Insertion part, endoscope and suction system

Abstract

The invention provides an insertion part, an endoscope and a suction system, and relates to the technical field of endoscopes, the insertion part comprises a tube body, the tube body is provided with a first fluid channel, and the tube body is used for being inserted into a sheathing canal; the second fluid channel is arranged in the axial direction of the tube body, a far port of the second fluid channel is adjacent to a far port of the first fluid channel, and a near port of the second fluid channel is used for being communicated with a sheath tube; the driving part is connected with the second fluid channel and used for driving the second fluid channel to deform in the radial direction of the tube body, and therefore the radial size and the corresponding section flow area of the second fluid channel are adjusted. Friction between the outer wall of the ureter and the inner wall of the ureter can be effectively reduced, mucous membranes are prevented from being pressed or torn, and therefore the risk of postoperative bleeding, infection and the like is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to an insertion portion, an endoscope, and a suction system. Background Art

[0002] Holmium laser lithotripsy is a minimally invasive surgical procedure commonly used to treat urinary stones. It primarily uses laser energy to break up stones and, combined with negative pressure or drainage, removes the stone fragments from the body. During conventional holmium laser lithotripsy, the doctor typically inserts the ureteroscope sheath (also known as a ureteral sheath) into the ureteral opening at the renal calyx. The distal end of the endoscope passes through the sheath into the renal calyx cavity, where stones in the upper, middle, and lower calyces are individually pulverized by laser. The crushed particles are typically guided out of the body through the gap between the sheath and the endoscope insertion portion using negative pressure suction.

[0003] However, in existing technologies, if the sheath tip is only placed at the ureteral opening for suction, due to the limited range of negative pressure and the long suction transmission path, a large number of small stones may still remain in the renal calyx cavity, resulting in low stone removal efficiency and possible complications such as postoperative stone recurrence. To improve lithotripsy efficiency, doctors often extend the sheath tip further into the renal calyx along the insertion point of the endoscope during surgery, bringing the sheath tip closer to the target stone area, thereby enhancing the local negative pressure suction capacity and improving lithotripsy effectiveness.

[0004] During the research, the inventors found that when the sheath penetrates deep into the ureter or even the renal calyx cavity, the outer wall of the sheath is in contact with the inner wall surface of the ureter, and the two slide relative to each other during the operation of the endoscope insertion part, which can easily cause the ureteral mucosa to be compressed, rubbed or even torn, thereby causing damage to the ureteral wall and increasing the risk of complications such as postoperative bleeding and infection. Summary of the Invention

[0005] The purpose of this application is to provide an insertion portion, an endoscope and a suction system to solve the above-mentioned technical problems existing in the prior art.

[0006] In a first aspect, the present application provides an inserting portion, which adopts the following technical solution: An insertion portion is applied to an endoscope, the insertion portion comprising: a tube body having a first fluid channel, and configured to be inserted into the sheath tube; a second fluid channel, the second fluid channel being arranged along the axial direction of the tube body, the distal end of the second fluid channel being arranged adjacent to the distal end of the first fluid channel, and the proximal end of the second fluid channel being arranged for communication with the sheath tube; A driving member is connected to the second fluid channel and is used to drive the second fluid channel to deform along the radial direction of the tube body, thereby adjusting its radial size and corresponding cross-sectional flow area.

[0007] In a second aspect, the present application provides an inserting portion, which adopts the following technical solution: An endoscope comprises the insertion portion described in the above solution.

[0008] In a third aspect, the present application provides a suction system, which adopts the following technical solution: A suction system comprises the endoscope described in the above solution, wherein the insertion portion is located inside the sheath.

[0009] The present invention has the following advantages and beneficial effects: (1) The present invention installs a second fluid channel on the tube body and controls its radial deformation by a driving member, so that the second fluid channel has the ability to flexibly adjust the opening size according to clinical needs, thereby achieving a balance between the channel function and the size of the insertion portion. In actual use, the design of this structure has the following advantages: First, the distal end of the second fluid channel is positioned adjacent to the distal end of the first fluid channel, placing it near the renal calyx. When the flushing fluid ejected from the first fluid channel impacts the stones, loosened or broken stones are more easily directed to the distal end of the second fluid channel, allowing them to be promptly aspirated and removed from the body, thereby effectively improving the efficiency of lithotripsy.

