A hemodialysis system

Abstract

This invention relates to a hemodialysis system, comprising a dialysis pump unit for blood purification and pumping, the dialysis pump unit having a pre-fill state, a blood intake state, a dialysis state, and a blood return state, and having an inlet and an outlet. Before blood purification, the dialysis pump unit is first placed in the pre-fill state, at which time both the inlet and outlet are connected to a pre-fill container storing pre-fill fluid; then, the dialysis pump unit is placed in the blood intake state, at which time the inlet is connected to a dialysis outlet, and the outlet is connected to a waste fluid recovery container; next, the dialysis pump unit is placed in the dialysis state, at which time the inlet is connected to a dialysis outlet, and the outlet is connected to a dialysis inlet; finally, the dialysis pump unit is placed in the blood return state, at which time the inlet is connected to a replacement fluid container containing replacement fluid, and the outlet is connected to a dialysis inlet. The hemodialysis system disclosed in this application can improve the quality of blood pumping.

Description

Technical Field

[0001] This invention relates to the field of hemodialysis equipment technology, and more particularly to a hemodialysis system. Background Technology

[0002] Hemodialysis is a safe, easy, and widely used method of blood purification. It removes various harmful and excess metabolic waste products and excess electrolytes from the body through diffusion, thereby purifying the blood and correcting electrolyte and acid-base imbalances. Hemodialysis equipment is a medical device used to assist the body in achieving hemodialysis. The most basic system of a hemodialysis device consists of a blood pump unit and a blood purification unit, which are used to complete the extracorporeal purification and circulation of blood.

[0003] However, in conventional hemodialysis equipment, after the dialysate guides the pump to deliver blood, the dialysate used to guide the pump often enters the body through the circulation tubing. At this time, the waste products remaining in the dialysate also enter the blood, causing blood contamination. At the same time, at the end of dialysis, due to the pumping principle, some blood often remains in the circulation tubing and cannot be pumped into the body, which easily leads to blood waste.

[0004] In conclusion, improving the quality of blood delivery in the human body is a pressing issue that needs to be addressed in the field of hemodialysis equipment technology. Summary of the Invention

[0005] In order to address the shortcomings of poor blood quality when hemodialysis equipment pumps blood into the human body, this invention proposes a hemodialysis system.

[0006] The technical solution adopted in this invention is a hemodialysis system, including a dialysis pump pressure unit, which has a pre-priming state, a blood intake state, a dialysis state, and a blood return state.

[0007] During the pre-flushing state, both the inlet and outlet of the dialysis pump pressure unit are connected to a pre-flush liquid container.

[0008] When blood is being drawn, the inlet is connected to the dialysis outlet, and the outlet is connected to the waste liquid recovery container.

[0009] During dialysis, the inlet is connected to the dialysis outlet, and the outlet is connected to the dialysis inlet.

[0010] During blood return, the inlet is connected to a replacement fluid container, and the outlet is connected to a dialysis inlet.

[0011] Preferably, the pre-flushing liquid container is located above the dialysis pump pressure unit. The pre-flushing liquid container has a first pre-flushing port and a second pre-flushing port connected to the outlet. The inlet port is connected to the inlet end of a three-way valve, and the first pre-flushing port and the external environment are respectively connected to the two outlet ends of the three-way valve.

[0012] Preferably, the pre-flush state includes both the filling state and the flushing state;

[0013] During the filling process, the inlet is connected to the outside via a three-way valve;

[0014] During flushing, the inlet is connected to the first pre-flushing port via a three-way valve.

[0015] Preferably, the dialysis pump unit includes a dialyzer and a centrifugal pump that are interconnected, and the centrifugal pump is a magnetically levitated centrifugal pump.

[0016] Preferably, the pump outlet of the centrifugal pump is located on the upper side, and the angle formed between the axial direction and the vertical direction of the centrifugal pump is in the range of 0 degrees to 90 degrees.

[0017] Preferably, the dialysis pump pressure unit is connected to a flow monitoring unit, which monitors the flow rate pumped out by the dialysis pump pressure unit in both blood intake and blood return states.

