An insertion section and endoscope

Abstract

The application provides an insertion part and an endoscope, and relates to the technical field of endoscopes, and solves the problem of large displacement of the insertion part relative to a target lesion caused by breathing movement in the prior art. The endoscope is provided with an insertion part, a working channel, a first fluid channel and a second fluid channel which are independently arranged in the front end assembly of the insertion part and extend from the proximal end to the distal end; the outer peripheral wall of the insertion part has a to-be-fixed region which is adjacent to the front end assembly as a whole; the first fluid channel delivers a hydrogel to an outlet located in the to-be-fixed region for discharge; the second fluid channel delivers a hydrogel degrading agent to an outlet located in the to-be-fixed region for discharge; and the outlet of the working channel is located on the distal end face of the insertion part for passing out of an instrument and negative pressure suction. The application can fill the insertion part with a hydrogel between the insertion part and the bronchus through the first fluid channel to temporarily fix the insertion part at the position adjacent to the lesion in the bronchus, so that the displacement degree between the insertion part and the lesion can be reduced during the breathing process of the patient.

Description

Technical Field

[0001] This invention relates to the field of endoscopy technology, and more specifically, to an insertion device and an endoscope. Background Technology

[0002] In the clinical practice of endobronchial interventional diagnosis and treatment of pulmonary nodules, conventional endoscopic systems require the flexible insertion section to be guided through the airway to the area adjacent to the lesion. A biopsy needle or ablation electrode is then inserted through the working channel of the insertion section for tissue sampling or thermal ablation. However, due to the patient's maintenance of spontaneous breathing during the procedure, the volumetric deformation of the lung parenchyma during the respiratory cycle can cause a significant displacement of the target lesion relative to the endoscopic insertion section. This dynamic anatomical displacement caused by respiratory movements can generally result in a relatively large displacement deviation of 3–15 mm between the endoscopic insertion section and the target lesion. This displacement increases the risk of targeting errors, not only prolonging the average operation time but also potentially leading to complications such as airway mucosal damage and bleeding due to repeated positioning operations, directly affecting the safety of the procedure and the accuracy of pathological sampling.

[0003] There are various existing technologies for fixing medical devices. For example, prior art CN118286584A discloses a catheter adapter and kit. Specifically, the catheter adapter includes a catheter adapter housing, a catheter, a reservoir, an adhesive, and one or more fluid flow channels. The catheter adapter housing has a proximal end, a distal end, and a lumen disposed between the distal end and the proximal end and in fluid communication with the distal end and the proximal end. The catheter is disposed at the distal end of the catheter adapter housing and in fluid communication with the lumen. The adhesive is contained in the reservoir. One or more fluid flow channels are in fluid communication with the reservoir and are configured to guide the adhesive to the patient's skin where the catheter adapter is disposed, specifically at the location where the catheter is inserted into the patient's skin. This allows for more precise delivery of tissue adhesive and a higher level of fixation of the catheter adapter to the patient's skin and / or to the catheter at the site of insertion into the patient's skin, thereby reducing catheter migration and / or displacement. However, these existing technologies are typically used to fix medical devices to a patient's skin, and can only fix the proximal part of the medical device that does not enter the body cavity. They cannot fix the distal part of the medical device, which means that the puncture biopsy needle or ablation electrode inserted from the distal end of the endoscope insertion part still has a large relative displacement relative to the target lesion. Summary of the Invention

[0004] The purpose of this invention is to design an insertion part and an endoscope to solve the problem of large displacement of the insertion part relative to the lesion due to respiratory movements.

