An eddy current assembly, an insertion portion and an endoscope

Abstract

The present invention provides a vortex assembly, an insertion part and an endoscope, relating to the field of medical devices. The present invention includes a flow guide plate, which is arranged in the operation channel and is used to form at least part of the operation channel into a spiral flow channel, so that the liquid flowing through the flow guide plate flows along a spiral path; an overflow channel is formed between the flow guide plate and the operation channel, and the instrument can pass through the overflow channel. Compared with the prior art, the present invention is beneficial to complete the stone flushing in a shorter time and can quickly discharge the stone, thereby reducing to a certain extent the problem of unsmooth discharge caused by stone retention, effectively shortening the operation time, reducing the risk and discomfort of patients, and improving the safety and efficiency of the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a vortex component, an insertion part and an endoscope. Background Art

[0002] With the continuous progress of medical technology, medical endoscopes have become the core tools for diagnosing and treating various diseases such as digestive system and urinary system diseases. Especially in the treatment of stone diseases (such as kidney stones and gallstones), they play a crucial role. In the lithotripsy surgery of the urinary system, the endoscope enters the renal pelvis through the sheath tube, and uses a laser or other energy sources to crush the stones. After lithotripsy, the gap between the endoscope and the sheath tube usually serves as a reflux channel to help remove the crushed stones and the flushing fluid, thereby keeping the operation area clean and reducing the occurrence of complications.

[0003] In this process, the flushing fluid is injected through the instrument tube and aspirated through the sheath tube to remove the crushed stones and keep the field of view clear. However, due to factors such as the complex operation area and narrow space, some of the crushed stones are difficult to be effectively carried out by the flushing fluid, resulting in a longer flushing time required to discharge them. This not only prolongs the operation time but also increases the risk and discomfort of the patient. Summary of the Invention

[0004] To solve the above problems, the present application provides a vortex component, an insertion part and an endoscope.

[0005] In a first aspect, the present application provides a vortex component, adopting the following technical solution:

[0006] A vortex component is applied to an endoscope. The insertion part of the endoscope has an operation channel for the instrument to pass through. The vortex component includes a deflector.

[0007] The deflector is arranged in the operation channel and is used to form at least part of the operation channel into a spiral flow channel, so that the liquid flowing through the deflector flows along a spiral path.

[0008] An overflow channel is formed between the deflector and the operation channel, and the instrument can pass through the overflow channel.

[0009] Preferably, the deflector is movably arranged in the operation channel, and the deflector has a first state and a second state;

[0010] When the deflector is in the first state, the deflector fits against the inner wall of the operation channel, so that the cross-sectional area of the overflow channel is not less than the cross-sectional area of the instrument.

[0011] When the deflector is in the second state, the deflector forms at least part of the operation channel into a spiral flow channel;

[0012] The flow deflector is connected with a driving member, and the driving member can switch the flow deflector between a first state and a second state.

[0013] Preferably, when the flow deflector is in the second state, the cross-sectional area of the flow passage is smaller than, equal to, or larger than the cross-sectional area of the instrument.

[0014] And / or, at least part of the flow deflector is made of shape memory alloy, the driving member is used to heat the shape memory alloy, and after the shape memory alloy is heated, it can switch the flow deflector from the first state to the second state.

[0015] Preferably, a heat insulation layer is coated on the surface of the shape memory alloy.

[0016] And / or, the flow deflector is provided with reinforcing ribs.

[0017] And / or, at least part of the flow deflector is elastic, and the flow deflector can be deformed under the push of the instrument to increase the cross-sectional area of the operation passage, so that the instrument can pass through.

[0018] Preferably, the reinforcing ribs extend along the extending direction of the operation passage.

[0019] Preferably, the eddy current assembly further includes a support member, the flow deflector is arranged on the support member, and the support member is arranged in the operation passage.

[0020] And / or, the flow deflector is located at the distal end of the operation passage.

[0021] Preferably, an instrument tube is arranged in the operation passage, an instrument passage for the instrument to pass through is formed in the instrument tube, the support member and the flow deflector enclose the flow passage, and when the flow deflector is in the second state, the cross-sectional area of the flow passage is consistent with the cross-sectional area of the instrument passage.

[0022] And / or, at least part of the support member is made of electrothermal material, at least part of the flow deflector is made of shape memory alloy, the driving member includes a wire connected to the support member, and when the wire is electrified, it can make the support member generate heat to heat the shape memory alloy to deform.

[0023] And / or, a splicing seam is formed between the flow deflector and the support member. When the flow deflector is in the first state, the splicing seam is closed. When the flow deflector is in the second state, the splicing seam is opened. An elastic membrane is arranged between the flow deflector and the support member. When the flow deflector switches from the first state to the second state, the elastic membrane can be deformed under the pull of the flow deflector.

[0024] Preferably, the support member near the joint is provided with a reserved deformation zone, and the elastic membrane in the reserved deformation zone is not bonded to the support member;

[0025] And / or, a guiding slope is provided at the joint between the guide plate and the support member, so that the guide plate can be more easily docked with the support member when switching between the first state and the second state.

[0026] In a second aspect, the present application provides an insertion portion, which adopts the following technical solution:

[0027] An insert portion includes the eddy current component described in the above technical solution, the insert portion includes an operating channel, and the eddy current component is installed in the operating channel.

