CN117339083A - Medical catheter - Google Patents

Abstract

The embodiment of the invention discloses a medical catheter, which comprises a bending control catheter and a pressure detector, wherein the bending control catheter comprises a hose, a sleeve and a bending control steel wire, the sleeve is arranged on the outer wall of the hose along the length direction of the hose, the bending control steel wire is arranged in the sleeve and can freely move, the pressure detector is connected to the first end of the hose and is used for detecting the pressure of the first end of the hose when the bending control catheter moves in a cavity of a patient, the first end of the bending control steel wire is connected to the pressure detector, and the second end of the bending control steel wire passes through the sleeve and is arranged outside the second end of the hose. The medical catheter provided by the embodiment of the invention can detect the pressure of the first end of the medical hose when the first end of the medical hose advances in the cavity of a patient, so that the expected external collision between the catheter and the wall of the cavity is avoided in time, and the safety and the reliability of interventional operation are improved.

Description

Medical catheter

Technical Field

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

Background

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

The interventional medical catheter is mainly delivered into the body of a patient through a natural cavity channel by a control mechanism, and the rotation and the advance and retreat of the interventional medical catheter are controlled under the cooperation support of medical imaging technology so as to reach the focus area of the body of the patient, so that further diagnosis and treatment are performed. Based on some abnormal structures of natural cavity, a pre-bent or bending control catheter is usually adopted, so that the catheter can finish the operation of adjusting the direction and selecting a proper path for pushing in the cavity, but the risk in the operation is brought. If the catheter head end collides with the cavity wall in the operation process, a larger collision force is generated, the situation that the cavity wall is damaged or even broken is likely to happen, and particularly, the intervention complications such as bleeding and the like are caused in the cavity with fragile walls such as bronchus, blood vessels and the like. The existing medical catheter does not have a head end force detection function, and the expected external collision between the catheter and the wall of the cavity cannot be avoided in time, so that the safety and reliability of the interventional operation cannot be guaranteed.

Disclosure of Invention

The medical catheter provided by the embodiment of the invention can enable the head end of the catheter to have a force detection function, so that the expected external collision between the catheter and the wall of the cavity can be avoided in time, and the safety and reliability of interventional operation can be improved.

The medical catheter provided by the embodiment of the invention comprises:

the bending control catheter comprises a hose, a sleeve and a bending control steel wire, wherein the sleeve is arranged on the outer wall of the hose along the length direction of the hose, and the bending control steel wire is arranged in the sleeve and can move freely;

a pressure detector connected to the first end of the hose for detecting the pressure of the first end of the hose as the bend control catheter travels within the patient's lumen;

wherein, the first end of accuse curved steel wire is connected on the pressure detector, the second end of accuse curved steel wire passes the sleeve pipe is arranged in outside the second end of hose.

Further, the pressure detector comprises an elastic ring, a reflecting mirror and a ranging sensor;

the reflecting mirror and the distance measuring sensor are arranged in the elastic ring at intervals, the reflecting surface of the reflecting mirror faces the sensing surface of the distance measuring sensor, one surface of the distance measuring sensor, which faces away from the reflecting mirror, is connected with the first end of the hose, and the first end of the bending control steel wire is connected with the end part of the elastic ring.

Further, the novel hose sleeve comprises a woven mesh, wherein the woven mesh is tubular, is arranged outside the sleeve, and wraps the sleeve and the hose.

Further, the outer wall of the hose is provided with a plurality of sleeves, and the sleeves are distributed at equal intervals along the circumference of the outer wall of the hose.

Further, 4 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, the flexible pipe further comprises an outer pipe, the outer pipe is arranged on the periphery of the flexible pipe, and the sleeve and the woven mesh are inlaid in the pipe wall of the outer pipe.

Further, one end of the outer tube is sleeved on the elastic ring.

Further, the catheter comprises a catheter head end which is sleeved on the inner wall of the outer tube.

Further, the catheter head end comprises an inserting part and an external part, wherein the inserting part is inserted into the inner wall of the outer tube, and the external part is externally arranged at the end part of the outer tube.

Further, a working channel for placing medical tools is arranged at the end part of the external part, and the working channel is communicated with the hose.

Further, an image groove for placing a camera and at least one illumination groove for placing an illumination unit are arranged on the periphery of the working channel.

