Insertion part and endoscope

Abstract

The invention provides an insertion part and an endoscope, relates to the technical field of endoscopes, and solves the problem of large displacement of the insertion part relative to a target focus due to respiratory movement in the prior art. The endoscope is provided with an insertion part, and a working channel, a first fluid channel and a second fluid channel which are mutually independent and extend from the near end to the far end are arranged in a front end assembly of the insertion part; a to-be-fixed area integrally adjacent to the front end assembly is arranged on the outer peripheral wall of the insertion part; the first fluid channel conveys the hydrogel to an outlet located in a to-be-fixed area to be discharged; the second fluid channel conveys the hydrogel degradation agent to an outlet located in a to-be-fixed area to be discharged; an outlet of the working channel is located in the far end face of the insertion part and used for instrument penetrating and negative pressure suction. The space between the insertion part and the bronchus can be filled with hydrogel through the first fluid channel so that the insertion part can be temporarily fixed to the position, adjacent to the focus, in the bronchus, and therefore the displacement degree between the insertion part and the focus can be reduced in the breathing process of a patient.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and more specifically, to an insertion portion and an endoscope. Background Art

[0002] In the clinical operation of transbronchial interventional diagnosis and treatment of pulmonary nodule lesions, a conventional endoscope system needs to navigate a flexible insertion portion through the airway to an area adjacent to the lesion, and introduce a puncture biopsy needle or ablation electrode through the working channel in the insertion portion to perform tissue sampling or thermal ablation treatment. However, since the patient maintains spontaneous breathing movement during the operation, the volumetric deformation of the lung parenchyma during the respiratory cycle will cause a relatively obvious displacement phenomenon of the target lesion relative to the insertion portion of the endoscope. This dynamic anatomical displacement phenomenon caused by respiratory movement generally causes a relatively large relative displacement deviation of 3-15 mm between the insertion portion of the endoscope and the target lesion. This displacement will increase the risk of targeting errors, not only prolonging the average operation time, but also more likely causing complications such as airway mucosal injury and bleeding due to repeated positioning operations, directly affecting the surgical safety and the accuracy of pathological specimen collection. Summary of the Invention

[0003] The purpose of the present invention is to design an insertion portion and an endoscope to solve the problem of large displacement of the insertion portion relative to the lesion caused by respiratory movement.

[0004] The present invention is achieved by the following technical solutions: The present invention provides an insertion portion for an endoscope, the insertion portion includes a front-end assembly disposed at the distal end and internally provided with an independent working channel, a first fluid channel, and a second fluid channel that extend from the proximal end to the distal end; an area to be fixed that is integrally adjacent to the front-end assembly and extends from the proximal end to the distal end of the front-end assembly is provided on the outer peripheral wall of the insertion portion; the first fluid channel is used to receive hydrogel from the inlet and convey the hydrogel to the outlet for discharge, and the outlet of the first fluid channel is located in the area to be fixed to enable the discharged hydrogel to be distributed to the area to be fixed on the proximal side of the front-end assembly; the second fluid channel is used to receive a hydrogel degrading agent from the inlet and convey the hydrogel degrading agent to the outlet for discharge, and the outlet of the second fluid channel is located in the area to be fixed to enable the discharged hydrogel degrading agent to be distributed to the area to be fixed; the outlet of the working channel is located on the distal end surface of the insertion portion for passing through instruments and negative pressure suction.

[0005] The present invention also provides an endoscope including the above insertion portion.

[0006] The present invention has the following advantages and beneficial effects: (1) In the present invention, three independent channels are provided on the inner side of the insertion part. The first fluid channel does not pass instruments and negative pressure, but can discharge hydrogel to the periphery of the insertion part, so that the narrow space between the insertion part and the bronchial wall can be filled with hydrogel to temporarily fix the insertion part at the position adjacent to the lesion in the bronchus. In this way, the displacement between the insertion part and the lesion can be reduced during the patient's breathing, so that the instrument passing through the working channel can perform relevant operations on the lesion with lower risk and higher accuracy. The second fluid channel does not pass instruments and negative pressure, but can discharge hydrogel degradation agent to the periphery of the insertion part. If the insertion part needs to be moved later, the hydrogel degradation agent can be discharged through the second fluid channel to release the adhesion effect of the hydrogel, and then the insertion part can be moved to a new position.

