CN114129799B - Blood purification system - Google Patents

Abstract

The present application discloses a blood purification system, which includes: a liquid level detector, which is arranged on the intravenous pot, and when the liquid level detector detects that the liquid level of the intravenous pot reaches the first preset liquid level, it sends a liquid level prompt signal; a liquid level increase module, which is used to increase the liquid level of the intravenous pot according to the first trigger operation of the user detected; a start module, which is used to control the blood purifier to perform blood purification according to the blood treatment mode; a first fault detection module, which is used to record the first time length of the liquid level increase module being continuously triggered when the liquid level detector sends the liquid level prompt signal, and send a liquid level fault signal when the first time length is greater than or equal to the first preset time length. In this way, the liquid level of the intravenous pot can be flexibly controlled and the liquid level safety can be guaranteed in the case of setting a liquid level detector.

Description

Blood purification system

Technical Field

The present application relates to the technical field of blood purification, and in particular to a blood purification system.

Background technique

In the blood purification process, the intravenous bottle plays an extremely important role in the blood purification system. Traditional technology usually uses two liquid level detectors to detect whether the liquid level in the intravenous bottle reaches the maximum liquid level warning value and the minimum liquid level warning value respectively, so as to monitor whether the liquid level in the intravenous bottle is within the normal range.

However, the liquid level monitoring method in traditional technology has the following two obvious defects:

First, setting up two liquid level detectors increases the overall manufacturing cost, the overall operating cost, and increases the difficulty of the overall structure and layout; second, setting a fixed maximum liquid level warning value reduces the flexibility of liquid level control, brings great inconvenience to the blood purification control process, and even endangers the safety of the blood purification process.

Summary of the invention

Based on this, the present application provides a blood purification system that can flexibly control the liquid level of an intravenous bottle and ensure liquid level safety by setting a liquid level detector.

In a first aspect, the present application provides a blood purification system, the blood purification system comprising a blood circuit, a blood purifier, and a venous kettle, the blood purification system further comprising:

a liquid level detector, arranged on the intravenous pot, and sending a liquid level prompt signal when the liquid level detector detects that the liquid level of the intravenous pot reaches the first preset liquid level;

A liquid level increasing module, used for increasing the liquid level of the intravenous kettle according to a detected first trigger operation of the user;

A start module, used for controlling the blood purifier to perform blood purification according to a blood treatment mode;

The first fault detection module is used to record the first time length of the liquid level adjustment module being continuously triggered when the liquid level detector sends out the liquid level prompt signal, and send out a liquid level fault signal when the first time length is greater than or equal to a first preset time length.

The blood purification system of the embodiment of the present application is only provided with a liquid level detector corresponding to the first preset liquid level. The first preset liquid level can be equivalent to a liquid level warning value, which can greatly simplify the liquid level detection and control process of the intravenous kettle, and is conducive to reducing the spatial structure volume of the blood purification equipment. On this basis, the liquid level can be raised according to the user's first trigger operation of the liquid level increase. When the liquid level is raised during the blood purification process, for the sake of liquid level safety, the liquid level above the first preset liquid level needs to be controlled. The control is controlled by the continuous adjustment time when the liquid level is raised. Therefore, when the liquid level detector detects the first preset liquid level and sends a liquid level prompt signal, it starts to record the first time length of the liquid level increase module being continuously triggered. The first time length can be equivalent to the continuous adjustment time. When the first time length is greater than or equal to the first preset time length, a liquid level fault signal is sent. By limiting the time for continuous increase of the liquid level, it is possible to prevent the user from accidentally triggering the device or the device itself from making errors that would cause the intravenous bottle to be filled with liquid, thereby ensuring the safety of the liquid level in the intravenous bottle. More importantly, this method gives medical staff greater operational flexibility. Medical staff can adjust the liquid level in the intravenous bottle to a certain safe level according to clinical treatment needs, which can improve the patient's blood purification treatment effect and efficiency. On the basis of ensuring the liquid level safety of the intravenous bottle, it gives medical staff greater freedom to control the liquid level.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the basic principle of hemodialysis in the blood purification system of the present application;

FIG2 is a schematic diagram of the appearance structure of a blood purification device in the blood purification system of the present application;

FIG3 is a schematic diagram of the basic principle of the blood purification system of the present application;

FIG4 is a basic schematic diagram of a venous kettle in the blood purification system of the present application;

FIG5 is a schematic structural diagram of an embodiment of a blood purification system of the present application.

Description of main components and symbols:

1. Arterial line; 2. Venous line; 3. Arterial clamp; 4. Venous clamp; 5. Peristaltic pump; 6. Heparin pump; 7. Liquid level detector; 8. Venous pot; 81. Pot body; 82. Inlet end; 83. Fluid infusion end; 84. Gas adjustment end; 85. Outlet end; 9. Heater; 10. Bubble detector; 11. Blood detector; 12. Filter; 13. Blood leakage detector; 14. Filtration pump; 15. Dialysate pump; 16. Balance; 17. Blood purifier; 18. Fluid infusion tube; 19. Branch tube; 20. Filter; 21. First three-way valve; 22. Second three-way valve; 23. Pressure sensor; 24. Trachea; 25. Air pump; 26. Liquid inlet pipe; 27. Liquid outlet pipe; 100. Liquid level increase module; 200. Start module; 300. First fault detection module.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations/steps, nor must they be executed in the order described. For example, some operations/steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

Before introducing the blood purification system of the embodiment of the present application in detail, the relevant technical content is first introduced.

Blood purification refers to the process of drawing the patient's blood out of the body and passing it through a blood purification device to remove certain pathogenic substances in it, in order to purify the blood and treat the disease. According to the specific working principle of blood purification treatment, blood treatment modes include: hemodialysis treatment mode, hemofiltration treatment mode, hemoperfusion treatment mode, plasma exchange treatment mode, immunoadsorption treatment mode, etc.; different blood treatment modes can be applied to the treatment of different types of diseases. Taking hemodialysis as an example, the working principle of hemodialysis is: using the principle of semipermeable membrane, through diffusion, ultrafiltration, adsorption and convection, to exchange substances, so as to remove various harmful and excess metabolic wastes and excess electrolytes from the body, so as to purify the blood and correct the water electrolyte and acid-base balance. Among them, hemodialysis is widely used in the clinical treatment of patients with renal failure.

