Insertion part, endoscope and negative pressure suction assembly

Abstract

The invention discloses an insertion part, an endoscope and a negative pressure suction assembly, and relates to the technical field of medical instruments, the insertion part comprises a first section and a second section, the first section is provided with a front end assembly, and the first section is further provided with a first channel. The insertion part can be inserted into the sheath tube, and a fluid cavity channel is formed between the sheath tube and the insertion part. The blocking area of the first section can be matched with the inner wall of the sheathing canal so as to block a fluid cavity channel between the sheathing canal and the insertion part. Negative pressure suction force is formed in the fluid cavity channel through an external suction device and the like. As the blocking area blocks the fluid cavity channel, the negative pressure suction force can be transmitted to the first opening or the second opening and then extends to the position near the far end of the insertion part through the first channel. Negative pressure suction force in the sheath tube can be transmitted to the distal end of the negative pressure suction fitting to extend the suction range of the introducer sheath to the distal end of the insertion portion. Therefore, stone fragments in the deep position of the affected part can be sucked out, stone fragment residues are avoided, and the using effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an insertion portion, an endoscope, and a negative pressure suction component. Background Art

[0002] Guide sheaths and endoscopes are high-precision medical devices specifically designed for use in urological examinations and treatments. As an auxiliary tool, the guide sheath is typically used to guide an endoscope or other medical device into the urinary system, ensuring accurate and safe procedures. Its design fully considers the physiological structure of the human urinary system, effectively reducing surgical trauma and complications, thereby improving surgical success rates and patient recovery.

[0003] During urological treatments, an endoscope is inserted through a sheath into the renal calyx, such as for laser lithotripsy in the upper, middle, or lower calyces. The fragmented stones are then aspirated out of the body by the guide sheath. However, to minimize the effects of sheath movement and drag, existing guide sheaths often remain at the ureteral orifice. This results in a fixed aspiration range for the guide sheath, preventing the aspiration of all stone fragments, and causing stones to remain in the patient's body. Summary of the Invention

[0004] In view of the above shortcomings of the related art, the present invention discloses an insertion portion, an endoscope and a negative pressure suction component to solve the above technical problems.

[0005] The present application provides an insertion portion, comprising a first section and a second section, wherein the first section is provided with a front end assembly and a first channel, wherein the first channel has a first opening and a second opening distributed axially along the insertion portion, and a blocking area is provided on the peripheral wall of the first section, wherein the blocking area is located between the first opening and the second opening, and when at least a portion of the first section is within a sheath tube, the blocking area cooperates with the inner wall of the sheath tube to isolate the fluid cavity between the sheath tube and the insertion portion, and the second section is connected to the proximal end of the first section, and the insertion portion further comprises a second channel that passes through the first section and the second section.

[0006] To achieve the above objectives and other related objectives, the present application provides an endoscope, including the insertion portion as described above.

[0007] To achieve the above-mentioned purpose and other related purposes, the present application provides a negative pressure suction component, including an endoscope and a sheath as described above, the insertion part is inserted into the sheath, a fluid cavity is formed between the second section and the sheath, and the blocking area cooperates with the inner wall of the sheath to isolate the fluid cavity.

[0008] The technical solution adopted in the present invention can achieve the following beneficial effects: the insertion part can be inserted into the sheath tube, and a fluid cavity is formed between the sheath tube and the insertion part. The blocking area of the first section can cooperate with the inner wall of the sheath tube to isolate the fluid cavity between the sheath tube and the insertion part. A negative pressure suction force is formed in the fluid cavity by an external suction device, etc. Because the blocking area has isolated the fluid cavity, the negative pressure suction force can be transmitted to the first opening or the second opening, and then extended to the vicinity of the distal end of the insertion part through the first channel. The negative pressure attraction force in the sheath tube can be transmitted to the distal end of the negative pressure suction accessory, so that the suction range of the guide sheath extends to the distal end of the insertion part. This can enable the stone fragments deep in the affected area to be sucked out, avoid the residual stone fragments, and improve the use effect.