[0007] (2) In the present invention, since the matching area from the outside of the insertion part to the inner wall of the bronchus is narrow, the outlet of the first fluid channel is selectively set on the outer peripheral wall of the insertion part, so that the hydrogel can have a better filling effect on the outside of the insertion part, and a better insertion part fixing effect and fixing speed can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0009] Figure 1 It is a schematic diagram of the structure of an endoscope; Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the local A in the middle; Figure 3 A partial cross-sectional structure of a distal end portion of an inserting portion provided with a fluid distribution ring and a light emitting assembly in some embodiments is shown; Figure 4 The partial cross-sectional structure of the distal end portion of the insertion portion provided with a fluid distribution ring and an electromagnet sheet in some other embodiments is shown; Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of the local B in the middle; Figure 6 shows a perspective view of a fluid distribution ring; Figure 7 The figure shows the situation where the space between the insertion part and the bronchus is filled with hydrogel and temporarily fixed; Figure 8 The figure shows how the hydrogel filling position between the insertion part and the bronchus is constrained and temporarily fixed by a magnetic field.

[0010] The markings in the figure are as follows: 100, insertion part; D, area to be fixed; 10, working channel; 20, first fluid channel; 30, second fluid channel; 40, front-end component; 41, mounting post; 42, first overlapping section; 43, step surface; 44, camera illumination component; N, light-transmitting area; 50, fluid distribution ring; 51, ring body; 52, inner lining; 53, first outlet; 54, second outlet; 55, first annular groove; 56, second annular groove; 57, first annular hole; 58, second annular hole; 60, active bending section; 61, snake bone; 62, second overlapping section; 70, annular groove; 80, electromagnet thin sheet; 81, power supply wire; 90, light-emitting component; 1000, endoscope; 2000, bronchus; 3000, hydrogel. Detailed implementation manners

[0011] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative efforts fall within the scope of protection of the present invention.

[0012] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0013] In the description and claims of this application, terms such as "first" and "second" are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / ", generally represents an "or" relationship between the associated objects before and after. In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0014] In the embodiments of this application, "proximal" and "distal" refer to the relative distances of each component from the user in the usage environment. Among them, the end closer to the user is designated as "proximal", and the end farther from the user is designated as "distal".

[0015] The present invention provides an insertion part 100 and an endoscope using the insertion part 100. A first outlet 53 for discharging hydrogel and a second outlet 54 for discharging a hydrogel degrading agent are provided on the outer peripheral wall of the insertion part 100. The first outlet 53 communicates with a first fluid channel 20 independent of the working channel 10 to connect to a hydrogel supply device, and the second outlet 54 communicates with a second fluid channel 30 independent of the working channel 10 to connect to a hydrogel degrading agent supply device. The insertion part 100 can discharge hydrogel into the space between its outer periphery and the inner wall of the bronchus, and temporarily fix the insertion part 100 by the adhesion of the hydrogel to the outer peripheral wall of the insertion part 100 and the inner wall of the bronchus, reducing the displacement of the insertion part 100 relative to the lesion during the patient's breathing, and solving the problem of large displacement of the insertion part relative to the lesion caused by respiratory movement. When it is necessary to release the temporary fixation of the insertion part 100 and the bronchus, the hydrogel de-crosslinking can be carried out by discharging the hydrogel releasing solution through the second fluid channel 30 from the second outlet 54.

[0016] The following combines the attached Figures 1-8 , and through specific embodiments and their application scenarios, the insertion part 100 and the endoscope 1000 provided by this application are described in detail.

[0017] On the one hand, the present invention provides an insertion part 100, such as Figure 1As shown, the insertion portion 100 is a component of the endoscope 1000 and is a component that is inserted into the human body cavity and delivers related instruments, water, gas, etc. into the human body.

[0018] As Figure 2 shown, the insertion portion 100 includes a front-end assembly 40 provided at the distal end and a slender rod member that connects to the proximal end of the front-end assembly 40 and is used to connect to the endoscope handle. A camera illumination assembly 44 with a viewing window located on its distal end face is installed inside the front-end assembly 40.

[0019] As Figures 2-5 shown, a working channel 10 is provided inside the insertion portion 100. The working channel 10 extends from the proximal end of the slender rod member connected to the endoscope handle to the distal end face of the front-end assembly 40. The proximal end of the working channel 10 serves as its inlet, and the distal end serves as its outlet. The working channel 10 is a channel for guiding the shuttle of instruments and negative pressure suction. The instrument can pass through the outlet of the working channel 10 to the distal side of the front-end assembly 40. The working channel 10 is provided by a slender pipe fitting arranged along the insertion portion 100.