In the clinical treatment process, it is necessary to automatically control the patient's blood purification treatment process through blood purification equipment. Taking hemodialysis as an example, FIG1 shows a basic principle diagram of hemodialysis, and its components include: arterial line 1, venous line 2, arterial clamp 3, venous clamp 4, peristaltic pump 5, heparin pump 6, liquid level detector 7, venous pot 8, heater 9, bubble detector 10, blood detector 11, filter 12, blood leakage detector 13, filtration pump 14, dialysate pump 15, balance 16. As shown in FIG1 , the blood of the human body is led out to the filter 12 through the arterial line 1, and at the same time, the dialysate supply system uses the dialysis concentrate and the dialysis water to prepare the qualified dialysate, and outputs the dialysate to the filter 12; there is a semipermeable membrane in the filter 12, wherein the blood and the dialysate are respectively located on both sides of the semipermeable membrane, and the blood and the dialysate exchange substances in the filter 12 by means of the contact of the semipermeable membrane and the concentration gradient, so as to achieve the blood purification effect; then the venous line 2 outputs the purified blood to the venous pot 8, and the venous pot 8 is used to buffer the blood in the line and remove the blood bubbles in the line; then the purified blood is returned to the human body through the venous line 2.

In the blood purification process, the intravenous kettle plays an extremely important role in the blood purification system. A certain volume of blood is stored in the intravenous kettle to intercept the residual air in the pipeline, etc. The liquid level in the intravenous kettle can reflect the actual state of the patient's blood purification. When the patient's blood purification process is in a normal state, the liquid level in the intravenous kettle needs to be maintained in a normal state. By detecting and monitoring the liquid level of the intravenous kettle, the liquid level of the blood in the intravenous kettle can be prevented from being in a fault state. When the traditional technology monitors the liquid level in the intravenous kettle, two liquid level detectors are usually used to detect whether the liquid level in the intravenous kettle reaches the maximum liquid level warning value and the minimum liquid level warning value, so as to monitor whether the liquid level in the intravenous kettle is in the normal range. For example, when it is detected that the liquid level in the intravenous kettle reaches the maximum liquid level warning value, the patient's blood purification process is immediately interrupted.

However, the liquid level monitoring method of the intravenous bottle in the traditional technology has the following two obvious defects:

1. Two liquid level detectors are set on the intravenous kettle, which increases the overall manufacturing cost and the overall operating cost of the blood purification equipment, resulting in a larger overall structure of the blood purification equipment, which is not conducive to the overall placement convenience of the components on the blood purification equipment and makes the layout of electronic components more difficult.

2. Two liquid level detectors are set on the intravenous pot, and a fixed maximum liquid level warning value and a fixed minimum liquid level warning value are set. Both of them need to be set in advance before the blood purification begins and cannot be changed. However, in actual applications, the liquid level of the intravenous pot will be affected by many factors, such as the patient's physique, the selected blood treatment mode, the flow rate of the liquid level in the pipeline, etc., so medical staff need to adjust the liquid level of the blood in the intravenous pot at any time according to the actual situation, and it is difficult to find a standard liquid level warning value. Especially for the maximum liquid level warning value, if the maximum liquid level warning value is set too high, the blood in the intravenous pot is easy to overflow. If the maximum liquid level warning value is set too low, the liquid level of the blood in the intravenous pot is easy to reach the maximum liquid level warning value, resulting in false alarms, affecting the patient's blood purification treatment efficiency and blood purification treatment effect. Therefore, setting a fixed maximum liquid level warning value uniformly will limit the medical staff's control of the liquid level, reduce the medical staff's flexible control of the liquid level, bring great inconvenience to the blood purification control process, and even endanger the safety of the patient's blood purification process.

The blood purification system of the embodiment of the present application is only provided with a liquid level detector corresponding to the first preset liquid level. The first preset liquid level can be equivalent to a liquid level warning value, which can greatly simplify the liquid level detection and control process of the intravenous kettle, and is conducive to reducing the spatial structure volume of the blood purification equipment. On this basis, the liquid level can be raised according to the user's first trigger operation of the liquid level increase. When the liquid level is raised during the blood purification process, for the sake of liquid level safety, the liquid level above the first preset liquid level needs to be controlled. The control is controlled by the continuous adjustment time when the liquid level is raised. Therefore, when the liquid level detector detects the first preset liquid level and sends a liquid level prompt signal, it starts to record the first time length of the liquid level increase module being continuously triggered. The first time length can be equivalent to the continuous adjustment time. When the first time length is greater than or equal to the first preset time length, a liquid level fault signal is sent. By limiting the time for continuous increase of the liquid level, it is possible to prevent the user from accidentally triggering the device or the device itself from making errors that would cause the intravenous bottle to be filled with liquid, thereby ensuring the safety of the liquid level in the intravenous bottle. More importantly, this method gives medical staff greater operational flexibility. Medical staff can adjust the liquid level in the intravenous bottle to a certain safe level according to clinical treatment needs, which can improve the patient's blood purification treatment effect and efficiency. On the basis of ensuring the liquid level safety of the intravenous bottle, it gives medical staff greater freedom to control the liquid level.

The blood purification system in the embodiment of the present application includes a blood purification device. Figure 2 shows a schematic diagram of the appearance structure of an embodiment of the blood purification device. The blood purification device includes: a main body and a display screen, wherein various components such as a blood circuit, a blood purifier, and an intravenous pot are integrated on the main body, and relevant information about blood purification can be displayed through the display screen.

In order to better illustrate the principle of blood purification, FIG3 shows a basic schematic diagram of a blood purification system, wherein the blood purification system comprises: a peristaltic pump 5, a blood circuit (an arterial line 1 and a venous line 2), a blood purifier 17 and a venous pot 8, and may further comprise: an arterial clamp 3, a venous clamp 4, a heparin pump 6, a liquid level detector 7, a heater 9, a bubble detector 10, and a blood detector 11; the blood circuit is used to transmit liquid; wherein the blood circuit comprises: an arterial line 1 and a venous line 2, wherein the middle portion of the arterial line 1 passes through the peristaltic pump 5, one end of the arterial line 1 is connected to the blood inlet end of the blood purifier 17, and the venous line 2 passes through the peristaltic pump 5, One end of the pipeline 2 is connected to the blood outlet end of the blood purifier 17, and the venous pot 8 is arranged in the venous pipeline 2; wherein the peristaltic pump 5 is used to provide driving force to the arterial pipeline 1, so that the arterial pipeline 1 transfers the liquid to the blood purifier 17, and then the liquid in the blood purifier 17 is led out through the venous pipeline 2; for example, in a specific blood purification treatment process, the blood in the patient's body is led out through the arterial pipeline 1 and output to the blood purifier 17. After purification treatment by the blood purifier 17, the purified blood is re-introduced into the patient's body through the venous pipeline 2 to realize the patient's blood purification function.

It should be noted that the blood purification system can be applied to various blood treatment modes of patients, such as blood perfusion treatment mode, hemodialysis treatment mode, plasma exchange treatment mode, blood filtration treatment mode, etc. Although different blood purification treatment modes have different pipeline schematics, the pipeline schematics of various blood purification treatment modes are expanded on the basis of Figure 3. Therefore, this article mainly discusses in detail based on Figure 3. The blood purification principles of this blood purification system are universal in various blood purification treatment modes.

