Hemodialysis pipeline vein pot

Abstract

The invention discloses a hemodialysis pipeline vein pot which comprises a vein pot body, a threaded connector, a replaceable filter cover, an upper end filter screen, a valve, a monitoring connecting pipe, a threaded sleeve and a lower end filter screen, and the vein pot body is provided with an inlet end used for connecting venous blood and an outlet end used for outputting blood; the threaded connector is arranged on the inner side wall, close to the inlet end, of the vein pot body. The replaceable filter cover is in threaded connection with the threaded connector, an upper end filter screen is integrated in the replaceable filter cover, and the upper end filter screen is located in the vein pot body and located on a blood inflow path of the inlet end and used for filtering blood for the first time and preventing blood coagulation. Therefore, due to the design of the replaceable filter cover and the threaded connector, the filter screen at the upper end is convenient to replace, the cost of consumables is reduced, the double-filter structure aims at a hypercoagulable patient, blood coagulation is perceived in time for the first time, blood coagulation substances are reduced for the second time, the dialysis safety is improved, the connecting pipe and the valve are monitored, a scheme is provided for blood coagulation emergency, and it is guaranteed that the dialysis process is smooth.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a venous chamber of a hemodialysis tubing. Background Art

[0002] In hemodialysis treatment, the venous chamber is a key component connecting the venous blood circuit and the dialyzer, and its core functions include blood collection, filtration, and coagulation monitoring. The currently clinically used venous chambers have the following technical defects:

[0003] 1. The filtration structure is non-replaceable: The filter meshes of traditional venous chambers are mostly of fixed design. When thrombus blockage occurs, the entire tubing needs to be replaced, increasing the medical cost and making the operation cumbersome.

[0004] 2. Coagulation treatment is not convenient: For patients in a hypercoagulable state who do not use heparin, there is a lack of an effective coagulation emergency treatment channel. Once the filter mesh coagulates, it will be difficult to draw blood, affecting the dialysis process.

[0005] 3. Insufficient filtration efficiency: A single filtration structure is difficult to meet the multiple filtration requirements of hypercoagulable blood, and the risk of secondary coagulation is relatively high.

[0006] 4. Low functional integration: Existing venous chambers usually only have basic filtration functions and lack an integrated design with monitoring devices, and cannot provide real-time feedback on the coagulation status.

[0007] In view of the above problems, through the innovative design of a replaceable filter cover, a dual filtration structure, and a coagulation emergency channel, the present invention realizes modular maintenance, efficient coagulation treatment, and functional integration of the venous chamber, significantly improving the safety and convenience of hemodialysis. Summary of the Invention

[0008] This application aims to solve at least one of the technical problems in the related technologies to some extent.

[0009] To this end, the first object of this application is to provide a venous chamber of a hemodialysis tubing. The design of a replaceable filter cover and a threaded interface greatly facilitates the rapid replacement of the upper filter mesh. In actual use, once problems such as blockage occur in the upper filter mesh, medical staff only need to replace the filter cover without replacing the entire venous chamber tubing, reducing the usage amount of medical consumables, effectively reducing the usage cost, and saving unnecessary expenses for medical institutions and patients.

[0010] The second object of the present application is to provide a venous chamber of a hemodialysis tubing. Aiming at the problem of easy blood coagulation during hemodialysis for patients in a hypercoagulable state, this venous chamber is designed with a unique dual - filtration structure. The upper filter screen first performs primary filtration on the blood. With its fine filtration performance, it can detect the blood coagulation problem in time. Then, the lower filter screen performs secondary filtration to further reduce the coagulation substances in the blood, significantly reducing the coagulation risk and comprehensively improving the safety of the dialysis process.

[0011] The third object of the present application is to provide a venous chamber of a hemodialysis tubing. The reasonable setting of the monitoring connecting tube and the valve provides a reliable emergency solution for the possible blood coagulation situation during dialysis. When blood extraction becomes difficult due to blood coagulation on the upper filter screen, medical staff can quickly open the valve to ensure that the hemodialysis process is unobstructed and continues smoothly, effectively avoiding dialysis interruption caused by blood coagulation problems and ensuring the continuity and effectiveness of the treatment.

