WO2023202465A1 - Medical catheter, device and system - Google Patents

Abstract

The invention provides a medical catheter, device and system. The medical catheter comprises a catheter body and an imaging probe; the catheter body is provided with an instrument channel passing therethrough and extending in the axial direction thereof, the imaging probe is arranged at the distal end of the catheter body and at least partially protrudes out of the face of the distal end of the catheter body, and the imaging probe is located on the outside of the instrument channel; along the axial projection of the medical catheter, the outer contour line of the projection of the imaging probe does not exceed the outer contour line of the projection of the catheter body. The medical catheter can be used in ERCP operations and can be passed through the duodenal papilla without the assistance of radioscopy. Further, owing to the small outer diameter of the distal end portion of the catheter, irritation or damage to the duodenal papilla is reduced.

Description

A medical catheter, device and system

Cross-references to related applications

This application requires that the application number is 202210424877.8, the application date is April 21, 2022, and the name is "A medical catheter, device and system". The application number is 202220939253.5, the application date is April 21, 2022, and the name is "A medical catheter, device and system". A medical catheter, device and system", the application number is 202211098156.9, the application date is September 8, 2022, the name is "a medical catheter, device and system" and the application number is 202222390295.0, the application date is September 8, 2022 , entitled "A Medical Catheter, Device and System," the contents of which are incorporated herein by reference in their entirety for all purposes.

Technical field

The present invention relates to the technical field of medical devices, and in particular to a medical catheter, device and system.

Background technique

Endoscopic retrograde cholangiopancreatography (ERCP) is a pancreatic and bile duct surgery that has been developed for many years. When performing ERCP surgery, the operator first passes the duodenoscope through the mouth, esophagus and stomach to the duodenal papilla, then inserts instruments through the instrument channel of the duodenoscope, and with the assistance of fluoroscopy, The instrument is passed through the duodenal papilla to the target lumen, which is the pancreatic duct or bile duct. Finally, contrast fluid is injected to observe the lesions inside the pancreatic duct or bile duct, and corresponding treatment is performed. The corresponding treatment includes placing a drainage tube. And stents, lithotripsy and stone removal, stricture dilation, etc.

In the process of bringing the medical catheter to the duodenal papilla, due to the various shapes of the duodenal papilla and the internal sphincter tend to contract when encountering mechanical stimulation, thereby covering the common segment of the bile duct and pancreatic duct, the application It is difficult for the surgeon to directly insert the device, and repeated insertion may cause inflammation or other complications. Therefore, in actual operation, the operator usually first inserts a guide wire through the instrument channel of the duodenoscope, then inserts it into the target lumen with the assistance of fluoroscopy, and finally inserts the instrument into the target lumen along the guide wire. During the process of inserting the guidewire, the operator usually obtains the bending angle of the guidewire relative to the duodenum through fluoroscopy. However, the internal structure of the duodenal papilla is easily blocked by the sphincter and cannot be seen clearly. In addition, The resistance caused by sphincter contraction increases, and the guidewire passes through the duodenal papilla and enters the target lumen. One operation becomes the difficulty of ERCP.

Contents of the invention

The object of the present invention is to provide a medical catheter, device and system, the distal end of which can be inserted into the duodenal papilla smoothly and reduce stimulation and damage to the duodenal papilla.

In order to achieve the above object, the present invention provides a medical catheter, which includes a catheter body and an imaging probe; the catheter body is provided with an instrument channel extending through the axial direction, and the imaging probe is disposed at the distal end of the catheter body. end, and at least partially protrudes from the distal end surface of the catheter body, the imaging probe is located outside the instrument channel; on the axial projection of the medical catheter, the projected outer contour of the imaging probe does not exceed the projected outer contour of the catheter body.