Further, the external portion is made of transparent materials, and the illumination groove is enclosed in the external portion.

Further, the sliding structure comprises a sliding block base and a steel wire sliding block;

the sliding block base is connected to the end part of the outer tube, which is far away from the first end of the hose, a sliding groove for the steel wire sliding block to slide back and forth is formed in the sliding block base along the length direction, and the second end of the bending control steel wire penetrates out of the outer tube and is connected with the steel wire sliding block.

Further, the device also comprises a catheter fixing seat, wherein the catheter fixing seat is arranged at the periphery of the outer tube between the penetrating point of the second end of the bending control steel wire and the slider base.

In the embodiment of the invention, the sleeve is arranged on the outer wall of the medical hose, the bending control steel wire capable of freely moving is arranged in the sleeve, the first end of the bending control steel wire is fixed at the first end of the hose, the second end of the bending control steel wire is arranged outside the second end of the hose, the second end of the bending control steel wire is pulled to enable the first end of the hose to bend towards the bending control steel wire, the advancing direction of the medical catheter rapidly rotates in a patient body, and meanwhile, the first end of the medical hose is connected with the pressure detector, so that the pressure of the first end of the medical hose when advancing in a cavity of the patient is detected, the expected external collision of the catheter and the cavity wall is timely avoided, and the safety and reliability of an interventional operation are improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic perspective view of a medical catheter according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a medical catheter according to an embodiment of the present invention;

FIG. 3 is an exploded view of a further perspective view of a medical catheter according to an embodiment of the present invention;

FIG. 4 is a schematic view of a cross-sectional structure of a medical catheter according to an embodiment of the present invention;

FIG. 5 is a schematic view of a cross-sectional structure of a medical catheter according to an embodiment of the present invention;

FIG. 6 is a schematic view of another perspective view of a medical catheter according to an embodiment of the present invention;

FIG. 7 is an exploded view of yet another embodiment of a medical catheter according to an embodiment of the present invention;

FIG. 8 is a schematic view of another perspective view of a medical catheter according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of a sliding structure of a medical catheter according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, a schematic perspective view of a medical catheter according to an embodiment of the invention is provided, wherein the medical catheter includes a bending control catheter 10 and a pressure detector 20.

The bend control catheter 10 comprises a hose 110, a sleeve 120 and a bend control steel wire 130, wherein the sleeve 120 is arranged on the outer wall of the hose 110 along the length direction of the hose 110, and the bend control steel wire 130 is arranged in the sleeve 120 and can move freely; the pressure detector 20 is connected to the first end 1101 of the hose 110, and is configured to detect a pressure of the first end 1101 of the hose 110 when the bending control catheter 10 is rotated in bending; wherein a first end 1301 of the bend control wire 130 is connected to the pressure detector 20, and a second end 1302 of the bend control wire 130 is disposed outside a second end 1102 of the hose 110 through the sleeve 120.

Specifically, referring to fig. 2, a schematic cross-sectional structure of a medical catheter according to an embodiment of the present invention is shown, the hose 110 is an innermost structure of the medical catheter, the material of the hose 110 includes, but is not limited to, polytetrafluoroethylene (PTFE), and in a preferred embodiment, the hose 110 is a PTFE tube with a thinner tube wall, and the length of the hose 110 is not limited further, and may be considered as an indefinite length structure, and is freely customized according to actual use requirements.

The sleeves 120 are disposed at the outer circumference of the hose 110 and are disposed along the outer circumference of the hose 110, and the number of the sleeves 120 is at least one. Each sleeve 120 is disposed on the outer wall of the hose 110 along the length direction of the hose 110, and the sleeve 120 may be understood as a sandwich layer on the outer wall of the hose 110, that is, the sleeve 120 and the hose 110 are integrally formed, and the sleeve 120 and the hose 110 may be integrally formed in a process, and a specific forming method includes, but is not limited to, integral injection molding, or a catheter extrusion process. Each sleeve 120 is internally provided with one bend-controlling steel wire 130, wherein the bend-controlling steel wire 130 passes through the sleeve 120, two ends of the bend-controlling steel wire 130 are respectively positioned outside the sleeve 120, wherein the first end 1301 of the bend-controlling steel wire 130 is strung out of the end of the sleeve 120 and the first end 1101 of the hose 110 are fixedly connected to the pressure detector 20, the second end 1302 of the bend-controlling steel wire 130 passes through the sleeve 120 and is strung out of the other end of the sleeve 120 and is positioned outside the second end 1102 of the hose 110, the first end 1301 of the bend-controlling steel wire 130 is a fixed end, and the second end 1302 of the bend-controlling steel wire 130 is a free end.

