CN114870210B

CN114870210B - Balloon dilatation catheter

Info

Publication number: CN114870210B
Application number: CN202210427633.5A
Authority: CN
Inventors: 盛泽元; 顾凡; 周毅
Original assignee: Jiangsu Pupeng Medical Technology Co ltd
Current assignee: Jiangsu Pupeng Medical Technology Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2025-04-08
Anticipated expiration: 2042-04-22
Also published as: CN114870210A

Abstract

The application provides a balloon dilation catheter which comprises a multi-cavity tube and a balloon, wherein a guide wire cavity and at least one liquid passing cavity are arranged in the multi-cavity tube, the balloon is connected to the liquid outlet end of the multi-cavity tube, a liquid filling cavity is formed between the balloon and the multi-cavity tube, a plurality of liquid outlet areas are arranged at the section of the multi-cavity tube, which is positioned in the liquid filling cavity, the liquid outlet areas are axially distributed along the multi-cavity tube, at least one liquid outlet hole is formed in each liquid outlet area, and the liquid outlet holes are communicated with the liquid passing cavity and the liquid filling cavity. The balloon dilation catheter can evenly dilate the balloon, and reduces the treatment cost.

Description

Balloon dilation catheter

Technical Field

The application relates to the technical field of medical instruments, in particular to a balloon dilation catheter.

Background

Percutaneous Transluminal Angioplasty (PTA) is a minimally invasive vascular dilation treatment procedure for treating vascular stenosis and occlusion in humans. The balloon dilation catheter is inserted into a narrow part of a blood vessel by adopting a percutaneous puncture technology, the balloon is pressurized under the guidance and monitoring of medical imaging equipment, and the atheromatous plaque or thrombus in the blood vessel is deformed or the blood vessel itself is dilated by mechanical dilation, so that the diameter of the blood vessel is changed, and the reconstruction of blood circulation is realized. PTA is a significant advance in the treatment of vascular disease. The main mechanism of balloon vasodilation is that the balloon is expanded to separate the stenotic and hardened intima, and simultaneously the strong layer of the smooth muscle of the media and the collagen fiber are destroyed to break the atherosclerosis plaque, and the media is stretched, so that the balloon vasodilation is a method for treating arteriosclerosis obliterans by mechanically expanding blood vessels to remodel. The implant can also be carried for use, such as a metal bracket and the like. Balloon dilation catheters are therefore an indispensable tool in this type of procedure.

The existing balloon dilation catheter is mainly characterized in that an expandable balloon is arranged at the distal end of the catheter with a certain axial length, and physiological saline or contrast solution is injected to dilate the balloon dilation catheter so as to prop up the lesion part of a blood vessel, thereby achieving the purpose of treatment. When the traditional balloon dilation catheter is filled with the implant, liquid enters the interior from one end of the balloon, so that the balloon is partially dilated first, and the balloon is unevenly dilated. When treating large lesions, the balloon with large diameter is needed, so that the uneven expansion mode can lead to the defects of overlong filling and pressure relief time of the large balloon, stent displacement, incapability of well positioning the lesion position and the like.

Disclosure of Invention

In order to solve the defects in the prior art, the balloon dilation catheter provided by the application can evenly dilate the balloon, and the treatment cost is reduced.

The application provides a balloon dilation catheter which comprises a multi-cavity tube and a balloon, wherein a guide wire cavity and at least one liquid passing cavity are arranged in the multi-cavity tube, the balloon is connected to the liquid outlet end of the multi-cavity tube, a liquid filling cavity is formed between the balloon and the multi-cavity tube, a plurality of liquid outlet areas are arranged at the section of the multi-cavity tube, which is positioned in the liquid filling cavity, the liquid outlet areas are axially distributed along the multi-cavity tube, at least one liquid outlet hole is formed in each liquid outlet area, and the liquid outlet holes are communicated with the liquid passing cavity and the liquid filling cavity.

Optionally, the liquid outlet hole is arranged on the wall of the multi-cavity tube and penetrates through the wall to be communicated with the liquid through cavity.

Optionally, a plurality of liquid through channels are arranged in the multi-cavity tube, each liquid outlet area is provided with a plurality of liquid outlet holes, and each liquid outlet hole is respectively communicated with each liquid through channel.