[0005] This invention is achieved through the following technical solution:

[0006] This invention provides an insertion part for an endoscope, the insertion part including a distal end assembly and an internally disposed working channel, a first fluid channel, and a second fluid channel, which are independent of each other and extend from the proximal end to the distal end; the outer peripheral wall of the insertion part has a fixation area that is integrally adjacent to the distal end assembly and extends from the proximal end of the distal end assembly; the first fluid channel is used to receive hydrogel from the inlet and transport the hydrogel to the outlet for discharge, the outlet of the first fluid channel being located in the fixation area to allow the discharged hydrogel to be distributed to the fixation area on the proximal side of the distal end assembly; the second fluid channel is used to receive hydrogel degrading agent from the inlet and transport the hydrogel degrading agent to the outlet for discharge, the outlet of the second fluid channel being located in the fixation area to allow the discharged hydrogel degrading agent to be distributed to the fixation area; the outlet of the working channel is located on the distal end face of the insertion part for instrument insertion and negative pressure aspiration.

[0007] The present invention also provides an endoscope including the aforementioned insertion portion.

[0008] The present invention has the following advantages and beneficial effects:

[0009] (1) In this invention, three independent channels are provided on the inner side of the insertion part. The first fluid channel does not allow the instrument or negative pressure to pass through, but instead allows hydrogel to be discharged to the periphery of the insertion part. This allows the narrow space between the insertion part and the bronchial wall to be filled with hydrogel to temporarily fix the insertion part to the position of the adjacent lesion in the bronchus. This can reduce the degree of displacement between the insertion part and the lesion during the patient's breathing, and allow the instrument passing through the working channel to perform related operations on the lesion with lower risk and higher accuracy. The second fluid channel does not allow the instrument or negative pressure to pass through, but instead allows hydrogel degrading agent to be discharged to the periphery of the insertion part. If the insertion part needs to be moved later, the hydrogel degrading agent can be discharged through the second fluid channel to remove the adhesion effect of the hydrogel, and then the insertion part can be moved to a new position.

[0010] (2) In this invention, since the mating area from the outer side of the insertion part to the inner wall of the bronchus is narrow, the outlet of the first fluid channel is selected to be set on the outer peripheral wall of the insertion part, so that the hydrogel can have a better filling effect on the outer side of the insertion part, and a better insertion part fixation effect and fixation speed can be obtained. Attached Figure Description

[0011] 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.

[0012] Figure 1 This is a schematic diagram of the structure of an endoscope;

[0013] Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle;

[0014] Figure 3 A partial cross-sectional view of the distal end of the insertion portion, which includes a fluid distribution ring and a light-emitting component, is shown in some embodiments.

[0015] Figure 4 Partial cross-sectional view of the distal end of the insertion portion, which includes a fluid distribution ring and an electromagnet sheet, is shown in some other embodiments;

[0016] Figure 5 yes Figure 4 A magnified structural diagram of part B in the middle;

[0017] Figure 6 A perspective view of the fluid distribution ring is shown;

[0018] Figure 7 This illustrates a scenario where the insertion site is temporarily fixed to the bronchus by filling it with hydrogel.

[0019] Figure 8 The illustration shows a scenario where the insertion site and the bronchus are temporarily fixed by confining the position of the hydrogel filling with a magnetic field.

[0020] The diagram is marked as follows:

[0021] 100. Insertion part; D. Area to be fixed;

[0022] 10. Work passageway;

[0023] 20. First fluid channel;

[0024] 30. Second fluid channel;

[0025] 40. Front-end component; 41. Mounting column; 42. First overlapping section; 43. Step surface; 44. Camera lighting component; N. Light-transmitting area;

[0026] 50. Fluid distribution ring; 51. Ring body; 52. Liner; 53. First outlet; 54. Second outlet; 55. First annular groove; 56. Second annular groove; 57. First annular hole; 58. Second annular hole;

[0027] 60. Active bending segment; 61. Snake bone; 62. Second overlapping segment;

[0028] 70. Annular groove;

[0029] 80. Electromagnetic sheet; 81. Power supply line;

[0030] 90. Light-emitting components;

[0031] 1000. Endoscope;

[0032] 2000, Bronchi;

[0033] 3000, hydrogel. Detailed Implementation

[0034] 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.

