A CRRT device with carbon dioxide removal function

Abstract

This invention provides a CRRT device with carbon dioxide removal function, relating to the field of medical device technology. It includes a CRRT module, an ECCO2R module, and a tubing module connecting the CRRT module and ECCO2R module into an extracorporeal system. A parallel intermediate flow path with a main path and a secondary path is provided between the CRRT module outlet and the ECCO2R module inlet. The main path has a unidirectional flow guide structure, and the secondary path has a second roller pump. This invention achieves simultaneous support for renal and respiratory functions through a series structure using a single tubing system, avoiding the operational complexity and infection risks associated with multiple punctures and parallel operation of multiple devices. Pressure compensation is achieved through the secondary pump, ensuring carbon dioxide removal efficiency. Furthermore, compared to using only a roller pump to pressurize between the CRRT module and the ECCO2R module, it eliminates the need to consider changes in blood flow during the CRRT module process, effectively avoiding interference with blood flow and reducing the risk of hemolysis and coagulation without requiring an additional flow monitoring module.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a CRRT device with carbon dioxide removal function. Background Technology

[0002] In the treatment of critically ill patients, continuous renal replacement therapy (CRRT) and extracorporeal carbon dioxide removal (ECCO2R) are two crucial extracorporeal life support devices. Currently, CRRT and ECCO2R devices are typically independent systems; when a patient requires simultaneous renal and respiratory support, the clinical protocol involves establishing two separate vascular accesses and operating two independent extracorporeal circulation devices. This necessitates more vascular punctures, a longer total length of extracorporeal tubing, and more blood-contact interfaces.

[0003] For example, the Chinese invention patent with announcement number [CN 119486770 A] describes: providing an intermediate system that can reduce the stress on the CRRT system from the ECMO system when the CRRT system is connected to the ECMO system. An intermediate system (300) is provided at the connection point between an ECMO system (100) and a CRRT system (200), the upstream end of the CRRT system (200) being connected to the ECMO system (100) downstream of the ECMO blood pump (120). The intermediate system (300) includes: an intermediate return line (320) whose upstream end is connected to the downstream end of the CRRT system (200) and whose downstream end is connected to the ECMO system (100); a return pump (321); a return-side pressure buffer (322) provided upstream of the return pump (321); and a control unit (330) that controls the amount of fluid stored within a specified range based on the storage state of the return-side pressure buffer (322). It integrates the CRRT system and connects to the ECMO system, but it requires a complex intermediate system (300) for monitoring and control and does not meet the requirements for widespread configuration in renal replacement therapy devices.

[0004] For example, Chinese invention patent CN 111840780 B, applicable to tubing adapters for blood purification devices during ECMO, describes: A tubing adapter for a blood purification device during ECMO includes a main tube and branch tubes. One end of the main tube is connected to the ECMO drainage tube, and the other end is equipped with a shunt valve. Two branch tubes are provided, namely a first branch tube and a second branch tube, which are respectively connected to the shunt valve. The first branch tube is equipped with a first peristaltic pump, and its outlet is connected to the ECMO oxygenator. The second branch tube is equipped with a second peristaltic pump, and its outlet is connected to a CRRT filter. By organically combining the diversion valve with the first and second peristaltic pumps, the first and second branches each meet the flow and pressure requirements of the pipeline. In particular, the second branch will not trigger a high-pressure alarm due to excessive flow, and no separate flow limiter is needed to change the flow, reducing the risk of hemolysis and thrombosis. It separates the CRRT filter and ECMO oxygenator, and uses peristaltic pumps to control the flow and pressure of each separately. However, the separate flow for CRRT filtration and ECMO oxygenation cannot meet the actual needs in some treatment processes. Based on the problems of the existing technical solutions, the present invention provides a CRRT device with carbon dioxide removal function. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a CRRT device with carbon dioxide removal function, solving the problem of carbon dioxide removal during continuous renal replacement therapy.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A CRRT device with carbon dioxide removal function includes: a CRRT module, an ECCO2R module, and a tubing module that connects the CRRT module and the ECCO2R module into an extracorporeal system.