[0012] To achieve the above object, the first - aspect embodiment of the present application proposes a venous chamber of a hemodialysis tubing, including a venous chamber body, a threaded interface, a replaceable filter cover, an upper filter screen, a valve, a monitoring connecting tube, a threaded sleeve, and a lower filter screen. Among them, an inlet end for accessing venous blood and an outlet end for blood output are provided on the venous chamber body; the threaded interface is arranged at the inner - wall position of the venous chamber body near the inlet end; the replaceable filter cover is threadedly connected to the threaded interface, and the upper filter screen is integrated in the replaceable filter cover. The upper filter screen is located inside the venous chamber body and on the path of the blood flowing in from the inlet end, and is used for primary filtration of the blood to prevent blood coagulation; one end of the monitoring connecting tube is communicated with the venous chamber body, and the communication position is above the upper filter screen; the valve is communicated with the venous chamber body. When blood extraction becomes difficult due to blood coagulation on the upper filter screen, blood is extracted by opening the valve; the threaded sleeve is arranged at the lower position inside the venous chamber body; the lower filter screen is threadedly connected to the threaded sleeve and is located on the path of the blood flowing towards the outlet end inside the venous chamber body, and is used for secondary filtration of the blood.

[0013] The venous chamber of a hemodialysis tubing according to the embodiment of the present application has a design of a replaceable filter cover and a threaded interface, which makes the replacement of the upper filter screen convenient and reduces the consumable cost. The dual - filtration structure is aimed at hypercoagulable patients, detecting blood coagulation in time for the first time and reducing coagulation substances for the second time, improving the safety of dialysis. The setting of the monitoring connecting tube and the valve provides a solution for blood - coagulation emergencies and ensures the smooth progress of the dialysis process.

[0014] In addition, the venous chamber of a hemodialysis tubing proposed above according to the present application may further have the following additional technical features:

[0015] In an embodiment of the present application, it further includes a venous blood connecting tube and a venous administration tube. The venous blood connecting tube is connected to the inlet end of the venous chamber body, and the venous administration tube communicates with the venous chamber body, and a blood reflux prevention structure is provided at the communication part.

[0016] In an embodiment of the present application, the upper filter screen is used for initially filtering the blood of patients in a hypercoagulable state who have not used heparin, to timely detect coagulation problems, and the lower filter screen performs secondary filtering on the blood filtered by the upper filter screen to reduce coagulation.

[0017] In an embodiment of the present application, the mesh diameter of the upper filter screen is 15 - 20 microns, the mesh diameter of the lower filter screen is 30 - 50 microns, and its filtration accuracy is lower than that of the upper filter screen. Both the upper filter screen and the lower filter screen are made of anticoagulant medical fiber material.

[0018] In an embodiment of the present application, the outer surface of the replaceable filter cap is provided with anti-slip lines, and the thread depth of the threaded interface is adapted to the thread length of the replaceable filter cap, and a sealed connection is formed through thread matching.

[0019] The blood reflux prevention structure is a one-way valve assembly, including but not limited to a one-way valve made of medical-grade silicone material (such as model: CPC-001, YS-DF-002). The valve structure of the one-way valve only allows the drug to flow from the venous administration tube to the venous chamber body. When the blood pressure in the venous chamber body is abnormal, the valve automatically closes to prevent blood from flowing back to the venous administration tube.

[0020] Detailed Explanation of the Coagulation Factor Interception Path

[0021] 1. Initial Interception (Upper Filter Screen)

[0022] Interception Object: Larger coagulation factor aggregates formed early in the blood (such as fibrinogen polymers, initially formed microthrombi, with a diameter usually in the range of 20 - 50 μm) and some coagulation factors (such as thrombin, factor Ⅹ, etc.).

[0023] Interception Mechanism:

[0024] The mesh diameter of the upper filter screen 4 is 15 - 20 μm, which is smaller than the average diameter of early microthrombi (20 - 50 μm), and larger coagulation substances can be directly intercepted through physical sieving.

[0025] The filter screen material is anticoagulant medical fiber (such as heparin-coated polyester fiber), and the anticoagulant coating on its surface can inhibit the adhesion and activation of coagulation factors (such as factor Ⅻ, platelets), reducing the initiation of the coagulation cascade reaction from the source and lowering the probability of thrombus formation.

[0026] Path location: It is located inside the inlet end of the venous chamber body. After the blood flows in from the venous blood connecting tube, it first passes through the upper filter screen to achieve the first precise interception.

