CRRT equipment

Abstract

The utility model discloses CRRT equipment, and relates to the technical field of medical instruments. The CRRT equipment comprises a plurality of functional modules, and each functional module is provided with an independent control display unit and an independent driving pump and can independently realize respective functions. Each function module is relatively small in size, small in occupied space and convenient to carry and place in special scenes such as an ambulance, a mountain top disaster relief area, a battlefield first-line, a ship and a warship for use. The heparin pump module, the dialysate pump module, the displacement liquid pump module, the blood pump module and the waste liquid pump module can be independently used as independent modules and can also be used in a combined mode. During combined use, the heparin pump module, the dialysate pump module, the displacement liquid pump module and the waste liquid pump module are all in communication connection with the blood pump module and are used for blood purification treatment; when the medical transfusion bag is independently used, various requirements of emergency blood transfusion, transfusion and nutrition delivery in special scenes such as ambulances, mountain top disaster relief areas, first-line battlefields, ships, warships and the like can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a CRRT device. Background Art

[0002] CRRT (Continuous Renal Replacement Therapy) is a blood purification therapy technology that continuously and slowly removes water and solutes through extracorporeal blood purification to replace kidney function. CRRT devices generally use long-term continuous treatment for 24 hours a day or close to 24 hours. The goal is to remove excess water, metabolic wastes and toxins in the body, correct electrolyte disorders, provide certain nutrition, and promote the recovery of kidney function. Common CRRT devices have treatment functions such as dialysis, filtration and ultrafiltration.

[0003] The volume of existing CRRT devices is about 50 Kg to 80 Kg. Most of the time, the devices are used in hospitals, and the moving method is 4 universal casters. The current devices cannot be portable, and they cannot meet the requirements of diverse application scenarios. The application scenarios of the devices have expanded from in-hospital use to ambulances, mountaintop disaster areas, front lines of battlefields, ships, warships, etc., which puts higher requirements on the volume and weight of the devices. Moreover, when used in special scenarios such as ambulances, mountaintop disaster areas, front lines of battlefields, ships, warships, etc., not only blood purification therapy needs to be achieved, but also emergency blood transfusion, infusion and nutrition delivery are required. Existing CRRT devices cannot meet the application scenarios with multiple requirements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a CRRT device that can not only be portable and perform blood purification therapy, but also meet the needs of emergency blood transfusion, infusion and nutrition delivery, and satisfy the application in special scenarios with multiple requirements.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A CRRT device, comprising:

[0007] Multiple functional modules, and the multiple functional modules include a heparin pump module, a dialysate pump module, a replacement fluid pump module, a blood pump module, and a waste liquid pump module. The heparin pump module includes a first control and display unit, a heparin pump, and a heparin pipeline assembly. The first control and display unit is used to control and display the information and parameters of the heparin pump module. The heparin pump provides power for the liquid flow in the heparin pipeline assembly. The dialysate pump module includes a second control and display unit, a dialysate pump, and a dialysate pipeline assembly. The second control and display unit is used to control and display the information and parameters of the dialysate pump module. The dialysate pump provides power for the liquid flow in the dialysate pipeline assembly. The replacement fluid pump module includes a third control and display unit, a replacement fluid pump, and a replacement fluid pipeline assembly. The third control and display unit is used to control and display the information and parameters of the replacement fluid pump module. The replacement fluid pump provides power for the liquid flow in the replacement fluid pipeline assembly. The blood pump module includes a fourth control and display unit, a blood pump, a venous pipeline assembly, and an arterial pipeline assembly. The fourth control and display unit is used to control and display the information and parameters of the blood pump module. The blood pump provides power for the liquid flow in the venous pipeline assembly and the arterial pipeline assembly. The waste liquid pump module includes a fifth control and display unit, a waste liquid pump, and a waste liquid pipeline assembly. The fifth control and display unit is used to control and display the information and parameters of the waste liquid pump module. The waste liquid pump provides power for the liquid flow in the waste liquid pipeline assembly.

[0008] The heparin pump module, the dialysate pump module, the replacement fluid pump module, the blood pump module, and the waste liquid pump module are all used independently as separate modules.

[0009] Or, the heparin pump module, the dialysate pump module, the replacement fluid pump module, and the waste liquid pump module are all communicatively connected to the blood pump module for blood purification treatment.

[0010] As an optional solution of the CRRT device, a first connection structure is provided at the top of each functional module, and a second connection structure is provided at the bottom. The first connection structure and the second connection structure are detachably connected.

[0011] Among the first connection structure and the second connection structure, one is set as a limiting chute, and the other is set as a limiting slide rail. The limiting slide rail is inserted and matched with the limiting chute.

[0012] As an optional solution of the CRRT device, a locking component is further provided on each functional module. The locking component includes a lock catch and an elastic member. One end of the elastic member is fixed to the functional module, and the other end is connected to the lock catch. The elastic member drives the lock catch to expand and contract, and can lock or unlock two adjacent functional modules.

[0013] As an alternative to the CRRT device, the dialysate pump module, the replacement fluid pump module, the blood pump module, and the waste fluid pump module each include a liquid balance control unit, and the liquid balance control unit includes:

[0014] A cavity mechanism, including a balance cavity, in which an elastic diaphragm is provided. The elastic diaphragm divides the balance cavity into two cavities. The liquid entering one of the cavities can drive the elastic diaphragm to make the liquid in the other cavity flow out.

[0015] A valve mechanism, including two valve assemblies. The two valve assemblies are arranged in one-to-one correspondence with the two cavities. Each valve assembly includes two valves. The two valves are respectively connected to the two ends of the cavity, and one of the valves in each of the two valve assemblies is respectively controlled to open, so that one of the cavities is filled with liquid and the other cavity discharges liquid.

[0016] As an alternative to the CRRT device, the balance cavity is a spherical cavity. The cavity mechanism includes a cavity seat, and the cavity seat includes two sub-cavity seats. One side of the sub-cavity seat is provided with a hemispherical concave cavity. The two sub-cavity seats are arranged oppositely, so that the two hemispherical concave cavities enclose to form the spherical cavity, and the elastic diaphragm is arranged between the two hemispherical concave cavities.

[0017] As an alternative to the CRRT device, a first communication cavity is provided on one side of the sub-cavity seat away from the hemispherical concave cavity. At least two connection channels for communicating the hemispherical concave cavity and the first communication cavity are provided between the first communication cavity and the hemispherical concave cavity; both ends of the first communication cavity are respectively connected to one of the valves.

