Endoscope ultrasonic catheter

Abstract

The invention discloses an endoscope ultrasonic catheter, and relates to the technical field of endoscopes, the endoscope ultrasonic catheter comprises a catheter body, an adjusting part, an ultrasonic probe assembly, a navigation positioning assembly and a biopsy assembly, the catheter body is internally provided with a first mounting cavity and a second mounting cavity which are arranged side by side in the radial direction of the catheter body, and the far end of the first mounting cavity is provided with a movable outlet; the far end of the second mounting cavity is of a closed structure; the adjusting part is arranged between the first mounting cavity and the second mounting cavity, and a preset angle is formed between the adjusting part and the axis of the pipe body; the ultrasonic probe assembly is arranged in the second mounting cavity; the navigation positioning assembly is arranged in the adjusting part; the biopsy assembly is movably arranged in the first mounting cavity, can extend out of the movable outlet and extends along the adjusting part, so that the biopsy assembly inclines by a preset angle relative to the axis of the tube body. Due to the integrated arrangement of the biopsy assembly, the ultrasonic probe assembly and the navigation positioning assembly, the operation time of a clinical operation is shortened, the examination accuracy is improved, and the diagnosis rate is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of endoscopes, and more specifically to an endoscopic ultrasonic catheter. Background Art

[0002] Endoscope is a detection instrument that integrates traditional optics, ergonomics, precision machinery, modern electronics, mathematics, software, etc. With the rapid development of science and medical technology in recent years, endoscopic minimally invasive or non-invasive medical examination and treatment have become widely popular. Endoscopes can enter the human body through natural channels or surgical incisions to inspect or treat internal organs. Therefore, endoscopes are widely used in minimally invasive or non-invasive medical operations and have become an indispensable part of modern medicine.

[0003] A bronchoscope is an endoscope used to observe and diagnose respiratory diseases. Traditional bronchoscopes have a positioning system that can guide the bronchoscope to the target position. The operator then inserts instruments such as biopsy forceps into the target position for diagnostic examination. Its functions are relatively simple, and it is unable to scan images in real time during biopsy sampling or insertion into the target position. It is unable to obtain real-time images entering the human cavity and real-time images during the sampling process, and thus cannot guarantee the diagnosis rate. Summary of the invention

[0004] The present application provides an endoscopic ultrasound catheter that integrates biopsy sampling, electromagnetic positioning and ultrasound image acquisition, which can improve sampling accuracy and ensure diagnosis rate.

[0005] The present application provides an endoscopic ultrasound catheter, comprising:

[0006] A tube body, wherein a first installation cavity and a second installation cavity isolated from each other are provided inside the tube body, the first installation cavity and the second installation cavity are arranged side by side along the radial direction of the tube body, a movable outlet is provided at the far end of the first installation cavity so that the first installation cavity is connected with the outside; and the far end of the second installation cavity is a closed structure;

[0007] An adjusting portion, wherein the adjusting portion is disposed between the first mounting cavity and the second mounting cavity, and a preset angle is formed between the adjusting portion and the axis of the tube body;

[0008] an ultrasonic probe assembly, the ultrasonic probe assembly being disposed in the second mounting cavity and being used to acquire image information of a target position;

[0009] a navigation and positioning component, the navigation and positioning component is disposed inside the adjusting portion and is used for navigating and positioning the tube body to the target position; and

[0010] A biopsy component is movably disposed in the first mounting cavity and can extend from the movable outlet and extend along the adjusting portion so that the biopsy component is inclined at the preset angle relative to the axis of the tube body.

[0011] In an optional embodiment, the ultrasonic probe assembly includes an ultrasonic transducer, a transmission shaft and a mounting seat, the mounting seat is arranged in the second mounting cavity, the ultrasonic transducer is arranged on the mounting seat, and the transmission shaft is connected to the mounting seat and can drive the mounting seat and the ultrasonic transducer to rotate and / or move.

[0012] In an optional embodiment, the navigation and positioning component includes an electromagnetic element and a connecting wire, and the electromagnetic element is connected to an external circuit through the connecting wire and generates a magnetic field when powered on.

[0013] In an optional embodiment, the endoscopic ultrasonic catheter further includes a flexible structure, wherein the flexible structure is disposed inside the tube body and at the proximal ends of the first installation cavity and the second installation cavity.

