Balloon catheter

Abstract

The utility model discloses a balloon catheter which comprises a catheter body and a plurality of functional balloons, the functional balloons are installed on the catheter body, a plurality of pressurizing cavities used for pressurizing the functional balloons are arranged in the catheter body, each pressurizing cavity correspondingly pressurizes one functional balloon, each pressurizing cavity is provided with a corresponding balloon liquid inlet portion, and the balloon liquid inlet portion is provided with a balloon liquid outlet portion. And the balloon liquid inlet part penetrates through the outer wall of the tube body so as to communicate the pressurizing cavity channel corresponding to the balloon liquid inlet part with the interior of the functional balloon. According to the multifunctional balloon catheter, liquid filled into the pressurizing cavity can enter the functional balloons to expand the functional balloons so that the corresponding function of repairing lesion blood vessels can be achieved, different repairing functions can be achieved through the different functional balloons, and therefore the functions of multiple balloon catheters are integrated on one balloon catheter, and the balloon catheter is convenient to use. The situation that different balloons need to enter and exit from the coronary artery of a patient repeatedly when the balloons are used alternately is avoided, the use amount of instruments in an operation is reduced, the operation duration is shortened, the operation efficiency is improved, and the operation risk and the medical burden are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a balloon catheter. Background Art

[0002] At present, the recommended treatment devices for in-stent restenosis after insufficient stent expansion caused by vascular calcification mainly include shock wave balloon catheters, cutting balloon catheters and drug balloon catheters. In clinical work, before and after the shock wave balloon catheter, cutting balloon catheter and drug balloon catheter are delivered to the lesion site for treatment, a high-pressure balloon catheter needs to be delivered to the lesion site for high-pressure expansion to increase the lumen diameter and achieve the ideal lumen diameter. Therefore, shock wave balloon catheters, cutting balloon catheters and drug balloon catheters need to be combined with another high-pressure balloon catheter in clinical practice to modify the arterial lumen. This alternating use requires repeated insertion of different balloons along the working guidewire into and out of the patient's coronary artery. For the operator, it seriously prolongs the duration of the entire PCI operation, while increasing the surgical risk and the operator's workload, wasting medical resources to a certain extent. For patients, an operation consumes too many balloon consumables, increasing the medical burden. Utility Model Content

[0003] The embodiment of the utility model provides a balloon catheter, aiming to solve the problem that the existing balloon catheter has a single function and multiple balloon catheters with different functions need to be used alternately during treatment, resulting in high surgical risks and waste of medical resources.

[0004] The utility model provides a balloon catheter, comprising: a tube body and a plurality of functional balloons, wherein the plurality of functional balloons are mounted on the tube body, wherein the tube body is provided with a plurality of charging cavities for charging the plurality of functional balloons, wherein each charging cavity corresponds to charging one functional balloon, and each charging cavity is provided with a corresponding balloon liquid inlet portion, wherein the balloon liquid inlet portion penetrates the outer wall of the tube body to connect the charging cavity corresponding to the balloon liquid inlet portion with the interior of the functional balloon.

[0005] In the balloon catheter provided by the utility model, the functional balloon includes a first balloon and a second balloon arranged at the distal end of the tube body, the first balloon and the second balloon are arranged at intervals along the axial direction of the tube body, and the tube body is provided with a first filling cavity for inflating the first balloon and a second filling cavity for inflating the second balloon.

[0006] In the balloon catheter provided by the utility model, a guide wire cavity is also provided in the tube body.

[0007] In the balloon catheter provided by the utility model, an annular rib, a first connecting rib and a second connecting rib are provided on the cross section of the tube body, the center of the annular rib is concentric with the center of the tube body, and the annular rib is connected to the tube body through the first connecting rib and the second connecting rib respectively; wherein the guide wire cavity is formed inside the annular rib; one side of the annular rib, the first connecting rib, the second connecting rib and the tube body are combined to form the first pressurized cavity; the other side of the annular rib, the first connecting rib, the second connecting rib and the tube body are combined to form the second pressurized cavity.

[0008] In the balloon catheter provided by the utility model, a first hollow area, a second hollow area and a third hollow area are distributed on the cross-section of the tube body, the interior of the first hollow area forms the first pressure filling cavity, the interior of the second hollow area forms the second pressure filling cavity, and the interior of the third hollow area forms the guidewire cavity.

[0009] In the balloon catheter provided by the utility model, a dividing rib is provided on the cross-section of the tube body, and the dividing rib is connected to the tube body along the radial direction of the tube body. One side of the dividing rib and the tube body are combined to form the first pressure-charging cavity, and the other side of the dividing rib and the tube body are combined to form the second pressure-charging cavity. An inner catheter is provided in the second pressure-charging cavity, and the inner catheter is the guide wire cavity.

[0010] In the balloon catheter provided by the utility model, the diameter of the second inflation lumen is greater than the diameter of the first inflation lumen.

[0011] In the balloon catheter provided by the utility model, a front end face is provided at the end of the tube body away from the operator; a first balloon liquid inlet portion connecting the first pressure filling cavity and the first balloon is provided at the distal end of the tube body, and the axial distance between the first balloon liquid inlet portion and the front end face is a first distance; a second balloon liquid inlet portion connecting the second pressure filling cavity and the second balloon is provided at the distal end of the tube body, and the axial distance between the second balloon liquid inlet portion and the front end face is a second distance; wherein, the second distance is greater than the first distance.