[0028] In a third aspect, the present application provides an endoscope, which adopts the following technical solution:

[0029] An endoscope comprises an insertion portion as described in the above technical solution.

[0030] The present invention has the following advantages and beneficial effects:

[0031] The guide plate of the present invention can guide the flushing fluid flowing through the operating channel to flow in a spiral direction, thereby optimizing the flushing effect of the stones. Specifically, during the flushing process, after the flushing fluid enters the operating channel, a spiral flow is formed under the action of the guide plate. After the flushing fluid with spiral flow enters the body, it will produce a strong disturbance effect and cause local liquid pressure changes, which will help loosen and push the stones and improve the efficiency of stone removal. As a result, the stone flushing can be completed in a shorter time, and the stones can be quickly discharged, avoiding the problem of poor removal caused by stone retention to a certain extent. In addition, the design effectively shortens the operation time, reduces the risk and discomfort of patients, and improves the safety and efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 is a first schematic diagram of an eddy current assembly according to an embodiment of the present application;

[0034] Figure 2 is a second schematic diagram of an eddy current assembly according to an embodiment of the present application;

[0035] Figure 3It is the first schematic diagram of the hidden elastic membrane of the eddy current component in the embodiment of the present application;

[0036] Figure 4 It is the second schematic diagram of the hidden elastic membrane of the eddy current component in the embodiment of the present application;

[0037] Figure 5 It is the front view of the eddy current component in the second state in the embodiment of the present application;

[0038] Figure 6 It is the front view of the eddy current component in the first state in the embodiment of the present application;

[0039] Figure 7 It is the partial structural schematic diagram of the insertion part in the embodiment of the present application;

[0040] Figure 8 It is the partial cross-sectional view of the insertion part in the embodiment of the present application;

[0041] Figure 9 It is the structural schematic diagram of the endoscope in the embodiment of the present application.

[0042] The markings in the figure are:

[0043] 10. Endoscope; 11. Insertion part; 11a. Operation channel; 11b. Instrument tube; 11c. Instrument channel; 100. Deflector; 110. Flow-through channel; 120. Reinforcing rib; 130. Guiding slope; 200. Driving part; 210. Conducting wire; 300. Support part; 310. Splicing seam; 320. Elastic membrane; 330. Reserved deformation area. Detailed implementation manners

[0044] 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 the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0045] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the related objects before and after.

[0046] In various embodiments of the present application, "proximal end" and "distal end" refer to the relative distances of various components from the user in the usage environment. Specifically, the end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0047] In urinary lithotripsy surgeries, especially in percutaneous nephrolithotomy (PCNL), the endoscope typically enters the renal pelvis through a sheath. After using a laser to break up the stones, the irrigation fluid and the fragmented stones are discharged through the reflux channel formed between the endoscope and the sheath. However, in actual operations, stone deposits often occur, which may obscure the operation area, not only interfering with subsequent lithotripsy operations but also reducing the surgical efficiency. Therefore, it is usually necessary to first use the irrigation fluid to remove most of the fragmented stones before continuing with the lithotripsy operation.

[0048] The inventors have found that traditional irrigation fluids usually maintain a stable and single flow pattern during the flushing process, with their flow velocity and direction being basically constant. However, this state often fails to generate sufficient impact force to effectively carry away all the stones. Under a stable flow pattern, the force exerted by the liquid on the stones is single and stable, making it difficult to overcome the resistance caused by the irregular shape, rough surface, or embedding in tissue folds of the stones. At the same time, in the depressions or blind spots in the surgical area, a stable flow pattern is prone to forming stagnant flow, making it difficult for the irrigation fluid to reach or transport the stones in these areas. The combined effect of these factors results in a relatively low efficiency of traditional stable-flow-pattern irrigation fluids in removing stones, prolonging the flushing time and increasing patient discomfort.

[0049] To solve the above problems, the present invention provides a vortex assembly that can guide and transform the originally stable irrigation fluid into a vortex state, thereby significantly enhancing the disturbance and impact effects of the liquid. When the irrigation fluid forms a vortex, its variable flow velocity and flow direction can generate a greater impact force, promoting the loosening and transportation of the stones, improving the removal efficiency, shortening the surgical time, and reducing the patient's risk and discomfort. This flow-state regulation design demonstrates significant advantages in complex surgical environments, providing a more efficient and safe solution for lithotripsy surgeries.

[0050] The following Figures 1 to 9 , through specific embodiments and their application scenarios, will elaborate in detail on a vortex assembly, an insertion part, and an endoscope provided by the present application.

[0051] The first aspect of this embodiment will elaborate in detail on a vortex assembly.

[0052] Refer to Figure 7 , Figure 9, an embodiment of the present application discloses a vortex assembly, which is applied to an endoscope 10. The endoscope 10 includes an insertion portion 11, and the insertion portion 11 has an operation channel 11a for allowing instruments to pass through. During use, the distal end of the insertion portion 11 is inserted into the patient's lesion area, and a flushing liquid is connected to the handle position of the endoscope 10. The flushing liquid enters the body from the distal end of the insertion portion 11 through the operation channel 11a, thereby realizing the flushing operation of the calculus.

