A pressing component and a guiding sheath

Abstract

The present invention provides a pressing assembly and a guiding sheath, relating to the field of medical devices. The present invention includes a deformable tube, and the deformable tube is communicated with a reflux joint; the deformable tube includes an elastic tube, and the elastic tube is made of an elastic material. When the deformable tube is subjected to force, the elastic tube bends, so that the flow cross-section inside the elastic tube changes, thereby changing the flow rate of the elastic tube. Compared with the prior art, the present invention realizes the adjustment of the flow rate of the reflux channel by controlling the bending degree of the elastic tube, making the flushing process more controllable. By optimizing the fluid flow state in the reflux channel, the present invention can, to a certain extent, reduce the fluctuation of the internal pressure in the body, reduce the potential damage risk to tissues, and at the same time improve the effect of lithotripsy flushing and discharge, and improve the safety and stability of medical operations.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a pressing component and a guiding sheath. Background Art

[0002] A guiding sheath is a medical device that plays an auxiliary role during endoscopic examinations and treatments. It is usually made of flexible materials and has a certain rigidity to balance the insertion force and operating stability. The guiding sheath is mainly used in conjunction with an endoscope. By pre-inserting it into the body cavity, it provides a stable guiding channel for the endoscope, enabling the endoscope to smoothly enter the target area and reducing the interference or trauma that may be caused by directly operating the endoscope.

[0003] After the endoscope is inserted into the guiding sheath, a return channel is formed between the guiding sheath and the endoscope, and the guiding sheath is connected to a negative pressure suction device. Through this return channel, the negative pressure suction device can extract body fluids. However, during the negative pressure suction process, the pressure inside the return channel may fluctuate greatly, which may cause discomfort or damage to the fragile body tissues. Summary of the Invention

[0004] To solve the above problems, the present application provides a pressing component and a guiding sheath.

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

[0006] A pressing component is applied to a guiding sheath. The guiding sheath includes an operating handle and a return joint. The pressing component includes a deformable tube, and the deformable tube is communicated with the return joint;

[0007] The deformable tube includes an elastic tube made of an elastic material. When the deformable tube is stressed, the elastic tube bends, so that the flow cross-section inside the elastic tube changes, thereby changing the flow rate of the elastic tube.

[0008] In a second aspect, the present application provides a guiding sheath, adopting the following technical solution:

[0009] A guiding sheath includes the pressing component described in the above technical solution.

[0010] The present invention has the following advantages and beneficial effects:

[0011] This application adjusts the flow rate of the flexible tube by controlling its bending degree, thereby affecting the flow rate of the reflux joint and achieving the regulation of the flow rate of the reflux channel. During the negative pressure suction process, when the internal pressure of the reflux channel drops, appropriately increasing the bending degree of the flexible tube can reduce its flow cross-section and the flow rate, so as to inhibit the further drop of the pressure in the reflux channel and raise the pressure back to a reasonable range. On the contrary, when the internal pressure of the reflux channel rises, the bending degree of the flexible tube can be reduced to increase its flow cross-section, thereby increasing the flow rate and promoting the reduction of the pressure in the reflux channel. Through the above regulation, the pressure inside the reflux channel is maintained within an appropriate range, avoiding excessive negative pressure acting on the fragile tissues in the body, thus reducing the risk of tissue damage. In addition, by adjusting the fluid flow in the reflux channel in this way, the flushing process becomes more controllable, improving the safety and stability of medical operations.

[0012] Furthermore, this application can also adjust the flow velocity of the liquid in the reflux channel by changing the flow cross-section of the flexible tube, thereby optimizing the flushing effect of the calculus. Specifically, during the process of discharging the calculus through the reflux channel, the bending degree of the flexible tube can be periodically changed to make the flow velocity of the liquid in the reflux channel change periodically. When the flow velocity is relatively fast, the liquid in the reflux channel can drive the calculus to flow more effectively; when the flow velocity decreases, the liquid in the reflux channel forms pressure fluctuations in the local area, helping to loosen or push the calculus and improving the calculus removal efficiency. This intermittent flow effect helps to reduce the retention of the calculus in the operation area, making it easier to be discharged, thereby shortening the operation time, reducing the risks and discomforts of the patient during the operation, and improving the overall efficiency and safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 is the first structural schematic diagram of the embodiment of this application;

[0015] Figure 2 is the second structural schematic diagram of the embodiment of this application;

[0016] Figure 3 is the exploded view of the embodiment of this application;

[0017] Figure 4 is Figure 1 the enlarged structural schematic diagram of part A in

[0018] Figure 5It is the front view of the flexible tube;

[0019] Figure 6 It is the structural schematic diagram of the flexible tube;

[0020] Figure 7 It is the first cross-sectional view of the embodiment of the present application;

[0021] Figure 8 It is the front view of the embodiment of the present application;

[0022] Figure 9 It is the second cross-sectional view of the embodiment of the present application.

[0023] The markings in the figure are:

[0024] 10. Guide sheath; 11. Return joint; 12. Operating handle; 100. Deformable tube; 110. Flexible tube; 111. Depression; 112. Bending area; 120. Rigid tube; 200. Guide member; 210. Contact portion; 211. Arc surface; 300. Guide member; 310. Guide groove. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts fall within the scope protected by the present invention.