[0012] In the balloon catheter provided by the utility model, a first pressure-charging cavity liquid inlet and a second pressure-charging cavity liquid inlet are provided at the proximal end of the tube body, the first pressure-charging cavity liquid inlet and the second pressure-charging cavity liquid inlet penetrate the outer wall of the tube body and are respectively connected with the first pressure-charging cavity and the second pressure-charging cavity, the axial distances between the first pressure-charging cavity liquid inlet and the second pressure-charging cavity liquid inlet and the front end face are respectively the third distance and the fourth distance, and the third distance and the fourth distance are both greater than the second distance.

[0013] In the balloon catheter provided by the utility model, the balloon catheter also includes a catheter seat, and the catheter seat is provided with a first charging port, a second charging port and a guidewire channel. When the catheter seat is connected to the proximal end of the tube body, the first charging port and the second charging port are respectively connected to the first charging cavity liquid inlet and the second charging cavity liquid inlet, and the guidewire channel is connected to the guidewire cavity.

[0014] In the balloon catheter provided by the utility model, the balloon catheter also includes a tip portion, which is arranged at the distal end of the tube body, the tip portion blocks the first inflation lumen and the second inflation lumen, and the guidewire lumen passes through the tip portion along the axial direction of the tube body.

[0015] In the balloon catheter provided by the utility model, a developing ring is provided in the first balloon and / or the second balloon, and the developing ring is installed on the outer wall of the tube body.

[0016] In the balloon catheter provided by the utility model, the first balloon is a shock wave balloon, and the second balloon is a high-pressure non-compliant balloon.

[0017] In the balloon catheter provided by the utility model, an electrode assembly for generating shock waves is provided on the outer wall of the tube body and inside the first balloon.

[0018] In the balloon catheter provided by the utility model, the first balloon is a drug balloon, and the second balloon is a high-pressure non-compliant balloon.

[0019] In the balloon catheter provided by the utility model, a drug coating is provided on the outer wall of the first balloon.

[0020] In the balloon catheter provided by the utility model, the first balloon is a cutting balloon, and the second balloon is a high-pressure non-compliant balloon.

[0021] In the balloon catheter provided by the utility model, a cutting piece is provided on the outer wall of the first balloon.

[0022] The utility model provides a balloon catheter, which comprises a tube body and a plurality of functional balloons, wherein a corresponding pressurizing cavity and a balloon liquid inlet are arranged in the tube body for each functional balloon, and the balloon liquid inlet penetrates the outer wall of the tube body so as to connect the corresponding pressurizing cavity with the interior of the functional balloon, thereby, by filling the pressurizing cavity with liquid, the liquid can enter the interior of the functional balloon to expand it and thus realize the corresponding function of repairing diseased blood vessels, and different functional balloons can realize different repair functions, thus, the functions of multiple balloon catheters are integrated on only one balloon catheter, and the need to repeatedly insert and exit different balloons into and out of the patient's coronary artery for alternating use is avoided, the use of instruments during surgery is reduced, the operation time is shortened, the operation efficiency is improved, and the operation risk and medical burden are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a balloon catheter according to an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of a balloon catheter for a shock wave balloon and a high-pressure non-compliant balloon according to an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of a balloon catheter for a drug balloon and a high-pressure non-compliant balloon according to an embodiment of the utility model;

[0027] Figure 4 A schematic diagram of a balloon catheter for cutting a balloon and a high-pressure non-compliant balloon according to an embodiment of the utility model;

[0028] Figure 5 It is a schematic cross-sectional view of the tube body of the balloon catheter of the utility model embodiment;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the tube body of the balloon catheter of the embodiment of the utility model;

[0030] Figure 7 Another schematic diagram of the three-dimensional structure of the tube body of the balloon catheter according to the embodiment of the utility model;

[0031] Figure 8 A schematic diagram of a cross section of a tube body of a balloon catheter according to another embodiment of the utility model;

[0032] Fig. 9 It is a schematic diagram of the three-dimensional structure of the tube body of a balloon catheter according to another embodiment of the utility model;

[0033] Fig.10 A schematic diagram of a cross section of a tube body of a balloon catheter according to another embodiment of the utility model;

[0034] Fig.11 A schematic diagram of a cross section of a guidewire cavity of a balloon catheter according to another embodiment of the utility model;

[0035] Fig.12 It is a schematic diagram of a cross section of a tube body of a balloon catheter accommodating a guidewire cavity according to another embodiment of the utility model;

[0036] Fig.13It is another schematic diagram of the three-dimensional structure of the tube body of the balloon catheter of the embodiment of the utility model;

[0037] Fig.14 It is another schematic diagram of the three-dimensional structure of the tube body of the balloon catheter according to the embodiment of the utility model;

[0038] Reference numerals:

[0039] 1. Tube body; 11. First charging cavity; 111. First balloon liquid inlet; 112. First charging cavity liquid inlet; 12. Second charging cavity; 121. Second balloon liquid inlet; 122. Second charging cavity liquid inlet; 13. Guidewire cavity; 101. Annular rib; 102. First connecting rib; 103. Second connecting rib; 104. First hollow area; 105. Second hollow area; 106. Third hollow area; 107. Separating rib; 2. First balloon; 21. Electrode assembly; 22. Drug coating; 23. Cutting piece; 3. Second balloon; 4. Catheter seat; 41. First charging port; 42. Second charging port; 43. Guidewire channel; 5. Tip; 6. Development ring. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only for reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention. In addition, in the drawings, structures with similar or identical structures are represented by the same reference numerals.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In order to facilitate understanding of the balloon catheter of this embodiment, the relevant medical background of the balloon catheter is further introduced below.