As shown in FIG3 , the intravenous pot 8 is an essential electronic component in the basic schematic diagram of the blood purification system. During the blood purification treatment, the intravenous pot 8 is used to concentrate blood, and medical staff can also conveniently perform blood observation, testing, and drug addition operations on the intravenous pot 8. Specifically, please refer to FIG4 , the intravenous pot 8 includes: a pot body 81; an inlet end 82 and a gas regulating end 84 are arranged above the pot body 81, and an outlet end 85 is arranged below the pot body 81, wherein the venous pipeline 2 includes: a liquid inlet pipe 26, a branch pipe 19, and a liquid outlet pipe 27, wherein one end of the liquid inlet pipe 26 is connected to the blood outlet end of the blood purifier 17, and the other end of the liquid inlet pipe 26 is connected to the inlet end 82 of the intravenous pot 8, when the blood purifier 17 is used for the human body After the blood is purified, the liquid inlet pipe 26 outputs the purified blood to the pot body 81, one end of the liquid outlet pipe 27 is connected to the outlet end 85 of the venous pot 8, and the other end of the liquid outlet pipe 27 is connected to the human vein through the venous puncture needle, and the liquid outlet pipe 27 returns the blood in the pot body 81 to the human vein; the gas regulating end 84 of the venous pot 8 is connected to the branch pipe 19, and the atmospheric pressure in the pot body 81 can be adjusted through the branch pipe 19, so that the liquid in the pot body 81 is maintained at a certain liquid level. Specifically, the branch pipe 19 is provided with: filter 20, first three-way 21, second three-way 22, pressure detection module 23, air pipe 24, air pump 25 and other components; the filter 20 is used to remove the liquid in the atmosphere, so that the branch pipe 19 can achieve the effect of "only gas but no liquid".

Specifically, if the liquid level in the venous pot 8 needs to be raised, the first tee 21 and the second tee 22 are controlled to connect the air pipe 24 and the branch pipe 19 in sequence, wherein one end of the branch pipe 19 is directly connected to the outside atmosphere, and the air pump 25 is turned off. The venous clamp 4 is closed, and the liquid outlet pipe 27 is turned off. The liquid in the pot body 81 rises as the liquid from the liquid inlet pipe 26 enters, and the excess gas in the pot body 81 is discharged to the outside atmosphere through the branch pipe 19 and the trachea 24. When the liquid level in the pot body 81 rises to the height expected by the user, the venous clamp 4 is opened, the first tee 21 is used to close the gas transmission channel, and the atmospheric pressure in the pot body 81 is detected by the pressure detection module 23 to ensure the safety of blood transmission in the venous line 1.

If it is necessary to lower the liquid level in the venous pot 8, the air pump 25 is controlled to be connected to the branch pipe 19, and the air pump 25 is started, the venous clamp 4 remains in an open state, and the air pump 25 injects the atmosphere into the pot body 81 through the branch pipe 19, so that the atmospheric pressure in the pot body 81 increases and the liquid level in the pot body 81 decreases. When the liquid level in the pot body 81 drops to the height expected by the user, the first three-way valve 21 is used to close the gas transmission channel, and the atmospheric pressure in the pot body 81 is detected by the pressure detection module 23, so that the liquid level of the venous pot 8 remains in a stable state.

Therefore, according to FIG. 4 , the adjustment of the liquid level in the intravenous pot 8 is mainly achieved by changing the atmospheric pressure in the pot body 81 through the branch pipe 19 .

It can be seen that the liquid level of the intravenous pot is an important parameter in the blood purification treatment process. The liquid level of the intravenous pot should not be too high or too low. For example, when the liquid level in the intravenous pot is too low, the liquid in the outlet tube is easily mixed with bubbles; if the bubbles mixed in the liquid in the outlet tube are returned to the human body, the patient may experience breathing difficulties, chest pain, coughing, blood pressure drop, asthma, and severe cases will cause coma and death; on the contrary, if the liquid level of the intravenous pot is too high, the blood in the pot can be easily backflowed into the branch tube, which will lead to cross-infection of blood in the branch tube, and the blood in the intravenous pot is prone to coagulation failure. Therefore, the liquid level of the intravenous pot needs to be maintained at a reasonable level. The liquid level of the intravenous pot can be detected by ultrasound, optics, capacitance, etc. The liquid level safety in the intravenous pot can be monitored in real time through the liquid level detection method.

It should be noted here that the liquid level detector is a common electronic component, which mainly detects the liquid level in the intravenous pot by ultrasound, optics, capacitance and other methods. No matter which type of liquid level detector is used, the liquid level detector can only be fixed at a certain height of the outer wall of the pot body of the intravenous pot. As shown in FIG4 , the liquid level detector 7 is used to detect whether the liquid level in the intravenous pot has reached this height; the liquid level detector 7 cannot detect the continuous change of the liquid level in the intravenous pot within a large range. For example, if it is necessary to detect whether the liquid level in the intravenous pot has reached 1/3 of the height of the intravenous pot through the liquid level detector 7, the liquid level detector 7 needs to be set at 1/3 of the height of the outer wall of the pot body 81 of the intravenous pot.

Referring to FIG. 3 , the blood purification system of this embodiment includes: a blood circuit, a blood purifier 17 , and a venous pot 8 .

5 , the blood purification system further includes: a liquid level detector 7 , a liquid level increasing module 100 , a starting module 200 and a first fault detection module 300 .

A liquid level detector is arranged on the intravenous pot, and when the liquid level detector detects that the liquid level of the intravenous pot reaches the first preset liquid level, it sends out a liquid level prompt signal.

Specifically, the liquid level detector is used to detect whether the liquid level in the intravenous pot has reached a first preset liquid level, wherein the first preset liquid level represents the liquid level warning value in the intravenous pot, and may also represent the liquid level minimum warning value in the intravenous pot. For example, the highest liquid level that the pot body of the intravenous pot can accommodate is used as a reference, and the first preset liquid level is 1/3 of the pot body height, wherein the first preset liquid level is a pre-set fixed value; when the liquid level detector detects that the liquid level in the intravenous pot is higher than or equal to the first preset liquid level, a liquid level prompt signal is issued.

The liquid level increasing module is used to increase the liquid level of the intravenous kettle according to the detected first trigger operation of the user.

Optionally, the liquid level adjustment module may include a physical button or a virtual button on a touch screen, and when the first trigger operation output by the user triggers the physical button or the virtual button on the touch screen, the liquid level in the intravenous kettle will rise. Referring to FIG4 , the specific way in which the liquid level in the intravenous kettle rises is as follows: when the first trigger operation output by the user triggers the physical button or the virtual button on the touch screen, the liquid level adjustment module controls the first three-way valve 21 and the second three-way valve 22 to sequentially connect the air pipe 24 and the branch pipe 19 according to the detected first trigger operation of the user, closes the air pump 25, closes the intravenous clamp 4, and the liquid outlet pipe 27 is turned off, and the liquid in the kettle body 81 rises as the liquid in the liquid inlet pipe 26 enters, and the excess gas in the kettle body 81 is discharged to the outside atmosphere through the branch pipe 19 and the air pipe 24.