[0009] In addition, the first channel is the structure of the insertion part itself, which can move together with the insertion part. The first channel can flexibly suck out stone fragments in different positions, which also makes the suction range of the sheath more flexible, so that stone fragments in deeper parts can be sucked out. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 This is a schematic structural diagram of an endoscopic device and a guide sheath in the renal pelvis provided in an embodiment of the present application; Figure 2 is a schematic structural diagram of an endoscope provided in an embodiment of the present application; Figure 3 This is a schematic structural diagram of an insertion portion provided in an embodiment of the present application; Figure 4 is a cross-sectional view of an endoscope and a sheath provided in an embodiment of the present application; Figure 5 This is a schematic diagram of the structure of an insertion portion in the renal pelvis provided in an embodiment of the present application; Figure 6 is a schematic structural diagram of an endoscope and a sheath in another state provided by an embodiment of the present application; Figure 7 This is a schematic structural diagram of another insertion portion provided in an embodiment of the present application; Figure 8 is a cross-sectional view of another insertion portion provided in an embodiment of the present application; Figure 9This is a schematic structural diagram of another insertion portion provided in an embodiment of the present application; Figure 10 is a cross-sectional view of another endoscope and sheath provided in an embodiment of the present application; Figure 11 is a cross-sectional view of another endoscope and sheath provided in an embodiment of the present application; Figure 12 yes Figure 11 The enlarged view of point a in the figure; Figure 13 It is a schematic structural diagram of the negative pressure suction assembly provided in the embodiment of this application.

[0012] In the figure: 1. Endoscope; 100. Insertion part; 110. First section; 111. First channel; 112. First opening; 113. Second opening; 114. Bend section; 115. Front section; 116. Blocking area; 1161. Sealing part; 117. Front assembly; 120. Second section; 130. Second channel; 2. Negative pressure suction assembly; 210. Sheath; 211. Fluid cavity; 212. Closure structure; 310. Endoscope device; 320. Guide sheath. DETAILED DESCRIPTION

[0013] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0014] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0015] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0016] See also Figure 1, the existing guide sheath 320 often stays at the ureteral orifice, which will result in a fixed suction range of the guide sheath 320. Specifically, Figure 1 The dashed line in the figure shows the path for stone fragments to be expelled. The insertion portion of the endoscopic device 310 (e.g., an endoscope) shatters the stone and injects saline solution. Stone fragments located deep within the patient are too far from the guide sheath 320, resulting in an excessively long expulsion path for the stone fragments. The negative pressure suction force of the guide sheath 320 is too dispersed during the delivery process. The negative pressure suction effect of the guide sheath 320 is insufficient to reach the deep stone fragments, preventing them from being completely aspirated, resulting in residual stones in the patient's body.

[0017] This application provides an inserting portion 100, see Figure 1 as well as Figure 2 The inserting portion 100 may include a first section 110 and a second section 120 , and the second section 120 is connected to the proximal end of the first section 110 .

[0018] The first section 110 is provided with a front-end component 117, which includes but is not limited to a camera module and a lighting module. The lighting module is used to illuminate the environment in front of the first section 110, and the camera module can collect image information of internal tissues of the human body so that the calibration laser device can act smoothly on the stones or medical staff can observe the lesions.

[0019] See also Figure 3 The first section 110 further defines a first channel 111, which includes a first opening 112 and a second opening 113 distributed axially along the insert portion 100. In a more specific embodiment, the first opening 112 and the second opening 113 are located at opposite ends of the first channel 111, with one of the first opening 112 and the second opening 113 being located at the distal end of the first channel 111 and the other at the proximal end of the first channel 111. Exemplarily, a medium can enter the first channel 111 through the first opening 112 and exit the second channel 130 through the second opening 113. Of course, in other cases, at least one of the first opening 112 and the second opening 113 may not be located at the end of the first channel 111, and this is not limiting.

[0020] Understandably, please continue to refer to Figure 3The insertion portion 100 may further include a second channel 130 that passes through the first section 110 and the second section 120. The second channel 130 can be used to inject a medium, such as saline solution. It is understandable that the second channel 130 can extend to the operating side of the endoscope 1 and be connected to other devices, such as a pump body, without limitation. In addition, the insertion portion 100 may also be provided with a laser device, which is used to act on the stones to break the stones into stone fragments. The laser device can extend into the human body from the second channel 130. Of course, in some other cases, the laser device can be integrated into the front-end component 117, which is not limited here.