Optionally, at least two of the liquid-passing passages are disposed opposite to each other in a radial direction of the multi-lumen tube.

Optionally, the balloon includes a first connection section, a second connection section and an intermediate straight section, the first connection section and the second connection section are fixed in the multi-cavity tube in a manner of being opposite to each other, the intermediate straight section is connected between the first connection section and the second connection section, and a plurality of liquid outlet areas on the multi-cavity tube are located in areas covered by the first connection section, the intermediate straight section and the second connection section, or a plurality of liquid outlet areas on the multi-cavity tube are only located in areas covered by the intermediate straight section.

Optionally, the inner diameters of the middle straight section along the axial direction of the multi-cavity tube are the same, the middle straight section comprises a first straight part, a second straight part and a third straight part, the second straight part is connected between the first straight part and the third straight part, the first straight part is connected with the first connecting section, the third straight part is connected with the second connecting section, and the liquid outlet areas on the multi-cavity tube are only located in the area covered by the second straight part.

Optionally, a coating is arranged on the wall of the multi-cavity tube positioned in the liquid filling cavity, the coating covers all or part of the liquid outlet holes, and the coating is soluble in water-soluble liquid.

Optionally, the number of the liquid outlet areas is 3-100.

Optionally, the inner diameter of the liquid outlet hole is 0.1 mm-1 mm.

Optionally, the tip of multicavity pipe includes logical silk terminal surface and a plurality of logical liquid terminal surface, lead to the silk terminal surface to be located outside the liquid filling chamber, guide wire cavity way runs through lead to the silk terminal surface, a plurality of lead to the liquid terminal surface to be located in the liquid filling chamber, a plurality of lead to the liquid terminal surface along the axial of multicavity pipe is the ladder and arranges, be equipped with the many in the multicavity pipe and extend to each lead to the liquid terminal surface lead to the liquid cavity way, the drain hole runs through lead to the liquid terminal surface and with lead to the liquid cavity way intercommunication.

Optionally, the plurality of liquid-passing end surfaces include a first end surface and a second end surface, the vertical distance of the second end surface compared with the liquid-passing end surface is greater than the vertical distance of the first end surface compared with the liquid-passing end surface, the first end surface is provided with at least one liquid outlet hole, at least one liquid-passing cavity channel extends to the first end surface, the second end surface is provided with at least one liquid outlet hole, and at least one liquid-passing cavity channel extends to the second end surface.

Optionally, the balloon dilation catheter comprises at least one of:

The liquid through end faces further comprise third end faces, the vertical distance between the third end faces and the silk through end faces is larger than the vertical distance between the second end faces and the silk through end faces, at least one liquid outlet hole is formed in each third end face, and at least one liquid through cavity channel extends to the third end faces;

The liquid-passing end faces further comprise fourth end faces, the vertical distance between the fourth end faces and the silk-passing end faces is larger than the vertical distance between the third end faces and the silk-passing end faces, at least one liquid outlet hole is formed in each fourth end face, and at least one liquid-passing cavity channel extends to the fourth end faces.

Optionally, the balloon dilation catheter further comprises a connecting piece and a stress diffusion tube, the connecting piece is connected to the proximal end of the multi-cavity tube, the connecting piece comprises a silk-passing interface and a liquid inlet interface, the silk-passing interface is communicated with the silk-guiding cavity, the liquid inlet interface is communicated with each liquid-passing cavity, one end of the stress diffusion tube is connected to the tube wall of the multi-cavity tube, and the other end of the stress diffusion tube is connected to the connecting piece.

Optionally, the balloon dilation catheter further comprises a first visualization ring and a second visualization ring, the first visualization ring and the second visualization ring being positioned in the fluid-filled lumen and secured to the multi-lumen tube.