[0014] In an optional embodiment, a third installation cavity is provided in the tube body, and the third installation cavity is arranged at the proximal end of the first installation cavity and the second installation cavity, and is connected to the first installation cavity and the second installation cavity, and the flexible structure is arranged in the third installation cavity.

[0015] In an optional embodiment, a fourth mounting cavity and a fifth mounting cavity are provided at the proximal end of the third mounting cavity, which are arranged sequentially along the radial direction of the tube body, and the fourth mounting cavity is connected to the first mounting cavity through the third mounting cavity, and the fifth mounting cavity is connected to the fifth mounting cavity through the third mounting cavity.

[0016] In an optional embodiment, a preset angle between the adjusting portion and the axis of the tube body is 5°-30°.

[0017] In an optional embodiment, the tube body includes a first side wall, a second side wall and a third side wall, the first side wall and the second side wall enclose the second installation cavity, the second side wall is inclined relative to the axis of the tube body to form the adjustment part, and the second side wall and the third side wall form the first installation cavity and the movable outlet.

[0018] In an optional embodiment, the tube body includes a first side wall, a second side wall and a third side wall, the first side wall and the second side wall enclose the second installation cavity, the second side wall and the third side wall form the first installation cavity and the movable outlet, and the adjustment portion is arranged on a side of the second side wall close to the first installation cavity.

[0019] In an optional embodiment, a marking structure is further provided on the second side wall, and the marking structure is made of a material that can be developed under X-rays.

[0020] According to the endoscopic ultrasonic catheter in the above embodiment, it includes a tube body, an adjustment part, an ultrasonic probe assembly, a navigation and positioning assembly, and a biopsy assembly. By integrating the biopsy assembly, the ultrasonic probe assembly, and the navigation and positioning assembly together, the ultrasonic catheter has the functions of real-time image acquisition, precise positioning, and biopsy. When in use, the ultrasonic probe assembly is used to obtain image information of the position of the ultrasonic catheter in real time, and then the navigation and positioning assembly and the ultrasonic probe assembly cooperate with each other to accurately make the ultrasonic catheter reach the target position. After it reaches the target position, the biopsy assembly is inserted, and the adjustment part is used to adjust the inclination angle of the biopsy assembly, so that the biopsy assembly can sample and diagnose the target position at a preset angle, thereby reducing the operation time of clinical surgery. At the same time, the ultrasonic probe assembly can obtain real-time images of sampling diagnosis, which helps the operator to adjust according to the situation, thereby helping to improve the accuracy of the examination and ensure the diagnosis rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the structure of an endoscopic ultrasound catheter in an embodiment;

[0022] Figure 2 is a structural cross-sectional view of an endoscopic ultrasound catheter in an embodiment;

[0023] Figure 3 for Figure 2 A partial enlarged schematic diagram of

[0024] Figure 4 is a structural cross-sectional view of a tube body in an embodiment;

[0025] Figure 5 It is a schematic diagram of the disassembled structure of an endoscopic ultrasound catheter in an embodiment.

[0026] Among them: 1. Tube body; 11. First installation cavity; 111. Active outlet; 12. Second installation cavity; 13. Third installation cavity; 14. Fourth installation cavity; 15. Fifth installation cavity; 16. First side wall; 17. Second side wall; 18. Third side wall; 2. Adjustment part; 3. Ultrasonic probe assembly; 31. Ultrasonic transducer; 32. Transmission shaft; 33. Mounting seat; 4. Navigation and positioning assembly; 5. Biopsy assembly; 6. Flexible structure; 7. Marking structure; X, axial; Y, radial. DETAILED DESCRIPTION

[0027] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0028] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0029] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0031] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0032] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In order to more clearly describe the structure of the present application, "proximal" and "distal" are used as directional words. "Proximal" refers to the end of the structure close to the operator when in use, and "distal" refers to the end of the structure far away from the operator when in use, that is, the end close to the patient or extending into the patient's body.

[0034] The present application provides an endoscope, which may be a bronchoscope, comprising an operating mechanism and an endoscopic ultrasonic catheter (hereinafter referred to as "ultrasonic catheter"). The ultrasonic catheter has a proximal end and a distal end, and its distal end also defines the distal end of the entire endoscope. The operating mechanism is arranged at the proximal end of the ultrasonic catheter and can control the movement and rotation of the ultrasonic catheter.

