WO2022205771A1

WO2022205771A1 - Medical catheter

Info

Publication number: WO2022205771A1
Application number: PCT/CN2021/116894
Authority: WO
Inventors: 刘弘毅; 吴昊晟
Original assignee: 常州朗合医疗器械有限公司
Priority date: 2021-03-31
Filing date: 2021-09-07
Publication date: 2022-10-06
Also published as: CN114377279A

Abstract

A medical catheter, comprising a flexible tube (10) and a bending control structure (20). The bending control structure (20) is disposed on the outer wall of the flexible tube (10), and comprises sleeves (210) and bending control steel wires (220) freely moving in the sleeves (210); the sleeves (210) are disposed on the outer wall of the flexible tube (10) along the length direction of the flexible tube (10); first ends (2201) of the bending control steel wires (220) are connected to the outer wall of a first end (101) of the flexible tube (10), and second ends (2202) of the bending control steel wires (220) are disposed outside a second end (102) of the flexible tube (10) through the sleeves (210). The control structure for the rotation and advance and retreat of the medical catheter is simplified, the flexibility of the medical catheter when moving in the body of a patient is improved, and the comfort of the patient during a diagnosis and treatment process is enhanced.

Description

medical catheter

cross reference

This application refers to Chinese Patent Application No. 202110349434.2 filed on March 31, 2021, entitled “Medical Catheter”, which is fully incorporated into this application by reference.

technical field

The invention relates to the field of medical technology, in particular to a medical catheter.

Background technique

Among modern medical devices, interventional medical catheters are very important devices in medical diagnosis and surgical procedures such as cardiology, neurology, urology and nephrology.

The interventional medicine catheter is mainly sent into the patient's body through the natural airway through the control mechanism, and its rotation and advance and retreat are controlled under the cooperative support of the imaging technology to reach the lesion area of the patient's body for further diagnosis and treatment. However, the rotation control of the current interventional medicine catheter is relatively complicated, which makes it less flexible when moving in the patient's body, which leads to a long stay in the patient's body during the diagnosis and treatment process, which makes the patient feel comfortable during the diagnosis and treatment process. Poor performance, affecting the patient's experience.

SUMMARY OF THE INVENTION

In view of this, the embodiment of the present invention provides a medical catheter, which simplifies the control structure of its rotation advance and retreat, improves its flexibility when moving in the patient's body, and enhances the patient's comfort during diagnosis and treatment.

The medical system provided by the embodiment of the present invention includes a flexible tube and a bending control structure,

The bending control structure is arranged on the outer wall of the hose, and includes a sleeve and a bending control wire that moves freely in the sleeve;

The sleeve is arranged on the outer wall of the hose along the length direction of the hose, the first end of the bending control wire is connected to the outer wall of the first end of the hose, and the bending control wire is The second end is positioned outside the second end of the hose through the sleeve.

Further, the first end of the hose is provided with a fixing ring, and the first end of the bending control wire is fixed on the fixing ring.

Further, it also includes a braided mesh, the braided mesh is tubular, is arranged on the outside of the sleeve, and wraps the sleeve and the hose therein.

Further, a plurality of the sleeves are arranged on the outer wall of the hose, and the plurality of sleeves are distributed at equal intervals along the circumference of the outer wall of the hose.

Further, four sleeves are arranged on the outer wall of the hose, and two adjacent sleeves are arranged at 90 degrees on the outer wall of the hose.

Further, it also includes an outer tube, the outer tube is arranged on the outer circumference of the hose, and the sleeve and the braided mesh are embedded in the tube wall of the outer tube.

Further, the fixing ring is arranged on the outer wall of the first end of the hose.

Further, the fixing ring includes a plug portion and an external part, the plug part is plugged on the inner wall of the first end of the hose, and the external part is externally placed on the first end of the hose outside.

Further, an end of the external part away from the first end of the hose is provided with a working channel for placing a medical tool, and the working channel communicates with the hose.

