., which can easily induce acute cardiovascular events. At present, shock wave balloons are usually used to treat some moderate or severe calcified lesions. During treatment, the shock wave balloon is delivered to the lesion, and after the shock wave balloon is filled with expansion medium and attached to the inner wall of the blood vessel, the ultrasonic generating device is turned on to generate shock waves to shatter moderate or severe calcified lesions. However, existing shock wave balloon dilatation catheters usually have the following problems:

[0005] 1. It is not easy to locate in the blood vessel;

[0006] 2. It is impossible to intercept and block the shattered calcified lesion particles;

[0007] 3. The shock wave energy conduction and gain effect are not enough;

[0008] 4. Poor crushing effect on hard lesions;

[0009] 5. Shock wave balloons are active products with high R&D investment and production costs.

[0010] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0011] The purpose of the present invention is to provide a multi-lumen balloon vascular dilation catheter to solve the problems of high inflation and discharge pressure requirements and poor vascular dilation effect of the existing single-lumen balloon catheter.

[0012] In order to achieve the above object, the present invention provides a multi-lumen balloon vascular dilation catheter, comprising:

[0013] A catheter; a multi-cavity balloon, wherein the multi-cavity balloon is sleeved on the catheter;

[0014] Wherein, the multi-cavity balloon comprises a balloon, the balloon comprises at least two chambers, the chambers are arranged along the axis direction of the catheter, one opposite end of the balloon is provided with a balloon cavity through-channel, and the end of the chamber is connected to the balloon cavity through-channel;

[0015] The cross section of the multi-chamber balloon in the expanded state is concave-convex. After a single chamber is expanded, it contacts the inner wall of the blood vessel. The contact between the inner wall of the blood vessel and the outer wall of the chamber bears the expansion support force. A recessed portion is formed between the outer walls of two adjacent chambers. The recessed portion is not in contact with the inner wall of the blood vessel. The inner wall of the blood vessel in the recessed portion area does not bear the support force. The recessed portion is used to pass blood when the multi-chamber balloon expands the blood vessel.

[0016] As a further description of the above technical solution:

[0017] The multi-cavity balloon also includes a delivery section and a balloon distal end. The delivery section is mounted on the catheter. One end of the delivery section is connected to the first joint. The balloon distal end is arranged at the end of the balloon away from the first joint. The catheter includes a balloon cavity section extending into the balloon. A balloon proximal tube is arranged at the end of the balloon facing the first joint. A gap is arranged between the outer cavity of the catheter and the proximal tube of the balloon.

[0018] As a further description of the above technical solution:

[0019] Before using the multi-lumen balloon to dilate a blood vessel, rotate the first joint, which drives the multi-lumen balloon to rotate to the required radial angle expansion position to implement expansion, thereby achieving local directional expansion of the blood vessel in the radial angle direction.

[0020] As a further description of the above technical solution:

[0021] A chamber through-channel is arranged between the multiple chambers of the balloon, the gap is connected to the chamber through-channel, and an annular fusion welding part is arranged on the distal end of the balloon.

[0022] As a further description of the above technical solution:

[0023] An opposite side of the balloon is provided with a first axial fusion weld and a second axial fusion weld.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In the present invention, a multi-chamber balloon is used in a multi-chamber balloon vascular dilation catheter. Each chamber of the balloon is connected to the cavity of the filling and pressure relief medium. The pressure between the chambers of the balloon is balanced, which can achieve rapid filling and pressure relief, and effectively reduce the filling and pressure relief requirements.

[0026] 2. In the present invention, after the multiple chambers of the balloon of the multi-chamber balloon vascular dilation catheter are expanded on the cross-sectional circumference of the vascular dilation section, the overall cross-sectional shape is different from the circular cross-sectional shape of the traditional single-chamber, so that the force value of the balloon support force on the vascular wall is inconsistent, so that the inner wall of the blood vessel is more easily torn or cracked, thereby achieving the purpose of vascular dilation and effectively improving the vascular dilation effect.