[0035] See also Figures 1 to 5 The ultrasonic catheter comprises a tube body 1, an adjustment part 2, an ultrasonic probe assembly 3, a navigation and positioning assembly 4 and a biopsy assembly 5. The ultrasonic catheter has an axial direction X and a radial direction Y perpendicular thereto. The axial direction X of the ultrasonic catheter is its length direction, which is also the direction from the proximal end to the distal end. The ultrasonic catheter can move along the body cavity of the human body to the target position.

[0036] The tube body 1 constitutes the overall appearance of the ultrasonic catheter, and the tube body 1 can be understood as a collection of multiple components, or it can be an integrally formed structure. The tube body 1 provides installation and activity space for the ultrasonic probe assembly 3, the navigation positioning assembly 4 and the biopsy assembly 5. Specifically, the interior of the tube body 1 is provided with a first installation cavity 11 and a second installation cavity 12 that are isolated from each other. The first installation cavity 11 and the second installation cavity 12 extend along the axial direction X of the tube body 1 and are arranged side by side along the radial direction Y of the tube body 1. A movable outlet 111 is provided at the distal end of the first installation cavity 11 to connect the first installation cavity 11 with the outside (the outside of the tube body 1). The adjustment portion 2 is arranged between the first installation cavity 11 and the second installation cavity 12, and a preset angle (such as 90°) is formed between the adjustment portion 2 and the axis of the tube body 1. Figure 3As shown, a preset angle A is formed, the ultrasonic probe assembly 3 is arranged in the second installation cavity 12, and the ultrasonic probe assembly 3 is used to obtain image information of the target position. The navigation and positioning assembly 4 is arranged inside the adjustment portion 2, and is used to navigate and position the tube body 1 to the target position. The biopsy assembly 5 is movably arranged in the first installation cavity 11, and can be extended from the movable outlet 111 and extend along the adjustment portion 2, so that the biopsy assembly 5 is inclined at a preset angle relative to the axis of the tube body 1.

[0037] By integrating the biopsy component 5, the ultrasonic probe component 3 and the navigation and positioning component 4 together, the ultrasonic catheter has the functions of real-time image acquisition, precise positioning and biopsy. When in use, the ultrasonic probe component 3 is used to obtain the image information of the position of the ultrasonic catheter in real time, and then the navigation and positioning component 4 and the ultrasonic probe component 3 cooperate with each other to accurately make the ultrasonic catheter reach the target position. After it reaches the target position, the biopsy component 5 is inserted, and the adjustment part 2 is used to adjust the inclination angle of the biopsy component 5, so that the biopsy component 5 can sample and diagnose the target position at a preset angle, thereby reducing the operation time of clinical surgery. At the same time, the ultrasonic probe component 3 can obtain real-time images of sampling diagnosis, which helps the operator to adjust according to the situation (for example, adjust the position, angle or type of the ultrasonic catheter 5), thereby helping to improve the accuracy of the examination and ensure the diagnosis rate.

[0038] When in use, the biopsy component 5 can also be inserted into the first installation cavity 11, and the ultrasonic probe component 3 can be inserted into the second installation cavity 12. The two can enter the human body cavity synchronously with the tube body 1 and move to the target position synchronously. Then, the biopsy component 5 can be extended from the active outlet 111 by using the operating mechanism to perform sampling diagnosis operations, which simplifies the operation of first inserting the tube body 1 and then inserting the biopsy component 5 in the traditional scheme, and can further improve the operating efficiency.

[0039] Due to the isolated setting of the first mounting cavity 11 and the second mounting cavity 12, the mutual interference between the biopsy component 5 and the ultrasonic probe component 3 can be avoided, and the ultrasonic probe component 3 can be protected. At the same time, the double-cavity structure can also reduce or avoid the friction between the ultrasonic probe component 3 and the biopsy component 5 during the rotation process.