The bend control wire 130 may freely move in the sleeve 120, and when in use, the second end 1302 of the bend control wire 130 may be pulled by force, so that the bend control wire 130 may freely move in the sleeve 120, and when the second end 1302 of the bend control wire 130 is pulled by force, the bend control wire 130 may not be pulled out of the sleeve 120, and the first end 1101 of the hose 110 may bend in the direction of the pulled bend control wire 130 due to the tensile force, i.e. the front end of the medical catheter pair may rotate.

The pressure detector 20 is connected to the first end 1101 of the hose 110, and the first end 1301 of the bending control wire 130 is fixedly connected to the pressure detector 20, when the bending control catheter 10 travels in the patient's cavity, including but not limited to, moving back and forth in the patient's cavity, rotating and bending in the patient's cavity, etc., the pressure detector 20 can detect the pressure of the first end 1101 of the hose 110 in real time, that is, the collision force generated when the head end of the bending control catheter 10 collides with the cavity wall during operation, that is, the head end force detection function is provided for the medical catheter, and the expected external collision between the medical catheter and the cavity wall is avoided in time, so that the safety and reliability of the interventional operation can be ensured.

Here, the pressure detector 20 may output the corresponding detection result outwards in a wired or wireless manner through a communication cable or a wireless communication module, for example, may output the detection result outwards to a display device of the magnetic navigation medical system, so that the detection result is known by an operator; the prompt module can also be output to the medical catheter operating handle outwards, and specific prompt modes comprise, but are not limited to, one or more of lamplight prompt, sound prompt, vibration prompt and the like.

In order to better control the rotational bending direction of the distal end of the medical catheter, a structure for enhancing the rigidity of the sleeve 120 is generally provided on the outer periphery thereof, and the structure for enhancing the rigidity of the medical catheter includes, but is not limited to, a metal mesh provided on the outer periphery of the sleeve 120.

For the case that the number of the sleeves 120 provided on the outer wall of the hose 110 is not less than 3, for example, three or more bending control wires 130 can provide better rigidity for the medical catheter, and the bending direction of the medical catheter is easier to control even if the medical catheter is locally stressed, the structure for enhancing the rigidity of the sleeve 120 is not required to be provided on the outer side Zhou Ewai of the sleeve 120, and of course, if the structure for enhancing the rigidity of the sleeve 120 is additionally provided on the outer periphery of the sleeve 120, the rigidity of the medical catheter can be further enhanced, which is beneficial to precisely controlling the rotating bending direction of the front end of the medical catheter, and similarly, the structure for enhancing the rigidity of the medical catheter includes but is not limited to providing a metal net on the periphery of the sleeve 120

Moreover, in order to ensure that the sleeve 120 can freely move in the sleeve 120, the sleeve 120 is made of a material including, but not limited to, a low-friction polymer material such as PTFE, PP, etc., and the bending control steel wire 130 is preferably a single-strand high-strength steel wire, although a twist-shaped structure formed by braiding a plurality of steel wires is not excluded; in other preferred embodiments of the present invention, a corresponding lubricant may be disposed in the sleeve 120 to reduce friction when the bending control wire 130 freely moves in the sleeve 120, thereby improving the operation efficiency of the sleeve 120.

Next, it should be noted that the above mentioned force pulling the second end 1302 of the bending control wire 130 may be a manual pulling force of a medical staff during diagnosis and treatment, or may be a mechanical pulling force by means of a motor and a screw rod structure.

Further, referring to fig. 3, a schematic exploded view of a three-dimensional structure of a medical catheter according to an embodiment of the invention is shown, wherein the pressure detector 20 includes an elastic ring 210, a reflecting mirror 220 and a ranging sensor 230;

the reflecting mirror 220 and the distance measuring sensor 230 are arranged at a certain interval in the elastic ring 210, the reflecting surface of the reflecting mirror 220 faces the sensing surface of the distance measuring sensor 230, one surface of the distance measuring sensor 230, which faces away from the reflecting mirror 220, is connected with the first end 1101 of the hose 110, and the first end 1301 of the bending control steel wire 130 is connected with the end part of the elastic ring 210.

