CN212214357U - Multifunctional catheter - Google Patents

Abstract

A multi-functional catheter includes a catheter body and a distal tube of a multi-lumen tube structure. Wherein the distal tube comprises a soft end at the proximal end and a functional end at the distal end; a working cavity channel and a lens cavity channel are arranged in the catheter main body and the soft end, and a through hole communicated with the lens cavity channel is also arranged on the functional end; the lens cavity is a circular cavity structure extending along the catheter main body and the soft end; the inner wall of the lens cavity is provided with a plurality of accommodating grooves, so that the light sensing chip in the lens assembly is accommodated in the accommodating grooves. The utility model provides a space that the light sense chip was held in the formation of a plurality of holding grooves that the pipe can pass through in the camera lens chamber way can be at the prerequisite that does not increase camera lens chamber way diameter under the installation lens subassembly to reduce the whole diameter of pipe, in order to adapt to the biliary tract environment more complicated for the alimentary canal.

Description

Multifunctional catheter

Technical Field

The application relates to the technical field of medical equipment, in particular to a multifunctional catheter.

Background

In a minimally invasive surgery, a slender instrument is usually adopted to pass through a cavity channel in a patient body to reach a focus position for diagnosis and treatment, and since the minimally invasive surgery needs high accuracy and judgment, visualization is particularly important, the minimally invasive surgery needs to be assisted by means of slender endoscopic equipment or a catheter. The slender catheter needs to include liquid (gas) inlet and outlet channels, data transmission, illumination, direction deflection and other channels, and also needs to provide a working channel for the inlet and outlet of a diagnosis and treatment instrument, so that the outer diameter of the slender catheter is difficult to be smaller, and the diameter of the slender catheter is generally more than 5mm, which cannot be used for directly performing visual diagnosis and treatment operation on narrow channels such as bile ducts or pancreatic ducts.

Generally, when examining a small lumen such as a biliary tract or a pancreatic duct, a duodenoscope is inserted into the vicinity of a duodenal papilla through a digestive tract, a guide wire is inserted into a working lumen of the endoscope, various kinds of slender medical instruments are guided and inserted through the guide wire, and the conditions inside the lumen and the positions of the guide wire and the slender instruments are adjusted by means of X-rays. The duodenum endoscope can not enter the biliary tract and only stays outside the duodenal papilla, the intuitiveness of the operation mode is poor, and particularly when entering a biliary tract branch, the operation difficulty is high due to the complex biliary tract environment.

The choledochoscope reaches the duodenal papilla through a working channel of a conventional duodenoscope, then continues to enter the biliary tract, is equivalent to a sub-endoscope of the endoscope, has an outer diameter allowing the choledochoscope to pass through the working channel of the duodenoscope, and simultaneously has the working channel, liquid (gas) inlet and outlet, data transmission, illumination, direction deflection and other channels. The working cavity of the choledochoscope is 1.2mm, and diagnosis and treatment can be carried out only by an instrument with the diameter less than 1.1mm, while the outer diameter of the existing ERCP diagnosis and treatment catheter instrument is generally 1.8-2.5mm, so that the choledochoscope cannot be applied.

SUMMERY OF THE UTILITY MODEL

The application provides a multifunctional catheter, which solves the problem that the existing endoscope is not suitable for the biliary tract operation environment.

The present application provides a multifunctional catheter comprising: a catheter body of a multi-lumen tube structure and a distal tube connected to a distal end of the catheter body; wherein, the catheter main body and the distal end tube are internally provided with a working cavity channel; the end surface of the far end pipe is provided with a through hole communicated with the working cavity; the catheter main body and the far-end tube are also internally provided with a lens cavity, and the far-end surface of the far-end tube is provided with a through hole communicated with the lens cavity;

the lens cavity is a cavity structure extending along the catheter main body and the distal tube; the inner wall of the lens cavity is provided with a plurality of accommodating grooves, so that the light sensing chip in the lens assembly is accommodated in the accommodating grooves.