[0027] 3. In the present invention, the concave area formed after the balloon is expanded not only makes the inner wall of the blood vessel bear no supporting force, but also allows blood to pass through when the multi-chamber balloon expands the blood vessel.

[0028] 4. In the present invention, during the balloon dilation process, before using the multi-cavity balloon to dilate the blood vessel, the first joint is rotated, and the first joint drives the multi-cavity balloon to rotate, and the balloon is rotated to the position where radial angle expansion is required to implement expansion, thereby achieving local directional expansion in the radial angle direction of the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 The present invention is a schematic diagram of the structure of a multi-lumen balloon vasodilation catheter design.

[0031] Figure 2 for Figure 1 A local enlarged view of point A1 in the middle.

[0032] Figure 3 A partial cross-sectional view from the main perspective of a design of a multi-lumen balloon vascular dilation catheter.

[0033] Figure 4 for Figure 3 A partial enlarged view of point A2 in the middle.

[0034] Figure 5 for Figure 3 A partial enlarged view of A3 in the middle.

[0035] Figure 6 for Figure 3 A4-A4 section view.

[0036] Figure 7 The present invention is a schematic diagram of a multi-lumen balloon vascular dilatation catheter design and its implementation in a blood vessel.

[0037] Figure 8 A partial cross-sectional view from a side angle of a design of a multi-lumen balloon vascular dilation catheter.

[0038] Fig. 9 for Figure 8 A partial enlarged view of A5 in the middle.

[0039] Fig.10 This is a schematic diagram of the structure of a multi-lumen balloon vasodilation catheter design II.

[0040] Fig.11 for Fig.10 A partial enlarged view of A6 in the middle.

[0041] Fig.12 This is a schematic diagram of the main view structure of a multi-lumen balloon vasodilation catheter design II.

[0042] Fig.13 for Fig.12 A7-A7 section view.

[0043] Fig.14 This is a partial schematic diagram from a side view of a second design of a multi-lumen balloon vasodilation catheter.

[0044] Fig.15 for Fig.14 A partial enlarged view of A8 in the middle.

[0045] Fig.16 for Fig.14 A partial enlarged view of A9 in the middle.

[0046] Fig.17 This is a partial schematic diagram of the main view of a second design of a multi-lumen balloon vascular dilation catheter.

[0047] Fig.18 for Fig.17 A partial enlarged view of A10 in the middle.

[0048] Fig.19 for Fig.17 A partial enlarged view of A11 in the middle.

[0049] Fig. 20 This is a schematic diagram of the structure of a multi-lumen balloon vasodilator catheter design three.

[0050] Fig.21 for Fig. 20 A partial enlarged view of A12 in the middle.

[0051] Fig. 22 This is a schematic diagram of the main view structure of a multi-lumen balloon vasodilation catheter design three.

[0052] Fig.23 for Fig. 22 A13-A13 section view.

[0053] Fig.24 This is a partial schematic diagram from a side view of a design three of a multi-lumen balloon vascular dilation catheter.

[0054] Fig.25 for Fig.24 A partial enlarged view of A14 in the middle.

[0055] Fig.26 for Fig.24 A partial enlarged view of A15 in the middle.

[0056] Fig. 27 This is a partial schematic diagram of the main view of a multi-lumen balloon vasodilation catheter design three.

[0057] Fig.28 for Fig. 27 A partial enlarged view of A16 in the middle.

[0058] Fig.29 for Fig. 27A partial enlarged view of A17 in the middle.

[0059] Fig.30 Schematic diagram of the balloon structure of four multi-lumen balloons designed for a multi-lumen balloon vasodilator catheter.

[0060] Fig.31 Schematic diagram of the balloon structure of five multi-lumen balloons designed for a multi-lumen balloon vasodilator catheter.

[0061] Fig.32 Schematic diagram of the balloon structure of six multi-lumen balloons designed for a multi-lumen balloon vasodilator catheter.