Optionally, the catheter body includes a first segment and a second segment, the second segment is connected to the distal end of the first segment, and the outer diameter of the second segment extends along the proximal end. It gradually decreases toward the distal end; the imaging probe is disposed at the distal end of the second section, and the outer diameter of the imaging probe is less than or equal to the minimum outer diameter of the second section.

Optionally, the distal section of the instrument channel is a beveled section, so that the outer diameter of the second section gradually decreases from the proximal end to the distal end.

Optionally, the axial distance between the point on the oblique section farthest from the distal end surface of the second segment and the distal end surface of the second segment is approximately 2 mm to 3 mm.

Optionally, at least part of the sidewalls of the instrument channel are configured to be elastic.

Optionally, at least part of the side wall of the instrument channel is made of elastic material.

Optionally, the imaging probe includes an imaging module and a transparent body. The imaging module is disposed in the distal end of the catheter body. The transparent body is disposed on the distal end surface of the catheter body and is in contact with the distal end of the catheter body. The catheter body seals the imaging module inside.

Optionally, the outer surface of the transparent body is part of a spherical surface.

Optionally, the catheter body is further provided with a liquid channel extending through the axial direction thereof, and the liquid channel is located outside the imaging probe.

Optionally, the liquid channel and the instrument channel are arranged symmetrically in the circumferential direction of the catheter body.

Optionally, the medical catheter further includes a pressure monitoring module, which is disposed at the distal end of the liquid channel.

Optionally, the medical catheter further includes a cable; the catheter body is also provided with a cable channel extending through its axial direction, the cable channel and the instrument channel are isolated from each other, and the cable channel The cable is passed through the cable channel; the imaging module is arranged in the cable channel, and the imaging module is connected to the cable.

Optionally, the medical catheter further includes a bend-controlling wire; the catheter body is also provided with a wire channel extending through its axial direction, and the wire channel and the instrument channel are isolated from each other. The bending control wire is passed through, and the distal end of the bending control wire is fixed to the catheter body.

In order to achieve the above object, the present invention also provides a medical device, which includes a handle and a medical catheter as described above, the handle is connected to the proximal end of the catheter body, and the handle is provided with a device connected to the instrument. Channel-connected import channels.

In order to achieve the above object, the present invention also provides a medical system, including an image processing device, an image display device and a medical catheter as mentioned above. The image processing device is communicatively connected with the imaging probe for receiving and processing For the image collected by the imaging probe, the image display device is communicatively connected with the image processing device and is used to display the image.

Optionally, the catheter body is also provided with a liquid channel extending through the axial direction thereof, and the liquid channel is located outside the imaging probe; the medical system further includes a negative pressure suction device, and the negative pressure A suction device is used to connect with the proximal end of the instrument channel.

Compared with the existing technology, the medical catheter, device and system of the present invention have the following advantages:

The aforementioned medical catheter includes a catheter body and an imaging probe. The catheter body is provided with an instrument channel extending through the axial direction. The imaging probe is disposed at the distal end of the catheter body and at least partially protrudes from the catheter body. The distal end face of the catheter body, the imaging probe is located outside the instrument channel, and on the axial projection of the medical catheter, the projected outer contour of the imaging probe does not exceed the projected outer contour of the catheter body. contour line. That is, the imaging probe has a smaller radial dimension. The medical catheter can be used to perform ERCP. Specifically, when the distal end of the duodenoscope reaches the duodenal papilla, the distal end of the medical catheter is introduced into the body along the instrument channel of the duodenoscope, and Insert the target lumen (pancreatic duct or bile duct) through the duodenal papilla, and finally insert the instrument into the target lumen along the instrument channel of the medical catheter, wherein the imaging probe extends out of the instrument channel of the duodenoscope. Afterwards, images of the inside of the duodenum can be taken and a direct view of the duodenal papilla is provided to facilitate guiding the distal end of the medical catheter through the duodenal papilla, and due to the relatively small outer diameter of the imaging probe Small, This enables the distal end of the medical catheter to be inserted into the duodenal papilla relatively smoothly and reduces stimulation and damage to the duodenal papilla.