Further, the end of the external part away from the first end of the hose is further provided with an image slot for placing a camera and at least one lighting slot for placing a lighting unit.

Further, the external part is made of transparent material, and the lighting slot is enclosed in the external part.

Further, it also includes a sliding structure, the sliding structure includes a slider base and a steel wire slider;

The slider base is connected to the end of the outer tube away from the first end of the hose, and the slider base is provided with a chute along the length direction for the steel wire slider to slide back and forth. The second end of the bending control wire passes through the outer tube and is connected to the wire slider.

Further, a catheter fixing seat is also included, and the catheter fixing seat is provided on the outer circumference of the outer tube between the passing point of the second end of the bending control wire and the slider base.

In the embodiment of the present invention, by arranging a sleeve on the outer wall of the medical hose, disposing a freely movable bending control wire in the sleeve, and fixing the first end of the bending control wire to the first end of the hose, The second end of the bend-controlling wire is placed outside the second end of the hose, and the second end of the bend-controlling wire is pulled to bend the first end of the hose toward the bend-controlling wire, so that the advancing direction of the medical catheter is within the patient's body Rotation occurs rapidly, simplifying the control structure of the medical catheter, improving its flexibility when moving in the patient's body, and enhancing the comfort of the patient during diagnosis and treatment.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a schematic three-dimensional structure diagram of a medical catheter according to an embodiment of the present invention;

2 is a schematic cross-sectional structure diagram of a medical catheter provided by an embodiment of the present invention;

3 is another three-dimensional schematic diagram of a medical catheter provided by an embodiment of the present invention;

4 is a schematic exploded schematic diagram of a three-dimensional structure of a medical catheter provided by an embodiment of the present invention;

5 is another three-dimensional schematic diagram of a medical catheter provided by an embodiment of the present invention;

6 is another schematic cross-sectional structure diagram of a medical catheter provided by an embodiment of the present invention;

7 is another three-dimensional schematic diagram of a medical catheter provided by an embodiment of the present invention;

FIG. 8 is a schematic three-dimensional structural diagram of a sliding structure of a medical catheter according to an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

specific embodiment

Please refer to FIG. 1 , which is a schematic three-dimensional structure diagram of a medical catheter according to an embodiment of the present invention. The medical catheter includes a flexible tube 10 and a bending control structure 20 , and the bending control structure 20 is disposed on the side of the flexible tube 10 . The outer wall includes a sleeve 210 and a bending control wire 220 freely moving in the sleeve 210; the sleeve 210 is arranged on the outer wall of the hose 10 along the length of the hose 10, and the control The first end 2201 of the bending wire 220 is connected to the outer wall of the first end 101 of the hose 10 , and the second end 2202 of the bending control wire 220 is placed on the first end of the hose 10 through the sleeve 210 . Outside the two ends 102.

Specifically, please refer to FIG. 2 , which is a schematic cross-sectional structure diagram of a medical catheter provided by an embodiment of the present invention. The flexible tube 10 is the innermost structure of the medical catheter, and the manufacturing material of the flexible tube 10 includes: However, it is not limited to polytetrafluoroethylene (PTFE). In a preferred embodiment, the hose 10 is a PTFE tube with a thin wall. The length of the hose 10 is not further limited here. It is considered to be an indeterminate length structure and can be freely customized according to actual use needs.

The bend control structure 20 is provided on the outer circumference of the hose 10 and is arranged along the outer wall of the hose 10. The number of the bend control structure 20 here is at least one. When the structures 20 are bent, the bend control structures 20 are arranged at equal intervals along the circumference of the outer wall of the hose 10 to enclose the hose 10 therein.

