An insertion device, endoscope, and suction system

Abstract

This invention provides an insertion part, an endoscope, and a suction system, relating to the field of endoscopic technology. The invention includes a tube body with a first fluid channel for insertion into a sheath; a second fluid channel is arranged along the axial direction of the tube body, with its distal port adjacent to the distal port of the first fluid channel, and its proximal port communicating with the sheath; 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 dimensions and corresponding cross-sectional flow area. Compared with existing technologies, this invention has the advantage of improving the efficiency of lithotripsy removal, and when the sheath penetrates deep into the ureter or renal calyx cavity, it can effectively reduce the friction between the outer wall of the sheath and the inner wall of the ureter, avoiding mucosal pressure or tearing, thereby reducing the risk of postoperative bleeding and infection.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, and more particularly to an insertion part, an endoscope, and a suction system. Background Technology

[0002] Holmium laser lithotripsy is a minimally invasive surgical procedure commonly used to treat urinary system stones. It primarily uses laser energy to break up the stones, and then combines this with negative pressure or drainage to remove the fragments from the body. In a standard holmium laser lithotripsy procedure, the surgeon typically inserts the sheath of a ureteroscope into the ureteral opening at the renal calyx. The distal end of the endoscope enters the renal calyx cavity through the sheath, and stones in the upper, middle, and lower calyces are individually fragmented using laser treatment. The fragments are usually guided out of the body through the gap between the sheath and the endoscope insertion point using negative pressure suction.

[0003] However, in existing techniques, if the sheath opening only stops at the ureteral orifice for suction, the limited range of negative pressure and long suction transmission path may leave many small stones within the renal calyces, resulting in low stone removal efficiency and potentially inducing postoperative complications such as stone recurrence. To improve stone removal efficiency, surgeons often extend the sheath further into the renal calyces along the endoscopic insertion point, bringing the sheath opening closer to the target stone area, thereby enhancing local negative pressure suction and improving stone removal effectiveness.

[0004] The inventors discovered in their research that when the sheath extends deep into the ureter and even into the renal calyx cavity, the outer wall of the sheath is in contact with the inner wall of the ureter, and the two slide relative to each other during the operation of the endoscopic insertion section. This can easily lead to compression, friction, or even tearing of the ureteral mucosa, thereby causing damage to the ureteral wall and increasing the risk of postoperative bleeding, infection, and other complications. Summary of the Invention

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

[0006] In a first aspect, this application provides an insertion part, which adopts the following technical solution: An insertion part for use in an endoscope, the insertion part comprising: A tube body having a first fluid channel, the tube body being inserted into a sheath tube; The second fluid channel is arranged along the axial direction of the tube body, the distal port of the second fluid channel is arranged adjacent to the distal port of the first fluid channel, and the proximal port of the second fluid channel is used to communicate with the sheath. A driving component is connected to the second fluid channel and is used to drive the second fluid channel to deform along the radial direction of the pipe body, thereby adjusting its radial dimension and corresponding cross-sectional flow area.

[0007] Secondly, this application provides an insertion part, which adopts the following technical solution: An endoscope includes the insertion portion described in the above-described scheme.

[0008] Thirdly, this application provides a suction system, which adopts the following technical solution: A suction system includes the endoscope described in the above-described scheme, wherein the insertion portion is located within the sheath.

[0009] The present invention has the following advantages and beneficial effects: (1) This invention, by installing a second fluid channel on the tube body and controlling its radial deformation with a driving component, enables the second fluid channel to flexibly adjust its opening size according to clinical needs, thereby achieving a balance between channel function and insertion part size. In practical use, this structure design has the following advantages: First, the distal port of the second fluid channel is positioned adjacent to the distal port of the first fluid channel, allowing the distal port of the second fluid channel to be close to the renal calyx region. When the flushing fluid ejected from the first fluid channel impacts the stone, it makes it easier to guide loose or broken stones to the distal port of the second fluid channel, facilitating their timely aspiration and removal from the body, thereby effectively improving the efficiency of stone removal.