[0021] See also Figure 3 as well as Figure 4 The first section 110 is provided with a blocking region 116 on its circumferential wall, located between the first opening 112 and the second opening 113. The blocking region 116 can be distributed along the circumference of the first section 110, and the scope and shape of the blocking region 116 are not limited. The sheath 210 has a sheath 210 channel, into which the insertion portion 100 can be inserted. When at least a portion of the first section 110 is within the sheath 210, the blocking region 116 cooperates with the inner wall of the sheath 210 to isolate the fluid lumen 211 between the sheath 210 and the insertion portion 100. Exemplarily, the blocking region 116 can be distributed along the circumference of the first section 110, and the blocking region 116 and the inner wall of the sheath 210 can form an interference fit. The blocking region 116 can abut against the sheath 210 to block the fluid lumen 211 and prevent the negative pressure suction force within the fluid lumen 211 from being transmitted through the gap between the sheath 210 and the first section 110. The blocking area 116 of the first section 110 can cooperate with the inner wall of the sheath tube 210 to isolate the fluid channel 211 between the sheath tube 210 and the insertion part 100. Under the action of an external suction device, a negative pressure suction force is formed in the fluid channel 211. Figure 5 Because the blocking area 116 has isolated the fluid channel 211, the negative pressure suction force can be transmitted to the first opening 112 or the second opening 113, and then extended through the first channel 111 to the distal end of the insertion part 100. The negative pressure attraction force within the sheath 210 can be transmitted to the distal end of the negative pressure suction accessory, extending the suction range of the sheath 210 to the distal end of the insertion part 100. This can aspirate stone fragments deep in the affected area, preventing stone fragments from remaining, and improving the use effect.

[0022] See also Figure 6When it is necessary to aspirate stone fragments at the ureteral orifice, the medical staff can extend the first section 110 out of the sheath 210 by controlling the insertion portion 100, and the sheath 210 and the first section 110 are separated from each other. The range of the negative pressure suction force within the sheath 210 changes from the distal end of the first section 110 to the distal end of the sheath 210, which can quickly aspirate stone fragments near the proximal end of the sheath 210. This facilitates flexible adjustment of the aspiration range and ensures that the stone can be completely aspirated.

[0023] In addition, the first channel 111 is a structure of the insertion part 100 itself, which can move together with the insertion part 100. The first channel 111 can flexibly suck out stone fragments at different positions, which also makes the suction range of the sheath tube 210 more flexible, so that stone fragments at deeper depths can be sucked out.

[0024] It is understandable that in some other cases, the second channel 130 can be used to aspirate the medium and stone particles, and the sheath tube 210 and the first channel 111 are used to inject the medium, which is not limited here.

[0025] In the examples of this application, please continue to refer to Figure 4 , the orientation of the first opening 112 is the direction of the first section 110 close to the second section 120, and the second opening 113 is located on the side of the first opening 112 close to the distal end of the insertion portion 100. In a specific embodiment, the orientation of the first opening 112 and the orientation of the second opening 113 may be opposite. Of course, in some other cases, the orientation of the first opening 112 may intersect with the orientation of the second opening 113, that is, the central axis of the first opening 112 and the central axis of the second opening 113 intersect, and there is no restriction. When the second section 120 extends into the sheath 210, the first opening 112 can be connected to the fluid cavity 211 in the sheath 210 to achieve fluid circulation and docking, and the second opening 113 can act on the area near the distal end of the insertion portion 100. After the stone is broken up by laser at the distal end of the insertion part 100, the stone fragments can be quickly sucked into the second opening 113 and then discharged into the sheath 210 through the first opening 112. The sheath 210 can transport the stone fragments to the outside, thereby achieving efficient stone removal and avoiding the influence of stone residue on the treatment effect.

[0026] Please continue reading Figure 4The diameter of the first section 110 is greater than the diameter of the second section 120, and the first section 110 and the second section 120 are offset from each other. The first channel 111 is located on the side of the central axis of the first section 110 that is away from the central axis of the second section 120. The first section 110 and the sheath tube 210 cooperate with each other. For example, the cross-sections of the first section 110 and the sheath tube 210 are both circular, and the diameter of the first section 110 is equal to or slightly smaller than the inner diameter of the sheath tube 210. This allows the blocking area 116 of the first section 110 to closely abut the inner wall of the sheath tube 210, providing stable support and blocking. The offset of the first section 110 and the second section 120, coupled with the fact that the central axis of the first section 110 can coincide with or approximately coincide with the central axis of the sheath tube 210, enables the second section 120 to be relatively offset within the sheath tube 210. Due to the relative offset of the second section 120 within the sheath tube 210, a larger space is formed on the proximal side of the first channel 111 of the fluid lumen 211. This larger space is conducive to the smooth flow of the medium, can accommodate more fluid and stone particles, and improves the flow efficiency and processing capacity of the device during operation.