Description of the drawings

The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation of the present invention. in:

Figure 1 is a schematic structural diagram of a medical catheter provided according to an embodiment of the present invention;

Figure 2 is a schematic structural diagram of a medical catheter provided according to an embodiment of the present invention. The viewing directions of Figure 2 are different from that of Figure 1;

Figure 3 is an A-A cross-sectional view of the medical catheter shown in Figure 1;

Figure 4 is a B-B cross-sectional view of the medical catheter shown in Figure 2;

Figure 5 is an axial projection schematic diagram of a medical catheter according to an embodiment of the present invention. In the illustration, the projected outer contour of the imaging probe is all located inside the projected outer contour of the catheter body;

Figure 6 is an axial projection schematic diagram of a medical catheter provided according to an embodiment of the present invention. In the illustration, the projected outer contour of the imaging probe partially coincides with the projected outer contour of the catheter body;

Figure 7 is a schematic structural diagram of a medical catheter provided by the present invention according to an alternative embodiment;

Figure 8 is a cross-sectional view of the medical catheter shown in Figure 7;

Figure 9 is a schematic structural diagram of a medical catheter provided according to an embodiment of the present invention. In the illustration, the side wall of the instrument channel is not deformed so that the instrument channel has a smaller inner diameter;

Figure 10 is a schematic structural diagram of a medical catheter provided according to an embodiment of the present invention. In the illustration, the side wall of the instrument channel is deformed so that the instrument channel has a larger inner diameter;

Figure 11 is a schematic structural diagram of a medical catheter provided according to another embodiment of the present invention. In the illustration, a liquid channel is provided on the catheter body, and the liquid channel is located above the instrument channel;

Figure 12 is a schematic structural diagram of a medical device provided according to an embodiment of the present invention.

[Reference symbols are explained as follows]:
10-Medical catheter, 100-Catheter body, 110-First segment, 120-Second segment, 121-Bevel section,
121a-proximal endpoint, 101-instrument channel, 102-cable channel, 103-liquid channel, 104-wire channel, 200-imaging probe, 210-imaging module, 220-transparent body, 300-cable, 400- Bending control cable, 20-handle.

Detailed ways

The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. The drawings only show the components related to the present invention and do not follow the actual implementation of the component numbers, shapes and components. Dimension drawing, in actual implementation, the type, quantity and proportion of each component can be arbitrarily changed, and the component layout type may also be more complex.

In addition, each embodiment described below has one or more technical features, but this does not mean that the inventor must implement all the technical features in any embodiment at the same time, or can only implement them in different embodiments separately. some or all of the technical features. In other words, on the premise that implementation is possible, those skilled in the art can selectively implement some or all of the technical features in any embodiment based on the disclosure of the present invention and design specifications or implementation requirements, or Selectively implement a combination of some or all of the technical features in multiple embodiments, thereby increasing the flexibility of the implementation of the present invention.

As used in this specification, the singular forms "a," "an," and "the" include plural referents, and the plural form "plurality" includes two or more referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally used in its sense including "and/or" unless the content clearly indicates otherwise, and the terms "installed", "connected" and "connected" shall To be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. The connection can be mechanical or electrical. It can be a direct connection or an indirect connection through an intermediary. It can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

As used herein, the terms "proximal" and "distal" refer to the relative orientation, relative position, direction of elements or actions relative to each other from the perspective of a physician using the medical device, although "proximal", "distal" ” is not meant to be limiting, but “proximal” generally refers to the end of the medical device that is closest to the physician during normal operation, while “distal” generally refers to the end that first enters the patient’s body.

In order to make the purpose, advantages and features of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use imprecise proportions, and are only used to conveniently and clearly assist in explaining the embodiments of the present invention. The same or similar reference numbers in the drawings represent the same or similar parts.