[0035] In the description of this application, it should be noted that, unless otherwise stated, "multiple" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] 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 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, not limited in number; 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. In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] 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".

[0038] This invention provides an insertion part 100 and an endoscope employing the insertion part 100. The outer peripheral wall of the insertion part 100 is provided with a first outlet 53 for discharging hydrogel and a second outlet 54 for discharging a hydrogel degrading agent. The first outlet 53 communicates with a first fluid channel 20, independent of the working channel 10, to connect to a hydrogel supply device. 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 temporarily fix itself by discharging hydrogel into the space between its outer periphery and the inner wall of the bronchus, through adhesion of the hydrogel to the outer peripheral wall of the insertion part 100 and the inner wall of the bronchus. This reduces the displacement of the insertion part 100 relative to the lesion during the patient's breathing, solving the problem of large displacement of the insertion part relative to the lesion due to respiratory movements. When it is necessary to release the temporary fixation of the insertion part 100 to the bronchus, a hydrogel decomposition solution can be delivered through the second fluid channel 30 and discharged from the second outlet 54 to de-crosslink the hydrogel.

[0039] The following is in conjunction with the appendix Figures 1-8 The insertion part 100 and endoscope 1000 provided in this application will be described in detail through specific embodiments and application scenarios.

[0040] On the one hand, the present invention provides an insertion part 100, such as Figure 1 As shown, the insertion part 100 is a component of the endoscope 1000, and is a part that is inserted into the human body cavity and delivers related instruments, water, air, etc. into the human body.

[0041] like Figure 2 As shown, the insertion section 100 includes a distal end assembly 40 and an elongated rod connected to the proximal end of the distal end assembly 40 for connection with an endoscope handle. A camera illumination assembly 44 with a viewing window located on its distal surface is installed within the distal end assembly 40.

[0042] like Figures 2-5 As shown, the insertion section 100 has a working channel 10 inside. The working channel 10 extends from the proximal end of the elongated rod 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 used for guiding instrument movement and negative pressure suction. Instruments can exit 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 an elongated tube arranged along the insertion section 100.

[0043] refer to Figure 3The insertion portion 100 also includes a first fluid channel 20 and a second fluid channel 30, which extend from the proximal end of the slender rod connected to the endoscope handle to the outer peripheral wall of the slender rod. Similar to the working channel 10, the first fluid channel 20 and the second fluid channel 30 are provided by slender tubing 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.

[0044] like Figure 2 As shown, a virtual fixation area D with a certain range is defined on the outer peripheral wall of the insertion part 100. The fixation area D is a better position for temporary fixation to the inner wall of the bronchus. The position of the fixation area D determines the final discharge position of the hydrogel and hydrogel degradation agent, such as the setting position of the outlet of the first fluid channel 20 and the second fluid channel 30.

[0045] The region D to be fixed extends from the proximal end of the front-end component 40 to the proximal end of the insertion portion 100, such that the distal boundary of the region D to be fixed is located at the proximal end of the front-end component 40, and the proximal boundary is located on the proximal side of the front-end component 40. The axial distance between the proximal boundary and the distal boundary of the region D to be fixed is not too far, so that the region D to be fixed appears to be adjacent to the front-end component 40 as a whole. The axial distance between the proximal boundary and the distal boundary of the region D to be fixed can be 1-15mm, for example, it can be 1mm, 3mm, 5mm, 10mm, or 15mm.

[0046] The area D to be fixed can be a rectangular area or a circular area on the outer peripheral wall of the insertion part 100, but it is preferably an annular area surrounding the insertion part 100.

[0047] In this embodiment, the outlet of the first fluid channel 20 is located in the region D to be fixed. 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 in the region D to be fixed. The outlet of the second fluid channel 30 is located in the region D to be fixed. The second fluid channel 30 is used to receive the hydrogel degrading agent from the inlet and transport the hydrogel degrading agent to the outlet for discharge, so that the discharged hydrogel degrading agent can be distributed in the region D to be fixed.