[0010] Secondly, when the sheath needs to enter narrow areas such as the ureter or renal calyx cavity, the second fluid channel is in close contact with the outer wall of the tube when it is not open. This does 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 the insertion process. This reduces the risk of mucosal compression and tearing caused by squeezing, scraping, etc., and helps to reduce the occurrence of postoperative complications such as bleeding and infection.

[0011] Furthermore, the second fluid channel can be expanded or contracted as needed by the driving component, so that the channel can be in a retracted state when not in use, reducing the size of the device; when it is necessary to drain the gravel or assist in suction, the driving component can be used to expand it to form an effective channel, taking into account both operational flexibility and structural compactness.

[0012] In summary, this application, through a radially adjustable second fluid channel on the tube body, and its reasonable coordination with the first fluid channel, not only significantly improves the efficiency of removing lithotripsy, but also effectively reduces the risk of damage to patient tissues, thereby enhancing the safety of the surgery and the adaptability of endoscopic insertion procedures. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 It is a schematic diagram designed to show the usage status of endoscopes and sheaths.

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

[0016] Figure 3 It is a schematic diagram designed to show the structure of a wall surface that is expanding in the radial direction.

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

[0018] Figure 5 This is a structural diagram designed to show the installation location on the wall surface.

[0019] Figure 6 It is a schematic diagram intended to show the structure where the wall surface is converging in the radial direction.

[0020] Figure 7 yes Figure 6 Enlarged view of section B.

[0021] Figure 8 It is a structural diagram intended to show the interior of the wall surface and the installation pipes.

[0022] Figure 9 This is a schematic diagram designed to show the structure where the wall surface is a deformable ring.

[0023] Figure 10 This is a schematic diagram designed to show that the driving component is a capsule, which is located on the lower side of the wall surface.

[0024] Figure 11 This is a schematic diagram designed to show that the driving component is a capsule, which is located on both sides of the interior of the wall surface.

[0025] Figure 12 This diagram is intended to demonstrate that the insertion part of this application extends into the kidney, and the wall surface is in a working state, i.e., it is radially expanded.

[0026] Figure 13 This diagram is intended to demonstrate the insertion of the sheath into the kidney to aspirate stones in a related technique.

[0027] The diagram is marked as follows: 100. Insertion section; 110. Tube body; 1101. First fluid channel; 111. Passive bending section; 112. Active bending section; 113. Lens mount; 114. Instrument tube; 200. Wall surface; 221. Second fluid channel; 230. First plate; 231. Folding section; 232. Elastic element; 240. Second plate; 250. Deformation ring; 300. Driving element; 310. Traction rope; 311. Installation tube; 320. Bag body; 400. Sheath; 500. Handle; 600. Kidney; 610. Renal calyx; 700. Stone; P. Direction of fluid aspiration. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0029] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] In the various embodiments of this application, "near end" and "far end" refer to the distance of each component from the user in the usage environment. The end closer to the user is designated as the "near end", and the end farther from the user is designated as the "far end".

[0031] In minimally invasive treatment of urinary tract stones, holmium laser lithotripsy has become one of the mainstream clinical methods due to its high stone-breaking capacity and good tissue selectivity. During the procedure, doctors typically use a ureteroscope with a sheath to guide the laser to the stone's 70° position for lithotripsy, and then use a negative pressure device to drain the remaining stone fragments. However, in clinical practice, referring to… Figure 13As shown, through extensive intraoperative observation and postoperative review, the inventors found that if the sheath is only placed at the ureteral orifice in the traditional approach, referring to the direction of fluid aspiration P, the negative pressure aspiration path is relatively long and the suction force is dispersed, which often fails to completely remove the residual stone fragments located deep in the renal calyx 610, affecting the integrity of stone removal.

[0032] To improve lithotripsy efficiency, some procedures attempt to further insert the sheath into the renal calyx 610 cavity of the kidney 600, closer to the lithotripsy site to enhance negative pressure suction. However, this procedure has introduced new technical problems in practice: the inventors noted that when the sheath 400 is deeply inserted into the renal calyx 610, its outer wall maintains continuous contact with the inner wall of the ureter or the wall of the renal calyx 610. During intraoperative adjustments, manipulations, or removal of the endoscopic insertion point, the sheath often slides repeatedly against the surrounding tissues, easily causing local mucosal compression, pulling, and friction. Improper operation or excessive force can easily damage the cavity mucosa, manifesting as bleeding, edema, or even tearing, increasing the patient's postoperative recovery burden and potentially inducing secondary infections.