[0053] Exemplarily, referring to Figure 7 , Figure 8 , an instrument tube 11b is installed in the operation channel 11a, and an instrument channel 11c is provided in the instrument tube 11b. The instrument tube 11b can provide a stable working environment for external instruments to enter the body through the instrument tube 11b to complete surgical operations. For example, a laser lithotripsy component can enter the body through the instrument tube 11b to perform lithotripsy operations on the calculus in the body. In some embodiments, the insertion portion 11 may further include a camera and a light source to provide a visual operation and facilitate precise operation by the operator during the surgery.

[0054] In some solutions, referring to Figure 1 , Figure 8 , the vortex assembly is disposed in the operation channel 11a. The vortex assembly can cause the flushing liquid to form a vortex flow state, thereby enhancing the flushing and carrying effects of the liquid on the calculus. It should be noted that the design of the vortex assembly does not absolutely guarantee that all calculi are completely removed in a short time, but to a certain extent improves the efficiency of calculus removal, reduces the removal time, thereby benefiting to shorten the operation time and reduce the risks and discomfort of patients.

[0055] In some solutions, the vortex assembly is disposed at the distal end of the operation channel 11a (i.e., the distal end of the insertion portion 11). This configuration enables the flushing liquid to enter the body quickly after being guided to form a vortex, thereby helping to improve the flushing effect on the calculus in the body to a certain extent. In contrast, when the vortex assembly is disposed in the middle or proximal part of the insertion portion 11, the flushing liquid may attenuate during the process of flowing in a spiral direction, resulting in insufficient spiral disturbance effect and difficult to fully play the cleaning role.

[0056] In some solutions, referring to Figure 1 , Figure 2, The eddy current assembly includes a flow guiding plate 100. The flow guiding plate 100 is disposed in the operation channel 11a and is used to form a spiral flow channel in at least part of the operation channel 11a, so that the liquid flowing through the flow guiding plate 100 flows along a spiral path. For example, the flow guiding plate 100 extends and distributes in the operation channel 11a along the spiral direction, and two or more flow guiding plates 100 can be arranged in the operation channel 11a. When the flushing liquid flows through the area of the flow guiding plate 100, since the flow guiding plate 100 is arranged along the spiral direction and intersects with the flow velocity direction of the flushing liquid flowing along the axial direction of the operation channel 11a, the flushing liquid presents a spiral flow under the guidance of the flow guiding plate 100.

[0057] Specifically, the flow guiding plate 100 can change the flow direction of the flushing liquid to a certain extent, causing the liquid to form a spiral flow. This eddy current state is beneficial to improving the disturbance and transportation ability of the flushing liquid to the calculus, thus helping to loosen and discharge the calculus. In a complex surgical environment, the design of the eddy current assembly helps to enhance the disturbance effect of the liquid. Especially when the space is narrow or there are sunken areas, the spiral flow can reduce the stagnation phenomenon to a certain extent and promote the effective removal of the calculus.

[0058] Exemplarily, the flow guiding plate 100 can be made of materials such as plastic, rubber, and / or metal. Its main function is to guide the flow of the flushing liquid, and the selected material should meet the requirements of biocompatibility.

[0059] In some solutions, referring to Figure 5 , Figure 6 , a flow-through channel 110 is formed between the flow guiding plate 100 and the operation channel 11a, and the instrument can pass through the flow-through channel 110. Among them, there are multiple flow guiding plates 100, and when the multiple flow guiding plates 100 are distributed circumferentially along the operation channel 11a, the space formed between them is the flow-through channel 110, that is, the flow-through channel 110 is surrounded by multiple flow guiding plates 100 in the operation channel 11a. It should be noted that the setting method of the flow guiding plate 100 can be diverse. For example, it can be set in segments in the operation channel 11a, only set at the distal end of the operation channel 11a, or the flow guiding plate 100 is set along the entire operation channel 11a.

[0060] To adapt to the passage of the instrument, the flow guiding plate 100 can be designed to be movable relative to the operation channel 11a, so that it can move appropriately when the instrument enters the operation channel 11a, thereby increasing the space of the flow-through channel 110 and facilitating the smooth entry of the instrument; or, by controlling the size of the flow guiding plate 100, it is ensured that the size of the flow-through channel 110 formed by it is always larger than the size of the instrument, so that the instrument can pass without the need for the flow guiding plate 100 to move, which is beneficial to the lithotripsy operation. In addition, the flow guiding plate 100 can also be set to be elastic and can deform appropriately when the instrument passes through, so as to avoid hindering the passage of the instrument.

[0061] According to an optional embodiment, with reference to Figure 3 and Figure 8 , the deflector 100 is movably disposed in the operation channel 11a, and the deflector 100 has a first state and a second state. Exemplarily, the movable setting manner of the deflector 100 may adopt a rotating mechanism, that is, the deflector 100 is directly rotationally connected to the inner wall of the operation channel 11a, or is rotationally connected to other components installed in the operation channel 11a. After adopting this structural design, the deflector 100 can rotate or deform when being pushed by an instrument or acted on by other external driving members 200, so as to realize the switching from the first state to the second state to a certain extent. In some embodiments, at least part of the deflector 100 is made of an elastic material, and this design is beneficial to the deformation of the deflector 100 under the action of an external force, thereby making the state conversion smoother.