In this embodiment, the liquid level rising time in the intravenous pot is determined by the trigger time of the liquid level increasing module being triggered by the first trigger operation. For example, when the liquid level increasing module is continuously triggered for 5 seconds by the first trigger operation, the liquid level in the intravenous pot will rise for 5 consecutive seconds.

The start module is used to control the blood purifier to perform blood purification according to the blood treatment mode.

Please refer to Figure 3. The user selects a blood purification blood treatment mode according to the patient's clinical symptoms. Under the selected blood treatment mode, the peristaltic pump 5 is controlled to start running, and the arterial line 1 transfers blood to the blood purifier 17 to start the blood purification process of the blood purifier 17.

The first fault detection module is used to record the first time length of the liquid level adjustment module being continuously triggered when the liquid level detector sends out the liquid level prompt signal, and send out a liquid level fault signal when the first time length is greater than or equal to a first preset time length.

In this embodiment, when the user continuously performs the first triggering operation on the liquid level increasing module, the liquid level increasing module is continuously triggered, and the liquid level of the intravenous kettle is continuously increased. The length of time the liquid level increasing module is continuously triggered is also the length of time the liquid level of the intravenous kettle is continuously increased.

When the liquid level detector sends out a liquid level prompt signal, it indicates that the liquid level in the intravenous pot is greater than or equal to the first preset liquid level; under the condition that the liquid level in the intravenous pot is greater than or equal to the first preset liquid level, it is detected whether the first time length for which the liquid level adjustment module is continuously triggered reaches the first preset time length. Once it is detected that the first time length for which the liquid level adjustment module is continuously triggered is greater than or equal to the first preset time length, the liquid level in the intravenous pot may rise above the maximum liquid level warning value, and the liquid in the intravenous pot will flow back into the branch pipe of the intravenous pot. For example, due to the user's negligence, the user's unskilled operation, the user's distraction and forgetfulness, or the physical failure of the liquid level adjustment module itself, etc., the liquid level adjustment module is continuously triggered for 10 seconds (for example, the first preset time length is 5 seconds), and the liquid level in the intravenous pot will rise continuously within 10 seconds, which can easily fill the pot body. In the process of raising the liquid level of the venous pot in this embodiment, by setting the limit value of the length of time that the liquid level increase adjustment module is continuously triggered (that is, the first preset time length), it is possible to avoid the liquid level of the venous pot rising for too long and filling the venous pot, thereby endangering the safety of the patient's blood purification treatment.

Specifically, there are three situations:

(1) The current liquid level in the intravenous pot is lower than the first preset liquid level. If the liquid level increasing module starts to increase the liquid level in the intravenous pot according to the detected first trigger operation, the liquid level detector will not send out a liquid level prompt signal. At this time, there is no need to record the length of time that the liquid level increasing module is continuously triggered. If, during the length of time that the liquid level increasing module is continuously triggered, the liquid level in the intravenous pot rises but is always lower than the first preset liquid level, it is equivalent to the first time length being equal to 0, and the first fault detection module will not send out a liquid level fault signal.

(2) The current liquid level in the intravenous pot is lower than the first preset liquid level. If the liquid level increasing module starts to increase the liquid level in the intravenous pot according to the detected first trigger operation, the liquid level detector will not send out a liquid level prompt signal. At this time, there is no need to record the length of time the liquid level increasing module is continuously triggered. If the liquid level in the intravenous pot rises to the first preset liquid level within the length of time the liquid level increasing module is continuously triggered, the liquid level detector starts to send out a liquid level prompt signal, and the first fault detection module starts to record the first length of time the liquid level increasing module is continuously triggered, and determines whether the recorded first length of time the liquid level increasing module is continuously triggered is greater than or equal to the first preset time (please note that the "recorded first length of time the liquid level increasing module is continuously triggered" here is taken as the starting point from the time when the liquid level detector starts to send out the liquid level prompt signal, rather than the time when the liquid level increasing module starts to increase the liquid level in the intravenous pot).

(3) The current liquid level in the intravenous pot is greater than or equal to the first preset liquid level. If the liquid level increasing module starts to increase the liquid level in the intravenous pot according to the detected first trigger operation, the liquid level detector sends a liquid level prompt signal and records the first time length that the liquid level increasing module is continuously triggered, and determines whether the first time length that the liquid level increasing module is continuously triggered is greater than or equal to the first preset time length.

Therefore, this embodiment will only record the first time length of the liquid level increasing module being continuously triggered when the liquid level in the intravenous pot reaches the first preset liquid level, so as to accurately determine whether the intravenous pot is filled with liquid during the process of raising the liquid level of the intravenous pot.

In one embodiment, the blood purification system further includes: a time setting module.

The time setting module is used to detect the capacity of the venous pot and set the first preset time length according to the capacity of the venous pot.

Specifically, the capacity of the intravenous pot may refer to: the maximum volume of liquid that the intravenous pot can hold; for example, the capacity of the intravenous pot is 200 ml. According to the capacity of the intravenous pot, the time when the intravenous pot is filled with liquid can be calculated, so that the first preset time length can be set scientifically and reasonably. For example, the first preset liquid level is 1/3 of the height of the intravenous pot. If the liquid level in the intravenous pot reaches 1/3 of the height of the intravenous pot, the volume of liquid in the intravenous pot accounts for 1/3 of the capacity of the intravenous pot. If the time for the remaining 2/3 of the capacity in the intravenous pot to be filled with liquid is 20 seconds, then the first preset time length must be less than 20 seconds, for example, the first preset time length is 18 seconds (the specific value can be set based on clinical experience). Therefore, in this embodiment, the first preset time length is set according to the capacity of the intravenous pot, so the first preset time length set will not be too long or too short. When the liquid level in the intravenous pot reaches the first preset liquid level, the first time length of the liquid level increase module being continuously triggered is within the first preset time length, which can ensure that the intravenous pot will not be filled with liquid, so that the safety of liquid level adjustment in the intravenous pot can be guaranteed.

In one embodiment, the blood purification system may further include: a liquid level lowering module, a second fault detection module, and a third fault detection module.

The liquid level lowering module is used to lower the liquid level of the intravenous kettle according to the detected second triggering operation of the user.

Optionally, the liquid level lowering module includes a physical button or a virtual button on the touch screen, wherein the specific implementation of the "liquid level lowering module" may refer to the specific implementation of the "liquid level upper adjusting module" mentioned above.

A second fault detection module is used to record the second time length that the liquid level increase module or the liquid level decrease module is continuously triggered. When the second time length is equal to the second preset time length, if it is detected that the increase in the liquid level of the intravenous pot is less than or equal to the first preset increase or the decrease in the liquid level of the intravenous pot is less than or equal to the first preset decrease, a liquid level increase module fault signal or a liquid level decrease module fault signal is issued.