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

[0034] The following is combined Figures 1 to 13 The present application provides a detailed description of an insertion part, endoscope, and suction system through specific embodiments and application scenarios.

[0035] An insertion part, applied to an endoscope, includes a tube body 110 with a first fluid channel 1101. In actual products, the first fluid channel 1101 is actually a channel inside an instrument tube 114. However, this application is not limited to the channel of the instrument tube 114; it can also be a fluid channel independently installed within the insertion part 100, such as 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 liquids, gases, or other medical media to meet the needs of different surgical scenarios. In this embodiment, the purpose of the first fluid channel 1101 is to spray liquid to flush out stones.

[0036] It should be noted that in the description of this embodiment, the "tube body 110" actually corresponds to the "insertion part 100" of the endoscope, that is, the tube body 110 constitutes the main body of the insertion part 100. The two can be regarded as the same structure in this application for the sake of consistent description in the following description. Of course, in other embodiments, the tube body 110 can also be used independently as the insertion part 100, that is, its whole is used as the constituent unit of the insertion part 100, depending on the specific design requirements.

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

[0038] The sheath 400 is primarily used to guide the insertion portion 100 to the target body cavity region, such as the renal calyx, ureter, or bladder cavity, and to provide protection to reduce frictional damage to tissues during insertion. Simultaneously, during the surgical procedure, the sheath 400 also serves as an auxiliary conduit for aspiration and drainage. A certain annular space exists between its inner wall and the insertion portion 100 tube body 110, allowing for the flow of fluid and stone fragments. Specifically, during procedures such as lithotripsy, after the stones are broken up by laser or ultrasonic lithotripsy, they flow with the irrigation fluid through this annular space into the negative pressure channel and are ultimately drained to the external collection system.

[0039] The second fluid channel 221 is arranged along the axial direction of the tube body 110. The distal port of the second fluid channel 221 is located adjacent to the distal port of the first fluid channel 1101, and the proximal port of the second fluid channel 221 is used to communicate with the sheath 400. This structure ensures the synchronization of infusion and aspiration, which is beneficial for 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 rinse the body cavity or lens area, while the second fluid channel 221 works with the negative pressure pump system to aspirate the infusion fluid and debris. However, in specific application scenarios, the functions of the two channels can be interchanged or combined without limitation.

[0040] The drive component 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 dimensions and corresponding cross-sectional flow area. This drive structure can adjust the channel size in real time according to surgical needs, improving aspiration 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, and when passing through narrow tissue, it can be contracted to reduce the diameter of the tube body 110.

[0041] Specifically, the insertion part 100 also includes a wall surface 200, which is installed in the front end region of the tube body 110. The wall surface 200 can form a second fluid channel 221 between itself and the tube body 110 or on its own wall surface. This wall surface 200 is typically made of a flexible elastic material, such as medical silicone, polyurethane membrane, or shape memory polymer, which allows for controlled deformation in space-constrained environments. This endows the second fluid channel 221 with a certain degree of flexibility and adjustability, enabling it to adapt to different cavity morphologies. The wall surface 200 provides the second fluid channel 221 with a flexible structure, making it particularly suitable for operation in complex or narrow body cavities. This facilitates adaptation to complex body cavity structures and prevents interference with tissues by rigid components, while also reducing the risk of intraoperative friction and tissue damage.

[0042] Furthermore, the position of the wall surface 200 can be flexibly adjusted according to actual application needs. It can be placed in the front end area of ​​the insertion part 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 ​​suction path, so as to meet the spatial layout requirements and drainage efficiency requirements in different procedures.