[0027] In the examples of this application, please refer to Figure 7 , the second opening 113 is opened on the outer peripheral surface of the first section 110, and the first channel 111 and the front end component 117 are distributed along the axial direction of the insertion part 100. This arrangement can make the second opening 113 located on the outer peripheral surface, which will not occupy the space of the front end component 117 at the distal end of the insertion part 100. In this way, the front end component 117 and the distal end of the insertion part 100 can maintain a compact layout, and more functional components can be installed. Or, under the configuration of the same front end component 117, the distal end of the insertion part 100 can be made smaller, which is more conducive to flexible operation in the complex environment inside the human body, while not affecting the normal operation of the second opening 113 and the stone suction function.

[0028] The proximal end of the front-end component 117 is provided with a cable, and the volume of the cable is small. The first channel 111 and the front-end component 117 are distributed along the axial direction of the insertion part 100. The first channel 111 occupies the space on the proximal side of the front-end component 117, avoiding the idle space on the proximal side of the front-end component 117, effectively optimizing the spatial arrangement of the insertion part 100, and reducing the volume of the insertion part 100. The volume reduction setting of the insertion part 100 also reduces the bending path of the insertion part 100, which makes the bending operation of the insertion part 100 more flexible and improves the operational feel. In addition, the volume of the first section 110 is smaller. In other words, the outer diameter of the first section 110 can be smaller than the inner diameter of the sheath tube 210, which is more convenient for insertion into the sheath tube 210 and avoids friction between the inner wall of the sheath tube 210 and the first section 110.

[0029] In a more specific embodiment, see Figure 7 as well as Figure 8, the first section 110 may include a curved section 114 and a front section 115, and the curved section 114 is connected to the distal end of the front section 115. The curved section 114 may be provided with a curved structure, such as a riveted snake bone, an integrated slit structure, etc., without limitation. For example, the riveted snake bone is formed by riveting a plurality of snake bones arranged in sequence, and the two adjacent snake bones can be rotated relative to each other to form a bending operation. In addition, the integrated slit structure is that the insertion part 100 is provided with a plurality of slits, and the plurality of slits are distributed equidistantly or unequally along the axis of the insertion part 100, and can be deformed around the slits to form a bending operation.

[0030] The first channel 111 is disposed within the curved section 114. Furthermore, the first channel 111 and the front assembly 117 are distributed axially along the insertion portion 100, reducing the volume of the insertion portion 100. This reduced volume also reduces the curvature of the insertion portion 100, making the bending operation of the insertion portion 100 more flexible and improving the user experience. Furthermore, the front assembly 117 is disposed within the front section 115, with the first channel 111 extending from the curved section 114 to the front section 115. This arrangement allows a portion of the second opening 113 to be located proximal to the front assembly 117, with the remainder located within the curved section 114. This structure allows the second opening 113 to be distributed across two regions. Compared to a single location proximal to the front assembly 117, the second opening 113 utilizes the distal space of the curved structure, effectively reducing the length of the front section 115. While maintaining effective stone aspiration, the curvature of the device during operation within the human body is reduced, minimizing the risk of damage to human tissue and improving operational convenience and safety.

[0031] In addition, since the first channel 111 and the front end component 117 are distributed axially along the insertion portion 100, the wall structure surrounding the second opening 113 can abut against the proximal end of the front end component 117, which can provide an axial limiting effect for the front end component 117, thereby preventing the front end component 117 from being misplaced and affecting the observation effect of the endoscope 1.

[0032] It is understandable that the second channel 130 may also extend to the outer circumferential surface of the first section 110, with the second opening 113 and the second channel 130 spaced apart from each other, so that the medium can flow from the second channel 130 to the second opening 113. The opening of the second channel 130 will not occupy the space of the front end assembly 117 at the distal end of the insertion portion 100, further reducing the distal size of the insertion portion 100 and improving the passage efficiency of the insertion portion 100. Alternatively, in some other cases, the second channel 130 extends to the end surface of the front end section 115, ensuring that the medium can act on the stone particles in front of the insertion portion 100 and ensuring that the range of action of the medium is within the observation range of the endoscope 1 without limitation.