[0044] Coronary heart disease is the leading cause of death and disability in many countries. Percutaneous coronary intervention (PCI) has become an effective means of treating coronary artery stenosis. The earliest and most mature one is percutaneous coronary stent implantation. After years of development, the rapid development of stent bioengineering technology has improved the safety and effectiveness of stent treatment. With the continuous development of PCI, interventional treatment involves more complex lesions. Coronary artery calcification lesions often run through various complex lesions, which increases the difficulty of coronary artery interventional treatment and is one of the main challenges faced by cardiovascular interventional physicians. In particular, severe calcified lesions, or severely calcified lesions with distortion, angulation, and diffuseness, significantly increase the incidence of immediate surgical complications and early and late major adverse cardiovascular events. In-stent restenosis (ISR) is the main group of restenosis after PCI and is an important burden of PCI treatment. ISR refers to the phenomenon that after the implantation of a stent at the site of the culprit vessel lesion, the pathological processes such as neointimal tissue hyperplasia and new atherosclerosis occur, leading to the phenomenon of restenosis of the vascular lumen. It usually occurs 6-12 months after PCI. And ISR may lead to the recurrence of major adverse cardiovascular events (MACE), including angina pectoris, acute myocardial infarction, and even sudden cardiac death, which greatly limits the clinical safety and effectiveness of PCI. The mechanism of ISR is multifactorial, including mechanical factors, biological factors, patient factors and operator factors. Among them, calcified lesions are closely related to the formation of higher intra-stent thrombosis and target lesion revascularization, which may lead to insufficient stent expansion and poor stent adhesion leading to stent failure, which is one of the main causes of ISR.

[0045] At present, the recommended treatment devices for in-stent restenosis after vascular calcification and insufficient stent expansion are mainly shock wave balloon catheters, cutting balloon catheters and drug balloon catheters. In clinical practice, shock wave balloon catheters, cutting balloon catheters and drug balloon catheters all require the additional combination of another high-pressure balloon catheter to modify the arterial lumen. This alternating use requires repeated insertion of different balloons along the working guidewire into and out of the patient's coronary artery. For the surgeon, it seriously prolongs the duration of the entire PCI operation, while increasing the surgical risk and the surgeon's workload, wasting medical resources to a certain extent. For patients, an operation consumes too many balloon consumables, increasing the medical burden.

[0046] To this end, the embodiment of the utility model provides a balloon catheter to solve the problem of single function of the existing balloon catheter. By installing multiple functional balloons on the tube body and configuring a corresponding charging cavity for each functional balloon, the functions of multiple balloon catheters are integrated on only one balloon catheter, which reduces the use of instruments during surgery, shortens the operation time, and improves the operation efficiency.

[0047] The embodiment of the utility model is to solve the above-mentioned problem of single function, and its technical solution is as follows:

[0048] The specific solution is to install multiple functional balloons on the tube body of a balloon catheter, each functional balloon has its own diseased blood vessel repair function, and each functional balloon is configured with a corresponding charging cavity and a balloon liquid inlet in the tube body. The balloon liquid inlet penetrates the outer wall of the tube body to connect the corresponding charging cavity and the functional balloon, so that each functional balloon has an independent charging cavity. Therefore, by filling the charging cavity with liquid to expand the functional balloon, the functional balloon can achieve its corresponding repair function in the diseased blood vessel, so that multiple different functional balloons can achieve multiple different repair functions. Therefore, in the treatment process of entering and exiting the patient's coronary artery, the functions of multiple balloon catheters can be used, which solves the problem of the single function of the existing balloon catheter, avoids the need to repeatedly enter and exit the patient's coronary artery due to alternating use, reduces the use of intraoperative instruments, shortens the operation time, improves the operation efficiency, and reduces the surgical risk and medical burden.

[0049] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] Reference Figure 1-Figure 14 The utility model embodiment proposes a balloon catheter, comprising: a tube body 1 and a plurality of functional balloons, wherein the plurality of functional balloons are mounted on the tube body 1, wherein the tube body 1 is provided with a plurality of charging cavities for charging the plurality of functional balloons, wherein each charging cavity corresponds to charging one functional balloon, and each charging cavity is provided with a corresponding balloon liquid inlet portion, wherein the balloon liquid inlet portion penetrates the outer wall of the tube body 1 to connect the charging cavity corresponding to the balloon liquid inlet portion with the interior of the functional balloon.