Referring to FIGS. 1 to 4 , a medical catheter 10 provided by an embodiment of the present invention includes a catheter body 100 and an imaging probe 200 . The catheter body 100 is provided with an instrument channel 101 extending through the axial direction of the catheter body 100 . The imaging probe 200 is disposed at the distal end of the catheter body 100 and at least partially protrudes from the distal end surface of the catheter body 100, and the imaging probe 200 is located outside the instrument channel 101, so that the The imaging probe 200 does not block the instrument channel 101. In the axial projection of the medical catheter 10 , the projected outer contour of the imaging probe 200 does not exceed the projected outer contour of the catheter body 100 . Here, the axial projection of the medical catheter 10 refers to the projection of the medical catheter 10 on a plane perpendicular to the axis of the medical catheter 10 . The projected outer contour of the imaging probe 200 does not exceed the projected outer contour of the catheter body 100 , including that the projection of the imaging probe 200 is completely inside the projection of the catheter body 100 as shown in FIG. 5 This situation also includes the situation where a part of the projected outer contour of the imaging probe 200 is located inside the projection of the catheter body 100 and the other part coincides with the projected outer contour of the catheter body 100 as shown in FIG. 6 Condition. That is to say, the outer diameter of the imaging probe 200 is smaller. Wherein, the outside of the instrument channel 101 refers to the outside in the radial direction.

The medical catheter 10 may be used to perform ERCP. Specifically, when the distal end of the duodenoscope reaches the duodenal papilla, the distal end of the medical catheter 10 is introduced into the body along the instrument channel of the duodenoscope, and inserted into the target through the duodenal papilla. lumen (pancreatic duct or bile duct), and finally the instrument is inserted into the target lumen along the instrument channel 101 of the medical catheter 10 . After extending out of the instrument channel of the duodenoscope, the imaging probe 200 can take images of the inside of the duodenum and provide a direct view of the duodenal papilla, so as to guide without the aid of fluoroscopy. The distal end of the medical catheter 10 passes through the duodenal papilla, and because the outer diameter of the imaging probe 200 is small, the distal end of the medical catheter 10 can be inserted into the duodenal papilla relatively smoothly, and Reduce irritation and damage to the duodenal papilla. The instruments described here include but are not limited to biopsy forceps. In addition, the instrument channel 101 is also used to thread guide wires, laser fibers, etc.

In this embodiment of the present invention, the imaging probe 200 includes an imaging module 210 and a transparent body 220 . The imaging module 210 is disposed in the distal end of the catheter body 100 . Please refer to FIGS. 3 and 5 . The catheter body 100 is also provided with a cable channel 102 extending through the axial direction of the catheter body 100 . The cable channel 102 and the instrument channel 101 are isolated from each other. The imaging module 210 is at least partially inserted into the cable channel 102 , and preferably the distal end of the imaging module 210 is flush with the distal end of the catheter body 100 . The transparent body 220 is disposed on the distal end surface of the catheter body 100 and seals the imaging module 210 together with the catheter body 100 . That is to say, the transparent body 220 extends away from the distal end of the catheter body 100 so that the distal end of the transparent body 220 exceeds the imaging module 210 . The transparent body 220 can be a cap structure to cover the imaging module 210 to achieve sealing of the imaging module 210, and can be used as the distal end of the catheter for contact with tissue. With such an imaging probe 200, even if the distal end of the medical catheter 10 abuts the tissue, the distal end of the transparent body 220 abuts the tissue, so that there is a certain gap between the imaging module 210 and the tissue. The distance ensures that the imaging module 210 can still perform normal imaging, allowing the operator to control the medical catheter to find and pass through the duodenal papilla. It can be understood that the transparent body 220 is made of a fully transparent or highly transparent material. In addition, the hardness of the material of the transparent body 220 is moderate. If the hardness is too small, it will bend when it contacts tissue, affecting imaging. If the hardness is too high, it will Easily cause damage to tissues.

