CN117427260A

CN117427260A - Medical catheter and processing method thereof

Info

Publication number: CN117427260A
Application number: CN202311396062.4A
Authority: CN
Inventors: 蓝天宇; 聂京闽; 刘琛; 姚映忠; 赵瑞辉
Original assignee: Shanghai Microport Medical Group Co Ltd
Current assignee: Shanghai Minimally Invasive Medical Technology Co ltd
Priority date: 2023-10-25
Filing date: 2023-10-25
Publication date: 2024-01-23

Abstract

The invention provides a medical catheter and a processing method thereof, comprising a catheter body and a balloon body; the catheter body is provided with an instrument channel and a perfusion channel, and the instrument channel and the perfusion channel are separated by a partition wall; the device channel extends along the axial direction of the catheter body in a penetrating way, the proximal end of the perfusion channel is used for being connected with the joint component, the distal end of the perfusion channel is a closed end, and a perfusion hole for communicating the device channel and the perfusion channel is arranged on the partition wall; the balloon body is arranged in the instrument channel and covers the perfusion hole. The medical catheter can be used for PCI operation, and the filled balloon body is pressed against the guide wire to position the guide wire, so that the guide wire is prevented from shifting, the guide wire is not required to be positioned by additionally introducing the balloon catheter, the operation complexity is not increased, the operation time is prolonged, and the problem that the guide catheter does not have the condition of introducing the balloon catheter due to the vascular stenosis is avoided.

Description

Medical catheter and processing method thereof

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a medical catheter and a processing method thereof.

Background

Percutaneous perfusion arterial intervention (PCI) is mainly used for the treatment of obstructive coronary artery disease (CTO), which has been rapidly developed due to its advantages of micro-trauma, time saving, safety, high efficiency, etc.

With the increasing complexity of lesions, multiple interventional instruments are often required in one PCI procedure, and multiple interventional instruments are guided to the lesion through the same guide wire. During the process of exchanging different instruments into and out of the body, if the friction force between the guide wire and the instruments is large, the guide wire can shift, and the interventional instruments can not be guided to the lesion accurately. Once this occurs, this will result in an extended surgical time or reduced therapeutic effectiveness.

In practice, the guide wire may be positioned with the balloon in the anchoring balloon catheter as an anchoring device. However, this requires the additional introduction of the balloon catheter during the procedure, which increases the complexity of the procedure, itself, and increases the procedure time to some extent. Furthermore, in some stenosed vessels, the inner diameter of the guide tube through which the guide wire is inserted is small, and the condition for repositioning the balloon catheter is not provided, and in this case, the guide wire cannot be positioned using the balloon catheter.

Disclosure of Invention

The invention aims to provide a medical catheter and a processing method thereof, wherein the medical catheter has the dual functions of a guiding catheter and an anchoring balloon, and can position a guide wire penetrating through the medical catheter without additionally introducing an anchoring instrument, thereby reducing the complexity of operation, shortening the operation time and avoiding the problem that the instrument cannot be introduced to fix the guide wire due to vascular stenosis.

In order to achieve the above object, the present invention provides a medical catheter, comprising a catheter body and a balloon body; wherein, an instrument channel and a perfusion channel are formed on the catheter body, and the instrument channel and the perfusion channel are separated by a partition wall; the device channel extends in a penetrating manner along the axial direction of the catheter body, the proximal end of the perfusion channel is used for being connected with the joint assembly, the distal end of the perfusion channel is a closed end, and the partition wall is provided with a perfusion hole for communicating the device channel and the perfusion channel; the balloon body is arranged in the instrument channel and covers the perfusion hole.

Optionally, the number of the balloon body and the number of the perfusion holes are multiple, and the perfusion holes and the balloon bodies are arranged in one-to-one correspondence.

Optionally, a plurality of the balloon bodies are sequentially arranged along the circumferential direction of the instrument channel.

Optionally, the perfusion channel comprises a plurality of sub-perfusion channels and one junction channel; the plurality of sub-perfusion channels are arranged at intervals in the circumferential direction of the catheter body, each sub-perfusion channel extends along the axial direction of the catheter body, and the proximal end of one sub-perfusion channel is used for being connected with the joint assembly; the joint channel extends along the circumferential direction of the catheter body and is connected with a plurality of the sub-perfusion channels;

the region of the partition wall corresponding to each sub-perfusion channel is provided with a perfusion hole, and each perfusion hole is provided with a balloon body.