[0018] Preferably, the outlet of the dialysis pump pressure unit is connected to a bubble elimination unit;

[0019] The bubble elimination unit is a dialysis pot, and the dialysis pump pressure unit is connected to the dialysis inlet through the dialysis pot;

[0020] And / or, the bubble elimination unit is a mechanical defoamer, and the dialysis pump pressure unit is connected to the dialysis inlet through the mechanical defoamer.

[0021] Preferably, the inlet is connected to the pre-flushing liquid container, the dialysis outlet and the replacement liquid container via a first multi-position valve, and the outlet is connected to the pre-flushing liquid container, the waste liquid recovery container and the dialysis inlet via a second multi-position valve.

[0022] Preferably, the dialysis pump pressure unit is connected to a temperature control unit for maintaining temperature, and the temperature control unit operates in a pre-charge state.

[0023] Preferably, the pre-filled liquid container is connected to a negative pressure unit for generating negative pressure, and the negative pressure unit operates in the pre-filled state.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This application discloses a hemodialysis system, including a dialysis pump unit for blood purification and pumping. The dialysis pump unit has a pre-fill state, a blood intake state, a dialysis state, and a blood return state. The dialysis pump unit has an inlet and an outlet. Before blood purification, the dialysis pump unit is first placed in the pre-fill state. At this time, both the inlet and outlet are connected to a pre-fill container storing pre-fill fluid. The pre-fill fluid can be injected into the dialysis pump unit, allowing the dialysis pump unit to pump normally. After the pump body is running, air bubbles are removed, thus completing the pre-fill step. Next, the dialysis pump unit is placed in the blood intake state. At this time, the inlet is connected to the dialysis outlet, and the outlet is connected to a waste liquid recovery container. As human blood flows into the dialysis pump unit, the pre-fill fluid remaining in the dialysis pump unit can be collected in the waste liquid recovery container without causing blood loss. Residual pre-flushing fluid can enter the body and contaminate the blood. The dialysis pump unit is then in dialysis mode, with the inlet connected to the dialysis outlet and the outlet connected to the dialysis inlet, thus purifying and dialyzing the blood. Finally, the dialysis pump unit is in return-blood mode, with the inlet connected to a replacement fluid container and the outlet connected to the dialysis inlet. As the replacement fluid flows into the dialysis pump unit, residual blood in the pump unit gradually flows back into the body, preventing blood from remaining in the pump unit and thus avoiding waste. Therefore, this application improves the quality of blood dialysis pumping from multiple angles and perspectives by pre-flushing to remove air bubbles and clean the dialysis pump unit, preventing residual pre-flushing fluid from entering the body and causing blood contamination, and maximizing the return of blood to the body through the return-blood mode.

[0026] Compared with the prior art, the hemodialysis system disclosed in this application can improve the quality of blood pumping when pumping human blood. Attached Figure Description

[0027] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein:

[0028] Figure 1 A schematic diagram of the structure of a hemodialysis system provided according to an embodiment of the present invention is shown;

[0029] Figure 2 It shows that according to Figure 1 A partially sectional front view of an ion pump and mounting components in a hemodialysis system is provided.

[0030] Figure 3 It shows that according to Figure 2 A top view of an ion pump and mounting components in a hemodialysis system is provided.

[0031] Label Explanation:

[0032] 10. Dialysis pump pressure unit; 11. Centrifugal pump; 12. Dialyzer; 13. Inlet; 14. Outlet;

[0033] 20. Pre-flushing liquid container; 21. First pre-flushing port; 22. Second pre-flushing port; 23. Three-way valve;

[0034] 30. Waste liquid recovery container;

[0035] 40. Replace the liquid container;

[0036] 50. Mounting assembly; 51. Pump mounting base; 52. Base; 53. Pump mounting seat; 54. First fastening handwheel; 55. Second fastening handwheel; 56. Bolt. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] This invention discloses a hemodialysis system; please refer to [reference needed]. Figure 1 It includes a dialysis pump pressure unit 10, which has a pre-flush state, a blood intake state, a dialysis state, and a blood return state.

[0039] During the pre-flushing state, both the inlet 13 and outlet 14 of the dialysis pump pressure unit 10 are connected to the pre-flushing liquid container 20.

[0040] When blood is being drawn, the inlet 13 is connected to the dialysis outlet, and the outlet 14 is connected to the waste liquid recovery container 30.