[0008] The piping module includes:

[0009] A fluid inlet path is connected to the blood inlet of the CRRT module, and a first roller pump is provided at the fluid inlet path;

[0010] The intermediate path connects the blood outlet of the CRRT module and the blood inlet of the ECCO2R module. The intermediate path is equipped with a main path and a secondary path connected in parallel. A unidirectional flow guide component is installed on the main path, and a second roller pump is installed on the secondary path.

[0011] The fluid outlet path is connected to the blood outlet of the ECCO2R module;

[0012] The unidirectional flow guide component ensures smooth flow of fluid from the CRRT module's blood outlet to the ECCO2R module's blood inlet in the main path.

[0013] Preferably, the unidirectional flow guide assembly includes: a hard-walled pipe, with an inlet port and an outlet port respectively provided at both ends of the hard-walled pipe, and a plurality of conical guides distributed in the same direction fixedly provided on the inner side of the hard-walled pipe.

[0014] Preferably, it includes: a base plate, a motor housing is fixedly connected to the top of the base plate, the first roller pump and the second roller pump are both mounted on the motor housing, a control interaction module is fixedly mounted on one side of the motor housing, and the control interaction module is electrically connected to the first roller pump and the second roller pump.

[0015] Preferably, it further includes: a T-shaped component fixedly mounted on the top of the substrate, wherein a device housing is hinged to the back of the T-shaped component, and two sets of device housings are symmetrically arranged along the central axis of the T-shaped component, the two sets of device housings being used to install the CRRT module and the ECCO2R module respectively.

[0016] Both the first roller pump and the second roller pump are installed on the side of the motor housing facing the T-shaped component.

[0017] Preferably, the equipment housing includes: a box shell, a connecting frame fixedly provided on one side of the box shell, and the end of the connecting frame away from the box shell is hinged to a T-shaped piece.

[0018] A bottom plate is fixedly connected to the inside of the housing. An L-shaped outer plate is installed on the top of the bottom plate by screws. A baffle is fixedly connected to the inside of the housing and to the outside of the L-shaped outer plate.

[0019] Preferably, a locking block is also designed, which is engaged at the top of the T-shaped piece, and the locking block has a stop located between the two housings to limit the opening of the housings.

[0020] Preferably, the locking block includes: a top plate, a stop block, and a clamping member. The top plate and the stop block are fixedly connected in an L-shape, and the clamping member is fixedly connected to the bottom of the top plate. The clamping member is used to fix and clamp the T-shaped member.

[0021] Preferably, the clamping member comprises two sets of symmetrically distributed metal parts, the middle of which is bent inward and the ends of which are bent outward.

[0022] Preferably, the first roller pump includes: a motor plate, the motor plate is fixedly installed inside the motor housing, a servo motor is fixedly installed on the side of the motor plate, the output end of the servo motor passes through the motor plate and is fixedly connected to a turntable, a plurality of rotating shafts arranged in a circular array are fixedly connected along the edge of the turntable, a pressing wheel is rotatably installed on the rotating shaft, and a star frame component is fixedly connected to the ends of the plurality of rotating shafts arranged in a circular array.

[0023] The outer side of the motor housing is fixedly connected to a U-shaped outer shell corresponding to the outer side of the extrusion wheel.

[0024] Preferably, a gap area for accommodating the pipeline module is provided between the motor housing and the equipment housing.