[0062] Legend:

[0063] 101, first joint; 102, delivery section; 103, balloon; 104, distal end of balloon; 131, fifth axial fusion weld; 161, first balloon cavity through-channel; 171, second balloon cavity through-channel; 172, plug; 401, gap; 402, catheter; 403, balloon proximal tube; 404, balloon cavity section; 501, annular fusion weld; 601, first axial fusion weld; 602, second axial fusion weld; 603, first region; 604, second region; 605, first balloon Outside; 606, outside of the second balloon; 801, chamber through channel; 901, blood vessel; 902, first support expansion; 903, second support expansion; 904, first tear or brittle fracture; 905, second tear or brittle fracture; 231, third axial fusion weld; 232, fourth axial fusion weld; 233, first support balloon; 234, second support balloon; 235, middle balloon; 321, first folding surface; 322, second folding surface; 323, third folding surface; 324, fourth folding surface. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0065] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0066] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0067] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0068] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication of multiple components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] Example 1

[0070] See also Figure 1-9 The present invention provides a multi-lumen balloon vascular dilation catheter, comprising:

[0071] Catheter 402;

[0072] A multi-chamber balloon, which is mounted on the catheter 402;

[0073] The multi-chamber balloon includes a balloon 103, which includes at least a plurality of chambers arranged along the axis of the catheter 402, and a through-channel is provided at one opposite end of the balloon 103, and the end of the chamber is connected to the through-channel;

[0074] See attached Figure 7 The cross section of the multi-chamber balloon in the expanded state is concave-convex. After a single chamber is expanded, it contacts the inner wall of the blood vessel. The contact between the inner wall of the blood vessel and the outer wall of the chamber bears the expansion support force. A recessed portion is formed between the outer walls of two adjacent chambers. The recessed portion is non-contacting with the inner wall of the blood vessel. The inner wall of the blood vessel in the recessed portion area does not bear the support force. The recessed portion is used to pass blood when the multi-chamber balloon expands the blood vessel.

[0075] The method for manufacturing the multi-lumen balloon vascular dilation catheter comprises the following steps:

[0076] S1, putting the multi-chamber balloon on the catheter 402;

[0077] S2, axially fusing and welding the inner wall of the balloon 103 along the axial direction of the catheter 402 to form a plurality of chambers of the balloon 103;

[0078] S3. The multi-lumen balloon angiodilation catheter is completed.

[0079] The multi-cavity balloon also includes a delivery section 102 and a balloon distal end 104. The delivery section 102 is mounted on the catheter 402. One end of the delivery section 102 is connected to the first joint 101. The balloon distal end 104 is arranged at the end of the balloon 103 away from the first joint 101. The catheter 402 includes a balloon cavity section 404 extending into the balloon 103. A balloon proximal tube 403 is arranged at the end of the balloon 103 facing the first joint 101. A gap 401 is arranged between the outer cavity of the catheter 402 and the balloon proximal tube 403.

[0080] Before using the multi-lumen balloon to dilate a blood vessel, the first joint 101 is rotated, and the first joint 101 drives the multi-lumen balloon to rotate, and the balloon is rotated to the position where radial angular expansion is required to be performed to achieve local directional expansion of the blood vessel in the radial angular direction.

[0081] When the medium is introduced into the multi-chamber balloon, it is fed in through the first connector 101, passes through the interlayer space between the delivery section 102 and the catheter 402, and enters the balloon 103 from the gap 401 at the proximal tube 403 of the balloon, so that the balloon 103 is filled with or unloaded with the medium.

[0082] A chamber through-channel 801 is provided between the multiple chambers of the balloon 103, the gap 401 is connected to the chamber through-channel 801, and an annular fusion welding portion 501 is provided on the distal end 104 of the balloon to achieve communication between the chambers of the balloon 103 and the filling and pressure relief medium channels of the balloon 103.

[0083] The balloon 103 is fixedly sealed with the catheter 402 by the annular fusion welding portion 501 formed by fusion welding, and the seal is firm, resistant to high pressure, and prevents leakage of the medium.

[0084] The opposite side of the balloon 103 is provided with a first axial fusion weld 601 and a second axial fusion weld 602. Figure 6 The inner wall of the opposite side of the balloon 103 is axially fused and welded with the balloon cavity section 404 of the catheter 402 , thereby separating the balloon 103 into two chambers located on both sides of the catheter 402 .

