Low-flow blood purification and hemodynamic stabilization device for combined protection of heart and kidney

Abstract

The invention relates to the field of blood purification devices, and discloses a low-flow blood purification and hemodynamic stabilization device for heart and kidney combined protection, which comprises an operation cabinet body, a groove is formed in the operation cabinet body, a moving assembly is arranged in the groove, and the moving assembly is used for driving a pipeline fixing assembly to move. And the pipeline fixing assembly comprises a fixing plate, the upper surface of the fixing plate is fixedly connected with a second driving motor, and the output end of the second driving motor is fixedly connected with a rotating block through a rotating shaft. A blood guide tube, a blood return tube and the like can be independently positioned and fixed, the pipeline fixing assembly can be unfolded for use, the overlapping area of the clamping rings on the support can be effectively reduced after unfolding, the effective placement points of the clamping rings are increased, and then the requirement for synchronous fixing of multiple pipelines needed by the device can be fully met; meanwhile, when the pipeline fixing assembly is not used, the whole pipeline fixing assembly can be retracted into the groove.

Description

Technical Field

[0001] This invention relates to the field of blood purification device technology, specifically a low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection. Background Technology

[0002] The low-flow blood purification and hemodynamic stabilization device with combined cardiorenal protection is a treatment tool in the field of critical care medicine for critically ill patients with cardiorenal syndrome, severe infections complicated by multiple organ dysfunction, etc. It performs blood purification in a low-flow mode of 50-200 ml / min, efficiently removing toxins and excess water from the body while precisely controlling blood flow velocity and maintaining blood volume balance. This achieves combined protection of cardiac and renal functions, avoiding hemodynamic disturbances caused by flow fluctuations in traditional blood purification. It supports the stabilization of the condition and subsequent treatment of critically ill patients. The device establishes a closed-loop pathway with the body's arteries and veins through multiple connecting tubes.

[0003] When using this device, the drainage line is connected to the patient's artery via a puncture needle. After the blood flows out through the drainage line, an anticoagulant is injected through the anticoagulant branch to prevent clotting. Then, a low-flow control pump delivers the blood to the blood purification device at a stable flow rate, where it exchanges toxins and electrolytes with the replacement fluid. The purified blood is then returned to the patient's vein through the return line. Throughout the process, pressure and flow monitoring nodes provide real-time data feedback, dynamically adjusting the pump speed and ultrafiltration volume to ensure hemodynamic stability. The entire treatment process relies on multiple sets of connecting tubes with different functions. In addition to the core drainage and return lines, auxiliary lines such as the replacement fluid delivery line must also be connected simultaneously. All these lines together constitute a complete treatment pathway.

[0004] The current device needs to perform multiple functions such as blood ducting, blood return, and anticoagulation. It is equipped with multiple connecting tubes during use. These tubes are of different lengths and have independent functions. They lack a dedicated organization and fixing structure. After the tubes are connected, medical staff need to use ropes to wrap and tie all the connecting tubes before fixing them to the bed armrest or bed rail. However, this binding not only easily leads to the tubes getting tangled and knotted, but also causes local bending and pressure on the tubes, directly causing narrowing or even partial occlusion of the lumen. Restricted lumen will cause a sudden drop in blood flow velocity and abnormal pressure fluctuations, affecting the treatment effect.

[0005] Therefore, the purpose of this invention is to provide a low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection, in order to overcome the shortcomings of the prior art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection. It solves the problem of the lack of a dedicated structure for organizing and fixing the connecting tubes. When medical staff use the device, after connecting the tubes, they need to wrap and bind all the connecting tubes with ropes before fixing them to the bed armrest or bed rail. This binding can easily cause the tubes to become tangled and knotted. At the same time, tangling and knotting can cause local bending and compression of the tubes, directly causing narrowing or even partial occlusion of the lumen. Restriction of the lumen can lead to a sudden drop in blood flow velocity and abnormal pressure fluctuations, affecting the treatment effect.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection, comprising an operating cabinet, wherein the operating cabinet has a groove inside, and a moving component is disposed inside the groove. The moving component is used to drive a pipeline fixing component to move. The pipeline fixing component includes a fixing plate, a second drive motor is fixedly connected to the upper surface of the fixing plate, and a rotating block is fixedly connected to the output end of the second drive motor via a rotating shaft. A first guide groove is provided inside the rotating block, and a fixing column is disposed inside the first guide groove. A second connecting rod is fixedly connected to the upper surface of the fixing column. A fixing block is fixedly connected to the lower surface of the fixing plate, and a second guide groove is provided inside the fixing block. The inner surface of the second guide groove is slidably connected to the second connecting rod. A retaining ring is fixedly connected to the second connecting rod via a bracket, and an anti-slip elastic pad is fixedly connected to the inner surface of the retaining ring.