The balloon dilation catheter is provided with a plurality of liquid outlet holes along the axial direction on the multi-cavity tube, so that liquid in the liquid passage can flow out from the liquid outlet holes at a plurality of points, the effect of uniform expansion of the balloon along the axial direction is achieved, and the balloon is expanded into a vascular plastic shape or the carried implant on the balloon is released. When the balloon carries implant products to be filled, the contrast liquid is discharged from the liquid outlet holes, so that the balloon is uniformly expanded, the implant is positioned, and the release is accurate. In addition, the balloon can not change the existing length of the carried implant (such as a bracket or a covered bracket) when being expanded, and the carried implant can not be shortened, so that the judgment of doctors is affected, the operation time and risk are increased, and the treatment cost and the physical burden of patients are reduced.

Drawings

Fig. 1 is a schematic structural view of a balloon dilation catheter of a first embodiment of the present application.

Fig. 2 is a schematic view in partial cross-section of a balloon dilation catheter of a first embodiment of the application.

Fig. 3 is a schematic view in partial cross-section of a balloon dilation catheter of a second embodiment of the present application.

Fig. 4 is a schematic view in partial cross-section of a balloon dilation catheter of a third embodiment of the present application.

Fig. 5 is a schematic end view of a fourth embodiment of the present application showing the construction of a multi-lumen tube.

FIG. 6 is a schematic cross-sectional view of a fourth embodiment of a multi-lumen tube according to the present application.

Detailed Description

The application provides a balloon dilation catheter.

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

For the convenience of understanding of those skilled in the art, the following examples are provided to illustrate specific implementation procedures of the technical solution provided in the present application.

First embodiment

Fig. 1 is a schematic structural view of a balloon dilation catheter according to a first embodiment of the present application, fig. 2 is a schematic structural view of a balloon dilation catheter according to a first embodiment of the present application in a partial cross-section, as shown in fig. 1 and 2, the balloon dilation catheter comprises a multi-lumen tube 11 and a balloon 12, a guidewire lumen 102 and at least one liquid-passing lumen 103 are arranged in the multi-lumen tube 11, the balloon 12 is connected to a liquid outlet end of the multi-lumen tube 11, a liquid-filling lumen 101 is formed between the balloon 12 and the multi-lumen tube 11, a plurality of liquid-discharging areas are arranged at a section of the multi-lumen tube 11 located in the liquid-filling lumen 101, the plurality of liquid-discharging areas are arranged along an axial direction of the multi-lumen tube 11, each liquid-discharging area is provided with at least one liquid-discharging hole 104, and the liquid-discharging hole 104 communicates the liquid-passing lumen 103 with the liquid-filling lumen 101. In this embodiment, openings are provided at both ends of the balloon 12, the multi-lumen tube 11 passes through both openings of the balloon 12, and the balloon 12 is fixed to the multi-lumen tube 11 by means of heat fusion, so as to close both openings of the balloon 12.

The balloon dilation catheter is provided with a plurality of liquid outlet holes 104 along the axial direction on the multi-cavity tube 11, so that liquid in the liquid passage 103 can be discharged from a plurality of liquid outlet holes 104 at a plurality of points, the effect of axially and uniformly dilating the balloon 12 is achieved, and the balloon 12 is dilated into a vascular plastic shape or the carried implant on the balloon 12 is released. When the balloon 12 is filled with implant product, the contrast fluid is discharged from the plurality of liquid outlet holes 104, so that the balloon 12 is uniformly expanded to position the implant, and the release is accurate. And the balloon 12 does not change the existing length of the carried implant (such as a stent or a covered stent) when being expanded, so that the carried implant cannot be shortened, the judgment of doctors is affected, the operation time and the risk are increased, and the treatment cost and the physical burden of patients are reduced.

Optionally, the balloon dilation catheter further comprises a first developing ring 13 and a second developing ring 14, the first developing ring 13 and the second developing ring 14 being located in the fluid-filled lumen 101 and being fixed to the multi-lumen tube 11. In this embodiment, the first developing ring 13 and the second developing ring 14 are made of platinum iridium alloy, which is used for developing, so that the product position can be found in the operation process.

Optionally, the end of the multilumen tubing 11 extending beyond the balloon 12 is tapered to reduce trauma to the vessel during use.

Alternatively, the multilumen tubing 11 is made of a polymeric material.

Optionally, the balloon 12 is made of a polymer material, such as nylon 12 and pebax, but not limited thereto.