[0026] The terms "first", "second", etc. in the description 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 may 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 may be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0027] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative distances of each component from the user in the usage environment. Among them, the end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0028] In the lithotripsy surgery of the urinary system, the endoscope enters the renal pelvis through the guiding sheath. After using the laser to break up the stones, the flushing liquid and the crushed stones are discharged through the reflux channel formed between the endoscope and the guiding sheath. However, the inventor found that during the actual operation, due to a certain axial movement of the endoscope relative to the guiding sheath, the flow area of the reflux channel changes accordingly. At the same time, the crushed stones are easily retained in the reflux channel, further reducing the local flow cross-section. As a result, when the flow rate of the flushing liquid is constant, the pressure of the internal body fluid increases, increasing the risk of tissue damage. In addition, when the retained crushed stones are suddenly discharged, the flow area of the reflux channel increases instantaneously, resulting in a sudden drop in the pressure of the internal body fluid, which may also cause damage to the tissue.

[0029] To solve the above problems, the present invention provides a pressing component, which dynamically adjusts the flow cross-section by adjusting the bending degree of the elastic tube, and then changes the flow rate of the elastic tube to realize the real-time regulation of the flow rate of the reflux channel. In this way, the pressure inside the reflux channel is maintained within an appropriate range, reducing the damage to the internal tissues caused by pressure fluctuations, and improving the stability and safety of lithotripsy flushing.

[0030] The following Figures 1 to 9 is combined with the attached drawings, and a pressing component and a guiding sheath provided by the present application are described in detail through specific embodiments and their application scenarios.

[0031] The first aspect of this embodiment describes a pressing component in detail.

[0032] Referring to Figure 1 and Figure 2 , the embodiment of the present application discloses a pressing component, which is applied to the guiding sheath 10. Exemplarily, the pressing component is detachably connected to the guiding sheath 10. For example, the pressing component can be connected to the guiding sheath 10 by means of snap connection or threaded connection to achieve convenient disassembly and assembly and improve the adaptability. In some solutions, the pressing component is integrally connected to the guiding sheath 10. For example, the pressing component can be connected to the guiding sheath 10 by means of fixed connection such as welding or bonding to enhance the structural stability and reduce possible connection loosening problems.

[0033] In some solutions, the guiding sheath 10 includes an operation handle 12 and a reflux joint 11, and the pressing component can be connected to the reflux joint 11. That is to say, the pressing component can be connected to the reflux joint 11 by means of detachable or fixed connection, so as to adjust the pressure inside the reflux channel. During the negative pressure suction process, the function of the pressing component is to maintain the pressure inside the reflux channel within an appropriate range, avoid excessive adsorption or damage to the fragile tissues in the body caused by too high negative pressure, thereby reducing the intraoperative risk and improving the safety and stability of the medical operation. In addition, this adjustment method can also avoid blood vessel or tissue damage caused by sudden pressure changes and improve the intraoperative comfort of the patient.

[0034] In some solutions, referring to Figure 2 , Figure 3 , the pressing component includes a deformable tube 100. The deformable tube 100 is a hollow and open-ended tubular structure that can adjust the fluid flow situation through deformation to optimize the negative pressure suction effect of the reflux channel. Exemplarily, the deformable tube 100 can adopt a cylindrical tubular structure, which is beneficial for uniform deformation and ensures the flow stability during the adjustment process.

[0035] During use, the deformable tube 100 is connected to the reflux joint 11. The negative pressure device can be connected to one end of the deformable tube 100 and draw the liquid in the reflux interface through the deformable tube 100, thereby driving the liquid flow in the reflux channel. By controlling the deformation degree of the deformable tube 100, its flow cross-section can be dynamically adjusted to adapt to different flow rate requirements and optimize the negative pressure regulation effect during the operation.

[0036] In some solutions, referring to Figure 2 , Figure 3 , the deformable tube 100 includes an elastic tube 110. The elastic tube 110 is made of an elastic material. When the deformable tube 100 is subjected to force, the elastic tube 110 bends, so that the flow cross-section inside the elastic tube 110 changes, thereby changing the flow rate of the elastic tube 110. This characteristic of the elastic tube 110 enables it to act as a dynamic adjustment element in the reflux channel. By applying force to the deformable tube 100, the elastic tube 110 bends and deforms, thereby controlling the flow rate during the negative pressure suction process and optimizing the fluid management effect.

[0037] In practical applications, the elastic tube 110 can be made of silicone, medical-grade elastic polymer or other materials with good elastic recovery ability. The selection of these materials enables the elastic tube 110 to have sufficient flexibility to bend moderately under the action of force and good resilience to return to its original state after the external force is released to ensure the stability of the fluid channel.

[0038] In some solutions, the elastic tube 110 is connected to the reflux joint 11 and serves as a part of the reflux channel. When the negative pressure device suctions the reflux channel, the fluid flows through the elastic tube 110. By applying force to the deformable tube 100, the deformable tube 100 moves relative to the operation handle 12, so that the elastic tube 110 bends. For example, by the operator pushing the deformable tube 100 to move, the elastic tube 110 bends, thereby changing its flow cross-section. When the bending degree of the elastic tube 110 increases, its inner diameter locally shrinks, the flow cross-section decreases, resulting in a decrease in the flow rate, and further inhibiting the further decrease in pressure during the negative pressure suction process, so that the internal pressure of the reflux channel is maintained within a reasonable range. On the contrary, when the bending degree of the elastic tube 110 decreases, its flow cross-section increases, and the flow rate increases accordingly, thereby promoting fluid discharge and avoiding excessive pressure in the reflux channel.