Optionally, the accommodating groove is a right-angled V-shaped groove; four accommodating grooves are formed in the lens cavity channel to form a rectangular space capable of accommodating the light sensing chip in the lens assembly.

Optionally, the rectangular space formed by the four accommodating grooves is coaxial with the lens cavity.

Optionally, the distal tube comprises a soft end and a functional end; the soft end is located at the proximal end of the distal tube and the functional end is located at the distal end of the distal tube.

Optionally, the end face of the through hole, through which the functional end communicates with the working cavity channel, is an inclined face.

Optionally, the diameter of the working channel is greater than or equal to 48% of the outer diameter of the soft end, and the diameter of the working channel is greater than or equal to 45% of the outer diameter of the catheter main body.

Optionally, a plurality of operation channels are further arranged in the catheter main body and the soft end; the functional end is provided with a plurality of connecting holes communicated with the operation cavity;

and each operation cavity is internally provided with an operation wire, and the distal end of each operation wire is fixed in the connecting hole of the operation cavity so as to pull the functional end through the plurality of operation wires and enable the distal end tube to be bent directionally.

Optionally, the catheter main body comprises a reinforcing layer, and the reinforcing layer is coated on the outer walls of the catheter main body and the soft end; the reinforcing layer is of a mesh grid tube structure and comprises a metal mesh grid positioned on the inner layer and a plastic substrate tube positioned on the outer layer.

Optionally, the multifunctional catheter further comprises a handle connected to the proximal end of the catheter main body, and a plurality of coaxial rotating members are arranged on the handle;

the rotating piece is connected with the proximal end of the manipulating wire so as to control the directional bending of the distal tube by drawing the manipulating wire through the rotating piece.

Optionally, a working cavity inlet is further formed in the handle, the working cavity inlet is a 6% standard luer connector, and the working cavity inlet is communicated with the working cavity.

Optionally, each of the rotating members is connected with two of the operating wires, and the winding directions of the two operating wires on the rotating shaft of the rotating member are opposite to each other, so as to generate a pulling force for controlling the directional bending of the distal end tube.

Optionally, the functional end is a cylindrical structure with an outer diameter equal to that of the soft end, and the hardness of the functional end is greater than that of the soft end.

Optionally, the outer diameter of the catheter body is less than or equal to 3.7 mm; the diameter of the working cavity is larger than or equal to 1.8 mm.

In view of the above, the present application provides a multifunctional catheter including a catheter main body of a multi-lumen tube structure and a distal tube. The catheter body and the far-end tube are internally provided with a working cavity channel and a lens cavity channel, and the far-end surface of the far-end tube is also provided with a through hole communicated with the lens cavity channel; the lens cavity is a cavity structure extending along the catheter main body and the soft end; the inner wall of the lens cavity is provided with a plurality of accommodating grooves, so that the light sensing chip in the lens assembly is accommodated in the accommodating grooves. The utility model provides a space that the light sense chip was held in the formation of a plurality of holding grooves that the pipe can pass through in the camera lens chamber says to can hold the camera lens subassembly under the prerequisite that does not increase camera lens chamber way diameter, reduce the whole diameter of pipe, in order to adapt to the biliary tract environment more complicated for the alimentary canal.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a multi-functional catheter according to the present application;

FIG. 2 is a schematic cross-sectional view of a catheter body according to the present application;

FIG. 3 is a schematic cross-sectional view of the soft end of the present application;

FIG. 4 is a perspective view of the handle of the present application;

FIG. 5 is a cross-sectional view of a functional terminal according to the present application;

FIG. 6 is a schematic perspective view of a functional end of the present application;

FIG. 7 is a cross-sectional structural view of another functional end of the present application;

illustration of the drawings:

wherein, 1-the catheter body; 11-a reinforcing layer; 2-a distal tube; 21-soft end; 22-functional end; 3-working cavity channel; 4-operating the cavity; 5-operating wires; 6-lens cavity; 61-accommodating groove; 7-a handle; 71-a rotating member; 72-working channel entrance; 8-liquid injection cavity.

Detailed Description

Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.