[0040] In some optional embodiments, in order to ensure that the ultrasound probe assembly 3 can better acquire images for sampling diagnosis of the biopsy assembly 5, the distal end of the first mounting cavity 11 is arranged adjacent to the proximal end of the second mounting cavity 12, that is, the proximal ends of the first mounting cavity 11 and the second mounting cavity 12 are roughly side by side along the radial direction Y of the tube body 1, and the extension length of the first mounting cavity 11 is smaller than the extension length of the second mounting cavity 12, so that the distal end of the second mounting cavity 12 and the ultrasound probe assembly 3 therein are adjacent to the target position, and the biopsy assembly 5 is arranged adjacent to the target position after extending from the movable outlet 111, and the distal end of the biopsy assembly 5 is roughly at the same position as the distal end of the second mounting cavity 12.

[0041] In some optional embodiments, the biopsy component 5 includes but is not limited to a biopsy forceps, a cell brush or a puncture needle, and the operator can select a biopsy component 5 of different specifications and models according to clinical needs.

[0042] In some optional embodiments, the distal end of the second installation cavity 12 is a closed structure. When the ultrasound probe assembly 3 is working, a coupling agent needs to be injected, and the coupling agent is used to ensure efficient transmission of sound waves so as to efficiently acquire images. The coupling agent includes but is not limited to bubble water and oily liquid, and has a certain fluidity. The closed structural design can prevent the coupling agent from leaking, so as to ensure the quality and speed of image acquisition.

[0043] In some optional embodiments, the closed structure may be a smooth spherical structure or a planar structure formed by hot-melting the tube body 1 or by other methods. The smooth structural design may reduce friction during movement or rotation of the ultrasonic catheter and reduce pain to the patient.

[0044] Of course, in other embodiments, the distal end of the second mounting cavity 12 may also be an open structure, which has a relatively simple structure and is easy to prepare. However, the coupling agent is in contact with the air, and bubble water needs to be injected multiple times during clinical use to ensure that the air is discharged.

[0045] In some optional embodiments, the ultrasonic probe assembly 3 includes an ultrasonic transducer 31, a transmission shaft 32 and a mounting seat 33. The mounting seat 33 is disposed in the second mounting cavity 12 and is used to carry and protect the ultrasonic transducer 31. The transmission shaft 32 is connected to the mounting seat 33 and can drive the mounting seat 33 and the ultrasonic transducer 31 to rotate and / or move. The operating mechanism includes a driving motor, the output end of which is connected to the transmission shaft 32, and can drive the mounting seat 33 to rotate or move through the transmission shaft 32, thereby adjusting the ultrasonic transducer 31 to obtain image information from different positions and angles.

[0046] The ultrasonic transducer 31 includes a small ultrasonic probe of a single oscillator, which has a piezoelectric effect and is connected to a coaxial cable. Under certain pulse excitation conditions, it can transmit and receive ultrasonic signals to achieve the conversion of electrical energy and acoustic energy. The frequency of the ultrasonic transducer 31 can be selected from 5MHz to 100MHz, generally 12MHz, 20MHz, 30MHz or 40MHz. The transmission shaft 32 can be a spring wound with metal steel wire as a torsion transmission structure, generally a double-layer structure, and a single-layer or multi-layer structure can also be selected. The outer diameter size is as consistent as possible with the outer diameter size of the mounting seat 33, and the two can be fixed by adhesives or laser welding.

[0047] In some optional embodiments, the navigation and positioning component 4 includes an electromagnetic element and a connecting wire. The electromagnetic element is connected to an external circuit through the connecting wire and generates a magnetic field after being energized. In conjunction with it, an energized electromagnetic block is placed outside the body corresponding to the target position of the patient. The distance between the ultrasound catheter and the target position can be determined based on the induced current of the electromagnetic coil to guide the ultrasound catheter to the target position accurately. The electromagnetic element includes an electromagnetic coil and a magnetic core wound with extremely fine insulated wires. One or more electromagnetic coils are wound around a solid or hollow magnetic core to form an electromagnetic element, and a wire is led out to realize the signal transmission function.