[0027] 2. Secondary interception (lower filter screen)

[0028] Interception objects: Smaller coagulation factors remaining after filtration by the upper filter screen (such as free thrombin, unaggregated fibrin monomers) and fine thrombus fragments (with a diameter of 30 - 50 μm).

[0029] Interception mechanism:

[0030] The mesh diameter of the lower filter screen is 30 - 50 μm. Although it is larger than the upper filter screen (with lower filtration accuracy), it can specifically intercept medium-sized coagulation substances remaining after the initial filtration and prevent them from entering the subsequent dialysis pipeline.

[0031] It also uses anticoagulant medical fiber material to further inhibit the adsorption and aggregation of coagulation factors on the filter screen, and forms a dual effect of "physical interception + chemical anticoagulation" in combination with the mesh structure, reducing the concentration of free coagulation factors in the blood.

[0032] Path location: It is located at the lower end inside the venous chamber body. After the blood is initially filtered by the upper filter screen, it flows downward to the lower filter screen to complete the secondary filtration.

[0033] 3. Synergistic effect of double filtration

[0034] Hierarchical filtration: The upper filter screen intercepts larger coagulation substances through fine meshes (15 - 20 μm), and the lower filter screen processes the remaining medium-sized coagulation substances with relatively loose meshes (30 - 50 μm), forming a gradient interception of "coarse first and then fine" to avoid blockage caused by excessive load on a single filter screen.

[0035] Anticoagulant material assistance: Both layers of filter screens use anticoagulant fibers. The surface coating can inhibit the activation of coagulation factors, reduce the formation and accumulation of thrombus on the filter screen, extend the effective working time of the filter screen, and at the same time reduce the activity of coagulation factors in the blood, reducing the coagulation risk from the two paths of "intercepting existing coagulation substances" and "inhibiting the formation of new coagulation".

[0036] The advantages of this application compared with the existing technology are as follows:

[0037] (1) The design of using a replaceable filter cover and a threaded interface greatly facilitates the rapid replacement of the upper filter screen. In actual use, once problems such as blockage occur in the upper filter screen, medical staff only need to replace the filter cover without replacing the entire venous chamber pipeline, reducing the usage amount of medical consumables, effectively reducing the usage cost, and saving unnecessary expenses for medical institutions and patients.

[0038] (2) To address the problem of easy blood clotting during hemodialysis for patients in a hypercoagulable state, this venous chamber is designed with a unique dual - filtration structure. The upper filter screen first conducts primary filtration on the blood. With its fine filtration performance, it can detect blood clotting problems in a timely manner. Then, the lower filter screen conducts secondary filtration to further reduce the blood - clotting substances in the blood, significantly reducing the risk of blood clotting and comprehensively enhancing the safety of the dialysis process.

[0039] (3) The reasonable setting of the monitoring connecting tube and the valve provides a reliable emergency solution for possible blood clotting situations during dialysis. When blood clotting occurs in the upper filter screen, making it difficult to draw blood, medical staff can quickly open the valve to ensure that the hemodialysis process is unobstructed and continues smoothly, effectively avoiding dialysis interruption caused by blood clotting problems and ensuring the continuity and effectiveness of the treatment.

[0040] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above - mentioned and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, where:

[0042] Figure 1 is a perspective view of a venous chamber of a hemodialysis pipeline according to an embodiment of the present application;

[0043] Figure 2 is a wireframe view of a venous chamber of a hemodialysis pipeline according to an embodiment of the present application;

[0044] Figure 3 is a schematic diagram of the internal structure of a venous chamber of a hemodialysis pipeline according to an embodiment of the present application.

[0045] As shown in the figure: 1. Venous chamber body; 2. Threaded interface; 3. Replaceable filter cover; 4. Upper filter screen; 5. Valve; 6. Monitoring connecting tube; 7. Venous blood connecting tube; 8. Venous administration tube; 9. Threaded sleeve; 10. Lower filter screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0047] The following describes a venous chamber of a hemodialysis line according to an embodiment of the present application in conjunction with the accompanying drawings.

[0048] As Figures 1 - 3 shown, a venous chamber of a hemodialysis line according to an embodiment of the present application may include a venous chamber body 1, a threaded interface 2, a replaceable filter cover 3, an upper filter net 4, a valve 5, a monitoring connection tube 6, a threaded sleeve 9, and a lower filter net 10.

