Continuous Renal Replacement Therapy Intravenous Jar

Abstract

This utility model discloses a continuous renal replacement therapy (CRRT) tubing venous reservoir. The venous reservoir includes a reservoir body, a lid, and a filter. The reservoir body comprises an inflow section, a transition section, and a degassing section connected sequentially. The inner diameter of the inflow section is larger than that of the degassing section, and the inner diameter of the transition section gradually decreases from the inflow section to the degassing section. The lid connects to the inflow section, forming a functional cavity. The filter is connected to and disposed within the degassing section. This technical solution, by optimizing the structural design of the venous reservoir and combining functions such as flow path, gas discharge, and blood filtration, solves the problems of poor blood flow, residual gas, and incomplete filtration in traditional designs. This design not only improves the efficiency of the dialysis device but also significantly enhances patient safety, providing a more efficient and reliable solution for renal dialysis treatment.

Description

Technical Field

[0001] This utility model relates to the technical field of continuous renal replacement therapy tubing venous reservoirs, and more particularly to a continuous renal replacement therapy tubing venous reservoir. Background Technology

[0002] Kidney dialysis is an important clinical treatment for patients with kidney failure. During dialysis, the patient's blood needs to be filtered and processed through an extracorporeal circulation device to remove metabolic waste and excess water from the body. In the extracorporeal circulation system of hemodialysis, the venous chamber is a common core component, whose main function is to contain blood fluid, remove gas, and block impurities in the blood to ensure that the blood can be safely and stably returned to the body.

[0003] Existing intravenous catheters typically consist of a body and a lid, with an internal cavity containing a filter to trap particulate matter or blood clots in the blood. Some catheters also have a vent in the lid to allow air to escape from the blood. However, existing designs have several significant drawbacks. The internal structure of the catheter is relatively simple, lacking proper guidance for blood flow, which can lead to incomplete removal of residual air from the blood. This increases the risk of air bubbles entering the bloodstream and compromises dialysis safety. Utility Model Content

[0004] One objective of this invention is to provide a continuous renal replacement therapy tubing venous reservoir that solves problems such as poor blood flow, gas residue, and incomplete filtration in traditional designs.

[0005] To achieve the above objectives, the present invention provides a solution as follows: a continuous renal replacement therapy tubing venous reservoir includes a reservoir body, a reservoir lid, and a filter screen. The reservoir body includes an inflow section, a transition section, and a degassing section connected in sequence. The inner diameter of the inflow section is larger than the inner diameter of the degassing section, and the inner diameter of the transition section gradually decreases from the inflow section to the degassing section. The reservoir lid is connected to the inflow section and together forms a functional cavity. The filter screen is connected to the degassing section and disposed in the degassing section.

[0006] Optionally, the connection between the inflow section and the transition section is a sharp-angle structure, and the connection between the transition section and the degassing section is a sharp-angle structure.

[0007] Optionally, the transition section is inclined from the inflow section to the degassing section.

[0008] Optionally, the transition section includes multiple vertical surfaces and multiple horizontal surfaces, which are alternately arranged. The vertical surfaces extend along the axial direction of the functional cavity, and the horizontal surfaces extend along the axial direction perpendicular to the functional cavity. The connection between the vertical and horizontal surfaces is a stepped structure with sharp corners.

[0009] Optionally, the continuous renal replacement therapy tubing venous reservoir includes a cloth sheet attached to the inner surface of the transition section.

[0010] Optionally, the cloth sheet is attached to the inner surface of the degassing section.

[0011] Optionally, the fabric sheet is attached to the inner surface of the inflow section.

[0012] Optionally, the inner diameter of the inflow section gradually decreases in the direction toward the transition section.

[0013] Optionally, the inner diameter of the degassing section gradually decreases in the direction away from the transition section.

[0014] Optionally, a protrusion is formed on the inner wall of the degassing section, and the protrusion forms a groove with the end of the degassing section, with part of the outer peripheral surface of the filter screen protruding outward and fitting into the groove.

[0015] The beneficial effects of this invention are as follows: This technical solution effectively solves several problems existing in traditional kidney dialysis devices by optimizing the structure of the venous chamber for continuous renal replacement therapy, especially the design of the inflow section, transition section, and degassing section. Firstly, the gradually decreasing inner diameter design ensures smooth blood flow and effectively reduces residual gas in the blood. Through this structure, air is expelled, preventing gas from entering the body and ensuring patient safety. Compared with traditional venous chambers, the gradually decreasing inner diameter design helps improve gas expulsion efficiency and prevents gas accumulation, thereby reducing the health risks caused by air bubbles in the blood.