When the first trigger operation output by the user continuously triggers the liquid level increasing module, it indicates that the user needs to increase the liquid level in the intravenous pot; or, when the second trigger operation output by the user continuously triggers the liquid level decreasing module, it indicates that the user needs to lower the liquid level in the intravenous pot.

The second fault detection module is used to detect whether the liquid level increasing module or the liquid level decreasing module is in a faulty state; for example, the second preset time length is 5 seconds, and the first preset increment is 0.5 cm. When the second fault detection module detects that the second time length is equal to 5 seconds, the increase in the liquid level of the intravenous kettle is 0, which means that the liquid level increasing module has been continuously triggered for 5 seconds, and the liquid level of the intravenous kettle has not risen. It can be judged that the liquid level increasing module is in a faulty state, and a liquid level increasing module fault signal is issued to prompt the user: the liquid level increasing module has failed; or, the second preset time length is 5 seconds, and the first preset decrement is 0.5 cm. When the second fault detection module detects that the second time length is equal to 5 seconds, the decrease in the liquid level of the intravenous kettle is 0, which means that the liquid level decreasing module has been continuously triggered for 5 seconds, and the liquid level of the intravenous kettle has not dropped. It can be judged that the liquid level decreasing module is in a faulty state, and a liquid level decreasing module fault signal is issued to prompt the user: the liquid level decreasing module has failed. The increase or decrease in the liquid level of the venous pot can be obtained by weighing the venous pot.

Therefore, this embodiment detects whether the increase in the liquid level of the intravenous pot reaches the first preset increase or the decrease in the liquid level of the intravenous pot reaches the first preset decrease within the second time length when the liquid level increase module or the liquid level decrease module is continuously triggered. If the first preset increase or the first preset decrease is reached, it means that the liquid level increase module is in a normal state or the liquid level decrease module is in a normal state, and the user can control the liquid level in the intravenous pot to increase through the first trigger operation or the user can control the liquid level in the intravenous pot to decrease through the second trigger operation; if the first preset increase or the first preset decrease is not reached, it means that the liquid level increase module is in a fault state or the liquid level decrease module is in a fault state, and triggering the liquid level increase module through the first trigger operation or the liquid level decrease module through the second trigger operation is an invalid operation, and the user needs to be reminded: there is no need to trigger the liquid level increase module or the liquid level decrease module again. Therefore, the user can be reminded in time through the liquid level increase module fault signal or the liquid level decrease module fault signal to avoid the problem that the liquid level of the intravenous pot cannot be adjusted for a long time, and improve the control response speed of the liquid level increase module or the liquid level decrease module.

The second preset time length is less than or equal to the first preset time length.

For example, the second preset time length is 3 seconds, and the first preset time length is 5 seconds. Setting the relative size between the second preset time length and the first preset time length can more scientifically and quickly evaluate whether the liquid level increase module or the liquid level decrease module is in a fault state, and within the first preset time length, the user can more flexibly choose the time to adjust the liquid level in the intravenous pot, which brings greater operational flexibility to the user.

It should be noted that the "liquid level adjustment module (liquid level increase adjustment module or liquid level decrease adjustment module) is continuously triggered" mentioned above can mean: the liquid level adjustment module is continuously and uninterruptedly triggered. For example, the liquid level increase adjustment module is continuously triggered by the first trigger operation, and the length of time it is continuously triggered is 10 seconds; for another example, after the liquid level increase adjustment module is continuously triggered by the first trigger operation for 5 seconds, it is interrupted for 1 second, and then the liquid level increase adjustment module is continuously triggered by the first trigger operation for 5 seconds, then the length of time the liquid level increase adjustment module is continuously triggered is 5 seconds; that is, the "length of time it is continuously triggered" cannot be calculated by accumulating the trigger time after the interruption.

The third fault detection module is used for sending out a first alarm signal when the liquid level detector fails to send out the liquid level prompt signal.

Specifically, if the liquid level detector does not send out a liquid level prompt signal, it may indicate that the liquid level in the intravenous pot is lower than the first preset liquid level, which is equivalent to that the liquid level in the intravenous pot may be lower than the minimum liquid level warning value. The third fault detection module sends out a first alarm signal to remind the user that the liquid level in the intravenous pot may be too low. The first alarm signal may be a first sound and light alarm signal.

In one embodiment, the blood purification system further includes: a venous clamp.

The venous clamp is arranged on the blood circuit, and is used to cut off the blood circuit according to the first alarm signal to interrupt the blood purification process, and to conduct the blood circuit according to the liquid level prompt signal to restart the blood purification process.

When the liquid level in the venous pot is too low, the venous clamp closes the outlet pipe of the venous line according to the first alarm signal to interrupt the flow of liquid in the outlet pipe, thereby preventing bubbles from entering the outlet pipe due to the low liquid level, which may endanger the safety of the patient's blood purification treatment. When the liquid level detector outputs the liquid level prompt signal again, it means that the liquid level of the venous pot has returned to the normal level, the outlet pipe is reopened, and the blood purification process of the blood purifier is restarted.

In one embodiment, the blood purification system further includes: a pressure detection module and a pressure fault module.

The pressure detection module is used to detect the atmospheric pressure in the intravenous pot; the pressure fault module is used to send out a second alarm signal when the pressure in the intravenous pot is greater than a preset pressure, wherein the second alarm signal may be a second sound and light alarm signal.

As shown in FIG4 , the atmospheric pressure in the venous kettle is detected by the pressure detection module 23; illustratively, the preset atmospheric pressure is 100 mmHg, and the atmospheric pressure in the venous kettle detected by the pressure detection module 23 is 110 mmHg. When the atmospheric pressure in the venous kettle is detected to be greater than the preset atmospheric pressure, it indicates that the pressure in the venous kettle is abnormal; for example, the venous line is clamped or kinked, which will make the atmospheric pressure in the venous kettle greater than the preset atmospheric pressure, and the second sound and light alarm signal is used to remind the medical staff that the atmospheric pressure in the venous kettle is abnormal, and the user needs to deal with the abnormal pressure in the venous kettle in time. This embodiment can timely eliminate the safety of the patient during the blood purification process.

Among them, the pressure detection module is used to detect the pressure in the venous pot when the liquid level adjustment module is not triggered by the first trigger operation; therefore, the pressure detection module will detect the pressure in the venous pot only when the liquid level of the venous pot is not in the adjustment stage, and the pressure in the venous pot detected by the pressure detection module has higher accuracy.

In one embodiment, the blood purification system further includes: a weighing module and a first weight detection module.

The weighing module is used to weigh the weight of the intravenous bottle to obtain a weight detection value; after weighing the weight of the intravenous bottle, it can be indirectly deduced based on the weight detection value whether the liquid in the intravenous bottle is filled.

The first weight detection module is used to control the venous clamp to be closed when it is detected that the weight detection amount is greater than the weight warning value. The first weight detection module determines whether the weight detection amount is greater than the weight warning value, and if it is determined that the weight detection amount is greater than the weight warning value, the venous clamp is controlled to be closed.