[0041] During dialysis, the inlet 13 is connected to the dialysis outlet, and the outlet 14 is connected to the dialysis inlet.

[0042] In the blood return state, the inlet 13 is connected to the replacement fluid container 40, and the outlet 14 is connected to the dialysis inlet.

[0043] The dialysis pump unit 10 has pre-filling, blood intake, dialysis, and blood return states. The dialysis pump unit 10 has an inlet 13 and an outlet 14. Before blood purification, the dialysis pump unit 10 is first placed in the pre-filling state. At this time, both the inlet 13 and outlet 14 are connected to a pre-filling fluid container 20, which stores pre-filling fluid. The pre-filling fluid can be injected into the dialysis pump unit 10, allowing it to pump normally and remove air bubbles, thus completing the pre-filling step. Next, the dialysis pump unit 10 is placed in the blood intake state. At this time, the inlet 13 is connected to the dialysis outlet, and the outlet 14 is connected to a waste fluid recovery container 30. As blood flows into the dialysis pump unit 10, the remaining pre-filling fluid in the dialysis pump unit 10 can be collected in the waste fluid recovery container 30. This prevents residual pre-flushing fluid from entering the body and contaminating the blood. The dialysis pump unit 10 is then in dialysis mode, with the inlet 13 connected to the dialysis outlet and the outlet 14 connected to the dialysis inlet, thus purifying and dialyzing the blood. Finally, the dialysis pump unit 10 is in return-blood mode, with the inlet 13 connected to a replacement fluid container 40 and the outlet 14 connected to the dialysis inlet. As the replacement fluid flows into the dialysis pump unit 10, residual blood in the dialysis pump unit 10 gradually flows back into the body, preventing blood from remaining in the dialysis pump unit 10 and thus avoiding waste. Therefore, this application improves the pumping quality of human hemodialysis from multiple angles and perspectives by pre-flushing to remove air bubbles and clean the dialysis pump unit 10, preventing residual pre-flushing fluid from entering the body and contaminating the blood through the blood-drawing mode, and maximizing the return of human blood to the body through the return-blood mode. Compared with the prior art, the hemodialysis system disclosed in this application can improve the quality of blood pumping when pumping human blood.

[0044] Specifically, both the inlet 13 and the outlet 14 are connected to the pre-flushing container 20. This arrangement, which puts the dialysis pump unit 10 in a pre-flushing state, serves the following purposes: first, to introduce pre-flushing liquid into the dialysis pump unit 10 so that the pump body can operate normally; second, to eliminate air bubbles in the dialysis pump unit 10, preventing residual air bubbles from entering the human body and causing blood embolism; and third, to eliminate dust and contaminants present in the dialysis pump unit 10, preventing contamination of the blood of the person requiring dialysis.

[0045] The inlet 13 is connected to the dialysis outlet, and the outlet 14 is connected to the waste liquid recovery container 30. This arrangement, which puts the dialysis pump unit 10 in a blood-drawing state, serves two purposes: first, to prevent any remaining pre-flushing fluid in the dialysis pump unit 10 from entering the human body and causing contamination; second, during the pre-flushing process, the flow rate of the pre-flushing fluid between the dialysis pump unit 10 and the pre-flushing fluid container 20 is adjusted according to the pre-flushing time, meaning the flow rate of the pre-flushing fluid is different from the flow rate of the subsequent dialysis blood. Therefore, the waste liquid recovery container 30 adds a buffer time between the two stages, preventing the generation of air bubbles caused by uneven flow rates in the dialysis pump unit 10, and ensuring that the blood is purified within the rated purification capacity of the dialyzer 12 of the dialysis pump unit 10, thereby improving purification efficiency.

[0046] The inlet 13 is connected to a replacement fluid container 40, and the outlet 14 is connected to a dialysis inlet. This arrangement, which keeps the dialysis pump unit 10 in a blood return state, serves two purposes: First, it prevents the dialysis pump unit 10 from retaining some purified dialysis blood that has not returned to the body, thus avoiding blood waste. Second, when blood remains in the dialysis pump unit 10, medical staff often infuse the residual blood into a sealing strip for processing. During this process, the exposure risk to medical staff increases dramatically. If the blood remains in the dialysis pump unit 10 for too long, it will coagulate and cause blockage, making it even more difficult to clean. The replacement fluid container 40 in this application reduces the exposure risk to medical staff and lowers the difficulty of cleaning the dialysis pump unit 10.