[0043] As a preferred design approach, the wall portion 200 can be in a naturally contracted state during insertion, thereby reducing the overall radial dimension of the insertion portion 100. This facilitates smooth passage through narrow channels or tortuous cavities, improving the smoothness and controllability of intraoperative advancement. After insertion into the target area, the drive component 300 expands the wall portion 200, causing 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 removing stone fragments and irrigation fluid, and improving stone removal efficiency and intraoperative visual clarity.

[0044] In addition, the wall surface 200 can be structurally designed with a preset limiting opening angle or maximum radial dimension, thereby achieving controllability of the channel cross section. Even under tissue compression or in a narrow surgical field, it can maintain an effective fluid passage cross section and prevent a decrease in aspiration efficiency due to excessive deformation.

[0045] It is worth noting that the material selected for the wall section 200 must provide necessary support during radial deformation without affecting the normal operation of the active bending section 112, thus preventing channel collapse. Furthermore, to improve structural stability, a certain amount of fiber reinforcement mesh can be embedded in the material or reinforcing ribs can be locally installed.

[0046] As an optional embodiment, the wall surface 200 that contacts the inner wall of the sheath 400 after expansion can be coated with a material with certain mutual adhesion, such as a micro-adhesive silicone layer, a medical pressure-sensitive adhesive layer, or a shape memory composite coating, to achieve stable adhesion between the wall surface 200 and the inner wall of the sheath 400 after expansion. This adhesion layer not only increases the friction between the wall surface 200 and the sheath 400, preventing problems such as loosening of the adhesion and disordered suction path caused by fluid disturbance or tissue displacement during aspiration, but also further prevents the channel from local collapse or shrinkage under negative pressure, thereby affecting the flow cross-section and aspiration efficiency.

[0047] As an optional embodiment, the inner or outer wall of the wall portion 200 can be coated with a lubricating layer, such as a hydrophilic coating, a silicone coating, or a 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. Simultaneously, they can reduce tissue adhesion or lithotripsy during aspiration, improving the overall smoothness and cleanliness of the device's operation. Furthermore, this lubricating layer also possesses certain anti-fouling and anti-liquid residue properties, facilitating postoperative instrument cleaning and reuse.

[0048] As an optional embodiment, the distal end of the wall surface 200 can be configured with a certain tilt angle, such as tilted upwards, tilted to the left, or tilted to the right, to adapt to different cavity shapes or adjust the suction direction, thereby improving the guiding effect on liquid or debris in the target area. In actual structures, this tilt angle can be achieved through molding, subsequent hot pressing, or other processing methods, and can also be customized according to the different needs of the body cavity area, without specific limitations in this application.

[0049] Furthermore, to enhance the safety of cavity contact and reduce mechanical irritation to tissues caused by the distal end of the wall surface 200, a flexible material layer, such as a medical silicone pad, foam layer, or soft rubber strip, can be integrally formed or attached to the distal end of the wall surface 200 through bonding or embedding. This layer buffers the contact pressure of the wall edge on the body cavity tissues, preventing complications such as tissue scratching, indentation, or even bleeding caused by positioning deviations or sudden expansion. This flexible structure also helps adapt to minor irregularities in the cavity wall, improving overall fit and suction sealing.

[0050] In other alternatives, the structural edges of the wall surface 200 can also be provided with rounded transitions, flange limiting rings, or arc-shaped reinforcing 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 is important to emphasize that the wall surface 200 should be selected with both flexibility and structural stability in order to ensure that no restraint effect occurs when the active bending section 112 of the insertion part 100 undergoes multidimensional deformation, and that no local collapse or indentation occurs when the channel is opened and in the suction working state, so as to ensure the smoothness and continuity of suction.

[0052] Reference Figure 4 As shown, specifically, the wall surface 200 includes a first plate 230, which is arc-shaped and can be retracted or expanded under the drive of the drive member 300 to fit close to the outer contour surface of the outer wall of the tube 110 or along the inner contour surface of the inner side wall of the sheath 400. This structure expands rapidly when the suction channel function is activated and automatically retracts when space is limited or the channel is not in use. The dynamically changing fit ensures that the insertion part 100 always maintains good fluid flow and movement flexibility.