[0048] It should be noted that the hydrogel discharged from the outlet of the first fluid channel 20 can be either a gentle flow or a spray. Similarly, the hydrogel degrading agent discharged from the outlet of the second fluid channel 30 can also be either a gentle flow or a spray. The hydrogel discharged from the first fluid channel 20 is not necessarily confined to the area D to be fixed; some hydrogel may flow outside the area D. Likewise, the hydrogel degrading agent discharged from the second fluid channel 30 is not necessarily confined to the area D to be fixed; some hydrogel degrading agent may flow outside the area D.

[0049] In this embodiment, the inner side of the insertion part 100 is provided with three independent channels. The first fluid channel 20 is not for instruments or negative pressure, but can discharge hydrogel to the periphery of the insertion part 100. This allows the narrow space between the insertion part 100 and the bronchial wall to be filled with hydrogel, temporarily fixing the insertion part 100 to the adjacent lesion in the bronchus. This reduces the displacement between the insertion part 100 and the lesion during the patient's breathing, allowing instruments passing through the working channel to perform related operations on the lesion with lower risk and higher accuracy. The second fluid channel 30 is not for instruments or negative pressure, but can discharge hydrogel degrading agent to the periphery of the insertion part 100. If the insertion part 100 needs to be moved later, the hydrogel degrading agent can be discharged through the second fluid channel 30 to release the adhesive effect of the hydrogel before moving the insertion part 100 to a new position.

[0050] refer to Figure 7 Since the mating area between the outer side of the insertion part 100 and the inner wall of the bronchus is narrow, setting the outlet of the first fluid channel 20 on the outer peripheral wall of the insertion part 100 can allow the hydrogel to have a better filling effect on the outer side of the insertion part 100, thereby achieving a better fixation effect and fixation speed of the insertion part 100.

[0051] According to some optional embodiments, such as Figures 2-8 As shown, the elongated rod of the insertion part 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 around the snake bone 61. The fluid distribution ring 50, the active bending section 60, and the passive bending section are connected sequentially 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.

[0052] The fluid distribution ring 50 has multiple first outlets 53 and multiple second outlets 54 on its outer circumferential surface. All the first outlets 53 are arranged sequentially along the circumferential direction on the outer circumferential surface of the fluid distribution ring 50, and all the second outlets 54 are arranged sequentially along the circumferential direction on the outer circumferential surface of the fluid distribution ring 50. It is preferable that all the first outlets 53 and second outlets 54 are arranged at equal intervals in the circumferential direction.

[0053] The outlet of the first fluid channel 20 is connected to all the first outlets 53, so that the hydrogel transported by the first fluid channel 20 can be distributed relatively evenly to all the first outlets 53 for discharge. The outlet of the second fluid channel 30 is connected to all the second outlets 54, so that the hydrogel degrading agent transported by the second fluid channel 30 can be distributed relatively evenly to all the second outlets 54 for discharge.

[0054] In this embodiment, the outlet of the first fluid channel 20 is connected to multiple first outlets 53, allowing for more uniform injection of hydrogel into the space between the insertion part 100 and the bronchus. This enables the hydrogel to fill the space more quickly and fully, reducing the amount of hydrogel injected and the time required to remove the hydrogel adhesion. The outlet of the second fluid channel 30 is connected to multiple second outlets 54, allowing for more uniform spraying of hydrogel degrading agent onto the hydrogel, thereby quickly removing the hydrogel adhesion.

[0055] In some embodiments, such as Figure 6 As shown, the fluid distribution ring 50 is provided with a first annular hole 57 and a second annular hole 58 arranged sequentially in the axial direction, and a first outlet 53 and a second outlet 54 are arranged sequentially in the axial direction. The first annular hole 57 connects all the first outlets 53 in series and communicates with the first fluid channel 20, and the second annular hole 58 connects all the second outlets 54 in series and communicates with the second fluid channel 30.