[0049] It can be understood that in practical applications, the working process of the venous chamber is as follows:

[0050] 1. Blood inflow: Venous blood flows into through the inlet end of the venous chamber body 1. At this time, a replaceable filter cover 3 is screwed onto the threaded interface 2 at the inner wall position near the inlet end. The upper filter net 4 integrated in the replaceable filter cover 3 is in the necessary path of the blood flowing in at the inlet end, and first filters the incoming venous blood, using its filtering function to prevent blood coagulation.

[0051] 2. Coagulation emergency treatment: When blood extraction becomes difficult due to blood coagulation on the upper filter net 4, since one end of the monitoring connection tube 6 is connected to the venous chamber body 1, and the connection position is above the upper filter net 4, and at the same time the valve 5 is connected to the venous chamber body 1 through the monitoring connection tube 6, at this time, medical staff can open the valve 5 and extract blood through the monitoring connection tube 6 to maintain hemodialysis.

[0052] 3. Secondary blood filtration and outflow: The blood that has undergone primary filtration continues to flow in the venous chamber body 1 and flows towards the threaded sleeve 9 located at the lower end inside the venous chamber body 1. The lower filter net 10 is threadedly connected to the threaded sleeve 9, and the blood is secondarily filtered here to further reduce impurities and possible coagulation substances in the blood. The blood that has completed secondary filtration finally flows out from the outlet end of the venous chamber body 1 and enters the subsequent hemodialysis process.

[0053] It should be explained that when blood coagulation occurs on the upper filter net and makes blood extraction difficult, the obstruction of the entire hemodialysis process and the role of the valve:

[0054] 1. Formation of physical blockage

[0055] In the blood of patients in a hypercoagulable state, coagulation factors (such as fibrinogen, thrombin) are prone to aggregate to form microthrombi or blood clots. After these substances are intercepted by the upper filter net (mesh diameter 15 - 20 μm), they will gradually accumulate on the surface of the filter net. Over time, the accumulated thrombi will cover the mesh holes, resulting in a reduction in the effective filtration area and even complete blockage of the mesh holes.

[0056] 2. Sharp increase in blood flow resistance

[0057] Under normal circumstances, after blood flows into the venous chamber body through the venous blood connection tube, it needs to enter the middle space of the chamber through the upper filter net. When the filter net is blocked, the resistance of blood passing through the filter net increases significantly, resulting in blood stasis and increased pressure on the upstream (inlet end side) of the upper filter net, while the blood flow rate in the downstream (middle part of the chamber) decreases sharply.

[0058] 3. Direct manifestations of difficult extraction

[0059] When the dialysis machine extracts blood from the venous chamber through the outlet end, it relies on the pressure difference between the upstream and downstream. If the upper filter net is blocked, the downstream pressure decreases and the upstream pressure increases, resulting in an imbalance of the pressure difference. At this time, it is difficult for the dialysis machine to effectively extract blood, manifested as a decrease in the suction rate, slow blood flow in the pipeline, and even an alarm for suction interruption.

[0060] The blockage caused by blood coagulation on the upper filter net essentially blocks the conventional path of blood from the inlet end to the middle part of the chamber. Without the valve and the monitoring connection tube, the dialysis machine cannot bypass the blockage point and can only be forced to interrupt. The function of the valve is to use the unobstructed blood filling state upstream when the blockage occurs to establish an independent suction channel bypassing the filter net, ensuring that the blood directly enters the dialysis machine bypassing the blocked area, thereby maintaining the continuity of treatment.

[0061] In an embodiment of the present application, as Figures 1 - 3 shown, it further includes a venous blood connection tube 7 and a venous drug administration tube 8. The venous blood connection tube 7 is connected to the inlet end of the venous chamber body 1, and the venous drug administration tube 8 is communicated with the venous chamber body 1, and an anti-blood reflux structure is provided at the communication position.

[0062] It can be understood that one end of the venous blood connection tube 7 is connected to an external venous blood vessel, and the other end is tightly connected to the inlet end of the venous chamber body 1, introducing venous blood into the venous chamber body 1. A replaceable filter cover 3 is screwed on the threaded interface 2 near the inner wall of the inlet end. The upper filter net 4 integrated in the replaceable filter cover 3 is in the necessary path of the blood flowing in from the inlet end, and first filters the incoming venous blood initially, using its filtering function to prevent blood coagulation.