Optionally, a plurality of the balloon bodies are arranged at intervals along the axial direction of the catheter body;

the proximal end is used for connecting the distal end of the sub-perfusion channel connected with the joint assembly and the proximal ends of the rest of the sub-perfusion channels through the joint channel, the proximal end is used for being arranged corresponding to the sub-perfusion channel of the joint assembly and the balloon body at the most proximal end, and the distal ends of the rest of the sub-perfusion channels are closed; or,

the distal ends of the sub-infusion channels, the proximal ends of which are used to connect with the connector assembly, are connected with the distal ends of the remaining sub-infusion channels by the engagement channel, the proximal ends of the remaining sub-infusion channels being closed.

Optionally, the balloon at the distal-most end has a greater compliance than the balloon at its proximal side.

Optionally, the wall thickness of the balloon at the most distal end is smaller than the wall thickness of the balloon at its proximal side.

Optionally, a plurality of the balloon bodies are aligned with each other in an axial direction of the catheter body;

Optionally, a plurality of the balloon bodies are arranged at intervals along the axial direction of the catheter body, and the plurality of balloon bodies are aligned in the circumferential direction of the instrument channel.

Optionally, a patterned structure is formed on a surface of the balloon facing away from the perfusion channel.

To achieve the above object, the present invention also provides a processing method for producing the medical catheter according to any one of the foregoing, comprising:

providing a plurality of sub-tubes, wherein the plurality of sub-tubes can be spliced into the catheter body, and at least one sub-tube comprises the partition wall;

the pouring holes are formed in the partition walls;

arranging the balloon body at the perfusion hole; the method comprises the steps of,

and splicing all the sub-pipes.

Optionally, the cross section of each sub-pipe is a part of a circular ring, and the cross sections of all the sub-pipes can be spliced into the circular ring; alternatively, the sub-tubing is a cylindrical tube segment and the fill hole is adjacent an end of the sub-tubing.

Compared with the prior art, the medical catheter and the processing method thereof have the following advantages:

the medical catheter comprises a catheter body and a balloon body; wherein, an instrument channel and a perfusion channel are formed on the catheter body, and the instrument channel and the perfusion channel are separated by a partition wall; the device channel extends in a penetrating manner along the axial direction of the catheter body, the proximal end of the perfusion channel is used for being connected with the joint assembly, the distal end of the perfusion channel is a closed end, and the partition wall is provided with a perfusion hole for communicating the device channel and the perfusion channel; the balloon body is disposed within the instrument channel and covers the irrigation hole. When the balloon catheter is actually applied, the guide wire is partially penetrated in the instrument channel, and when filling agent is filled into the balloon body through the filling channel, so that the balloon body is filled, the filled balloon body can be pressed against the guide wire to position the guide wire, the guide wire is prevented from being shifted, and thus the guide wire is positioned without an additional guide balloon catheter, the operation complexity is not increased, the operation time is prolonged, and the problem that the guide catheter does not have the condition for guiding the balloon catheter due to vascular stenosis is avoided.

Drawings

The drawings are included to provide a better understanding of the invention and are not to be construed as unduly limiting the invention. Wherein:

fig. 1 is a schematic view of an application scenario of a medical catheter according to an embodiment of the present invention, in which only one balloon is shown and the balloon is not inflated;

fig. 2 is a schematic view of an application scenario of a medical catheter according to an embodiment of the present invention, in which only one balloon is shown and the balloon is inflated;

fig. 3 is a schematic view of an application scenario of a medical catheter according to an embodiment of the present invention, where two balloon bodies are shown, the two balloon bodies are arranged at intervals in an axial direction of the catheter body, and the two balloon bodies are sequentially arranged along a circumferential direction of an instrument channel;

FIG. 4 is a perspective view of the medical catheter of FIG. 3, showing primarily the infusion channel and not the balloon, with arrows indicating the flow of filling agent;

FIG. 5 is a partial cross-sectional view of the medical catheter shown in FIG. 3;