[0047] In some embodiments, please refer to Figures 1 to 3 The pre-flushing container 20 is located above the dialysis pump pressure unit 10. The pre-flushing container 20 has a first pre-flushing port 21 and a second pre-flushing port 22 connected to the outlet port 14. The inlet port 13 is connected to the inlet end of the three-way valve 23. The first pre-flushing port 21 and the external environment are respectively connected to the two outlet ends of the three-way valve 23.

[0048] Specifically, during the pre-filling phase, since the pre-filling fluid container 20 is located above the dialysis pump pressure unit 10, when the inlet 13 is connected to the external environment, the pre-filling fluid in the pre-filling fluid container 20 can be poured into the dialysis pump pressure unit 10 under the action of gravity. Air within the dialysis pump pressure unit 10 can be easily expelled until the pre-filling fluid reaches the position of the three-way valve 23. At this point, the inlet 13 is connected to the first pre-filling port 21, and the air between the three-way valve 23 and the pre-filling fluid container 20 will also rise and be expelled. This method utilizes gravity to infuse the dialysis pump pressure unit 10, eliminating the need to invert the dialyzer 12 within the dialysis pump pressure unit 10, thus facilitating dialysis work for medical personnel. Furthermore, the gravity-based infusion method is relatively slow, resulting in better air bubble removal.

[0049] In some specific embodiments, the pre-flush state includes an injection state and a flushing state;

[0050] During the filling process, the inlet 13 is connected to the outside via the three-way valve 23;

[0051] During the flushing process, the liquid inlet 13 is connected to the first pre-flushing port 21 via the three-way valve 23.

[0052] It should be noted that the normal liquid flow direction of the dialysis pump pressure unit 10 is that the liquid flows into the dialysis pump pressure unit 10 from the inlet 13 and then flows out of the pump pressure unit from the outlet 14. The pre-flushing state includes the filling state and the flushing state. In the two states, the pre-flushing liquid flows in opposite directions. For air bubbles that cannot be properly removed in one direction, the removal effect is better by removing them in the other direction, thus achieving a better removal effect of air bubbles and a better cleaning effect of contaminants.

[0053] In some more specific embodiments, the dialysis pump pressure unit 10 is connected to a peristaltic pump, which can accelerate the perfusion and pre-flush speed of the system.

[0054] In some embodiments, the dialysis pump unit 10 includes a dialyzer 12 and a centrifugal pump 11 that are interconnected, and the centrifugal pump 11 is a magnetically levitated centrifugal pump 11.

[0055] Specifically, in order to improve the quality of blood pumping, this application selects a frictionless and lower-heating magnetic levitation centrifugal pump 11 to pump blood, taking into account the characteristics of blood pumping. At the same time, the magnetic levitation centrifugal pump 11 has a smaller destructive effect on blood cells. Therefore, the selection of the magnetic levitation centrifugal pump 11 can minimize the influence of temperature and avoid damage to blood cells.

[0056] Please refer to the following: Figure 2 and Figure 3Centrifugal pump 11 is mounted on a frame via mounting assembly 50. Centrifugal pump 11 can be retracted into the frame via mounting assembly 50, or suspended outside the frame via mounting assembly 50. Mounting assembly 50 includes a base 52, a pump mounting base 51, a pump mounting seat 53, bolts 56, a first fastening handwheel 54, and a second fastening handwheel 55. The base 52 is connected to the frame. The pump mounting base 51 is hinged to the base 52. The first fastening handwheel 54 is threaded to the pump mounting base 51, and adjusting the first fastening handwheel 54 prevents the pump mounting base 51 from moving relative to the base 52 or the frame. The second fastening handwheel 55 is threaded to the pump mounting base 51, and adjusting the second fastening handwheel 55 prevents the pump mounting seat 53 from moving relative to the pump mounting base 51. Bolts 56 pass through the pump mounting seat 53, mounting the centrifugal pump 11 onto the pump mounting seat 53. In other embodiments, a universal arm can be used as mounting assembly 50.