[0063] The venous drug administration tube 8 is communicated with the venous chamber body 1. When it is necessary to add drugs to assist treatment to the blood, the drugs are injected into the blood in the venous chamber body 1 through the venous drug administration tube 8. It should be noted that an anti-blood reflux structure is provided at the communication position between the venous drug administration tube 8 and the venous chamber body 1. This structure can effectively prevent blood from flowing back from the venous chamber body 1 to the venous drug administration tube 8, avoiding blood contamination of the drugs or causing other adverse effects, and ensuring the safety and stability of the drug infusion process.

[0064] It should be noted that the core of the anti-blood reflux structure described in this embodiment is a one-way valve assembly. The valve flap of the one-way valve is ingeniously designed to only allow the drug to flow from the intravenous administration tube into the blood in the venous chamber. When the blood pressure is abnormally reversed, the valve flap can quickly and tightly close to effectively prevent blood backflow and prevent blood from contaminating the drug. The one-way valve is made of biocompatible materials such as medical-grade silicone, which not only ensures the flexible opening and closing of the valve flap but also meets the hygiene standards of medical devices, providing a reliable guarantee for the intravenous administration process and improving the safety and effectiveness of hemodialysis treatment.

[0065] In an embodiment of the present application, as Figures 1 - 3 shown, the upper filter net 4 is used to initially filter the blood of patients in a hypercoagulable state who have not used heparin, promptly detect coagulation problems, and the lower filter net 10 performs secondary filtration on the blood filtered by the upper filter net 4 to reduce coagulation.

[0066] It can be understood that the initial filtration by the upper filter net 4: After the venous blood flows into the venous chamber body 1 through the venous blood connection tube 7, it first comes into contact with the upper filter net 4 integrated in the replaceable filter cap 3. Due to the high coagulation risk of the blood of patients in a hypercoagulable state, the upper filter net 4 adopts a special fine filter net material and structure design. The pore size and distribution of its mesh are carefully considered, and it can effectively intercept the tiny thrombi and coagulation factor aggregates formed in the early stage in the blood. When the blood flows through the upper filter net 4, medical staff can promptly detect coagulation problems by observing whether there is thrombus attachment on the filter net. For example, if obvious blood clots are found to have gathered on the filter net, this is an early signal of coagulation, reminding medical staff to take corresponding measures, such as adjusting dialysis parameters or adding anticoagulant drugs.

[0067] The secondary filtration by the lower filter net 10: Although the blood that has been initially filtered by the upper filter net 4 has removed some obvious coagulation hazards, it may still contain some smaller coagulation substances and coagulation factors that have not been completely dispersed. At this time, the blood continues to flow in the venous chamber body 1 and reaches the lower filter net 10 located at the lower end inside the venous chamber body 1 and threadedly connected to the threaded sleeve 9. Although the filtration accuracy of the lower filter net 10 is lower than that of the upper filter net 4, its filter net structure can further screen the blood, capture those fine coagulation substances that have escaped the initial filtration, further reduce the coagulation components in the blood, lower the coagulation risk, ensure that the blood entering the subsequent hemodialysis link is in a low coagulation state as much as possible, thereby ensuring the smooth progress of the dialysis process and improving dialysis safety.

[0068] It should be noted that in the mesh size design described in this embodiment, the mesh diameter is 15 - 20 microns. This size can effectively intercept the tiny thrombi formed in the early stage, whose diameters are usually between 20 - 50 microns, and can also ensure the normal cell components in the blood, such as red blood cells (with a diameter of about 7 - 8 microns), white blood cells (with a diameter of about 10 - 20 microns), etc., to pass through smoothly and maintain the normal flow of blood.

[0069] The mesh distribution adopts a non-uniform distribution design. On the side close to the direction of venous blood inflow, the mesh density is relatively high, which can capture the initially entering coagulation substances more densely; while on the side far from the inflow direction, the mesh density is appropriately reduced to balance the filtration efficiency and the blood flow resistance, avoiding the excessive reduction of blood flow velocity due to over-interception and affecting the dialysis efficiency.

[0070] In an embodiment of the present application, as Figures 1 - 3 shown, the mesh diameter of the upper filter net 4 is 15 - 20 microns, the mesh diameter of the lower filter net 10 is 30 - 50 microns, and its filtration accuracy is lower than that of the upper filter net 4. Both the upper filter net 4 and the lower filter net 10 are made of anticoagulant medical fiber materials.