[0048] In some optional embodiments, the endoscopic ultrasonic catheter further includes a flexible structure 6, which is arranged inside the tube body 1 and at the proximal ends of the first mounting cavity 11 and the second mounting cavity 12. The setting of the flexible structure 6 is used to improve the rigidity, anti-bending and anti-kinking capabilities of the tube body 1, so that the tube body 1 can be bent freely. When passing through the tortuous lumen in the human body, the setting of the flexible structure 6 provides a certain rigidity, thereby avoiding bending that affects the passability of the ultrasonic catheter. The flexible structure 6 can generally be a spiral or mesh structure. The flexible structure 6 can be selected from snake bones, or can be woven from flat steel wire or round steel wire. Of course, other heterogeneous structures can also be selected to be produced by laser cutting or other processing methods. The flexible structure 6 includes but is not limited to being made of metal materials or polymer materials. The length of the flexible structure 6 is generally 10mm-50mm, which is less than the length of the ultrasonic catheter. Of course, the length of the flexible structure 6 can also be consistent with the length of the ultrasonic catheter. Being arranged inside the ultrasonic catheter can improve the overall rigidity of the ultrasonic catheter. The adjusting portion 2 is connected to the flexible structure 6 , and the connection form is not limited to laser welding, brazing, adhesive bonding, etc., as long as the two are firmly combined.

[0049] See also Figure 4 In some optional embodiments, a third installation cavity 13 is provided in the tube body 1, and the third installation cavity 13 is arranged at the proximal end of the first installation cavity 11 and the second installation cavity 12, and is connected to the first installation cavity 11 and the second installation cavity 12, and the flexible structure 6 is arranged in the third installation cavity 13.

[0050] Please continue reading Figure 4 In some optional embodiments, the proximal end of the third mounting cavity 13 is provided with a fourth mounting cavity 14 and a fifth mounting cavity 15 which are arranged sequentially along the radial direction Y of the tube body 1, the fourth mounting cavity 14 is connected with the first mounting cavity 11 through the third mounting cavity 13, and the fifth mounting cavity 15 is connected with the fifth mounting cavity 15 through the third mounting cavity 13.

[0051] In some optional embodiments, the preset angle between the adjusting portion 2 and the axis of the tube body 1 is 5°-30°, so that the biopsy component 5 can take samples according to the angle. Exemplarily, the preset angle between the adjusting portion 2 and the axis of the tube body 1 can be 5°, 6°, 10°, 15° or 20°, etc. The adjusting portion 2 can be made of a metal material or a polymer material, and has a space inside to facilitate the installation and fixation of the navigation and positioning component 4.

[0052] Please continue reading Figure 4 In some optional embodiments, the tube body 1 includes a first side wall 16, a second side wall 17 and a third side wall 18, the first side wall 16 and the second side wall 17 enclose a second installation cavity 12, the second side wall 17 is inclined relative to the axis of the tube body 1 to form an adjustment portion 2, and the second side wall 17 and the third side wall 18 form a first installation cavity 11 and a movable outlet 111. The tube body 1 and the adjustment portion 2 are an integrally formed structure, which helps to reduce the size of the ultrasonic tube body 1 and is convenient for use in narrow cavities.

[0053] In other optional embodiments, the tube body 1 includes a first side wall 16, a second side wall 17 and a third side wall 18, the first side wall 16 and the second side wall 17 enclose a second installation cavity 12, the second side wall 17 and the third side wall 18 form a first installation cavity 11 and a movable outlet 111, and the adjustment part 2 is arranged on a side of the second side wall 17 close to the first installation cavity 11, that is, the adjustment part 2 can be detachably connected to the second side wall 17. In clinical applications, the operator can determine the angle of the biopsy according to the image information pre-acquired by the CT equipment, etc., and thus select the adjustment part 2 with different preset angles to be connected to the second side wall 17, thereby improving the scope of application of the ultrasonic tube body 1.

[0054] In some optional embodiments, the tube body may include a first part, a second part and a third part, the first part forms a first installation cavity 11, a second installation cavity 12 and a third installation cavity 13, the second part forms a fourth installation cavity 14 and a fifth installation cavity 15, and the third part forms an adjustment part 2. The three parts are detachably connected to facilitate storage or independent replacement, which can improve the convenience of the ultrasonic catheter.

[0055] In some optional embodiments, a marking structure 7 is further provided on the second side wall 17, and the marking structure 7 is made of a material that can be developed under X-rays. The marking material may include a platinum-iridium ring, a platinum-gold ring, or metal tungsten.