FIG. 6 is a partial cross-sectional view of the medical catheter shown in FIG. 3, the cross-sectional position of FIG. 4 being different from that of FIG. 3;

FIG. 7 is a perspective view of the medical catheter of FIG. 3, showing primarily the infusion channel and not the balloon, with arrows indicating the flow of filling agent, and with FIG. 7 differing from the specific configuration of the infusion channel of FIG. 3;

FIG. 8 is a schematic view of an application scenario of a medical catheter provided according to an embodiment of the present invention, showing two balloons arranged at intervals in an axial direction of the catheter body, aligned in a circumferential direction of an instrument channel;

FIG. 9 is a schematic view of an application scenario of a medical catheter according to an embodiment of the present invention, showing two balloons aligned in an axial direction of the catheter body and sequentially arranged along a circumferential direction of an instrument channel;

FIG. 10 is a cross-sectional view of a medical catheter according to an embodiment of the present invention, showing four balloons aligned in the axial direction of the catheter body and arranged in sequence along the circumference of the instrument channel;

fig. 11 is a schematic view of the outer surface of a balloon of a medical catheter according to an embodiment of the present invention.

Reference numerals are described as follows:

10-medical catheter, 100-catheter body, 101-infusion hole, 110-instrument channel, 120-infusion channel, 121-sub-infusion channel, 122-engagement channel, 130-septum wall, 200-balloon body, 201-pattern structure, 300-luer connector, 20-guidewire.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

In addition, each embodiment of the following description has one or more features, respectively, which does not mean that the inventor must implement all features of any embodiment at the same time, or that only some or all of the features of different embodiments can be implemented separately. In other words, those skilled in the art can implement some or all of the features of any one embodiment or a combination of some or all of the features of multiple embodiments selectively, depending on the design specifications or implementation requirements, thereby increasing the flexibility of the implementation of the invention where implemented as possible.

As used in this specification, the singular forms "a", "an" and "the" include plural 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, as for example, they may be fixed, they may be removable, or they may be integrally connected. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Relational terms such as first, second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, nor does it indicate or imply relative importance or number of technical features indicated. It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like, as indicated by the azimuth or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular azimuth, be configured and operated in a particular azimuth, and therefore should not be construed as limiting the invention. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The terms "distal" and "proximal" are described in terms of the relative positions, relative orientations of the elements, components, and the like of the medical device, and although not limited thereto, the "distal" is generally the end of the medical device that first enters the patient during normal use, and the "proximal" is the end opposite the "distal" that is closer to the operator than the "distal".

The invention will be further described in detail with reference to the accompanying drawings, in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. The same or similar reference numbers in the drawings refer to the same or similar parts.

Referring to fig. 1 to 10, a medical catheter 10 according to an embodiment of the present invention includes a catheter body 100 and a balloon body 200. The catheter body 100 has an instrument channel 110 and a perfusion channel 120 formed thereon, the instrument channel 110 and the perfusion channel 120 being separated by a partition 130. The instrument channel 110 extends through the catheter body 100 in the axial direction. The proximal end of the irrigation channel 120 is configured to connect to a connector assembly, and the distal end of the irrigation channel 120 is a closed end. The partition 130 has an irrigation hole 101 formed therein to communicate the instrument channel 110 and the irrigation channel 120. The balloon 200 is disposed within the instrument channel 110 and covers the irrigation hole 101.

The medical catheter 10 is applied to PC I surgery for the treatment of CTO. In operation, the instrument channel 110 is configured for threading the guidewire 20 therethrough and for passing an interventional instrument therethrough. The operator fills the balloon body 200 with an inflation agent through the filling channel 120 to inflate the balloon body 200, or withdraws the inflation agent to depressurize the balloon body 200. When the balloon body 200 is inflated, the balloon body 200 may press against the guide wire 20 to position the guide wire 20, so as to avoid displacement of the guide wire 20 due to large friction force between the guide wire and the interventional instrument. In other words, the medical catheter 10 integrates the conventional guiding catheter and the anchoring balloon catheter, and compared with the prior art, the problems of increased operation complexity and prolonged operation time caused by the additional introduction of the anchoring balloon catheter are avoided without additionally introducing the anchoring balloon catheter after the guiding catheter is introduced, and the problems of small tube diameter of the guiding catheter and no placement of the anchoring balloon catheter caused by the stenosis of the blood vessel are avoided.