[0018] As an alternative to the CRRT device, the liquid balance control unit further includes a valve body mechanism. The valve body mechanism includes two valve body assemblies. The two valve body assemblies are arranged in one-to-one correspondence with the two valve assemblies. Each valve body assembly includes two valve bodies. Each valve corresponds to one valve body, and the valve is controlled to open through the valve body.

[0019] As an alternative of the CRRT device, the valve includes a valve seat, an elastic pad and a valve cover. A first flow channel, a second flow channel and a second communication cavity are arranged in the valve seat. The first flow channel is connected to the balance cavity, the second flow channel is connected to the pipeline assembly, the first flow channel and the second flow channel are communicated through the second communication cavity. A control port is arranged on the valve cover. The elastic pad is arranged between the valve cover and the valve seat, and the elastic pad is located between the control port and the second communication cavity. The valve core of the valve body passes through the control port and can drive the elastic pad to block the communication port of the first flow channel and the second flow channel to close the valve. When the valve core of the valve body retracts, the elastic pad elastically resumes to open the communication port of the first flow channel and the second flow channel.

[0020] As an alternative of the CRRT device, heating interfaces are arranged on the dialysate pump module, the replacement fluid pump module and the blood pump module, and the heating interfaces are connected to silica gel heating strips.

[0021] As an alternative of the CRRT device, a communication interface and a power interface are arranged on each function module. The communication interface is used to communicate and connect the heparin pump module, the dialysate pump module, the replacement fluid pump module and the waste liquid pump module to the blood pump module through a communication cable. The power interface is used to connect each function module to an external power supply.

[0022] Advantages of the present utility model:

[0023] The CRRT device provided by the present utility model includes a plurality of function modules. Each of the plurality of function modules has an independent control and display unit and a driving pump, and can independently realize its respective functions. The volume of each function module is relatively small, occupying little space, and is convenient to carry and place in special scenarios such as ambulances, mountaintop disaster relief areas, front lines of battlefields, ships, warships, etc. The heparin pump module, the dialysate pump module, the replacement fluid pump module, the blood pump module and the waste liquid pump module can all be used alone as independent modules or can be used in combination. When used in combination, the heparin pump module, the dialysate pump module, the replacement fluid pump module and the waste liquid pump module are all communicatively connected to the blood pump module for blood purification treatment. When used alone, the heparin pump module and the replacement fluid pump module can be used alone to realize the infusion function, the dialysate pump module and the waste liquid pump module can be used alone to realize the function of transporting nutrients, and the blood pump module can be used alone to realize the function of emergency blood transfusion. The CRRT device is not only small in volume and convenient to carry, can realize blood purification treatment and is suitable for application in special scenarios such as ambulances, mountaintop disaster relief areas, front lines of battlefields, ships, warships, etc., but also can meet the various needs of emergency blood transfusion, infusion and transporting nutrients in special scenarios such as ambulances, mountaintop disaster relief areas, front lines of battlefields, ships, warships, etc. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the process of combining each functional module of the CRRT device provided by the embodiment of the present utility model;

[0025] Figure 2 It is a schematic structural diagram of each functional module of the CRRT device provided by the embodiment of the present utility model after combination;

[0026] Figure 3 It is a schematic diagram of the communication connection of each functional module of the CRRT device provided by the embodiment of the present utility model after combination through a communication cable;

[0027] Figure 4 It is a schematic structural diagram of the limit sliding groove at the top of the functional module provided by the embodiment of the present utility model;

[0028] Figure 5 It is a schematic structural diagram of the limit sliding rail at the bottom of the functional module provided by the embodiment of the present utility model;

[0029] Figure 6 It is a schematic structural diagram of the locking component on the functional module provided by the embodiment of the present utility model;

[0030] Figure 7 It is a schematic working principle diagram of each functional module of the CRRT device provided by the embodiment of the present utility model for blood purification treatment;

[0031] Figure 8 It is a front view of each functional module of the CRRT device provided by the embodiment of the present utility model after combination;

[0032] Figure 9 It is a rear view of each functional module of the CRRT device provided by the embodiment of the present utility model after combination;

[0033] Figure 10 It is a left view of each functional module of the CRRT device provided by the embodiment of the present utility model after combination;

[0034] Figure 11 It is a right view of each functional module of the CRRT device provided by the embodiment of the present utility model after combination;

[0035] Figure 12 It is a cross-section of the hidden valve body mechanism of the liquid balance control unit provided by the embodiment of the present utility model Figure 1 ;

[0036] Figure 13 It is an exploded view of the hidden valve body mechanism of the liquid balance control unit provided by the embodiment of the present utility model;

[0037] Figure 14It is a cross-section of the hidden valve body mechanism of the liquid balance control unit provided by the embodiment of the present utility model. Figure 2 ;

[0038] Figure 15 Is Figure 14 The partial enlarged view at position A in

[0039] Figure 16 It is a schematic structural diagram of the valve body mechanism provided by the embodiment of the present utility model;

[0040] Figure 17 It is a schematic structural diagram of the liquid balance control unit provided by the embodiment of the present utility model.

[0041] In the figure:

[0042] 1. Heparin pump module; 2. Dialysate pump module; 3. Replacement fluid pump module; 4. Blood pump module; 5. Waste liquid pump module; 6. Infusion stand;

[0043] 11. First control and display unit; 111. First display screen; 112. First control button; 12. Heparin pipeline assembly; 21. Second control and display unit; 211. Second display screen; 212. Second control button; 22. Dialysate pump; 23. Dialysate pipeline assembly; 24. Dialyzer clamp; 25. Blood leak sensor; 31. Third control and display unit; 311. Third display screen; 312. Third control button; 32. Replacement fluid pump; 33. Replacement fluid pipeline assembly; 41. Fourth control and display unit; 411. Fourth display screen; 412. Fourth control button; 42. Blood pump; 43. Venous pipeline assembly; 44. Arterial pipeline assembly; 45. Venous occlusion clamp; 46. Microbubble detector; 51. Fifth control and display unit; 511. Fifth display screen; 512. Fifth control button; 52. Waste liquid pump; 53. Waste liquid pipeline assembly;

[0044] 101. Limit chute; 1011. Inner groove; 1012. Limit plate; 102. Limit slide rail; 103. Locking assembly; 1031. Lock catch; 1032. Unlock button;

[0045] 200. Balance cavity; 201. Sub-cavity seat; 2011. Hemispherical cavity; 2012. First communication cavity; 2013. Connection channel; 2014. Drainage rib; 202. Elastic diaphragm;

[0046] 301. Valve mechanism; 3011. First flow channel; 3012. Second flow channel; 3013. Second communication cavity; 302. Elastic pad; 303. Valve cover; 3031. Control port;

[0047] 401. Valve body seat; 4011. Slide rail; 402. Valve body; 4021. Valve core; 403. Sliding pressure plate;

[0048] 501. Handling handle; 502. Fixed position of valve body mechanism;

[0049] 601. Liquid level sensor; 602. Liquid level pot; 603. Pressure sensor;

[0050] 701. Heating interface; 702. Communication interface; 703. Power supply interface;

[0051] 801. Silicone heating strip; 802. Communication cable;

[0052] 901. Filter. Detailed implementation manner

[0053] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the present utility model will be further described below with reference to the accompanying drawings and through specific implementation manners.