[0051] Reference Figure 1Specifically, a functional balloon refers to a balloon with a corresponding diseased blood vessel repair function, for example, a drug balloon can be used to treat diseased blood vessels with drugs; another example is a cutting balloon that can cut calcified tissue of diseased blood vessels; another example is a shock wave balloon that can emit shock waves to lyse calcified and narrowed tissue of blood vessels; another example is a high-pressure non-compliant balloon that can perform pipeline modification on diseased blood vessels. Of course, it can be understood that it can also be other balloons with different repair functions. In practical applications, it can be any combination of the above-mentioned different functional balloons. The number of pressurized channels in this embodiment is the same as the number of functional balloons. The pressurized channels penetrate the tube body 1 along the axial direction of the tube body 1, and the pressurized channels and the tube body 1 are integrally formed. Each pressurized channel has a corresponding balloon liquid inlet, which is arranged on the tube body 1 and located inside the functional balloon. The balloon liquid inlet penetrates the outer wall of the tube body 1 to connect the pressurized channel with the functional balloon. It should be noted that each balloon liquid inlet only connects the corresponding pressurized channel and the functional balloon, and each pressurized channel is independent of each other. The liquid inlet of the balloon can be a through hole, and the number of the through holes is an integer greater than or equal to 1. The liquid is filled into the pressure cavity, and the liquid can flow along the pressure cavity to the functional balloon, and be injected into the interior of the functional balloon through the balloon liquid inlet, so that the functional balloon expands to achieve its repair function.

[0052] Through this embodiment, the functions of multiple balloon catheters are integrated on one balloon catheter. During a treatment process of entering and exiting the patient's coronary artery, the functions of multiple balloon catheters can be used, avoiding the need to alternately use different balloons to repeatedly enter and exit the patient's coronary artery, reducing the use of instruments during the operation, shortening the operation time, improving the operation efficiency, and reducing the operation risk and medical burden.

[0053] Reference Figure 1In one embodiment, the functional balloon includes a first balloon 2 and a second balloon 3 disposed at the distal end of the tube body 1, the first balloon 2 and the second balloon 3 are spaced apart along the axial direction of the tube body 1, and the tube body 1 is provided with a first filling cavity 11 for filling the first balloon 2 and a second filling cavity 12 for filling the second balloon 3. Specifically, the balloon catheter of this embodiment is a double-cavity double-balloon catheter, the number of functional balloons is two, namely the first balloon 2 and the second balloon 3, and the corresponding filling cavities are also two, namely the first filling cavity 11 and the second filling cavity 12. The end of the tube body 1 close to the operator is the proximal end, and the end of the tube body 1 away from the operator is the distal end. The first balloon 2 and the second balloon 3 are both disposed at the distal end of the tube body 1, wherein the first balloon 2 and the second balloon 3 are closer to the distal end of the tube body 1, and the two are spaced apart along the axial direction of the tube body 1. During treatment, the first balloon 2 first reaches the location of the lesion for the primary treatment, and then the second balloon 3 reaches the location of the lesion for the secondary treatment. The first pressure-charging cavity 11 and the second pressure-charging cavity 12 are respectively connected to the first balloon 2 and the second balloon 3, and the first balloon 2 and the second balloon 3 are respectively filled with liquid to realize the corresponding repair functions of the first balloon 2 and the second balloon 3. Among them, those skilled in the art can configure the first balloon 2 and the second balloon 3 according to the order in which different repair functions need to be realized during the operation. This embodiment provides the following optional implementations, which are as follows.

[0054] Reference Figure 2 In an optional embodiment, the first balloon 2 is a shock wave balloon, and the second balloon 3 is a high-pressure non-compliant balloon. In a specific implementation, an electrode assembly 21 for generating shock waves is provided on the outer wall of the tube body 1 and inside the first balloon 2. Specifically, the electrode assembly 21 includes an inner electrode, an outer electrode and an insulating member. The electrode assembly 21 is a three-layer structure, from the inside to the outside, respectively, an inner electrode that fits the outer wall of the tube body 1, an insulating member and an outer electrode on the outermost layer. During operation, the electric arc breaks through the contrast fluid between the inner and outer electrodes, causing it to vaporize and expand to generate shock waves. The high-pressure non-compliant balloon material is hard in texture and has strong pressure resistance. It has the characteristics of being able to withstand higher pressures while the balloon will not undergo significant deformation. The deformation of the balloon after pressurization can reconstruct the morphology of the diseased blood vessels, thereby achieving lumen modification of the diseased blood vessels. In clinical use, the first balloon 2 is delivered to the site of calcified and narrowed blood vessels, and the shock wave generating component inside the first balloon 2 sends shock waves to the surrounding areas to lyse the calcified and narrowed tissues of the blood vessels, and the stenosis rate of the vascular lesion site is reduced under the expansion effect of the first balloon 2; the second balloon 3 is a high-pressure non-compliant balloon, and the high-pressure non-compliant second balloon 3 is used to expand the lesion site for the second time to further restore the blood supply capacity of the lesion blood vessels.

[0055] Reference Figure 3In an optional embodiment, the first balloon 2 is a drug balloon, and the second balloon 3 is a high-pressure non-compliant balloon. Specifically, the drug balloon can be provided with micropores on the outer wall of the balloon, and the drug is transported to the inside of the drug balloon, and then released through the micropores, so as to treat the lesion. Of course, it can be understood that it can also be a drug balloon with other structures, which can be set by those skilled in the art according to actual needs. A drug coating 22 is provided on the outer wall of the first balloon 2 of this embodiment. In clinical use, as the first balloon 2 expands, the drug coated on the outer surface of the first balloon 2 is attached to the stenosis of the blood vessel for drug treatment, and the stenosis of the blood vessel is expanded through the expansion of the first balloon 2 and the full release of the drug at the lesion is ensured; the second balloon 3 is a high-pressure non-compliant balloon, which, under the premise of the drug treatment of the first balloon 2, realizes the expansion degree of the stenosis of the blood vessel to a greater extent, improves the adhesion degree of the drug to the blood vessel after expansion and the treatment time / effect, improves the blood transport capacity, and improves the ability of the catheter to modify the lesion vascular site.