[0020] Referring Figure 3 , a first fluid channel 20 and a second fluid channel 30 are also provided inside the insertion portion 100. The first fluid channel 20 and the second fluid channel 30 extend from the proximal end of the slender rod member connected to the endoscope handle to the outer peripheral wall of the slender rod member connected to the endoscope handle. Similar to the working channel 10, the first fluid channel 20 and the second fluid channel 30 are respectively provided by slender pipe fittings arranged along the insertion portion 100. The working channel 10, the first fluid channel 20, and the second fluid channel 30 are independent of each other and do not communicate with each other.

[0021] As Figure 2 shown, a virtual area D to be fixed with a certain range is defined on the outer peripheral wall of the insertion portion 100. This area D to be fixed is a preferred position for temporarily fixing to the inner wall of the bronchus. The position of the area D to be fixed determines the position setting of the final discharge ports of the hydrogel and the hydrogel degrading agent, such as the setting positions of the outlets of the first fluid channel 20 and the second fluid channel 30.

[0022] The area D to be fixed extends from the proximal end to the distal end of the front-end assembly 40, so that the distal boundary of the area D to be fixed is located at the proximal end of the front-end assembly 40, and the proximal boundary is located on the proximal side of the front-end assembly 40. The axial distance between the proximal boundary and the distal boundary of the area D to be fixed is not too far, so that the area D to be fixed is generally adjacent to the front-end assembly 40 as a whole. The axial distance between the proximal boundary and the distal boundary of the area D to be fixed can be 1 - 15 mm, such as 1 mm, 3 mm, 5 mm, 10 mm, 15 mm.

[0023] The area D to be fixed may be a rectangular area or a circular area located on the outer peripheral wall of the insertion part 100 , but is preferably an annular area surrounding the insertion part 100 .

[0024] In this embodiment, the outlet of the first fluid channel 20 is located in the area to be fixed D, and the first fluid channel 20 is used to receive the hydrogel from the inlet and transport the hydrogel to the outlet for discharge, so that the discharged hydrogel can be distributed to the area to be fixed D. The outlet of the second fluid channel 30 is located in the area to be fixed D, and the second fluid channel 30 is used to receive the hydrogel degradation agent from the inlet and transport the hydrogel degradation agent to the outlet for discharge, so that the discharged hydrogel degradation agent can be distributed to the area to be fixed D.

[0025] It should be noted that the hydrogel discharged from the outlet of the first fluid channel 20 may flow out smoothly or spray out. The hydrogel degradation agent discharged from the outlet of the second fluid channel 30 may flow out smoothly or spray out. The hydrogel discharged from the first fluid channel 20 is not necessarily limited to the area to be fixed D, and some of the hydrogel may flow to the outside of the area to be fixed D. The hydrogel degradation agent discharged from the second fluid channel 30 is not necessarily limited to the area to be fixed D, and some of the hydrogel degradation agent may flow to the outside of the area to be fixed D.

[0026] In this embodiment, three independent channels are provided inside the insertion part 100 at the same time, wherein the first fluid channel 20 does not pass through instruments and negative pressure, but can discharge hydrogel to the periphery of the insertion part 100, so that the narrow space between the insertion part 100 and the bronchial wall can be filled with hydrogel to temporarily fix the insertion part 100 at the position adjacent to the lesion in the bronchus, so that the displacement between the insertion part 100 and the lesion can be reduced during the patient's breathing, so that the instrument passing through the working channel can perform relevant operations on the lesion with lower risk and higher accuracy. The second fluid channel 30 does not pass through instruments and negative pressure, but can discharge hydrogel degradation agent to the periphery of the insertion part 100. If the insertion part 100 needs to be moved later, the hydrogel degradation agent can be discharged through the second fluid channel 30 to release the adhesion effect of the hydrogel, and then the insertion part 100 can be moved to a new position.

[0027] refer to Figure 7 Since the matching area from the outside of the insertion part 100 to the inner wall of the bronchus is narrow, the outlet of the first fluid channel 20 is selectively set on the outer peripheral wall of the insertion part 100, so that the hydrogel can have a better filling effect on the outside of the insertion part 100, and a better fixing effect and fixing speed of the insertion part 100 can be obtained.

