CN213589483U - Balloon dilatation catheter - Google Patents

Abstract

The utility model relates to a balloon dilatation catheter, which comprises a catheter body and at least two balloons; at least two balloons are arranged on the outer surface of the far end of the catheter body at intervals along the axial direction of the catheter body; the catheter body is provided with at least two filling cavities which extend along the axial direction of the catheter body and are isolated from each other, and each filling cavity is communicated with one corresponding balloon and is used for infusing filling agent to the balloon. The balloon dilatation catheter comprises at least two balloons, and when the far end of the balloon dilatation catheter reaches a multi-segment stenosis or occlusion blood vessel, the at least two balloons can dilate the at least two stenosis or occlusion blood vessel segments, so that the intervention times are reduced, and the operation time is shortened.

Description

Balloon dilatation catheter

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to sacculus expansion pipe.

Background

Lower extremity atherosclerotic occlusion (PAD) is the formation of atherosclerotic plaques in the lower extremities, which leads to stenosis and occlusion of the lower extremity arteries, leading to chronic ischemia of the limb. In recent years, the incidence of PAD has been increasing year by year as the overall living standard of society has increased and artificial aging has increased.

PAD may be used to dilate a stenotic or occluded blood vessel using a balloon dilation catheter. PAD has the pathological features of multiple segments, and the balloon dilatation catheter in the prior art can only expand one segment at a time, so that multiple balloon catheter bodies are required to sequentially expand the segment with pathological changes in the current clinical treatment, the operation time and the blood flow blocking time in the operation are prolonged, great economic and psychological pressure is brought to patients, and even complications which are difficult to predict are caused. In addition, when the balloon dilatation catheter in the prior art is used for dilatation, the borne filling pressure is high, and the blood vessel is easily damaged or a sandwich is easily formed. In addition, the lesion is easily restenosis or reocclusion in a short time by only expanding the occluded blood vessel, and even if a stent is implanted after the blood vessel is expanded, the stent may be restenosis after a certain time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sacculus expansion pipe, this sacculus expansion pipe can just expand a plurality of block segments when once implanting, shortens the time of blocking the blood flow in operation time and the operation.

In order to achieve the purpose, the utility model provides a balloon dilatation catheter, which comprises a catheter body and at least two balloons; at least two balloons are arranged on the outer surface of the far end of the catheter body at intervals along the axial direction of the catheter body; the catheter body is provided with at least two filling cavities which extend along the axial direction of the catheter body and are isolated from each other, and each filling cavity is communicated with one corresponding balloon and is used for infusing filling agent to the balloon.

Optionally, the catheter body comprises a pusher tube and an inner tube disposed at a distal end of the pusher tube; the pushing pipe is provided with a wire guide cavity and the filling cavity; the inner tube is communicated with the guide wire cavity; at least one sacculus cover is established on the surface of inner tube, at least one sacculus cover is established on the distal end surface of propelling movement pipe.

Optionally, the guidewire lumen is circular in cross-section.

Optionally, the sacculus with the quantity that fills the chamber is two, the wire guide chamber with the propelling movement pipe is arranged coaxially, two it is relative to fill the chamber the axis symmetric distribution in wire guide chamber.

Optionally, the cross-section of the filling cavity is circular arc.

Optionally, the device further comprises a connector disposed at the proximal end of the pushing tube and including a first interface, a second interface and a third interface, wherein the first interface is coaxially disposed with the guide wire lumens and is communicated with each other, and the second interface and the third interface are respectively communicated with one of the filling lumens.

Optionally, the device further comprises a stress diffusion tube and a connecting piece, wherein the connecting piece is arranged at the proximal end of the pushing tube, and the stress diffusion tube is sleeved on the outer surface of the proximal end of the pushing tube and connected with the distal end of the connecting piece.

Optionally, the catheter further comprises a first hydrophilic coating disposed on at least a portion of the outer surface of the catheter body between the two balloons.