[0016] Secondly, the filter effectively solves the problems of particulate matter and blood clots in the blood, ensuring that impurities in the blood are blocked outside the filter, thereby preventing these substances from entering the extracorporeal circulation device, reducing the impact of blood clots on blood circulation, and improving the quality and safety of blood during dialysis.

[0017] By incorporating a vent on the lid, gas in the functional chamber can be promptly released, preventing gas buildup within the venous chamber. This design further enhances the safety and efficiency of the entire device. In practical use, this design effectively optimizes blood flow paths, improves fluid flow rate and dialysis effectiveness, while reducing operational complexity, simplifying equipment maintenance, and ensuring the reliability and stability of the dialysis device during long-term use.

[0018] In summary, this technical solution, by optimizing the structural design of the venous chamber and combining functions such as flow path, gas discharge, and blood filtration, solves the problems of poor blood flow, residual gas, and incomplete filtration in traditional designs. This design not only improves the efficiency of the dialysis device but also significantly enhances patient safety, providing a more efficient and reliable solution for renal dialysis treatment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the continuous renal replacement therapy tubing venous reservoir provided in this embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the kettle body provided in this embodiment of the utility model;

[0022] Figure 3 This is a cross-sectional schematic diagram of the kettle body provided in one embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional schematic diagram of the kettle body provided in another embodiment of this utility model;

[0024] Figure 5 This is a cross-sectional schematic diagram of the kettle body provided in another embodiment of this utility model.

[0025] Explanation of icon numbers:

[0026] 30 filter screen, 20 lid, 10 body, 101 functional chamber, 102 slot, 11 inlet section

[0027] 12 Transition section, 13 Degassing section, 14 Vertical surface, 15 Horizontal surface, 16 Cloth piece, 17 Protrusion. Detailed Implementation

[0028] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, clearly and comprehensively demonstrating the technical solution. It should be noted that the listed embodiments are only a part of this utility model, and not all possible implementations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Please see Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the structure of the continuous renal replacement therapy tubing venous reservoir provided in this embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of the kettle body 10 provided in this embodiment of the utility model. Figure 3 This is a cross-sectional schematic diagram of the pot body 10 provided in one embodiment of the present invention.

[0030] This technical solution provides a continuous renal replacement therapy tubing venous chamber design for use in kidney dialysis, particularly in the process of filtering blood, to optimize gas removal and blood filtration. The continuous renal replacement therapy tubing venous chamber includes: a chamber body 10, a lid 20, and a filter 30. The chamber body 10 includes an inflow section 11, a transition section 12, and a degassing section 13 connected in sequence. The inner diameter of the inflow section 11 is larger than the inner diameter of the degassing section 13, and the inner diameter of the transition section 12 gradually decreases from the inflow section 11 to the degassing section 13. The lid 20 is connected to the inflow section 11 to form a functional cavity 101. The filter 30 is connected to and disposed within the degassing section 13.

[0031] The continuous renal replacement therapy tubing venous chamber mainly consists of three parts: the chamber body 10, the lid 20, and the filter 30. The chamber body 10 internally includes an inflow section 11, a transition section 12, and a degassing section 13 connected in sequence. The inner diameter of the inflow section 11 is larger than that of the degassing section 13, while the inner diameter of the transition section 12 gradually decreases from the inflow section 11 to the degassing section 13. This gradually decreasing design helps reduce residual gas in the blood, prevents air from entering the body, and improves safety during dialysis.

[0032] The lid 20 is connected to the inflow section 11, forming a functional chamber 101. The function of the functional chamber 101 is to contain and process blood, gas, and other substances flowing through the venous chamber, ensuring that the blood is effectively processed before returning to the body. A filter 30 is located in and connected to the degassing section 13. Its main function is to filter out any particulate matter and blood clots that may be present in the blood, as well as to capture air entering the extracorporeal circulation device from upstream. The filter 30 effectively prevents blood clots from entering the bloodstream and reduces residual gas in the blood, ensuring patient safety. Gas in the functional chamber 101 is discharged through the vent on the lid 20, preventing gas from affecting blood circulation.