[0062] With reference to Figure 2 , when the deflector 100 is in the first state, the deflector 100 fits against the inner wall of the operation channel 11a, so that the cross-sectional area of the flow channel 110 is not less than the cross-sectional area of the instrument. The purpose of this design is that when the instrument is in the operation channel 11a or when it is not necessary for the flushing liquid to form a vortex motion along the spiral direction, the deflector 100 can be basically retracted to reduce the interference with the flow of the flushing liquid and the passage of the instrument. It should be noted that the "fitting" here is not an absolute limitation, but means that in this state, the deflector 100 is basically arranged along the inner wall of the channel, so as to be beneficial to maintaining the stable flow state of the flushing liquid and not actively guiding the formation of a vortex.

[0063] With reference to Figure 1 , when the deflector 100 is in the second state, the deflector 100 forms a spiral flow channel in at least part of the operation channel 11a. In this state, the deflector 100 occupies or extends into the part close to the central axis of the operation channel 11a, so that the flushing liquid passing through this area presents a spiral flow under the guidance of the deflector 100. This spiral flow state is beneficial to improving the disturbance effect and conveying capacity of the flushing liquid, thereby promoting the loosening and discharge of stones to a certain extent. It should be noted that the "forming a spiral flow channel" mentioned here means that under the action of the deflector 100 structure, the liquid flow direction and local flow velocity change, and it does not exert a uniform influence on the entire operation channel 11a, but focuses on guiding the flow trajectory of the flushing liquid.

[0064] The guide plate 100 is connected to a driving member 200, and the driving member 200 can switch the guide plate 100 between the first state and the second state. Exemplarily, the driving member 200 can be a pull rope or other driving mechanism, and drive the guide plate 100 to change state through an external or built-in control component. This driving structure is beneficial for adjusting the state of the guide plate 100 as needed during surgery, thereby meeting the requirements for the passage of instruments in different time periods and promoting the formation of effective vortexes in the flushing fluid to improve the stone removal effect.

[0065] In general, in this embodiment, the structural design and state switching mechanism of the guide plate 100 realize the dynamic regulation of the flow state in the operating channel 11a to a certain extent: in the first state, the guide plate 100 is basically retracted to facilitate the smooth passage of the instrument; in the second state, the guide plate 100 guides the flushing liquid to form a spiral flow, which is beneficial to increase the liquid disturbance effect, thereby promoting the loosening and discharge of stones. This reasoning process between structure and effect provides a more reasonable technical solution for taking into account both the passage of instruments and the flushing efficiency in lithotripsy, and is also beneficial to improving the surgical effect in complex surgical environments.

[0066] According to an alternative embodiment, referring to Figure 5 , Figure 6 When the guide plate 100 is in the second state, the cross-sectional area of ​​the flow channel 110 is less than, equal to, or greater than the cross-sectional area of ​​the device. Different size designs of the flow channel 110 have different effects on the operation and flushing effect. The following describes the structure of each solution and the derivation process of its effect:

[0067] When the cross-sectional area of ​​the flow passage 110 is smaller than the cross-sectional area of ​​the instrument, in order to avoid interference of the guide plate 100 with the instrument during lithotripsy or other operations, it is usually necessary to switch the guide plate 100 to the first state through the driving member 200. In the first state, the guide plate 100 fits the inner wall of the operating channel 11a, so that the actual accommodation area of ​​the channel is not less than the minimum cross-sectional area required by the instrument, which is beneficial for the instrument to smoothly enter the operating channel 11a. Subsequently, when the instrument is in place for lithotripsy, the guide plate 100 can be switched back to the second state through the driving member 200. At this time, the guide plate 100 is partially in contact with the instrument, which not only achieves the effect of diverting the flushing liquid to form a vortex, but also provides fixed and stable support for the instrument to a certain extent. In order to reduce the extrusion of the instrument, the present scheme preferably adopts a guide plate 100 with certain elastic properties, so that it can be appropriately deformed when subjected to force, thereby reducing the extrusion effect when the instrument passes.

[0068] When the cross-sectional area of the flow-through channel 110 is equal to the cross-sectional area of the instrument, the usage mode of the instrument when entering the operation channel 11a is similar to that when the cross-sectional area of the flow-through channel 110 is smaller than the cross-sectional area of the instrument, that is, the flow guide plate 100 is in the first state during the passage of the instrument to ensure sufficient passage space. However, since the channel size just matches the instrument, this design is beneficial to fixing the instrument during the lithotripsy process, thereby reducing the operational inconvenience caused by the shaking of the instrument. At the same time, when the flow guide plate 100 switches to the second state, it can not only guide the flushing liquid to form an effective spiral flow, but also will not cause excessive mechanical extrusion to the instrument, which helps to prevent the instrument from being damaged due to compression.

[0069] When the cross-sectional area of the flow-through channel 110 is larger than the cross-sectional area of the instrument, the instrument can smoothly enter the operation channel 11a regardless of whether the flow guide plate 100 is in the first state or the second state. In practical applications, to facilitate the rapid insertion of the instrument into the body, the flow guide plate 100 is usually kept in the first state during the insertion process of the instrument to increase the size of the flow-through channel 110; after the instrument is in place, the flow guide plate 100 is then switched to the second state to make it play a guiding role and guide the flushing liquid to form a vortex. At this time, the larger channel space not only ensures the flushing liquid guiding effect, but also allows the instrument to maintain a certain degree of freedom during the lithotripsy process, facilitating rapid adjustment of the position as needed.