Further preferably, the imaging probe 200 further includes a light source (not shown in the figure), the light source may also be disposed in the cable channel 102, and the distal end of the light source is in contact with the catheter body 100. The distal end surface of the imaging module 210 is flush with each other to provide illumination for the imaging module 210 . Preferably, as shown in Figures 1, 2 and 4, the outer surface of the transparent body 220 of the imaging probe 200 is part of a sphere, and the transparent body 220 is coaxial with the cable channel 102. The advantage of this arrangement is that the light provided by the light source can be concentrated at the center of the imaging module 210 as much as possible, thereby reducing imaging distortion caused by the varying refractive index of the transparent body 220 .

It can be understood that the medical catheter 10 may also include a cable 300 that is partially threaded in the cable channel 102 . The cable 300 may include a first cable and a second cable. The distal end of the first cable is electrically connected to the light source to transmit power provided by an external power source to the light source. The distal end of the second cable is connected to the imaging module 210 to transmit the power provided by an external power supply to the imaging module 210, and the proximal end of the second cable is also connected to an external image processing device (Fig. (not shown in ) connection to send the image information collected by the imaging module 210 to The image processing device.

Please refer to Figures 1, 2 and 4. In an exemplary embodiment, the catheter body 100 includes a first section 110 and a second section 120. The second section 120 is connected to the first section. The distal end of one segment 110 , so that the distal end of the second segment 120 is the distal end of the medical catheter 10 . The outer diameter of the second section 120 gradually decreases from the proximal end to the distal end, and the outer diameter of the imaging probe 200 is less than or equal to the minimum outer diameter of the second section 120 . The outer diameter of the second segment 120 may be continuously reduced along the direction from the proximal end to the distal end, or may be reduced stepwise along the direction from the proximal end to the distal end, which is not limited in this embodiment.

Optionally, in this embodiment, part of the side wall of the instrument channel 101 is removed, so that the distal end surface of the instrument channel 101 is a chamfered surface 121, so that the outer diameter of the second segment 120 is formed along the proximal surface. It decreases continuously from end to end. The advantage of this is that it facilitates the shaping of the catheter body 100 . Optionally, in the axial direction of the catheter body 100, the point on the bevel 121 that is farthest from the distal end surface of the second segment 120 is called the proximal end point 121a, and the proximal end The distance between the end point 121a and the distal end surface of the second segment 120 is approximately 2 mm to 3 mm.

In an alternative embodiment, please refer to FIGS. 7 and 8 , the distal portion of the catheter body 100 has a uniform outer diameter. As such, the outer diameter of the imaging probe 200 is smaller than the outer diameter of the distal portion of the catheter body 100 .

Further, at least part of the side walls of the instrument channel 101 is configured to be elastic, so that the instrument channel 101 has a smaller inner diameter when it is not subjected to radially outward pressure (as shown in Figure 9) , and when the instrument channel 101 is subjected to radially outward pressure, the elastic part of the side wall of the instrument channel 101 deforms to increase the inner diameter of the instrument channel 101 (as shown in Figure 10 ). The radially outward pressure may be provided by an instrument passed through the instrument channel 101 or by fluid passing through the instrument channel 101 . In other words, when no instrument is inserted into the instrument channel 101 or no fluid is introduced, the catheter body 100 has a smaller outer diameter and can pass through the human body lumen and duodenal papilla more easily. Here, to achieve this purpose, at least part of the side walls of the instrument channel 101 is made of elastic material.

The shape of the transparent body 220 can reduce the adhesion of body fluids and flocculent secretions on the transparent body 220 , thereby improving the integrity and clarity of image information collected by the imaging module 210 . Further, as shown in FIG. 11 , the catheter body 100 is also provided with an axis along the axial direction of the catheter body 100 . The liquid channel 103 extends through and is located outside the imaging probe 200 , that is, the liquid channel 103 is not blocked by the imaging probe 200 . The purpose of this arrangement is that even if liquid or other secretions adhere to the outer surface of the transparent body 220 , the flushing liquid can be poured through the liquid channel 103 to flush the transparent body 220 .