Specifically, each of the bending control structures 20 includes the sleeve 210 and the bending control wire 220 . Here, the sleeves 210 are provided on the hose 10 along the length direction of the hose 10 . On the outer wall of the hose 10, the sleeve 210 can be understood as the interlayer on the outer wall of the hose 10, that is, the sleeve 210 and the hose 10 are integral structures, and the sleeve 210 and the soft The tube 10 may be integrally formed, and the specific forming method includes, but is not limited to, integral injection molding, or a tube extrusion process. Each of the sleeves 210 is provided with a bending control wire 220. Here, the bending control wire 220 passes through the sleeve 210, and the two ends are respectively located outside the sleeve 210. The first end 2201 of the bending control wire 220 is connected to the outer wall of the first end 101 of the hose 10, and the second end 2202 of the bending control wire 220 passes through the sleeve 210. The sleeve 210 is strung out of the other end of the sleeve 210 and placed outside the second end 102 of the hose 10 .

The bending control wire 220 can move freely in the casing 210 , and the second end 2202 of the bending control wire 220 can be pulled forcibly during use, that is, the bending control wire 220 can be placed in the casing 210 . It can move freely inside. Since the first end 2201 of the bending control wire 220 is fixed on the outer wall of the first end 101 of the hose 10, when the second end 2202 of the bending control wire 220 is pulled hard, the The bending control wire 220 will not come out of the sleeve 210, and the first end 101 of the hose 10 will bend in the direction of the pulled bending control wire 220 due to the pulling force, that is, the The leading end of the medical catheter pair is rotated.

It should be pointed out here that when the number of the bending control structures 20 provided on the outer wall of the hose 10 is less than 3, due to its poor rigidity, when a local force is applied, its bending direction is difficult to control. When it is necessary to provide a structure for enhancing the rigidity of the bending control structure 20 to control the rotation and bending direction of the front end of the medical catheter, the structure for enhancing the rigidity of the medical catheter here includes, but is not limited to, the A metal mesh is provided on the periphery of the sleeve 210 .

In addition, when the number of the bending control structures 20 provided on the outer wall of the hose 10 is not less than 3, three or more of the bending control wires 220 can provide better rigidity for the medical catheter, even if the local When subjected to force, its bending direction is also easier to control. At this time, there is no need to provide additional structures on the outer circumference of the bending control structure 20 for enhancing its rigidity. Providing a structure for enhancing its rigidity can further improve the rigidity of the medical catheter, which is beneficial to accurately control the rotation and bending direction of the front end of the medical catheter. Similarly, the structure for enhancing the rigidity of the medical catheter here includes but not The definition is that a metal mesh is arranged on the periphery of the sleeve 210

Furthermore, in order to ensure that the bending control structure 20 can move freely in the sleeve 210, the manufacturing material of the sleeve 210 includes but is not limited to low-friction polymer materials such as PTFE and PP, and the control The bending steel wire 220 is preferably a single-strand high-strength steel wire, and of course, a twist-like structure woven from a plurality of steel wires is not excluded; in other preferred embodiments of the present invention, it can be set in the sleeve 210 Corresponding lubricant can reduce the frictional force of the bending control wire 220 when the bending control wire 220 moves freely in the sleeve 210 and improve the operation efficiency of the bending control structure 20 .

Secondly, it should be noted that the above-mentioned force for pulling the second end 2202 of the bending control wire 220 may be the manual pulling force of medical staff during the diagnosis and treatment process, or may be the mechanical pulling force of an industrial robot such as a robotic arm.

In the above embodiments of the present invention, the sleeve 210 is disposed on the outer wall of the hose 10, and the bending control wire that can move freely relative to the sleeve 210 is disposed in the sleeve 210 220, and the first end 2201 of the bending control wire 220 is fixed on the first end 101 of the hose 10, and the second end 2201 of the bending control wire 220 is placed on the first end 101 of the hose 10. Outside the two ends 102, by pulling the second end 2202 of the bending control wire 220, the first end 101 of the hose 10 is bent toward the pulled bending control wire 220, so that the medical catheter advances The direction bends and rotates rapidly in the patient's body, which simplifies the control structure of the traditional medical catheter, improves the flexibility of the medical catheter when moving in the patient's body, reduces the work and residence time of the medical catheter in the patient's body, and enhances the patient's diagnosis and treatment process. of comfort.