Alternatively, as shown in fig. 2, the liquid outlet 104 is disposed on the wall of the multi-lumen tube 11 and penetrates the wall to communicate with the liquid passage 103. In this embodiment, the axis of the liquid outlet hole 104 is perpendicular to the axis of the liquid passage 103.

Optionally, a plurality of liquid through channels 103 are arranged in the multi-cavity tube 11, each liquid outlet area is provided with a plurality of liquid outlet holes 104, and each liquid outlet hole 104 is respectively communicated with each liquid through channel 103. Because the multi-cavity tube 11 is internally provided with a plurality of liquid through channels 103, filling and pressure relief time can be greatly reduced, and the time for blocking blood flow is shortened.

Optionally, at least two access channels 103 are arranged diametrically opposite each other in the multi-lumen tube 11. For example, two liquid-passing channels 103 are arranged in the multi-cavity tube 11, the two liquid-passing channels 103 are symmetrically arranged along the radial direction of the multi-cavity tube 11, and the guide wire channel 102 is positioned between the two liquid-passing channels 103, or four liquid-passing channels 103 are arranged in the multi-cavity tube 11, wherein two liquid-passing channels 103 are symmetrically arranged along the radial direction of the multi-cavity tube 11, the other two liquid-passing channels 103 are symmetrically arranged along the radial direction of the multi-cavity tube 11, and the guide wire channel 102 is positioned between the four liquid-passing channels 103. The number of the liquid passage 103 can be freely designed according to practical needs, but is not limited thereto.

Optionally, the balloon 12 comprises a first connecting section 121, a second connecting section 122 and an intermediate straight section 123, the first connecting section 121 and the second connecting section 122 are fixed to the multi-lumen tube 11 in an opposite arrangement, the intermediate straight section 123 is connected between the first connecting section 121 and the second connecting section 122, and a plurality of liquid outlet areas on the multi-lumen tube 11 are only located in the area covered by the intermediate straight section 123. In this embodiment, the first connecting section 121 and the second connecting section 122 are horn-shaped, and the inner diameters of the first connecting section 121 and the second connecting section 122 gradually increase toward the direction approaching the middle straight section 123, wherein the first developing ring 13 is correspondingly disposed below the junction (shoulder of the balloon 12) between the first connecting section 121 and the middle straight section 123, and the second developing ring 14 is correspondingly disposed below the junction (shoulder of the balloon 12) between the second connecting section 122 and the middle straight section 123.

Optionally, the first connecting section 121 and the second connecting section 122 are respectively matched with two heat-shrinkable auxiliary materials, and are welded by heat fusion at 180-220 ℃.

Alternatively, the inner diameter of the middle straight section 123 is the same throughout the axial direction of the multi-lumen tube 11, the middle straight section 123 comprises a first straight portion 1231, a second straight portion 1232 and a third straight portion 1233, the second straight portion 1232 is connected between the first straight portion 1231 and the third straight portion 1233, the first straight portion 1231 is connected with the first connecting section 121, the third straight portion 1233 is connected with the second connecting section 122, and the plurality of liquid outlet areas on the multi-lumen tube 11 are located only in the area covered by the second straight portion 1232. Because the liquid outlet area is arranged corresponding to the middle part of the multi-cavity tube 11, when the balloon 12 is filled with implant products, contrast liquid flows from the liquid outlet hole 104 to the middle part of the balloon 12, the pressure intensity of the part with high flow velocity is small, so that the pressure intensity of the middle part of the balloon 12 is small, the pressure intensity of the two ends is large, and when the instantaneous flow is large enough, the balloon 12 expands from the middle part to the two ends to position the implant, so that the release is accurate.

Alternatively, the length of the first straight portion 1231 is equal to the length of the third straight portion 1233, and the length of the second straight portion 1232 is greater than or equal to the length of the first straight portion 1231.

Optionally, the number of the liquid outlet areas is 3-50, for example, 4, 5, 6, 10, 15, 20, 30, 40. In this embodiment, the liquid outlet regions are arranged at equal intervals along the axial direction of the multi-lumen tube 11, that is, the intervals between the two liquid outlet holes 104 of any two adjacent liquid outlet regions are equal.