The flushing fluid includes but is not limited to physiological saline, and the flushing fluid can be discharged from the body through the instrument channel 101 . Specifically, in some implementations, the liquid channel 103 and the instrument channel 101 are symmetrically arranged in the circumferential direction of the catheter body 100, and during actual operation, the posture of the medical catheter body 100 is adjusted so that the The liquid channel 103 is located above the instrument channel 101 (the orientation shown in Figure 11). In this way, the flushing liquid can flow into the instrument channel 101 along the outer surface of the transparent body 220 under the action of gravity. Then it is discharged from the body through the instrument channel 101, and the flow direction of the flushing fluid is shown by arrow S in Figure 11. Alternatively, in other implementations, a negative pressure suction device (not shown in the figure) can be connected to the proximal end of the instrument channel 101 to suck the irrigation fluid into the instrument channel 101 through the action of negative pressure. , and then excreted from the body.

Further, when the irrigation fluid is sucked into the instrument channel 101 through negative pressure, the medical catheter 10 further includes a pressure monitoring module (not shown in the figure), and the pressure monitoring module can be disposed in the liquid channel. The far end of 103. During actual operation, the negative pressure suction device is first turned on. When the pressure monitoring module detects that the pressure at the far end of the liquid channel 103 reaches a predetermined value, the irrigation fluid can be poured into the liquid channel 103. The flushing liquid flushes the transparent body 220 under the guidance of negative pressure, and then flows through the instrument channel 101 and is discharged from the body. In this embodiment, the flushing liquid can be manually poured into the liquid channel 103 through a syringe, or the flushing liquid can be poured into the liquid channel 103 by controlling a liquid injection pump through an intelligent control module.

In addition, please refer back to FIG. 3 . The catheter body 100 is also provided with a wire channel 104 extending through the axial direction of the catheter body 100 . The wire channel 104 is connected with the instrument channel 101 and the liquid channel. 103 and the cable channel 102 are isolated from each other. The medical catheter 10 further includes a bend-controlling wire 400 , which is partially inserted into the wire channel 104 , and the distal end of the bending-controlling wire 400 is connected to the distal end of the catheter body 100 , the proximal end of the bending control wire 400 can pass through the proximal end of the catheter body 100, so that the operator can control the bending of the catheter body 100 by manipulating the bending control wire 400. It should be understood that the material of the catheter body 100 should have appropriate hardness and good resilience to facilitate bending. Optional materials include but are not limited to PTFE (polytetrafluoroethylene). ethylene). In addition, the proximal end of the bending control wire 400 can also be connected to a high-frequency electric generator, so as to be used as a nipple cutting knife when the electric power is supplied.

Further, as shown in Figure 12, the embodiment of the present invention also provides a medical device 1. The medical device 1 includes a handle 20 and the medical catheter 10 as mentioned above. The handle 20 and the medical catheter 10 The proximal end of the catheter body 100 is connected, and the handle 20 is provided with an introduction channel (not shown in the figure) that communicates with the instrument channel 101 . When performing an ERCP operation, various medical instruments enter the instrument channel 101 through the introduction channel, and when a negative pressure suction device is used to aspirate the irrigation fluid, the negative pressure suction device can also pass through the The introduction channel is connected with the instrument channel 101 .

Furthermore, embodiments of the present invention also provide a medical system, which includes an image processing device (not shown in the figure), an image display device (not shown in the figure), and the medical catheter as described above. 10. The image processing device is communicatively connected with the imaging probe 200 (specifically, the imaging module 210) for receiving and processing images collected by the imaging probe 200. The image display device and the image processing device communication connection and used to display the image.

In addition, when the liquid channel 103 is provided on the catheter body 100, the medical system further includes the negative pressure suction device.