[0010] Secondly, when the sheath is about to enter a narrow area such as the ureter or renal calyx cavity, the second fluid channel is tightly attached to the outer wall of the tube body when it is not opened, and will not significantly increase the overall outer diameter of the insertion part, effectively reducing the frictional contact between the insertion part and the inner wall of the ureter or renal calyx during insertion, reducing the risk of mucosal compression and tearing due to squeezing, scraping, etc., and helping to reduce the occurrence of complications such as postoperative bleeding and infection.

[0011] Thirdly, the second fluid channel can be expanded or contracted as needed with the help of a driving member, so that the channel can be in a folded state when not in use, reducing the size of the device; when lithotripsy or auxiliary suction is required, the driving member is used to expand it to form an effective channel, taking into account both operational flexibility and structural compactness.

[0012] In summary, the present application not only significantly improves the efficiency of removing gravel, but also effectively reduces the risk of damage to patient tissues, thereby improving the safety of surgery and the adaptability of endoscopic insertion operations through the radially adjustable second fluid channel on the tube body and reasonable coordination with the first fluid channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 It is a schematic diagram to show the usage status of endoscope and sheath.

[0015] Figure 2 is a schematic diagram intended to illustrate an endoscope and sheath.

[0016] Figure 3 It is a structural schematic diagram intended to show that the wall portion is expanding in the radial direction.

[0017] Figure 4 yes Figure 3 Enlarged view of part A.

[0018] Figure 5 This is a structural diagram intended to illustrate the installation position of the wall portion.

[0019] Figure 6 It is a structural schematic diagram intended to show that the wall surface is contracted in the radial direction.

[0020] Figure 7 yes Figure 6 Magnified view of part B.

[0021] Figure 8 This is a schematic diagram showing the interior of the wall section and the structure of the installation pipes.

[0022] Figure 9 It is a schematic diagram intended to show the structure of the wall portion as a deformation ring.

[0023] Figure 10 This is a structural diagram intended to show that the driving member is a capsule, and the capsule is located at the lower side of the wall surface.

[0024] Figure 11 This is a structural diagram intended to show that the driving member is a capsule, and the capsule is located on both sides of the inner wall surface.

[0025] Figure 12 The diagram is intended to show that the insertion portion of the present application is extended into the kidney, and the wall portion is in a working state, that is, radially expanded.

[0026] Figure 13 The diagram is intended to illustrate the state in which an insertion portion and a sheath are extended into the kidney to aspirate stones in the related art.

[0027] The following are marked in the figure: 100. Insertion part; 110. Tube body; 1101. First fluid channel; 111. Passive bending section; 112. Active bending section; 113. Lens mount; 114. Instrument tube; 200. Wall portion; 221. Second fluid channel; 230. First plate; 231. Folding portion; 232. Elastic member; 240. Second plate; 250. Deformation ring; 300. Driving member; 310. Pull rope; 311. Mounting tube; 320. Capsule; 400. Sheath; 500. Handle; 600. Kidney; 610. Renal calyx; 700. Stone; P. Liquid suction direction. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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".

[0031] In the minimally invasive treatment of urinary stones, holmium laser lithotripsy has become one of the mainstream clinical methods due to its efficient stone crushing ability and good tissue selectivity. During the operation, doctors often use ureteroscope with sheath to guide the laser to the 700 position of the stone for lithotripsy, and use a negative pressure device to drain the stone residue. However, in clinical practice, referring to Figure 13As shown, the inventors found through a large number of intraoperative observations and postoperative reviews that in the traditional scheme, if the sheath is only left at the ureteral opening, referring to the liquid suction direction P, the negative pressure suction path is long and the suction force is dispersed, which often cannot completely remove the residual gravel located deep in the renal calyx 610, affecting the completeness of the stone removal.

[0032] In order to improve the efficiency of lithotripsy, some operations will attempt to insert the sheath further into the renal calyx 610 cavity of the kidney 600, close to the lithotripsy site to enhance the negative pressure suction effect. However, this operation has caused new technical problems in practice: the inventors noticed that when the sheath 400 penetrates deep into the renal calyx 610, there is continuous contact between its outer wall and the inner wall of the ureter or the wall of the renal calyx 610. During the process of adjusting, operating or removing the insertion part of the endoscope during surgery, there is often repeated sliding between the sheath and the tissue in the body, which can easily cause local mucosal squeezing, pulling and friction. Once the operation is improper or too much force is applied, it is very likely to cause damage to the cavity mucosa, manifested as bleeding, edema or even tearing, which increases the burden of postoperative recovery for patients and even induces secondary infection.