[0025] This invention provides a CRRT device with carbon dioxide removal function. It has the following beneficial effects:

[0026] 1. This invention designs a tubing module that connects a CRRT module and an ECCO2R module in series to form an integrated extracorporeal circulation system. A parallel intermediate flow path with a main path and a secondary path is set between the CRRT module outlet and the ECCO2R module inlet. The main path has a unidirectional flow guide structure, and the secondary path has a second roller pump. Firstly, the series structure enables a single tubing system to simultaneously support renal and respiratory functions, avoiding the operational complexity and infection risks associated with multiple punctures and parallel operation of multiple devices. Secondly, the unique parallel pressurized flow path design effectively solves the problem of decreased ECCO2R module efficiency due to the attenuation of blood flow pressure at the CRRT module outlet. Addressing industry challenges, the system utilizes a secondary pump to achieve pressure compensation, ensuring efficient carbon dioxide removal. Furthermore, compared to using only a roller pump to pressurize between the CRRT and ECCO2R modules, it eliminates the need to consider changes in blood flow during the CRRT process, effectively preventing interference with blood flow and reducing the risk of hemolysis and coagulation without requiring an additional flow monitoring module. Thirdly, the synergistic effect of the main unidirectional flow-guiding structure and the secondary booster pump prevents blood backflow from interfering with the treatment process and gives the system the ability to flexibly switch power modes according to clinical needs, significantly enhancing treatment accuracy and reliability while improving blood compatibility. Attached Figure Description

[0027] Figure 1 This is a model diagram of a CRRT device with carbon dioxide removal function proposed in this invention;

[0028] Figure 2 This is a schematic diagram of the pipeline connection principle of a CRRT device with carbon dioxide removal function proposed in this invention;

[0029] Figure 3 This is a schematic diagram of a unidirectional flow guide component of a CRRT device with carbon dioxide removal function proposed in this invention;

[0030] Figure 4 This is a perspective view of a CRRT device with carbon dioxide removal function proposed in this invention;

[0031] Figure 5This is a front view of a CRRT device with carbon dioxide removal function proposed in this invention;

[0032] Figure 6 This is a top view of a CRRT device with carbon dioxide removal function proposed in this invention;

[0033] Figure 7 This is a second-view perspective perspective view of a CRRT device with carbon dioxide removal function proposed in this invention;

[0034] Figure 8 This is a perspective view of the locking block of a CRRT device with carbon dioxide removal function proposed in this invention;

[0035] Figure 9 This is a perspective view of the T-shaped frame and mounting housing of a CRRT device with carbon dioxide removal function proposed in this invention;

[0036] Figure 10 This is a three-dimensional schematic diagram of the first peristaltic pump of a CRRT device with carbon dioxide removal function proposed in this invention;

[0037] Figure 11 for Figure 7 A magnified view of a portion of point A in the middle.

[0038] The components include: 1. CRRT module; 2. ECCO2R module; 3. Piping module; 3a. Inlet path; 3b. Intermediate path; 3c. Outlet path; 4. Inlet interface; 5. One-way flow guide assembly; 501. Rigid wall pipe; 502. Conical guide; 6. Outlet interface; 7. Base plate; 8. Motor housing; 9. Control interaction module; 10. First roller pump; 1001. U-shaped housing; 1002. Motor board; 1003. Servo motor; 1004, turntable; 1005, rotating shaft; 1006, extrusion roller; 1007, star frame component; 11, second roller pump; 12, locking block; 1201, top plate; 1202, stop block; 1203, clamping component; 13, T-shaped component; 14, equipment housing; 1401, box shell; 1402, connecting frame; 1403, L-shaped outer plate; 1404, bottom plate; 1405, screw component; 1406, baffle component. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figures 1-11 As shown, this embodiment of the invention provides a CRRT device with carbon dioxide removal function, including: CRRT module 1, ECCO2R module 2, and piping module 3 connecting CRRT module 1 and ECCO2R module 2 into an extracorporeal system.