[0028] According to some optional embodiments, Figures 2-8As shown, the elongated rod member of the insertion portion 100 connected to the endoscope handle includes a fluid distribution ring 50, an active bending section 60, and a passive bending section. The active bending section 60 includes a snake bone 61 and an outer skin located on the periphery of the snake bone 61. The fluid distribution ring 50, the active bending section 60, and the passive bending section are sequentially connected from the distal end to the proximal end. The distal end of the fluid distribution ring 50 is fixedly connected to the proximal end of the front-end assembly 40, and the proximal end is fixedly connected to the distal end of the active bending section 60.

[0029] A plurality of first outlets 53 and a plurality of second outlets 54 are provided on the outer peripheral surface of the fluid distribution ring 50. All the first outlets 53 are arranged in sequence along the circumferential direction on the outer peripheral surface of the fluid distribution ring 50, and all the second outlets 54 are arranged in sequence along the circumferential direction on the outer peripheral surface of the fluid distribution ring 50. Among them, it is advisable that all the first outlets 53 and the second outlets 54 are equidistantly arranged in the circumferential direction.

[0030] The outlet of the first fluid channel 20 is communicated with all the first outlets 53, so that the hydrogel conveyed by the first fluid channel 20 can be more evenly distributed to all the first outlets 53 for discharge. The outlet of the second fluid channel 30 is communicated with all the second outlets 54, so that the hydrogel degrading agent conveyed by the second fluid channel 30 can be more evenly distributed to all the second outlets 54 for discharge.

[0031] In this embodiment, the outlet of the first fluid channel 20 is communicated with a plurality of first outlets 53, so that the hydrogel can be more evenly injected into the space between the insertion portion 100 and the bronchus, enabling the hydrogel to more quickly and fully complete the space filling, reducing the hydrogel injection amount and the time for subsequent removal of the hydrogel adhesion effect. The outlet of the second fluid channel 30 is communicated with a plurality of second outlets 54, so that the hydrogel degrading agent can be more evenly sprayed onto the hydrogel to quickly remove the hydrogel adhesion effect.

[0032] In some embodiments, as Figure 6 shown, a first annular hole 57 and a second annular hole 58 are arranged in sequence along the axial direction inside the fluid distribution ring 50, and the first outlet 53 and the second outlet 54 are arranged in sequence along the axial direction. The first annular hole 57 connects all the first outlets 53 and is communicated with the first fluid channel 20, and the second annular hole 58 connects all the second outlets 54 and is communicated with the second fluid channel 30.

[0033] For the convenience of processing the first annular hole and the second annular hole in the fluid distribution ring 50, as Figure 3 、 Figure 4As shown, the fluid distribution ring 50 is provided as a split structural member, which includes an annular inner liner 52 and a ring body 51 sleeved on the inner liner 52. The first outlet 53 and the second outlet 54 are both provided on the ring body 51. The inner peripheral wall of the ring body 51 is provided with a first annular groove 55 and a second annular groove 56. The first annular groove 55 connects all the first outlets 53 in series, and the second annular groove 56 connects all the second outlets 54 in series. The ring body 51 is sleeved on the inner liner 52, and the openings of the first annular groove 55 and the second annular groove 56 are blocked and sealed by the inner liner 52 to form a first annular hole 57 and a second annular hole 58 respectively.

[0034] In some embodiments, as Figure 5 shown, the second outlet 54 provided on the fluid distribution ring 50 and the first outlet 53 are arranged in sequence along the axial direction. At the same time, the second outlet 54 is inclined towards the first outlet 53, so that the second outlet 54 can guide the hydrogel degrading agent to spray towards the hydrogel concentrated position in a concentrated manner, which can improve the speed of releasing the hydrogel adhesion effect and accelerate the surgical progress.

[0035] In some embodiments, as Figures 2-6 shown, on the outer peripheral wall of the fluid distribution ring 50, in the axial direction, the second outlet 54 is closer to the distal end of the front end assembly 40 than the first outlet 53. In this way, when the second outlet 54 is arranged closer to the distal end of the front end assembly 40 than the first outlet 53, less hydrogel discharged from the first outlet 53 will flow to the outer periphery of the front end assembly 40 and the distal end side of the front end assembly 40, which can not only ensure that the adhesion structure between the insertion part 100 and the bronchus is more complete, but also avoid affecting the shape of the insertion part 100 or blocking the vision.