Specifically, one end of the elastic ring 210 is sleeved on the first end 1101 of the hose 110, such that the first end 1301 of the bending control wire 130 is connected to the end of the elastic ring 210, so as to fix the first end 1301 of the bending control wire 130, and the reflecting mirror 220 and the ranging sensor 230 are located in the elastic ring 210, and the ranging sensor 230 is located between the reflecting mirror 220 and the first end 1101 of the hose 110, and the reflecting mirror 220 and the ranging sensor 230 are disposed at a distance. Here, the ranging sensor 230 is a reflective optical fiber ranging sensor, the optical fiber 240 is disposed in the hose 110 and penetrates through the ranging sensor 230, an optical fiber emission port is disposed on a surface of the ranging sensor 230 facing the reflecting mirror 220 (i.e., a sensing surface of the ranging sensor 230), when the light beam is emitted from the optical fiber emission port, the light beam reaches the sensing surface of the ranging sensor 230 through the emission of the reflecting mirror 220, and the ranging sensor 230 converts the light intensity into a voltage signal, and obtains the light intensity through the voltage signal. As shown in fig. 4, the distance between the optical fiber head end of the incident light and the reflecting mirror 220 is d, and when the optical fiber probe is closely attached to the reflecting mirror 220 (i.e., d=0), the light intensity received by the ranging sensor 230 is zero. As d increases, the received light intensity gradually increases, and decreases as d increases after reaching the maximum point, so that the d value can be obtained by detecting the light intensity, that is, the d value can be obtained by the voltage signal measured by the sensing surface of the ranging sensor 230. In this embodiment of the present invention, the distance measuring sensor 230 and the reflecting mirror 220 are disposed in the elastic ring 210 together, when the first end 1101 of the flexible tube 110 is pressed, the elastic ring 210 will deform, resulting in a change of d value, and the d value measured by the reflective light distance measuring sensor can be converted into stress information of the first end 1101 of the flexible tube 110 by the hooke coefficient of the elastic ring 210, so that the head end (the first end 1101 of the flexible tube 110) of the medical tube has a force detecting function, and further, the anticipated external collision between the medical tube and the wall of the cavity is avoided in time, so that the safety and reliability of the interventional operation can be ensured.

In addition, referring to fig. 5, a schematic cross-sectional structure of a medical catheter according to an embodiment of the invention is provided, wherein a plurality of sleeves 120 are disposed on an outer wall of the hose 110, and the plurality of sleeves 120 are distributed at equal intervals along a circumference of the outer wall of the hose 110.

Here, the outer circumference of the hose 110 is provided with a plurality of the sleeves 120, that is, a plurality of the sleeves 120 are provided at the outer wall of the hose 110, wherein the plurality of the sleeves 120 are arranged at equal intervals along the circumference of the outer wall of the tube section of the hose 110.

In the above embodiment, the bending control steel wires 130 are arranged in the plurality of sleeves 120 to form a bending control structure, and then the ends of the hoses 110 can be bent in different directions by pulling different bending control steel wires 130 of the sleeves 120, so that the rotation directions of the ends of the hoses 110 are richer, and the application range of the medical catheter is promoted.

Further, in other preferred embodiments of the present invention, as shown in the drawings, 4 sleeves 120 are disposed on the outer wall of the hose 110, and two adjacent sleeves 120 are disposed at 90 degrees on the outer wall of the hose 110.

Specifically, 4 sleeves 120 are disposed at equal intervals on a circumference of an outer wall of a tube section of the hose 110, and two adjacent sleeves 120 are disposed on the outer wall of the hose 110 at an included angle of 90 degrees, that is, four sleeves 120 are disposed on the outer circumference of the hose 110. By pulling the bending control wires 130 of the sleeve 120 at different positions, the end of the hose 110 can be bent in different directions; in addition, the bending control wires 130 of two adjacent sleeves 120 may be pulled simultaneously, so as to further change the rotation direction of the end of the hose 110, so that the rotation direction of the end of the hose 110 is richer, and the application range of the medical catheter is further improved.