[0056] In some optional embodiments, the tube body 1 is made of polymer materials, including polytetrafluoroethylene (PTFE), block polyetheramide resin (PEBAX), polyamide (PA), polyimide (PI), and can encapsulate the flexible structure 6, electromagnetic components and regulators, and the encapsulation method includes hot air welding, laser welding or heat shrink tubing. The extension length of the tube body 1 is 500mm-2000mm, and the overall outer diameter is controlled between 1.0mm-3.0mm, which is adapted to the inner diameter of the human body cavity, especially to the peripheral tissue of the lungs with a smaller inner diameter of the human body cavity.

[0057] The above specific examples are used to illustrate the present application, which is only used to help understand the present application and is not intended to limit the present application. For technicians in the technical field to which the present application belongs, they can also make some simple deductions, deformations or substitutions based on the ideas of the present application.

Claims

1. An endoscopic ultrasound catheter, characterized in that: include: A tube body, wherein a first installation cavity and a second installation cavity isolated from each other are provided inside the tube body, the first installation cavity and the second installation cavity are arranged side by side along the radial direction of the tube body, a movable outlet is provided at the far end of the first installation cavity so that the first installation cavity is connected with the outside; and the far end of the second installation cavity is a closed structure; An adjusting portion, wherein the adjusting portion is disposed between the first mounting cavity and the second mounting cavity, and a preset angle is formed between the adjusting portion and the axis of the tube body; an ultrasonic probe assembly, the ultrasonic probe assembly being disposed in the second mounting cavity and being used to acquire image information of a target position; A navigation and positioning component, which is disposed inside the adjusting portion and is used for navigating and positioning the tube body to the target position; as well as A biopsy component is movably disposed in the first mounting cavity and can extend from the movable outlet and extend along the adjusting portion so that the biopsy component is inclined at the preset angle relative to the axis of the tube body.

2. The endoscopic ultrasound catheter according to claim 1, characterized in that: The ultrasonic probe assembly includes an ultrasonic transducer, a transmission shaft and a mounting seat. The mounting seat is arranged in the second mounting cavity, the ultrasonic transducer is arranged on the mounting seat, and the transmission shaft is connected to the mounting seat to drive the mounting seat and the ultrasonic transducer to rotate and / or move.

3. The endoscopic ultrasound catheter according to claim 1, characterized in that: The navigation and positioning component includes an electromagnetic element and a connecting wire. The electromagnetic element is connected to an external circuit through the connecting wire and generates a magnetic field after being powered on.

4. The endoscopic ultrasound catheter according to claim 1, characterized in that: The endoscopic ultrasonic catheter further includes a flexible structure, which is disposed inside the tube body and at the proximal ends of the first installation cavity and the second installation cavity.

5. The endoscopic ultrasound catheter according to claim 4, characterized in that: A third installation cavity is provided in the tube body, and the third installation cavity is provided at the proximal end of the first installation cavity and the second installation cavity, and is communicated with the first installation cavity and the second installation cavity, and the flexible structure is provided in the third installation cavity.

6. The endoscopic ultrasound catheter according to claim 5, characterized in that: The proximal end of the third mounting cavity is provided with a fourth mounting cavity and a fifth mounting cavity sequentially arranged along the radial direction of the tube body, the fourth mounting cavity is connected with the first mounting cavity through the third mounting cavity, and the fifth mounting cavity is connected with the fifth mounting cavity through the third mounting cavity.

7. The endoscopic ultrasound catheter according to claim 1, characterized in that: The preset angle between the adjusting portion and the axis of the tube body is 5°-30°.

8. The endoscopic ultrasound catheter according to claim 1, characterized in that: The tube body includes a first side wall, a second side wall and a third side wall, the first side wall and the second side wall enclose the second installation cavity, the second side wall is inclined relative to the axis of the tube body to form the adjustment portion, and the second side wall and the third side wall form the first installation cavity and the movable outlet.

9. The endoscopic ultrasound catheter according to claim 1, characterized in that: The tube body includes a first side wall, a second side wall and a third side wall, the first side wall and the second side wall enclose the second installation cavity, the second side wall and the third side wall form the first installation cavity and the movable outlet, and the adjustment portion is arranged on a side of the second side wall close to the first installation cavity.

10. The endoscopic ultrasound catheter according to claim 8 or 9, characterized in that: The second side wall is also provided with a marking structure, and the marking structure is made of a material that can be developed under X-rays.

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