[0036] According to some alternative embodiments, as Figures 2-5 shown, an annular groove 70 is formed on the outer peripheral wall of the insertion part 100 on the proximal side of the front end assembly 40, and the first outlet 53 and the second outlet 54 are respectively located at the bottom of the annular groove 70.

[0037] Specifically, the outer diameter of the fluid distribution ring 50 is smaller than the outer diameter of the front end assembly 40 and the outer diameter of the active bending section 60, so that the outer peripheral wall of the fluid distribution ring 50 is recessed relative to the outer peripheral walls of the active bending section 60 and the front end assembly 40 to form an annular groove 70 on the outer peripheral wall of the insertion part 100. As Figure 7 shown, due to the existence of the annular groove 70, it can accommodate part of the hydrogel discharged from the first fluid channel 20, so that the crosslinked hydrogel can form a clamping structure with the insertion part 100 at the annular groove 70, thereby improving the connection stability between the insertion part 100 and the bronchus.

[0038] In some embodiments, as Figures 3-5As shown, the outer skin of the front-end component 40 constitutes its outer peripheral wall, and the outer skin of the active bending section constitutes its outer peripheral wall. The proximal end of the outer peripheral wall of the front-end component 40 extends axially to the outside of the fluid distribution ring 50 to form a first overlapping section 42. The first overlapping section 42 wraps and seals the proximal end portion of the fluid distribution ring 50. The distal end of the outer peripheral wall of the active bending section 60 extends axially to the outside of the fluid distribution ring 50 to form a second overlapping section 62. The second overlapping section 62 wraps and seals the distal end portion of the fluid distribution ring 50. The first outlet 53 and the second outlet 54 are located between the first overlapping section 42 and the second overlapping section 62. The front-end component 40 wraps the distal end portion and the proximal end portion of the fluid distribution ring 50 from two directions, front and back, through the first overlapping section 42 of the outer peripheral wall and the active bending section 60 through the second overlapping section 62 of the outer peripheral wall. This can not only provide a good radial limiting effect on the fluid distribution ring 50, avoiding radial offset of the proximal and distal ends of the fluid distribution ring 50 from affecting the shape of the insertion part 100, but also provide good sealing for the connection parts at the proximal and distal ends of the fluid distribution ring 50, improving the sealing performance of the axial connection part of the fluid distribution ring 50.

[0039] According to some alternative embodiments, as Figures 3-5 shown, at the central position of the proximal end face of the front-end component 40, there is an installation post 41 extending axially towards the proximal end. A perforation is provided inside the installation post 41, and the working channel 10 extends to the distal end face of the front-end component 40 through the perforation. A circular stepped surface 43 is formed on the proximal end face of the front-end component 40 around the installation post 41.

[0040] The fluid distribution ring 50 is integrally sleeved on the installation post 41. The proximal and distal ends of the fluid distribution ring 50 axially abut against the distal end of the snake bone 61 and the stepped surface 43 respectively. The distal end of the traction rope is connected to the front-end component 40. After adjusting the pretightening force of the traction rope, the front-end component 40 is pulled backward as a whole to tightly press against the fluid distribution ring 50, so that the fluid distribution ring 50 is axially clamped by the snake bone 61 and the front-end component 40. The first joint of the snake bone 61 can extend into the annular groove provided on the proximal end face of the fluid distribution ring 50 for clamping, and is fixedly bonded by injecting an adhesive. According to some alternative embodiments, as Figure 4 and Figure 5 shown, an electromagnet thin sheet 80 is provided inside the insertion part 100. When the electromagnet thin sheet 80 is energized, it can generate a magnetic field, and the hydrogel 3000 with paramagnetic particles discharged from the outlet of the first fluid channel 20 is constrained by the magnetic field to remain in all or part of the area of the area D to be fixed. Refer to Figure 7 and Figure 8, the arrangement of the electromagnet thin sheet 80 can stably confine the hydrogel 3000 with paramagnetic particles in a smaller area by generating a magnetic field, reduce the loss of the hydrogel to the proximal side or the distal side, enable the hydrogel 3000 to more fully and completely fill the space between the insertion portion 100 and the bronchus 2000, obtain a stable connection effect, and also reduce the injection amount of the hydrogel and the time and difficulty of crosslinking the hydrogel.