Further, referring to fig. 6, a schematic three-dimensional structure of a medical catheter according to an embodiment of the invention is shown, and the medical catheter further includes a mesh grid 140, where the mesh grid 140 is tubular, is disposed outside the sleeve 120, and wraps the sleeve 120 and the hose 110.

Specifically, the mesh grid 140 is formed by, but not limited to, braiding with metal wires, such as braiding with steel wires into a tubular shape, and is sleeved outside the sleeve 120 to wrap the sleeve 120 and the hose 110 therein, wherein the mesh grid 140 has good rigidity, is arranged at the periphery of the medical catheter, and can effectively prevent the medical catheter from being extruded and deformed, and can also avoid extrusion of the sleeve 120, thereby avoiding increasing friction force of the bending control steel wire 130 when moving in the sleeve 120, improving smoothness of the bending control steel wire 130 when moving, and further increasing rotational flexibility of the first end 1101 of the hose 110; in addition, the mesh grid 140 may further provide good torque transmission performance, so that on one hand, the flexibility of the rotation of the first end 1101 of the hose 110 may be further improved, and on the other hand, the controllability of the first end 1101 of the hose 110 when the first end 1101 of the hose 110 is forced to rotate may be improved, so that the rotation of the first end 1101 of the hose 110 is more accurate, and the bending control precision of the medical catheter may be improved.

In addition, referring to fig. 5, in another embodiment of the present invention, the medical catheter further includes an outer tube 150, the outer tube 150 is disposed on the outer periphery of the hose 110, and the sleeve 120 and the mesh grid 140 are embedded in the wall of the outer tube 150.

Specifically, the outer tube 150 is wrapped around the outer circumference of the hose 110, and the outer wall of the outer tube 150 is directly contacted with the human body of the patient, where the outer tube 150 may be made by a catheter extrusion process or a nano injection molding process, the sleeve 120 on the outer wall of the hose 110 and the mesh grid 140 around the sleeve 120 are inlaid in the wall of the outer tube 150, that is, the gap outside the hose 110 is filled with the material for making the outer tube 150, and the material for making the outer tube 150 includes, but is not limited to, PEBAX or other polymer materials.

More specifically, one end of the outer tube 150 is sleeved on the elastic ring 210. Specifically, the outer tube 150 wraps the elastic ring 210, the hose 110, and the mesh grid 140 together.

In addition, referring to fig. 7, an exploded schematic view of another three-dimensional structure of a medical catheter according to an embodiment of the present invention is provided, the medical catheter further includes a catheter head end 40, and the catheter head end 40 is sleeved on the inner wall of the outer tube 150.

Specifically, the catheter head end 40 is the foremost end of the medical catheter, and the end of the catheter head end facing the outer tube 150 may be sleeved on the elastic ring 210 or sleeved in the elastic ring 210, or may be in no overlapping relation with the elastic ring 210, and the two ends are butted together and connected together through the outer tube 150 of the outer layer; of course, in order to ensure that the stress of the catheter head end 40 is well transferred to the elastic ring 210 and deform the elastic ring 210, a good fixed connection between the elastic ring 210 and the catheter head end 40 is required, and in particular, the connection may be performed by gluing or welding.

Further, the catheter head end 40 includes an insertion portion 410 and an external portion 420, the insertion portion is inserted into the inner wall of the outer tube 150, and the external portion 420 is disposed outside the end of the outer tube 150.

Specifically, the plugging portion 410 and the external portion 420 are connected, generally in an integrally formed structure, the pipe diameter of the plugging portion 410 is smaller than that of the external portion 420, the plugging portion 410 is used for being plugged into the inner wall of the outer tube 150 so as to fix the catheter head end 40 and the hose 110, in a preferred embodiment, the outer periphery of the plugging portion 410 and the end of the outer tube 150 may be adhered by adhesive so as to enhance the fixing strength between the catheter head end 40 and the outer tube 150, the external portion 420 is located outside the outer tube 150, and the pipe diameter of the external portion 420 may be larger than that of the outer tube 150 or slightly smaller than that of the hose 110, which is not limited strictly herein.

In addition, in order to facilitate the smooth travel of the front end of the medical catheter in the patient, the end of the external portion 420 away from the insertion portion 410 is generally subjected to a smooth treatment, i.e. designed into a shaped structure with a slightly pointed front end.

