Automatic priming system for dialysis machine

Abstract

The present application relates to an automatic pre-filling system for a dialysis machine, comprising: a balancing chamber unit and a dialysis circulation pipeline; the balancing chamber unit comprises a balancing chamber valve group and a balancing solenoid valve, the dialysis circulation pipeline comprises an arterial clamp, a blood pump, an arterial pot, a dialyzer, a venous pot and a venous clamp arranged in sequence, the arterial pot and the venous pot are respectively provided with a pressure sensor and an air valve; a control unit, the balancing chamber valve group, the balancing solenoid valve, the arterial clamp, the blood pump, the venous clamp, the pressure sensor and the air valve are all electrically connected to the control unit. The utility model can realize the automation of the pre-filling operation, reduce the consumption of dialysate, reduce the workload of medical staff, and can fully and thoroughly remove the gas in the pipeline.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an automatic pre-filling system for a dialysis machine. Background Art

[0002] During the hemodialysis process, priming the dialyzer and blood lines is one of the key steps that medical staff must complete. Before the start of dialysis, medical staff first connect the dialyzer and blood lines and install them on the dialysis machine. One end of the dialyzer is connected to the arterial line and the other end is connected to the venous line. The dialysate line is connected to the inlet and outlet of the dialyzer so that the dialysate flows in the opposite direction to the blood. Then embed the arterial side pump tube section into the blood pump, fix the arterial pot and venous pot, and make sure that the venous end of the dialyzer is facing up. If dialysate is used for priming, the line needs to be connected to the priming outlet.

[0003] Then use physiological saline or dialysate prepared by the dialysis machine for pre-filling to fully expel the air. Medical staff can gently tap the side wall or upper end of the dialyzer, or intermittently clamp the venous line to increase the internal pressure of the dialyzer to expel the gas. At the same time, medical staff are required to manually raise the liquid level of the arteriovenous pot to 3 / 4 height. Finally, fill the dialyzer pipeline with heparin saline and prepare to connect it to the patient's fistula.

[0004] At present, the method of using saline hanging bag for pre-filling is to connect the arterial end of the pipeline to the saline bag, and the venous end to the drainage port of the dialysis machine. The saline is introduced into the dialyzer through the fixed speed rotation of the blood pump, and the air in the dialyzer is discharged to the drainage port through the venous end, thus completing the pre-filling.

[0005] The method of priming with dialysate provided by the dialyzer is to connect the arterial end of the pipe to the priming outlet of the dialyzer, and the venous end to the discharge outlet of the dialyzer. The dialysate is introduced into the dialyzer by rotating the blood pump at a fixed speed, and the air in the dialyzer is discharged to the discharge outlet through the venous end, thus completing the priming.

[0006] Both of the above priming methods require the full attention of medical staff, require repeated insertion and removal of vascular access, consume a large amount of saline or dialysate, and the priming time is relatively long. In addition, bubbles may still exist in the pipeline after priming, which increases the risk of dialysis treatment and the workload of medical staff. Utility Model Content

[0007] The purpose of the present application is to provide an automatic pre-filling system for a dialysis machine, which can realize the automation of the pre-filling operation, reduce the consumption of dialysate, reduce the workload of medical staff, and fully and thoroughly remove the gas in the pipeline.

[0008] In order to achieve the above-mentioned object, the utility model provides an automatic pre-filling system for a dialysis machine, comprising: a balancing chamber unit and a dialysis circulation pipeline;

[0009] The balancing chamber unit includes a balancing chamber valve group and a balancing solenoid valve, the dialysis circulation pipeline includes an arterial clamp, a blood pump, an arterial pot, a dialyzer, a venous pot and a venous clamp which are arranged in sequence, and the arterial pot and the venous pot are respectively provided with a pressure sensor and an air valve;

[0010] The control unit, the balancing chamber valve group, the balancing solenoid valve, the arterial clamp, the blood pump, the venous clamp, the pressure sensor and the air valve are all electrically connected to the control unit.