Optionally, the number of the liquid outlet holes 104 of each liquid outlet area corresponds to the number of the liquid through channels 103, for example, when two liquid through channels 103 are arranged in the multi-cavity tube 11, two liquid outlet holes 104 are arranged in each liquid outlet area, the two liquid outlet holes 104 are respectively communicated with the two liquid through channels 103, when three liquid through channels 103 are arranged in the multi-cavity tube 11, three liquid outlet holes 104 are arranged in each liquid outlet area, the three liquid outlet holes 104 are respectively communicated with the three liquid through channels 103, and when four liquid through channels 103 are arranged in the multi-cavity tube 11, four liquid outlet holes 104 are arranged in each liquid outlet area, and the four liquid outlet holes 104 are respectively communicated with the four liquid through channels 103.

Optionally, the inner diameter of the liquid outlet hole 104 is 0.1 mm-1 mm, for example, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.8mm.

Optionally, the hole film and the electric drill are used to form the liquid outlet 104 on the multi-cavity tube 11, for example, the designed hole film is covered over the liquid passage 103 of the multi-cavity tube 11, and the electric drill with the diameter ranging from 0.1mm to 1mm is used to drill into the wall of the multi-cavity tube 11 by a depth ranging from 0.2mm to 1mm, so that the liquid passage 103 is formed without damaging the guide wire passage 102.

Optionally, the shape of the porous membrane is circular, triangular, square, but not limited thereto.

Optionally, the balloon dilation catheter further comprises a connecting piece 15 and a stress diffusion tube 16, the connecting piece 15 is connected to the proximal end of the multi-cavity tube 11, the connecting piece 15 comprises a harness cord interface 151 and a liquid inlet interface 152, the harness cord interface 151 is communicated with the guide wire cavity channels 102, the liquid inlet interface 152 is communicated with each harness cord cavity channel 103, one end of the stress diffusion tube 16 is connected to the wall of the multi-cavity tube 11, and the other end of the stress diffusion tube 16 is connected to the connecting piece 15. In this embodiment, the harness port 151 is used for interfacing with a guidewire, and the fluid inlet port 152 is used for interfacing with a filling pressure relief device.

Alternatively, the connecting member 15 is made of a polymer material, such as PC, but not limited thereto.

Alternatively, the stress-diffusing tube 16 is made of a polymer material, such as silica gel or polyurethane, but not limited thereto. The stress diffuser 16 acts to diffuse stress in the vicinity of the connection 15, avoiding stress concentration.

Second embodiment

Fig. 3 is a schematic view showing a partial sectional structure of a balloon dilation catheter according to a second embodiment of the present application, as shown in fig. 3, the balloon dilation catheter according to this embodiment is substantially identical to the balloon dilation catheter according to the first embodiment in that the placement position of the liquid outlet 104 is different.

Alternatively, as shown in FIG. 3, the plurality of fluid outlet areas on the multi-lumen tube 11 are located in the areas covered by the first connecting section 121, the middle straight section 123 and the second connecting section 122, that is, the sections of the multi-lumen tube 11 located in the fluid-filled chamber 101 are each provided with a greater number of fluid outlet areas than the areas covered by the second straight sections 1232, and the number of fluid outlet holes 104 is increased to increase the instantaneous flow rate.

Optionally, the number of the liquid outlet areas is 3-100, for example, 4, 6, 10, 15, 20, 30, 40, 60, 70, 90. In this embodiment, the liquid outlet regions are arranged at equal intervals along the axial direction of the multi-lumen tube 11, that is, the intervals between the two liquid outlet holes 104 of any two adjacent liquid outlet regions are equal.

Third embodiment

Fig. 4 is a schematic view showing a partial sectional structure of a balloon dilation catheter according to a third embodiment of the present application, as shown in fig. 4, the balloon dilation catheter according to this embodiment is substantially the same as the balloon dilation catheter according to the first embodiment or the second embodiment except that a coating 17 is provided on a wall of a multi-lumen tube 11 according to this embodiment located in a liquid filling lumen 101.