[0033] This design ensures smooth blood flow through the venous reservoir, undergoing effective filtration and degassing. Blood first enters the reservoir through inlet section 11, whose larger inner diameter provides sufficient flow to prevent adverse effects from excessively slow blood flow. Transition section 12, with its gradually decreasing inner diameter, provides appropriate resistance to blood flow, aiding in the removal of residual gases. Finally, the blood flows into degassing section 13 and is filtered through filter screen 30 before returning to the body, completing an efficient and safe filtration process.

[0034] This technical solution effectively addresses several problems existing in traditional kidney dialysis devices by optimizing the structure of the venous reservoir for continuous renal replacement therapy, particularly the design of the inflow section 11, transition section 12, and degassing section 13. Firstly, the gradually decreasing inner diameter design ensures smooth blood flow and effectively reduces residual gas in the blood. This structure eliminates air, preventing it from entering the body and ensuring patient safety. Compared to traditional venous reservoirs, the gradually decreasing inner diameter design helps improve gas removal efficiency and prevents gas accumulation, thereby reducing the health risks caused by air bubbles in the blood.

[0035] Secondly, the filter 30 effectively solves the problems of particulate matter and thrombi in the blood, ensuring that impurities in the blood are blocked outside the filter 30, thereby preventing these substances from entering the extracorporeal circulation device, reducing the impact of thrombi on blood circulation, and improving the quality and safety of blood during dialysis.

[0036] By providing an vent on the lid 20, gas in the functional chamber 101 can be released promptly, preventing gas accumulation in the venous chamber. This design further enhances the safety and efficiency of the entire device. In practical use, this design effectively optimizes blood flow path, improves fluid flow rate and dialysis effect, while reducing operational complexity, simplifying equipment maintenance, and ensuring the reliability and stability of the dialysis device during long-term use.

[0037] In summary, this technical solution, by optimizing the structural design of the venous chamber and combining functions such as flow path, gas discharge, and blood filtration, solves the problems of poor blood flow, residual gas, and incomplete filtration in traditional designs. This design not only improves the efficiency of the dialysis device but also significantly enhances patient safety, providing a more efficient and reliable solution for renal dialysis treatment.

[0038] In this embodiment, the connection between the inflow section 11 and the transition section 12 is a sharp-angled structure, as is the connection between the transition section 12 and the degassing section 13. The design of the venous chamber utilizes sharp-angled structures at the connections between the inflow section 11 and the transition section 12, and between the transition section 12 and the degassing section 13. The design of these sharp-angled structures aims to change the direction of blood flow through sharp angles, thereby more effectively puncturing any air bubbles that may be present in the blood. Specifically, the connections between the inflow section 11 and the transition section 12, and between the transition section 12 and the degassing section 13, all form a distinct turning point through sharp-angled structures, rather than the gradual transition of traditional rounded corner structures. This allows air bubbles in the blood to rupture when they encounter the sharp-angled structures during flow, preventing them from continuing to exist in the blood.

[0039] The sharp-angled structure has a positive impact on fluid flow. As air bubbles flow through the sharp angle, the change in angle increases the impact between the bubbles and the blood fluid, causing the bubbles to burst and thus separating them from the blood. This structure effectively improves the gas removal efficiency of the venous chamber during dialysis.

[0040] In this embodiment, the transition section 12 is inclined from the inflow section 11 to the degassing section 13. This technical solution successfully solves the problem of air bubble accumulation in traditional venous chamber designs by setting sharp-angle structures at the connections between the inflow section 11 and the transition section 12, and between the transition section 12 and the degassing section 13. Firstly, the sharp-angle structure allows air bubbles in the blood to be impacted and disturbed when passing through the connection, forcing them to burst and preventing them from entering the body. If air bubbles are not removed in time, they may cause serious medical problems such as air embolism; therefore, effective air bubble removal is crucial for ensuring patient safety.

[0041] Secondly, the pointed structure design improves the gas removal efficiency of the venous chamber. By stimulating the bursting of air bubbles, the pointed structure helps accelerate the removal of gas, thereby reducing the amount of air bubbles remaining in the blood. This design effectively enhances the stability of fluid flow, ensuring smooth blood flow during dialysis and avoiding poor or unstable blood flow caused by air bubbles.

[0042] Finally, the sharp-angled structure design is simple and efficient, avoiding the complex bubble removal mechanisms found in traditional dialysis devices. This design not only improves the safety and dialysis effectiveness of the equipment but also reduces maintenance and operation difficulty, simplifies the structure of the venous chamber, and ensures its efficient gas evacuation function.