[0085] See attached Figure 6-7 When the balloon 103 expands the blood vessel 901, the first axial fusion weld 601 and the second axial fusion weld 602 of the balloon 103 are concave, and theoretically have no contact with the blood vessel wall. Even if there is contact, there is no expansion force.

[0086] The support force for expanding the blood vessel on the cross section of the blood vessel is mainly in the first area 603 and the second area 604. The outer side 605 of the first balloon and the outer side 606 of the second balloon far from the catheter 402 on the cross section of the blood vessel directly support the inner wall of the blood vessel. The support force on the blood vessel wall on the cross section of the blood vessel is the greatest, which makes the inner wall of the blood vessel on the cross section of the blood vessel most likely to tear at the part not supported by the balloon, thereby achieving the purpose of expanding the blood vessel. If there is calcification on the inner wall of the blood vessel, the inner wall of the blood vessel on the cross section of the blood vessel is more likely to be brittle at the part not supported by the balloon.

[0087] See attached Figure 7 Schematic diagram of the cross-section of the balloon support expansion in the middle balloon expansion section, a first support expansion site 902, a second support expansion site 903, a first tear or brittle fracture site 904, and a second tear or brittle fracture site 905 are formed on the blood vessel 901, and the support expansion force of the blood vessel in the F direction in the figure is the largest.

[0088] See attached Figure 6 In the same principle, by changing the number of axial fusion welding points between the inner wall of the balloon 103 and the balloon cavity section 404 of the catheter 402, the number of chambers formed can be controlled to set a multi-cavity balloon such as a three-cavity balloon or a four-cavity balloon.

[0089] A developing ring may be provided at the catheter balloon lumen section 404 , so that the doctor can observe the developing ring through an instrument and thus determine the position of the balloon 103 .

[0090] Working principle: A multi-cavity balloon is used in a multi-cavity balloon vascular dilation catheter. Each chamber of the balloon 103 is connected to the cavity of the filling and pressure relief medium. The pressure between the chambers of the balloon 103 is balanced, which can achieve rapid filling and pressure relief, and effectively reduce the filling and pressure relief requirements. The medium can be gas or liquid. A drug coating is also provided on the surface of the multi-cavity balloon to further improve the treatment effect.

[0091] On the cross-sectional circumference of the vascular dilation section of the multi-lumen balloon vascular dilation catheter, after the multiple chambers of the balloon 103 are expanded, the overall cross-sectional shape is different from the circular cross-sectional shape of the traditional single-chamber, so that the force value of the balloon support force on the vascular wall is inconsistent, so that the inner wall of the blood vessel is more easily torn or cracked, thereby achieving the purpose of vascular dilation and effectively improving the vascular dilation effect.

[0092] Example 2

[0093] See also Figure 10-19On the basis of the above-mentioned embodiment 1, this embodiment further makes the following technical solutions as improvements: the proximal tube 403 of the balloon is annularly fused and welded on the balloon cavity section 404, a plug 172 is provided in the distal end 104 of the balloon, and a fifth axial fusion welding 131 is provided on the balloon 103. The fifth axial fusion welding 131 is used to form a plurality of separated chambers of the balloon 103, and the upper end of a separated chamber is connected to another separated chamber through the first balloon cavity through-channel 161, and the lower end of a separated chamber is connected to another separated chamber through the second balloon cavity through-channel 171. The multi-cavity balloon is directly sleeved on the bottom of the catheter 402, and the multi-cavity balloon is formed into a plurality of separated chambers by performing the fifth axial fusion welding 131 in the center. The upper and lower ends of the plurality of separated chambers are connected through the first balloon cavity through-channel 161 and the second balloon cavity through-channel 171, respectively.

[0094] When the balloon in Design 2 dilates the blood vessel, the force value of the balloon support force on the blood vessel wall is also inconsistent.