Alternatively, as shown in fig. 4, the coating 17 covers all or part of the liquid outlet holes 104, the coating 17 is soluble in water-soluble liquid, the coating 17 can be arranged on the multi-cavity tube 11 in a coating manner and is cured by ultraviolet light to block the liquid outlet holes 104, and the coating 17 can be quickly dissolved when contacting with the water-soluble liquid, for example, in 0.1-3 s. In this embodiment, the coating 17 is soluble in contrast media such as iopamidol, iopromide, etc., for example, a water-soluble coating 17 such as polyvinyl alcohol, polyol, water-soluble polyurethane, etc.

Optionally, the thickness of the coating 17 is controlled to control the dissolution time of the coating 17, and when the balloon 12 is filled, because the coating 17 covers the liquid outlet hole 104 to form a closed space, the contrast liquid can not flow into the balloon 12 instantly, and all liquid through channels 103 can be filled first until the coating 17 is dissolved for about 0.1-3 s. After the coating 17 is dissolved, the contrast liquid can be released instantaneously and simultaneously, so that the purpose of axially and uniformly expanding the balloon 12 is achieved, and the time for a doctor to adjust the release position of the implant is provided, so that the implant is released accurately, and the operability is high.

It should be noted that in actual use, different hole schemes may be selected for the length and diameter of the balloon 12. For example, for a balloon 12 having a length of the intermediate straight section 123 of less than or equal to 60mm and a diameter of less than or equal to 12mm, the balloon dilation catheter of the first and second embodiments may be used preferentially enough to allow for uniform axial expansion of the balloon 12 during inflation while minimizing axial foreshortening of the stent. For example, for a balloon 12 having a length of the intermediate straight section 123 greater than 60mm and a diameter greater than 12mm, the balloon dilation catheter of the third embodiment may be used.

According to the balloon dilation catheter disclosed by the application, the liquid outlet holes 104 are formed in the specified positions of the wall of the multi-cavity tube 11 or the liquid outlet holes 104 are matched with the coating 17, so that the flowing direction and time of water are designed in a phase-changing manner, the internal pressure of the instantaneous balloon 12 tends to be consistent, the dog bone effect is reduced to the greatest extent, and the balloon 12 can be evenly dilated. Moreover, the filling points can be enriched by punching the liquid outlet 104 on the wall of the multi-cavity tube 11, so that the instantaneous flow is increased, the filling pressure relief time is reduced, the time for blocking blood flow in the operation process is reduced, and the occurrence probability of operation complications is reduced. In addition, the balloon dilation catheter disclosed by the application is simple in welding process, does not need a complex accurate tool, saves cost and improves production efficiency.

Fourth embodiment

Fig. 5 is a schematic diagram of an end face structure of a multi-lumen tube according to a fourth embodiment of the present application, and fig. 6 is a schematic diagram of a cross-sectional structure of a multi-lumen tube according to a fourth embodiment of the present application, as shown in fig. 5 and 6, the balloon dilation catheter of this embodiment is substantially identical to the balloon dilation catheter structure of the first embodiment except for a partial structure of the multi-lumen tube 11.

Optionally, as shown in fig. 5 and 6, the end portion of the multi-cavity tube 11 includes a wire end surface 112 and a plurality of liquid end surfaces 113, the wire end surface 112 is located outside the liquid filling cavity 101, the wire cavity channel 102 penetrates through the wire end surface 112, the plurality of liquid end surfaces 113 are located in the liquid filling cavity 101, the plurality of liquid end surfaces 113 are arranged in a stepped manner along the axial direction of the multi-cavity tube 11, a plurality of liquid through cavities 103 extending to the liquid end surfaces 113 are arranged in the multi-cavity tube 11, and the liquid outlet holes 104 penetrate through the liquid end surfaces 113 and are communicated with the liquid through cavities 103. Because the liquid outlet holes 104 are arranged on the liquid through end face 113, and the liquid through end faces 113 are arranged in a step manner along the axial direction of the multi-cavity tube 11, the sections of the multi-cavity tube 11 positioned in the liquid filling cavity 101 can discharge water at multiple points, and the effect of axially and uniformly expanding the balloon 12 is achieved.