[0008] Preferably, the movable component includes a fixed rod, the inner wall of the groove is fixedly connected to the fixed rod, the fixed rod has a sliding groove inside, a slider is slidably connected to the inner surface of the sliding groove, and a lead screw is threadedly connected to the inner surface of the slider.

[0009] Preferably, a first drive motor is fixedly connected to the right surface of the fixed rod, the output end of the first drive motor is fixedly connected to the lead screw, a first support frame is fixedly connected to the lower surface of the slider through a first connecting rod, and the upper surface of the fixed plate is fixedly connected to the first support frame.

[0010] Preferably, a lithium battery is fixedly connected to the upper surface of the fixing plate.

[0011] Preferably, the operating cabinet is equipped with a low-flow control pump, a drain tube is fixedly connected to the left surface of the low-flow control pump, and an anticoagulant branch tube is fixedly connected to the side surface of the drain tube.

[0012] Preferably, the low-flow control pump is connected to the blood purification device via a delivery pipe, and the blood purification device forms a blood return path via a return blood vessel.

[0013] Preferably, a fixing post is fixedly connected to the left surface of the operating cabinet, a second support frame is provided inside the fixing post, a crossbar is fixedly connected to the upper surface of the second support frame, and a hanging ring is provided on the crossbar.

[0014] Preferably, the control cabinet is equipped with a controller, and the controller is equipped with a display screen.

[0015] Preferably, there are multiple retaining rings and four brackets arranged in a ring.

[0016] Preferably, the lower surface of the control cabinet is fixedly connected with a movable locking wheel.

[0017] This invention provides a low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection. It offers the following advantages:

[0018] 1. This invention, through the setting of grooves, moving components, and pipe fixing components, can individually position and fix connecting pipes such as inlet and outlet blood vessels. The inner wall of the retaining ring is provided with an anti-slip elastic pad, which can lock the pipe to prevent displacement. At the same time, the physical separation solves the problem of pipes tangling and bending caused by traditional binding, ensuring the unobstructed lumen, preventing sudden drops in blood flow velocity and abnormal pressure fluctuations, and ensuring stable treatment effect.

[0019] 2. The pipe fixing component of the present invention can be unfolded for use. After unfolding, it can effectively reduce the overlapping area of ​​the retaining rings on the bracket and increase the effective placement points of the retaining rings, thereby fully adapting to the synchronous fixing requirements of multiple pipes required by the device.

[0020] 3. When the tubing fixing component is not in use, the entire tubing fixing component can be retracted into the groove, effectively reducing the extra space occupied by the equipment. This avoids the problem of medical staff, patients, or family members accidentally bumping into the exposed component when it is not in use, and prevents the tubing fixing component from being damaged. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a front view of the present invention;

[0023] Figure 3 This is the left view of the present invention;

[0024] Figure 4 This is a schematic diagram of the mobile component structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the fixing plate structure of the present invention;

[0026] Figure 6This is an exploded view of the pipe fixing assembly of the present invention;

[0027] Figure 7 This is a schematic diagram of the rotating block structure of the present invention.

[0028] The components include: 1. Operating cabinet; 2. Groove; 3. Moving assembly; 301. Fixed rod; 302. Slide groove; 303. Slider; 304. Lead screw; 305. First drive motor; 306. First connecting rod; 4. Pipeline fixing assembly; 401. Fixing plate; 402. Second drive motor; 403. Rotating shaft; 404. Rotating block; 405. First guide groove; 406. Fixed column; 407. Second connecting rod; 408. Fixed... 409. Fixed block; 410. Second guide groove; 411. Support; 412. Snap ring; 5. Anti-slip elastic pad; 6. First support frame; 7. Lithium battery; 8. Low flow control pump; 9. Drainage tube; 10. Anticoagulation branch tube; 11. Delivery tube; 12. Blood purification device; 13. Return tube; 14. Fixed snap pin; 15. Second support frame; 16. Crossbar; 17. Hanging ring; 18. Controller; 19. Display screen; 20. Movable locking wheel. Detailed Implementation

[0029] The technical solutions in 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.