[0011] In an optional embodiment, the dialysis circulation pipeline includes an arterial pipeline and a venous pipeline, the arterial pipeline and the venous pipeline are respectively connected to two sides of the dialyzer, and a Y-shaped tube is connected between the arterial pipeline and the venous pipeline.

[0012] In an optional embodiment, the arterial line and the venous line are respectively connected to two bifurcated openings of the Y-shaped tube, and the Y-shaped tube includes a drainage opening where two paths intersect.

[0013] In an optional embodiment, the arterial line is connected between the Y-shaped tube and the dialyzer, the arterial clamp, the blood pump and the arterial pot are sequentially arranged on the arterial line, and a pre-filling inlet is connected to the arterial line.

[0014] In an optional embodiment, the pre-filling liquid inlet port is connected to a pre-filling liquid inlet tube, and the pre-filling liquid inlet tube is arranged between the arterial clamp and the blood pump.

[0015] In an optional embodiment, the dialyzer is provided with a dialysate outlet and a dialysate inlet, a dialysate outlet pipe is provided between the dialysate outlet and the balancing chamber unit, a pre-fill outlet is provided on the dialysate outlet pipe, and a short-circuit pipeline is connected between the pre-fill outlet and the pre-fill inlet.

[0016] In an optional embodiment, a dialysate inlet pipe is provided between the dialysate inlet and the balancing chamber unit, and the balancing solenoid valve is provided on the dialysate inlet pipe.

[0017] In an optional embodiment, the venous line is connected between the dialyzer and the Y-shaped tube, and the venous pot and the venous clamp are sequentially arranged on the venous line.

[0018] In an optional embodiment, the pressure sensor includes an arterial pressure sensor and a venous pressure sensor, the arterial pot and the venous pot are respectively connected to an arterial pressure conducting line and a venous pressure conducting line, and the arterial pressure sensor and the venous pressure sensor are respectively installed on the arterial pressure conducting line and the venous pressure conducting line.

[0019] In an optional embodiment, the air valve includes an arterial air valve and a venous air valve, and the root pipeline of the arterial air valve and the root pipeline of the venous air valve are respectively connected to the arterial pressure conducting pipeline and the venous pressure conducting pipeline.

[0020] By electrically connecting the balancing chamber valve group and balancing solenoid valve of the balancing chamber unit, as well as the arterial clamp, blood pump, venous clamp, pressure sensor and air valve in the dialysis circulation pipeline to the control unit, automatic pre-charging of the dialyzer pipeline can be achieved. The control unit can realize the forward and reverse rotation and speed control of the blood pump according to the calculated operating time and different pre-charging stages, and can also control the opening and closing of valves in different pipeline parts in the system, thereby realizing pre-charging of different pipelines.

[0021] By setting different pre-charging speeds and pre-charging total amounts, the pre-charging process can be customized to achieve fine-tuning of the pre-charging effect in different pipelines and scenarios.

[0022] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the automatic pre-filling system of the dialysis machine in this application.

[0025] icon:

[0026] 1-arterial clamp; 2-pre-fill inlet; 3-blood pump; 4-arterial pressure sensor; 5-arterial pot; 6-dialyzer; 7-dialysis fluid outlet; 8-dialysis fluid inlet; 9-venous pressure sensor; 10-venous pot; 11-venous clamp; 12-drain port; 13-venous air valve; 14-arterial air valve; 15-balance chamber; 16-balance solenoid valve; 17-pre-fill outlet. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The automatic pre-filling system for the dialysis machine in the present application is mainly used for pre-filling of the dialysis machine pipelines. Specifically, the automatic pre-filling of the dialysis machine pipelines is achieved by setting the control valve and the opening and closing clamps to electric form, and combining the control valve, the drive device and the opening and closing clamps with the control unit in an electrically connected form.

[0031] See also Figure 1 , the automatic pre-filling system of the dialysis machine in the utility model comprises a balancing chamber unit and a dialysis circulation pipeline;

[0032] The balancing chamber unit includes a balancing chamber valve group and a balancing solenoid valve 16, and the dialysis circulation pipeline includes an arterial clamp 1, a blood pump 3, an arterial pot 5, a dialyzer 6, a venous pot 10 and a venous clamp 11 which are arranged in sequence, and the arterial pot 5 and the venous pot 10 are respectively provided with a pressure sensor and an air valve;

[0033] The control unit, the balancing chamber valve group, the balancing solenoid valve 16, the arterial clamp 1, the blood pump 3, the venous clamp 11, the pressure sensor and the air valve are all electrically connected to the control unit.