Referring to fig. 1, a schematic structural diagram of a multifunctional catheter according to the present application is shown. As can be seen from fig. 1 and 2, the present application provides a multifunctional catheter, which mainly includes: a catheter body 1 and a distal tube 2. Both the catheter body 1 and the distal tube 2 are multi-lumen tube structures. A distal tube 2 is attached to the distal end of the catheter body 1 as an extension of the distal end of the catheter body 1. In practice, the length of the catheter body 1 should be sufficient to satisfy the lesion position extending from outside the patient's body to the internal cavity of the patient; the distal tube 2 is of a length to meet the stroke requirements for maximum steering angle of the distal end of the catheter.

A working cavity channel 3 is arranged in the catheter main body 1 and the distal tube 2; the end surface of the far end pipe 2 is provided with a through hole communicated with the working cavity channel 3; still be equipped with camera lens chamber way 6 in catheter body 1 and the distal end pipe 2, be equipped with the through-hole of intercommunication camera lens chamber way 6 on the distal end terminal surface of distal end pipe 2.

Further, the distal tube 2 comprises a soft end 21 at the proximal end, and a functional end 22 at the distal end. The functional end 22 may be used to mount various endoscopic probe components, such as a camera, a light source, etc., and to connect a steering wire that drives the distal tube 2 to steer. The soft end 21 is used to connect the catheter body 1 and the functional end 22. In this embodiment, the hardness of the soft tip 21 is smaller than that of the catheter main body 1; the soft end 21 is more easily deformed relative to the catheter main body 1, so that the soft end can smoothly enter the body cavity of a patient under the guidance of the guide wire, the resistance of the catheter on the tissue wall of the cavity can be reduced, and the catheter is prevented from scratching the body tissue of the patient.

In the present application, the fact that the hardness of the soft tip 21 is lower than the hardness of the catheter main body 1 means that the soft tip 21 is more likely to deform with respect to the catheter main body 1, and is not a difference in hardness of the material itself. Therefore, in practical applications, the hardness of the soft tip 21 may be lower than that of the catheter main body 1, and may be realized by a different material or by an easily deformable structure. When the hardness difference is realized by different materials, the catheter main body 1 can be made of hard materials, such as: plastic materials such as Polytetrafluoroethylene (PTFE), Polyamide (PA), polyether block amide (Pebax), and the like; the soft end 21 can be made of soft material, such as Polytetrafluoroethylene (PTFE), Polyamide (PA), silicone rubber, Polyurethane (PU), and polyether block amide (Pebax), which have low hardening and tempering hardness. When the difference in hardness is realized by the easily deformable structure, it is possible to realize the hardness by providing the soft end 21 in a corrugated structure, a thin tube structure, a multi-cavity structure, or the like, which is easily deformable.

In the technical scheme provided by the application, as shown in fig. 3, a working cavity channel 3 is arranged in the catheter main body 1 and the soft end 21; the functional end 22 is provided with a through hole communicated with the working cavity channel 3. The working cavity channel 3 can be used for inserting auxiliary instruments for further diagnosis and treatment in practical application, such as biopsy forceps, laser lithotripsy instruments and the like, and can also be used for delivering medicaments and the like through the working cavity channel 3 and flushing the cavity channel and delivering liquid in the cavity channel to the outside of the body. In order to facilitate the operation of the auxiliary instrument, the diameter of the working cavity channel 3 is greater than or equal to 48% of the outer diameter of the soft end 21, and the diameter of the working cavity channel 3 is greater than or equal to 45% of the outer diameter of the catheter main body 1.

In practice, it is clear that the larger the diameter of the working channel 3, the more space is available for the operation, and therefore the more advantageous it is to carry out the operation. However, the diameter of the catheter main body 1 and the soft tip 21 cannot be made large due to the restriction of the body lumen, and therefore the diameter of the working lumen 3 cannot be made large. Taking the bile duct and the pancreatic duct as an example, the outer diameter of the catheter main body 1 is less than or equal to 3.7mm under the influence of the inner diameters of the bile duct and the pancreatic duct, namely the diameter design of the working duct 3 is limited by the parameter.