Further, in one implementation of the present invention, the end of the external portion 420 is provided with a working channel 4201 for placing medical tools, and the working channel 4201 communicates with the hose 110.

The working channel 4201 is disposed in the catheter head 40, and the working channel 4201 is in communication with the flexible tube 110 for placing a medical tool for diagnosing a patient, where corresponding working channels are also disposed on the reflector 220 and the ranging sensor 230 for communicating the working channel 4201 with the flexible tube 110; specifically, the port of the working channel 4201 is located at the end of the external portion 420 away from the first end 1101 of the hose 110, i.e., the medical tool enters through the second end 1102 of the hose 110, reaches the first end 1101 of the hose 110 along the entire hose 110, and then passes through the plugging portion 410 of the catheter head end 40 and the external portion 420, and protrudes from the working channel 4201 at the end of the external portion 420, so as to diagnose the lesion of the patient at the front end of the catheter.

Still further, in a further implementation of the present invention, an image groove 4202 for placing a camera and at least one illumination groove 4203 for placing an illumination unit are provided at the outer circumference of the working channel 4201.

Specifically, the image slot 4202 and at least one illumination slot 4203 are distributed on the periphery of the port of the working channel 4201, and a camera is disposed in the image slot 4202, for acquiring real-time images of the front end of the catheter, where the camera includes, but is not limited to, a wide-angle camera, and may capture a larger range of the front end of the catheter, and includes CMOS photosensitive elements, lenses, driving circuits, and other parts, which may be separated from each other, or may be integrated on a module, and the camera transmits video signals to a video processing circuit of an external device through (shielding) wires (and connectors).

The lighting groove 4203 is internally provided with LED lamps, the LED lamps are connected to an LED lamp driving circuit of an external device through wires (and connectors), the driving circuit can use DC voltage regulation and light modulation or PWM light modulation, the number of the LED lamps is 1-4 or more, and the number of the LED lamps can be set according to the area of the end of the external portion 420 away from the first end 1101 of the hose 110, or according to the actual diagnosis and treatment position requirement.

In addition, the outer portion 420 is made of a transparent material, and the illumination slot 4203 is enclosed within the outer portion 420.

The external portion 420 made of transparent material may be made of transparent plastic by injection molding, and the hose 110 is inserted into the socket portion 410 to be adhered to the external portion, so that it is ensured that light of the LED lamp in the illumination slot 4203 enclosed therein can be transmitted to the front end of the catheter, and on the premise of ensuring illumination requirements, body fluid of a patient can be prevented from entering the illumination slot 4203 during the advancing process of the catheter in the patient, illumination effect is improved, illumination safety is improved, and focus diagnosis and treatment of the patient can be performed rapidly and accurately.

Here, it should be noted that only the illumination tank 4203 is subjected to the sealing process, and the image tank 4202 does not require the relevant process.

In addition, in another preferred embodiment of the present invention, the external portion 420 is made of a metal material, the hose 110 is inserted through the plugging portion 410, and the illumination groove 4203 and the image groove 4202 are respectively disposed at the end of the external portion 420, and the LED lamp is mounted in the illumination groove 4203 and is flush with the end surface after being mounted.

In addition, referring to fig. 8 and 9, 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 end of the outer tube 150 away from the first end 1101 of the hose 110, a sliding groove 5101 for the wire slider 520 to slide reciprocally is provided on the slider base 510 along the length direction, and the second end 1302 of the bend control wire 130 penetrates out of the outer tube 150 and is connected with the wire slider 520.

Specifically, the end of the outer tube 150 away from the first end 1101 of the hose 110 is connected to the slider base 510, and the two may be spliced, welded or integrally formed, where the shape of the slider base 510 includes, but is not limited to, a cylindrical shape, or a prismatic structure, the outer diameter of the slider base 510 is generally larger than the outer diameter of the outer tube 150, the sliding groove 5101 is provided along the length direction of the slider 520, the slider 520 may slide reciprocally in the sliding groove 5101, the end of the slider 520 facing the first end 1101 of the hose 110 is connected to the bending control wire 130, specifically, the second end 1302 of the bending control wire 130 penetrates the surface of the outer tube 150 and is connected to the slider 520, when the slider 520 slides in the sliding groove 5101, the bending control wire 130 drives the head section of the hose 110 to bend, such that when the bending control wire 130 is pulled, the head section of the hose 110 bends toward the pulled bending control wire 130, and the front end of the medical catheter rotates.