[0054] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0055] Such as Figures 1 - 8As shown, this embodiment provides a CRRT device, which includes multiple functional modules. The multiple functional modules include a heparin pump module 1, a dialysate pump module 2, a replacement fluid pump module 3, a blood pump module 4, and a waste liquid pump module 5. The heparin pump module 1 includes a first control and display unit 11, a heparin pump, and a heparin pipeline assembly 12. The first control and display unit 11 is used to control and display the information and parameters of the heparin pump module 1. The heparin pump provides power for the liquid flow in the heparin pipeline assembly 12. The first control and display unit 11 is arranged on the front side wall of the heparin pump module 1 and includes a first display screen 111 and a first control button 112. The first display screen 111 is used to display the information and parameters of the heparin pump module 1, and the first control button 112 is used to control the start and stop of the heparin pump module 1. The dialysate pump module 2 includes a second control and display unit 21, a dialysate pump 22, and a dialysate pipeline assembly 23. The second control and display unit 21 is used to control and display the information and parameters of the dialysate pump module 2. The dialysate pump 22 provides power for the liquid flow in the dialysate pipeline assembly 23. The second control and display unit 21 is arranged on the front side wall of the dialysate pump module 2 and includes a second display screen 211 and a second control button 212. The second display screen 211 is used to display the information and parameters of the dialysate pump module 2, and the second control button 212 is used to control the start and stop of the dialysate pump module 2. The replacement fluid pump module 3 includes a third control and display unit 31, a replacement fluid pump 32, and a replacement fluid pipeline assembly 33. The third control and display unit 31 is used to control and display the information and parameters of the replacement fluid pump module 3. The replacement fluid pump 32 provides power for the liquid flow in the replacement fluid pipeline assembly 33. The third control and display unit 31 is arranged on the front side wall of the replacement fluid pump module 3 and includes a third display screen 311 and a third control button 312. The third display screen 311 is used to display the information and parameters of the replacement fluid pump module 3, and the third control button 312 is used to control the start and stop of the replacement fluid pump module 3. The blood pump module 4 includes a fourth control and display unit 41, a blood pump 42, a venous pipeline assembly 43, and an arterial pipeline assembly 44. The fourth control and display unit 41 is used to control and display the information and parameters of the blood pump module 4. The blood pump 42 provides power for the liquid flow in the venous pipeline assembly 43 and the arterial pipeline assembly 44. The fourth control and display unit 41 includes a fourth display screen 411 and a fourth control button 412. The fourth display screen 411 is used to display the information and parameters of the blood pump module 4, and the fourth control button 412 is used to control the start and stop of the blood pump module 4. The waste liquid pump module 5 includes a fifth control and display unit 51, a waste liquid pump 52, and a waste liquid pipeline assembly 53. The fifth control and display unit 51 is used to control and display the information and parameters of the waste liquid pump module 5. The waste liquid pump 52 provides power for the liquid flow in the waste liquid pipeline assembly 53.The fifth control display unit 51 is arranged on the front wall of the waste liquid pump module 5, and includes a fifth display screen 511 and fifth control buttons 512. The fifth display screen 511 is used to display the information and parameters of the waste liquid pump module 5, and the fifth control buttons 512 are used to control the start and stop of the waste liquid pump module 5. Each of the multiple functional modules has an independent control display unit and a driving pump, and can independently implement its respective functions. The volume of each functional module is relatively small, occupying little space, and is convenient for handling and placing in special scenarios such as ambulances, mountaintop disaster relief areas, front lines of battlefields, ships, and warships.

[0056] Optionally, the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, the blood pump module 4, and the waste liquid pump module 5 can all be used separately as independent modules. The heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, the blood pump module 4, and the waste liquid pump module 5 all have independent control and driving functions and can be used as independent modules. When used separately, the heparin pump module 1 and the replacement fluid pump module 3 can both be used alone to achieve the infusion function, the dialysate pump module 2 and the waste liquid pump module 5 can both be used alone to achieve the function of transporting nutrients, and the blood pump module 4 can be used alone to achieve the function of emergency blood transfusion, meeting the multiple needs of emergency blood transfusion, infusion, and transporting nutrients in special scenarios such as ambulances, mountaintop disaster relief areas, front lines of battlefields, ships, and warships.

[0057] Optionally, the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, and the waste liquid pump module 5 are all communicatively connected to the blood pump module 4 for blood purification treatment. When used for blood purification treatment, the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, the waste liquid pump module 5, and the blood pump module 4 are combined together. The heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, and the waste liquid pump module 5 are all communicatively connected to the blood pump module 4, and then the pipeline components in each module are connected to the consumable filter 901 to draw the blood in the human body out to the filter 901 for filtration and purification, and then the filtered and purified blood is transfused back into the human body to achieve blood purification treatment.

[0058] When multiple functional modules are used in combination, there are two ways of communication connection. One is wireless communication connection, that is, communication between each functional module can be achieved through the already mature WIFI and Bluetooth transmissions. When using wireless communication connection, each functional module does not need to be stacked together, and blood purification treatment can also be achieved when placed separately. The other is wired communication connection. As Figure 3 shown, the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, and the waste liquid pump module 5 are all connected to the blood pump module 4 through a communication cable 802, making the blood pump module 4 the main control module. The blood pump module 4 issues instructions to control the operation of the other four functional modules, and the other four functional modules feed back the operation information to the blood pump module 4.