Optionally, the at least two balloons include a second balloon nearest the proximal end of the catheter body, the balloon dilation catheter further including a second hydrophilic coating disposed on an outer surface of the catheter body near the proximal end of the second balloon.

Optionally, the balloon is a high pressure balloon.

Optionally, the catheter further comprises a plurality of developing elements, wherein the plurality of developing elements are arranged on the catheter body and are respectively arranged corresponding to two axial ends of each balloon.

Optionally, a drug coating is included, coated on the outer surface of each of the balloons.

Optionally, each of the balloons includes five folding wings arranged along a circumferential direction of the balloon.

Compared with the prior art, the utility model discloses a sacculus expansion pipe has following advantage:

the balloon dilatation catheter comprises a catheter body and at least two balloons, wherein the at least two balloons are arranged on the outer surface of the distal end of the catheter body at intervals along the axial direction of the catheter body; the catheter body is provided with at least two filling cavities which extend along the axial direction of the catheter body and are isolated from each other, and each filling cavity is communicated with one corresponding balloon and is used for infusing filling agent to the balloon. After the far end of the balloon catheter body is implanted into a human blood vessel, the far end of the balloon catheter body can be sequentially or simultaneously filled with at least two balloons, so that at least two narrow or occluded sections can be conveniently expanded, the operation time and the blood flow blocking time are shortened, the intervention times of vascular diseases in clinic are reduced, and the at least two balloons can realize independent expansion or contraction control, and are more suitable for various requirements on the catheter in clinic.

Furthermore, the number of the saccules and the number of the filling cavities are two, and the two filling cavities are respectively communicated with the two saccules; still be provided with the seal wire chamber on the pipe body, seal wire chamber with pipe body coaxial arrangement, two the filling chamber is for seal wire chamber's axis symmetry arranges. By the arrangement, the space of the two filling cavities is maximized while the pushing supporting force of the catheter body is ensured, so that the filling and contraction time of the two balloons is shortened, and the time for operation and blood flow blocking is shortened.

Further, the saccule is a high-pressure saccule, so that damage to blood vessels is reduced in the saccule expansion process, and the incidence rate of blood vessel interlayer is reduced.

Furthermore, the hydrophilic coating is arranged on the upper part of the catheter body to reduce the friction force between the catheter and the blood vessel, and the rest of the catheter body is not provided with the hydrophilic coating, so that the design is favorable for ensuring the good controllability and trackability of the catheter

Further, the balloon also comprises a drug coating which is coated on the outer surface of the balloon, and the drug carried in the drug coating can be released and acts on the blood vessel during the expansion process of the balloon, so that the restenosis or the reocclusion of the blood vessel is inhibited. Each balloon is subjected to folding treatment, so that the balloon comprises five folding wings arranged along the circumferential direction of the balloon, and the folded balloon can better store and protect the drug coating and prevent the compression grips contained in the drug coating from falling off during the delivery process. In addition, the folding treatment is also beneficial to reducing the outer diameter of the balloon and is convenient for conveying.

Drawings

The accompanying drawings are included to provide a better understanding of the present invention and are not intended to constitute an undue limitation on the invention. Wherein:

fig. 1 is a schematic structural view of a balloon dilation catheter according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a pusher tube of a balloon dilation catheter provided in accordance with an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a balloon dilation catheter provided in accordance with an embodiment of the present invention;

fig. 4 is a schematic view of the balloon dilation catheter according to an embodiment of the present invention after cutting the distal end of the original tube of the pusher tube;

fig. 5 is a schematic view of the balloon dilation catheter provided in accordance with an embodiment of the present invention with the inner tube abutting the distal end of the pusher tube;

fig. 6 is a schematic view of a push tube of a balloon dilation catheter according to an embodiment of the present invention after cutting a proximal end of a raw tubular material;

fig. 7 is a schematic view illustrating the first connection tube and the second connection tube disposed at the proximal end of the original tube of the push tube of the balloon dilatation catheter according to an embodiment of the present invention.