[0053] The first plate 230 has an integrally formed folding portion 231 along its circumferential direction. The folding portion 231 is made of a material with a certain degree of elasticity, such as polyester film or silicone corrugated film. The elasticity should not be too great to avoid rebounding when folded, which would affect the tightness. When the first plate 230 is opened along the radial direction of the tube 110, the folding portion 231 is flat and smooth, and when folded, it is in a natural folded state, ensuring that the deformation of the wall surface is continuous and smooth, without forming local abrupt changes or obstructions.

[0054] As an optional embodiment, the wall surface 200 further includes a second plate 240, which, together with the first plate 230, forms a second fluid channel 221. The second plate 240 covers at least a portion of the outer wall of the pipe body 110. The cavity between the first plate 230 and the second plate 240 forms a deformation area under the action of the driving member 300. Flexible reinforcing rings or supporting ribs can be provided inside the deformation area 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 sealing problems that might occur if the second fluid channel 221 is directly formed between the first plate 230 and the outer wall of the insertion part 100. Since the first plate 230 needs to have a large deformation capacity to achieve radial contraction and expansion, if a fluid channel is directly formed between it and the insertion part 100, there is a risk of leakage or channel discontinuity due to unstable adhesion during dynamic deformation or suction.

[0056] As an optional embodiment, refer to Figure 4 As shown, after the first plate 230 expands and deforms in the radial direction, the cross-section of the second fluid channel 221 formed together with the second plate 240 is a non-complete annular hollow structure, and the two ends of the second fluid channel 221 gradually narrow and form an eagle beak shape. This shape design is beneficial for generating a flow acceleration effect at the channel outlet, improving suction efficiency, and preventing foreign objects from getting stuck or blocked. The non-complete annular channel shape can generate a certain lateral thrust on the body of the insertion part 100 when the wall surface 200 is expanded, causing the insertion part 100 to be biased towards one side of the inner cavity of the sheath tube 400, which plays a certain limiting role for the insertion part 100, making fuller use of the space in the second fluid channel 221, increasing the cross-sectional area, and thus improving suction smoothness.

[0057] As an optional embodiment, the first plate 230 and the second plate 240 can be manufactured separately and then connected and fixed by splicing during subsequent assembly. Specifically, the first plate 230 mainly undertakes the function of opening and closing the fluid channel, and needs to undergo repeated large-scale radial deformation during operation. Therefore, it is preferable to use an elastic material with high flexibility and repeated folding and deformation, such as TPU film, silicone film, or shape memory elastic composite material.

[0058] The second plate 240 primarily serves as a stable support structure, used to cover and support the tube 110 and define the channel shape. Because it mainly bears the functions of structural stability and anti-collapse, it is preferably made of materials with low elasticity and high rigidity, such as modified polyimide sheets, high-density PE film, and hot-pressed polyurethane boards. This material differentiation design allows each of the two functional modules to achieve maximum performance, improving the dynamic responsiveness and stability of the channel. Regarding structural connection, the first plate 230 and the second plate 240 can be joined through various methods, including but not limited to: adhesive or snap-fit ​​structures, welding, or hot pressing.

[0059] In addition, in some embodiments with high requirements for process integration, the first plate 230 and the second plate 240 can also be manufactured as a single piece. For example, through multi-stage composite extrusion or two-material injection molding technology, materials with different properties can be processed and formed in a mold in one step, forming an integral structure that includes both flexible deformable parts and rigid support parts. This reduces assembly steps and improves sealing and reliability, making it particularly suitable for high-end minimally invasive medical device systems. The separate manufacturing or single-piece molding of the first plate 230 and the second plate 240 can be flexibly selected according to the application scenario, cost control, and performance requirements.

[0060] In another embodiment, the wall surface 200 may employ a deformable ring 250 structure. The deformable ring 250, in a strip or ring shape, is attached to the outer wall of the tube 110 and can be made of shape memory alloy or pre-bent elastic steel wire. Under the influence of the driving element 300 or the medium, the deformable ring 250 gradually increases or decreases its contact area with the tube 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 repetitive deformable control; it is compact, provides precise control, and adapts to various surgical requirements.