Still further, the medical catheter further includes a catheter fixing base 60, and the catheter fixing base 60 is disposed at the outer circumference of the outer tube 150 between the exit point of the second end 1302 of the bending control wire 130 and the slider base 510.

Specifically, the catheter fixing base 60 is in a horn shape, one end with a larger size faces the end of the slider base 510, one end with a smaller size faces the exit point of the second end 1302 of the bend control steel wire 130, the exit point is sleeved on the outer periphery of the outer tube 150, the bend control steel wire 130 passes through the outer wall of the outer tube 150, and is connected with the steel wire slider 520 through the transition of the outer wall of the catheter fixing base 60, and the catheter fixing base 60 plays a role in transition of the bend control steel wire 130, so that the bend control steel wire 130 can uniformly reciprocate.

In other preferred embodiments of the present invention, the surface of the catheter fixing base 60 is provided with a wire groove for positioning the bending control wire 130, so that the bending control wires 130 are arranged in all directions of the outer tube 150, and the requirement of rotating the head section of the hose 110 in multiple directions is met.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

It will be appreciated by those skilled in the art that 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, and the like) having computer-usable program code embodied therein.

The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.

Claims (14)

1. A medical catheter, comprising:

the bending control catheter comprises a hose, a sleeve and a bending control steel wire, wherein the sleeve is arranged on the outer wall of the hose along the length direction of the hose, and the bending control steel wire is arranged in the sleeve and can move freely;

a pressure detector connected to the first end of the hose for detecting the pressure of the first end of the hose as the bend control catheter travels within the patient's lumen;

wherein, the first end of accuse curved steel wire is connected on the pressure detector, the second end of accuse curved steel wire passes the sleeve pipe is arranged in outside the second end of hose.

2. The medical catheter of claim 1, wherein the pressure detector comprises an elastic ring, a mirror, and a ranging sensor;

the reflecting mirror and the distance measuring sensor are arranged in the elastic ring at intervals, the reflecting surface of the reflecting mirror faces the sensing surface of the distance measuring sensor, one surface of the distance measuring sensor, which faces away from the reflecting mirror, is connected with the first end of the hose, and the first end of the bending control steel wire is connected with the end part of the elastic ring.

3. The medical catheter of claim 2, further comprising a mesh braid, the mesh braid being tubular, disposed on the exterior of the sheath, and encasing the sheath and the hose.

4. The medical catheter of claim 1, wherein a plurality of said sleeves are provided on the outer wall of said hose, said plurality of sleeves being equally spaced along the circumference of the outer wall of said hose.

5. The medical catheter of claim 4, wherein 4 sleeves are provided on the outer wall of the hose, and two adjacent sleeves are provided at 90 degrees on the outer wall of the hose.

6. The medical catheter of claim 3, further comprising an outer tube disposed about the outer circumference of the hose, the sleeve and the mesh braid being embedded within the wall of the outer tube.

7. The medical catheter of claim 6, wherein one end of the outer tube is sleeved on the elastic ring.

8. The medical catheter of claim 7, further comprising a catheter tip that is sleeved over an inner wall of the outer tube.

9. The medical catheter of claim 8, wherein the catheter tip comprises a plug portion that plugs into an inner wall of the outer tube and an external portion that is external to an end of the outer tube.

10. The medical catheter of claim 9, wherein an end of the external portion is provided with a working channel for placement of a medical tool, the working channel being in communication with the hose.

11. The medical catheter of claim 10, wherein the working channel has an imaging channel at its periphery for placement of a camera and at least one illumination channel for placement of an illumination unit.

12. The medical catheter of claim 11, wherein the outer portion is made of a transparent material and the illumination slot is enclosed within the outer portion.

13. The medical catheter of claim 1, further comprising a sliding structure comprising a slider base and a wire slider;

the sliding block base is connected to the end part of the outer tube, which is far away from the first end of the hose, a sliding groove for the steel wire sliding block to slide back and forth is formed in the sliding block base along the length direction, and the second end of the bending control steel wire penetrates out of the outer tube and is connected with the steel wire sliding block.

14. The medical catheter of claim 13, further comprising a catheter securement seat disposed at an outer periphery of the outer tube between a point of egress of the second end of the bend control wire and the slider base.