[0033] Based on the above problems, the inventors focused on an in-depth analysis of the causes of residual lithotripsy and tissue damage caused by the penetration of the sheath, and proposed a new structural design that takes into account both lithotripsy efficiency and tissue protection, in order to optimize the layout of the intraoperative suction channel and the power transmission path, fundamentally improving surgical safety and lithotripsy effects.

[0034] The following combination Figures 1 to 13 An insertion portion, an endoscope, and a suction system provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0035] An insert portion is used in an endoscope. The insert portion 100 includes a tube body 110, and the tube body 110 has a first fluid channel 1101. In actual products, the first fluid channel 1101 is actually a channel inside the instrument tube 114. Of course, this application is not limited to the channel of the instrument tube 114. It can also be a fluid channel independently installed in the insert portion 100, for example, it can be a thin tube attached to the inside or outside of the tube body 110 by bonding or embedding. This channel can be used to guide liquid, gas or other medical media to meet the needs of different surgical scenarios. Of course, in this embodiment, the purpose of the first fluid channel 1101 is to spray liquid to flush stones.

[0036] It should be noted that in the description of this embodiment, the "tube body 110" corresponds to the "insertion portion 100" of the endoscope in actual structure. That is, the tube body 110 constitutes the main part of the insertion portion 100. The two can be regarded as the same structure in this application to facilitate unified description in the subsequent description. Of course, in other embodiments, the tube body 110 can also be used independently as the insertion portion 100, that is, as a whole as a component unit of the insertion portion 100, depending on the specific design requirements.

[0037] The tube body 110 is inserted into the sheath 400. Specifically, during surgery, the sheath 400 is first inserted into the body cavity, and then the insertion portion 100 of the endoscope is inserted into the sheath 400. The sheath 400 is typically a hollow outer tube with a certain degree of rigidity and bending resistance. It has good biocompatibility and flexibility, and can reduce tissue irritation when passing through natural human cavities or artificial incisions. The sheath 400 is typically designed with a connector at the proximal end for connecting to a negative pressure device and a fluid passage.

[0038] The sheath 400 is mainly used to guide the insertion part 100 to the target body cavity area, such as the renal calyx, ureter or bladder cavity, and provide protection to reduce friction damage to the tissue during the insertion process. At the same time, during the intraoperative working stage, the sheath 400 also serves as an auxiliary pipeline for suction and drainage. There is a certain annular space between its inner wall and the tube body 110 of the insertion part 100, which can be used for the circulation of liquid and gravel. Specifically, during surgical procedures such as lithotripsy, after the stones are broken up by laser crushing or ultrasonic lithotripsy, they will enter the negative pressure channel through the annular space with the flow of perfusion fluid and eventually be drained to the extracorporeal collection system.

[0039] The second fluid channel 221 is arranged along the axial direction of the tube body 110, and the distal end of the second fluid channel 221 is arranged adjacent to the distal end of the first fluid channel 1101, and the proximal end of the second fluid channel 221 is used to connect with the sheath tube 400. This structure ensures the synchronization of irrigation and suction, which is conducive to establishing a stable fluid circulation system. It is worth noting that in application, the first fluid channel 1101 is generally used to spray liquid to flush the body cavity or lens area, while the second fluid channel 221 cooperates with the negative pressure pump system to suck away the irrigation liquid and debris. However, in specific application scenarios, the functions of the two channels can be replaced or coordinated with each other without limitation.

[0040] The driver 300 is connected to the second fluid channel 221 and is used to drive the second fluid channel 221 to deform radially along the tube body 110, thereby adjusting its radial dimension and corresponding cross-sectional flow area. This driver structure can adjust the channel size in real time according to surgical needs, improving suction efficiency or reducing external resistance. For example, when rapid aspiration of effusion is required, the channel can be expanded to increase the cross-sectional area, while when passing through constricted tissue, the channel can be contracted to reduce the diameter of the tube body 110.

[0041] Specifically, the insertion portion 100 also includes a wall portion 200, which is installed in the front end area of the tube body 110. The wall portion 200 can form a second fluid channel 221 between the tube body 110 or its own wall surface. The wall portion 200 is usually made of a flexible elastic material, such as medical silicone, polyurethane film or shape memory polymer, and can be deformed in a controllable manner in a spatially confined environment, thereby giving the second fluid channel 221 a certain degree of flexibility and adjustment ability, so that it has the ability to adapt to different cavity shapes. The setting of the wall portion 200 gives the second fluid channel 221 a flexible structure, which is particularly suitable for operation in complex or narrow body cavities, is conducive to adapting to the complex structure of the body cavity and preventing interference with tissues due to hard components, while reducing the risk of friction irritation and tissue damage during surgery.