Further, please refer to FIG. 3 , which is another three-dimensional schematic diagram of a medical catheter provided by the embodiment of the present invention. One end 2201 is fixed on the fixing ring 30 .

Specifically, the manufacturing material of the fixing ring 30 includes but is not limited to metal, and the first end 2201 of the bending control wire 220 is fixed to the fixing ring 30 by welding, laser welding, etc. The fixing function of the bending control wire 220, so that when the second end 2202 of the bending control wire 220 is pulled forcibly, the bending control wire 220 will not come out of the sleeve 210, and can drive the hose The first end 101 of the 10 is bent in the direction of the pulled bending control wire 220 .

Further, in one possible implementation manner of the embodiment of the present invention, the fixing ring 30 is provided on the outer wall of the first end 101 of the hose 10 .

Specifically, the fixing ring 30 is sleeved on the outer wall of the hose 10 and is located near the first end 101 of the hose 10 . Here, the inner wall of the fixing ring 30 and the hose are In addition to the socket connection between the outer walls of the 10, the connection can also be strengthened by means of bonding, etc., to ensure that the fixing ring 30 and the hose 10 are relatively fixed, so as to facilitate the pulling of the bending control wire 220. When the second end 2202 is pulled, the first end 101 of the hose 10 can be driven to bend in the direction of the pulled bending control wire 220 .

In addition, referring to FIG. 4 , in another feasible implementation manner of the embodiment of the present invention, the fixing ring 30 includes a plug-in part 310 and an external part 320 , and the plug-in part 310 is plugged into the soft Inside the inner wall of the first end 101 of the tube 10 , the outer portion 320 is placed outside the first end 101 of the hose 10 .

Specifically, the plug-in part 310 and the external part 320 are connected, and are generally integrally formed. The diameter of the plug-in part 310 is smaller than the diameter of the external part 320. The plug part 310 is used to be inserted into the inner wall of the first end 101 of the hose 10 to realize the fixing of the fixing ring 30 and the hose 10 . In a preferred embodiment, the plug part 310 The outer periphery of the hose 10 and the inner wall of the first end 101 of the hose 10 can also be bonded by adhesive to enhance the fixing strength between the fixing ring 30 and the hose 10. The outer part 320 is located at Outside the first end 101 of the hose 10, and the diameter of the external part 320 may be larger than the diameter of the hose 10, or slightly smaller than the diameter of the hose 10, here It does not strictly limit its specific size relationship.

Under such a structure, the first end 2201 of the bending control wire 220 may be fixedly connected to the plug-in portion 310 , or may be fixedly connected to the external portion 320 .

In addition, in order to facilitate the smooth running of the first end 101 of the hose 10 in the patient's body, the end of the external part 320 away from the plug-in part 310 is generally smoothed, that is, the front end is designed to be slightly pointed Alien structure.

Further, in one implementation manner of the present invention, the end of the external part 320 away from the first end 101 of the hose 10 is provided with a working channel 3201 for placing medical tools, and the working channel 3201 communicated with the hose 10 .

Here, the fixing ring 30 is provided with the working channel 3201, and the working channel 3201 and the hose 10 communicate with each other, and are used for placing medical tools for diagnosis and treatment of patients; The port through 3201 is located at the end of the external part 320 away from the first end 101 of the hose 10, that is, the medical tool enters through the second end 102 of the hose 10, along the entire length of the The hose 10 reaches the first end 101 of the hose 10 , and passes through the inserting part 310 and the outer part 320 of the fixing ring 30 , and the working part of the end of the outer part 320 works The channel 3201 is extended for diagnosis and treatment of the patient's lesion at the front end of the catheter.

Further, in another implementation manner of the present invention, the end of the external part 320 away from the first end 101 of the hose 10 is further provided with an image slot 3202 for placing a camera and at least one image slot 3202 for placing a camera. The lighting slot 3203 where the lighting unit is placed.