[0034] The balancing chamber valve group in the present application specifically includes a plurality of valves in the form of solenoid valves, and the plurality of solenoid valves are installed on the branch pipeline of the balancing chamber unit. Meanwhile, the arterial clamp 1, the venous clamp 11 and the air valve are all in the form of electric valves.

[0035] By sequentially arranging the arterial clamp 1, blood pump 3, arterial pot 5, dialyzer 6, venous pot 10 and venous clamp 11 on the dialysis circulation pipeline, and electrically connecting different electric valves, clamps and blood pump 3 with the control unit, automatic pre-filling of the dialysis machine pipeline can be achieved, which minimizes the consumption of dialysate, reduces the workload of medical staff, and can fully and thoroughly remove the gas in the pipeline.

[0036] Specifically, the dialysis circulation pipeline includes an arterial pipeline and a venous pipeline, which are respectively connected to the two sides of the dialyzer 6, and a Y-shaped tube (the dotted part in the figure) is connected between the arterial pipeline and the venous pipeline, which can form an effective dialysis machine pre-filling pipeline and facilitate the discharge of the pre-filling liquid through the Y-shaped tube.

[0037] At the same time, by connecting the arterial inlet and venous outlet of the blood circulation pipeline through a Y-shaped tube before pre-filling, the blood circulation pipeline is closed to avoid exposure to air, thereby increasing the safety of pre-filling.

[0038] Furthermore, the arterial line and the venous line are respectively connected to two bifurcated openings of the Y-shaped tube, and the Y-shaped tube includes a drainage port 12 where two paths intersect.

[0039] The priming fluid can be physiological saline or a prepared dialysate. Before priming, the venous line at the venous end and the arterial line at the arterial end need to be connected to the upper end of the Y-shaped tube respectively, and the lower end of the Y-shaped tube is connected to the drain port 12.

[0040] The arterial line is connected between the Y-tube and the dialyzer 6 , the arterial clamp 1 , the blood pump 3 and the arterial pot 5 are sequentially arranged on the arterial line, and the arterial line is connected with a pre-filling liquid inlet 2 .

[0041] The pre-filling liquid inlet port 2 is connected to a pre-filling liquid inlet tube, and the pre-filling liquid inlet tube is arranged between the arterial clamp 1 and the blood pump 3 .

[0042] The pre-filling liquid inlet pipe arranged at the upstream front end of the blood pump 3 can connect the pre-filling liquid inlet 2 with the pre-filling liquid outlet 17, and can also connect the pre-filling liquid inlet 2 with the saline outlet. It supports both dialysate and saline, is simple to operate and is compatible with the need for pre-filling with saline.

[0043] The dialyzer 6 is provided with a dialysate outlet 7 and a dialysate inlet 8. A dialysate outlet pipe is provided between the dialysate outlet 7 and the balancing chamber unit. A pre-fill outlet 17 is provided on the dialysate outlet pipe. A short-circuit pipeline (not shown in the figure) is connected between the pre-fill outlet 17 and the pre-fill inlet 2.

[0044] During the specific pre-filling process, the pre-filling outlet 17 and the pre-filling inlet 2 are short-circuited by a short-circuit pipeline, and the dialysate flows out from the pre-filling outlet 17, enters the pipeline through the pre-filling inlet 2, and flows into the pipeline under pressure applied by the rotation of the blood pump 3, flows back to the pipeline after passing through the dialyzer 6, and finally flows out through the drain port 12.

[0045] A dialysate inlet pipe is arranged between the dialysate inlet 8 and the balancing chamber unit, and a balancing solenoid valve 16 is arranged on the dialysate inlet pipe. The setting of the balancing solenoid valve 16 can control the opening and closing of the dialysate inlet pipe, and can adjust the different stages of the pre-filling process, so as to realize the initial low-speed pre-filling and the trans-membrane pre-filling of the balancing chamber unit.