[0056] Reference Figure 4 In an optional embodiment, the first balloon 2 is a cutting balloon, and the second balloon 3 is a high-pressure non-compliant balloon. In this embodiment, a cutting piece 23 is provided on the outer wall of the first balloon 2. The cutting piece 23 can be a cutting blade, and a plurality of cutting blades are evenly provided on the surface of the cutting balloon. In clinical use, the first balloon 2 plays a role in cutting vascular stenosis plaques and calcified tissues, reducing the difficulty of the catheter to open the stenotic part of the blood vessel; the second balloon 3 is a high-pressure non-compliant balloon, which improves the balloon catheter lesion expansion ability. On the premise that the first balloon 2 cuts plaques and calcified tissues, the expansion degree of vascular stenosis is achieved to a greater extent, the blood supply capacity is improved, and the catheter's ability to modify the diseased blood vessel is improved.

[0057] In summary, in clinical applications, the double-balloon catheter of this embodiment firstly performs a first treatment on the vascular stenosis site through the first balloon 2 and the repair function attached to the first balloon 2, and then uses the high-pressure non-compliant characteristics of the second balloon 3 to re-modify the vascular lesion site that has been treated for the first time, in order to achieve a better vascular stenosis treatment effect in the same catheter intervention treatment.

[0058] In one embodiment, a guidewire lumen 13 is further provided in the tubular body 1. Specifically, the guidewire lumen 13 runs through the tubular body 1 along the axial direction, and the guidewire lumen 13 can be integrally formed with the tubular body 1, or can be separately provided with the tubular body 1. The guidewire lumen 13 is used to insert a guidewire, and the balloon can be guided to a desired position through the guidewire so that it can be positioned in the area to be treated.

[0059] In order to realize the formation of the above-mentioned first pressure-charging lumen 11, the second pressure-charging lumen 12 and the guidewire lumen 13 in the tube body 1, this embodiment provides the following optional implementation methods, which are as follows.

[0060] Reference Figure 5-Figure 7 In an optional embodiment, the tube body 1 is a hollow tube body 1, and an annular rib 101, a first connecting rib 102 and a second connecting rib 103 are provided on the cross section of the tube body 1, the center of the annular rib 101 is concentric with the center of the tube body 1, and the annular rib 101 is connected to the tube body 1 through the first connecting rib 102 and the second connecting rib 103 respectively; wherein the guide wire cavity 13 is formed inside the annular rib 101; one side of the annular rib 101, the first connecting rib 102, the second connecting rib 103 and the tube body 1 are enclosed to form the first pressurized cavity 11; the other side of the annular rib 101, the first connecting rib 102, the second connecting rib 103 and the tube body 1 are enclosed to form the second pressurized cavity 12.

[0061] In this embodiment, the tube body 1 is a cylindrical hollow tube body 1, and the tube body 1 is separated by ribs to separate the cavity. Specifically, an annular rib 101, a first connecting rib 102 and a second connecting rib 103 are provided in the tube body 1, and the first connecting rib 102 and the second connecting rib 103 are both in the shape of a straight line, and the annular rib 101 is provided at the center of the tube body 1, and the annular rib 101 is concentric with the tube body 1, and the diameter of the annular rib 101 is smaller than the diameter of the tube body 1. The two ends of the first connecting rib 102 are respectively connected to the tube body 1 and the annular rib 101, and similarly, the two ends of the second connecting rib 103 are also respectively connected to the tube body 1 and the annular rib 101. Among them, the first connecting rib 102 and the second connecting rib 103 are respectively located on both sides of the annular rib 101, the first connecting rib 102 and the second connecting rib 103 are on the same straight line, and the connecting line of the first connecting rib 102 and the second connecting rib 103 passes through the circle of the tube body 1 and the annular rib 101, thereby forming a shape as shown in the figure. The interior of the annular rib 101 located in the center is the guidewire lumen 13, and the guidewire enters and exits from the middle guidewire lumen 13. Half of the annular rib 101, the first connecting rib 102, the second connecting rib 103 and the tube body 1 together enclose a fan-shaped lumen, which is the first pressurized lumen 11. The other half of the annular rib 101, the first connecting rib 102, the second connecting rib 103 and the tube body 1 together enclose another fan-shaped lumen, which is the second pressurized lumen 12. In this way, two fan-shaped first pressurized lumens 11 and second pressurized lumens 12, and an annular guidewire lumen 13 are respectively formed in the tube body 1 by the method of this embodiment. The two pressurized lumens surround the middle guidewire lumen 13. The two pressurized lumens are close to the outer wall of the tube body 1, which is convenient for setting the liquid inlet part of the balloon. The structure is simple, the cavity volume is large, the liquid inlet efficiency is high, and the reliability is high.