In order to increase the interaction force between the balloon 200 and the guide wire 20 and further improve the positioning effect, it is preferable that a pattern structure 201 as shown in fig. 11 is formed on the surface of the balloon 200 facing the instrument channel 110. The specific shape of the pattern structure 201 is not particularly limited in the embodiment of the present invention, as long as it can increase the friction coefficient of the surface of the balloon body 200. The patterned structure 201 may be pressed by a die.

The balloon body 200 is made of an elastic film, for example, a thermoplastic polyurethane elastomer rubber film (TPU film). In some implementations, the balloon 200, when not inflated, has an inflation lumen (not labeled in the figures) for containing the inflation agent, which inflation lumen communicates with the inflation channel 120 through the inflation port 101. In other embodiments, balloon 200 assumes a smoothly curved configuration when not inflated, i.e., without an inflation lumen when balloon 200 is not inflated, but when inflation channel 120 is inflated with inflation agent, the inflation agent applies pressure to balloon 200 at inflation port 101 and causes balloon 200 to expand toward instrument channel 110, forming an inflation lumen on balloon 200 that contains the inflation agent.

It should also be noted that a coupling hole (not shown) communicating with the proximal end of the infusion channel 120 is formed in the proximal end of the catheter body 100 or the proximal side wall of the catheter body 100, so that the proximal end of the infusion channel 120 may be connected to the connector assembly, such as the luer connector 300, at the coupling hole, and may communicate with an external device through the connector assembly to infuse or aspirate the filling agent.

The number of the balloon bodies 200 according to the embodiment of the present invention is not particularly limited, and may be one (as shown in fig. 1 and 2), two (as shown in fig. 3, 8 and 9), three (not shown), four (as shown in fig. 10) or more (not shown). When the number of the balloon bodies 200 is two or more, the arrangement manner of the two or more balloon bodies is not particularly limited in the embodiment of the present invention, as long as the balloon bodies 200 can anchor the guide wire 20 and reduce the displacement of the guide wire 20 after filling.

It is understood that when the number of the balloon bodies 200 is plural, the number of the filling holes 101 is plural, and the plural filling holes 101 are arranged in one-to-one correspondence with the plural balloon bodies 200.

Next, a description will be given of possible configurations of the plurality of the balloon bodies 200 when the medical catheter 10 includes the plurality of balloon bodies 200 by way of example.

Fig. 3 illustrates a medical catheter 10 provided by an embodiment. Referring to fig. 3, in the present embodiment, the medical catheter 10 includes a plurality of the balloon bodies 200, for example, two. The plurality of balloon bodies 200 are arranged at intervals in the axial direction of the catheter body 100, and the plurality of balloon bodies 200 are also arranged in sequence in the circumferential direction of the instrument channel 110. Preferably, a plurality of the balloon bodies 200 are uniformly arranged in the circumferential direction of the instrument channel 100.

Corresponding to the arrangement of the plurality of balloon bodies 200, as shown in fig. 4 to 7, the perfusion channel 120 includes a plurality of sub-perfusion channels 121 and one joint channel 122. The plurality of sub-perfusion channels 121 are arranged at intervals along the circumferential direction of the catheter body 100, and specifically, the plurality of sub-perfusion channels 121 are arranged in a one-to-one correspondence with the plurality of balloon bodies 200 in the circumferential direction of the catheter body 100. A plurality of the sub-irrigation channels 121 each extend in an axial direction of the catheter body 100, with a proximal end of one of the sub-irrigation channels 121 extending to the engagement aperture for connection with the connector assembly. The engagement channels 122 extend in the circumferential direction of the catheter body 100, and the engagement channels 122 connect all of the sub-perfusion channels 121. The partition wall 130 is provided with one filling hole 101 corresponding to each region of the sub-filling channel 121, and it should be understood that the specific opening position of the filling hole 101 is matched with the corresponding setting position of the balloon body 200, so that when each balloon body 200 is set at the corresponding filling hole 101, each balloon body 200 may be filled under the action of the filling agent. The catheter body 100 is configured in such a manner that an operator can fill the filling agent into the filling channel 120 through one of the joint assemblies, so that a plurality of the balloon bodies 200 are filled, and the operation is simple and convenient.