[0056] To facilitate the machining of the first and second annular holes in the fluid distribution ring 50, such as Figure 3 , Figure 4 As shown, the fluid distribution ring 50 is configured as a split structure, comprising an annular inner liner 52 and an annular body 51 fitted onto the inner liner 52. A first outlet 53 and a second outlet 54 are both located on the annular body 51. The inner circumferential wall of the annular body 51 has 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 annular body 51 is fitted onto the inner liner 52, and the inner liner 52 blocks and closes the openings of the first annular groove 55 and the second annular groove 56 to form a first annular hole 57 and a second annular hole 58, respectively.

[0057] In some embodiments, such as Figure 5 As shown, the second outlet 54 and the first outlet 53 on the fluid distribution ring 50 are arranged sequentially along the axial direction. At the same time, the second outlet 54 is inclined toward the first outlet 53, so that the second outlet 54 can guide the hydrogel degrading agent to the position where the hydrogel is concentrated and spray it onto the hydrogel. This can improve the speed of removing the hydrogel adhesion effect and speed up the operation.

[0058] In some embodiments, such as Figures 2-6As 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. Thus, when the second outlet 54 is positioned further distal to 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 side of the front-end assembly 40. This not only ensures a more complete adhesion structure between the insertion part 100 and the bronchus, but also avoids affecting the shape of the insertion part 100 or obstructing the field of vision.

[0059] According to some optional embodiments, such as Figures 2-5 As shown, an annular groove 70 is formed on the outer peripheral wall of the insertion part 100 near the proximal end of the front end component 40, and the first outlet 53 and the second outlet 54 are respectively located on the bottom of the annular groove 70.

[0060] Specifically, the outer diameter of the fluid distribution ring 50 is smaller than that of the front end assembly 40 and the active bending section 60, causing the outer peripheral wall of the fluid distribution ring 50 to be recessed relative to the outer peripheral wall of the active bending section 60 and the outer peripheral wall of the front end assembly 40, thereby forming an annular groove 70 on the outer peripheral wall of the insertion portion 100. For example... Figure 7 As shown, the presence of the annular groove 70 allows it to accommodate a portion of the hydrogel discharged from the first fluid channel 20, enabling the cross-linked hydrogel to form a snap-fit ​​structure with the insertion part 100 at the annular groove 70, thereby improving the connection stability between the insertion part 100 and the bronchus.

[0061] In some embodiments, such as Figures 3-5 As shown, the outer skin of the front-end component 40 forms its outer peripheral wall, and the outer skin of the active bending section forms 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, which covers and seals 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 the outside of the fluid distribution ring 50 to form a second overlapping section 62, which covers and seals 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. The front end component 40, 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, covers the distal and proximal ends of the fluid distribution ring 50 from both front and rear directions. This not only provides a good radial limiting effect on the fluid distribution ring 50, preventing radial displacement of the proximal and distal ends of the fluid distribution ring 50 from affecting the shape of the insertion part 100, but also provides a good seal at the connection between the proximal and distal ends of the fluid distribution ring 50, improving the sealing performance of the axial connection of the fluid distribution ring 50.

[0062] According to some optional embodiments, such as Figures 3-5As shown, a mounting post 41 extending axially towards the proximal end is provided at the center of the proximal end face of the front-end component 40. The mounting post 41 has a through hole, and the working channel 10 extends to the distal end face of the front-end component 40 through the through hole. The proximal end face of the front-end component 40 forms a ring-shaped stepped surface 43 around the mounting post 41.

[0063] The fluid distribution ring 50 is integrally fitted onto the mounting 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 front end assembly 40 is connected to the traction rope. After the traction rope is pre-tensioned, the front end assembly 40 is pulled backward to press against the fluid distribution ring 50, so that the fluid distribution ring 50 is clamped axially by the snake bone 61 and the front end assembly 40. The first segment of the snake bone 61 can be inserted into the annular groove provided on the proximal end face of the fluid distribution ring 50 for engagement and is fixed by injecting adhesive.