[0062] Reference Figure 8 and Fig. 9In an optional embodiment, the tube body 1 is a hollow tube body 1, and a first hollow area 104, a second hollow area 105 and a third hollow area 106 are distributed on the cross section of the tube body 1. The first hollow area 104 forms the first pressurized cavity 11, the second hollow area 105 forms the second pressurized cavity 12, and the third hollow area 106 forms the guide wire cavity 13. Specifically, the tube body 1 is a solid cylindrical tube, and three independent cavities are passed through the axial direction of the tube body 1. The three cavities are three hollow areas on the cross section of the solid tube body 1, which are the first hollow area 104, the second hollow area 105 and the third hollow area 106. The three hollow areas can be various shapes, for example, they can be circles, regular polygons and the like. The three hollow areas in this embodiment are three circles distributed in a triangular manner, and the lines connecting the centers of the three circles form an equilateral triangle. In this way, three circular first pressure-charging cavities 11, second pressure-charging cavities 12 and guidewire cavities 13 are respectively formed in the tube body 1 through the method of this embodiment. The three cavities are arranged adjacent to each other, and the two pressure-charging cavities are also close to the outer wall of the tube body 1, which is convenient for setting the liquid inlet part of the balloon. The structure is simple, the cavity volume is large, the liquid inlet efficiency is high, and the reliability is high.

[0063] Reference Figure 10-12 In an optional embodiment, a separation rib 107 is provided on the cross section of the tube body 1, and the separation rib 107 is connected to the tube body 1 along the radial direction of the tube body 1. One side of the separation rib 107 and the tube body 1 are enclosed to form the first pressure-charging cavity 11, and the other side of the separation rib 107 and the tube body 1 are enclosed to form the second pressure-charging cavity 12. An inner catheter is provided in the second pressure-charging cavity 12, and the inner catheter is the guidewire cavity 13. Specifically, the separation rib 107 is linear, and the separation rib 107 radially separates the tube body 1, that is, it is arranged horizontally in the tube body 1 to divide the circular tube body 1 into two semicircular cavities. One of the semicircular cavities is the first pressure-charging cavity 11, and the other semicircular cavity is the second pressure-charging cavity 12. The two semicircular cavities can be of equal volume, or one can be larger and the other smaller. In this embodiment, the diameter of the second pressure-charging cavity 12 is larger than the diameter of the first pressure-charging cavity 11, that is, the semicircular cavity of the second pressure-charging cavity 12 is larger, which is convenient for accommodating the guidewire cavity 13. A guidewire cavity 13 is provided in the relatively larger second pressure-charging cavity 12, and the guidewire cavity 13 is an independent catheter, which is passed through the second pressure-charging cavity 12. In this way, two semicircular first pressure-charging cavities 11 and second pressure-charging cavities 12 and a guidewire cavity 13 of an independent catheter are respectively formed in the tube body 1 by the method of this embodiment, and the two pressure-charging cavities are also close to the outer wall of the tube body 1, which is convenient for setting the liquid inlet part of the balloon, with a simple structure, a large cavity volume, high liquid inlet efficiency, and high reliability.

[0064] Reference Fig. 9 In this embodiment, a front end face is provided at the end of the tube body away from the operator; that is, the cross section of the tube body at the front end of the tube body is the front end face, and the front end face serves as a reference face for determining the position of the balloon liquid inlet portion. The distal end of the tube body 1 is provided with a first balloon liquid inlet portion 111 connecting the first pressure-charging cavity 11 and the first balloon 2, and the axial distance between the first balloon liquid inlet portion 111 and the front end face is a first distance; the distal end of the tube body 1 is provided with a second balloon liquid inlet portion 121 connecting the second pressure-charging cavity 12 and the second balloon 3, and the axial distance between the second balloon liquid inlet portion 121 and the front end face is a second distance; wherein, the second distance is greater than the first distance. Specifically, the first pressure-charging cavity 11 has a corresponding first balloon liquid inlet portion 111, and the second pressure-charging cavity 12 has a corresponding second balloon liquid inlet portion 121. The first distance between the first balloon liquid inlet 111 and the front end face of the tube body 1 is L1, and the second distance between the second balloon liquid inlet 121 and the front end face of the tube body 1 is L2, wherein L2 is greater than L1. That is, the first balloon 2 is closer to the front end face of the tube body 1, and the second balloon liquid inlet 121 is relatively farther away. Then, the corresponding first balloon 2 is also closer to the front end face of the tube body 1, and the second balloon 3 is also relatively farther away. In this way, by controlling L1 and L2, the first balloon 2 and the second balloon 3 are distributed in sequence in the axial direction of the tube body 1, so that the first balloon 2 can preferentially reach the diseased part for preliminary treatment, and the second balloon 3 then performs secondary treatment on the diseased part. Optionally, the setting position of the first balloon liquid inlet 111 corresponds to the central area of ​​the first balloon 2, and the setting position of the second balloon liquid inlet 121 corresponds to the central area of ​​the second balloon 3.