Furthermore, the end face of the through hole of the functional end 22 communicated with the working cavity 3 is an inclined plane, and the inclined plane can reduce the resistance of the catheter in the digestive tract during running, so that the catheter can reach the position of a patient conveniently. For example, as shown in fig. 5 and 6, the inclined surface may be inclined at an angle of 45 °. Obviously, the end face of the through hole communicating with the working cavity 3 can also be formed by splicing a plurality of faces with different inclination angles, as shown in fig. 7, the end face of the functional end 22, which transits from the position of the lens cavity 6 to the working cavity 3, can be formed by two inclined planes, so that the end face shape gradually tends to be sharp from gentle to sharp, and the digestive tract can be conveniently entered.

In the technical scheme provided by the application, as shown in fig. 2, 5 and 6, a lens cavity 6 is further arranged in the catheter main body 1 and the soft end 21, and a through hole communicated with the lens cavity 6 is further arranged on the functional end 22. The end face of the through hole on the functional end 22 may be provided with a lens assembly so as to collect images of the environment in the alimentary canal, and the inside of the lens canal 6 may be used for setting wire components such as a data line of the lens assembly so as to transmit the image data collected by the lens assembly to a display device for displaying.

The lens assembly generally includes a lens and a light sensing chip. The image in the alimentary canal reaches the photosensitive chip through the refraction of the lens to generate an image signal. Because the volume of the lens assembly is limited by the shape of the photosensitive chip, namely the photosensitive chip cannot be too small, the resolution of the acquired image is prevented from being too low. And the lens in the lens subassembly can be many shapes, but the photosensitive chip can only be made into the rectangle structure, leads to the accommodation space that the lens subassembly needs to be great.

Therefore, in the present application, the lens channel 6 is a circular lumen structure extending along the catheter main body 1 and the soft end 21. The inner wall of the lens cavity 6 is provided with a plurality of accommodating grooves 61, so that the light sensing chip in the lens assembly is accommodated in the accommodating grooves 61. In practical application, the plurality of accommodating grooves 61 can form a rectangular space for accommodating the photosensitive chip, so that the shape of the photosensitive chip is adapted, and the diameter of the circular tube cavity of the lens cavity 6 is reduced.

In order to form a rectangular structure, the accommodating groove 61 is a right-angled V-shaped groove. Four accommodating grooves 61 are arranged in the lens cavity 6 to form a rectangular space capable of accommodating the light sensing chip in the lens assembly. For example, the 4 accommodating grooves 61 are rectangular V-shaped grooves, forming a rectangular accommodating space of 1.12 × 1.12mm, and can accommodate a maximum of 1.12 × 1.12mm of optical sensor chips, and at this time, the diameter of the circular tube cavity of the lens cavity 6 is 1.36mm or less. If the accommodating groove 61 is not used, a circular tube with a diameter of 1.7mm or more is required to accommodate the 1.12 × 1.12mm light-sensitive chip. It can be seen that a plurality of accommodating grooves 61 in the lens cavity 6 form a space for accommodating the light sensing chip, and the lens assembly can be installed on the premise of not increasing the diameter of the lens cavity 6, so that the overall diameter of the catheter is reduced.

Furthermore, the rectangular space formed by the four accommodating grooves 61 is coaxial with the lens cavity 6, so that the central position of the light sensing chip can be limited to the central position of the lens cavity 6 on the basis of accommodating the light sensing chip of the lens assembly, and the lens assembly is convenient to mount and fix.

In this embodiment, the lens assembly may acquire the image of the lumen in real time and transmit the image to the display device at the proximal end of the catheter through the data line, so as to display the advancing condition of the catheter in the lumen and the action condition of the surgical instrument in the actual surgical operation.