[0064] According to some optional embodiments, such as Figure 4 and Figure 5 As shown, an electromagnet sheet 80 is provided inside the insertion part 100. When the electromagnet sheet 80 is energized, it generates a magnetic field, which confines the hydrogel 3000 containing paramagnetic particles discharged from the outlet of the first fluid channel 20 to all or part of the region D to be fixed. (Reference) Figure 7 and Figure 8 The electromagnet sheet 80 can generate a magnetic field to stably confine the hydrogel 3000 with paramagnetic particles in a smaller area, reducing the loss of hydrogel to the proximal or distal side. This allows the hydrogel 3000 to more fully and completely fill the space between the insertion part 100 and the bronchus 2000, achieving a stable connection effect. It can also reduce the amount of hydrogel injected and the time and difficulty of decrosslinking the hydrogel.

[0065] The electromagnet sheet 80 is a flexible printed circuit board with a thickness controlled between 0.2 and 0.4 mm, on which electromagnetic windings are formed by etching copper wires. The proximal end of the electromagnet sheet 80 is connected to a power supply line 81, which is used to connect to a circuit board mounted on the endoscope handle. The on / off state of the electromagnet sheet 80 is controlled by operating the relevant control buttons on the endoscope handle to control the generation of the magnetic field.

[0066] In some embodiments, the electromagnet sheet 80 is provided with multiple sets of electromagnetic windings, such as two sets. All the electromagnetic windings are arranged sequentially in the axial direction. The position and / or distribution range of the hydrogel can be controlled by controlling the energization of different electromagnetic windings.

[0067] In this embodiment, to achieve the above effects, the hydrogel needs to be a hydrogel with added paramagnetic particles, specifically a thermosensitive hydrogel with iron oxide nanoparticles having an average particle size of 50 nm.

[0068] According to some optional embodiments, such as Figure 3 As shown, the insertion part 100 is also provided with a light-emitting component 90 for emitting blue light. The light-emitting component 90 is disposed in the front end component 40 and located on the proximal side of the camera illumination component 44. At the same time, the illumination direction of the light-emitting component 90 is towards the side of the front end component 40 to reduce the impact on the imaging of the camera illumination component 44.

[0069] In order to allow the blue light generated by the light-emitting component 90 to pass through, the outer peripheral wall of the front-end component 40 is provided with a light-transmitting area N that allows blue light to pass through. Figure 2 In the diagram, the axial region between the dashed line segment on the outer surface of the front-end component 40 and the near-end edge of the front-end component 40 is the light-transmitting region N.

[0070] The light-emitting component 90 is disposed within 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 via 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, so as to ensure the transmission of blue light while reducing the impact on the camera illumination component 44 to the distal side.

[0071] The light-emitting components 90 can be set in one group or multiple groups along the axial direction to provide more uniform blue light irradiation to the hydrogel at various locations.

[0072] In this embodiment, reference Figure 7 After the light-emitting component 90 for emitting blue light is set in the insertion part 100 at the position corresponding to the light-transmitting area N, the hydrogel 3000 is discharged through the first outlet 53. The light-emitting component 90 can be turned on by the button set on the endoscope handle. The generated blue light irradiates the hydrogel 3000, which quickly induces the light cross-linked hydrogel to adhere and fix to the inner wall of the insertion part 100 and the bronchus 2000.

[0073] In this embodiment, to achieve the above effects, the hydrogel 3000 needs to be a blue light crosslinked hydrogel.

[0074] On the other hand, the present invention provides an endoscope 1000, which includes the insertion part 100 and an endoscope handle as described in any of the above embodiments. The endoscope handle is provided with necessary equipment or structures such as a circuit board and a traction rope wheel. The endoscope handle is also provided with an injection connector other than the instrument mouth, which is used to communicate with the proximal ends of the first fluid channel 20 and the second fluid channel 30. There can be two injection connectors, one communicating with the first fluid channel 20 and the other with the other with the other with the other, or there can be a single three-way connector, with its two outlets communicating with the first fluid channel 20 and the other with the other with the other with the other. The injection connector is used to connect to a syringe or injection device for controllably injecting hydrogel into the first fluid channel 20 and controllably injecting a hydrogel degrading agent into the second fluid channel 30.