[0033] In the axial direction of the first section 110, the end surfaces of the first opening 112 and / or the second opening 113 are inclined. Specifically, along the direction from the proximal end to the distal end of the first section 110, the first opening 112 is inclined toward the second channel 130. In another embodiment, along the direction from the proximal end to the distal end of the first section 110, the second opening 113 is inclined toward the direction away from the second channel 130. In yet another embodiment, the first opening 112 and the second opening 113 are inclined simultaneously. The impact force generated when the medium flows through the openings forces the first section 110 to move in the direction from the first channel 111 to the second channel 130, and the second section 120 moves accordingly, thereby creating a larger space on the proximal side of the first channel 111 in the second section 120, optimizing the fluid flow space and improving fluid transfer efficiency. In addition, the inclined first opening 112 and / or the second opening 113 can increase the axial size, thereby increasing the space therein, thereby improving the suction effect.

[0034] In the examples of this application, please refer to Figure 9 , the blocking area 116 may be provided with a sealing portion 1161, which may be a sealing ring, a sealing gasket, etc. In addition, the sealing portion 1161 may be integrally formed with the first section 110, or the sealing portion 1161 may be detachably connected to the first section 110, and the structure, material, and installation method of the sealing portion 1161 are not restricted. For example, in a more specific embodiment, the sealing portion 1161 can radially abut against the inner wall of the sheath tube 210. The sealing portion 1161 is a raised structure on the blocking area, and the sealing portion 1161 can radially abut against the inner wall surface of the sheath tube 210 so that the sheath tube 210 can be stably connected to the first section 110. The sealing portion 1161 can make the first section 110 and the sheath tube 210 cooperate with each other, and the sealing portion 1161 is used to block the gap between the first section 110 and the sheath tube 210. The sealing portion 1161 of the blocking area 116 cooperates with the sheath 210 to effectively block the gap between the first section 110 and the sheath 210, prevent fluid leakage, ensure the pressure stability of the fluid system when the device is working, ensure the normal operation of functions such as stone suction, and improve the reliability of the entire device.

[0035] It is understood that the arrangement of the first channel 111 and the front end assembly 117 along the axial direction of the insertion portion 100 can reduce the volume of the first section 110, thereby reducing the outer diameter of the first section 110 and facilitating the insertion of the first section 110 into the sheath tube 210. Furthermore, the sealing portion 1161 can be provided as a protrusion on the blocking region 116, and the outer diameter of the blocking region 116 can be larger than that of the curved section 114. The sealing portion 1161 can cooperate with the inner wall of the sheath tube 210, so that the sheath tube 210 can closely cooperate with the blocking region 116, thereby improving the suction effect.

[0036] In another embodiment, see Figure 10The inner wall of the sheath tube 210 is provided with a sealing structure 212, which seals and cooperates with the blocking area 116. For example, the sealing structure 212 is a protruding structure on the inner wall of the sheath tube 210. The inner diameter of the sealing structure 212 can be slightly smaller than or equal to the outer diameter of the first section 110. The sealing structure 212 can abut the surface of the blocking area to ensure a stable connection between the sheath tube 210 and the first section 110.

[0037] Of course, in another embodiment, please refer to Figure 11 as well as Figure 12 While the inner wall of the sheath tube 210 is provided with a closing structure 212, the blocking area 116 is provided with a sealing portion 1161, and the sealing portion 1161 can cooperate with the closing structure 212. Exemplarily, the closing structure 212 is a first protruding structure on the inner wall of the sheath tube 210, the first protruding structure extends along the circumference of the inner wall of the sheath tube 210, and a mounting groove is provided on the surface of the first protruding structure. The sealing portion 1161 is formed on a second protruding structure on the blocking area 116, and the second protruding structure extends along the circumference of the insertion portion 100. The second protruding structure can be embedded in the mounting groove, and the groove wall of the mounting groove can be tightly matched with the second protruding structure, so that the sealing portion 1161 can block the gap between the first section 110 and the sheath tube 210, ensuring that the negative pressure suction force in the fluid cavity 211 acts on the second opening 113, thereby improving the suction effect. In addition, when medical staff insert or remove the endoscope 1, the force can overcome the resistance between the first protruding structure and the second protruding structure, which does not affect the movement of the insertion part 100 and improves the operational flexibility of the insertion part 100.