In the present application, the distal end of the catheter is controlled to realize steering action, which can be guided by a guide wire in the endoscope, but when the distal end of the catheter runs into a bile duct which cannot be reached by the endoscope, the distal end of the catheter needs to be controlled to steer by a steering wire 5, that is, in some embodiments provided in the present application, a plurality of steering channels 4 are further arranged in the catheter main body 1 and the soft end 21; the functional end 22 is provided with a plurality of connecting holes communicated with the operation cavity 4; each operation cavity channel 4 is provided with an operation wire 5, and the distal end of each operation wire 5 is fixed in the connecting hole of the operation cavity channel 4, so that the functional end 22 is pulled by the operation wires 5 to enable the distal end tube 2 to be bent directionally.

In practice, one end of the wire 5 is connected to the functional end 22, and the other end extends from the distal end of the catheter to the proximal end, so that the wire 5 can pull the functional end 22 to generate a tendency to move by pulling the wire 5 at the proximal end of the catheter, thereby forming a serpentine curve in the distal tube 2. Obviously, the number of the operating wires 5 which can satisfy the operation needs to be at least two, and in order to realize more flexible steering operation, the number of the operating wires 5 and the operating cavities 4 can be increased appropriately.

In order to meet the requirement of fixing the distal end of the operating wire 5 in this embodiment, the functional end 22 may be made of metal or plastic, and is connected to the operating wire 5 by welding or insert molding, so that the distal end of the operating wire 5 is fixedly connected to the functional end 22, and the distal end tube 2 is controlled to perform steering by adjusting the length of the operating wire 5. The diameter of the operating wire 5 is less than 0.35mm, and a strong and wear-resistant metal wire or plastic fiber can be selected.

As can be seen from the above technical solutions, as shown in fig. 5, in order to realize consecutive cavities, the catheter body 1 in the present application, the soft end 21 and the functional end 22 have the same cavity arrangement, for example, the catheter body 1 is provided with one working cavity 3, four operating cavities 4 and one lens cavity 6. The deflection function of four different directions can be met, the process is simple, and a large amount of space is saved. And the functions of steering, working cavity, liquid injection and suction, optical vision and the like can be realized at the same time, the outer diameter of the device is reduced to be less than 3.7mm, and the device can meet the use requirements of most ERCP instruments, namely the visualized diagnosis and treatment requirements of bile ducts and pancreatic ducts.

In some embodiments of the present application, the catheter main body 1 includes a reinforcing layer 11, and the reinforcing layer 11 is coated on the outer walls of the catheter main body 1, the soft end 21 and the functional end 22. On one hand, the reinforcing layer 11 can enhance the rigidity of the whole catheter, so that the catheter can be conveniently conveyed to the internal cavity of a patient; on the other hand, the catheter main body 1, the soft end 21 and the functional end 22 can be communicated through the reinforcing layer 11, so that the catheter main body 1 and the distal end tube 2 can still be connected into a whole when not adopting the same material or an integrated structure, and the deformation of a cavity and a catheter caused by using a connecting agent is avoided.

Further, the reinforcing layer 11 is a mesh-woven tube structure, and comprises a metal mesh-woven at the inner layer and a plastic substrate tube at the outer layer. The single side of the wall thickness of the reinforcing layer 11 is at least 0.1mm to maintain sufficient connection strength, so that the inner solid diameter is less than 3.5mm when the outer diameter of the catheter main body 1 is less than or equal to 3.7 mm. With respect to the current extrusion technology and material characteristics, the effective limit wall thickness of the catheter main body 1 and the soft end 21 (for example, using PEBAX, silica gel, etc.) is 0.1mm, so the diameter space for multi-lumen design inside is less than 3.3mm, and the diameter of the working lumen can be more than 1.8mm, that is, the diameter of the working lumen 3 is greater than or equal to 1.8 mm.

In some embodiments of the present application, as shown in fig. 4, the multifunctional catheter further comprises a handle 7 connected to the proximal end of the catheter main body 1, wherein a plurality of rotating members 71 are coaxially arranged on the handle 7; the rotary member 71 is connected to the proximal end of the manipulation wire 5 to pull the manipulation wire 5 by the rotary member 71 to control the directional bending of the distal tube 2. Wherein, two operating wires 5 are connected to each rotating member 71, and the winding directions of the two operating wires 5 on the rotating shaft of the rotating member 71 are opposite, so as to generate a pulling force for controlling the directional bending of the distal tube 2. Further, a working cavity inlet 72 is further formed in the handle 7, the working cavity inlet 72 is a 6% standard luer connector, and the working cavity inlet 72 is communicated with the working cavity 3.