[0042] CRRT module 1 is the core of this device for blood purification. Based on the principle of continuous renal replacement therapy, it mainly undertakes solute removal, ultrafiltration, and fluid management functions. The core component is a disposable blood purifier, which contains thousands of hollow fiber membranes made of biocompatible materials (such as polysulfone and polyethersulfone). The membrane walls have specific pore sizes, allowing water, small molecule toxins (such as creatinine and urea nitrogen), and electrolytes to pass through, while effectively retaining formed elements in the blood (such as blood cells and proteins). Those skilled in the art know that, in addition to the connection of the tubing module 3, CRRT module 1 should also be designed with replacement fluid tubing and filtrate tubing. The replacement fluid tubing includes a replacement fluid bag connection port and corresponding delivery tubing, used to inject sterile replacement fluid into the blood in a "pre-dilution" and / or "post-dilution" manner to optimize solute removal efficiency and regulate patient volume. The filtrate tubing includes tubing connected to the filtrate port of the blood purifier, a filtrate pump, and a blood leakage detector. The filtrate pump is used to control the ultrafiltration rate and dehydration volume to achieve precise fluid balance management; the blood leak detector is used to monitor in real time whether blood cells are present in the filtrate, serving as an early safety alarm for membrane rupture in the blood purifier.

[0043] ECCO2R module 2 is the core of this device's gas exchange system. Based on the principle of extracorporeal membrane oxygenation (ECMO), it focuses on efficiently removing carbon dioxide from the blood. The core component is a disposable membrane gas exchanger, commonly known as an "artificial lung." Its internal structure is also a hollow fiber bundle, but the fiber membrane material prioritizes extremely high gas permeability (often using polymethylpentene). Micropores in the fiber walls allow free gas diffusion while effectively preventing plasma leakage. It employs a "gas inside the fiber, blood outside the fiber" model, with blood flowing outside the fiber and fresh purge gas flowing inside. Those skilled in the art know that, in addition to the connection to the piping module 3, ECCO2R module 2 should also include a gas module, comprising a purge gas source interface, a precision gas flow controller, and an exhaust port. The gas flow controller precisely regulates the purge gas flow rate to control the intensity of carbon dioxide removal; the exhaust port safely discharges carbon dioxide-rich waste gas.

[0044] The pipeline module 3 includes: an inlet path 3a connected to the blood inlet of the CRRT module 1, with a first roller pump 10 installed at the inlet path 3a to provide power to the liquid in the inlet path 3a, ensuring a stable flow of blood drawn from the human body through the inlet path 3a; an intermediate path 3b connected between the blood outlet of the CRRT module 1 and the blood inlet of the ECCO2R module 2, which is used for blood flow between the CRRT module 1 and the ECCO2R module 2 and to pressurize the blood flow (the blood pressure after passing through the CRRT module 1 is insufficient to reliably ensure its passage through the ECCO2R module 2); a main path and a secondary path connected in parallel in the intermediate path 3b; a unidirectional flow guide component 5 installed on the main path to ensure smooth flow of liquid from the blood outlet of the CRRT module 1 to the blood inlet of the ECCO2R module 2; and an outlet path 3c connected to the blood outlet of the ECCO2R module 2.

[0045] Blood drawn from the human body passes through inlet channel 3a, where the first roller pump 10 powers the liquid within 3a. The operating conditions (power and speed) of the first roller pump 10 are controlled according to the designed flow rate. The blood flow rate changes as it passes through the CRRT module 1 (main blood pump flow rate Q). main = CRRT outflow rate Q crrt + Filtrate flow rate Q ultrafiltrate The blood fluid pressure is reduced, and the flow rate of blood after passing through CRRT module 1 is not easy to control or calculate. By designing a main circuit and a secondary circuit in parallel, the second roller pump 11 is used to control the flow rate on the secondary circuit. Generally, the flow rate maintained by the second roller pump 11 under the working condition is less than the flow rate maintained by the first roller pump 10 under the working condition. Additional unstable factors are maintained by the main circuit to keep the blood flow.