[0059] When the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, and the waste liquid pump module 5 are all connected to the blood pump module 4 through wired communication, it is necessary to stack and combine the various functional modules, which facilitates the connection of the communication cable 802. Specifically, a first connection structure is provided at the top of each functional module, and a second connection structure is provided at the bottom. The first connection structure and the second connection structure are detachably connected, and the various functional modules are stacked and fixed together. By the detachable connection of the first connection structure and the second connection structure, it is convenient to quickly combine and separate the various functional modules, realizing the quick combination of the various functional modules when the various functional modules are combined and used for blood purification treatment through the communication cable 802; when handling or used for emergency blood transfusion, infusion, and nutrient delivery, the various functional modules are quickly separated, which is convenient for carrying and separate use, with better flexibility and is more suitable for application in special scenarios such as ambulances, mountaintop disaster relief areas, front lines of the battlefield, ships, warships, etc.

[0060] Specifically, a communication interface 702 and a power interface 703 are provided on each functional module. The communication interface 702 is used to communicate and connect the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, and the waste liquid pump module 5 to the blood pump module 4 through the communication cable 802; the power interface 703 is used to connect each functional module to an external power source. In this embodiment, a communication interface 702 is provided on the rear side wall of each of the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, and the waste liquid pump module 5, and four communication interfaces 702 are provided on the rear side wall of the blood pump module 4. Four communication cables 802 are provided. One ends of the four communication cables 802 are respectively connected to the communication interfaces 702 on the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, and the waste liquid pump module 5, and the other ends of the four communication cables 802 are respectively connected to the four communication interfaces 702 on the blood pump module 4 to achieve wired communication connection. A power interface 703 is provided on the rear side wall of each of the heparin pump module 1, the dialysate pump module 2, the replacement fluid pump module 3, the waste liquid pump module 5, and the blood pump module 4, and each power interface 703 is connected to an external power source.

[0061] Specifically, as Figure 4 and Figure 5 shown, in the first connection structure and the second connection structure, one of them is set as the limit chute 101, and the other is set as the limit slide rail 102. The limit slide rail 102 is inserted and matched with the limit chute 101. In this embodiment, the first connection structure is set as the limit chute 101, and the second connection structure is set as the limit slide rail 102; that is, a limit chute 101 is provided at the top of the functional module, and a limit slide rail 102 is provided at the bottom. When the functional modules are stacked and used, only the limit slide rail 102 at the bottom of the functional module located above needs to be slid and inserted into the limit chute 101 at the top of the functional module located below from one side of the functional module located below.

[0062] Further, inner grooves 1011 and limiting plates 1012 are provided on opposite sides of the top of the functional module. The limiting plate 1012 is provided on one side opposite to the bottom of the inner groove 1011 and is used to limit the upward movement of the limiting sliding rail 102. The inner groove 1011 and the limiting plate 1012 cooperate to form a limiting sliding groove 101. One end of the inner groove 1011 communicates with the front side of the functional module to form an opening of the limiting sliding groove 101, and the other end of the inner groove 1011 is the limit position of the limiting sliding groove 101. The limiting plate 1012 is provided at one end away from the opening of the limiting sliding groove 101 to facilitate the limiting sliding rail 102 to enter from the opening of the limiting sliding groove 101. L-shaped inner bending plates are provided on opposite sides of the bottom of the functional module. The long arm of the L-shaped inner bending plate is connected to the bottom of the functional module, and the short arm forms the limiting sliding rail 102. The limiting plate 1012 is placed between the short arm and the bottom of the functional module. When the limiting sliding rail 102 abuts against the limit position of the limiting sliding groove 101, it indicates that the functional module is plugged in place.

[0063] Of course, the limiting sliding rail 102 can also be provided on the top of the functional module, and the limiting sliding groove 101 can be provided on the bottom. In other embodiments, the first connection structure and the second connection structure can also be set as a detachable connection method in the form of a card slot and a buckle fit.

[0064] As Figure 3 shown, in this embodiment, the dialysate pump module 2 is stacked above the replacement fluid pump module 3, and the heparin pump module 1 is stacked above the dialysate pump module 2 to form a first stacking group. The waste liquid pump module 5 is stacked above the blood pump module 4 to form a second stacking group. Then, the first stacking group and the second stacking group are combined together and connected through a communication cable 802.

[0065] Further, as Figure 6 shown, a locking assembly 103 is further provided on each functional module. The locking assembly 103 includes a lock catch 1031 and an elastic member. One end of the elastic member is fixed to the functional module, and the other end is connected to the lock catch 1031. The elastic member drives the lock catch 1031 to expand and contract, and can lock or unlock adjacent two functional modules. To ensure the stability of the first stacking group and the second stacking group, the two functional modules after plug-in connection are locked by the locking assembly 103 to prevent loosening.

[0066] In this embodiment, the locking assembly 103 is arranged on the opposite side walls of the functional module and is located below the limit sliding groove 101. Under the elastic force of the elastic member, the latch 1031 is in the extended state and can extend into the limit sliding groove 101 and is located at one end close to the opening of the limit sliding groove 101. The length of the limit sliding rail 102 is less than the length of the limit sliding groove 101, so that after the limit sliding rail 102 is inserted in place in the limit sliding groove 101, the latch 1031 abuts against one end of the limit sliding rail 102 away from the extreme position of the limit sliding groove 101, locking the limit sliding rail 102. When two functional modules are stacked, the elastic member is compressed to make the latch 1031 retract, and then the limit sliding rail 102 of the upper functional module is inserted into the limit sliding groove 101 of the lower functional module, and then the elastic member is released, so that under the restoring action of the elastic force of the elastic member, the latch 1031 extends into the limit sliding groove 101 and abuts against one end of the limit sliding rail 102 away from the extreme position of the limit sliding groove 101.

[0067] Further, in order to prevent the elastic member from being exposed and accidentally touched, the locking assembly 103 further includes an unlocking button 1032. The unlocking button 1032 is arranged outside the elastic member. By pressing the spring downward through the unlocking button 1032, the latch 1031 can be retracted, so that the limit sliding rail 102 can be inserted into the limit sliding groove 101. When the limit sliding rail 102 is inserted in place, the unlocking button 1032 is released, and under the action of the elastic restoring force of the elastic member, the latch 1031 extends into the limit sliding groove 101 and abuts against one end of the limit sliding rail 102 away from the extreme position of the limit sliding groove 101.