[0043] In this embodiment, the transition section 12 of the venous chamber is designed to be inclined from the inflow section 11 to the degassing section 13, forming a smooth inclined structure. This inclined design of the transition section 12 helps to optimize the flow path of blood or fluid. After the fluid flows in from the inflow section 11, the fluid flow rate increases steadily as it passes through the smooth inclined transition section 12, and the fluid can be quickly and smoothly guided into the degassing section 13.

[0044] The inclined design of transition section 12 eliminates the resistance caused by sharp turns in the liquid flow, thereby reducing turbulence and bubble generation. The inclined surface effectively avoids abrupt changes in liquid flow, helping the liquid to stabilize sufficiently and reducing gas residue before entering degassing section 13. This ensures that blood or liquid can more effectively remove bubbles as it passes through the venous chamber, improving the safety and stability of the dialysis process.

[0045] Please see Figure 1 and Figure 4 As shown, Figure 4This is a cross-sectional schematic diagram of the pot body 10 provided in another embodiment of the present invention.

[0046] In this embodiment, the transition section 12 includes multiple vertical surfaces 14 and multiple horizontal surfaces 15, which are alternately arranged. The vertical surfaces 14 extend along the axial direction of the functional cavity 101, while the horizontal surfaces 15 extend along the axial direction perpendicular to the functional cavity 101. The connection between the vertical surfaces 14 and the horizontal surfaces 15 is a stepped structure with sharp angles. The transition section 12 of the venous chamber adopts a structural design with multiple vertical surfaces 14 and multiple horizontal surfaces 15 alternating. The vertical surfaces 14 extend along the axial direction of the functional cavity 101, while the horizontal surfaces 15 extend along the axial direction perpendicular to the functional cavity 101. The alternation of the vertical surfaces 14 and the horizontal surfaces 15 forms a stepped structure, wherein the connection between the vertical surfaces 14 and the horizontal surfaces 15 is a stepped structure with sharp angles. The purpose of this design is to continuously stimulate and impact any air bubbles that may exist in the blood during the flow process through the stepped structure with sharp angles, thereby achieving the effect of continuously puncturing the air bubbles.

[0047] The alternating arrangement of vertical surfaces 14 and horizontal surfaces 15 provides multiple switching points for flow paths, causing the liquid flow direction and velocity to change continuously as it passes through transition section 12. This design, through the combination of different flow paths and velocities, encourages bubbles to collide with and break up against the sharp-cornered structure during flow, reducing the likelihood of bubble residue.

[0048] Please see Figure 1 and Figure 5 As shown, Figure 5 This is a cross-sectional schematic diagram of the pot body 10 provided in another embodiment of the present invention.

[0049] In this embodiment, the continuous renal replacement therapy tubing venous reservoir includes a fabric sheet 16, which is attached to the inner surface of the transition section 12. The continuous renal replacement therapy tubing venous reservoir is designed with the fabric sheet 16 attached to the inner surface of the transition section 12. The fabric sheet 16 is made of a material with a capillary structure. This capillary structure of the fabric sheet 16 can effectively accelerate the flow of liquid in the transition section 12 through the principle of capillary action. Capillary action refers to the ability of liquid to overcome surface tension through tiny pores and flow along the capillary structure, thereby increasing the flow rate and efficiency of the liquid.

[0050] The capillary structure of the fabric sheet 16, through its microscopic network of pores, provides an additional flow path as the liquid passes through the transition section 12, further promoting rapid liquid flow and bubble removal. The design of the fabric sheet 16 not only enhances liquid fluidity but also effectively reduces the contact time between the liquid and bubbles during flow, thereby preventing bubble residue and accumulation and ensuring smooth liquid flow.

[0051] In this embodiment of the continuous renal replacement therapy tubing venous chamber design, a fabric patch 16 is attached to the inner surface of the degassing section 13. The function of the fabric patch 16 is to accelerate the removal of gases from the blood through its special surface material and structure. Within the venous chamber, the degassing section 13 removes air bubbles or residual gases from the blood to ensure stable and gas-free blood flow during dialysis. The fabric patch 16 is typically made of a material with adsorption or capillary structures, which help improve the efficiency of air bubble removal.