[0061] As an optional embodiment, the second plate 240 covers a length greater than half the outer circumference of the tube 110 in the circumferential direction, forming a "semi-enclosed" structure, which facilitates secure fixation through edge snap-fit ​​structures, adhesive layers, or screw mounting bases. Multi-point fixation not only enhances the connection strength between the plate and the tube 110 but also effectively prevents the plate from shifting, warping, or falling off due to external disturbances during negative pressure 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 circumferentially, making the deformation process more stable and balanced, and effectively preventing eccentric or torsional deformation during expansion and deformation. At the same time, this symmetrical design allows the first plate 230 to fit more closely to the contour of the tube 110 when it is folded up, reducing the overall size and exhibiting greater adaptability and lower operational risk when traversing narrow cavities, oblique paths, or anatomical structures with bending angles.

[0063] As an optional embodiment, the drive unit 300 includes either of the following two methods: Traction rope 310 structure: The traction rope 310 is preferably made of high-strength, flexible medical-grade polyester fiber braided material, possessing properties such as tensile strength, fatigue resistance, and corrosion resistance, making it suitable for long-term intraoperative environments. The fixed end of the traction rope 310 is connected to the wall surface 200, preferably positioned in multiple axial directions of the first plate 230 in a symmetrically distributed, divergent pattern, to ensure uniform contraction of the wall surface 200 during traction, avoiding localized deformation or twisting of the wall surface 200 due to single-point pulling. The traction end passes through the inside of the tube 110, extending along the lumen to the proximal region of the insertion part 100, and connects to a control mechanism located on the handle 500, such as a slider-type cable adjustment structure, a rotary tension mechanism, or a gear-ratchet positioning mechanism, facilitating precise control by the operator with one hand.

[0064] In terms of installation design, the convergence area of ​​the traction rope 310 can be pre-set with a traction path groove, guide hole, or mounting tube 311 (e.g., Figure 8As shown, this avoids interference from the insertion part 100 with other functional components such as the fiber optic bundle and the liquid guide tube, improving wiring clarity and reliability. During the retraction operation, the operator pulls the traction rope 310 through the adjustment device of the handle 500, causing the wall surface 200 to retract and adhere to the surface of the tube body 110, reducing the overall radial dimension and facilitating smooth passage through narrow cavities. After releasing the traction rope 310, the wall surface 200 automatically pops open due to its own elasticity or the action of the elastic element 232 (such as a flexible spring), forming the required suction channel. The operation is simple and the response is rapid.

[0065] Capsule 320 Structure: The capsule 320 is made of a thin-film material with good deformation properties and biocompatibility, such as medical silicone membrane, double-layer TPU membrane, etc., preferably a pressure-resistant multi-cavity thin-walled airbag structure. (Refer to...) Figure 11 and Figure 12 As shown, the capsule 320 can be disposed in the lower region of the wall surface 200, within the internal hollow structure, or in the interlayer between the first plate 230 and the second plate 240. It can also be symmetrically disposed on both sides of the wall surface 200 to provide bidirectional symmetrical support. In actual use, gas, saline, or other medical fluid media can be injected into the capsule 320 through a control device located near the insertion part 100, causing it to expand and push the wall surface 200 outward. After the media is withdrawn, the capsule 320 contracts under the assistance of external force or a repositioning element (such as an elastic support sheet), thereby causing the wall surface 200 to retract to a state close to the tube body 110.

[0066] The control medium of the capsule 320 can be connected to external devices such as injection pumps and peristaltic pumps via a thin-diameter catheter, and is supplemented with safety mechanisms such as check valves and pressure limiting valves to ensure the stability of gas injection and the controllability of the expansion of the wall section 200. In addition, the structure of the capsule 320 is suitable for surgical scenarios requiring high flexibility, especially when the impact of the active bending section 112 on the movement of the tube 110 is minimal, providing a good structural supplement.