The sub-infusion channel extending proximally from the junction hole is referred to as a first sub-infusion channel in this embodiment, and the remaining sub-infusion channels are referred to as second sub-infusion channels. In some implementations, the distal ends of the first sub-infusion channels are connected to the distal ends of all the second sub-infusion channels (as shown in fig. 4 and 5) by the junction channel 122, and the proximal ends of the second sub-infusion channels are closed. In these implementations, the first sub-perfusion channel may be disposed in correspondence with the balloon 200 on the proximal side or may be disposed in correspondence with the balloon 200 on the distal side. In other implementations, the distal ends of the first sub-infusion channels are connected to the proximal ends of all the second sub-infusion channels by the junction channel 122 (as shown in fig. 7), and the distal ends of the second sub-infusion channels are closed, and the first sub-infusion channels are disposed in correspondence with the balloon body 200 at the most proximal end.

Those skilled in the art will appreciate that in positioning the guidewire 20 that is threaded into the instrument channel 110, it is primarily the distal end of the guidewire 20 that is positioned, and that it is desirable that the position of the distal end of the guidewire 20 remain unchanged. Thus, in use, the medical catheter 10 provided in this embodiment desirably has the most distal one of the plurality of balloons 200 initially inflated and pressed against the guidewire 20 to anchor the distal end of the guidewire 20. This is because, when both the most distal balloon 200 (which may be referred to as a first balloon) and one of the balloons 200 adjacent thereto (which may be referred to as a second balloon) are inflated and pressed against the guidewire 20, the portion of the guidewire 20 between the first balloon and the second balloon will bend and form an S-shape, which necessarily results in proximal displacement of the distal end of the guidewire 20 when the first balloon is inflated, if the second balloon is inflated before the first balloon, the portion of the guidewire 20 pressed against by the second balloon is fixed first.

For the purpose of "one balloon body 200 located at the most distal end of the plurality of balloon bodies 200 is first inflated and pressed against the guide wire 20", the present embodiment adopts at least one of the following schemes (1) and (2). The scheme (1) includes controlling the compliance of the balloon 200 located at the most distal end to be greater than the compliance of the balloon 200 located at the proximal end side thereof. The scheme (2) includes controlling the wall thickness of the balloon body 200 located at the most distal end to be smaller than the wall thickness of the balloon body 200 located at the proximal end side thereof. The "compliance" refers to the degree of difficulty in deforming the balloon 200 by external force. The greater the compliance, the greater its deformability, which can cause greater deformation under the influence of a smaller external force.

Fig. 8 shows a medical catheter 10 provided by another embodiment. As shown in fig. 8, in the present embodiment, the number of the balloon bodies 200 is plural, for example, two, the plural balloon bodies 200 are arranged at intervals in the axial direction of the catheter body 100, and the plural balloon bodies 200 are aligned in the circumferential direction of the instrument channel 110. The filling order of the plurality of balloon bodies 200 is not particularly limited when the medical catheter 10 provided in the present embodiment is used.

Fig. 9 and 10 show a medical catheter 10 according to yet another embodiment. Referring to fig. 9 and 10, the medical catheter 10 according to the present embodiment includes a plurality of the balloons 200, for example, two, three, four or more. The plurality of balloon bodies 200 in this embodiment are aligned in the circumferential direction of the catheter body 100 and are sequentially arranged in the circumferential direction of the instrument channel 110. The medical catheter 10 is used to clamp the guide wire 20 together by a plurality of the balloon bodies 200.

The structure of the catheter body 100 of the present embodiment may refer to fig. 4 and 5, in other words, the perfusion channel 120 may include a plurality of sub-perfusion channels 121 and one joint channel 122, and the specific configuration of the plurality of sub-perfusion channels 121 and one joint channel 122 is referred to the above description, which is not repeated herein.