[0030] Please see the appendix Figure 1 -Appendix Figure 7 The present invention provides a low-flow blood purification and hemodynamic stabilization device for cardiorenal protection, including an operating cabinet 1, a groove 2 inside the operating cabinet 1, a moving component 3 inside the groove 2, and the moving component 3 for driving the pipeline fixing component 4 to move.

[0031] The operating cabinet 1 is the core load-bearing structure of the device, providing installation support for the low-flow control pump 8, blood purification device 12, etc. The groove 2 inside the operating cabinet 1 provides space for the pipeline fixing component 4. When the pipeline fixing component 4 is not in use, it can be retracted into the groove 2, effectively reducing the extra space occupied by the equipment. This avoids the problem of medical staff, patients, or family members accidentally bumping into the exposed components when not in use, and prevents damage to the retaining ring 411. The outer surface of the operating cabinet 1 is coated with a dirt-resistant and antibacterial coating, which is convenient for clinical cleaning and disinfection and reduces the risk of cross-infection. The operating cabinet 1 provides reasonable installation positions for auxiliary components such as the controller 18 and the fixing post 14, ensuring convenient access for medical staff during operation.

[0032] The movable component 3 includes a fixed rod 301, the inner wall of the groove 2 is fixedly connected to the fixed rod 301, the fixed rod 301 is provided with a sliding groove 302, the inner surface of the sliding groove 302 is slidably connected to a slider 303, the inner surface of the slider 303 is threadedly connected to a lead screw 304, the right surface of the fixed rod 301 is fixedly connected to a first drive motor 305, the output end of the first drive motor 305 is fixedly connected to the lead screw 304, the lower surface of the slider 303 is fixedly connected to a first support frame 6 through a first connecting rod 306, and the upper surface of the fixed plate 401 is fixedly connected to the first support frame 6.

[0033] When in use, after the first drive motor 305 is powered on and started, the output end drives the lead screw 304 to rotate around its own axis. The slider 303 is threadedly connected to the lead screw 304 and is limited by the slide groove 302. The rotational motion of the lead screw 304 is converted into the linear motion of the slider 303 along the slide groove 302. The slider 303 drives the first support frame 6 and the pipeline fixing component 4 to move synchronously through the first connecting rod 306, realizing the extension and retraction of the pipeline fixing component 4. When not in use, the pipeline fixing component 4 can be completely retracted into the groove 2 and flush with the surface of the operating cabinet 1, which reduces the space occupation. The forward and reverse rotation of the first drive motor 305 is existing technology.

[0034] A lithium battery 7 is fixedly connected to the upper surface of the fixing plate 401.

[0035] The lithium battery 7 is fixed with a detachable snap-fit ​​structure and establishes a stable electrical connection with the second drive motor 402 through a hidden wire harness. This effectively avoids the external power supply line from being pulled, tangled, or worn during the reciprocating movement of the second drive motor 402 driving the tubing fixation component 4, eliminating potential line faults and ensuring the continuity of power transmission. It provides independent and reliable power support for the movement of the tubing fixation component 4. The capacity of the lithium battery 7 is adapted to the power consumption requirements of the second drive motor 402, supporting continuous operation for 8-12 hours. It is also equipped with a dedicated Type-C charging interface, with a charging time of about 2 hours. When fully charged, it can meet the needs of multiple deployments and retractions of the tubing fixation component 4 in a single day of clinical operation.

[0036] The pipeline fixing assembly 4 includes a fixing plate 401. A second drive motor 402 is fixedly connected to the upper surface of the fixing plate 401. A rotating block 404 is fixedly connected to the output end of the second drive motor 402 via a rotating shaft 403. A first guide groove 405 is provided inside the rotating block 404. A fixing post 406 is provided inside the first guide groove 405. A second connecting rod 407 is fixedly connected to the upper surface of the fixing post 406. A fixing block 408 is fixedly connected to the lower surface of the fixing plate 401. A second guide groove 409 is provided inside the fixing block 408. The inner surface of the second guide groove 409 is slidably connected to the second connecting rod 407. A retaining ring 411 is fixedly connected to the second connecting rod 407 via a bracket 410.