The weight warning value may refer to: the weight of the intravenous pot when the liquid level of the intravenous pot is the highest liquid level warning value. When it is determined that the weight detection amount is greater than the weight warning value, it means that the liquid level in the intravenous pot is too high, and there is a risk that the intravenous pot is filled; the intravenous clamp is turned off, the liquid outlet tube is turned off, and the peristaltic pump is controlled to stop to terminate the blood purification treatment process, so that the user can deal with the abnormal liquid level failure of the intravenous pot in time. Therefore, this embodiment determines whether the liquid level contained in the intravenous pot exceeds the normal value according to the weight of the intravenous pot, and can accurately monitor whether the liquid in the intravenous pot is at risk of being filled.

Optionally, the weighing module is also used to calculate the weight change based on the weight detection value; for example, the weighing module calculates the weight increase rate of the intravenous bottle (i.e., the weight change) to be: 10g/min; further, the change in the volume of the liquid in the intravenous bottle can be obtained based on the weight change.

The blood purification system further includes: a second weight detection module, a third weight detection module and a fourth weight detection module.

The second weight detection module is used to detect whether the weight change is within a preset error range when the liquid level increase module does not detect the first trigger operation and the liquid level decrease module does not detect the second trigger operation. If it is detected that the weight change is not within the preset error range, it is determined that the venous kettle has a leakage fault or a blockage fault.

Please refer to FIG4. When the liquid level increase module and the liquid level decrease module are not triggered, the blood is transported to the pot body 81 of the venous pot through the liquid inlet pipe 26 of the venous line, and the blood is output to the human body's vein through the liquid outlet pipe 27 of the venous line. Since the blood purification efficiency of the blood purifier is usually maintained in a stable state, the blood inflow and outflow in the venous pot are maintained in a balanced state, and the weight change of the venous pot will also be within the preset error range, for example, the preset error range is: -10g/min~10g/min; when the weight change of the venous pot is not within the preset error range, it means that the venous pot is out of Abnormal weight failure occurs; for example, when the weight increase rate of the venous kettle is detected to be 12g/min, which is greater than 10g/min, it means that the weight of the venous kettle increases too fast and the venous kettle has a blockage failure (that is, blood coagulation occurs in the venous kettle, resulting in blood clots, which delay or block the output rate of blood in the venous kettle); when the weight decrease rate of the venous kettle is detected to be 12g/min, which is greater than 10g/min, it means that the weight of the venous kettle decreases too fast and the venous kettle has a leakage failure (that is, gaps appear in the tube wall or connection of the venous kettle, causing the blood in the venous kettle to leak to the outside).

The third weight detection module is used to detect whether the weight change (the weight change is the weight increase value at this time) is greater than the preset safety increase value when the liquid level adjustment module detects the first trigger operation. If it is detected that the weight change is greater than the preset safety increase value, it is determined that the intravenous kettle has a liquid level adjustment too fast fault.

Specifically, when the liquid level increasing module is triggered by the first trigger operation, the liquid level in the venous pot gradually rises, and by detecting the weight increase of the venous pot, it is determined whether the liquid level in the venous pot is increased too quickly; when it is detected that the weight increase of the venous pot is greater than the preset safety increase, it is determined that the liquid level in the venous pot is increased too quickly due to the excessive blood flow rate in the blood circuit; when the blood flow rate in the blood circuit is too fast, the blood purification efficiency of the blood purifier will be reduced, and it will cause discomfort to the patient during the blood purification treatment.

The fourth weight detection module is used to detect whether the weight change (the weight change is the weight reduction value at this time) is greater than the preset safety reduction value when the liquid level reduction module detects the second trigger operation. If it is detected that the weight change is greater than the preset safety reduction value, it is determined that the intravenous kettle has a liquid level reduction too fast fault.

Specifically, when the liquid level reduction module is triggered by the second trigger operation, the liquid level in the venous kettle will drop and the weight of the venous kettle will decrease. As mentioned above, the reduction of the liquid level in the venous kettle is achieved by injecting the atmosphere into the kettle body through the air pump. When the weight reduction value of the venous kettle is greater than the preset safety reduction value, it means that the liquid level in the venous kettle drops too fast; accordingly, the rate at which the atmosphere is injected into the kettle body by the air pump is too fast, which makes it easy for bubbles to be introduced into the liquid in the outlet pipe of the venous line, and then causes the blood to easily have bubble failures during the blood circuit transmission process. For example, if the preset safety reduction value is 10g/min, and the weight reduction value of the venous kettle is detected to be 12g/min, it means that the weight of the venous kettle drops too fast, and it is directly concluded that the liquid level of the venous kettle is reduced too fast. Therefore, by monitoring the weight reduction value of the venous kettle, it is possible to accurately determine whether the liquid level reduction in the venous kettle is in a fault state.

In one embodiment, the blood purification system further includes: a fluid infusion module.

The fluid replenishment module is used to transfer the replenishment fluid into the intravenous pot according to the detected fluid replenishment operation of the user.

During the blood purification treatment, the user also needs to output the supplementary fluid into the intravenous pot, so that the purified blood and the supplementary fluid are mixed in the intravenous pot, and then returned to the human vein through the liquid outlet tube. The supplementary fluid can be fresh plasma, a solution containing elements required by the human body, or a disease treatment solution, etc.; the specific composition of the supplementary fluid can be determined according to the clinical needs of the patient and the selected blood treatment mode. Please refer to Figure 4, the intravenous pot also includes a rehydration end 83 arranged above the pot body 81, and the venous line also includes a rehydration tube 18; the rehydration end 83 is connected to one end of the rehydration tube 18, and when the user's rehydration operation is detected, the supplementary fluid is output to the intravenous pot through the rehydration tube 18, so as to rehydrate the intravenous pot according to the patient's clinical treatment needs, which can improve the patient's blood purification treatment effect.

In one embodiment, the blood purification system further includes: a timing module.

The timing module is used to record the third time length of continuous access to the supplementary liquid in the intravenous bottle when the liquid level detector sends out the liquid level prompt signal, and send out a liquid replenishment fault signal when the third time length is greater than or equal to the third preset time length.

In order to prevent the problem that the intravenous pot is filled with liquid when the replenishing liquid is transferred into the intravenous pot by the replenishing module; in this embodiment, when the liquid level detector sends out the liquid level prompt signal, the timing module records the continuous time of the replenishing module transferring the replenishing liquid into the intravenous pot (i.e., replenishing the intravenous pot), and when the third time length of continuous access to the replenishing liquid in the intravenous pot is greater than or equal to the third preset time length, it means that the continuous replenishment time of the intravenous pot is too long, and the liquid level in the intravenous pot can easily exceed the maximum safety warning liquid level, and the timing module sends out a replenishment fault signal to remind the user: the continuous replenishment of the intravenous pot by the replenishing module may cause the intravenous pot to be filled; for example, the third preset time length is 10 minutes, when the replenishing module has been continuously replenishing for more than 11 minutes, the intravenous pot may be filled with the replenishing liquid tank.