[0039] The design of this solution can not only be used for negative pressure control, but also optimize the stone flushing effect. During the operation, by periodically adjusting the bending degree of the elastic tube 110, the fluid flow rate changes periodically. When the flow rate is fast, the scouring force of the fluid increases, which helps to drive the stone to flow; when the flow rate decreases, the locally formed pressure fluctuation can help loosen or push the stone, making it easier to enter the return channel and be discharged. This intermittent flow pattern helps to reduce the retention of stones in the return channel, improve the stone removal efficiency, thereby shortening the operation time, reducing the discomfort of the patient, and improving the safety and success rate of the operation.

[0040] Through the deformation control of the elastic tube 110, the flow rate in the return channel can be dynamically adjusted in this solution, so as to effectively control the intensity of negative pressure suction and avoid unnecessary damage to tissues caused by pressure fluctuations. At the same time, this design can also improve the stone flushing effect, make the fluid flow more controllable, reduce the residual stones during the operation, and reduce the operation risk. In addition, through reasonable material selection and structural optimization, the elastic tube 110 has good durability and recovery ability, thus ensuring the stability of long-term use and improving the overall performance and reliability of the medical device.

[0041] In some solutions, referring to Figure 1 、 Figure 2 , a scissor-like handle structure is formed between the deformation tube 100 and the operation handle 12, enabling the operator to more conveniently adjust the bending degree of the elastic tube 110. Specifically, the operator holds the operation handle 12 and the deformation tube 100 with the hand, and by clenching or loosening the hand, the deformation tube 100 rotates relative to the operation handle 12, so that the deformation tube 100 approaches or moves away from the operation handle 12, thereby controlling the bending degree of the elastic tube 110 and realizing the adjustment of the flow cross-section.

[0042] The design of this scissor-like handle structure has significant advantages in the operation mode. First of all, it makes the adjustment process more ergonomic. The operator can adjust the hand posture more naturally when applying force, reducing the fatigue caused by long-term operation. Compared with the traditional knob-type or push-pull type adjustment mechanism, the scissor-like handle structure can use the natural clamping and opening actions of the fingers for adjustment, making the force application more accurate and smooth. In addition, since the operation handle 12 and the deformation tube 100 form a handle structure similar to scissors, the force application direction is more intuitive, avoiding misadjustment caused by improper operation and improving the reliability and stability of the operation.

[0043] In actual use, the operator can finely adjust the flow cross-section of the elastic tube 110 by gripping or loosening the hand to different degrees. For example, when it is necessary to reduce the flow rate, the operator can increase the gripping force, causing the deformable tube 100 to approach the operating handle 12, increasing the bending degree of the elastic tube 110, thereby reducing the flow cross-section and the fluid throughput, and suppressing the further decrease in pressure in the return channel. When it is necessary to increase the flow rate, the gripping force can be appropriately relaxed, causing the deformable tube 100 to move away from the operating handle 12, reducing the bending degree of the elastic tube 110, increasing its flow cross-section, thereby enhancing the flow capacity and promoting fluid discharge. This intuitive operation method can not only quickly respond to intraoperative needs but also improve the stability of negative pressure suction, making the pressure regulation of the return channel more accurate.

[0044] In addition, this structural design also improves the gripping comfort of the operating handle 12. Since traditional handles may be relatively single and not easily adaptable to the hand shapes of different operators, the scissor-like structure provides a more flexible gripping method, enabling operators with different hand sizes to operate comfortably. At the same time, this structure can reduce the burden during single-handed operation, making the operation more stable and improving the accuracy of intraoperative control.

[0045] According to an optional embodiment, referring to Figure 3 , Figure 4 , the pressing component further includes a guiding member 200. When the elastic tube 110 is bent, at least part of the guiding member 200 can abut against the elastic tube 110 to push at least part of the elastic tube 110 to dent inwardly. This design can provide more precise control during the process of adjusting the flow cross-section of the elastic tube 110, making the shape of each bend more predictable, and ensuring that the elastic tube 110 does not bulge outward or undergo other abnormal deformations when deformed under force, thereby maintaining the stability of the flow cross-section.

[0046] During the process when the deformable tube 100 is stressed and displaced relative to the operating handle 12, the elastic tube 110 will bend accordingly, and the guiding member 200 plays a role in this process. When the elastic tube 110 bends to one side, the guiding member 200 can provide support, making the bending process more controlled and preventing the elastic tube 110 from undergoing irregular deformations during the bending process. For example, in the absence of the guiding member 200, the elastic tube 110 may exhibit uneven bending or local bulges due to different material properties or force application methods, resulting in unpredictable changes in the flow cross-section and affecting the accuracy of flow rate regulation. By the intervention of the guiding member 200, the deformation direction of the elastic tube 110 can be made more consistent, ensuring that the change in throughput during each adjustment is within the expected range and enhancing the stability and controllability of fluid management.

[0047] To further optimize the adjustment effect, the shape and material of the guiding member 200 can be arranged according to specific requirements. Exemplarily, the guiding member 200 can be a rigid structure, such as an arc-shaped plate, a limiting block, or a support bar with a certain elasticity, to provide a clear force application path when the elastic tube 110 bends. Its surface can be optimized, for example, by adopting a smooth transition curved surface structure to reduce friction with the elastic tube 110, avoid damaging the surface of the elastic tube 110, and ensure that the elastic tube 110 can smoothly conform to the shape of the guiding member 200 during the bending process, thereby ensuring the consistency and repeatability of the deformation.