[0095] The proximal tube 403 of the balloon is directly annularly fused and welded on the balloon cavity section 404 of the catheter. The inner cavity of the catheter 402 integrates the functions of the guide wire, the balloon filling medium, and the balloon pressure relief medium. The inner cavity of the catheter becomes an inlet and outlet cavity, and the distal end of the catheter needs to be sealed with a plug to prevent leakage. A medium channel hole is made in the balloon cavity section 404 of the catheter 402 to ensure that the balloon cavity and the connector end can normally pass in and out the medium.

[0096] In addition, a developing ring may be provided on the catheter balloon lumen section 404. The function of the developing ring is to allow the doctor to see the developing ring through an instrument, thereby determining the position of the balloon 103.

[0097] Example 3

[0098] See also Figure 20-29 Based on the above-mentioned embodiment 1, this embodiment further makes the following improved technical solutions: a third axial fusion weld 231 and a fourth axial fusion weld 232 are respectively provided on both sides of the balloon cavity section 404, and the balloon 103 between the third axial fusion weld 231 and the fourth axial fusion weld 232 forms an intermediate balloon 235, and a first supporting balloon 233 and a second supporting balloon 234 are respectively provided on both sides of the intermediate balloon 235.

[0099] Different from the fusion welding of the inner wall of the balloon 103 and the balloon cavity section 404 in the first design, the inner wall of the balloon 103 in the third design is fusion welded with itself, and two welds are formed, namely, the third axial fusion welding 231 and the fourth axial fusion welding 232, so as to separate the balloon 103 into three cavities, namely, the intermediate balloon 235, the first supporting balloon 233, and the second supporting balloon 234. The intermediate balloon 235, the first supporting balloon 233, and the second supporting balloon 234 are connected through the cavity through-channel 801 at the upper and lower ends to ensure the same pressure.

[0100] The three-chamber multi-chamber balloon is the same as the two-chamber multi-chamber balloon. When dilating a blood vessel, the first support balloon 233 and the second support balloon 234 form a blood vessel support expansion site, and the middle balloon 235 forms a blood vessel tear or brittle crack site to ensure the blood vessel dilation effect.

[0101] Example 4

[0102] See also Fig.30 This embodiment further provides the following improved technical solution based on the above-mentioned embodiment 1: the multi-cavity balloon includes a plurality of single-cavity balloons arranged in parallel.

[0103] When the multi-lumen balloon vascular dilation catheter is dilating blood vessels, the multiple independent single-lumen balloons of the multi-lumen balloon are parallel, the head and tail ends of the balloon will merge together, and the cavities of each balloon are also connected. When the multi-lumen balloon vascular dilation catheter is dilating blood vessels, the multiple single-lumen balloons of the multi-lumen balloon are parallel and separated, independently expanding the blood vessels and effectively improving the effect of vascular dilation.

[0104] When the four balloon designs are used to dilate blood vessels, the force values ​​of the balloon support forces on the blood vessel wall are also inconsistent.

[0105] Example 5

[0106] See also Fig.31 Based on the above embodiment 1, this embodiment further provides the following improved technical solutions: multiple single-cavity balloons are fused and welded. Based on the multi-cavity balloon design 4, multiple single-cavity balloons are fused and welded on the surface to form a multi-cavity balloon with multiple chamber structures.

[0107] The difference between the multi-cavity balloon in Design 2 and Design 2 is that in Design 2, an independent single-cavity balloon is axially fused and welded in the center to form multiple chambers, while in the multi-cavity balloon Design 5, two or more independent balloons are fused and welded in parallel along the axial direction to form two or more parallel balloon cavities.

[0108] When the balloon in design five is used to dilate the blood vessel, the force value of the balloon support force on the blood vessel wall is also inconsistent.

[0109] Example 6

[0110] See also Fig.32 Based on the above-mentioned embodiment 1, this embodiment further makes the following improved technical solutions: the balloon 103 is bent to form a first folding surface 321, a second folding surface 322, a third folding surface 323, and a fourth folding surface 324, and the first folding surface 321, the second folding surface 322, the third folding surface 323, and the fourth folding surface 324 are axially fused and welded.