In this embodiment, the proximal end of the catheter body 1 includes a handle 7, the handle 7 includes a pair of coaxial rotating members 71, i.e., rotating wheels, each of which is connected to two steering wires 5 on both sides of its rotating shaft, and when the multifunctional catheter is used alone or in cooperation with a duodenoscope to reach a target lumen, a doctor holds the handle 7 with one hand or hangs the handle 7 near the working lumen of another endoscope (e.g., a duodenoscope) in cooperation with the multifunctional catheter.

When one of the rotating wheels rotates clockwise, the two symmetrical operating wires 5 connected with the rotating wheel relatively move in the operating cavity 4 in the catheter main body 1 and the distal tube 2 and respectively generate a force for pulling and pushing in opposite directions, so that the functional end 22 connected with the rotating wheel inclines, and the soft end 21 in the distal tube 2 is compressed, so that the distal tube 2 bends towards a preset direction. When the wheel is rotated counterclockwise, the distal tube 2 will bend in the other direction. Similarly, when the other rotating wheel rotates clockwise and counterclockwise, the distal tube 2 is driven to bend in other directions.

In this embodiment, the physician controls the direction of entry of the distal tube 2 into the patient and into the lumen of the mating endoscope, as well as the direction of viewing, by rotating the rotatable member 71 on the rotatable handle 7, while the depth of entry and exit of the distal tube 2 into and out of the lumen can be controlled by pushing on the handle 7 at the proximal end of the catheter body 1. In addition, the proximal end of the handle 7 is provided with a working cavity inlet 72 with a 6% standard luer connector, the working cavity inlet 72 is connected with the working cavity 3, a doctor can insert auxiliary instruments such as biopsy forceps and a laser lithotripter through the working cavity inlet 72 for further diagnosis and treatment, and can inject liquid through the working cavity inlet 72 to flush the cavity and wash out the liquid in the cavity out of the body.

In some embodiments provided herein, the functional end 22 is a cylindrical structure with an outer diameter equal to the soft end 21, and the hardness of the functional end 22 is greater than that of the soft end 21. In practical applications, the functional end 22 may be made of a rigid plastic or stainless steel material and has a cylindrical structure with through holes corresponding to multiple channels of the flexible end 21. The functional end 22 can be pre-opened with a plurality of holes for installation, such as a camera hole, a hole for fixing the operation wire 5, a medicament hole or an injection hole for communicating the injection cavity 8, etc. through a hard material. Therefore, the hardness of the functional end 22 is greater than that of the soft end 21, so that various mounting components can be conveniently fixed, and the whole working process is more stable. In addition, the functional end 22 with higher hardness is selected, so that the processing and the hole forming are facilitated, and the process precision is improved.

In view of the above, the present application provides a multifunctional catheter comprising a catheter main body 1 and a distal tube 2 of a multi-lumen structure. Wherein the distal tube 2 comprises a soft end 21 at the proximal end and a functional end 22 at the distal end; the hardness of the soft end 21 is less than that of the catheter main body 1; working cavity channels are arranged in the catheter main body 1 and the soft end 21; the functional end 22 is provided with a through hole communicated with the working cavity channel 3; the diameter of the working cavity channel 3 is more than or equal to 51 percent of the outer diameter of the soft end 21, and the diameter of the working cavity channel 3 is more than or equal to 49 percent of the outer diameter of the catheter main body 1. The utility model provides a soft end 21 cooperation work chamber 3 that the pipe can pass through distal end pipe 2 realizes turning to the function and makes the distal end of pipe can adapt to the biliary tract environment more complicated for the alimentary canal.