[0071] It can be understood that the blood inflow and the primary filtration (upper filter net 4): The patient's venous blood flows into the inlet end of the venous kettle body 1 through the venous blood connecting tube 7. Near the inlet end, the replaceable filter cover 3 is installed on the inner side wall of the venous kettle body 1 through the threaded interface 2, and the upper filter net 4 is integrated in the replaceable filter cover 3.

[0072] The upper filter net 4 is woven from heparin-modified polyester fibers, and the mesh diameter is 15 - 20 microns. When the blood flows through here, due to the small mesh size, the larger coagulation factor aggregates with a diameter greater than 20 microns and the tiny thrombi formed in the early stage in the blood, such as the microthrombi with a diameter of 20 - 50 microns, will be physically intercepted on the filter net, thus realizing the primary filtration of the blood and effectively removing most obvious coagulation risks.

[0073] The surface of the upper filter net 4 is coated with an anticoagulant coating with a thickness of 5 - 10 μm, and its component is medical-grade heparin sodium. During the contact process between the blood and the filter net, the anticoagulant coating releases anticoagulant substances, inhibits the activity of coagulation factors in the blood, prevents the further occurrence of the coagulation reaction, reduces the attachment and aggregation of coagulation factors on the filter net, reduces the speed of filter net blockage, and also reduces the formation of new coagulation substances at the source. Medical staff can timely discover coagulation problems by observing whether there is thrombus attachment on the upper filter net 4 and take corresponding measures.

[0074] Secondary filtration of blood (lower filter net 10): Although most of the larger coagulation substances have been removed from the blood that has been initially filtered by the upper filter net 4, there may still be some smaller coagulation factors and fine thrombi. This blood continues to flow downward within the venous pot body 1 and reaches the threaded sleeve 9 located at the lower end inside the venous pot body 1. The lower filter net 10 is threadedly connected to the threaded sleeve 9.

[0075] The lower filter net 10 is also woven from heparin-modified polyester fibers, with a mesh diameter of 30 - 50 microns, and its filtration accuracy is lower than that of the upper filter net 4. This means it can capture the fine coagulation substances with a diameter of 30 - 50 microns that have escaped the initial filtration, further screening the blood and reducing the coagulation components in the blood again.

[0076] The surface of the lower filter net 10 is also coated with an anticoagulant coating with a thickness of 5 - 10 μm (the component is also medical-grade heparin sodium or heparin analog). During the secondary filtration process, it continuously exerts an anticoagulant effect, further inhibiting the adsorption and aggregation of coagulation factors on the filter net, preventing the remaining coagulation substances from forming new thrombi in the subsequent pipeline, and ensuring that the blood entering the subsequent hemodialysis link is in a low coagulation state as much as possible.

[0077] In an embodiment of the present application, as Figures 1 - 3 shown, the outer surface of the replaceable filter cover 3 is provided with anti-slip patterns, and the thread depth of the threaded interface 2 is adapted to the thread length of the replaceable filter cover 3, forming a sealed connection through thread fitting.

[0078] It can be understood that when preparing to use the venous pot, medical staff will first check the integrity and cleanliness of components such as the venous pot body 1 and the replaceable filter cover 3. Pick up the replaceable filter cover 3. Due to the anti-slip patterns on its outer surface, medical staff can grasp it more firmly. Align the replaceable filter cover 3 with the threaded interface 2 on the inner side wall of the venous pot body 1 near the inlet end and start rotating clockwise. Since the thread depth of the threaded interface 2 is adapted to the thread length of the replaceable filter cover 3, during the rotation process, the threads of the two fit tightly and are gradually tightened. When fully tightened, the replaceable filter cover 3 and the threaded interface 2 form a sealed connection through thread fitting. A medical-grade silicone rubber sealing ring is provided between the threaded interface 2 and the replaceable filter cover 3, ensuring the tightness inside the venous pot body 1, preventing external air and impurities from entering, and providing a relatively closed and stable environment for the filtration of blood during the subsequent hemodialysis process. At this time, the upper filter net 4 integrated in the replaceable filter cover 3 is in place and ready to initially filter the blood flowing in from the inlet end of the venous pot body 1.