[0065] Reference Fig.13 and Fig.14In this embodiment, the proximal end of the tube body 1 is provided with a first pressure-charging channel 11 liquid inlet and a second pressure-charging channel 12 liquid inlet, the first pressure-charging channel 11 liquid inlet and the second pressure-charging channel 12 liquid inlet penetrate the outer wall of the tube body 1 and are respectively connected with the first pressure-charging channel 11 and the second pressure-charging channel 12, the axial distances between the first pressure-charging channel 11 liquid inlet and the second pressure-charging channel 12 liquid inlet and the front end face are respectively the third distance and the fourth distance, and the third distance and the fourth distance are both greater than the second distance. Specifically, the first pressure-charging channel 11 is also provided with a corresponding first pressure-charging channel 11 liquid inlet, and the second pressure-charging channel 12 is also provided with a corresponding second pressure-charging channel 12 liquid inlet. The first pressure-charging channel 11 liquid inlet and the second pressure-charging channel 12 liquid inlet may be through holes, the number of through holes being an integer greater than 1, and the through holes are arranged at intervals along the axial direction of the tube body. The liquid inlet of the first pressure-charging cavity 11 passes through the outer wall of the tube body 1 and is only connected to the first cavity, so that the liquid can enter the first pressure-charging cavity 11 from the liquid inlet of the first pressure-charging cavity 11, and enter the first balloon 2 from the liquid inlet 111 for pressure charging. Similarly, the liquid inlet of the second pressure-charging cavity 12 passes through the outer wall of the tube body 1 and is only connected to the second cavity, so that the liquid can enter the second pressure-charging cavity 12 from the liquid inlet of the second pressure-charging cavity 12, and enter the second balloon 3 from the liquid inlet 121 for pressure charging. In order to achieve pressure charging and depressurization, the liquid inlet of the first pressure-charging cavity 11 and the liquid inlet of the second pressure-charging cavity 12 cannot be located inside the balloon, so it is necessary to control the positions of the liquid inlet of the first pressure-charging cavity 11 and the liquid inlet of the second pressure-charging cavity 12 so that they are located outside the two balloons. Specifically, the third distance between the liquid inlet of the first pressure-charging cavity 11 and the front end face of the tube body 1 is L3, and the fourth distance between the liquid inlet of the second pressure-charging cavity 12 and the front end face of the tube body 1 is L4, and it is necessary to ensure that L3>L2, L4>L2. That is, the liquid inlet of the first pressure-charging cavity 11 and the liquid inlet of the second pressure-charging cavity 12 are located farther from the front end face of the tube body 1 than the liquid inlet of the second balloon 121, so that it can be ensured that the liquid inlets of the two pressure-charging cavities are not inside the two balloons, ensuring the reliability of the pressure charging, and being closer to the proximal end of the tube body 1 for convenient pressure charging. The third distance and the fourth distance can be equal or unequal.

[0066] Continue to refer to Figure 1In this embodiment, the balloon catheter further comprises a catheter seat 4, on which a first charging port 41, a second charging port 42 and a guidewire channel 43 are provided. When the catheter seat 4 is connected to the proximal end of the tube body 1, the first charging port 41 and the second charging port 42 are respectively communicated with the liquid inlet of the first charging cavity 11 and the liquid inlet of the second charging cavity 12, and the guidewire channel 43 is communicated with the guidewire cavity 13. Specifically, the catheter seat 4 is provided with a first charging port 41, a second charging port 42 and a guidewire channel 43. The guidewire channel 43 penetrates along the axial direction of the catheter seat 4, and the first charging port 41 and the second charging port 42 are obliquely arranged on both sides of the guidewire channel 43. The catheter seat 4 is connected to the proximal end of the tube body 1, and can be fixed by bonding. When the catheter seat 4 is docked with the tube body 1, the first charging port 41 is aligned with the liquid inlet of the first charging cavity 11 to connect the two; the second charging port 42 is aligned with the liquid inlet of the second charging cavity 12 to connect the two. In this way, when the first charging port 41 is charged, the liquid can enter the first charging cavity 11 through the liquid inlet of the first charging cavity 11; when the second charging port 42 is charged, the liquid can enter the second charging cavity 12 through the liquid inlet of the second charging cavity 12; the guidewire channel 43 is aligned with the guidewire cavity 13, and the guidewire cavity 13 is connected with the guidewire channel 43, and the guidewire can enter the guidewire cavity 13 of the tube body 1 from the guidewire channel 43 of the catheter seat 4, and then pass through the tube body 1. Therefore, liquid can be injected into the two charging cavities through the two charging ports on the catheter seat 4 to charge the two balloons respectively.

[0067] Continue to refer to Figure 1 In this embodiment, the balloon catheter further comprises a tip portion 5, which is disposed at the distal end of the tube body 1, and blocks the first pressure-charging lumen 11 and the second pressure-charging lumen 12, and the guidewire lumen 13 passes through the tip portion 5 along the axial direction of the tube body 1. Specifically, the tip portion 5 mainly plays a sealing role, and is fixed to the distal end of the tube body 1, and can be fixed by bonding. When the tip portion 5 is fixed to the distal end of the tube body 1, the first pressure-charging lumen 11 and the second pressure-charging lumen 12 in the tube body 1 are blocked, so that the first pressure-charging lumen 11 and the second pressure-charging lumen 12 are sealed and cannot communicate with the external environment. In addition, a channel that passes through the axial direction of the tube body 1 is provided on the tip portion 5, and the channel is aligned with the guidewire lumen 13 of the tube body 1, so that the guidewire in the guidewire lumen 13 can pass through the tip portion 5.

[0068] Continue to refer to Figure 1, further, a developing ring 6 is provided in the first balloon 2 and / or the second balloon 3, and the developing ring 6 is installed on the outer wall of the tube body 1. Specifically, the first balloon 2 and the second balloon 3 are both provided with a developing ring 6, and the developing ring 6 is arranged on the outer wall of the tube body 1, and the developing ring 6 can mark the position of the balloon. Of course, it is understandable that the developing ring 6 can also be provided in only one balloon. For example, when the first balloon 2 is a shock wave balloon, the developing ring 6 may not be installed in the first balloon 2.