[0048] In some solutions, the guiding member 200 can be arranged at a specific position of the deformation tube 100 and form a defined fit with the elastic tube 110, so that the elastic tube 110 can only deform in a set direction when bending. For example, the guiding member 200 can be arranged on the outer side or a local area of the elastic tube 110, so that the elastic tube 110 will not bulge outwards during the bending process, but will be controlled to sink inwards. This design can ensure that the change of the flow cross-section is more linear, avoid flow rate fluctuations caused by uncertain deformation directions of the elastic tube 110, and make the flow rate adjustment more stable.

[0049] During use, this solution can effectively improve the controllability of the adjustment of the elastic tube 110, enabling the operator to more precisely adjust the flow rate, especially in scenarios where fine control of the negative pressure suction intensity or flushing flow rate is required. For example, during a surgical procedure, if the flow rate needs to be gradually increased or decreased, the operator can ensure that the deformation of the elastic tube 110 is within the expected range through the guiding member 200, and will not cause the flow rate adjustment to get out of control due to excessive deformation or direction deviation. In addition, the guiding member 200 can also provide a certain buffering effect, so that the elastic tube 110 will not suddenly fold or be subjected to excessive local force when subjected to a large external force, thereby extending the service life of the elastic tube 110 and improving the safety and stability of medical operations.

[0050] According to an alternative embodiment, referring to Figure 4 、 Figure 5 , the elastic tube 110 is provided with a recess 111, and the recess 111 is recessed towards the central axis side of the elastic tube 110 to guide at least part of the elastic tube 110 to sink towards the inside of the elastic tube 110 during the bending process. This design enables the elastic tube 110 to have a certain preset shape in the unloaded state, that is, a recessed area towards the inside is pre-formed on part of its tube wall, so that it is more likely to deform in a predetermined direction when bending, improving the predictability and control accuracy of the change of the flow cross-section.

[0051] Since the flexible tube 110 itself has a recessed portion 111, when it is bent under force, the recessed portion 111 can serve as a starting guiding region for deformation, causing the flexible tube 110 to preferentially sag in a set direction, rather than expanding randomly towards the outside or generating uncontrollable deformation. This structure helps ensure that the change in the flow cross-section is relatively consistent during each bending, avoiding instability in flow regulation caused by deviations in the deformation direction. For example, during negative pressure suction, when an operator applies pressure to bend the flexible tube 110, the recessed portion 111 will preferentially sag inward into the tube, reducing the flow cross-section, thereby reducing the liquid flow rate and suppressing a further drop in pressure within the reflux channel. When the pressure decreases, the flexible tube 110 returns to its original shape, increasing the flow cross-section and correspondingly increasing the fluid discharge rate.

[0052] Furthermore, the shape and size of the recessed portion 111 can be optimized according to specific application requirements. Exemplarily, the recessed portion 111 can be a groove-like structure extending along the axial direction of the flexible tube 110, enabling the entire flexible tube 110 to have a consistent deformation tendency in the axial direction, thereby ensuring the uniformity of deformation when the entire tube segment is bent. In addition, the recessed portion 111 can also be multiple recessed points distributed locally, such that the flexible tube 110 can form a certain folding pattern when bent, thereby more precisely controlling the change amplitude of the flow cross-section.

[0053] Compared with the flexible tube 110 without the recessed portion 111, this solution can significantly improve the controllability of the deformation direction, avoiding the problem of a random deformation path occurring in the flexible tube 110 during bending, which leads to a decrease in the flow regulation accuracy. For example, in the design of the traditional flexible tube 110, different-direction protrusions or folds may occur during the bending process due to uneven local stress, making it difficult to predict the change in the flow cross-section. By setting the recessed portion 111, the deformation direction of the flexible tube 110 can be effectively limited, keeping the flow rate change within the expected range during each adjustment and improving the stability of negative pressure suction and fluid regulation.

[0054] In addition, this design can also extend the service life of the flexible tube 110. Since the preset shape of the recessed portion 111 can guide the deformation to occur in a specific region, making the stress on the pipe material more uniform during the bending process, avoiding material fatigue or damage caused by local excessive stress concentration. At the same time, since the bending form is more controllable, it can also reduce the risk of pipeline blockage caused by abnormal folding, improving the long-term stability and reliability of the equipment.

[0055] In specific implementation, the design of the recessed portion 111 can be optimized in combination with material properties. For example, the elastic tube 110 can be made of silicone, polyurethane, or other highly elastic materials, and the recessed portion 111 can be preset during the molding process to ensure that it deforms along a preset path when subjected to force. In addition, materials with different hardnesses or different thicknesses can be used in the recessed portion 111 area of the elastic tube 110 to further precisely control the force-bearing situation in the deformation area, making it more controlled during the bending process. Exemplarily, the recessed portion 111 is made of a material with a relatively lower hardness than other areas of the elastic tube 110, and the material thickness of its corresponding area is relatively thinner than that of the surrounding areas.

[0056] According to an alternative embodiment, referring to Figure 5 , Figure 6 , the elastic tube 110 includes a bending zone 112. From the side facing the operating handle 12 to the bending zone 112, the width of the elastic tube 110 gradually decreases in its own axial direction. Exemplarily, the first side of the elastic tube 110 faces the operating handle 12, the second side of the elastic tube 110 faces away from the operating handle 12, and the bending zone 112 is located in the area between the first side and the second side of the elastic tube 110. Specifically, when extending from the side facing the operating handle 12 to the bending zone 112, the width of the elastic tube 110 gradually decreases, and when extending from the bending zone 112 to the side away from the operating handle 12, the width of the elastic tube 110 gradually increases. It can be understood that the width of the elastic tube 110 mentioned here refers to the width of the elastic tube 110 in its axial direction.