[0046] The venous line is connected between the dialyzer 6 and the Y-tube, and the venous pot 10 and the venous clamp 11 are sequentially arranged on the venous line. The opening and closing of the venous clamp 11 can control the on-off of the venous line and can meet the pre-charging requirements at different stages.

[0047] The pressure sensor includes an arterial pressure sensor 4 and a venous pressure sensor 9. The arterial pot 5 and the venous pot 10 are respectively connected to the arterial pressure conducting pipeline and the venous pressure conducting pipeline. The arterial pressure sensor 4 and the venous pressure sensor 9 are respectively installed on the arterial pressure conducting pipeline and the venous pressure conducting pipeline.

[0048] The air valve comprises an arterial air valve 14 and a venous air valve 13. The root pipeline of the arterial air valve 14 and the root pipeline of the venous air valve 13 are connected to the arterial pressure conducting pipeline and the venous pressure conducting pipeline respectively.

[0049] The automatic priming system of the dialysis machine in the utility model can realize the automation of the priming operation by using the dialysate circulation branch through the forward and reverse rotation of the blood pump 3, coordinating the actions of the arteriovenous clamp 11, the arteriovenous air valve 13, etc., and is divided into several steps of low speed, high speed, impact, transmembrane and raising the liquid level of the arteriovenous pot.

[0050] The priming liquid can be physiological saline or a prepared dialysate. Before priming, the venous end and the arterial end need to be connected to the upper end of the Y-tube respectively, and the lower end of the Y-tube is connected to the drain port 12. Use a pipeline to short-circuit the priming outlet 17 and the priming inlet 2. The dialysate flows out of the priming outlet 17, enters the pipeline through the priming inlet 2, and flows into the pipeline by applying pressure through the rotation of the blood pump 3. After passing through the dialyzer 6, it flows back to the pipeline and finally flows through the drain port 12 for discharge. The specific priming process includes the following:

[0051] 1) Low-speed priming: The blood pump 3 rotates forward at a low speed, clamps the arterial clamp 1, and opens the venous clamp 11; closes the venous air valve 13, closes the arterial air valve 14, and opens the balancing solenoid valve 16; the priming liquid is forwardly filled into the blood circuit, and the rotation is stopped after the set time is reached. The minimum time is the rotation time calculated by the flow rate corresponding to the volume of liquid required to fill the pipeline; the role of this stage is to fill the dialyzer 6 and the pipeline for the first time, and fully remove air and large bubbles;

[0052] 2) Prefilling the arterial pot 5: The blood pump 3 rotates forward at a low speed, clamps the arterial clamp 1, clamps the venous clamp 11, and opens the arterial air valve 14; the liquid level is calculated according to the flow rate and time integral, and an algorithm compensation is performed according to the actual value of the arterial pressure sensor 4. The liquid level control is completed by controlling the rotation time. The expected height is 4 of the height of the arterial pot 5. After completion, the arterial air valve 14 is closed.

[0053] 3) Pre-filling the arterial branch: the blood pump 3 is reversed at a low speed, the arterial clamp 1 is released, and the venous clamp 11 is clamped to pre-fill the pipeline from the front side of the arterial branch to the drainage port 12; after a fixed time, the process ends and the arterial clamp 1 is clamped.

[0054] 4) High-speed priming: The blood pump 3 rotates forward at high speed, clamps the arterial clamp 1, releases the venous clamp 11, and allows the priming liquid to positively fill the blood circuit. The rotation stops after the set time is reached. The minimum time is the rotation time calculated by the flow rate corresponding to the volume of liquid required to fill the pipeline. The function of this stage is to quickly priming the dialyzer 6, fully clean the internal structure of the dialyzer 6, and quickly discharge bubbles.