[0079] During hemodialysis, medical staff will continuously observe the operating status of the venous chamber, with a focus on the upper filter net 4. Since the blood of patients with hypercoagulability has a risk of coagulation, once it is found that the upper filter net 4 has coagulated and makes extraction difficult, it is necessary to promptly replace the replaceable filter cap 3.

[0080] When it is necessary to replace the replaceable filter cap 3, medical staff will strictly follow the aseptic operation specifications. First of all, they will strictly disinfect their hands, wear sterile gloves, and ensure that the operation process is in an aseptic environment. Then, the medical staff will hold the replaceable filter cap 3 with their hands. The anti-slip patterns increase the friction between the hand and the filter cap, enabling them to easily and precisely rotate the replaceable filter cap 3 counterclockwise. Due to the reasonable thread design, the replaceable filter cap 3 can be smoothly unscrewed from the threaded interface 2. After removing the old replaceable filter cap 3, the medical staff will quickly pick up the newly replaceable filter cap 3 that has been strictly disinfected and well-packaged, and again align it with the threaded interface 2 and screw it tightly clockwise according to the initial installation steps to restore the normal filtering function of the venous chamber and ensure that hemodialysis can proceed continuously and smoothly.

[0081] It should be noted that in the product design, the replaceable filter cap 3 and the threaded interface 2 are tightly fitted to form a sealed connection, which can effectively block external pollutants from entering the interior of the venous chamber body 1 during normal use and replacement. On the other hand, the strict aseptic operation specifications followed by medical staff during the replacement operation are the key to preventing contamination. From hand disinfection, wearing sterile gloves to quickly replacing the new replaceable filter cap 3, each step minimizes the chance of external bacteria, impurities and other pollutants coming into contact with the blood inside the venous chamber. Therefore, replacing the filter cap will not cause contamination and can ensure the safety of the hemodialysis process.

[0082] Specifically, in actual hemodialysis treatment, the components of the venous chamber of this hemodialysis tubing work together, and the specific process is as follows:

[0083] 1. Preparation stage: Connect one end of the venous blood connecting tube 7 to the patient's extracorporeal venous blood vessel properly, and the other end is tightly connected to the inlet end of the venous chamber body 1. At the same time, check whether the replaceable filter cap 3 is screwed tightly on the threaded interface 2 to ensure that the upper filter net 4 integrated in the replaceable filter cap 3 is in a normal working state. Confirm that the venous drug delivery tube 8 is connected to the venous chamber body 1 and its anti-blood reflux structure functions normally. At this time, the valve in the one-way valve assembly is in a state that allows the drug to flow into the blood in the venous chamber body 1. In addition, the lower filter net 10 has been threadedly connected firmly to the threaded sleeve 9 located at the lower end inside the venous chamber body 1.

[0084] 2. Blood inflow and primary filtration: Venous blood flows into the venous chamber body 1 through the venous blood connecting tube 7. When flowing through the position near the inner wall of the inlet end, it first contacts the upper filter net 4 integrated in the replaceable filter cover 3. For the blood of patients in a hypercoagulable state who have not used heparin, the upper filter net 4 effectively intercepts the tiny thrombi and aggregates of coagulation factors formed in the early stage of the blood. During this process, medical staff constantly observe whether there is thrombus attachment on the upper filter net 4 and other situations. Once obvious blood clot aggregation is found, they immediately realize that a coagulation problem has occurred and are ready to take corresponding measures, such as adjusting dialysis parameters or adding anticoagulant drugs, etc.

[0085] 3. Drug infusion: If drugs need to be added to the blood for adjuvant treatment during dialysis, the drugs are injected into the blood in the venous chamber body 1 through the venous drug administration tube 8. Due to the anti-blood reflux structure set at the connection between the venous drug administration tube 8 and the venous chamber body 1, the drugs can flow smoothly into the blood. When the blood pressure is abnormal and there is a tendency of backflow, the valve quickly closes tightly, effectively preventing the blood from flowing back into the venous drug administration tube 8, avoiding blood contamination of the drugs, and ensuring the safety and stability of the drug infusion process.