Meanwhile, the lens cavity 6 is a circular cavity structure extending along the catheter main body 1 and the soft end 31; the inner wall of the lens cavity 6 is provided with a plurality of accommodating grooves 61, so that the plurality of accommodating grooves 61 accommodate the light sensing chip in the lens assembly. The utility model provides a catheter can hold the space that the groove 61 formed and hold the light sense chip through a plurality of holding in the camera lens chamber way 6 to can hold the camera lens subassembly under the prerequisite that does not increase camera lens chamber way 6 diameters, reduce the whole diameter of catheter, in order to adapt to the biliary tract environment more complicated for the alimentary canal.

In addition, the multifunctional catheter provided by the application has the advantages that the working cavity can pass through a 1.8mm conventional instrument, the multifunctional catheter is convenient for a doctor to use, the manufacturing cost is saved, the price of the instrument used in a matched mode is reduced, and the burden of a patient is further reduced.

The embodiments provided in the present application are only a few examples of the general concept of the present application, and do not limit the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.

Claims (10)

1. A multi-functional catheter, comprising:

the catheter main body (1) is of a multi-lumen tube structure;

the distal end pipe (2) is a multi-lumen pipe structure and is connected to the distal end of the catheter main body (1);

wherein, a working cavity channel (3) is arranged in the catheter main body (1) and the distal tube (2); the end surface of the far end pipe (2) is provided with a through hole communicated with the working cavity channel (3); a lens cavity (6) is arranged in the catheter main body (1) and the far-end tube (2), and a through hole communicated with the lens cavity (6) is arranged on the far-end surface of the far-end tube (2);

the lens cavity (6) is a cavity structure extending along the catheter main body (1) and the distal tube (2); the inner wall of the lens cavity (6) is provided with a plurality of accommodating grooves (61) so as to accommodate the light sensing chip in the lens assembly through the accommodating grooves (61).

2. The multifunctional catheter according to claim 1, characterized in that said housing groove (61) is a right-angled V-shaped groove; four accommodating grooves (61) are arranged in the lens cavity (6) to form a rectangular space capable of accommodating a light sensing chip in the lens assembly.

3. The multifunctional catheter according to claim 2, characterized in that the rectangular space formed by the four accommodating grooves (61) is coaxial with the lens channel (6).

4. A multifunctional catheter as claimed in claim 1, characterized in that said distal tube (2) comprises a soft end (21) and a functional end (22); the soft end (21) is located at the proximal end of the distal tube (2) and the functional end (22) is located at the distal end of the distal tube (2).

5. The multifunctional catheter according to claim 4, characterized in that the end surface of the through hole of the functional end (22) communicated with the working channel (3) is an inclined surface.

6. The multifunctional catheter according to claim 4, characterized in that said working channel (3) has a diameter greater than or equal to 48% of the outer diameter of said soft end (21) and said working channel (3) has a diameter greater than or equal to 45% of the outer diameter of said catheter body (1).

7. The multifunctional catheter as claimed in claim 4, characterized in that a plurality of operating channels (4) are further provided in the catheter body (1) and the soft end (21); the functional end (22) is provided with a plurality of connecting holes communicated with the operation cavity (4);

each operation cavity (4) is internally provided with an operation wire (5), and the distal end of each operation wire (5) is fixed in the connecting hole of the operation cavity (4) so as to pull the functional end (22) through the plurality of operation wires (5) to directionally bend the distal end tube (2).

8. The multifunctional catheter according to claim 4, wherein the catheter body (1) comprises a reinforcing layer (11), the reinforcing layer (11) being coated on the outer wall of the catheter body (1) and the soft tip (21); the reinforcing layer (11) is of a mesh-woven structure and comprises a metal mesh-woven net positioned on an inner layer and a plastic substrate pipe positioned on an outer layer.

9. Multifunctional catheter according to claim 4, characterized in that the functional end (22) is of cylindrical configuration with an outer diameter equal to the soft end (21), the hardness of the functional end (22) being greater than the hardness of the soft end (21).

10. Multifunctional catheter according to claim 1, characterized in that the outer diameter of the catheter body (1) is less than or equal to 3.7 mm; the diameter of the working cavity (3) is larger than or equal to 1.8 mm.

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