[0042] Furthermore, the setting position of the wall portion 200 can be flexibly adjusted according to actual application requirements. It can be arranged in the front end area of the insertion portion 100 to be close to the lens area for precise suction, or it can be extended to the middle or tail section of the passive bending section 111 or the active bending section 112 to cover a larger area of the suction path to meet the spatial layout requirements and drainage efficiency requirements in different surgical procedures.

[0043] As a preferred design direction, the wall portion 200 can be naturally retracted during insertion, thereby reducing the overall radial dimension of the insertion portion 100, facilitating smooth passage through narrow or tortuous passageways, and improving the smoothness and controllability of intraoperative advancement. After insertion into the target area, the driving member 300 acts to expand the wall portion 200, allowing its outer contour to conform to the inner wall of the sheath 400. This creates a larger annular suction channel between the tube body 110 and the sheath 400, enhancing negative pressure suction capacity, effectively expelling gravel particles and perfusion fluid, and improving stone removal efficiency and intraoperative visual clarity.

[0044] In addition, the wall portion 200 can be structurally designed to have a preset limit opening angle or maximum radial dimension, thereby achieving controllability of the channel cross-section. Even under tissue compression or a narrow surgical field of view, an effective liquid flow cross-section can be maintained to prevent a decrease in suction efficiency due to excessive deformation.

[0045] It is worth noting that the material selected for the wall portion 200 must provide the necessary support during radial deformation to prevent channel collapse without affecting the normal operation of the active bending section 112. In addition, to enhance its structural stability, a certain amount of fiber reinforcement mesh or localized reinforcement ribs can be embedded in the material.

[0046] As an optional embodiment, the wall surface of the wall portion 200 that contacts the inner wall of the sheath tube 400 after expansion can be coated with a material having a certain degree of mutual adhesion, such as a slightly sticky silicone layer, a medical pressure-sensitive adhesive layer, or a shape-memory composite coating, to achieve stable adhesion to the inner wall of the sheath tube 400 after the wall portion 200 is expanded. This adhesion layer not only increases the friction between the wall portion 200 and the sheath tube 400, preventing problems such as loose adhesion and disturbance of the suction path due to fluid disturbance or tissue displacement during the suction process, but also further prevents the channel from partially collapsing or curling under the action of negative pressure, which could affect the flow cross-section and suction efficiency.

[0047] As an optional embodiment, either the inner or outer wall of the wall portion 200 can be coated with a lubricating layer, such as a hydrophilic coating, silicone coating, or polytetrafluoroethylene coating. These lubricating layers can significantly reduce insertion resistance during insertion, preventing high-friction contact between the wall portion 200 and the sheath 400 or the body cavity wall. They can also reduce tissue adhesion and gravel deposition during aspiration, improving the smoothness and cleanliness of the overall device operation. Furthermore, these lubricating layers exhibit a certain degree of resistance to contamination and liquid residue, facilitating postoperative cleaning and reuse of the instrument.

[0048] As an optional embodiment, the distal end of the wall portion 200 can be configured to have a certain inclination angle, such as upward, leftward, or rightward, to accommodate different cavity morphologies or adjust the suction direction, thereby improving the guidance of liquid or debris to the target area. In actual structures, this inclination angle can be achieved through mold forming, subsequent hot pressing, or other processing methods. It can also be customized according to the needs of the specific body cavity region, and is not specifically limited in this application.

[0049] Furthermore, to enhance cavity contact safety and reduce mechanical irritation to tissues from the distal end of the wall portion 200, a flexible material layer, such as a medical silicone gasket, foam layer, or soft rubber edge strip, can be integrated or attached to the distal end of the wall portion 200 through bonding or interlocking. This cushions the contact pressure of the wall edge on the body cavity tissue, preventing complications such as tissue scraping, indentation, and even bleeding caused by positioning deviation or sudden expansion. This flexible structure also helps accommodate minor irregularities in the cavity wall, improving overall fit and suction sealing.

[0050] In other optional solutions, the structural edge of the wall portion 200 can also be provided with rounded transitions, flange limit rings or arc-shaped reinforcement ribs to further enhance its stability and deformation resistance in the expanded state, and avoid adverse working conditions such as warping, tearing or shape loss.

[0051] It should be emphasized that when selecting the material for the wall portion 200, both flexible deformation capability and structural stability must be taken into consideration to ensure that no restraining effect is produced when the active bending section 112 of the insertion portion 100 undergoes multi-dimensional deformation. At the same time, no local collapse or indentation occurs when the channel is expanded and in the suction working state, thereby ensuring the patency and continuity of the suction.