Although the present invention is disclosed above, it is not limited thereto. Various changes and modifications can be made to the present invention by those skilled in the art without departing from the spirit and scope of the invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims (16)

1. A medical catheter, characterized in that it includes a catheter body and an imaging probe; the catheter body is provided with an instrument channel extending axially through; the imaging probe is disposed at the distal end of the catheter body and at least partially Protruding beyond the distal end face of the catheter body, the imaging probe is located outside the instrument channel; on the axial projection of the medical catheter, the projected outer contour of the imaging probe does not exceed the catheter The projected outer contour of the body.
2. The medical catheter according to claim 1, wherein the catheter body includes a first segment and a second segment, the second segment is connected to the distal end of the first segment, and the The outer diameter of the second segment gradually decreases from the proximal end to the distal end; the imaging probe is disposed at the distal end of the second segment, and the outer diameter of the imaging probe is less than or equal to the second segment. The minimum outer diameter of the segment.
3. The medical catheter according to claim 2, wherein the distal end surface of the instrument channel is a beveled surface, so that the outer diameter of the second section gradually decreases from the proximal end to the distal end.
4. The medical catheter according to claim 3, wherein the axial distance between the point on the oblique section farthest from the distal end surface of the second segment and the distal end surface of the second segment is about It is 2mm~3mm.
5. The medical catheter according to any one of claims 1-4, wherein at least part of the side wall of the instrument channel is configured to be elastic.
6. The medical catheter according to claim 5, wherein at least part of the side wall of the instrument channel is made of elastic material.
7. The medical catheter according to claim 1, wherein the imaging probe includes an imaging module and a transparent body, the imaging module is disposed in the distal end of the catheter body, and the transparent body is disposed in the The imaging module is sealed on the distal end surface of the catheter body and with the catheter body.
8. The medical catheter according to claim 7, wherein the outer surface of the transparent body is part of a spherical surface.
9. The medical catheter according to claim 7 or 8, characterized in that the catheter body is further provided with a liquid channel extending through the axial direction thereof, and the liquid channel is located outside the imaging probe.
10. The medical catheter according to claim 9, wherein the liquid channel and the The instrument channels are symmetrically arranged in the circumferential direction of the catheter body.
11. The medical catheter according to claim 9, characterized in that the medical catheter further includes a pressure monitoring module, and the pressure monitoring module is disposed at the distal end of the liquid channel.
12. The medical catheter according to claim 7, wherein the medical catheter further includes a cable; the catheter body is further provided with a cable channel extending through the axial direction thereof, and the cable channel is connected to the cable channel. The instrument channels are isolated from each other, and the cable is passed through the cable channel; the imaging module is arranged in the cable channel, and the imaging module is connected to the cable.
13. The medical catheter according to claim 1, characterized in that the medical catheter further includes a bending control wire; the catheter body is also provided with a wire channel extending through the axial direction thereof, and the wire channel is connected to the wire channel. The instrument channels are isolated from each other, the bending control wire is passed through the wire channel, and the distal end of the bending control wire is fixed to the catheter body.
14. A medical device, characterized in that it includes a handle and the medical catheter according to any one of claims 1 to 13, the handle is connected to the proximal end of the catheter body of the medical catheter, and the handle There is an introduction channel connected with the instrument channel on the catheter body.
15. A medical system, characterized by comprising an image processing device, an image display device and a medical catheter as claimed in any one of claims 1 to 13, the image processing device communicating with the imaging probe of the medical catheter Connection is used to receive and process images collected by the imaging probe. The image display device is communicatively connected with the image processing device and is used to display the image.
16. The medical system according to claim 15, wherein the catheter body of the medical catheter is further provided with a liquid channel extending through its axial direction, and the liquid channel is located outside the imaging probe; The medical system further includes a negative pressure suction device for connecting with the proximal end of the instrument channel on the catheter body.