[ reference numerals are described below ]:

100-a catheter body;

110-a push tube;

111-filling lumen, 111 a-first filling lumen, 111 b-second filling lumen, 112-guidewire lumen;

120-an inner tube;

130-a tapered tip;

200-balloon, 200 a-first balloon, 200 b-second balloon;

210-proximal taper, 220-straight, 230-distal taper, 240-folding wing;

300-drug coating;

400-a connector;

410-a first interface, 420-a second interface, 430-a third interface;

500-stress diffusion tube;

600-a developing element;

600 a-first development ring, 600 b-second development ring, 600 c-third development ring, 600 d-fourth development ring;

710-a first connection pipe, 720-a second connection pipe;

20-heat shrinkable tube.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Furthermore, each embodiment described below has one or more technical features, which does not mean that all technical features of any embodiment need to be implemented simultaneously by a person using the present invention, or that all technical features of different embodiments can be implemented separately. In other words, in the implementation of the present invention, based on the disclosure of the present invention, and depending on design specifications or implementation requirements, a person skilled in the art can selectively implement some or all of the technical features of any embodiment, or selectively implement a combination of some or all of the technical features of a plurality of embodiments, thereby increasing the flexibility in implementing the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.

In the following description, "proximal" and "distal" are relative orientations, relative positions, and directions of elements or actions with respect to each other from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting, "proximal" generally refers to the end of the medical device that is closer to the clinician during normal operation, and correspondingly, "distal" generally refers to the end of the medical device that is first introduced into the body during normal operation.

Fig. 1 shows a schematic structural view of a balloon dilatation catheter according to a preferred embodiment of the present invention. As shown in fig. 1, the balloon dilatation catheter includes a catheter body 100 and at least two balloons 200, the at least two balloons 200 are disposed on the distal outer surface of the catheter body 100 at intervals along the axial direction of the catheter body 100. The catheter body 100 has at least two filling cavities extending axially along the catheter body and isolated from each other, each of the filling cavities communicating with a corresponding one of the balloons 200 for infusing a filling agent into the balloon 200. At least two balloons 200 are arranged at intervals at the distal end of the catheter body 100, and after the distal end of one balloon dilatation catheter is pushed into a patient, filling agents can be simultaneously or sequentially poured into the at least two balloons 200 to dilate at least two narrow or occluded vessel segments, so that the intervention times are reduced, the operation time is shortened, and the blood flow blocking time is shortened. In this embodiment, the filling agent is preferably a contrast agent. And each of the filling cavities 111 is communicated with a corresponding one of the balloons 200, so that each of the balloons 200 can be independently filled or deflated to adapt to various conditions of clinical treatment.

The specific structure of the balloon dilatation catheter will be described herein by taking the two balloons 200 and the two filling cavities 111 as an example. For ease of distinction, the two balloons 200 are referred to as a first balloon 200a and a second balloon 200b, respectively, with the first balloon 200a being closer to the distal end of the catheter body 100. The filling lumen 111 in communication with the first balloon 200a is referred to as a first filling lumen 111a, and the filling lumen 111 in communication with the second balloon 200b is referred to as a second filling lumen 111 b. Those skilled in the art may modify the description below to accommodate situations where the balloon dilation catheter includes more than three balloons and more than three inflation lumens.