[0055] 5) Impact priming: The blood pump 3 rotates forward at high speed, clamps the arterial clamp 1, and releases the venous clamp 11, so that the priming liquid positively fills the blood circuit. When the value of the venous pressure sensor 9 is less than 200 mmHg, the venous clamp 11 is clamped to increase the pressure of the blood pipeline. When the value of the venous pressure sensor 9 is greater than 400 mmHg, the venous clamp 11 is opened. The cycle is repeated many times to make the pressure inside and outside the dialyzer 6 change periodically. After the set time is reached, the rotation is stopped. At this stage, the pressure inside the dialyzer 6 changes periodically, which is conducive to removing fine bubbles therein.

[0056] 6) Prefilling the venous pot 10: The blood pump 3 rotates forward at a low speed, clamps the arterial clamp 1, clamps the venous clamp 11, opens the venous air valve 13, calculates the liquid level according to the flow rate and time integral, performs algorithm compensation according to the actual value of the venous pressure sensor 9, and completes the liquid level control by controlling the rotation time. The expected height is 4 of the height of the venous pot 10. After completion, close the venous air valve 13.

[0057] 7) Transmembrane pre-filling: The blood pump 3 rotates forward and the balancing solenoid valve 16 is closed. Due to the working principle of the balancing chamber 15, the left and right flows are balanced. After closing the balancing solenoid valve 16, the pressure difference between the inside and outside of the dialyzer 6 becomes larger, causing the priming liquid to flow across the membrane from the outside to the inside, thereby maintaining the flow balance; after the set time is reached, the blood pump 3 is stopped. The function of this stage is to flush the dialyzer 6 across the membrane to achieve closed circulation and pre-dehydration.

[0058] By setting different pre-charging speeds and pre-charging total amounts, the pre-charging process can be customized to achieve fine-tuning of the pre-charging effect in different pipelines and scenarios.

[0059] Before pre-filling, the arterial inlet and venous outlet of the blood circulation pipeline are first connected to close the blood circulation pipeline to avoid exposure to air, thereby increasing the safety of pre-filling; then the front branch of the blood pump 3 is connected to the pre-filling outlet 17 or the saline outlet, which supports both dialysate and saline, is simple to operate and is compatible with the need for pre-filling with saline.

[0060] During the priming process, the priming process is controlled in sections through several stages including low speed, high speed, impact, transmembrane and rising arteriovenous fluid level. Each stage has different priming objectives and emphases, so that the gas in the entire dialyzer 6 can be discharged more thoroughly.

[0061] The low-speed pre-filling stage is for filling the dialyzer 6 and the pipeline for the first time. The lower speed is more conducive to removing air and large bubbles, so that the dialyzer 6 is fully soaked.

[0062] During the high-speed pre-filling stage, the dialyzer 6 and the pipeline are already filled with liquid. Using a higher speed can increase the pressure in the pipeline and increase the flow rate, so that the bubbles in the dialyzer 6 can be discharged faster.

[0063] The impact priming stage puts the dialyzer 6 in an unused pressure cycle change, which can remove tiny bubbles adsorbed on the fibers and bubbles at the bends in the pipeline.

[0064] The transmembrane pre-filling stage realizes closed circulation and pre-dehydration, so that the liquid outside the dialyzer 6 membrane crosses the membrane to the inside, which can fully clean the fiber bundles inside the dialyzer 6 and improve the transmembrane performance of the dialyzer 6.

[0065] During the stage of liquid level rising in the arteriovenous kettle, when the air valve is opened, the continuous rotation of the blood pump 3 applies a certain pressure, causing the air to be discharged from the air valve end, thereby the liquid level rises. However, due to the compressibility of the gas, the pressure is released rapidly when the air valve is opened, and the liquid level rises very quickly. Therefore, a pressure compensation algorithm is added here, and finally the liquid level can be maintained at 3 / 4 of the height under different pressures, which greatly improves the accuracy of liquid level control.

[0066] The pre-filling system in the utility model can simplify the pre-filling operation. There is no need to constantly knock on the dialyzer 6 during the pre-filling process, and there is no need to manually control the liquid level of the arteriovenous pot. After the pre-filling starts, the medical staff does not need to pay attention to the pre-filling progress, and the medical staff will be prompted to perform the next operation when the pre-filling is completed.