[0046] This embodiment designs a tubing module 3 to connect the CRRT module 1 and the ECCO2R2 module in series into an integrated extracorporeal circulation system. A parallel intermediate flow path with a main path and a secondary path is set between the outlet of the CRRT module 1 and the inlet of the ECCO2R module 2. The main path has a unidirectional flow guide structure, and the secondary path has a second roller pump. Firstly, the series structure enables a single tubing system to simultaneously support renal and respiratory functions, avoiding the operational complexity and infection risks associated with multiple punctures and parallel operation of multiple devices. Secondly, the unique parallel pressurized flow path design effectively solves the problem of reduced ECCO2R module efficiency due to the attenuation of blood flow pressure at the CRRT module outlet. To address the industry challenge of reducing blood flow, a secondary pump is used to compensate for pressure and ensure efficient carbon dioxide removal. Furthermore, compared to using only a roller pump to pressurize between the CRRT and ECCO2R modules, this system eliminates the need to consider changes in blood flow during the CRRT process and avoids impacting blood flow without requiring an additional flow monitoring module, thus reducing the risk of hemolysis and coagulation. Thirdly, the synergistic effect of the main unidirectional flow-guiding structure and the secondary booster pump prevents blood backflow from interfering with the treatment process and gives the system the ability to flexibly switch power modes according to clinical needs, significantly enhancing the accuracy and reliability of treatment while improving blood compatibility.

[0047] In one embodiment, such as Figure 3 As shown, the unidirectional flow guide assembly 5 includes: a hard-walled pipe 501, with an inlet port 4 and an outlet port 6 respectively provided at both ends of the hard-walled pipe 501, and a plurality of conical guides 502 distributed in the same direction fixedly provided on the inner side of the hard-walled pipe 501.

[0048] When the liquid in the main path flows from the blood outlet of CRRT module 1 to the blood inlet of ECCO2R module 2, the blood can flow steadily under the guidance of the conical guide 502; if the flow is reversed, the conical guide 502 will obstruct the flow from the small end to the large end.

[0049] Example 2

[0050] Based on the CRRT device with carbon dioxide removal function in Embodiment 1, a base plate 7 is designed for easy use in clinical treatment. A motor housing 8 is fixedly connected to the top of the base plate 7. The first roller pump 10 and the second roller pump 11 are both mounted on the motor housing 8, which provides the mounting position for the first roller pump 10 and the second roller pump 11. A control interaction module 9 is fixedly mounted on one side of the motor housing 8. The control interaction module 9 is electrically connected to the first roller pump 10 and the second roller pump 11. The hardware of the control interaction module 9 includes a display unit, a processing unit, an interaction unit, and necessary data interface units. The control interaction module 9 is used to regulate the working status of the first roller pump 10 and the second roller pump 11 and to display the status. Preferably, the display unit of the control interaction module 9 is a touch screen.

[0051] To ensure the effective operation of the equipment, a backup roller pump corresponding to the first roller pump 10 and the second roller pump 11 can also be designed.

[0052] In one embodiment, a T-shaped component 13 is also designed and fixedly installed on the top of the substrate 7. A device housing 14 is hinged to the back of the T-shaped component 13. Two sets of device housings 14 are symmetrically arranged along the central axis of the T-shaped component 13. The two sets of device housings 14 are used to install the CRRT module 1 and the ECCO2R module 2, respectively, making it more convenient to arrange the CRRT module 1 and the ECCO2R module 2.

[0053] The first roller pump 10 and the second roller pump 11 are both installed on the side of the motor housing 8 facing the T-shaped part 13. The pipeline in the pipeline module 3 generally uses disposable flexible hoses, which can be installed at the first roller pump 10 and the second roller pump 11.

[0054] Based on the above structural design, a gap area is formed between the motor housing 8 and the equipment housing 14 to accommodate the pipeline module 3. The pipeline module 3 is distributed in the gap area, which can protect the pipeline module 3 during actual use.