[0052] The fabric sheet 16 is attached to the inner surface of the degassing section 13, so that when blood comes into contact with the surface of the fabric sheet 16, air bubbles are dispersed and guided to the surface of the fabric sheet 16. Due to the material properties of the fabric sheet 16, these air bubbles are quickly captured and eliminated. This design enables the degassing section 13 to effectively remove air bubbles from the blood, ensuring that no air bubbles remain during blood flow and reducing the potential health risks caused by air bubbles.

[0053] In this embodiment, the continuous renal replacement therapy tubing venous reservoir design includes a fabric patch 16 attached to the inner surface of the inflow section 11. The inflow section 11 is a crucial part of the venous reservoir, primarily responsible for receiving blood and guiding it into the tubing system. The fabric patch 16 is positioned on the inner surface of the inflow section 11 to optimize blood flow using its unique material and structure. The fabric patch 16 is typically made of materials with capillary structures, absorbent properties, or microporous structures, increasing the contact area between the liquid and the surface of the fabric patch 16 to improve blood flow characteristics.

[0054] The adhesion of the fabric patch 16 reduces resistance to fluid flow and optimizes the fluid flow path through its surface properties, particularly by accelerating blood flow through its capillary structure. In the inflow section 11, the fabric patch 16 helps to evenly distribute the incoming blood and guide it more smoothly into the downstream portion of the venous reservoir. Furthermore, the fabric patch 16 also enables slight blood filtration within the inflow section 11, ensuring that the blood is free of large particles or insoluble matter, maintaining blood cleanliness and smooth flow.

[0055] Please continue reading. Figures 1 to 3 In this embodiment, the inner diameter of the inflow section 11 gradually decreases towards the transition section 12. The inflow section 11 is the initial part of the venous chamber, responsible for receiving blood and guiding it into the next stage of processing. By designing the inflow section 11 with a gradually decreasing inner diameter, the blood flow state can be optimized, enhancing the gas removal effect. When blood flows through the inflow section 11, the gradually decreasing inner diameter generates a higher flow velocity, increasing the shear force of the liquid flow and helping to effectively disperse and break up air bubbles and gas molecules carried in the blood.

[0056] The gradually decreasing inner diameter design of the inflow section 11 also generates a compression effect during blood flow, thereby better separating gas from the blood. During the flow from the inflow section 11 to the transition section 12, the bubbles are squeezed to the outer edge of the system and gradually crushed or discharged, effectively improving the gas removal efficiency.

[0057] In this embodiment, the degassing section 13 of the venous chamber is designed such that its inner diameter gradually decreases in the direction away from the transition section 12. The degassing section 13 is a crucial part of the venous chamber, its main function being to remove any residual gas from the blood or liquid, especially during dialysis, where air bubbles can affect blood flow and dialysis effectiveness. By designing the degassing section 13 to have a gradually decreasing inner diameter, the flow rate and pressure change during liquid flow, thereby improving the efficiency of bubble breakup.

[0058] The gradually decreasing inner diameter design causes a compression effect as blood or liquid passes through the degassing section 13, causing air bubbles to burst and be expelled from the system. This design, through an efficient gas removal mechanism, ensures the removal of gas from the liquid, prevents air bubbles from entering the body, and reduces potential risks such as air embolism.

[0059] In this embodiment, a protrusion 17 is designed on the inner wall of the degassing section 13 of the venous chamber. The protrusion 17 and the end of the degassing section 13 form a groove 102, and a portion of the outer peripheral surface of the filter screen 30 protrudes outward and is fitted into the groove 102. The purpose of this design is to fix the filter screen 30 and prevent it from shifting during use. The fact that a portion of the outer peripheral surface of the filter screen 30 protrudes outward and is fitted into the groove 102 ensures that the filter screen 30 is firmly fixed within the degassing section 13, ensuring that it always remains in the correct position and will not shift due to blood flow or other factors.

[0060] This structural design effectively prevents the filter 30 from shifting due to vibration, pressure changes, or unstable liquid flow during blood flow, thus ensuring that the filter 30 can continuously perform its filtering function and guarantee the purification effect of blood and the removal effect of gas during dialysis.