Further, the embodiment of the invention also provides a processing method of the medical catheter 10, which comprises the following steps:

a plurality of sub-tubing is provided, a plurality of the sub-tubing being capable of being spliced into the catheter body 100, and at least one of the sub-tubing comprising the spacer wall 130. It should be noted that, when the plurality of sub-pipes includes the partition wall 130, the whole of the sub-pipes formed by the partition wall 130 after the sub-pipes are spliced is still referred to as the partition wall 130.

The pouring hole 101 is formed in the partition 130.

The balloon 200 is disposed at the perfusion aperture 101.

And splicing all the sub-pipes. The adjacent two sub-pipes can be connected into a whole by welding or any other suitable mode.

In practice, all of the sub-tubing may be machined separately or, alternatively, the sub-tubing may be cut from a complete catheter body 100.

In some embodiments, the cross section of each of the sub-tubing is part of a circular ring, and the cross sections of all of the sub-tubing can be spliced into the circular ring. In these embodiments, the number of the sub-tubes is generally two, and each of the sub-tubes has a semicircular cross section. When the sub-tubing is cut from the catheter body 100, the cut surface passes through the axis of the catheter body 100.

When the medical catheter 10 is configured as shown in fig. 1, 2 and 4, only one of the sub-tubes includes the partition wall 130, and the other of the sub-tubes does not include the partition wall 130. When the catheter 10 has the configuration as in fig. 3, 9 and 10, both of the sub-tubes include the partition wall.

In other embodiments, each of the sub-tubing is a cylindrical tube segment. In these embodiments, the irrigation hole 101 is positioned adjacent to the end of the sub-tubing, so that it is easier to open the irrigation hole 101 and to position the balloon body 200. In addition, when the sub-tube is cut from the catheter body 100, the cut is perpendicular to the axis of the catheter body 100.

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, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A medical catheter, which is characterized by comprising a catheter body and a balloon body; wherein, an instrument channel and a perfusion channel are formed on the catheter body, and the instrument channel and the perfusion channel are separated by a partition wall; the device channel extends in a penetrating manner along the axial direction of the catheter body, the proximal end of the perfusion channel is used for being connected with the joint assembly, the distal end of the perfusion channel is a closed end, and the partition wall is provided with a perfusion hole for communicating the device channel and the perfusion channel; the balloon body is arranged in the instrument channel and covers the perfusion hole.

2. The medical catheter according to claim 1, wherein the number of the balloon bodies and the perfusion holes is plural, and the perfusion holes are arranged in one-to-one correspondence with the balloon bodies.

3. The medical catheter of claim 2, wherein a plurality of the balloon bodies are arranged in sequence along a circumferential direction of the instrument channel.

4. The medical catheter of claim 3, wherein the perfusion channel comprises a plurality of sub-perfusion channels and one junction channel; the plurality of sub-perfusion channels are arranged at intervals in the circumferential direction of the catheter body, each sub-perfusion channel extends along the axial direction of the catheter body, and the proximal end of one sub-perfusion channel is used for being connected with the joint assembly; the joint channel extends along the circumferential direction of the catheter body and is connected with a plurality of the sub-perfusion channels;

5. The medical catheter of claim 4, wherein a plurality of the balloon bodies are arranged at intervals along the axial direction of the catheter body;

6. The medical catheter of claim 5, wherein the balloon at the distal-most end has a greater compliance than the balloon at the proximal side thereof.

7. The medical catheter of claim 5 or 6, wherein the wall thickness of the balloon at the most distal end is smaller than the wall thickness of the balloon at the proximal side thereof.

8. The medical catheter of claim 4, wherein a plurality of the balloon bodies are aligned with each other in an axial direction of the catheter body;

9. The medical catheter of claim 2, wherein a plurality of the balloon bodies are spaced apart along the axial direction of the catheter body and are aligned circumferentially of the instrument channel.

10. The medical catheter of claim 1, wherein a patterned structure is formed on a surface of the balloon body facing away from the perfusion channel.

11. A method of processing for producing a medical catheter according to any one of claims 1-10, comprising:

the pouring holes are formed in the partition walls;

and splicing all the sub-pipes.

12. The method of claim 11, wherein the cross-section of each of the sub-tubing is a portion of a circle, and the cross-sections of all of the sub-tubing can be spliced into the circle; alternatively, the sub-tubing is a cylindrical tube segment and the fill hole is adjacent an end of the sub-tubing.