[0067] Of course, in other embodiments, the driving component 300 may also be selected from shape memory alloy wire (such as nickel-titanium alloy wire) and other electric driving structures, which are not limited here. The alloy wire can quickly contract when heated (e.g., when current is applied), driving the wall surface 200 to close; after power is cut off and cooling occurs, it returns to its original shape, allowing the wall surface 200 to reopen. The arrangement of the alloy wire can be combined with the folding part 231 structure of the wall surface 200 to achieve multi-point traction control, which has a short response time and high control precision, and is suitable for delicate scenarios 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 surface 200 is located on the passive bending section 111 or the active bending section 112, and the distal end of the wall surface 200 is located 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, which can realize multi-dimensional directional adjustment; while the passive bending section 111 is a structurally stable area, suitable as a fixed support area for the wall surface 200.

[0069] In a preferred embodiment, the traction rope 310 is preferably positioned within the passive bending section 111 region, because the passive bending section 111, compared to the active bending section 112, is typically constructed using a higher stiffness covering material or supporting structure, resulting in better structural stability and anti-interference capabilities. The bending behavior in this region does not depend on the control rope of the active bending section 112, thus allowing for more space and flexible layout in terms of structural integration.

[0070] Specifically, placing the insertion point of the traction rope 310 in this area allows for full utilization of the relatively large cavity space inside the passive bending section 111. This facilitates reasonable avoidance and wiring of the traction rope 310 with other functional components (such as fiber bundles, guide wire channels, and drainage tubes), reducing physical interference between them. Simultaneously, the layout of the traction rope 310 at this location is more conducive to maintaining the linearity and stability of the pulling path. When driving the wall surface 200, it is less likely to experience force transmission delays or deflection due to 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 endoscope tip, placing the insertion point of the traction rope 310 here also helps to reduce interference with the control precision of the active bending section 112 and avoid the tension or stroke change of the traction rope 310 affecting the precision operation of the insertion part 100.

[0072] In a preferred embodiment, the proximal end of the wall section 200 is installed in the passive bending section 111 region, which can effectively avoid the interference of the active bending section 112 and does not affect the fine control performance of the front end of the insertion part 100. At the same time, this arrangement can also free up enough space to arrange the drive mechanism, which is beneficial to integrated design and assembly operation.

[0073] This 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 in the front end region of the endoscope, and can be inserted into the patient's body during cavity examinations or surgical procedures to complete operations such as image acquisition, irrigation, and aspiration. The insertion section 100 has a compact overall structure, comprising a passive bending section 111, an active bending section 112, and a lens mount 113, enabling multi-angle bending adjustment and end-effector visual observation.

[0074] The insertion section 100 has a wall surface 200 and a second fluid channel 221. The wall surface 200 is deformed by a drive component 300, giving the second fluid channel 221 dynamic adjustment capabilities. Without affecting the insertion operation, the insertion section 100 can be retracted or expanded as needed during the procedure, thereby forming and releasing the suction channel to facilitate the removal of the stone 700. This design enhances the endoscope's adaptability to different surgical procedures, making it particularly suitable for surgical environments with complex body cavity structures and limited cavity space.

[0075] Furthermore, referring to Figure 12 As shown, this application also provides a suction system, including a sheath 400 and the endoscope described in the above embodiment. During stone suction, the insertion part 100 is used within the sheath 400. The sheath 400 is typically inserted into the body cavity first to provide a guiding path and mechanical protection for the endoscope insertion part 100. It has a certain rigidity and bending resistance, effectively reducing friction between the insertion part 100 and the body cavity tissue, thereby reducing damage to the mucosa or tissue during surgery. The insertion part 100 is introduced into the body cavity via the sheath 400, and a gap region is formed between its outer wall and the inner wall of the sheath 400, serving as a suction path to facilitate the negative pressure suction of stone fragments, fluid, etc., to the outside of the body.

[0076] During use, once the insertion part 100 enters the sheath 400 and reaches the predetermined position, the operator can control the drive component 300 to open the wall part 200, causing it to adhere to the inner wall of the sheath 400, forming a smooth second fluid channel 221. The flushing fluid is then ejected from the instrument tube 114, i.e., the first fluid channel 1101. The specific direction of fluid suction P is as follows: Figure 12 As shown. By controlling the degree of deformation of the wall surface 200, the cross-sectional dimensions of the suction channel can be flexibly adjusted, thereby improving the negative pressure suction efficiency and ensuring that stones, blood or other tissue fluids can be smoothly discharged, avoiding channel blockage.