[0070] It can be understood that since the flushing liquid is also needed to discharge the crushed stones during the lithotripsy process of the instrument, when the instrument enters the body, the flow guide plate 100 still needs to play a role, which is beneficial to improving the stone discharge efficiency. In addition, it is also possible to adopt the method of first performing the lithotripsy operation and then using the flushing liquid for flushing after the instrument is withdrawn. At this time, there is no instrument obstruction in the operation channel 11a and the flow-through area is large, which to a certain extent helps to provide a better flushing effect.

[0071] It should be noted that the above-mentioned "cross-sectional area of the instrument" refers to the maximum cross-sectional area required for the instrument to pass through the position of the flow-through channel 110. Since the actual cross-sectional area of the instrument may change locally when the instrument moves along its axial direction, the cross-sectional area described here is the maximum area required for the instrument to pass through at the flow-through channel 110.

[0072] According to an optional embodiment, with reference to Figure 3 、 Figure 4 ,the flow guide plate 100 is at least partially made of shape memory alloy, and the driving member 200 is used to heat the shape memory alloy. After the shape memory alloy is heated, the flow guide plate 100 can be switched from the first state to the second state. Utilizing the thermally induced shape memory characteristic of the shape memory alloy can simplify the control mode of the state switching of the flow guide plate 100 to a certain extent, reduce the additional mechanical transmission structure, and thus improve the operational convenience and response speed.

[0073] During use, when it is necessary to switch the state of the deflector 100, the driving member 200 can heat the shape memory alloy to cause it to deform, thereby driving the deflector 100 to switch from the first state to the second state, forming a spiral flow channel to guide the flushing liquid to flow in a spiral direction. When the heating of the shape memory alloy stops, as the temperature of the shape memory alloy decreases, its material properties enable the deflector 100 to return to its original form, that is, back to the first state, restoring the cross-sectional area of the operation channel 11a so that the instrument can pass through or adjust the flushing liquid flow pattern.

[0074] Through this design, a complex mechanical adjustment mechanism can be avoided, making the switching process of the deflector 100 more reliable and responsive. At the same time, during the reset process of the deflector 100, the self-restoring property of the shape memory alloy is utilized to reduce the need for additional driving, thereby improving the overall reliability of the system. In addition, during the surgical process, the state of the deflector 100 can be precisely adjusted by controlling the heating time and temperature to meet different flushing and lithotripsy requirements.

[0075] According to an optional embodiment, the surface of the shape memory alloy is coated with a heat-insulating layer. Through the heat-insulating layer, the heat removal effect of the flushing liquid on the shape memory alloy can be reduced, avoiding the influence of temperature reduction on the phase change ability of the shape memory alloy, thereby ensuring that the deflector 100 can reliably switch states.

[0076] According to an optional embodiment, referring to Figure 2 、 Figure 3 The deflector 100 is provided with reinforcing ribs 120. The arrangement of the reinforcing ribs 120 can improve the rigidity of the deflector 100 during use, avoid excessive deformation when the flushing liquid flows or the instrument contacts, and can play a certain supporting role to prevent the deflector 100 from shifting in position due to liquid scouring.

[0077] According to an optional embodiment, at least part of the deflector 100 is elastic, and the deflector 100 can be deformed under the push of the instrument to increase the cross-sectional area of the operation channel 11a so that the instrument can pass through. Exemplarily, the part of the deflector 100 for contacting or approaching the instrument can be made of rubber material, which not only helps to reduce the wear on the surface of the instrument but also can deform to a certain extent when the instrument is pushed to avoid the instrument being stuck due to excessive extrusion.

[0078] According to an optional embodiment, the reinforcing ribs 120 extend along the extension direction of the operation channel 11a. This helps to reduce the influence on the flow velocity of the flushing liquid and to optimize the spiral flow effect of the flushing liquid to a certain extent, thereby enhancing the disturbing force of the eddy current on the stone and the flushing effect.

[0079] According to an optional embodiment, referring to Figure 3 、 Figure 4, the eddy current assembly further includes a support member 300. The deflector 100 is disposed on the support member 300, and the support member 300 is disposed in the operation channel 11a. Through the design of the support member 300, the installation method of the deflector 100 can be optimized to a certain extent, the assembly efficiency can be improved, and at the same time, the stability of the overall structure can be enhanced.

[0080] Specifically, the support member 300 can adopt an integrally formed ring structure, frame structure or bracket structure, so that a plurality of deflectors 100 can be evenly distributed in the circumferential or axial direction of the operation channel 11a, and the whole is installed in the operation channel 11a through the support member 300. Compared with installing each deflector 100 separately on the inner wall of the operation channel 11a, this method can reduce the installation steps, improve the assembly efficiency, and reduce the deviation during the installation of the deflector 100 to a certain extent.

[0081] In addition, the support member 300 can also provide additional structural support to enhance the stability of the deflector 100 during the flow of the flushing liquid, and avoid the situation that the deflector 100 loosens or shifts due to the impact of the flushing liquid or the passage of the instrument. In some solutions, the support member 300 can adopt an elastic material or a deformable structure to adapt to the shape of the inner wall of the operation channel 11a, ensure the firmness of the installation, and reduce the impact on the instrument to a certain extent. For example, the support member 300 can adopt a mesh or hollow design to reduce the obstruction to the flow of the flushing liquid, while still effectively supporting the deflector 100, so that the flushing liquid forms a stable spiral flow when passing through the deflector 100, improving the flushing effect.