[0055] In one embodiment, the equipment housing 14 includes: a box shell 1401, a connecting frame 1402 fixedly disposed on one side of the box shell 1401, and the end of the connecting frame 1402 away from the box shell 1401 is hinged to a T-shaped member 13; a bottom plate 1404 is fixedly connected inside the box shell 1401, an L-shaped outer plate 1403 is installed on the top of the bottom plate 1404 by screws 1405, and a baffle member 1406 is fixedly connected inside the box shell 1401 and outside the L-shaped outer plate 1403.

[0056] The housing 1401 can rotate as a whole with the connecting frame 1402, so that the opening side of the housing 1401 faces the side, which facilitates the arrangement of CRRT module 1 and ECCO2R module 2. The L-shaped outer plate 1403 and the baffle 1406 work together to fix CRRT module 1 and ECCO2R module 2.

[0057] In one embodiment, a locking block 12 is also designed, which is engaged on the top of the T-shaped member 13, and the locking block 12 has a stop 1202 located between the two device housings 14 for limiting the opening of the device housings 14.

[0058] After installing CRRT module 1 and ECCO2R module 2 in the two device housings 14 respectively, rotate the two device housings 14 toward the motor housing 8 and install locking block 12 to restrict the opening of the device housings 14.

[0059] In one embodiment, the locking block 12 includes: a top plate 1201, a stop block 1202, and a clamping member 1203. The top plate 1201 and the stop block 1202 are fixedly connected in an L-shape. The clamping member 1203 is fixedly connected to the bottom of the top plate 1201 and is used to fix and clamp the T-shaped member 13.

[0060] Specifically, the clamping member 1203 includes two sets of symmetrically distributed metal parts, with the middle part of the metal parts bent inward and the end part of the metal parts bent outward.

[0061] The end of the metal part bends outward to serve as a guide, while the middle part of the metal part bends inward to elastically clamp the T-shaped part 13, thereby connecting the locking block 12 and the T-shaped part 13.

[0062] In one embodiment, the first roller pump 10 includes: a motor plate 1002, which is fixedly installed inside the motor housing 8. A servo motor 1003 is fixedly installed on the side of the motor plate 1002. The output end of the servo motor 1003 passes through the motor plate 1002 and is fixedly connected to a turntable 1004. A plurality of rotating shafts 1005 arranged in a ring array are fixedly connected along the edge of the turntable 1004. A pressing wheel 1006 is rotatably installed on the rotating shaft 1005. A star frame member 1007 is fixedly connected to the ends of the plurality of rotating shafts 1005 arranged in a ring array. A U-shaped outer shell 1001 corresponding to the outer side of the pressing wheel 1006 is fixedly connected to the outer side of the motor housing 8, forming a C-shaped area for accommodating the hose.

[0063] During assembly, the pipe is clamped in the C-shaped area that accommodates the hose. When the first roller pump 10 is running, the servo motor 1003 drives the turntable 1004 to rotate. The turntable 1004, the rotating shaft 1005, and the extrusion roller 1006 all rotate. The extrusion roller 1006 extrudes the pipe in the C-shaped area to form the roller pump system.

[0064] It is worth noting that the device designed in Example 2 can be installed with a CRRT module alone, i.e., the traditional pure CRRT mode, or the ECCO2R module alone, i.e., the traditional pure gas exchange mode, or the combined treatment mode in Example 1, depending on actual needs.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CRRT device with carbon dioxide removal function, comprising: The CRRT module (1), the ECCO2R module (2), and the piping module (3) connecting the CRRT module (1) and the ECCO2R module (2) into an extracorporeal system are characterized by: Piping module (3) includes: A liquid inlet path (3a) is connected to the blood inlet of the CRRT module (1), and a first roller pump (10) is provided at the liquid inlet path (3a). The intermediate path (3b) is connected between the blood outlet of the CRRT module (1) and the blood inlet of the ECCO2R module (2). The intermediate path (3b) is provided with a main path and a secondary path connected in parallel. A unidirectional flow guide component (5) is installed on the main path, and a second roller pump (11) is installed on the secondary path. The liquid outlet path (3c) is connected to the blood outlet of the ECCO2R module (2); The unidirectional flow guide component (5) allows the liquid in the main path to flow smoothly from the blood outlet of the CRRT module (1) to the blood inlet of the ECCO2R module (2).