[0052] Reference Figure 4 Specifically, the wall portion 200 includes a first plate 230, which is arcuate and can be retracted or expanded by the driver 300 to conform to the outer contour of the outer wall of the tube body 110 or along the inner contour of the inner wall of the sheath 400. This structure rapidly expands when the suction channel function is activated and automatically retracts when space is limited or the channel is not in use. This dynamic conformity ensures that the insertion portion 100 always maintains good fluid flow and movement flexibility.

[0053] The first plate 230 is integrally formed with a folded portion 231 along its circumference. This portion 231 is constructed from a material with a certain degree of elasticity, such as polyester film or silicone corrugated membrane. The elasticity should be moderate to prevent rebound when collapsed, impacting adhesion. The folded portion 231 is smooth and flat when the first plate 230 is extended radially along the tube 110. When collapsed, it assumes a naturally folded state, ensuring continuous and smooth wall deformation without causing localized abrupt changes or blockages.

[0054] As an optional embodiment, the wall portion 200 further includes a second plate 240. The second plate 240 and the first plate 230 enclose a second fluid channel 221. The second plate 240 covers at least a portion of the outer wall of the tube body 110. The cavity between the first plate 230 and the second plate 240 forms a deformation region under the action of the driving member 300. A flexible reinforcement ring or support ribs can be provided within the cavity to maintain structural stability in the expanded state and prevent local collapse.

[0055] One of the structural advantages of the second plate 240 is that it effectively avoids the potential sealing issues that might arise from a second fluid channel 221 formed directly between the first plate 230 and the outer wall of the insert 100. Because the first plate 230 requires significant deformation to achieve radial contraction and expansion, directly forming a fluid channel between it and the insert 100 could create the risk of leakage or channel discontinuity due to unstable fit during dynamic deformation or suction.

[0056] As an optional embodiment, refer to Figure 4 As shown, after the first plate body 230 is expanded and deformed in the radial direction, the cross-section of the second fluid channel 221 formed together with the second plate body 240 is an incomplete annular hollow structure, and the two ends of the second fluid channel 221 gradually shrink and become eagle-beak-shaped. The design of this shape is conducive to generating a drainage acceleration effect at the channel outlet, improving the suction efficiency, and preventing foreign matter from getting stuck or blocked. The incomplete annular channel shape can form a certain lateral thrust on the main body of the insertion part 100 when the wall surface part 200 is expanded, so that the insertion part 100 is biased toward one side of the inner cavity of the sheath tube 400, and plays a certain limiting role on the insertion part 100, so that the space of the second fluid channel 221 is more fully utilized and the cross-sectional area is larger, thereby improving the patency of suction.

[0057] As an optional embodiment, the first plate 230 and the second plate 240 can be manufactured separately and connected and fixed by splicing during subsequent assembly. Specifically, the first plate 230 primarily functions to open and close the fluid channel and must repeatedly undergo significant radial deformation during operation. Therefore, it is preferably made of a highly flexible elastic material that can be repeatedly folded and deformed, such as a TPU film, a silicone film, or a shape-memory elastic composite material.

[0058] The second plate 240 primarily serves as a stable support structure, encasing and supporting the tube 110 and defining the channel's shape. Because it primarily provides structural stability and anti-collapse capabilities, it is preferably constructed from materials with low elasticity and slightly greater rigidity, such as modified polyimide sheets, high-density PE films, or hot-pressed polyurethane sheets. This differentiated material design maximizes the performance of each of the two functional modules, enhancing the channel's dynamic responsiveness and stability. Regarding structural connection, the first and second plates 230 and 240 can be joined using a variety of methods, including but not limited to bonding, snap-fit connections, welding, or hot pressing.

[0059] Furthermore, in some embodiments requiring a high degree of process integration, the first and second plates 230 and 240 may also be manufactured using an integrated molding process. For example, through multi-stage composite extrusion or dual-injection molding, materials with different performance characteristics can be molded in a mold at one time, forming a monolithic structure that includes both flexible, deformable components and rigid support components. This reduces assembly steps and improves sealing and reliability, making it particularly suitable for high-end minimally invasive medical device systems. Whether the first and second plates 230 and 240 are manufactured separately or as an integrated unit can be flexibly selected based on the application scenario, cost control, and performance requirements.