[0068] To facilitate hanging liquids and saline during blood purification treatment or emergency blood transfusion, infusion, and nutrient delivery, such as Figure 8 As shown, the CRRT device provided in this embodiment further includes a liquid hanging rack 6, and the liquid hanging rack 6 can be fixed to any functional module by means of bolt connection or the like.

[0069] Further, as Figure 9 shown, in order to facilitate the handling of each functional module, two handling handles 501 are further arranged on one side of the functional module. Handling the functional module through the two handling handles 501 is more convenient and labor-saving. In this embodiment, since the volume of the heparin pump module 1 is relatively small compared to the volumes of the dialysate pump module 2, the replacement fluid pump module 3, the blood pump module 4, and the waste fluid pump module 5, no handling handle 501 is provided on the heparin pump module 1, and two handling handles 501 are provided on the rear side walls of the dialysate pump module 2, the replacement fluid pump module 3, the blood pump module 4, and the waste fluid pump module 5.

[0070] As Figure 7As shown in the figure, during blood purification treatment, the schematic diagram of the connection of the heparin pipeline assembly 12, the dialysate pipeline assembly 23, the replacement fluid pipeline assembly 33, the venous pipeline assembly 43, the arterial pipeline assembly 44 and the filter 901. The arterial pipeline assembly 44 draws blood from the patient's body to the filter 901. The heparin pipeline assembly 12 is connected to the arterial pipeline assembly 44 for inputting heparin into the arterial pipeline assembly 44. The blood after heparin input is filtered and purified by the filter 901. The dialysate pipeline assembly 23 and the replacement fluid pipeline assembly 33 are both connected to the filter 901 assembly for dialysis and replacement of the blood. The venous pipeline assembly 43 and the waste liquid pipeline assembly 53 are also connected to the filter 901. The blood filtered and purified by the filter 901 is transfused back into the patient's body through the venous pipeline assembly 43, and the waste liquid flows into the waste liquid bag through the waste liquid pipeline assembly 53.

[0071] Liquid level pots 602 are provided in the venous pipeline assembly 43, the replacement fluid pipeline assembly 33, the dialysate pipeline assembly 23 and the waste liquid pipeline assembly 53. In order to monitor the liquid level of the liquid level pot 602 and prevent there being no liquid or liquid like foam in the liquid level pot 602, as Figure 10 shown, liquid level sensors 601 are provided on the left side walls of the blood pump module 4, the replacement fluid pump module 3, the dialysate pump module 2 and the waste liquid pump module 5. The liquid level sensors 601 are correspondingly arranged with the liquid level pots 602 in the pipeline assemblies in the functional module for detecting the liquid level of the liquid level pots 602. A venous occlusion clip 45 and a microbubble detector 46 are also provided on the blood pump module 4. The venous occlusion clip 45 and the microbubble detector 46 are both correspondingly arranged with the venous pipeline assembly 43. The venous occlusion clip 45 is used to block the inflow of liquid into the patient's body when the liquid level sensor 601 detects that there is no liquid in the liquid level pot 602 in the venous pipeline assembly 43 or the microbubble detector 46 detects the presence of bubbles in the pipeline assembly and gives an alarm. A blood leakage sensor 25 is provided on the dialysate pump module 2. The blood leakage sensor 25 is used to detect the rupture of the dialyzer and the blood flowing to the outside of the membrane side to prevent excessive blood loss.

[0072] It is necessary to monitor the pressure in the pipeline assemblies in the venous pipeline assembly 43, the arterial pipeline assembly 44, the replacement fluid pipeline assembly 33, the dialysate pipeline assembly 23 and the waste liquid pipeline assembly 53, especially the pressure at the inlet and outlet of the liquid level pot 602. As Figure 10 shown, two pressure sensors 603 are provided on the right side walls of the blood pump module 4, the replacement fluid pump module 3, the dialysate pump module 2 and the waste liquid pump module 5 respectively. The pressure sensors 603 are used to monitor the pressure in each pipeline assembly.

[0073] The filter 901 includes a dialyzer. The dialysate pipeline assembly 23 is connected to the dialyzer. A dialyzer clip 24 is also provided on the dialysate pump module 2. The dialyzer is fixed to the dialysate pump module 2 through the dialyzer clip 24.

[0074] Further, continue to refer to Figure 9 , heating interfaces 701 are provided on the dialysate pump module 2, replacement fluid pump module 3 and blood pump module 4, and the heating interfaces 701 are connected to the silicone heating strips 801. By connecting the silicone heating strips 801 through the heating interfaces 701, the silicone heating strips 801 are used to heat and keep warm the dialysate, replacement fluid and blood, ensuring that the temperatures of the fluid and blood are close to the patient's body temperature, and improving the comfort of the patient. In addition, compared with the heaters in the prior art, the silicone heating strips 801 are small in volume and low in cost; further reducing the volume and cost of the CRRT device, being more convenient to carry, and suitable for special scenarios such as ambulances, mountaintop disaster relief areas, front lines of battlefields, ships, warships, etc.

[0075] During blood purification treatment, it is necessary to precisely control the inflow and outflow balance of each pipeline component. In the prior art, a scale is required to cooperate with the pump for liquid balance measurement, but the equipment using the scale and pump for treatment is large in volume and difficult to be portable and transported in the wild. Due to the problem of inaccurate balance measurement caused by the influence of vibration, bump, shake, tilt, etc. of the scale, it cannot be used in special scenarios such as the wild, warships or disaster relief.

[0076] As Figure 7 , Figures 11 - 17 shown, for the CRRT device provided in this embodiment, the dialysate pump module 2, replacement fluid pump module 3, blood pump module 4 and waste fluid pump module 5 all include a liquid balance control unit, and the liquid balance control unit is used to control the inflow and outflow balance of the liquid.

[0077] Specifically, the liquid balance control unit includes a cavity mechanism, a valve mechanism 301 and a valve body mechanism. Valve body mechanism fixing positions 502 are provided on the dialysate pump module 2, replacement fluid pump module 3, blood pump module 4 and waste fluid pump module 5, and the valve body mechanism is fixed on the valve body mechanism fixing positions 502. After the cavity mechanism and the valve mechanism 301 are assembled, they are installed on the valve body mechanism.