[0057] In some specific embodiments, the centrifugal pump 11 is located below the dialyzer 12, thereby enabling the centrifugal pump 11 to provide sufficient power to the device above.

[0058] In some specific embodiments, the pump outlet of the centrifugal pump 11 is located on the upper side, and the angle formed between the axial direction and the vertical direction of the centrifugal pump 11 ranges from 0 degrees to 90 degrees.

[0059] In order to enable the centrifugal pump 11 to operate better and pump a stable flow rate, the pump outlet of the centrifugal pump 11 is set on the upper side of the pump, so that the centrifugal pump 11 does not have a large attitude deviation in the vertical direction, and the angle formed between the axis of the centrifugal pump 11 and the vertical direction is within the range of 0 degrees to 90 degrees.

[0060] In some embodiments, the dialysis pump pressure unit 10 is connected to a flow monitoring unit, which monitors the flow rate pumped out by the dialysis pump pressure unit 10 in the blood extraction state and the blood return state.

[0061] It should be noted that, in order to enable the hemodialysis system to accurately collect the discharged pre-rinse fluid and input accurate replacement fluid, this application also includes a flow monitoring unit. The flow monitoring unit can monitor the flow rate of the liquid pumped by the dialysis pump pressure unit 10, thereby correctly determining the duration of the blood draw and blood return states, so as to obtain higher quality blood pumping.

[0062] In some embodiments, the outlet 14 of the dialysis pump pressure unit 10 is connected to a bubble elimination unit;

[0063] The bubble elimination unit is a dialysis pot, and the dialysis pump pressure unit 10 is connected to the dialysis inlet through the dialysis pot;

[0064] And / or, the bubble elimination unit is a mechanical defoamer, and the dialysis pump pressure unit 10 is connected to the dialysis inlet through the mechanical defoamer.

[0065] The bubble elimination unit is mainly used to eliminate bubbles. It can be achieved by a dialysis pot or a mechanical defoamer, preferably a dialysis pot, so as not to damage the blood cells in the blood. Specifically, one can be installed at the dialysis outlet and one at the dialysis inlet.

[0066] In some embodiments, the inlet 13 is connected to the pre-flushing container 20, the dialysis outlet and the replacement fluid container 40 via a first multi-position valve, and the outlet 14 is connected to the pre-flushing container 20, the waste fluid recovery container 30 and the dialysis inlet via a second multi-position valve.

[0067] Specifically, in order to avoid air bubbles that are easily generated during manual switching and contamination of the external environment, the hemodialysis system disclosed in this application uses a first multi-position valve to electrically switch the priming fluid container 20, the dialysis outlet and the replacement fluid container 40, and uses a second multi-position valve to electrically switch the priming fluid container 20, the waste fluid recovery container 30 and the dialysis inlet.

[0068] In some embodiments, the dialysis pump pressure unit 10 is connected to a temperature control unit for maintaining temperature, and the temperature control unit operates in a pre-charge state.

[0069] It should be noted that, in order to cope with dialysis environments with varying temperatures and to prevent external temperatures from affecting the normal blood temperature, a temperature control unit is installed to preheat the blood before hemodialysis, preventing the blood circulating outside the body from being cooled by excessively cold tubing. On the other hand, maintaining the temperature during the pre-priming phase can prevent the formation of air bubbles that are easily caused during the pre-priming phase and when entering the blood drawing phase due to uneven temperature.

[0070] In other embodiments, the temperature control unit operates not only in the pre-charge state, but also in the blood evacuation state, dialysis state, and blood evacuation state, thereby maintaining the temperature throughout the entire hemodialysis system process to prevent the blood from becoming too hot or too cold, which could affect the quality of blood pumping. Furthermore, the downstream pipeline of the temperature control unit is covered with insulation material to prevent further temperature changes as the blood passes through the pipeline.

[0071] In some embodiments, the pre-fill container 20 is connected to a negative pressure unit for generating negative pressure, the negative pressure unit operating in a pre-fill state.