Referring to fig. 1 in combination with fig. 2, in the present embodiment, the catheter body 100 includes a pushing tube 110 and an inner tube 120. The push tube 110 is provided with the filling lumen (i.e. the first filling lumen 111a and the second filling lumen 111b) and a guide wire lumen 112, and the guide wire lumen 112 is used for passing a guide wire (not shown). The inner tube 120 is disposed at the distal end of the push tube 110 and is in communication with the guidewire lumen 112. The first balloon 200a is sleeved on the outer surface of the inner tube 120, and the second balloon 200b is sleeved on the outer surface of the distal end of the push tube 110. By disposing the two balloons 200 on the inner tube 120 and the pushing tube 110, respectively, the distal outer diameter of the balloon dilatation catheter (here, the distal outer diameter refers to the outer diameter of the balloon in the crimped state) is advantageously reduced, and the delivery is facilitated. Further, the catheter body 100 also includes a tapered tip 130, the tapered tip 130 being disposed at the distal end of the inner tube 120 and extending from the distal end of the first balloon 200a to facilitate passage through a stenotic or occluded blood vessel. As will be appreciated by those skilled in the art, the tapered tip 130 is a hollow structure and is in communication with the inner tube 120.

In this embodiment, the distance between the proximal end of the first balloon 200a and the distal end of the second balloon 200b is selected between 20mm-200mm, depending on the distance between the stenotic or occluded vessel segments of the patient. The first balloon 200a and the second balloon 200b may or may not be the same size, depending on the length and diameter of each stenotic or occluded segment of the blood vessel. Preferably, each balloon 200 is a high pressure balloon, which when the balloon 200 is expanded, can reduce the damage to the blood vessel and reduce the occurrence probability of blood vessel dissection. Each of the balloons 200 may have a diameter of 3mm to 7mm, a length of 20mm to 220mm, and a pressure of 18atm to 30 atm.

With continued reference to fig. 1, each of the balloons 200 may include a proximal tapered portion 210, a straight portion 220, and a distal tapered portion 230, with the distal end of the first filling lumen 111a extending to the proximal tapered portion 210 of the first balloon 200a and the distal end of the second filling lumen 111b extending to the proximal tapered portion 210 of the second balloon 200 b. Preferably, the balloon dilation catheter further comprises a drug coating 300, the drug coating 300 being disposed on an outer surface of the straight portion 210 of the first balloon 200a and an outer surface of the straight portion 210 of the second balloon 200 b. The medicines contained in the medicine coating can be paclitaxel, rapamycin and other medicines with the capacity of inhibiting cell proliferation, and the medicines are released along with the expansion of the balloon 200 and act on the blood vessel wall, so that the purpose of inhibiting the restenosis of the blood vessel is achieved. More preferably, the first balloon 200a and the second balloon 200b are both subjected to folding treatment, so that on one hand, the folded balloons 200 can better store and protect the drug coating, and the drug coating is prevented from falling off during the delivery process; on the other hand, the folding treatment can further reduce the outer diameter of the balloon 200 in a pressing and holding state, and is convenient to convey. The balloon 200 after the folding process includes several folding wings, and the present embodiment has no limitation on the number of the folding wings of the balloon 200, and in one embodiment, as shown in fig. 3, the first balloon 200a includes five folding wings 240, and the second balloon 200b may also include five folding wings. In other embodiments, the number of folding wings 240 included in the first balloon 200a and the second balloon 200b may be different, and the number of folding wings 240 may be three, four, six, and the like. The process of folding the balloon is well known to those skilled in the art and will not be described in detail here.

Next, referring back to fig. 1 and 2, the balloon dilation catheter further includes a connector 400, the connector 400 is disposed at the proximal end of the push tube 110, and includes a first port 410, a second port 420 and a third port 430, wherein the first port 410 is coaxially disposed with the guide wire lumen 112 and is communicated with the guide wire lumen, and the second port and the third port 430 are respectively communicated with the two filling lumens 111. The second interface 420 and the third interface 430 are used to connect with a syringe respectively, so as to fill or discharge the first balloon 200a and the second balloon 200b with filling agent, and control the filling or the contraction of the first balloon 200a and the second balloon 200 b.