[0082] According to an alternative embodiment, referring to Figure 7 , Figure 8 , the deflector 100 is located at the distal end of the operation channel 11a. After the flushing liquid is deflected by the deflector 100, a spiral flow can be quickly formed and enter the body, thereby reducing the energy loss on the flow path to a certain extent, reducing the attenuation of the spiral flow, and improving the flushing effect.

[0083] Through this arrangement, the kinetic energy of the flushing liquid can be more directly used to disturb and transport the stones, which helps to improve the stone discharge efficiency after lithotripsy. Especially when the operation channel 11a is relatively long, if the deflector 100 is arranged in the middle or proximal section of the operation channel 11a, after the flushing liquid passes through a long distance, the spiral flow may be weakened due to factors such as frictional resistance and flow rate attenuation, thereby reducing the flushing and removal effect on the stones. Therefore, arranging the deflector 100 at the distal end of the operation channel 11a can optimize the formation conditions of the spiral flow to a certain extent and improve the overall efficiency of the surgical operation.

[0084] According to an optional embodiment, an instrument tube 11b is provided in the operation channel 11a, and an instrument channel 11c for the passage of instruments is formed in the instrument tube 11b. The support member 300 and the flow guide plate 100 enclose a flow-through channel 110. When the flow guide plate 100 is in the second state, the cross-sectional area of the flow-through channel 110 is the same as that of the instrument channel 11c. This design can optimize the passage environment of the instrument to a certain extent and reduce problems such as instrument jamming or poor passage caused by the mismatch between the cross-sectional areas of the flow-through channel 110 and the instrument channel 11c. For example, when the cross-sectional area of the instrument channel 11c is large and the cross-sectional area of the flow-through channel 110 is small, the instrument may jam at the intersection of the instrument channel 11c and the flow-through channel 110, affecting the flexibility of the operation. If the cross-sectional area of the flow-through channel 110 is large, a sudden change area may be formed, resulting in uneven support of the instrument and affecting stability.

[0085] In addition, this design can also ensure that the flushing liquid can flow smoothly through the flow-through channel 110 when the flow guide plate 100 is in the second state, and at the same time, there will be no obvious flow rate change or abnormal vortex at the junction of the instrument channel 11c and the flow-through channel 110, making the spiral flow of the flushing liquid more stable and improving the flushing effect on the calculus. In some solutions, the instrument tube 11b can be made of a smooth material or coated with a low-friction coating to further optimize the passage performance of the instrument, reduce the operation resistance, and improve the convenience and efficiency of the lithotripsy surgery.

[0086] According to an optional embodiment, at least part of the support member 300 is made of electrothermal material, at least part of the flow guide plate 100 is made of shape memory alloy, and the driving member 200 includes a wire 210 connected to the support member 300. When the wire 210 is energized, the support member 300 can be heated to make the shape memory alloy deform by heating. By integrating electrothermal material in the support member 300, the heating efficiency of the flow guide plate 100 can be optimized to a certain extent. Compared with directly energizing and heating the shape memory alloy, since the resistance of the shape memory alloy is low, its electrothermal conversion efficiency is relatively low. However, using electrothermal material as at least part of the support member 300 can convert electrical energy into heat more efficiently and transfer it to the shape memory alloy, enabling it to quickly reach the corresponding temperature and achieve shape change.

[0087] In addition, this design can reduce the need for external complex heating equipment and make the switching of the flow guide plate 100 more convenient. In specific implementation, the electrothermal material can be a high-resistivity metal or a conductive polymer, such as nickel-chromium alloy, carbon-based conductive material, etc., so as to achieve efficient heating. The electrothermal part of the support member 300 can be locally coated or embedded as needed to optimize the overall heating efficiency and avoid unnecessary heat dissipation affecting the performance of other components.

[0088] Furthermore, in some solutions, the heating degree of the support member 300 can be controlled by adjusting the current or voltage, so as to precisely adjust the temperature of the shape memory alloy, ensure that the flow guide plate 100 completes the state switching within a suitable temperature range, and avoid deterioration of material properties due to overheating or affecting other components in the operation channel 11a.

[0089] According to an optional embodiment, referring to Figure 3 , Figure 6 , a splicing seam 310 is formed between the flow guide plate 100 and the support member 300. When the flow guide plate 100 is in the first state, the splicing seam 310 is closed. When the flow guide plate 100 is in the second state, the splicing seam 310 is opened; an elastic membrane 320 is provided between the flow guide plate 100 and the support member 300. When the flow guide plate 100 switches from the first state to the second state, the elastic membrane 320 can be deformed under the pull of the flow guide plate 100.

[0090] When the flow guide plate 100 is in the first state, the splicing seam 310 is open, facilitating the movement of the flow guide plate 100 relative to the support member 300 through the splicing seam 310. When the flow guide plate 100 is in the second state, the splicing seam 310 is closed, thus forming a continuous flow channel 110 for facilitating the passage of instruments.