[0061] This technical solution effectively solves the problem of potential displacement of the filter screen 30 in traditional designs by providing a protrusion 17 on the inner wall of the degassing section 13 and forming a groove 102 at its end. Firstly, this groove 102 design provides a stable structure, ensuring that the outer circumferential surface of the filter screen 30 is firmly engaged in the groove 102, preventing the filter screen 30 from shifting or falling off due to fluid pressure or vibration. In this way, the filter screen 30 remains in the correct position throughout the dialysis process, ensuring it can exert maximum efficiency and continuously and effectively filter particulate matter, thrombi, and air bubbles from the blood.

[0062] Secondly, the stable fixation of the filter 30 effectively improves the safety of the venous chamber. During dialysis, if the filter 30 shifts, impurities in the blood may not be completely filtered out, or air bubbles may not be completely removed, thus affecting the dialysis effect and even endangering patient safety. This design, by fixing the filter 30 in place, optimizes the blood flow path and filtration process, ensuring the safety and effectiveness of each dialysis session.

[0063] Finally, the simplicity of the slot 102 design improves the manufacturing process and assembly efficiency of the venous infusion vessel. The filter screen 30 is secured by simply snapping it into the slot 102, eliminating the need for additional complex installation steps or fasteners, thus simplifying the production and maintenance process. This not only increases production efficiency but also reduces the maintenance difficulty for operators, thereby enhancing the stability and durability of the venous infusion vessel.

[0064] In summary, the design of the slot 102 and the protrusion 17 effectively prevents the filter screen 30 from shifting in the degassing section 13, ensuring the stability and reliability of the filter screen 30 during the dialysis process. This design not only improves the safety and filtration efficiency of the dialysis equipment but also optimizes the structure of the venous chamber and simplifies the assembly process, demonstrating significant technical advantages and broad application prospects.

[0065] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0066] Furthermore, when an element is referred to as 'fixed to' or 'set on' another element, it may be directly attached to that element, or there may be other intervening elements between them. When an element is referred to as 'connected to' another element, it can be directly connected to the other element or indirectly connected to the other element through an intervening element.

[0067] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, the designation of features such as "first" and "second" can either explicitly express or imply the presence of at least one such feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0068] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A continuous renal replacement therapy tubing venous reservoir, characterized in that, The continuous renal replacement therapy tubing venous reservoir includes: The kettle body includes an inflow section, a transition section, and a degassing section connected in sequence. The inner diameter of the inflow section is larger than the inner diameter of the degassing section, and the inner diameter of the transition section gradually decreases from the inflow section to the degassing section. The lid, together with the inlet section, forms a functional cavity; and A filter screen is connected to and installed in the degassing section.

2. The continuous renal replacement therapy tubing venous reservoir according to claim 1, characterized in that, The connection between the inflow section and the transition section is a sharp-angled structure, and the connection between the transition section and the degassing section is a sharp-angled structure.

3. The continuous renal replacement therapy tubing venous reservoir according to claim 1, characterized in that, The transition section is inclined from the inflow section to the degassing section.

4. The continuous renal replacement therapy tubing venous reservoir according to claim 1, characterized in that, The transition section includes multiple vertical surfaces and multiple horizontal surfaces, which are alternately arranged. The vertical surfaces extend along the axial direction of the functional cavity, and the horizontal surfaces extend along the axial direction perpendicular to the functional cavity. The connection between the vertical surfaces and the horizontal surfaces is a stepped structure with sharp corners.

5. The continuous renal replacement therapy tubing venous reservoir according to any one of claims 1 to 4, characterized in that, The continuous renal replacement therapy tubing venous reservoir includes a cloth sheet attached to the inner surface of the transition section.

6. The continuous renal replacement therapy tubing venous reservoir according to claim 5, characterized in that, The cloth sheet is attached to the inner surface of the degassing section.

7. The continuous renal replacement therapy tubing venous reservoir according to claim 5, characterized in that, The fabric sheet is attached to the inner surface of the inflow section.

8. The continuous renal replacement therapy tubing venous reservoir according to any one of claims 1 to 4, characterized in that, The inner diameter of the inflow section gradually decreases in the direction toward the transition section.

9. The continuous renal replacement therapy tubing venous reservoir according to any one of claims 1 to 4, characterized in that, The inner diameter of the degassing section gradually decreases in the direction away from the transition section.

10. The continuous renal replacement therapy tubing venous reservoir according to any one of claims 1 to 4, characterized in that, A protrusion is formed on the inner wall of the degassing section, and the protrusion forms a groove with the end of the degassing section. A portion of the outer circumference of the filter screen protrudes outward and is fitted into the groove.

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