[0060] In another embodiment, the wall portion 200 may utilize a deformable ring 250. The deformable ring 250, in the form of a belt or ring, is attached to the outer wall of the tube body 110 and can be made from a shape memory alloy or pre-bent elastic steel wire. When acted upon by the driver 300 or the medium, the deformable ring 250 gradually increases or decreases its contact area with the tube body 110, thereby controlling the cross-sectional dimensions of the second fluid channel 221. This type of deformable ring 250 is suitable for applications requiring high responsiveness and repeatable deformable control. Its compact structure and precise control make it suitable for a variety of surgical procedures.

[0061] As an optional embodiment, the circumferential length of the second plate 240 is greater than half the outer circumference of the tube 110, forming a "semi-wrapped" structure, which facilitates secure fixation via edge snap-fit structures, adhesive layers, or screw mountings. This multi-point fixation not only strengthens the connection with the tube 110 but also effectively prevents the plate from shifting, tilting, or falling off due to external forces during vacuum suction or surgical procedures, thereby maintaining the stability and sealing of the channel structure.

[0062] Furthermore, the folding portions 231 are preferably symmetrically arranged at both ends of the first plate 230, making the deformation process more stable and balanced, effectively preventing eccentric or torsional deformation during expansion. Furthermore, this symmetrical design allows the first plate 230 to more closely conform to the contours of the tube 110 when collapsed, reducing its overall size. This provides greater adaptability and lowers operational risk when traversing narrow cavities, oblique paths, or anatomical structures with curved angles.

[0063] As an optional embodiment, the driving member 300 includes any one of the following two modes: Structure of the traction rope 310: The traction rope 310 is preferably made of a medical-grade polyester fiber braided material with high strength and good flexibility. It has the properties of tensile resistance, fatigue resistance, corrosion resistance, etc., and is suitable for long-term operation environments in the body. The fixed end of the traction rope 310 is connected to the wall portion 200, and is preferably arranged at multiple axial positions of the first plate 230, in a divergent and symmetrical distribution, so as to achieve uniform retraction of the wall portion 200 during traction, and avoid local deformation or distortion of the wall portion 200 caused by single-point pulling. The traction end is passed through the interior of the tube body 110, extends along the lumen to the proximal area of the insertion portion 100, and is connected to a control mechanism provided on the handle 500, such as a slider-type cable adjustment structure, a rotary tension mechanism, a gear-ratchet positioning mechanism, etc., so that the operator can complete precise control with one hand.

[0064] In terms of installation design, the collection area of the traction rope 310 can be preset with a traction path groove or a guide hole or an installation tube 311 (such as Figure 8(as shown), preventing wire pulls from interfering with other functional components of the insertion section 100, such as the fiber bundle and catheter, thereby improving wiring clarity and reliability. During the retraction operation, the operator adjusts the traction cord 310 using the handle 500, causing the wall portion 200 to retract and adhere to the surface of the tube body 110. This reduces the overall radial dimension and facilitates smooth passage through narrow body cavities. Upon releasing the traction cord 310, the wall portion 200 automatically expands, leveraging its own elasticity or the action of a resilient member 232 (e.g., a flexible spring or spring), forming the desired suction channel. This provides simple operation and rapid response.

[0065] The structure of the capsule 320: The capsule 320 is made of a thin film material with good deformation performance and biocompatibility, such as medical silicone film, double-layer TPU film, etc., preferably a pressure-resistant multi-cavity thin-walled airbag structure. Figure 11 and Figure 12 As shown, the sac 320 can be positioned in the lower area of the wall portion 200, within the internal hollow structure, or within the interlayer between the first plate 230 and the second plate 240. It can also be symmetrically positioned on both sides of the wall portion 200 to provide bidirectional symmetrical support. In actual use, a control device located at the proximal end of the insertion portion 100 can be used to inject gas, saline, or other medical fluid into the sac 320, causing it to expand and push the wall portion 200 outward. After the fluid is withdrawn, the sac 320 contracts under the assistance of external force or a resetting member (such as an elastic support sheet), thereby driving the wall portion 200 back to a position close to the tube body 110.

[0066] The control medium of balloon 320 can be connected to an external syringe pump, peristaltic pump, or other equipment via a thin-diameter catheter. Safety mechanisms such as a one-way valve and a pressure-limiting valve are incorporated to ensure stable gas injection and controllable deployment of wall portion 200. Furthermore, balloon 320 is suitable for surgical scenarios requiring high flexibility, particularly when the position of active bending section 112 has minimal impact on the movement of tube body 110, providing a suitable structural supplement.