[0086] 4. Coagulation emergency treatment: If the upper filter net 4 coagulates and makes extraction difficult, since one end of the monitoring connecting tube 6 is connected to the venous chamber body 1, and the connection position is above the upper filter net 4, and at the same time the valve 5 is connected to the venous chamber body 1, medical staff quickly open the valve 5 to extract blood to maintain hemodialysis. During this period, prepare to replace the replaceable filter cover 3. Because the outer surface of the replaceable filter cover 3 is provided with anti-slip lines, medical staff can firmly hold it, precisely rotate it counterclockwise, and easily remove it from the threaded interface 2, and quickly replace it with a new replaceable filter cover 3 with a normal upper filter net 4 to solve the blood extraction problem and ensure the continuous and efficient progress of dialysis.

[0087] 5. Blood secondary filtration and outflow: The blood that has undergone primary filtration continues to flow in the venous chamber body 1 and reaches the lower filter net 10 located at the lower end inside the venous chamber body 1 and threadedly connected to the threaded sleeve 9. The lower filter net 10 can further screen the blood, capture the fine coagulation substances that have escaped the primary filtration, and further reduce the coagulation components in the blood. The blood that has completed secondary filtration finally flows out from the outlet end of the venous chamber body 1 and enters the subsequent hemodialysis link to continuously purify the patient's blood and complete the entire hemodialysis treatment process.

[0088] In summary, for the venous chamber of a hemodialysis pipeline in the embodiment of the present application, the design of the replaceable filter cover and the threaded interface makes the replacement of the upper filter net convenient, reduces the consumable cost. The dual filtration structure is for hypercoagulable patients, detecting coagulation in time for the first time and reducing coagulation substances for the second time, improving the safety of dialysis. The monitoring connecting tube and the valve are set to provide a solution for coagulation emergencies and ensure the smooth progress of the dialysis process.

[0089] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0090] In the description of this specification, descriptions with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0091] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A hemodialysis line venous pot, characterized in that: The invention comprises an intravenous pot body (1), a threaded interface (2), a replaceable filter cover (3), an upper filter screen (4), a valve (5), a monitoring connection pipe (6), a threaded sleeve (9) and a lower filter screen (10), wherein: The venous pot body (1) is provided with an inlet end for receiving venous blood and an outlet end for outputting blood; The threaded interface (2) is arranged on the inner wall of the venous pot body (1) close to the inlet end; The replaceable filter cover (3) is threadedly connected to the threaded interface (2), and an upper filter screen (4) is integrated in the replaceable filter cover (3). The upper filter screen (4) is located in the venous pot body (1) and on the path of blood flowing into the inlet end, and is used for initial blood filtration to prevent blood coagulation; One end of the monitoring connection tube (6) is connected to the intravenous pot body (1), and the connection position is located above the upper filter screen (4); The valve (5) is connected to the venous pot body (1), and when blood coagulation occurs in the upper filter screen (4) and blood extraction becomes difficult, the valve (5) is opened to extract blood; The threaded sleeve (9) is arranged at the lower end of the inner part of the venous pot body (1); The lower filter screen (10) is threadedly connected to the threaded sleeve (9) and is located on the path of blood flowing from the venous pot body (1) to the outlet end, and is used for secondary filtering of blood.

2. A hemodialysis line venous pot according to claim 1, characterized in that: It also comprises a venous blood connecting tube (7) and a venous drug administration tube (8), wherein the venous blood connecting tube (7) is connected to the inlet end of the venous pot body (1), and the venous drug administration tube (8) is connected to the venous pot body (1), and a blood backflow prevention structure is provided at the connection point.

3. A hemodialysis line venous pot according to claim 1, characterized in that: The upper filter (4) is used to perform primary filtration on the blood of patients in a hypercoagulable state who have not used heparin, so as to timely detect coagulation problems, and the lower filter (10) performs secondary filtration on the blood filtered by the upper filter (4) to reduce coagulation.

4. A hemodialysis line venous pot according to claim 1, characterized in that: The mesh diameter of the upper filter (4) is 15-20 microns, and the mesh diameter of the lower filter (10) is 30-50 microns, and its filtering accuracy is lower than that of the upper filter (4). Both the upper filter (4) and the lower filter (10) are made of anticoagulant medical fiber material.

5. A hemodialysis line venous pot according to claim 1, characterized in that: The outer surface of the replaceable filter cover (3) is provided with anti-slip grooves, and the thread depth of the threaded interface (2) is adapted to the thread length of the replaceable filter cover (3), so that a sealed connection is formed through thread matching.

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