[0041] The electromagnet thin sheet 80 is a flexible printed circuit board with a thickness controlled between 0.2 - 0.4 mm, on which an electromagnetic winding is formed by etching copper wires. The proximal end of the electromagnet thin sheet 80 is connected to a power supply line 81, and the power supply line 81 is used to connect to a circuit board provided on the endoscope handle. By operating the relevant control buttons on the endoscope handle, the on-off of the electromagnet thin sheet 80 can be controlled to control the generation of the magnetic field.

[0042] In some embodiments, multiple groups of electromagnetic windings are provided on the electromagnet thin sheet 80, such as two groups. All the electromagnetic windings are arranged in sequence axially. By controlling the energization conditions of different electromagnetic windings, the position and / or distribution range of the hydrogel can be controlled.

[0043] In this embodiment, to achieve the above effects, a hydrogel added with paramagnetic particles needs to be selected for the hydrogel, specifically, it can be a temperature-sensitive hydrogel equipped with iron oxide nanoparticles with an average particle size of 50 nm.

[0044] According to some alternative embodiments, as Figure 3 shown, a light-emitting component 90 for emitting blue light is further provided in the insertion portion 100. The light-emitting component 90 is provided in the front-end component 40 and is located on the proximal side of the camera illumination component 44. At the same time, the irradiation direction of the light-emitting component 90 faces the side of the front-end component 40 to reduce the imaging influence on the camera illumination component 44.

[0045] In order to allow the blue light generated by the light-emitting component 90 to pass through, a light-transmitting area N that can transmit blue light is provided on the outer peripheral wall of the front-end component 40. Figure 2 In, the axial area between the virtual line segment on the outer surface of the front-end component 40 and the proximal side edge line of the front-end component 40 is the light-transmitting area N.

[0046] The light-emitting component 90 is provided in the front-end component 40 and corresponds to the light-transmitting area N. The light-emitting component 90 is connected to the circuit board of the camera illumination component 44 through a flexible circuit board for connection to the circuit board inside the endoscope handle. The outer skin of the front-end component 40 can be transparent, and a light-shielding layer is coated on the outer peripheral surface of the outer skin at a position avoiding the light-transmitting area N to reduce the influence on the camera illumination component 44 towards the distal side while ensuring the transmission of blue light.

[0047] The light-emitting component 90 can be provided in a set, or multiple sets can be axially arranged to perform more uniform blue light irradiation on the hydrogels at various locations.

[0048] In this embodiment, referring to Figure 7 , after the light-emitting component 90 for emitting blue light is arranged at a position corresponding to the light-transmitting region N in the insertion portion 100, when the hydrogel 3000 is discharged through the first outlet 53, the light-emitting component 90 can be turned on by a button provided on the endoscope handle, and the hydrogel 3000 is irradiated with the generated blue light to quickly induce the adhesion and fixation of the photo-crosslinked hydrogel to the inner wall of the insertion portion 100 and the bronchus 2000.

[0049] In this embodiment, to achieve the above effects, the hydrogel 3000 needs to be a blue light crosslinked hydrogel.

[0050] On the other hand, the present invention provides an endoscope 1000, which includes the insertion portion 100 and the endoscope handle in any of the above embodiments. Necessary devices or structures such as a circuit board and a traction rope runner are provided in the endoscope handle. An injection joint other than the instrument nozzle is also provided on the endoscope handle. The injection joint is used to communicate with the proximal ends of the first fluid channel 20 and the second fluid channel 30. The injection joint can be provided as two, which are respectively communicated with the first fluid channel 20 and the second fluid channel 30, or can be provided as a three-way joint, and the two outlets thereof are respectively communicated with the first fluid channel 20 and the second fluid channel 30. The injection joint is used to connect with a syringe or an injection device to controllably inject the hydrogel into the first fluid channel 20 and controllably inject the hydrogel degrading agent into the second fluid channel 30.

[0051] The endoscope involved in the embodiments of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, an oral endoscope, a laryngoscope, a vaginoscope, a laparoscope, an arthroscope, etc. The embodiments of the present application do not specifically limit the types of endoscopes.