[0091] To further optimize the state switching process of the flow guide plate 100, an elastic membrane 320 is provided between the flow guide plate 100 and the support member 300. The elastic membrane 320 can deform with the movement of the flow guide plate 100 when the flow guide plate 100 switches from the first state to the second state, thus playing a buffering role and avoiding the impact of the too-fast movement speed of the flow guide plate 100 on the instruments. For example, when the flow guide plate 100 is rapidly unfolded under the action of the driving member 200, the elastic membrane 320 can provide a certain damping effect, making its switching process smoother and reducing the impact on the surrounding instruments.

[0092] In addition, the elastic membrane 320 can also optimize the sealing performance of the splicing seam 310 to a certain extent, avoiding the splicing seam 310 becoming a leakage channel for the flushing liquid when the flow guide plate 100 is in the first state and affecting the spiral flow effect. In terms of material selection, the elastic membrane 320 can adopt a polymer material with good elasticity, such as silica gel, thermoplastic elastomer (TPE) or shape memory elastomer, to ensure good sealing and buffering effects after multiple deformations. When the flow guide plate 100 is in the second state, the elastic membrane 320 opens with the flow guide plate 100 and forms a certain arc or corrugated structure in the flow channel 110, so as to further guide the liquid flow direction during the flow of the flushing liquid and make it flow along a spiral trajectory. This auxiliary effect can strengthen the eddy current effect of the flushing liquid, make it more stable and have a higher flow rate, thereby improving the discharge efficiency of stone debris.

[0093] Specifically, when the flushing liquid flows along the operation channel 11a, the opened elastic membrane 320 can generate a certain guiding effect when the liquid flow passes through, making the rotation direction of the liquid flow more uniform and reducing the energy loss caused by turbulence. At the same time, the deformation characteristics of the elastic membrane 320 can also generate a tiny vibration effect when impacted by the flushing liquid, and this vibration can, to a certain extent, enhance the scouring ability of the flushing liquid on the stone debris, further improving the flushing efficiency.

[0094] In addition, the flexible characteristics of the elastic membrane 320 can also adapt to flushing liquids with different flow rates and pressures, enabling the vortex guiding ability of the flow deflector 100 to maintain good effects in different usage scenarios. For example, at low flow rates, the elastic membrane 320 can maintain a certain unfolded shape to guide the flushing liquid to form a stable rotational flow; at high flow rates, the elastic membrane 320 can deform appropriately with the fluid pressure to ensure that the flushing liquid can still form an effective vortex structure under high-pressure conditions and will not cause the vortex to be destroyed due to too high a flow rate.

[0095] According to an optional embodiment, referring to Figure 1 、 Figure 3 , at the support member 300 near the splicing seam 310, a reserved deformation area 330 is provided, and the elastic membrane 320 in the reserved deformation area 330 is not bonded to the support member 300. By providing the reserved deformation area 330 at the support member 300 near the splicing seam 310, the deformation area of the elastic membrane 320 can be effectively increased, avoiding damage to the elastic membrane 320 due to excessive local stress. The advantage of this design is that when the flow deflector 100 switches from the first state to the second state, the elastic membrane 320 can freely unfold or contract within a larger area, thus avoiding excessive deformation in a local area. In this way, the deformation of the elastic membrane 320 can be made more uniform and stable, reducing the risk of excessive local stress. By reducing the deformation amount of the elastic membrane 320 per unit area, its durability can be improved, avoiding breakage or functional degradation due to frequent deformation during long-term use.

[0096] According to an optional embodiment, referring to Figure 5 、 Figure 6, a guiding slope 130 is provided at the joint of the deflector 100 and the support member 300, so that when the deflector 100 switches between the first state and the second state, it is easier to dock with the support member 300. By providing the guiding slope 130 at the joint of the deflector 100 and the support member 300, the deflector 100 can be switched more smoothly between the first state and the second state, avoiding jamming or non-smooth situations. The guiding slope 130 provides an additional guiding force to help the deflector 100 cooperate with the support member 300 more easily, reducing the resistance caused by poor docking. This can effectively improve the convenience of operation, especially during the dynamic switching process, avoiding unnecessary friction or jamming. Through the design of the guiding slope 130, the contact between the deflector 100 and the support member 300 becomes smoother, reducing the friction force generated between the two due to frequent switching, thereby effectively extending the service life of the components and reducing the performance degradation caused by friction loss.

[0097] The second aspect of this embodiment details an insertion part 11.

[0098] Referring to Figure 7 、 Figure 8 , an insertion part 11 includes the eddy current assembly of the above technical solution. The insertion part 11 includes an operation channel 11a, and the eddy current assembly is installed in the operation channel 11a. In this way, the insertion part 11 has the beneficial effects of the above eddy current assembly, which will not be elaborated here. In some solutions, the eddy current assembly is installed at the distal end of the insertion part 11, so as to minimize the attenuation of the eddy current guiding effect, so that the flushing liquid can still maintain a strong spiral flow effect when approaching the lesion area, thereby improving the cleaning ability of the calculus. Compared with the method of installing the eddy current assembly in the middle or proximal end of the insertion part 11, the eddy current assembly installed at the distal end can provide a more direct disturbing effect during the liquid flow process, thereby effectively promoting the discharge of the calculus.