[0075] The endoscopes involved 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.

[0076] 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. Unless otherwise specified, 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.

[0077] Furthermore, it should be noted that the scope of the methods and apparatus 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. In addition, features described with reference to certain examples may be combined in other examples.

[0078] 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 part for an endoscope, the insertion part (100) for insertion into a human body cavity, comprising a distal end assembly (40) and an internal working channel (10), the working channel (10) extending from a proximal end to a distal end, the outlet of the working channel (10) being located at the distal end face of the distal end assembly (40) for instrument exit and negative pressure aspiration, characterized in that: The insertion part (100) is provided with a first fluid channel (20) and a second fluid channel (30) extending from the proximal end to the distal end. The working channel (10), the first fluid channel (20) and the second fluid channel (30) are independent of each other. The outer peripheral wall of the insertion part (100) has a fixation area (D) that is generally adjacent to the front end assembly (40) and extends from the proximal end of the front end assembly (40) to the proximal end of the insertion part (100). The first fluid channel (20) is used to receive hydrogel from the inlet and transport the hydrogel to the outlet for discharge. The outlet of the first fluid channel (20) is located in the region to be fixed (D) so that the discharged hydrogel can be distributed to the region to be fixed on the proximal side of the front end assembly (40). The second fluid channel (30) is used to receive the hydrogel degrading agent from the inlet and transport the hydrogel degrading agent to the outlet for discharge. The outlet of the second fluid channel (30) is located in the area to be fixed (D) so that the discharged hydrogel degrading agent can be distributed in the area to be fixed (D).

2. An insertion part according to claim 1, characterized in that: The insertion part (100) includes a fluid distribution ring (50) and an active bending section (60), the distal end and the proximal end of the fluid distribution ring (50) being fixedly connected to the proximal end of the front end assembly (40) and the distal end of the active bending section (60), respectively. The outer circumferential surface of the fluid distribution ring (50) is provided with a plurality of first outlets (53) and a plurality of second outlets (54) arranged sequentially along the circumference. 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 part according to claim 2, characterized in that: The second outlet (54) and the first outlet (53) are arranged sequentially along the axial direction, and the second outlet (54) is inclined toward the first outlet (53); And / or, axially, 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) includes a liner (52) and a ring body (51) sleeved on the liner (52), the first outlet (53) and the second outlet (54) are both disposed on the ring body (51), the ring body (51) is also provided with a first annular groove (55) that connects all the first outlets (53) in series and a second annular groove (56) that connects all the second outlets (54) in series, and the liner (52) covers the openings of the first annular groove (55) and the second annular groove (56) to form an annular hole.

4. An insertion part 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 part (100).

5. An insertion part 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), which 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), which 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 part according to claim 2, characterized in that: The front end assembly (40) has an axially extending mounting post (41) on its proximal end face, and the fluid distribution ring (50) is sleeved on the mounting post (41); the mounting post (41) has a perforation, and the working channel extends to the distal end face of the front end assembly (40) through the perforation.

7. An insertion part according to claim 6, characterized in that: The proximal end face of the front end component (40) forms a stepped surface (43) around the mounting post (41). The active bending section (60) includes a snake bone (61). 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 and are axially clamped.

8. An insertion part according to claim 2, characterized in that: The insertion part (100) also includes an electromagnet sheet (80) with an electromagnetic winding, which 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 all or part of the area to be fixed (D).

9. An insertion part according to claim 1, characterized in that: The insertion part (100) further includes 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) that can transmit blue light. The light-emitting component (90) is disposed in the front end component (40) and corresponds to the light-transmitting area (N).

10. An endoscope, characterized in that: Includes the insertion portion as described in any one of claims 1-9.

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