[0057] This structural design makes the bending of the elastic tube 110 more concentrated, ensuring that when the deformable tube 100 is subjected to force, the elastic tube 110 preferentially deforms in the bending zone 112, thereby improving the controllability of the deformation. Since the width of the bending zone 112 is small and its structural stiffness is relatively low, it is more likely to undergo local deformation when subjected to force without causing uncontrolled bending of other parts of the elastic tube 110, thus optimizing the accuracy of flow regulation. In addition, since the deformation of the bending zone 112 is guided by the change in width, it can further improve the stability of the cross-sectional change of the fluid channel and reduce the uncertainty during the flow regulation process.

[0058] According to an alternative embodiment, referring to Figure 4 , Figure 6 , from the bending zone 112 to the side facing away from the operating handle 12, the width of the elastic tube 110 gradually increases in its own axial direction.

[0059] By designing in this way, the length of the partial area between the first side and the second side of the flexible tube 110 along the radial direction of the flexible tube 110 can be minimized. Since the width of the bending area 112 is the smallest, compared with other areas, the bending radius of this area is smaller. Therefore, a stable bending shape can be quickly formed after being stressed, making the change of the flow-through area of the fluid channel more uniform and predictable. In addition, on the side far from the bending area 112, the width of the flexible tube 110 gradually increases, making the structure of this area relatively more stable, and can provide certain support when the flexible tube 110 bends, avoiding the instability of the deformation path or excessive deformation during the deformation process.

[0060] This design with width variation not only improves the bending control accuracy of the flexible tube 110, but also optimizes its hydrodynamic characteristics. For example, at the bending area 112, due to the small width and thin tube wall, it can deform under a small external force, making the flow rate regulation more sensitive. In the area far from the bending area 112, due to the large width, the tube wall stiffness is relatively high, which can play a supporting role to ensure that the deformation process is stable and controllable, avoiding the situation that the deformed tube 100 causes unstable flow rate regulation due to shaking.

[0061] In addition, this design can also optimize the operation stability of the deformed tube 100 to a certain extent. When the deformed tube 100 moves under force, due to the small width of the bending area 112, the deformation of the flexible tube 110 is mainly concentrated in this area, making the rotation center of the deformed tube 100 more fixed, avoiding the adjustment error caused by the uncertain deformation position. This enables the operator to more accurately control the flow rate change when adjusting the bending degree of the flexible tube 110, improving the reliability and stability of the operation.

[0062] At the same time, the design with a short length of the bending area 112 can also control the stiffness of the flexible tube 110, preventing the flexible tube 110 from swinging greatly when the deformed tube 100 shakes due to being too long during use. This is particularly important during surgical operations because excessive swinging may lead to unstable adjustment and even affect the accuracy of the operation. By optimizing the length of the bending area 112, while ensuring bending flexibility, the additional shaking of the deformed tube 100 during operation can be reduced, improving the stability and operability of the device.

[0063] Specifically, referring to Figure 5 , from the top to the bottom of the figure, the width of the flexible tube 110 (i.e., the length of the flexible tube 110 from left to right) gradually decreases until the bending area 112 in the middle of the flexible tube 110, where the width of the flexible tube 110 reaches the minimum. Subsequently, continuing along the top-to-bottom direction of the figure, the width of the flexible tube 110 gradually increases.

[0064] Since the width of the bending zone 112 is the smallest, the degree of bending in this area is easier to control, ensuring that the change in the flow-through cross-section is uniform and predictable. For example, during negative pressure suction, the deformation tube 100 is stressed, causing the elastic tube 110 to bend, thereby changing the flow-through cross-section. When the deformation amount of the bending zone 112 is strictly limited, the flow rate adjustment can be made more accurate, avoiding excessive flow rate fluctuations or unstable adjustment caused by uncontrolled deformation of the elastic tube 110.

[0065] In addition, the design in which the width of the elastic tube 110 gradually increases after the bending zone 112 can also play a certain supporting and guiding role. When the deformation tube 100 moves relative to the operating handle 12, the deformation of the elastic tube 110 is most obvious near the bending zone 112. In the area outside the bending zone 112, due to the gradually increasing width, the stiffness of this part is relatively high, which can play a certain constraining role on the bending shape. This design can effectively reduce the unstable situation of structural deformation caused by excessive bending, and at the same time avoid outward bulging or other uncontrollable deformations when the elastic tube 110 bends, making the flow-through cross-section change within a controlled range and improving the accuracy of flow rate adjustment.

[0066] According to an optional embodiment, referring to Figure 4 , Figure 5 , the bending zone 112 is located on the side of the central axis of the elastic tube 110 away from the operating handle 12. Such a design enables the elastic tube 110 to bend more quickly when the deformation tube 100 approaches the operating handle 12, thereby quickly adjusting the size of the flow-through cross-section and improving the response speed of flow rate adjustment.

[0067] Specifically, when the deformation tube 100 approaches or moves away from the operating handle 12, even if the moving distance is small, it can significantly change the degree of bending of the elastic tube 110, causing the flow-through cross-section to change rapidly, thereby more effectively adjusting the flow rate in the return channel. This design optimizes the adjustment sensitivity, enabling the operator to have a more obvious control effect on the fluid flow in the return channel when applying a small force or making fine adjustments.