[0067] Of course, in other embodiments, the drive element 300 may also utilize a shape memory alloy wire (such as a nickel-titanium alloy wire) or other electrically driven structures, without limitation. When heated (e.g., energized), the alloy wire rapidly contracts, driving the wall portion 200 to collapse. Upon cooling after power is removed, the wire returns to its original shape, causing the wall portion 200 to expand again. The arrangement of the alloy wire, combined with the folding portion 231 of the wall portion 200, enables multi-point traction control, offering fast response times and high control precision, making it suitable for delicate procedures such as laparoscopic surgery and soft tissue manipulation.

[0068] The specific structure of the tube body 110 is as follows: from the proximal end to the distal end, the tube body 110 includes a passive bending section 111, an active bending section 112, and a lens mount 113. The proximal end of the wall portion 200 is disposed on the passive bending section 111 or the active bending section 112, and the distal end of the wall portion 200 is disposed on the distal side of the active bending section 112 or on the lens mount 113. The active bending section 112 generally includes multiple flexible joints and control ropes, enabling multi-dimensional directional adjustment; the passive bending section 111 is a structurally stable region, suitable for serving as a fixed support area for the wall portion 200.

[0069] As a preferred embodiment, the traction rope 310 preferably enters the insertion portion 100 in the passive bending section 111. This is because the passive bending section 111 is typically constructed of a higher-rigidity coating material or support member than the active bending section 112, resulting in greater structural stability and anti-interference capabilities. The bending behavior in this area is independent of the control rope of the active bending section 112, thus providing more space for structural integration and more flexible layout.

[0070] Specifically, positioning the traction rope 310 in this area fully utilizes the relatively large cavity within the passive bending section 111, facilitating the proper routing and avoidance of the traction rope 310 with other functional components (such as the optical fiber bundle, guidewire channel, and drainage tube), thereby reducing physical interference. Furthermore, positioning the traction rope 310 in this location further facilitates maintaining a linear and stable pulling path. When driving the wall portion 200, this reduces the risk of force hysteresis or deflection caused by narrow space or excessive bending, thereby improving control sensitivity and repeatability.

[0071] In addition, since the passive bending section 111 itself does not participate in the fine posture control of the front end of the endoscope, placing the entry point of the traction rope 310 here also helps to reduce interference with the control accuracy of the active bending section 112, and avoid the tension or stroke changes of the traction rope 310 affecting the precise operation of the end of the insertion part 100.

[0072] As a preferred embodiment, the proximal end of the wall portion 200 is installed in the area of the passive bending section 111, effectively avoiding interference with the movement of the active bending section 112 and not affecting the fine control performance of the front end of the insertion portion 100. At the same time, this layout method also frees up sufficient space for the layout of the drive mechanism, facilitating integrated design and assembly operations.

[0073] The present application also provides an endoscope, referring to Figure 1 、 Figure 2As shown, the endoscope includes the insertion section 100 described in the above embodiment. The insertion section 100 is one of the core components of the endoscope, located at the front end of the endoscope. It can be inserted into the patient during body cavity examinations or surgical procedures to perform image acquisition, irrigation, aspiration, and other operations. The insertion section 100 has a compact overall structure and comprises, in sequence, a passive bending section 111, an active bending section 112, and a lens mount 113, enabling multi-angle bending adjustment and end-stage visual observation.

[0074] The insertion portion 100 comprises a wall portion 200 and a second fluid channel 221. The wall portion 200 is controlled by a driver 300 to deform, enabling dynamic adjustment of the second fluid channel 221. Without affecting the insertion process, the insertion portion 100 can be retracted or expanded as needed during surgery, thereby creating and releasing the suction channel and facilitating the removal of stones 700. This design enhances the endoscope's adaptability to diverse surgical procedures and is particularly suitable for surgical environments with complex body cavities and limited space.

[0075] Further, refer to Figure 12 As shown, the present application also provides a suction system, including a sheath 400 and the endoscope described in the above embodiment. In the suction of stones, the insertion part 100 is used in the sheath 400. The sheath 400 is usually inserted into the body cavity first to provide a guide path and mechanical protection for the endoscope insertion part 100. It has a certain rigidity and bending resistance, which can effectively reduce the friction between the insertion part 100 and the body cavity tissue, thereby reducing damage to the mucosa or tissue during the operation. The insertion part 100 is introduced into the body cavity through the sheath 400, and a gap area is formed between its outer wall and the inner wall of the sheath 400, which is used as a suction path to facilitate the negative pressure suction of stone debris, effusion, etc. to the outside of the body through the gap.