[0077] It should be noted that the endoscopes referred to in the embodiments of this application may be bronchoscopes, pyeloscopes, esophagoscopes, gastroscopes, colonoscopes, otoscopes, rhinoscopes, oral endoscopes, laryngoscopes, colposcopes, laparoscopes, arthroscopes, etc. The embodiments of this application do not specifically limit the types of endoscopes.

[0078] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An insertion portion (100) for an endoscope, characterized in that, The insertion part (100) includes: a tube body (110) having a first fluid channel (1101) for insertion into a sheath (400); and a second fluid channel (221) disposed along the axial direction of the tube body (110), the distal end of the second fluid channel (221) being adjacent to the distal end of the first fluid channel (1101), and the proximal end of the second fluid channel (221) being used to connect with the sheath (400). 400) Connecting configuration; the insertion part (100) further includes a wall portion (200), the wall portion (200) being disposed in the front end region of the tube body (110); a driving member (300), the driving member (300) being connected to the second fluid channel (221) and used to drive the second fluid channel (221) to deform along the radial direction of the tube body (110), thereby adjusting its radial dimension and corresponding cross-sectional flow area; the driving member (300) includes any one of the following two methods: The drive unit (300) includes a traction rope (310), the fixed end of which is connected to the wall surface (200), and the traction end of which extends towards the proximal end of the tube body (110); when the traction end is pulled, the traction rope (310) can cause the wall surface (200) to move close to the tube body (110); when the traction rope (310) is released, the wall surface (200) can be opened by self-elastic recovery or by the action of the provided elastic element (232); or, The drive unit (300) includes a bladder (320), which is disposed outside the wall surface (200) or the tube (110); when the medium is filled into the bladder (320), the bladder (320) can expand the wall surface (200); when the medium is extracted from the bladder (320), the bladder (320) shrinks and deforms, or through the action of the reset member, the wall surface (200) is made to be close to the tube (110) as a whole.

2. The insertion part according to claim 1, characterized in that, The wall surface (200) may form the second fluid channel (221) between itself and the tube body (110) or its own wall surface.

3. The insertion part according to claim 2, characterized in that, The wall surface (200) includes a first plate (230), which is arc-shaped and can be retracted or expanded under the drive of the drive member (300) to be close to the outer contour surface of the outer wall of the tube (110) or along the inner contour surface of the inner side wall of the sheath (400).

4. The insertion part according to claim 3, characterized in that, The first plate (230) is provided with a folding part (231) along its circumferential direction. The folding part (231) is flat and smooth when the first plate (230) is spread out along the radial direction of the tube (110), and is folded when the first plate (230) is closed along the radial direction of the tube (110).

5. The insertion part according to claim 4, characterized in that, The wall surface (200) further includes a second plate (240), which, together with the first plate (230), forms 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, characterized in that, 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 a non-complete annular hollow structure, and the two ends of the second fluid channel (221) gradually shrink and are shaped like an eagle's beak; and / or, the length covered by the second plate (240) along the circumferential direction of the tube (110) is greater than half of the circumference of the outer wall of the tube (110); and / or, the folded part (231) is provided at both ends of the first plate (230) in the circumferential direction.

7. The insertion part according to claim 2, characterized in that, The tube body (110) includes a passive bending section (111), an active bending section (112), and a lens mount (113) from the proximal end to the distal end. The proximal end of the wall surface (200) is disposed on the passive bending section (111) or the active bending section (112), and the distal end of the wall surface (200) is disposed on the distal side of the active bending section (112) or on the lens mount (113).

8. An endoscope, characterized in that, Includes the insertion portion as described in any one of claims 1-7.

9. A suction system, characterized in that, Includes a sheath (400) and the endoscope of claim 8, wherein the insertion portion (100) is located within the sheath (400).

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