[0111] After being bent, the single-chamber balloon 103 is formed into a structure with two chambers by fusing and welding the four surfaces, namely the first folding surface 321 , the second folding surface 322 , the third folding surface 323 , and the fourth folding surface 324 , together, thereby improving the welding quality and the pressure resistance.

[0112] When the six balloon designs are used to dilate blood vessels, the force values ​​of the balloon support forces on the blood vessel wall are also inconsistent.

[0113] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-lumen balloon vasodilator catheter, characterized in that: include: A catheter; a multi-cavity balloon, wherein the multi-cavity balloon is sleeved on the catheter; Wherein, the multi-chamber balloon comprises a balloon, the balloon comprises at least two chambers, the chambers are arranged along the axial direction of the catheter, one opposite end of the balloon is provided with a capsule cavity through-channel, and the end of the chamber is connected to the capsule cavity through-channel; The cross section of the multi-chamber balloon in the expanded state is concave-convex. After a single chamber is expanded, it contacts the inner wall of the blood vessel. The contact between the inner wall of the blood vessel and the outer wall of the chamber bears the expansion support force. A recessed portion is formed between the outer walls of two adjacent chambers. The recessed portion is separated from the inner wall of the blood vessel. The inner wall of the blood vessel in the recessed portion area does not bear the support force. The recessed portion is used to pass blood when the multi-chamber balloon expands the blood vessel. Before the multi-chamber balloon is expanded, the balloon is rotated to a position where expansion in a radial angle direction is required to be performed, thereby achieving local directional expansion in the radial angle direction of the blood vessel.

2. A multi-lumen balloon vascular dilation catheter according to claim 1, characterized in that: The multi-cavity balloon also includes a delivery section and a balloon distal end, the delivery section is sleeved on the catheter, one end of the delivery section is connected to the first joint, the balloon distal end is arranged at the end of the balloon away from the first joint, the catheter includes a balloon cavity section extending into the balloon, the balloon is provided with a balloon proximal tube at one end facing the first joint, and a gap is provided between the catheter outer cavity and the balloon proximal tube.

3. A multi-lumen balloon angiodilator catheter according to claim 2, characterized in that: A chamber through-channel is arranged between the multiple chambers of the balloon, the gap is connected to the chamber through-channel, and an annular fusion welding part is arranged on the distal end of the balloon.

4. A multi-lumen balloon angiodilator catheter according to claim 3, characterized in that: An opposite side of the balloon is provided with a first axial fusion weld and a second axial fusion weld.

5. A multi-lumen balloon angiodilator catheter according to claim 2, characterized in that: A third axial fusion weld and a fourth axial fusion weld are respectively arranged on both sides of the balloon cavity segment, and the balloon between the third axial fusion weld and the fourth axial fusion weld forms an intermediate balloon, and a first supporting balloon and a second supporting balloon are respectively arranged on both sides of the intermediate balloon.

6. A multi-lumen balloon angiodilator catheter according to claim 2, characterized in that: The proximal tube of the balloon is annularly fused and welded on the balloon cavity section, a plug is provided in the distal end of the balloon, and a fifth axial fusion weld is provided on the balloon. The fifth axial fusion weld is used to form a plurality of separated chambers in the balloon, wherein the upper end of a separated chamber is connected to another separated chamber through a first balloon cavity through-channel, and the lower end of a separated chamber is connected to another separated chamber through a second balloon cavity through-channel.

7. A multi-lumen balloon angiodilator catheter according to claim 1, characterized in that: The multi-lumen balloon includes a plurality of single-lumen balloons arranged in parallel.

8. The multi-lumen balloon angiodilator catheter according to claim 1, characterized in that: The multiple single-chamber balloons are fused and welded.

9. The multi-lumen balloon angiodilator catheter according to claim 1, characterized in that: The balloon is bent upward to form a first folding surface, a second folding surface, a third folding surface, and a fourth folding surface, and the first folding surface, the second folding surface, the third folding surface, and the fourth folding surface are axially fused and welded.

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