[0078] The cavity mechanism includes a balance cavity 200. An elastic diaphragm 202 is arranged in the balance cavity 200. The elastic diaphragm 202 divides the balance cavity 200 into two cavities. The liquid entering one of the cavities can drive the elastic diaphragm 202 to make the liquid in the other cavity flow out. The valve mechanism 301 includes two valve assemblies. The two valve assemblies are arranged in one-to-one correspondence with the two cavities. Each valve assembly includes two valves. The two valves are respectively connected to the two ends of the cavity. One of the valves in each of the two valve assemblies is respectively controlled to open, so that one valve in each cavity is opened. One cavity intakes liquid through the opened valve, and the other cavity discharges liquid through the opened valve. The pressure in the cavity intaking liquid is greater than the pressure in the cavity discharging liquid. Furthermore, the liquid in the cavity intaking liquid drives the elastic diaphragm 202 to deform, so that the volume of the cavity intaking liquid increases, and the volume of the cavity discharging liquid decreases. Moreover, the liquid intake volume in the cavity intaking liquid is equal to the liquid discharge volume in the cavity discharging liquid. Thus, the liquid intake and discharge balance of the balance cavity 200 is ensured. Since the pressure inside the cavity is relied on in the balance cavity 200 to prompt the elastic diaphragm 202 to deform and change the volumes of the two cavities, the balance cavity 200 will not be affected by factors such as vibration, bump, shake or tilt, and can ensure that the liquid intake volume of the cavity intaking liquid is always equal to the liquid discharge volume of the cavity discharging liquid. Moreover, since the elastic diaphragm 202 is just a layer of film and occupies a small volume, the volume of this liquid balance control unit does not need to be made very large, which is convenient for portability and field handling and is suitable for use in special scenarios such as the field, warships or disaster relief. In addition, since a scale is used in cooperation with a pump for liquid balance measurement in the prior art and the scale is a precision component with a high cost, this liquid balance control unit saves the manufacturing cost.

[0079] Furthermore, the balance cavity 200 is a spherical cavity. By setting the balance cavity 200 as a spherical cavity, the inner wall of the spherical cavity is a spherical wall surface. Under the action of the liquid, the elastic diaphragm 202 is more convenient to completely fit with the spherical wall surface, and it is not easy to form dead corners, resulting in residual air and liquid in the cavity affecting the liquid discharge volume of the cavity discharging liquid, and can ensure that the maximum liquid intake volume and the maximum liquid discharge volume of the cavity are equal to the volume of the balance cavity 200.

[0080] Specifically, as Figure 12 and Figure 13As shown, the cavity mechanism includes a cavity seat, the cavity seat includes two sub-cavity seats 201, a hemispherical cavity 2011 is provided on one side of the sub-cavity seat 201, the two sub-cavity seats 201 are arranged oppositely so that the two hemispherical cavities 2011 enclose a spherical cavity, and an elastic diaphragm 202 is arranged between the two hemispherical cavities 2011. In order to arrange the elastic diaphragm 202 between the two cavities, the cavity seat is set as a split structure, the spherical cavity is formed by the hemispherical cavities 2011 in the two sub-cavity seats 201, and the elastic diaphragm 202 is clamped between the two hemispherical cavities 2011. In this embodiment, the two sub-cavity seats 201 are ultrasonically welded to fuse the elastic diaphragm 202 between the two sub-cavity seats 201. During assembly, first place the elastic diaphragm 202 on the end face of the hemispherical cavity 2011 of one sub-cavity seat 201, then cover the hemispherical cavity 2011 of the other sub-cavity seat 201 on the elastic diaphragm 202. After the two hemispherical cavities 2011 are aligned, ultrasonically weld the gap between the two sub-cavity seats 201 so that the circumference of the elastic diaphragm 202 is fused between the two hemispherical cavities 2011. In other embodiments, the two sub-cavity seats 201 can also be connected by bolts or bonding. When the two sub-cavity seats 201 are connected by bolts, a gasket needs to be arranged between the end faces of the two hemispherical cavities 2011, and then the two sub-cavities, the gasket and the elastic diaphragm 202 are fixedly connected together by bolts to ensure the sealing performance of the balance cavity 200. When the two sub-cavity seats 201 are adhesively fixed, first apply glue on the end face of the hemispherical cavity 2011 of one sub-cavity seat 201, place the elastic diaphragm 202 on the glued end face for bonding, and then apply glue on the circumference of the elastic diaphragm 202, and bond and fix the end face of the hemispherical cavity 2011 of the other sub-cavity seat 201 to the circumference of the elastic diaphragm 202.

[0081] In this embodiment, the elastic diaphragm 202 is a rubber diaphragm. Of course, in other embodiments, the elastic diaphragm 202 can also be a plastic diaphragm made of a plastic film with greater elasticity.

[0082] Further, on the side of the sub-cavity seat 201 away from the hemispherical cavity 2011, a first communication cavity 2012 is provided. Between the first communication cavity 2012 and the hemispherical cavity 2011, at least two connection channels 2013 for connecting the hemispherical cavity 2011 and the first communication cavity 2012 are provided; both ends of the first communication cavity 2012 are each connected to a valve. The liquid entering through one of the valves in the cavity first enters the first communication cavity 2012, and then evenly enters the cavity through at least two connection channels 2013, so that the elastic diaphragm 202 is uniformly stressed in all directions, avoiding the formation of dead spaces, residual air and liquid at a certain position, resulting in a decrease in the liquid output of the other cavity and being unable to meet the requirement that the liquid input and output are equal. In this embodiment, three connection channels 2013 are provided. Two of them are provided corresponding to the two ends of the hemispherical cavity 2011, and the other is provided corresponding to the center of the hemispherical cavity 2011. In this way, the liquid enters the cavity evenly from the upper, middle and lower directions of the hemispherical cavity 2011, acting on the upper, middle and lower positions of the elastic diaphragm 202 respectively, so that the elastic diaphragm 202 is uniformly stressed, and when the elastic diaphragm 202 deforms, it can gradually fit with the upper, middle and lower positions of the other hemispherical cavity 2011 at the same time.

[0083] Of course, in other embodiments, only two connection channels 2013 may be provided corresponding to the two ends of the hemispherical cavity 2011. Or, five connection channels 2013 are provided. In addition to the three connection channels 2013 in this embodiment, another connection channel 2013 is added between the upper and middle positions corresponding to the hemispherical cavity 2011, and another connection channel 2013 is added between the middle and lower positions corresponding to the hemispherical cavity 2011.