Specifically, one image slot 3202 and at least one illumination slot 3203 are distributed on the outer periphery of the port of the working channel 3201 .

Here, a camera is provided in the image slot 3202 for real-time image acquisition of the front end of the catheter. The camera includes but is not limited to a wide-angle camera, which can capture a large range of the front end of the catheter. And includes CMOS photosensitive element, lens, drive circuit and other parts, which can be separate from each other or integrated on a module, the camera transmits the video signal to the video processing of the external device through the (shielded) wire (and the connector). in the circuit.

The lighting slot 3203 is provided with an LED lamp, and the LED lamp is connected to the LED lamp driving circuit of the external device through a wire (and a connector), and the driving circuit of the LED lamp can be dimming by DC voltage regulation or PWM dimming. Here, The number of the LED lights is 1-4 or more, and the number of the LED lights can be set according to the area of the end of the external part 320 away from the first end 101 of the hose 10 , or It is set according to the actual diagnosis and treatment site needs.

In addition, the external part 320 is made of transparent material, and the lighting slot 3203 is enclosed in the external part 320 .

The external part 320 made of transparent material can be made of transparent plastic using an injection molding process, and is inserted into the hose 10 through the plug-in part 310 to be bonded to it, so as to ensure the enclosed part of the outer part 320 The light of the LED lights in the lighting groove 3203 can be transmitted to the front end of the catheter, and under the premise of ensuring the lighting requirements, the body fluid of the patient can be prevented from entering the lighting groove 3203 during the travel of the catheter in the patient, and the lighting can be improved. effect, improve lighting safety, and ensure that the diagnosis and treatment of patient lesions can be carried out quickly and accurately.

Here, it should be pointed out that only the illumination slot 3203 is closed, and the image slot 3202 does not need related processing.

In addition, in other preferred embodiments of the present invention, the external part 320 is made of metal material, the hose 10 is inserted into the hose 10 through the plug-in part 310, and fixed by bonding or crimping, while the The lighting slot 3203 and the image slot 3202 are respectively disposed at the end of the external part 320 , and the LED light is installed in the lighting slot 3203 and is flush with the end surface after installation.

Further, please refer to FIG. 5 , which is another three-dimensional schematic diagram of a medical catheter provided by an embodiment of the present invention. The medical catheter further includes a braided mesh 230 , and the braided mesh 230 is tubular and is arranged on the sleeve. 210 and wrap the sleeve 210 and the hose 10 therein.

Specifically, the braided mesh 230 includes but is not limited to being braided by metal wires, such as steel wire braided into a tubular shape, and sleeved on the outside of the sleeve 210 to connect the sleeve 210 and the hose 10 is wrapped in it, the braided mesh 230 has good rigidity and is arranged on the periphery of the medical catheter, which can effectively prevent the medical catheter from being squeezed and deformed, and can also prevent the sleeve 210 from being squeezed. In this way, the friction force of the bending control wire 220 when moving in the sleeve 210 is avoided to be increased, the smoothness of the bending control wire 220 when moving is improved, and the rotation of the first end 101 of the hose 10 is increased. Flexibility; in addition, the braided mesh 230 can also provide good torque transmission performance, on the one hand can further improve the flexibility of the rotation of the first end 101 of the hose 10, on the other hand can also improve the hose The controllability of the first end 101 of the hose 10 when it is rotated under force makes the rotation of the first end 101 of the hose 10 more accurate, and improves the bending control accuracy of the medical catheter.

Here, the ends of the braided mesh 230 close to the first end 101 of the hose 10 are respectively fixedly connected to the fixing ring 30, and the specific fixing connection method can be the same as the bending control wire 220 and the fixing The form of fixed connection between the rings 30 is consistent, for example, including but not limited to the form of fixed connection through metal welding and laser welding.