Optionally, the plurality of liquid through end surfaces 113 includes a first end surface 1131 and a second end surface 1132, the vertical distance between the second end surface 1132 and the wire through end surface 112 is greater than the vertical distance between the first end surface 1131 and the wire through end surface 112, the first end surface 1131 is provided with at least one liquid outlet hole 104, the at least one liquid through cavity 103 extends to the first end surface 1131, the second end surface 1132 is provided with at least one liquid outlet hole 104, and the at least one liquid through cavity 103 extends to the second end surface 1132. In this embodiment, four liquid through channels 103 are disposed in the multi-lumen tube 11, wherein two liquid through channels 103 extend to a first end surface 1131, the first end surface 1131 is provided with two liquid outlet holes 104 respectively communicating with the two liquid through channels 103, the other two liquid through channels 103 extend to a second end surface 1132, and the second end surface 1132 is provided with two liquid outlet holes 104 respectively communicating with the two liquid through channels 103.

Optionally, the plurality of liquid-passing end surfaces 113 further includes a third end surface 1133, the vertical distance between the third end surface 1133 and the wire-passing end surface 112 is greater than the vertical distance between the second end surface 1132 and the wire-passing end surface 112, the third end surface 1133 is provided with at least one liquid outlet hole 104, and the at least one liquid-passing channel 103 extends to the third end surface 1133. In this embodiment, six liquid through channels 103 are disposed in the multi-lumen tube 11, wherein two liquid through channels 103 extend to a first end surface 1131, the first end surface 1131 is provided with two liquid outlet holes 104 respectively communicated with the two liquid through channels 103, the two liquid through channels 103 extend to a second end surface 1132, the second end surface 1132 is provided with two liquid outlet holes 104 respectively communicated with the two liquid through channels 103, the two liquid through channels 103 extend to a third end surface 1133, and the third end surface 1133 is provided with two liquid outlet holes 104 respectively communicated with the two liquid through channels 103.

Optionally, the plurality of liquid through end surfaces 113 further includes a fourth end surface 1134, the vertical distance between the fourth end surface 1134 and the wire through end surface 112 is greater than the vertical distance between the third end surface 1133 and the wire through end surface 112, the fourth end surface 1134 is provided with at least one liquid outlet hole 104, and the at least one liquid through cavity 103 extends to the fourth end surface 1134. In this embodiment, eight liquid channels 103 are disposed in the multi-cavity tube 11, wherein two liquid channels 103 extend to a first end surface 1131, the first end surface 1131 is provided with two liquid outlets 104 respectively communicating with the two liquid channels 103, the two liquid channels 103 extend to a second end surface 1132, the second end surface 1132 is provided with two liquid outlets 104 respectively communicating with the two liquid channels 103, the two liquid channels 103 extend to a third end surface 1133, the third end surface 1133 is provided with two liquid outlets 104 respectively communicating with the two liquid channels 103, the two liquid channels 103 extend to a fourth end surface 1134, and the fourth end surface 1134 is provided with two liquid outlets 104 respectively communicating with the two liquid channels 103.

Optionally, the guidewire lumen 102 has a length of 1500mm, the fluid lumen 103 extending to the first end surface 1131 has a length of 1365mm, the fluid lumen 103 extending to the second end surface 1132 has a length of 1360mm, the fluid lumen 103 extending to the third end surface 1133 has a length of 1355mm, and the fluid lumen 103 extending to the fourth end surface 1134 has a length of 1350mm. In the present embodiment, the lengths of the guide wire channel 102 and the liquid passing channel 103 can be freely designed according to practical needs, but are not limited thereto.

Alternatively, the multiple fluid passages 103 shown in fig. 5 are disposed at equal intervals or unequal intervals around the circumference of the guide wire lumen 102, and the arrangement of the multiple fluid passages 103 is not limited thereto, for example, the multiple fluid passages 103 are sequentially arranged at intervals along the radial direction of the multi-lumen tube 11, or the multiple fluid passages 103 are irregularly arranged and can be freely selected according to actual needs.

It should be noted that the number of the liquid-passing end surfaces 113 and the number of the liquid-discharging holes 104 and the liquid-passing channels 103 at the end of the multi-lumen tube 11 can be freely designed according to practical needs, and the invention is not limited thereto.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. The individual technical features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the application are not described in detail in order to avoid unnecessary repetition.