[0069] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A balloon catheter, characterized in that: include: A tube body and multiple functional balloons, multiple functional balloons are installed on the tube body, and multiple charging cavities for charging the multiple functional balloons are provided in the tube body, each charging cavity corresponds to charging one functional balloon, and each charging cavity is configured with a corresponding balloon liquid inlet portion, and the balloon liquid inlet portion penetrates the outer wall of the tube body to connect the charging cavity corresponding to the balloon liquid inlet portion with the interior of the functional balloon.

2. The balloon catheter according to claim 1, characterized in that: The functional balloon includes a first balloon and a second balloon arranged at the distal end of the tube body, the first balloon and the second balloon are spaced apart along the axial direction of the tube body, and the tube body is provided with a first inflation channel for inflating the first balloon and a second inflation channel for inflating the second balloon.

3. The balloon catheter according to claim 2, characterized in that: A guide wire cavity is also provided in the tube body.

4. The balloon catheter according to claim 3, characterized in that: An annular rib, a first connecting rib and a second connecting rib are provided on the cross section of the tube body, the center of the annular rib is concentric with the center of the tube body, and the annular rib is connected to the tube body through the first connecting rib and the second connecting rib respectively; wherein the guide wire cavity is formed inside the annular rib; one side of the annular rib, the first connecting rib, the second connecting rib and the tube body are combined to form the first pressurized cavity; the other side of the annular rib, the first connecting rib, the second connecting rib and the tube body are combined to form the second pressurized cavity.

5. The balloon catheter according to claim 3, characterized in that: A first hollow area, a second hollow area and a third hollow area are distributed on the cross section of the tube body. The first hollow area forms the first pressure-charging cavity inside, the second hollow area forms the second pressure-charging cavity inside, and the third hollow area forms the guidewire cavity inside.

6. The balloon catheter according to claim 3, characterized in that: A dividing rib is provided on the cross section of the tube body, and the dividing rib is connected to the tube body along the radial direction of the tube body. One side of the dividing rib and the tube body are combined to form the first pressure-charging cavity, and the other side of the dividing rib and the tube body are combined to form the second pressure-charging cavity. An inner catheter is provided in the second pressure-charging cavity, and the inner catheter is the guide wire cavity.

7. The balloon catheter according to claim 6, characterized in that: The diameter of the second pressure-charging cavity is greater than the diameter of the first pressure-charging cavity.

8. The balloon catheter according to claim 3, characterized in that: A front end face is provided at the end of the tube body away from the operator; a first balloon liquid inlet portion connecting the first pressure filling cavity and the first balloon is provided at the distal end of the tube body, and the axial distance between the first balloon liquid inlet portion and the front end face is a first distance; a second balloon liquid inlet portion connecting the second pressure filling cavity and the second balloon is provided at the distal end of the tube body, and the axial distance between the second balloon liquid inlet portion and the front end face is a second distance; wherein, the second distance is greater than the first distance.

9. The balloon catheter according to claim 8, characterized in that: The proximal end of the tube body is provided with a first pressure-charging cavity liquid inlet and a second pressure-charging cavity liquid inlet, the first pressure-charging cavity liquid inlet and the second pressure-charging cavity liquid inlet penetrate the outer wall of the tube body and are respectively connected with the first pressure-charging cavity and the second pressure-charging cavity, the axial distances between the first pressure-charging cavity liquid inlet and the second pressure-charging cavity liquid inlet and the front end face are respectively the third distance and the fourth distance, and the third distance and the fourth distance are both greater than the second distance.

10. The balloon catheter according to claim 9, characterized in that: The balloon catheter also includes a catheter seat, which is provided with a first charging port, a second charging port and a guidewire channel. When the catheter seat is connected to the proximal end of the tube body, the first charging port and the second charging port are respectively connected to the first charging cavity liquid inlet and the second charging cavity liquid inlet, and the guidewire channel is connected to the guidewire cavity.

11. The balloon catheter according to claim 3, characterized in that: The balloon catheter also includes a tip portion, which is arranged at the distal end of the tube body, and blocks the first and second inflation lumens. The guidewire lumen passes through the tip portion along the axial direction of the tube body.

12. The balloon catheter according to claim 2, characterized in that: A developing ring is arranged inside the first balloon and / or the second balloon, and the developing ring is mounted on the outer wall of the tube body.

13. The balloon catheter according to any one of claims 2 to 12, characterized in that: The first balloon is a shock wave balloon, and the second balloon is a high-pressure non-compliant balloon.

14. The balloon catheter according to claim 13, characterized in that: An electrode assembly for generating shock waves is arranged on the outer wall of the tube body and inside the first balloon.

15. The balloon catheter according to any one of claims 2 to 12, characterized in that: The first balloon is a drug balloon, and the second balloon is a high-pressure non-compliant balloon.

16. The balloon catheter according to claim 15, characterized in that: A drug coating is provided on the outer wall of the first balloon.

17. The balloon catheter according to any one of claims 2 to 12, characterized in that: The first balloon is a cutting balloon, and the second balloon is a high-pressure non-compliant balloon.

18. The balloon catheter according to claim 17, characterized in that: A cutting piece is provided on the outer wall of the first balloon.

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