In addition, please refer to FIG. 6 , which is another schematic cross-sectional structure diagram of a medical catheter provided by an embodiment of the present invention. The outer wall of the hose 10 is provided with a plurality of the sleeves 210 , and a plurality of the sleeves 210 They are distributed at equal intervals along the outer wall of the hose 10 .

Here, the outer circumference of the hose 10 is provided with a plurality of the bending control structures 20, that is, a plurality of the sleeves 210 are arranged on the outer wall of the hose 10, wherein the multiple sleeves 210 are arranged along the The outer walls of the pipe section of the hose 10 are arranged at equal intervals around the circumference.

In the above embodiment, by arranging a plurality of bending control structures 20, and then by pulling the bending control wires 220 of different bending control structures 20, the end of the hose 10 can be bent in different directions. The rotation direction of the end of the flexible tube 10 is enriched, and the applicable scope of the medical catheter is improved.

Further, in other preferred embodiments of the present invention, as shown in the figures, four sleeves 210 are provided on the outer wall of the hose 10, and two adjacent sleeves 210 are located in the soft The outer wall of the tube 10 is arranged at 90 degrees.

Specifically, four of the sleeves 210 are equally spaced around the outer wall of the tube section of the hose 10 , and two adjacent sleeves 210 are at 90 degrees on the outer wall of the hose 10 The angle setting means that the outer circumference of the hose 10 is provided with four of the bending control structures 20 . In this way, by pulling the bending control wires 220 of the bending control structure 20 at different positions in the front, rear, left and right positions, the end of the hose 10 can be bent in different directions in the front, rear, left and right directions; The bending control wires 220 of the two adjacent bending control structures 20 further change the rotation direction of the end of the hose 10, so that the rotation direction of the end of the hose 10 is more abundant, and further The scope of application of the medical catheter is improved.

In addition, in other embodiments of the present invention, the medical catheter further includes an outer tube 40, the outer tube 40 is provided on the outer circumference of the hose 10, and the sleeve 210 and the braided mesh 230 are embedded in the outer tube 40. inside the tube wall of the outer tube 40 .

Specifically, the outer tube 40 is wrapped around the outer circumference of the hose 10, and the outer wall of the outer tube 40 is in direct contact with the patient's body. Here, the outer tube 40 can be made by a catheter extrusion process , can also be made by nano-injection process, the sleeve 210 on the outer wall of the hose 10 and the braided mesh 230 around the sleeve 210 are embedded in the wall of the outer tube 40, That is, the gap outside the hose 10 is filled with the material for making the outer pipe 40 , and the material for making the outer pipe 40 includes, but is not limited to, PEBAX or other polymer materials.

In addition, referring to FIG. 7 and FIG. 8, the medical catheter further includes a sliding structure 50, and the sliding structure 50 includes a slider base 510 and a wire slider 520; the slider base 510 is connected to the outer tube 40 The end of the first end 101 away from the hose 10, the slider base 510 is provided with a chute 5101 along the length direction for the wire slider 520 to slide back and forth, and the first end of the bending control wire 220 is The two ends 2202 pass through the outer tube 40 and are connected to the steel wire slider 520 .

Specifically, the end of the outer tube 40 away from the first end 101 of the hose 10 is connected to the slider base 510, and the two may be connected by plugging, welding or integral molding, and the slider base The shape of 510 includes but is not limited to cylindrical or prismatic structure, and its outer diameter is generally larger than the outer diameter of the outer tube 40, and the chute 5101 is provided along the length of the The block 520 can slide back and forth in the chute 5101, and the end of the steel wire slider 520 toward the first end 101 of the hose 10 is connected to the bending control wire 220. Specifically, the bending control wire The second end 2202 of the 220 penetrates the surface of the outer tube 40 and is connected to the steel wire slider 520. When the steel wire slider 520 slides in the chute 5101, the bending control wire 220 will The head section of the hose 10 is driven to bend and deform. For example, when the bending control wire 220 is pulled, the head section of the hose 10 will bend in the direction of the pulled bending control wire 220, so that the medical The leading end of the catheter rotates.