Specifically, there are three situations:

(1) The current liquid level in the intravenous pot is lower than the first preset liquid level. If the refilling module starts to refill the intravenous pot according to the detected refilling operation, the liquid level detector will not send out a liquid level prompt signal. At this time, there is no need to record the length of time for continuous refilling in the intravenous pot. If, during the length of time for continuous refilling in the intravenous pot, the liquid level in the intravenous pot increases but is always lower than the first preset liquid level, it is equivalent to the third time length being equal to 0, and the timing module will not send out a refilling fault signal.

(2) The current liquid level in the intravenous pot is lower than the first preset liquid level. If the refilling module starts to refill the intravenous pot according to the detected refilling operation, the liquid level detector will not send out a liquid level prompt signal. At this time, there is no need to record the duration of continuous refilling of the intravenous pot. If the liquid level in the intravenous pot rises to the first preset liquid level within the duration of continuous refilling of the intravenous pot, the liquid level detector starts to send out a liquid level prompt signal, and the timing module starts to record the third duration of continuous refilling of the intravenous pot, and determines whether the third duration of continuous refilling of the intravenous pot recorded is greater than or equal to the third preset time (please note that the "third duration of continuous refilling of the intravenous pot recorded" here is calculated from the time when the liquid level detector starts to send out a liquid level prompt signal, rather than when refilling of the intravenous pot starts).

(3) The current liquid level in the intravenous pot is greater than or equal to the first preset liquid level. If the refilling module starts to refill the intravenous pot according to the detected refilling operation, the liquid level detector sends a liquid level prompt signal and records the third time length of continuous refilling of the intravenous pot, and determines whether the third time length of continuous refilling of the intravenous pot is greater than or equal to the third preset time length.

In one embodiment, the blood purification system further includes: a color detection module.

The color detection module is used to detect the color of the liquid in the venous pot. During the blood purification treatment, the venous pot is used to store the purified blood, and the color of the liquid in the venous pot is red; the color detection module detects that the color of the liquid in the venous pot is red. If the color detection module detects that the color of the liquid in the venous pot is not red, it means that there is a fault in the patient's blood purification treatment process. Furthermore, when the blood purification system is drawing blood or returning blood, the color of the liquid detected by the color detection module can be used to determine whether the blood purification system has successfully drawn blood or returned blood, which is convenient for safe control of the patient's blood purification treatment process.

In one embodiment, the blood purification system further includes: a flow rate setting module.

The flow rate setting module is used to set the infusion flow rate according to the liquid level in the intravenous pot; at this time, the infusion module is also used to transfer the supplementary fluid into the intravenous pot according to the infusion flow rate based on the detected user's infusion operation.

When the user needs to transfer the supplementary fluid into the intravenous pot, in order to ensure the safety of the liquid level of the intravenous pot during the rehydration process, the present embodiment sets the rehydration flow rate according to the liquid level in the intravenous pot, so that the rate at which the intravenous pot is connected to the supplementary fluid will not cause the liquid level in the intravenous pot to rise sharply, thereby preventing the problem of the intravenous pot being filled due to the access to the supplementary fluid. For example, when the liquid level in the intravenous pot is 1/3 of the height of the intravenous pot, the rehydration flow rate needs to be set as large as possible; for another example, when the liquid level in the intravenous pot is 2/3 of the height of the intravenous pot, the rehydration flow rate needs to be set as small as possible. Therefore, the rehydration flow rate in the present embodiment will change according to the change of the liquid level in the intravenous pot, thereby ensuring the safety of rehydration in the intravenous pot.

In one embodiment, the blood purification system further includes: an ultrasonic detection module.

The ultrasonic detection module is used to perform ultrasonic detection on the liquid in the intravenous pot to detect whether solid precipitates are generated in the intravenous pot, and if solid precipitates are generated, a fourth alarm signal is issued. The fourth alarm signal may be a fourth sound and light alarm signal.

Since the venous kettle is used to store blood, after a certain volume of blood is accumulated in the venous kettle, the flow rate of blood in the venous kettle will slow down, especially when the liquid level in the venous kettle is relatively high, it will cause blood to easily coagulate in the venous kettle, and then some solid precipitates will adhere to the inner wall and bottom of the kettle of the venous kettle; this coagulation phenomenon will cause the outlet of the venous kettle to be blocked, which will cause the patient to lose blood. Therefore, this embodiment performs ultrasonic detection on the liquid in the venous kettle, and the specific method can be: emitting ultrasonic waves into the venous kettle, if solid precipitates are generated in the venous kettle, the ultrasonic waves will be reflected, refracted and the signal will be attenuated by the solid precipitates, and the signal waveform of the received ultrasonic waves will also change, so according to the signal waveform of the received ultrasonic waves, it can be judged whether the venous kettle produces solid precipitates. After the ultrasonic detection of the liquid in the venous kettle, it is detected that the venous kettle produces solid precipitates; it means that the kettle body of the venous kettle has a coagulation failure, and then the fourth alarm signal is issued; when the user sees the fourth alarm signal, it can be obtained that: the venous kettle has a coagulation failure, so as to remind the user to deal with the coagulation failure in time to ensure the safety of the patient's blood purification.

Optionally, the venous clamp closes the outlet tube of the venous line according to the fourth alarm signal to interrupt the patient's blood purification process, thereby preventing the solid precipitates in the venous pot from being transported to the human body's veins and preventing the solid precipitates produced by blood coagulation from being connected to the human body, thereby endangering the patient's blood purification safety.

In one embodiment, the blood circuit includes an arterial line and a venous line, and the blood purification system further includes: a bubble sensor module.

The bubble sensing module is used to detect whether there are bubbles in the venous line connected to the outlet of the venous pot when the liquid level detector does not send the liquid level prompt signal, and send a third alarm signal if bubbles are detected in the venous line connected to the outlet of the venous pot. The third alarm signal can be a third sound and light alarm signal.

Please refer to FIG. 3 and FIG. 4 , the bubble sensing module (such as the bubble detector 10 in FIG. 3 ) is arranged on the outlet pipe 27 of the venous line connected to the outlet end 85 of the venous kettle, and the bubble sensing module detects whether there are bubbles in the outlet pipe 27 to prevent the outlet pipe 27 from transmitting bubbles to the human veins and endangering the patient's blood purification safety; if the bubble sensing module detects that there are bubbles in the outlet pipe 27, a fourth alarm signal is issued to prompt the user to deal with the bubble failure of the outlet pipe 27 in time. In addition, in this embodiment, the bubble sensing module will only detect whether there are bubbles in the outlet pipe 27 when the liquid level detector 7 does not output the liquid level prompt signal; because the liquid level in the venous kettle is relatively low when the liquid level in the venous kettle does not reach the first preset liquid level, the liquid level in the venous kettle is relatively low, and bubbles are easily generated in the liquid in the outlet pipe 27, and the bubble sensing module will realize the bubble detection function at this time; when the liquid level in the venous kettle reaches the first preset liquid level, the liquid level in the venous kettle is relatively high, and bubbles will not appear in the outlet pipe 27, and the bubble sensing module does not need to detect whether there are bubbles in the outlet pipe 27. The bubble sensing module has a high bubble detection efficiency.