Claims

1. The balloon dilation catheter is characterized by comprising a multi-cavity tube and a balloon, wherein a guide wire cavity and at least one liquid passing cavity are formed in the multi-cavity tube, the balloon is connected to a liquid outlet end of the multi-cavity tube, a liquid filling cavity is formed between the balloon and the multi-cavity tube, a plurality of liquid outlet areas are formed in a section, located in the liquid filling cavity, of the multi-cavity tube, the liquid outlet areas are distributed along the axial direction of the multi-cavity tube, at least one liquid outlet hole is formed in each liquid outlet area, and the liquid outlet holes are communicated with the liquid passing cavity and the liquid filling cavity; the balloon comprises a first connecting section, a second connecting section and an intermediate straight section, the first connecting section and the second connecting section are oppositely arranged and fixed on the multi-cavity tube, the intermediate straight section is connected between the first connecting section and the second connecting section, the inner diameters of the intermediate straight section along the axial direction of the multi-cavity tube are the same, the intermediate straight section comprises a first straight section, a second straight section and a third straight section, the second straight section is connected between the first straight section and the third straight section, the first straight section is connected with the first connecting section, the third straight section is connected with the second connecting section, a plurality of liquid outlet areas on the multi-cavity tube are only located in the area covered by the second straight section, a coating is arranged on the wall of the multi-cavity tube in the axial direction of the multi-cavity tube, the coating covers all liquid outlet holes, and can be dissolved in water in the liquid filling channel when the water filling balloon is filled with the liquid, and simultaneously the water-soluble coating is released from the water filling channel, thereby achieving uniform expansion of the balloon in the axial direction.

2. The balloon dilation catheter according to claim 1 wherein said exit port is disposed in a wall of said multi-lumen tube and communicates with said fluid passage through said wall.

3. The balloon dilation catheter according to claim 2 wherein a plurality of said fluid passages are provided in said multi-lumen tube, each of said fluid outlet regions having a plurality of fluid outlet openings, each of said fluid outlet openings being in communication with each of said fluid passages.

4. A balloon dilation catheter according to claim 3 wherein at least two of said fluid passing lumens are disposed opposite each other in a radial direction of said multi-lumen tube.

5. The balloon dilation catheter according to any one of claims 2-4 wherein said number of exit areas is 3-100.

6. The balloon dilation catheter according to any one of claims 2-4 wherein said exit orifice has an inner diameter of 0.1mm to 1mm.

7. The balloon dilation catheter according to claim 1 wherein an end portion of said multi-lumen tube comprises a wire end face and a plurality of fluid end faces, said wire end face being located outside said fluid-filled lumen, said wire lumen extending through said wire end face, a plurality of said fluid end faces being located in said fluid-filled lumen, a plurality of said fluid end faces being arranged in a stepwise manner along an axial direction of said multi-lumen tube, a plurality of said fluid lumen passages extending to each of said fluid end faces being provided in said multi-lumen tube, said fluid outlet extending through said fluid end face and communicating with said fluid lumen.

8. The balloon dilation catheter according to claim 7 wherein a plurality of said fluid passing end surfaces comprises a first end surface and a second end surface, said second end surface being at a greater vertical distance than said wire passing end surface than said first end surface, said first end surface being provided with at least one said fluid outlet aperture, at least one said fluid passing lumen extending to said first end surface, said second end surface being provided with at least one said fluid outlet aperture, at least one said fluid passing lumen extending to said second end surface.

9. The balloon dilation catheter according to claim 8 wherein said balloon dilation catheter comprises at least one of:

10. The balloon dilation catheter according to claim 1 further comprising a connector connected to a proximal end of said multi-lumen tube and comprising a guidewire port in communication with said guidewire lumen and a fluid inlet port in communication with each of said guidewire lumens, said stress diffuser having one end connected to a wall of said multi-lumen tube and another end connected to said connector.

11. The balloon dilation catheter according to claim 1 further comprising a first visualization ring and a second visualization ring, said first visualization ring and said second visualization ring being positioned in said fluid-filled lumen and secured to said multi-lumen tube.