[0067] During the priming process, the reused blood pump 3 is used as the source of the priming liquid driving force, and there is no need to add an independent pump drive. This is applicable to dialysis machines of more different product forms and has better compatibility.

[0068] The liquid level of the arteriovenous pot is raised by automatic program control, and a pressure compensation algorithm is used to ensure that the liquid level remains at the same height under different pressures.

[0069] The priming process is controlled in sections through several stages including low speed, high speed, impact, transmembrane and rising liquid level in arteriovenous pots. The priming objectives and emphases are different in each stage.

[0070] The position of the balancing solenoid valve 16 can control the pressure balance in the pipeline during the pre-filling stage and control the pressure source of the trans-membrane pre-filling by controlling the state of the balancing solenoid valve 16.

[0071] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0072] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dialysis machine automatic pre-filling system, characterized in that: include: Balance chamber unit and dialysis circulation pipeline; The balancing chamber unit includes a balancing chamber valve group and a balancing solenoid valve, the dialysis circulation pipeline includes an arterial clamp, a blood pump, an arterial pot, a dialyzer, a venous pot and a venous clamp which are arranged in sequence, and the arterial pot and the venous pot are respectively provided with a pressure sensor and an air valve; The control unit, the balancing chamber valve group, the balancing solenoid valve, the arterial clamp, the blood pump, the venous clamp, the pressure sensor and the air valve are all electrically connected to the control unit.

2. The automatic priming system for a dialysis machine according to claim 1, characterized in that: The dialysis circulation pipeline includes an arterial pipeline and a venous pipeline, the arterial pipeline and the venous pipeline are respectively connected to the two sides of the dialyzer, and a Y-shaped tube is connected between the arterial pipeline and the venous pipeline.

3. The automatic priming system for a dialysis machine according to claim 2, characterized in that: The arterial pipeline and the venous pipeline are respectively connected to the two bifurcated openings of the Y-shaped tube, and the Y-shaped tube includes a drainage opening where two paths intersect.

4. The automatic priming system for a dialysis machine according to claim 2, characterized in that: The arterial line is connected between the Y-shaped tube and the dialyzer, the arterial clamp, the blood pump and the arterial pot are sequentially arranged on the arterial line, and a pre-filling liquid inlet is connected to the arterial line.

5. The automatic priming system for a dialysis machine according to claim 4, characterized in that: The pre-filling liquid inlet port is connected to a pre-filling liquid inlet tube, and the pre-filling liquid inlet tube is arranged between the arterial clamp and the blood pump.

6. The automatic priming system for a dialysis machine according to claim 4, characterized in that: The dialyzer is provided with a dialysate outlet and a dialysate inlet, a dialysate outlet pipe is provided between the dialysate outlet and the balancing chamber unit, a pre-fill outlet is provided on the dialysate outlet pipe, and a short-circuit pipeline is connected between the pre-fill outlet and the pre-fill inlet.

7. The automatic priming system for a dialysis machine according to claim 6, characterized in that: A dialysate inlet pipe is arranged between the dialysate inlet and the balancing chamber unit, and the balancing solenoid valve is arranged on the dialysate inlet pipe.

8. The automatic priming system for a dialysis machine according to claim 2, characterized in that: The venous line is connected between the dialyzer and the Y-shaped tube, and the venous pot and the venous clamp are sequentially arranged on the venous line.

9. The automatic priming system for a dialysis machine according to claim 1, characterized in that: The pressure sensor includes an arterial pressure sensor and a venous pressure sensor. The arterial pot and the venous pot are respectively connected to an arterial pressure conducting pipeline and a venous pressure conducting pipeline. The arterial pressure sensor and the venous pressure sensor are respectively installed on the arterial pressure conducting pipeline and the venous pressure conducting pipeline.

10. The automatic priming system for a dialysis machine according to claim 9, characterized in that: The air valve comprises an arterial air valve and a venous air valve, and the root pipeline of the arterial air valve and the root pipeline of the venous air valve are respectively connected to the arterial pressure conducting pipeline and the venous pressure conducting pipeline.

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