[0072] Specifically, the negative pressure unit connected to the pre-flushing liquid container 20 operates in the pre-flushing state. By reducing the pressure, the bubbles expand and burst in the pre-flushing liquid. For some structural locations in the dialysis pump pressure that are difficult to remove bubbles, the negative pressure unit can easily eliminate the bubbles at these locations.

[0073] In the description of this specification, the use of terms such as "Embodiment 1," "this embodiment," or "in one embodiment" indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in one or more embodiments or examples.

[0074] In the description of this specification, the terms "connection," "installation," "fixing," "setting," and "having" are interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0075] In the description of this specification, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0076] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this invention. Those skilled in the art can easily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this invention is not limited to the above embodiments. Modifications in the following situations should be within the scope of protection of this invention: ① New technical solutions implemented based on the technical solution of this invention and combined with existing common knowledge, where the technical effects of the new technical solution do not exceed the technical effects of this invention; ② Equivalent substitutions of some features of the technical solution of this invention using known technology, resulting in the same technical effects as those of this invention; ③ Extendable technical solutions based on the technical solution of this invention, where the substantive content of the extended technical solution does not exceed the technical solution of this invention; ④ Equivalent transformations made using the content of this specification and drawings, directly or indirectly applied to other related technical fields.

Claims

1. A hemodialysis system, characterized in that, It includes a dialysis pump pressure unit, which has a pre-priming state, a blood intake state, a dialysis state, and a blood return state; During the pre-flushing state, both the inlet and outlet of the dialysis pump pressure unit are connected to a pre-flushing liquid container; In the blood-drawing state, the inlet is connected to the dialysis outlet, and the outlet is connected to the waste liquid recovery container. During the dialysis process, the inlet is connected to the dialysis outlet, and the outlet is connected to the dialysis inlet. In the blood return state, the inlet is connected to a replacement fluid container, and the outlet is connected to the dialysis inlet; The pre-flushing fluid container is located above the dialysis pump pressure unit. The pre-flushing fluid container has a first pre-flushing port and a second pre-flushing port connected to the outlet. The inlet port is connected to the inlet end of a three-way valve. The first pre-flushing port and the external environment are respectively connected to the two outlet ends of the three-way valve. The pre-flush state includes the injection state and the flushing state; During the infusion state, the inlet is connected to the outside through the three-way valve, and gravity is used to infuse the dialysis pump pressure unit. In the rinsing state, the inlet is connected to the first pre-rinsing port through the three-way valve. In the rinsing state, the flow direction of the pre-rinsing liquid is opposite to that in the filling state. The dialysis pump unit includes a dialyzer and a centrifugal pump that are interconnected, and the centrifugal pump is a magnetically levitated centrifugal pump.

2. The hemodialysis system according to claim 1, characterized in that, The pump outlet of the centrifugal pump is located on the upper side, and the angle formed between the axial direction and the vertical direction of the centrifugal pump ranges from 0 degrees to 90 degrees.

3. A hemodialysis system according to any one of claims 1 to 2, characterized in that, The dialysis pump pressure unit is connected to a flow monitoring unit, which monitors the flow rate pumped out by the dialysis pump pressure unit in the blood extraction state and the blood return state.

4. A hemodialysis system according to any one of claims 1 to 2, characterized in that, The outlet of the dialysis pump pressure unit is connected to a bubble elimination unit; The bubble elimination unit is a dialysis pot, and the dialysis pump unit is connected to the dialysis pot and the dialysis inlet. And / or, the bubble elimination unit is a mechanical defoamer, and the dialysis pump pressure unit is connected to the dialysis inlet through the mechanical defoamer.

5. A hemodialysis system according to any one of claims 1 to 2, characterized in that, The inlet is connected to the pre-flushing liquid container, the dialysis outlet and the replacement liquid container via a first multi-position valve, and the outlet is connected to the pre-flushing liquid container, the waste liquid recovery container and the dialysis inlet via a second multi-position valve.

6. A hemodialysis system according to any one of claims 1 to 2, characterized in that, The dialysis pump pressure unit is connected to a temperature control unit for maintaining temperature, and the temperature control unit operates in the pre-charge state.

7. A hemodialysis system according to any one of claims 1 to 2, characterized in that, The pre-filled liquid container is connected to a negative pressure unit for generating negative pressure, and the negative pressure unit operates in the pre-filled state.

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