[0037] After the second drive motor 402 starts, it drives the rotating block 404 to rotate via the rotating shaft 403. The first guide groove 405 inside the rotating block 404 rotates synchronously with it. The fixed column 406 is displaced under the constraint of the first guide groove 405, which in turn pushes the second connecting rod 407 to make linear reciprocating motion along the second guide groove 409 inside the fixed block 408. The second connecting rod 407 drives the retaining ring 411 to move synchronously through the bracket 410, realizing the expansion and contraction of the pipeline fixing component 4. In the expanded state, the four ring-shaped brackets 410 drive multiple retaining rings 411 to spread outwards, effectively reducing the overlapping area of ​​the retaining rings 411, increasing the effective placement points, and adapting to the synchronous fixing requirements of multiple pipelines such as the inlet tube 9 and return tube 13. At the same time, the retaining ring 411, as a pipeline positioning component, can be bidirectionally clamped onto the pipeline. Medical staff can complete the pipeline fixing without additional adjustment of the overall direction of the device, greatly improving the installation efficiency.

[0038] The inner surface of the retaining ring 411 is fixedly connected with an anti-slip elastic pad 5. There are multiple retaining rings 411 and four brackets 410 distributed in a ring.

[0039] The anti-slip elastic pad 5 on the inner surface of the clasp 411 is made of medical-grade silicone, which has good elasticity and anti-slip properties. Its Shore hardness has been adjusted so that it can firmly lock the tube through elastic deformation to prevent displacement, without causing narrowing of the lumen due to excessive clamping force. The multiple sets of clasps 411 can avoid the problems of tube entanglement and bending caused by traditional binding, ensuring unobstructed lumen, preventing sudden drops in blood flow velocity and abnormal pressure fluctuations, ensuring stable treatment effects, and making the tubes placed in an orderly manner. The four ring-shaped supports 410 make the distribution of the clasps 411 more even, and can make full use of space after unfolding, avoiding mutual compression of the tubes after fixation, further reducing the risk of tube entanglement. At the same time, the four sets of supports 410 provide medical staff with clear visual guidance to distinguish different functional tubes, improving inspection efficiency.

[0040] The control cabinet 1 is equipped with a low flow control pump 8. A guide tube 9 is fixedly connected to the left surface of the low flow control pump 8. An anticoagulant branch tube 10 is fixedly connected to the side surface of the guide tube 9. The low flow control pump 8 is connected to the blood purification device 12 through the delivery tube 11. The blood purification device 12 forms a blood return path through the return tube 13.

[0041] The low-flow control pump 8 is used to achieve combined cardiorenal protection. Employing precise frequency conversion control technology, the low-flow control pump 8 can be set and maintained at a stable output flow rate via the controller 18, avoiding hemodynamic disturbances caused by flow fluctuations in the blood purification device. One end of the inlet tube 9 is connected to the patient's arterial puncture needle, and the other end is connected to the low-flow control pump 8, used to introduce the patient's blood into the blood purification device 12. The anticoagulant branch tube 10 is connected to the inlet tube 9, used to precisely inject anticoagulant into the blood, preventing blood clotting during low-flow transmission. Its interface uses a leak-proof sealing structure to reduce the risk of anticoagulant leakage. Injecting anticoagulant into the inlet tube 9 via the anticoagulant branch tube 10 is existing technology and well-known to those skilled in the art. The delivery tube 11 delivers the blood output from the low-flow control pump 8 to the blood purification device 12. Within the blood purification device 12, the blood exchanges toxins and electrolytes with the replacement fluid. The purified blood then flows back to the patient's vein through the return tube 13, forming a complete treatment closed loop. The patency of each tube directly affects the treatment effect. The tube fixing component 4 precisely fixes each tube, providing a stable guarantee for the closed-loop treatment.

[0042] The blood purification device 12 is existing technology. Internally, it has an independent blood chamber and a replacement fluid chamber, separated by a semi-permeable membrane with a specific pore size. During operation, blood flows through the blood chamber and the replacement fluid flows through the replacement fluid chamber. Based on the principles of diffusion and convection, metabolic waste products such as urea and creatinine with smaller molecular weights, as well as imbalanced electrolytes such as potassium and sodium, migrate towards the replacement fluid side along the concentration gradient. Meanwhile, the pre-set physiological electrolyte components in the replacement fluid enter the blood in the reverse direction. Simultaneously, the ultrafiltration function of the semi-permeable membrane removes excess water from the blood. The entire process requires no additional special power; efficient purification is achieved solely through the pressure and concentration differences across the membrane. The blood purification device 12 is also equipped with safety modules such as pressure monitoring and bubble detection, which are existing technologies. These safety modules are electrically connected to the controller 18 to ensure a stable and reliable purification process. The operating method of the blood purification device 12 is well known to those skilled in the art. The purified blood is returned to the patient's vein through the return tube 13, forming a complete treatment loop.