2. The CRRT device with carbon dioxide removal function according to claim 1, characterized in that, The unidirectional flow guide assembly (5) includes: a hard-walled pipe (501), with an inlet port (4) and an outlet port (6) respectively provided at both ends of the hard-walled pipe (501), and a plurality of conical guides (502) distributed in the same direction are fixedly provided on the inner side of the hard-walled pipe (501).

3. A CRRT device with carbon dioxide removal function according to claim 1, characterized in that, include: The base plate (7) has a motor housing (8) fixedly connected to its top. The first roller pump (10) and the second roller pump (11) are both mounted on the motor housing (8). A control interaction module (9) is fixedly mounted on one side of the motor housing (8). The control interaction module (9) is electrically connected to the first roller pump (10) and the second roller pump (11).

4. A CRRT device with carbon dioxide removal function according to claim 3, characterized in that, Also includes: A T-shaped component (13) is fixedly installed on the top of the substrate (7). A device housing (14) is hinged to the back of the T-shaped component (13). Two sets of device housings (14) are symmetrically arranged along the central axis of the T-shaped component (13). The two sets of device housings (14) are used to install the CRRT module (1) and the ECCO2R module (2), respectively. The first roller pump (10) and the second roller pump (11) are both installed on the side of the motor housing (8) facing the T-shaped piece (13).

5. A CRRT device with carbon dioxide removal function according to claim 4, characterized in that, The device housing (14) includes: A housing (1401) is provided with a connecting frame (1402) fixedly installed on one side of the housing (1401), and the end of the connecting frame (1402) away from the housing (1401) is hinged to the T-shaped piece (13); The box shell (1401) is fixedly connected to the inside of a bottom plate (1404), and an L-shaped outer plate (1403) is installed on the top of the bottom plate (1404) by screws (1405). A baffle (1406) is fixedly connected to the inside of the box shell (1401) and outside the L-shaped outer plate (1403).

6. A CRRT device with carbon dioxide removal function according to claim 5, characterized in that, It also includes a locking block (12), which is engaged on the top of the T-shaped piece (13) and has a stop (1202) located between the two device housings (14) for limiting the opening of the device housing (14).

7. A CRRT device with carbon dioxide removal function according to claim 6, characterized in that, The locking block (12) includes: a top plate (1201), a stop block (1202), and a clamping member (1203). The top plate (1201) and the stop block (1202) are fixedly connected in an L-shape. The clamping member (1203) is fixedly connected to the bottom of the top plate (1201) and is used to fix and clamp at the T-shaped member (13).

8. A CRRT device with carbon dioxide removal function according to claim 7, characterized in that: The clamping member (1203) includes two sets of symmetrically distributed metal parts, the middle of which is bent inward and the ends of which are bent outward.

9. A CRRT device with carbon dioxide removal function according to claim 3, characterized in that: The first roller pump (10) includes: A motor plate (1002) is fixedly installed on the inner side of the motor housing (8). A servo motor (1003) is fixedly installed on the side of the motor plate (1002). The output end of the servo motor (1003) passes through the motor plate (1002) and is fixedly connected to a turntable (1004). Several rotating shafts (1005) arranged in a ring array are fixedly connected along the edge of the turntable (1004). A pressing wheel (1006) is rotatably installed on the rotating shaft (1005). A star frame component (1007) is fixedly connected to the end of the several rotating shafts (1005) arranged in a ring array. The outer side of the motor housing (8) is fixedly connected to a U-shaped outer shell (1001) corresponding to the outer side of the extrusion wheel (1006).

10. A CRRT device with carbon dioxide removal function according to claim 4, characterized in that: A gap area for accommodating the pipeline module (3) is provided between the motor housing (8) and the equipment housing (14).

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