Referring back to fig. 2, the guidewire lumen 112 is circular in cross-section, and the guidewire lumen 112 is coaxially disposed with the push tube 110. The two filling lumens 111 are symmetrically arranged about the axis of the push tube 110. It is further preferred that the cross-sections of the first and second filling cavities 111a, 111b are circular. With this arrangement, from the viewpoint of the use performance, not only can the pushing tube 110 have sufficient supporting force to ensure the pushing performance, but also the space of the two filling cavities 111 can be maximized, the filling and contraction time of the balloon 200 can be shortened, and the operation time can be further shortened. From the viewpoint of manufacturing process, the filling lumen 111 and the guide wire lumen 112 with such cross-sectional shapes facilitate both the manufacturing of the push tube 110 itself and the cutting of the original tube material of the push tube 110 for the assembly of the push tube 110 with the inner tube 120 and the connector 400. The cutting of the original tubing of the push tube 110 and the assembly thereof with the inner tube 120 and the connector 400 will be described in detail later.

In the process of pushing the distal end of the balloon dilation catheter to the lesion, the operator applies a pushing force to the connector 400, and the connector 400 transmits the pushing force to the push tube 110. In order to avoid the bending of the push tube 110, in this embodiment, it is preferable that the balloon dilatation catheter further includes a stress diffusion tube 500, and the stress diffusion tube 500 is sleeved on the outer surface of the proximal end of the push tube 110 and is connected to the distal end of the connecting member 400. The stress diffusion tube 500 is made of flexible materials such as silica gel.

Further, the balloon dilation catheter further comprises a first hydrophilic coating (not shown) disposed on at least a portion of an outer surface of the pusher tube 110 between the proximal end of the first balloon 200a and the distal end of the second balloon 200 b. More preferably, the balloon dilation catheter further comprises a second hydrophilic coating (not shown) disposed on an outer surface of a portion of the pusher tube 110 adjacent the proximal end of the second balloon 200 b. The hydrophilic coating is arranged to reduce the friction force between the balloon dilatation catheter and the vessel wall during pushing in the blood vessel, so that the balloon dilatation catheter is beneficial to pushing. While the proximal outer surface of the push tube 110 is not provided with a hydrophilic coating in order to ensure steerability and pushability of the push tube 110.

With continued reference to fig. 1, the balloon dilation catheter further includes a visualization element 600, wherein the visualization element 600 is used to show the position of the first balloon 200a and the second balloon 200 b. The present invention is not particularly limited to the number and the specific arrangement position of the developing elements 600. Generally, the number of the developing units 600 is plural, and a plurality of the developing units 600 are provided on the catheter body 100 and arranged corresponding to both axial ends of each of the balloons 200. Specifically, the developing member 600 may include four developing rings, i.e., a first developing ring 600a, a second developing ring 600b, a third developing ring 600c, and a fourth developing ring 600 d. Wherein the first developing ring 600a and the second developing ring 600b are disposed on the inner tube 120 for displaying the position of the first balloon 200a, and the first developing ring 600a is located at the distal side of the drug coating 300 on the first balloon 200a, and the second developing ring 600b is located at the proximal side of the drug coating 300 on the first balloon 200 a. The third and fourth visualization rings 600c and 600d are disposed on the portion of the push tube 110 inside the second balloon 200b, with the third visualization ring 600c disposed on the distal side of the drug coating 300 on the second balloon 200b and the fourth visualization ring 600d disposed on the proximal side of the drug coating 300 on the second balloon 200 b.

Next, the assembling method of the pushing tube 110 and the inner tube 120, the connector (not shown in fig. 4 to 7) will be described with reference to fig. 4 to 7.

The assembly process of the push tube 110 and the inner tube 120 is as follows:

the original tubing and the inner tube 120 of the pusher tube 110 are provided, both the filling lumen 111 and the guidewire lumen 112 being flush at the proximal and distal ends of the original tubing.

Cutting the lumen wall of the guidewire lumen 112 at the distal end of the original tubing (the lumen wall of the first and second filling lumens 111a and 111b should not be damaged) such that the distance from the distal end of the guidewire lumen 112 to the first filling lumen 111a is a first predetermined distance, while cutting the lumen wall of the second filling lumen 111b away from the side of the guidewire lumen 112 such that the distance from the distal end of the second filling lumen 111b to the distal end of the first filling lumen 111a is a second predetermined distance. The distal end of the cut raw tubing is shown in fig. 4.