[0099] It can be understood that the installation position, structural design of the eddy current assembly and the flow rate change of the flushing liquid are closely related. All these design elements work together to reduce the operation difficulty and time extension caused by calculus deposition during the operation to a certain extent, thereby benefiting to improve the operation efficiency and reduce the discomfort of the patient. In actual operation, by appropriately controlling the structure and position of the eddy current assembly, it can be ensured that this technical solution shows excellent cleaning effect in a complex operation environment.

[0100] The third aspect of this embodiment details an endoscope 10.

[0101] Referring to Figure 8 、 Figure 9, An endoscope 10 includes an insertion portion 11 of the above technical solution. In some solutions, the endoscope 10 includes a handle, the insertion portion 11 is mounted on the handle, a camera and a lighting source are provided at the distal end of the insertion portion 11, and an instrument insertion port is provided on the handle. Through the instrument insertion port, the instrument and the flushing liquid can be introduced into the instrument tube 11b. The combination of the eddy current assembly and the insertion portion 11 of the endoscope 10 enables the entire endoscope 10 device to have stronger flushing ability and operation flexibility during medical operations such as stone removal. Further, by optimizing the flow mode of the flushing liquid, the eddy current assembly can not only improve the treatment effect, but also reduce the risk of complications or extended operation time caused by improper operation.

[0102] The above is only the specific implementation manner 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 eddy current component, applied to an endoscope (10), wherein the insertion portion (11) of the endoscope (10) has an operation channel (11a) for passing an instrument, characterized in that: The vortex assembly comprises a guide plate (100); The guide plate (100) is arranged in the operating channel (11a) and is used to form at least a portion of the operating channel (11a) into a spiral flow channel, so that the liquid flowing through the guide plate (100) flows along a spiral path; A flow passage (110) is formed between the guide plate (100) and the operating passage (11a), and the instrument can pass through the flow passage (110); The guide plate (100) is movably arranged in the operating channel (11a), and the guide plate (100) has a first state and a second state; When the guide plate (100) is in the first state, the guide plate (100) is attached to the inner wall of the operating channel (11a), so that the cross-sectional area of ​​the flow passage (110) is not less than the cross-sectional area of ​​the device; When the guide plate (100) is in the second state, the guide plate (100) causes at least part of the operating channel (11a) to form a spiral flow channel; The guide plate (100) is connected to a driving member (200), and the driving member (200) can switch the guide plate (100) between a first state and a second state.

2. The eddy current component according to claim 1, characterized in that: When the guide plate (100) is in the second state, the cross-sectional area of ​​the flow passage (110) is smaller than, equal to, or larger than the cross-sectional area of ​​the device; And / or, the guide plate (100) is at least partially made of a memory alloy, and the driving member (200) is used to heat the memory alloy, and after the memory alloy is heated, the guide plate (100) can be switched from a first state to a second state.

3. The eddy current component according to claim 2, characterized in that: The surface of the memory alloy is coated with a thermal insulation layer; And / or, the guide plate (100) is provided with reinforcing ribs (120); And / or, at least a portion of the guide plate (100) is elastic, and the guide plate (100) can be deformed under the push of the instrument, so as to increase the cross-sectional area of ​​the operating channel (11a), thereby allowing the instrument to pass through.

4. The eddy current component according to claim 3, characterized in that: The reinforcing rib (120) extends along the extension direction of the operating channel (11a).

5. The eddy current component according to claim 1, characterized in that: The vortex assembly further comprises a support member (300), the guide plate (100) is arranged on the support member (300), and the support member (300) is arranged in the operating channel (11a); And / or, the guide plate (100) is located at the far end of the operating channel (11a).

6. The eddy current component according to claim 5, characterized in that: An instrument tube (11b) is arranged in the operation channel (11a), an instrument channel (11c) for the passage of instruments is formed in the instrument tube (11b), the support member (300) and the guide plate (100) enclose the flow passage (110), and when the guide plate (100) is in the second state, the cross-sectional area of ​​the flow passage (110) is consistent with the cross-sectional area of ​​the instrument channel (11c); And / or, the support member (300) is at least partially made of an electrothermal material, the guide plate (100) is at least partially made of a memory alloy, and the driving member (200) comprises a wire (210) connected to the support member (300), and when the wire (210) is energized, the support member (300) can be heated to cause the memory alloy to deform due to the heat; And / or, a joint seam (310) is formed between the guide plate (100) and the support member (300); when the guide plate (100) is in a first state, the joint seam (310) is closed; when the guide plate (100) is in a second state, the joint seam (310) is open; and an elastic membrane (320) is provided between the guide plate (100) and the support member (300); when the guide plate (100) switches from the first state to the second state, the elastic membrane (320) can be deformed under the pull of the guide plate (100).

7. The eddy current component according to claim 6, characterized in that: The support member (300) near the joint seam (310) is provided with a reserved deformation zone (330), and the elastic membrane (320) of the reserved deformation zone (330) is not bonded to the support member (300); And / or, the guide plate (100) is provided with a guiding slope (130) at the joint with the support member (300), so that the guide plate (100) can be more easily docked with the support member (300) when switching between the first state and the second state.

8. An insertion portion, characterized in that: Comprising the eddy current assembly according to any one of claims 1 to 7, the insert portion (11) comprises an operating channel (11a), and the eddy current assembly is installed in the operating channel (11a).

9. An endoscope, characterized in that: It comprises an inserting portion (11) as claimed in claim 8.

Images