[0084] Further, a plurality of drainage ribs 2014 are provided on the inner wall of the hemispherical cavity 2011, and one end of the drainage rib 2014 is communicated with the connection channel 2013. By providing the drainage ribs 2014, the friction between the rubber diaphragm and the inner wall of the hemispherical cavity 2011 is increased, avoiding the rubber diaphragm being unable to separate after fitting with the smooth inner wall of the hemispherical cavity 2011. In this embodiment, the drainage rib 2014 is a groove opened along the meridian of the hemispherical cavity 2011, and ribs are formed by the protrusions on both sides of the groove. One ends of the plurality of drainage ribs 2014 are all communicated with the connection channel 2013 in the middle of the corresponding hemispherical cavity 2011, so that the liquid entering the groove can flow to the connection channel 2013, and then enter the first communication cavity 2012 and be discharged through the valve. Moreover, the liquid flow in the groove has a certain impact on the rubber diaphragm, and can separate the rubber diaphragm from the inner wall of the hemispherical cavity 2011.

[0085] Such as Figures 14 - 17As shown, in order to individually control the two valves in the valve assembly of each cavity, when one valve in one cavity is opened, the other valve is closed; similarly, when one valve in the other cavity is opened, the other valve is closed. The liquid balance control unit further includes a valve body mechanism, the valve body mechanism includes two valve body assemblies, the two valve body assemblies are arranged in one-to-one correspondence with the two valve assemblies, each valve body assembly includes two valve bodies 402, each valve is arranged corresponding to one valve body 402, and the valve is controlled to be opened or closed by the valve body 402. In this embodiment, the valve body 402 is a solenoid valve. Of course, in other embodiments, the valve body 402 can also be a pneumatic on-off valve or an on-off valve with other structures.

[0086] Specifically, the valve includes a valve seat, an elastic pad 302, and a valve cover 303. A first flow channel 3011, a second flow channel 3012, and a second communication cavity 3013 are provided inside the valve seat. The first flow channel 3011 is connected to the balance cavity 200, the second flow channel 3012 is connected to the pipeline assembly, and the first flow channel 3011 and the second flow channel 3012 communicate through the second communication cavity 3013. A control port 3031 is provided on the valve cover 303. The elastic pad 302 is arranged between the valve cover 303 and the valve seat, and the elastic pad 302 is located between the control port 3031 and the second communication cavity 3013. The valve core 4021 of the valve body 402 passes through the control port 3031 and can drive the elastic pad 302 to block the communication port between the first flow channel 3011 and the second flow channel 3012 to close the valve; when the valve core 4021 of the valve body 402 retracts, the elastic pad 302 elastically resumes to open the communication port between the first flow channel 3011 and the second flow channel 3012. When the solenoid valve is powered off, the valve core 4021 is not attracted and is in the extended state. The valve core 4021 passes through the control port 3031 and abuts against the elastic pad 302, and drives the elastic pad 302 to block the communication port between the first flow channel 3011 and the second flow channel 3012 in the second communication cavity 3013. At this time, the valve is closed, and the liquid in the pipeline assembly cannot enter the first flow channel 3011 through the second flow channel 3012, and thus cannot enter the cavity through the first communication cavity 2012 and the connection channel 2013. Similarly, the liquid in the cavity enters the first communication cavity 2012 through the connection channel 2013, and then enters the first flow channel 3011 from the first communication cavity 2012, and also cannot enter the second flow channel 3012 and the pipeline assembly through the second communication cavity 3013. When the solenoid valve is powered on, the valve core 4021 is attracted and contracts, and the valve core 4021 retracts from the control port 3031. The elastic pad 302 resumes between the control port 3031 and the second communication cavity 3013 under the action of its own elastic restoring force. The liquid in the pipeline assembly enters the second communication cavity 3013 through the second flow channel 3012, then enters the first flow channel 3011, enters the first communication cavity 2012 from the first flow channel 3011, and then enters the cavity through the connection channel 2013. Similarly, the liquid in the cavity enters the first communication cavity 2012 through the connection channel 2013, then enters the first flow channel 3011 from the first communication cavity 2012, enters the second flow channel 3012 through the second communication cavity 3013, and finally is discharged to the pipeline assembly.

[0087] In this embodiment, the elastic pad 302 is made of rubber or a metal spring sheet. The valve seat and the valve cover 303 are connected by ultrasonic welding, and the circumference of the elastic pad 302 is clamped between the valve seat and the valve cover 303.

[0088] Specifically, as Figure 9 and Figure 10As shown, the valve body mechanism also includes a valve body seat 401, two valve body components are arranged on one side of the valve body seat 401, the cavity seat is installed on the side of the valve body seat 401 away from the valve body component, and the valve core 4021 corresponding to the four valve bodies 402 is provided with four through holes on the valve body seat 401, and the valve core 4021 can extend into the control port 3031 through the through holes. After the cavity mechanism and the valve mechanism 301 are assembled, the assembly of the cavity mechanism and the valve mechanism 301 is fixed to the valve body mechanism, and the assembly of the cavity mechanism and the valve mechanism 301 is arranged on the opposite sides of the valve body seat 401, so that the four valve bodies 402 are arranged corresponding to the four valves, and the structure is compact, the occupied volume is small, and it is easy to carry and move.

[0089] In order to facilitate the disassembly and assembly of the liquid balance control unit, the valve body mechanism further includes two sliding pressure plates 403, and two slide rails 4011 are relatively arranged on the valve body seat 401. The two ends of the sliding pressure plate 403 are respectively matched with the two slide rails 4011, and the cavity seat is arranged between the two sliding pressure plates 403, and the sides of the two sliding pressure plates 403 close to each other are respectively matched with the two valve assemblies, which can fix the cavity seat between the valve body seat 401 and the two sliding pressure plates 403. The two sliding pressure plates 403 can move on the two slide rails 4011 in the direction of approaching each other or moving away from each other. When installing the assembly of the cavity mechanism and the valve mechanism 301, the two sliding pressure plates 403 are first moved in the direction of moving away from each other so that enough space is left between the two sliding pressure plates 403 to install the assembly of the cavity mechanism and the valve mechanism 301. The assembly of the cavity mechanism and the valve mechanism 301 is installed on the valve body seat 401 so that the four valves are arranged one by one with the four valve bodies 402. Then, the two sliding pressure plates 403 are moved in the direction of approaching each other until they are moved to the side where the two sliding pressure plates 403 are close to each other and respectively engaged with the two valve assemblies, thereby fixing the assembly of the cavity mechanism and the valve mechanism 301 on the valve body seat 401.