[0076] During use, when the insertion portion 100 enters the sheath 400 and reaches a predetermined position, the operator can control the driving member 300 to expand the wall portion 200 so that it adheres to the inner wall of the sheath 400, forming an unobstructed second fluid channel 221, and the flushing liquid is ejected from the instrument tube 114, that is, the first fluid channel 1101. The specific direction of the liquid suction P is as follows: Figure 12 By controlling the deformation degree of the wall portion 200, the cross-sectional size of the suction channel can be flexibly adjusted, thereby improving the negative pressure suction efficiency, ensuring that gravel, blood or other tissue fluids can be discharged smoothly, and avoiding lumen blockage.

[0077] It should be noted that the endoscope referred to in the embodiments of the present application may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not impose any specific restrictions on the type of endoscope.

[0078] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0079] 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 (100), applied to an endoscope, characterized in that: The inserting portion (100) comprises: A tube body (110), the tube body (110) having a first fluid channel (1101), the tube body (110) being configured to be inserted into the sheath tube (400); a second fluid channel (221), the second fluid channel (221) being arranged along the axial direction of the tube body (110), the distal end of the second fluid channel (221) being arranged adjacent to the distal end of the first fluid channel (1101), and the proximal end of the second fluid channel (221) being arranged for communication with the sheath tube (400); A driving member (300) is connected to the second fluid channel (221) and is used to drive the second fluid channel (221) to deform along the radial direction of the tube body (110), thereby adjusting its radial size and corresponding cross-sectional flow area.

2. The insertion portion according to claim 1, wherein The inserting portion (100) further comprises a wall portion (200), wherein the wall portion (200) is arranged at the front end region of the tube body (110), and the wall portion (200) can form the second fluid channel (221) between the wall portion (200) and the tube body (110) or on its own wall surface.

3. The insertion portion according to claim 2, wherein: The wall portion (200) includes a first plate (230), which is arranged in an arc shape and can be retracted or expanded under the drive of the driving member (300) to be close to the outer contour surface of the outer wall of the tube body (110) or arranged along the inner contour surface of the inner wall of the sheath tube (400).

4. The insertion portion according to claim 3, wherein: The first plate body (230) is provided with a folding portion (231) along its circumferential direction. The folding portion (231) is flat and smooth when the first plate body (230) is stretched out along the radial direction of the tube body (110), and is folded when the first plate body (230) is retracted along the radial direction of the tube body (110).

5. The insertion portion according to claim 4, wherein: The wall portion (200) further includes a second plate (240), wherein the second plate (240) and the first plate (230) enclose the second fluid channel (221), and the second plate (240) covers at least a portion of the outer wall of the tube (110).

6. The insertion portion according to claim 5, wherein: After the first plate (230) is expanded and deformed in the radial direction, the cross section of the second fluid channel (221) formed together with the second plate (240) is an incomplete annular hollow structure, and both ends of the second fluid channel (221) gradually shrink and form an eagle's beak shape; And / or, the length of the second plate (240) covered along the circumferential direction of the tube (110) is greater than half the circumference of the outer wall of the tube (110); And / or, the folding portion (231) is provided at both ends of the first plate body (230) along the circumferential direction.

7. The insertion portion according to any one of claims 2 to 6, characterized in that: The driving member (300) includes any one of the following two modes: The driving member (300) includes a traction rope (310), a fixed end of the traction rope (310) is connected to the wall portion (200), and a traction end of the traction rope (310) extends toward the proximal end of the tube body (110); When the traction end is pulled, the traction rope (310) can drive the wall portion (200) as a whole to be close to the tube body (110); when the traction rope (310) is released, the wall portion (200) can be stretched open by self-elastic recovery or by the action of the provided elastic member (232); Alternatively, the driving member (300) includes a capsule (320), and the capsule (320) is disposed on the wall portion (200) or the tube (110); When the medium is filled into the capsule (320), the capsule (320) can expand the wall portion (200); when the medium is extracted from the capsule (320), the capsule (320) contracts and deforms, or the wall portion (200) is brought into contact with the tube (110) as a whole through the action of a reset member.

8. The insertion portion according to claim 2, wherein: The tube body (110) comprises a passive bending section (111), an active bending section (112) and a lens mount (113) in sequence from the proximal end to the distal end; the proximal end of the wall portion (200) is arranged on the passive bending section (111) or the active bending section (112); and the distal end of the wall portion (200) is arranged on the distal side of the active bending section (112) or on the lens mount (113).

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

10. A suction system, characterized in that: The endoscope comprises a sheath tube (400) and the endoscope according to claim 9, wherein the insertion portion (100) is located inside the sheath tube (400).

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