A liner (not shown) is inserted into the first filling cavity 111a and the inner tube 120 to support the walls of the first filling cavity 111a and the inner tube 120, respectively, from deformation during subsequent processing.

The inner tube 120 is inserted into the distal end of the guidewire lumen 112 (the outer diameter of the inner tube 120 is slightly smaller than the inner diameter of the guidewire lumen 112 to facilitate insertion into the docking), and the liner in the inner tube 120 is inserted into the guidewire lumen 112.

A heat shrinkable tube 20 is fitted around the junction of the inner tube 120 and the original tubing (as shown in fig. 5).

The heat shrinkable tube 20 is heated.

And after the heat shrinkable tube 20 is cooled, peeling off the heat shrinkable tube 20.

The inner tube 120 and the push tube 110 are assembled by the method, so that the outer diameter of the distal end of the balloon dilatation catheter is reduced, and the balloon dilatation catheter is convenient to deliver.

The process of assembling the push tube 110 and the connector 11 is as follows:

a liner is inserted into both the filling lumen 111 and the guidewire lumen 112 of the raw tubing.

Cutting two cavity walls of the filling cavity 111 (the cavity walls of the guidewire cavity 112 should not be damaged) at the proximal end of the original tube material, so that the distance from the proximal end of the first filling cavity 111a to the proximal end of the guidewire cavity 112 is a third predetermined distance, and the distance from the proximal end of the second filling cavity 111b to the proximal end of the guidewire cavity 112 is a fourth predetermined distance. The proximal end of the original tubing is shaped after cutting as shown in fig. 6.

Keep away from first filling chamber 111a set up the perfusion hole (the drawing is not shown) on the chamber wall of guide wire chamber 112 one side, and second filling chamber 111b keeps away from set up the perfusion hole (not shown in the figure) on the chamber wall of guide wire chamber 112 one side.

A connection area is defined on the raw tubing, which is located a fifth predetermined distance from the guidewire lumen 112. A first connection pipe 710 is sleeved on the connection region.

A heat shrinkable tube 20 is fitted over the outer surface of the first connection tube 710.

The heat shrinkable tube is heated to fixedly connect the first connection tube 710 with the original tube.

The liners in the first filling cavity 111a and the second filling cavity 111b are removed, and a second connecting tube 720 is sleeved on the proximal end of the original tube, and the second connecting tube 720 covers the proximal cavity walls of the first filling cavity 111a and the second filling cavity 111b (as shown in fig. 7).

Another heat shrinkable tube 20 is sleeved on the outer surface of the second connection tube 720, and the heat shrinkable tube 20 is heated, so that the second connection tube 720 is fixedly connected to the original tube, and the proximal ends of the first filling cavity 111a and the second filling cavity 111b are closed.

After cooling, the heat shrinkable tube 20 is peeled off.

Then, the proximal end of the original tubing is inserted into the interior of the connector from the proximal end of the connector, so that the guidewire lumen 112 is communicated with the first port, the perfusion hole in the first filling lumen 111a is communicated with the second port, the perfusion hole in the second filling lumen 111b is communicated with the third port, and the first connecting tube 710 is disposed adjacent to the distal end of the connector and at least partially located in the interior of the connector. Finally, the first connection pipe 710 and the second connection pipe 720 are respectively connected with the inner wall of the connection piece in a sealing manner by a dispensing or injection molding process.

By assembling the pushing pipe, the inner pipe and the connecting piece in the above manner, the connection tightness can be ensured, and leakage is avoided. In addition, as will be understood by those skilled in the art, the first predetermined distance, the second predetermined distance, the third predetermined distance, the fourth predetermined distance and the fifth predetermined distance are determined according to actual situations.