[0068] In addition, since the bending zone 112 is located on the side of the central axis of the elastic tube 110 away from the operating handle 12, the deformation direction of the elastic tube 110 during bending is more predictable, avoiding unstable factors during the deformation process. For example, if the bending zone 112 is located on the side of the central axis close to the operating handle 12, it may cause the deformation path of the elastic tube 110 to be unstable when the deformation tube 100 applies force, thereby affecting the accuracy of flow rate adjustment. By setting the bending zone 112 on the side away from the operating handle 12, it can be ensured that the elastic tube 110 always bends in a specific direction when stressed, making the adjustment process more controllable and reducing flow rate fluctuations caused by accidental deformations.

[0069] According to an alternative embodiment, referring to Figure 4 , Figure 5 In the axial direction of the elastic tube 110, the width of the elastic tube 110 on the side away from the operating handle 12 is greater than the width of the elastic tube 110 on the side facing the operating handle 12. Specifically, during the bending process of the elastic tube 110 under force, since the portion with a larger width has a relatively greater structural stability, its bending tendency will tend to bend toward the side with a smaller width, that is, toward the side close to the operating handle 12.

[0070] With this structural design, when the elastic tube 110 is deformed, its internal flow cross section can be adjusted relatively greatly with a small rotation angle of the deformable tube 100. This can improve the sensitivity of the flow rate adjustment and make the fluid flow rate change more controllable. On the other hand, it helps to reduce the operation range in actual use and improve the convenience and accuracy of adjustment.

[0071] It is understandable that the “width” mentioned here refers to the size of the elastic tube 110 in the axial direction, that is, the cross-sectional size measured along the axis direction of the elastic tube 110 itself, rather than the thickness of the wall of the elastic tube 110. Through the above design, the adjustment range of the flow cross section can be optimized to a certain extent, making the flow regulation more stable, while reducing the overall movement of the deformable tube 100, which is beneficial to improving the controllability and safety of the surgical operation.

[0072] According to an alternative embodiment, referring to Figure 7 , Figure 8 The deformable tube 100 further includes a rigid tube 120, the rigidity of which is greater than that of the elastic tube 110, the rigid tube 120 is connected to the elastic tube 110, the guide 200 is connected to the rigid tube 120, and at least a portion of the guide 200 can abut against the elastic tube 110 when the elastic tube 110 is bent, so as to push a portion of the elastic tube 110 to deform toward the inner side of the elastic tube 110. The main function of this design is to guide and limit the deformation direction of the elastic tube 110, to ensure that the elastic tube 110 will not bulge out or deform uncontrollably when it is bent under force, but will always shrink toward the inner side, so that the adjustment of the flow cross section is more controllable.

[0073] The presence of the rigid tube 120 provides a stable support, so that the deformation tube 100 will not affect the adjustment accuracy during operation due to excessive deformation of the elastic tube 110. At the same time, since the rigid tube 120 itself is not easy to deform, when the operator applies force, the deformation amplitude of the elastic tube 110 will be constrained to a certain extent, making the adjustment process more accurate and avoiding adjustment errors caused by excessive deformation of the elastic tube 110 or unstable deformation path.

[0074] In addition, the cooperation design of the guide member 200 and the rigid tube 120 enables the elastic tube 110 to form a preset deformation mode when bent, improving the sensitivity of flow rate adjustment. For example, when the deformation tube 100 approaches the operation handle 12 side, the guide member 200 can contact the elastic tube 110 and exert a certain binding force, causing the elastic tube 110 to form a more regular concave deformation when bent, thereby ensuring the uniformity of the change in the flow cross-section and avoiding uneven flow rate adjustment or deformation lag.

[0075] According to an alternative embodiment, referring to Figure 4 、 Figure 9 , at the contact portion where the guide member 200 is used to contact the elastic tube 110, there is an abutting portion 210, and the abutting portion 210 is provided with an arc surface 211. In the case where the elastic tube 110 is bent, the elastic tube 110 fits on the arc surface 211. When the elastic tube 110 is bent, its surface can fit on the arc surface 211, thereby optimizing the deformation process of the elastic tube 110 and ensuring the stability and controllability of the deformation.

[0076] Since the arc surface 211 will contact the elastic tube 110 when the deformation tube 100 moves relative to the operation handle 12, the bending deformation of the elastic tube 110 will occur around this contact portion, enabling the elastic tube 110 to gradually bend along the arc surface 211 instead of forming a local sharp bend. In this way, the arc surface 211 can effectively guide the deformation path of the elastic tube 110, avoiding excessive bending angles or uneven deformation, thereby improving the accuracy and repeatability of flow rate adjustment.

[0077] In particular, during the deformation process of the elastic tube 110, if excessive bending occurs in a certain area, it may cause excessive local stress on the material, leading to stress concentration, making the bent area more prone to fatigue damage and even eventual breakage. However, through the design of the arc surface 211, the maximum bending position of the elastic tube 110 always fits on the arc surface 211, forming a uniformly stressed deformation area, thereby reducing the concentration of local stress and improving the service life and durability of the elastic tube 110.

[0078] Furthermore, the arc surface 211 provides a structural support function, enabling the elastic tube 110 not to deviate in an unexpected deformation direction during the deformation process, but to deform stably along a preset trajectory. This not only helps to maintain the stability of the flow rate in the return channel but also can avoid flow rate adjustment errors caused by uneven deformation of the elastic tube 110, thereby improving the reliability and safety of medical operations.