[0038] To achieve the above-mentioned and other related purposes, the present application provides an endoscope 1, see Figure 2 The endoscope 1 includes the aforementioned insertion portion 100. This allows the endoscope 1 to have the beneficial effects of any of the aforementioned solutions, which will not be described in detail here. The endoscope 1 can be a bronchoscope, pyeloscope, esophagoscope, gastroscope, enteroscope, otoscope, rhinoscope, stomatoscope, laryngoscope, colposcope, laparoscope, arthroscope, etc. The embodiment of the present application does not specifically limit the type of endoscope 1.

[0039] In order to achieve the above-mentioned and other related purposes, the present application provides a negative pressure suction component 2, see Figure 13 The negative pressure suction assembly 2 includes the aforementioned endoscope 1 and a sheath 210. The insertion portion 100 is inserted into the sheath 210, forming a fluid lumen 211 between the second section 120 and the sheath 210. The blocking region 116 cooperates with the inner wall of the sheath 210 to block the fluid lumen 211. This allows the negative pressure suction assembly 2 to achieve the beneficial effects of any of the aforementioned solutions, which will not be further described here.

[0040] In the embodiment of the present application, the inner wall of the sheath tube 210 is provided with a sealing structure 212, which is sealed and cooperated with the blocking area 116. The inner wall of the sheath tube 210 is provided with a sealing structure 212, which is sealed and cooperated with the blocking area 116. Exemplarily, the sealing structure 212 is a protruding structure on the inner wall of the sheath tube 210. The inner diameter of the sealing structure 212 can be slightly smaller than or equal to the outer diameter of the first section 110. The sealing structure 212 can abut the surface of the blocking area to ensure a stable connection between the sheath tube 210 and the first section 110.

[0041] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0042] Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0043] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. An insertion portion suitable for an endoscope, characterized in that: include: a first section, wherein the first section is provided with a front end assembly and further defines a first channel, wherein the first channel has a first opening and a second opening distributed axially along the insertion portion; a peripheral wall of the first section is provided with a blocking area, wherein the blocking area is located between the first opening and the second opening, and when at least a portion of the first section is within the sheath tube, the blocking area cooperates with the inner wall of the sheath tube to isolate a fluid channel between the sheath tube and the insertion portion; as well as a second segment connected to a proximal end of the first segment; Wherein, the inserting portion further includes a second channel running through the first section and the second section.

2. The insertion portion according to claim 1, wherein The first opening is oriented in a direction of the first section close to the second section, and the second opening is located on a side of the first opening close to the distal end of the insertion portion; And / or, the diameter of the first section is greater than the diameter of the second section, and the first section and the second section are off-axis, and the first channel is located on a side of the central axis of the first section away from the central axis of the second section.

3. The insertion portion according to claim 2, wherein: The second opening is formed on the outer peripheral surface of the first section, and the first channel and the front end component are distributed along the axial direction of the insertion portion.

4. The insertion portion according to claim 3, wherein: The first section includes a curved section and a front end section, the curved section is connected to the distal end of the front end section, the front end component is arranged in the front end section, and the first channel extends from the curved section to the front end section so that part of the second opening is opened at the proximal end of the front end component and the remaining part is opened in the curved section.

5. The insertion portion according to claim 1, wherein: In the axial direction of the first section, end surfaces of the first opening and / or the second opening are arranged inclined.

6. The insertion portion according to claim 1, wherein: The blocking area is provided with a sealing portion, the sealing portion cooperates with the sheath tube, and the sealing portion is used to block the gap between the first section and the sheath tube.

7. The insertion portion according to claim 6, wherein: The sealing portion can radially abut against the inner wall of the sheath tube.

8. An endoscope, characterized in that: The invention comprises the inserting portion according to any one of claims 1 to 7.

9. A negative pressure suction component, characterized in that: It comprises the endoscope and sheath as described in claim 8, the insertion portion is inserted into the sheath, a fluid cavity is formed between the second section and the sheath, and the blocking area cooperates with the inner wall of the sheath to isolate the fluid cavity.

10. The negative pressure suction component according to claim 9, characterized in that: The inner wall of the sheath is provided with a sealing structure, and the sealing structure and the blocking area are sealed with each other.

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