[0052] It should be noted that in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0053] In addition, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0054] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. An insertion portion for an endoscope, characterized in that: The insertion portion (100) comprises a front end assembly (40) arranged at the distal end and a working channel (10), a first fluid channel (20) and a second fluid channel (30) which are independent of each other and extend from the proximal end to the distal end. The outer peripheral wall of the insertion portion (100) comprises a to-be-fixed area (D) which is integrally adjacent to the front end assembly (40) and extends from the proximal end to the distal end of the front end assembly (40). The first fluid channel (20) is used to receive the hydrogel from the inlet and transport the hydrogel to the outlet for discharge, and the outlet of the first fluid channel (20) is located in the area to be fixed (D) so that the discharged hydrogel can be distributed to the area to be fixed (D) on the proximal side of the front-end component (40); The second fluid channel (30) is used to receive the hydrogel degradation agent from the inlet and transport the hydrogel degradation agent to the outlet for discharge, and the outlet of the second fluid channel (30) is located in the area to be fixed (D) so that the discharged hydrogel degradation agent can be distributed to the area to be fixed (D); The outlet of the working channel (10) is located at the distal end surface of the insertion portion (100) for passing instruments and performing negative pressure suction.

2. An insertion portion according to claim 1, characterized in that: The insertion portion (100) comprises a fluid distribution ring (50) and an active bending section (60), wherein the distal end and the proximal end of the fluid distribution ring (50) are respectively fixedly connected to the proximal end of the front end assembly (40) and the distal end of the active bending section (60); The outer peripheral surface of the fluid distribution ring (50) is provided with a plurality of first outlets (53) and a plurality of second outlets (54) arranged in sequence along the circumferential direction; the outlet of the first fluid channel (20) is connected to the first outlet (53), and the outlet of the second fluid channel (30) is connected to the second outlet (54).

3. An insertion portion according to claim 2, characterized in that: The second outlet (54) and the first outlet (53) are arranged in sequence along the axial direction, and the second outlet (54) is arranged inclined toward the first outlet (53); and / or, in the axial direction, the second outlet (54) is closer to the distal end of the front end assembly (40) than the first outlet (53); And / or, the fluid distribution ring (50) comprises an inner lining (52) and a ring body (51) sleeved on the inner lining (52), the first outlet (53) and the second outlet (54) are both arranged on the ring body (51), the ring body (51) is also provided with a first annular groove (55) connecting all the first outlets (53) in series and a second annular groove (56) connecting all the second outlets (54) in series, and the inner lining (52) covers the notches of the first annular groove (55) and the second annular groove (56) to form an annular hole.

4. An insertion portion according to claim 2, characterized in that: The outer peripheral wall of the fluid distribution ring (50) is recessed relative to the outer peripheral wall of the active bending section (60) and the outer peripheral wall of the front end assembly (40) to form an annular groove (70) on the outer peripheral wall of the insertion portion (100).

5. An insertion portion according to claim 4, characterized in that: The proximal end of the outer peripheral wall of the front end component (40) extends axially to form a first overlapping section (42), and the first overlapping section (42) covers the proximal end of the fluid distribution ring (50). The distal end of the outer peripheral wall of the active bending section (60) extends axially to form a second overlapping section (62), and the second overlapping section (62) covers the distal end of the fluid distribution ring (50). The first outlet (53) and the second outlet (54) are located between the first overlapping section (42) and the second overlapping section (62).

6. An insertion portion according to claim 2, characterized in that: The proximal surface of the front end assembly (40) is provided with an axially extending mounting column (41), and the fluid distribution ring (50) is sleeved on the mounting column (41); a through hole is provided in the mounting column (41), and the working channel extends through the through hole to the distal surface of the front end assembly (40).

7. An insertion portion according to claim 6, characterized in that: The proximal end surface of the front end component (40) forms a step surface (43) on the periphery of the mounting column (41), the active bending section (60) comprises a serpentine bone (61), and the proximal end and the distal end of the fluid distribution ring (50) are axially abutted against the distal end of the serpentine bone (61) and the step surface (43) respectively and are axially clamped.

8. An insertion portion according to claim 2, characterized in that: The insertion portion (100) also includes an electromagnet sheet (80) provided with an electromagnetic winding, and the electromagnet sheet (80) is used to generate a magnetic field to constrain the hydrogel with paramagnetic particles discharged from the outlet of the first fluid channel (20) to remain in the entire or partial area of ​​the area to be fixed (D).

9. The insertion portion according to claim 1, characterized in that: The insertion portion (100) further comprises a light-emitting component (90) for emitting blue light, the outer peripheral wall of the front end component (40) is provided with a light-transmitting area (N) capable of transmitting blue light, and the light-emitting component (90) is arranged in the front end component (40) and corresponds to the light-transmitting area (N).

10. An endoscope, characterized in that: Comprising the insertion part according to any one of claims 1-9.

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