And after the inner tube, the pushing tube and the connecting piece are assembled, assembling the balloon to the far ends of the inner tube and the pushing tube. Next, a liner is passed from the first interface of the connector into the guidewire lumen, the inner tube, and the tapered tip and further out the distal end of the tapered tip (or, the liner is passed from the distal end of the tapered tip into the guidewire lumen and further out the first interface). Then, the second interface or the third interface is connected with an interface of a folding and squeezing device (Machine Solutions Inc.) to open the corresponding folding and squeezing procedure. And then, slowly pushing the first balloon into a folding and pressing device to carry out folding and pressing treatment, wherein the first balloon and the folding and pressing device are ensured to be coaxial in the process. And pushing out the first sacculus after the folding and pressing are finished, and checking whether the folding wings are uniform or not. And then, pushing the first balloon into the folding and pressing equipment again for folding and pressing, and detecting the pressing and pressing condition of the first balloon after the folding and pressing are finished, wherein the first balloon is detected whether the first balloon has abnormal conditions such as flanging, wrinkles and the like. And then, carrying out folding and pressing treatment on the second balloon, wherein the folding and pressing treatment process of the second balloon is the same as that of the first balloon, and the details are not repeated here.

Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (13)

1. The balloon dilatation catheter is characterized by comprising a catheter body and at least two balloons; at least two balloons are arranged on the outer surface of the far end of the catheter body at intervals along the axial direction of the catheter body; the catheter body is provided with at least two filling cavities which extend along the axial direction of the catheter body and are isolated from each other, and each filling cavity is communicated with one corresponding balloon and is used for infusing filling agent to the balloon.

2. The balloon dilation catheter of claim 1, wherein the catheter body comprises a pusher tube and an inner tube disposed at a distal end of the pusher tube; the pushing pipe is provided with a wire guide cavity and the filling cavity; the inner tube is communicated with the guide wire cavity; at least one sacculus cover is established on the surface of inner tube, at least one sacculus cover is established on the distal end surface of propelling movement pipe.

3. The balloon dilation catheter according to claim 2, wherein the guidewire lumen is circular in cross-section.

4. A balloon dilation catheter according to claim 2 or 3, wherein the number of the balloon and the filling lumens are two, the guidewire lumen is coaxially arranged with the push tube, and the two filling lumens are symmetrically distributed with respect to the axis of the guidewire lumen.

5. The balloon dilation catheter of claim 4 wherein the filling lumen is circular in cross-section.

6. The balloon dilation catheter according to claim 4, further comprising a connector disposed at a proximal end of the pusher tube and including a first port, a second port and a third port, wherein the first port is coaxially disposed with the guidewire lumen and is in communication with each other, and the second port and the third port are in communication with one of the filling lumens, respectively.

7. The balloon dilation catheter of claim 2 further comprising a stress spreader tube and a connector disposed on a proximal end of the pusher tube, the stress spreader tube being sleeved on an outer surface of the proximal end of the pusher tube and connected to a distal end of the connector.

8. The balloon dilation catheter of claim 1 further comprising a first hydrophilic coating disposed on at least a portion of an outer surface of the catheter body between the two balloons.

9. A balloon dilation catheter according to claim 1 or 8 wherein the at least two balloons comprise a second balloon closest to the proximal end of the catheter body, the balloon dilation catheter further comprising a second hydrophilic coating disposed on the outer surface of the catheter body proximal to the proximal end of the second balloon.

10. The balloon dilation catheter of claim 1 wherein the balloon is a high pressure balloon.

11. A balloon dilation catheter according to claim 1, further comprising a plurality of visualization elements provided on the catheter body and provided respectively corresponding to both axial ends of each of the balloons.

12. The balloon dilation catheter according to claim 1 further comprising a drug coating applied to an outer surface of each said balloon.

13. The balloon dilation catheter of claim 1 wherein each said balloon includes five folding wings arranged along a circumference of said balloon.

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