[0090] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. CRRT equipment, characterized in that include: A plurality of functional modules, wherein the plurality of functional modules include a heparin pump module (1), a dialysate pump module (2), a replacement fluid pump module (3), a blood pump module (4) and a waste fluid pump module (5); the heparin pump module (1) includes a first control and display unit (11), a heparin pump and a heparin pipeline assembly (12); the first control and display unit (11) is used to control and display information and parameters of the heparin pump module (1); the heparin pump provides power for the flow of liquid in the heparin pipeline assembly (12); the dialysate pump module (2) includes a second control and display unit (21), a dialysate pump (22) and a dialysate pipeline assembly (23); the second control and display unit (21) is used to control and display information and parameters of the dialysate pump module (2); the dialysate pump (22) provides power for the flow of liquid in the dialysate pipeline assembly (23); the replacement fluid pump module (3) includes a third control and display unit (31), a replacement fluid pump (32) and a replacement fluid pipeline assembly (34); The blood pump module (4) comprises a fourth control display unit (41), a blood pump (42), a venous line component (43) and an arterial line component (44); the fourth control display unit (41) is used to control and display information and parameters of the blood pump module (4); the blood pump (42) is used to provide power for the flow of liquid in the venous line component (43) and the arterial line component (44); the waste liquid pump module (5) comprises a fifth control display unit (51), a waste liquid pump (52) and a waste liquid line component (53); the fifth control display unit (51) is used to control and display information and parameters of the waste liquid pump module (5); the waste liquid pump (52) is used to provide power for the flow of liquid in the waste liquid line component (53); The heparin pump module (1), the dialysate pump module (2), the replacement fluid pump module (3), the blood pump module (4) and the waste fluid pump module (5) are all used separately as independent modules; Alternatively, the heparin pump module (1), the dialysate pump module (2), the replacement fluid pump module (3) and the waste fluid pump module (5) are all communicatively connected to the blood pump module (4) for blood purification treatment.

2. The CRRT device according to claim 1, characterized in that: A first connection structure is disposed on the top of each functional module, and a second connection structure is disposed on the bottom thereof, wherein the first connection structure and the second connection structure are detachably connected; One of the first connection structure and the second connection structure is configured as a limiting slide groove (101), and the other is configured as a limiting slide rail (102), and the limiting slide rail (102) is plug-fitted with the limiting slide groove (101).

3. The CRRT device according to claim 2, characterized in that: Each functional module is also provided with a locking assembly (103), wherein the locking assembly (103) comprises a lock buckle (1031) and an elastic member, wherein one end of the elastic member is fixed to the functional module and the other end is connected to the lock buckle (1031), and the elastic member drives the lock buckle (1031) to extend and retract, thereby being able to lock or unlock two adjacent functional modules.

4. The CRRT device according to claim 1, characterized in that: The dialysate pump module (2), the replacement fluid pump module (3), the blood pump module (4) and the waste fluid pump module (5) all include a liquid balance control unit, and the liquid balance control unit includes: A cavity mechanism comprises a balancing cavity (200), wherein an elastic diaphragm (202) is arranged in the balancing cavity (200), and the elastic diaphragm (202) divides the balancing cavity (200) into two cavities, and liquid entering one of the cavities drives the elastic diaphragm (202) to cause liquid in the other cavity to flow out; The valve mechanism (301) comprises two valve assemblies, wherein the two valve assemblies are arranged in a one-to-one correspondence with the two cavities, and each of the valve assemblies comprises two valves, wherein the two valves are respectively connected to the two ends of the cavity, and each of the valves in the two valve assemblies is controlled to open so that liquid enters one of the cavities and liquid exits the other cavity.

5. The CRRT device according to claim 4, characterized in that: The balancing cavity (200) is a spherical cavity, the cavity structure comprises a cavity seat, the cavity seat comprises two sub-cavity seats (201), one side of the sub-cavity seat (201) is provided with a hemispherical cavity (2011), the two sub-cavity seats (201) are arranged opposite to each other so that the two hemispherical cavities (2011) are enclosed to form the spherical cavity, and the elastic diaphragm (202) is arranged between the two hemispherical cavities (2011).

6. The CRRT device according to claim 5, characterized in that: A first connecting cavity (2012) is arranged on a side of the sub-cavity seat (201) away from the hemispherical cavity (2011); at least two connecting channels (2013) for connecting the hemispherical cavity (2011) and the first connecting cavity (2012) are arranged between the first connecting cavity (2012) and the hemispherical cavity (2011); and one of the valves is connected to each of the two ends of the first connecting cavity (2012).

7. The CRRT device according to claim 4, characterized in that: The liquid balance control unit also includes a valve body mechanism, which includes two valve body assemblies. The two valve body assemblies are arranged in a one-to-one correspondence with the two valve assemblies. Each valve body assembly includes two valve bodies (402). Each valve corresponds to one valve body (402), and the valve is controlled to open through the valve body (402).

8. The CRRT device according to claim 7, characterized in that: The valve comprises a valve seat, an elastic pad (302) and a valve cover (303); a first flow channel (3011), a second flow channel (3012) and a second communicating cavity (3013) are arranged in the valve seat; the first flow channel (3011) is connected to the balancing cavity (200); the second flow channel (3012) is connected to the pipeline assembly; the first flow channel (3011) and the second flow channel (3012) are communicated through the second communicating cavity (3013); a control port (3031) is arranged on the valve cover (303); the elastic pad (302) is arranged on the valve cover (303); 3) and the valve seat, and the elastic pad (302) is located between the control port (3031) and the second connecting cavity (3013), the valve core (4021) of the valve body (402) passes through the control port (3031) and can drive the elastic pad (302) to block the connecting port between the first flow channel (3011) and the second flow channel (3012) to close the valve; the valve core (4021) of the valve body (402) retracts, and the elastic pad (302) elastically recovers to open the connecting port between the first flow channel (3011) and the second flow channel (3012).

9. The CRRT device according to any one of claims 1 to 8, characterized in that: The dialysate pump module (2), the replacement fluid pump module (3) and the blood pump module (4) are all provided with a heating interface (701), and the heating interface (701) is connected to a silicone heating strip (801).

10. The CRRT device according to any one of claims 1 to 8, characterized in that: Each of the functional modules is provided with a communication interface (702) and a power supply interface (703). The communication interface (702) is used to connect the heparin pump module (1), the dialysate pump module (2), the replacement fluid pump module (3), and the waste fluid pump module (5) to the blood pump module (4) via a communication cable (802); and the power supply interface (703) is used to connect each functional module to an external power supply.

Images