Further, the medical catheter further includes a catheter fixing seat 60 , and the catheter fixing seat 60 is provided at a point between the passing point of the second end 2201 of the bending control wire 220 and the slider base 510 . the outer circumference of the outer tube 40 .

Specifically, the conduit fixing seat 60 is in the shape of a trumpet, the larger end faces the end of the slider base 510 , and the smaller end faces the passing point of the second end 2201 of the bending control wire 220 . It is sleeved on the outer circumference of the outer tube 40, the bending control wire 220 passes through the outer wall of the outer tube 40, and is connected to the steel wire slider 520 through the outer wall of the catheter fixing seat 60. Here The catheter fixing seat 60 serves as a transition for the bending control wire 220 , so that the bending control wire 220 can move back and forth uniformly.

In other preferred embodiments of the present invention, the surface of the catheter fixing base 60 is provided with a wire groove for the positioning of the bending control wires 220 , so that a plurality of the bending control wires 220 are arranged on the outer tube 40 In all directions, the head section of the hose 10 can be rotated in multiple directions.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device that includes the element.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The above descriptions are merely embodiments of the present invention, and are not intended to limit the present invention. Various modifications and variations of the present invention are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

A medical catheter is characterized in that it comprises a flexible tube and a bending control structure,

The bending control structure is arranged on the outer wall of the hose, and includes a sleeve and a bending control wire that moves freely in the sleeve;

The sleeve is arranged on the outer wall of the hose along the length direction of the hose, the first end of the bending control wire is connected to the outer wall of the first end of the hose, and the bending control wire is The second end is positioned outside the second end of the hose through the sleeve.
The medical catheter according to claim 1, wherein the first end of the flexible tube is provided with a fixing ring, and the first end of the bending control wire is fixed on the fixing ring.
The medical catheter according to claim 1, further comprising a braided mesh, wherein the braided mesh is tubular, and is arranged outside the sleeve, and wraps the sleeve and the flexible tube therein.
The medical catheter according to claim 1, wherein a plurality of the sleeves are arranged on the outer wall of the flexible tube, and the multiple sleeves are distributed at equal intervals along the circumference of the outer wall of the flexible tube.
The medical catheter according to claim 4, wherein four sleeves are provided on the outer wall of the hose, and two adjacent sleeves are arranged at 90 degrees on the outer wall of the hose.
The medical catheter according to claim 3, further comprising an outer tube, the outer tube is provided on the outer circumference of the flexible tube, and the sleeve and the braided mesh are embedded in the tube wall of the outer tube Inside.
The medical catheter according to claim 2, wherein the fixing ring is provided on the outer wall of the first end of the flexible tube.
The medical catheter according to claim 2, wherein the fixing ring comprises a plug portion and an external part, the plug part is plugged on the inner wall of the first end of the hose, and the external part The outer portion is external to the first end of the hose.
The medical catheter according to claim 8, wherein the end of the external part away from the first end of the hose is provided with a working channel for placing a medical tool, and the working channel is connected to the flexible tube. Connected.
The medical catheter according to claim 9, wherein the end of the external part away from the first end of the hose is further provided with an image slot for placing a camera and at least one illumination for placing an illumination unit groove.
The medical catheter according to claim 10, wherein the external part is made of a transparent material, and the lighting groove is enclosed in the external part.
The medical catheter according to claim 6, further comprising a sliding structure comprising a slider base and a steel wire slider;

The slider base is connected to the end of the outer tube away from the first end of the hose, and the slider base is provided with a chute along the length direction for the steel wire slider to slide back and forth. The second end of the bending control wire passes through the outer tube and is connected to the wire slider.
The medical catheter according to claim 12, further comprising a catheter fixing seat, wherein the catheter fixing seat is provided at a point between the passing point of the second end of the bending control wire and the sliding block base. the outer periphery of the outer tube.