[0079] According to an alternative embodiment, referring to Figure 7 、 Figure 8, the first end of the flexible tube 110 is connected to the reflux joint 11, and the shape of the connection between the reflux joint 11 and the flexible tube 110 matches the shape of the end of the flexible tube 110.

[0080] According to an optional embodiment, the second end of the flexible tube 110 is connected to the rigid tube 120, and the shape of the connection between the rigid tube 120 and the flexible tube 110 matches the shape of the end of the flexible tube 110.

[0081] Through this structural matching design, the connection between the flexible tube 110 and the reflux joint 11 is made tighter, which helps to reduce the risk of liquid leakage and ensure the fluid transmission stability of the reflux channel. In addition, the shape-matching design can improve the connection reliability and avoid affecting the fluid flow stability due to loosening at the connection during negative pressure suction or deformation adjustment.

[0082] In addition, the shape-matching connection method can also optimize the assembly process, enabling the flexible tube 110 to be more conveniently installed on the reflux joint 11 and the rigid tube 120, and can also be quickly replaced when necessary, improving the maintenance convenience and service life of the equipment. During medical operations, this matching connection can also reduce the risks brought by unstable connections, ensure the accuracy of negative pressure suction and flow regulation, and thus enhance the overall operation safety and reliability.

[0083] Exemplarily, referring to Figure 5 、 Figure 6 , grooves are respectively provided at both ends of the flexible tube 110. The rigid tube 120 is inserted into the groove at one end of the flexible tube 110, and the reflux joint 11 is inserted into the groove at the other end of the flexible tube 110. Through this insertion method, the flexible tube 110 can be firmly connected to the rigid tube 120 and the reflux joint 11, thereby ensuring the continuity of the fluid channel and improving the stability of the overall structure.

[0084] To further enhance the sealing effect, glue can be coated in the grooves to form a firm bond between the flexible tube 110 and the rigid tube 120 and the reflux joint 11, thereby effectively preventing liquid leakage. In addition, in some solutions, welding can also be used to fix the flexible tube 110 to the rigid tube 120 and the reflux joint 11. For example, if the flexible tube 110 is made of materials suitable for welding, through hot melt welding or ultrasonic welding, etc., the materials at the end of the flexible tube 110 and the rigid tube 120 and the reflux joint 11 can be fused with each other to form a more tightly sealed connection.

[0085] Through the above-mentioned sealing connection method, it can be ensured that during the bending deformation process of the elastic tube 110, both ends thereof still maintain a reliable sealing state, avoiding the interface leakage problem caused by deformation. This not only helps to maintain the negative pressure suction effect of the reflux channel, but also can prevent external air or pollutants from entering the reflux channel, improving the stability of fluid regulation and the safety of medical operations. In addition, while ensuring the sealing performance, this connection method also retains a certain possibility of disassembly and replacement, facilitating the maintenance and replacement of the device and improving the overall service life.

[0086] According to an optional embodiment, referring to Figure 8 、 Figure 9 , a guide member 300 is connected between the operation handle 12 and the deformation tube 100 to guide the deformation tube 100 to move along its own central axis direction towards the bending region 112 during the deformation process of the deformation tube 100 towards the operation handle 12 side. Through this design, a stable guiding effect can be provided for the rotation of the deformation tube 100, ensuring that the deformation tube 100 moves along a predetermined trajectory, thereby improving the controllability of the deformation of the elastic tube 110.

[0087] When the deformation tube 100 moves closer to the operation handle 12 side, affected by the guide member 300, its movement trajectory will be towards the bending region 112, causing the two ends of the elastic tube 110 to gradually approach. This movement trend can accelerate the bending process of the elastic tube 110, enabling the elastic tube 110 to deform under a smaller operating force, thereby improving the adjustment efficiency. At the same time, as the elastic tube 110 bends, the trend of its two ends approaching relatively can also optimize the deformation direction of the elastic tube 110, making it bend more evenly, avoiding local stress concentration, and reducing the risk of material fatigue and damage caused by uneven stress.

[0088] In addition, the design of the guide member 300 can also provide a certain support when the deformation tube 100 returns to its initial position, enabling the deformation tube 100 to be stably reset, so as to ensure that the flow cross-section of the elastic tube 110 can return to the set range after the external force is released, guaranteeing the stability of the fluid channel. This design method not only improves the sensitivity of adjusting the flow rate of the reflux channel, but also enhances the durability and operation convenience of the device, making medical operations more accurate and efficient.

[0089] According to an optional embodiment, the guide member 300 is connected to the operating handle 12. The guide member 300 is provided with a guide groove 310 that extends from a side away from the operating handle 12 to a side closer to the operating handle 12. The deformation tube 100 is slidably engaged with the guide groove 310, and in the direction from away from the operating handle 12 to closer to the operating handle 12, the distance between the guide groove 310 and the bending region 112 gradually decreases. When the deformation tube 100 slides along the guide groove 310, the geometric structure of the guide groove 310 guides the deformation tube 100 to move towards the bending region 112, enabling the elastic tube 110 to more precisely control the bending position during the deformation process. Since the distance between the guide groove 310 and the bending region 112 gradually decreases, during the process of the deformation tube 100 moving towards the operating handle 12, the bending of the elastic tube 110 will be more concentrated in a specific area, thereby avoiding the randomness of the bending position and improving the adjustment accuracy of the flow cross-section.