[0043] A fixing post 14 is fixedly connected to the left surface of the control cabinet 1. A second support frame 15 is provided inside the fixing post 14. A crossbar 16 is fixedly connected to the upper surface of the second support frame 15. A hanging ring 17 is provided on the crossbar 16.

[0044] The second support frame 15 is made of stainless steel and has good load-bearing capacity, capable of supporting the weight of the crossbar 16 and suspended medical bags and other auxiliary supplies. Multiple hanging rings 17 are provided on the crossbar 16, allowing for flexible selection based on the number of medical bags used. The inner walls of the hanging rings 17 are rounded to prevent wear on the medical bag straps or the bag itself. The tubing fixing assembly 4 is used for the classified fixing of working tubing, while the hanging rings 17 are used to hang medical bags and other auxiliary medical supplies, preventing medical bags from being placed haphazardly and occupying bed space or causing operational interference. This further improves the cleanliness and standardization of the treatment environment and reduces the risk of accidental contact or dropping of medical supplies.

[0045] The control cabinet 1 is equipped with a controller 18, and the controller 18 is equipped with a display screen 19.

[0046] In this application, the first drive motor 305, the second drive motor 402, the lithium battery 7, the low-flow control pump 8, and the display screen 19 are all electrically connected to the controller 18. The controller 18 is equipped with a PLC control system. The main control chip of the controller 18 adopts a high-performance MCU, which can simultaneously handle the speed regulation of the low-flow control pump 8, the motion control of the first drive motor 305 and the second drive motor 402, and the acquisition and analysis of monitoring data such as pressure and flow.

[0047] The display screen 19 features a touch-screen design, allowing medical personnel to directly set the output flow rate of the low-flow control pump 8, start and stop the deployment and retraction of the tubing fixing component 4. Simultaneously, the screen displays real-time parameters such as blood flow rate, tubing pressure, and lithium battery 7 charge. Pressure sensors are installed in the inlet tube 9, delivery tube 11, anticoagulant branch tube 10, and return tube 13. Multiple pressure sensors are electrically connected to the controller 18, enabling real-time collection of pressure data from the corresponding tubing, such as the inlet tube 9, anticoagulant branch tube 10, delivery tube 11, and return tube 13. The signals are transmitted to the PLC control system within the controller 18. The controller 18 processes the data using a high-performance MCU and displays the tubing pressure parameters on the touch-screen display 19 in real-time. The controller 18 also has data storage capabilities, recording key parameters during treatment to provide data support for subsequent diagnostic and treatment analysis, thus enhancing the clinical applicability of the device.

[0048] A movable locking wheel 20 is fixedly connected to the lower surface of the control cabinet 1.

[0049] The movable locking wheels 20 feature a silent omnidirectional wheel design with a rubber-coated surface, resulting in low noise during movement and minimizing disturbance to patients in the ICU. The load-bearing capacity of the movable locking wheels 20 is matched to the total weight of the operating cabinet 1 and all components, ensuring that the wheels will not be damaged during movement. The movable locking wheels 20 allow the device to be easily moved to the bedside.

[0050] Working principle: When using this device, the first drive motor 305 is started to drive the lead screw 304 to rotate. The slider 303 and the first connecting rod 306 on the lead screw 304 move, causing the pipe fixing assembly 4 to move, so that the pipe fixing assembly 4 extends out of the groove 2. After the pipe fixing assembly 4 extends to a suitable position, the operator connects the pipe. Then, the second drive motor 402 is started to drive the rotating shaft 403 and the rotating block 404 to rotate. The rotation of the rotating block 404 causes the fixing column 406 to move in the first guide groove 405, so that the second connecting rod... 407 slides smoothly within the second guide groove 409, thereby driving multiple sets of second connecting rods 407, brackets 410, and retaining rings 411 to unfold simultaneously. The unfolding of retaining rings 411 makes it convenient for operators to install pipelines within the anti-slip elastic pads 5 of retaining rings 411. At the same time, the unfolded retaining rings 411 can reduce the overlapping area of ​​retaining rings 411 on brackets 410, increase the effective placement points of retaining rings 411, and thus fully adapt to the simultaneous fixing requirements of multiple pipelines required by the device. Installing pipelines within the anti-slip elastic pads 5 can ensure that pipelines are placed in an orderly manner.