[0090] In addition, through the guiding effect of the guide groove 310, the movement of the deformation tube 100 is not simply a translation or rotation, but a movement under a controlled trajectory. Such a movement mode can optimize the deformation process of the elastic tube 110 and reduce the influence brought by sudden deformation or uneven deformation. Especially in scenarios where fine adjustment of the flow rate of the reflux channel is required, this guiding structure can improve the stability and controllability of the operation, enabling medical personnel to more precisely control the fluid flow and enhancing the use effect and safety of the medical device.

[0091] The second aspect of this embodiment details a guiding sheath.

[0092] Referring to Figure 8 , a guiding sheath includes a pressing component of the above embodiment. The guiding sheath 10 includes an operating handle 12 and a reflux joint 11, and the pressing component is installed at the position of the reflux joint 11. In this way, the guiding sheath 10 has the beneficial effects of the above pressing component, which will not be elaborated here.

[0093] The combination of the pressing component and the reflux joint 11 enables the guiding sheath 10 to adjust the flow rate of the reflux joint 11 by controlling the deformation of the pressing component, thereby realizing the fluid regulation of the reflux channel. In specific implementation, an operator can apply a force to the pressing component through the operating handle 12, causing the elastic tube 110 in the pressing component to bend controllably, thereby changing its flow cross-section to adjust the flow rate and flow volume in the reflux channel.

[0094] This solution can adaptively adjust the flow-through cross-section of the elastic tube 110 as the pressure inside the reflux channel changes during the negative-pressure suction process. For example, when the pressure inside the reflux channel drops, the bending degree of the elastic tube 110 is appropriately increased, causing the flow-through cross-section to shrink, thereby reducing the flow rate and inhibiting the further drop in the pressure of the reflux channel, and enabling it to rise back to a reasonable range. Conversely, when the pressure inside the reflux channel rises, the bending degree of the elastic tube 110 is reduced, increasing the flow-through cross-section to increase the flow rate, thereby reducing the pressure inside the reflux channel and maintaining it within an appropriate range.

[0095] 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. A pressing assembly is applied to a guiding sheath (10), and the guiding sheath (10) includes an operating handle (12) and a reflux connector (11), characterized in that, The pressing assembly comprises a deformation tube (100), and the deformation tube (100) is connected to the return joint (11); The deformable tube (100) comprises an elastic tube (110), the elastic tube (110) being made of an elastic material, and when the deformable tube (100) is subjected to force, the elastic tube (110) bends, so that the flow cross section in the elastic tube (110) changes, thereby changing the flow rate of the elastic tube (110); The elastic tube (110) comprises a bending region (112), wherein: The elastic tube (110) has a width gradually decreasing in its axial direction from the side facing the operating handle (12) to the bending area (112); The elastic tube (110) has a width gradually increasing in its axial direction from the bending area (112) to the side facing away from the operating handle (12); The deformable tube (100) further comprises a rigid tube (120), the rigid tube (120) having a stiffness greater than that of the elastic tube (110), and the rigid tube (120) is connected to the elastic tube (110).

2. The pressing component according to claim 1, characterized in that The pressing assembly further comprises a guide member (200); when the elastic tube (110) is bent, at least a portion of the guide member (200) can abut against the elastic tube (110) to push at least a portion of the elastic tube (110) to be recessed into the interior of the elastic tube (110); And / or, the elastic tube (110) is provided with a recessed portion (111), the recessed portion (111) being recessed towards the central axis side of the elastic tube (110) so as to guide at least a portion of the elastic tube (110) to be recessed towards the inside of the elastic tube (110) during a bending process.

3. The pressing component according to claim 1, characterized in that, The bending area (112) is located on a side of the central axis of the elastic tube (110) that is away from the operating handle (12).

4. The pressing assembly according to claim 1, wherein, In the axial direction of the elastic tube (110), the width of the elastic tube (110) on the side facing away from the operating handle (12) is greater than the width of the elastic tube (110) on the side facing the operating handle (12).

5. The pressing assembly according to claim 2, characterized in that, The guide member (200) is connected to the rigid tube (120), and at least a portion of the guide member (200) is capable of abutting against the elastic tube (110) when the elastic tube (110) is bent, so as to push a portion of the elastic tube (110) to deform toward the inner side of the elastic tube (110).

6. The pressing assembly according to claim 5, wherein, The guide member (200) is provided with an abutment portion (210) at a position where it is in contact with the elastic tube (110); the abutment portion (210) is provided with an arc surface (211); when the elastic tube (110) is bent, the elastic tube (110) fits against the arc surface (211); And / or, the first end of the elastic tube (110) is connected to the return joint (11), and the shape of the connection between the return joint (11) and the elastic tube (110) matches the shape of the end of the elastic tube (110); And / or, the second end of the flexible tube (110) is connected to the rigid tube (120), and the shape of the connection between the rigid tube (120) and the flexible tube (110) matches the shape of the end of the flexible tube (110).

7. The pressing component according to claim 1, characterized in that, A guide member (300) is connected between the operating handle (12) and the deformable tube (100) to guide the deformable tube (100) to move along its central axis direction towards the bending region (112) during the deformation of the deformable tube (100) towards the operating handle (12) side.

8. A pressing component according to claim 7, characterized in that, The guide member (300) is connected to the operating handle (12). The guide member (300) is provided with a guide groove (310) that extends from a position far from the operating handle (12) to a position close to the operating handle (12) side. The deformable tube (100) is in sliding fit with the guide groove (310), and the distance between the guide groove (310) and the bending region (112) gradually decreases from a position far from the operating handle (12) to a position close to the operating handle (12).

9. A guiding sheath, characterized in that, Comprising the pressing assembly according to any one of claims 1-8.

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