[0051] When not in use, remove the pipe from the anti-slip elastic pad 5 of the retaining ring 411, start the second drive motor 402 to drive the rotating shaft 403 and the rotating block 404 to rotate in the opposite direction. The rotation of the rotating block 404 drives the fixed column 406 to move in the first guide groove 405, so that the second connecting rod 407 slides in the second guide groove 409. The bracket 410 and the retaining ring 411 retract towards the center. Start the first drive motor 305 to rotate in the opposite direction. The output end of the first drive motor 305 drives the lead screw 304 to rotate. The slider 303 and the first connecting rod 306 on the lead screw 304 move, which drives the pipe fixing assembly 4 to move, so that the pipe fixing assembly 4 extends back into the groove 2, reducing the external space occupied by the pipe fixing assembly 4.

Claims

1. A low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection, comprising an operating cabinet (1), characterized in that, The operating cabinet (1) has a groove (2) inside, and a moving component (3) is provided inside the groove (2). The moving component (3) is used to drive the pipe fixing component (4) to move. The pipe fixing component (4) includes a fixing plate (401). A second drive motor (402) is fixedly connected to the upper surface of the fixing plate (401). The output end of the second drive motor (402) is fixedly connected to a rotating block (404) through a rotating shaft (403). A first guide groove (405) is opened inside the rotating block (404). The interior of the 05) is provided with a fixed column (406), the upper surface of the fixed column (406) is fixedly connected with a second connecting rod (407), the lower surface of the fixed plate (401) is fixedly connected with a fixed block (408), the interior of the fixed block (408) is provided with a second guide groove (409), the inner surface of the second guide groove (409) is slidably connected with the second connecting rod (407), the second connecting rod (407) is fixedly connected with a retaining ring (411) through a bracket (410), and the inner surface of the retaining ring (411) is fixedly connected with an anti-slip elastic pad (5).

2. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 1, characterized in that, The moving component (3) includes a fixed rod (301), the inner wall of the groove (2) is fixedly connected to the fixed rod (301), the fixed rod (301) is provided with a sliding groove (302), the inner surface of the sliding groove (302) is slidably connected to a slider (303), and the inner surface of the slider (303) is threadedly connected to a lead screw (304).

3. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 2, characterized in that, The right surface of the fixed rod (301) is fixedly connected to the first drive motor (305), the output end of the first drive motor (305) is fixedly connected to the lead screw (304), the lower surface of the slider (303) is fixedly connected to the first support frame (6) through the first connecting rod (306), and the upper surface of the fixed plate (401) is fixedly connected to the first support frame (6).

4. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 1, characterized in that, A lithium battery (7) is fixedly connected to the upper surface of the fixing plate (401).

5. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 1, characterized in that, The operating cabinet (1) is equipped with a low flow control pump (8), and a drain tube (9) is fixedly connected to the left surface of the low flow control pump (8), and an anticoagulant branch tube (10) is fixedly connected to the side surface of the drain tube (9).

6. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 5, characterized in that, The low-flow control pump (8) is connected to the blood purification device (12) through the delivery pipe (11), and the blood purification device (12) forms a blood return path through the return blood vessel (13).

7. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 1, characterized in that, The left surface of the operating cabinet (1) is fixedly connected to a fixing post (14), and a second support frame (15) is provided inside the fixing post (14). A crossbar (16) is fixedly connected to the upper surface of the second support frame (15), and a hanging ring (17) is provided on the crossbar (16).

8. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 1, characterized in that, The control cabinet (1) is equipped with a controller (18), and the controller (18) is equipped with a display screen (19).

9. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 1, characterized in that, The number of the retaining rings (411) is multiple, and the number of the brackets (410) is four and arranged in a ring.

10. The low-flow blood purification and hemodynamic stabilization device for combined cardiorenal protection according to claim 1, characterized in that, The lower surface of the operating cabinet (1) is fixedly connected with a movable locking wheel (20).

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