In one embodiment, the blood circuit includes an arterial line and a venous line, and the blood purification system further includes: a flow rate detection module and a flow rate fault module.

The flow rate detection module is used to detect the flow rate of the liquid in the arterial line when the liquid level detector sends the liquid level prompt signal and the liquid level adjustment module is triggered to obtain a flow rate detection value. When the liquid level in the venous pot is greater than or equal to the first preset liquid level, and the liquid level adjustment module controls the liquid level in the venous pot to be raised according to the detected first trigger operation, it is necessary to detect the flow rate of the liquid in the arterial line (that is, the rate at which the venous pot is connected to the liquid) to obtain a flow rate detection value; for example, the flow rate detection value detected in the arterial line is 5ml/min.

The flow rate fault module is used to send a flow rate fault signal when the flow rate detection value is greater than the preset safety flow rate. The preset safety flow rate can be the maximum rate of access to liquid that the intravenous pot can withstand when the liquid level detector sends the liquid level prompt signal and the liquid level adjustment module is triggered (the preset safety flow rate can be obtained by clinical trials). If the liquid flow rate in the arterial line is greater than the preset safety flow rate, the liquid level in the intravenous pot will rise very quickly when the user adjusts the liquid level in the intravenous pot, which is not conducive to the liquid level adjustment of the intravenous pot; for example, when the liquid level adjustment module is triggered by the first trigger operation, the liquid level in the intravenous pot rises too fast, and the user is not given enough reaction time. It is difficult for the user to adjust the liquid level in the intravenous pot to the desired liquid level, which will bring great inconvenience to the user's operation. Therefore, this embodiment sets a preset safety flow rate to improve the ease of operation of adjusting the liquid level in the intravenous pot; if the flow rate fault module sends a flow rate fault signal, the user will take corresponding measures: such as reducing the liquid flow rate in the arterial line to make it more convenient to adjust the liquid level in the intravenous pot.

It should be noted that the data involved in the tables, graphs and formulas in this application specification are only for illustration and do not mean that these are the pressure values used in actual application of the blood purification equipment.

It should be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

It should also be understood that the term “and/or” used in the specification and appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (10)

1. A blood purification system comprising a blood circuit, a blood purifier, a venous kettle, characterized in that the blood purification system further comprises:

the liquid level detector is arranged on the venous kettle and is used for sending a liquid level prompt signal when detecting that the liquid level of the venous kettle reaches the first preset liquid level, and the first preset liquid level is a liquid level warning value of the venous kettle;

The liquid level up-regulating module is used for regulating the liquid level of the venous kettle to be high according to the detected first trigger operation of the user at any time before, during or after the liquid level of the venous kettle reaches the first preset liquid level;

the starting module is used for controlling the blood purifier to purify blood according to the blood treatment mode;

The first fault detection module is used for recording the first time length of the liquid level up-regulating module continuously triggered when the liquid level detector sends out the liquid level prompt signal, and sending out a liquid level fault signal when the first time length is greater than or equal to a first preset time length.

2. The blood purification system of claim 1, wherein the blood purification system further comprises:

the liquid level down regulating module is used for regulating the liquid level of the venous kettle down according to the detected second triggering operation of the user;

The second fault detection module is used for recording a second time length for continuously triggering the liquid level up-regulating module or the liquid level down-regulating module, and sending out a fault signal of the liquid level up-regulating module or a fault signal of the liquid level down-regulating module if the liquid level increase of the venous kettle is detected to be smaller than or equal to a first preset increment or the liquid level decrease of the venous kettle is detected to be smaller than or equal to a first preset decrement when the second time length is equal to a second preset time length;

and the third fault detection module is used for sending out a first alarm signal when the liquid level detector does not send out the liquid level prompt signal.

3. The blood purification system of claim 2, wherein the blood purification system further comprises:

The venous clip is arranged on the blood circuit and used for cutting off the blood circuit according to the first alarm signal so as to interrupt the blood purification process, and conducting the blood circuit according to the liquid level prompt signal so as to restart the blood purification process.

4. A blood purification system according to claim 3, wherein the blood purification system further comprises:

The weighing module is used for weighing the weight of the venous kettle to obtain a weight detection amount;

And the first weight detection module is used for controlling the venous clip to be turned off when the weight detection amount is detected to be larger than a weight warning value.

5. The blood purification system according to claim 4, wherein,

The weighing module is also used for calculating the weight variation according to the weight detection quantity;

The blood purification system further comprises:

the second weight detection module is used for determining that the venous kettle has liquid leakage fault or blockage fault if the weight change is detected not to be in a preset error range when the liquid level up-regulating module does not detect the first triggering operation and the liquid level down-regulating module does not detect the second triggering operation;

The third weight detection module is used for determining that the venous kettle has a too fast liquid level up-regulation fault if the weight change amount is detected to be larger than a preset safety increase value when the liquid level up-regulation module detects the first trigger operation;

and the fourth weight detection module is used for determining that the venous kettle has too fast liquid level down regulation fault if the weight change is detected to be larger than a preset safety reduction value when the liquid level down regulation module detects the second trigger operation.

6. The blood purification system of claim 1, wherein the blood purification system further comprises:

The fluid infusion module is used for infusing the supplementing fluid into the venous kettle according to the detected fluid infusion operation of the user;

And the timing module is used for recording a third time length of continuously accessing the replenishing liquid into the venous kettle when the liquid level detector sends out the liquid level prompt signal, and sending out a replenishing liquid fault signal when the third time length is greater than or equal to a third preset time length.

7. The blood purification system of claim 6, wherein the blood purification system further comprises:

the flow rate setting module is used for setting the flow rate of the fluid infusion according to the liquid level in the venous kettle;

The fluid infusion module is also used for delivering the fluid infusion to the venous kettle according to the detected fluid infusion operation of the user and the fluid infusion flow rate.

8. The blood purification system of claim 1, wherein the blood purification system further comprises:

the pressure detection module is used for detecting the pressure in the venous kettle;

The pressure fault module is used for sending out a second alarm signal when the pressure in the venous kettle is greater than the preset pressure;

and the color detection module is used for detecting the color of the liquid in the venous kettle.

9. The blood purification system of claim 1, wherein the blood circuit comprises an arterial line and a venous line, the blood purification system further comprising:

and the bubble sensing module is used for sending a third alarm signal if detecting that bubbles exist in a venous pipeline connected with the outlet end of the venous kettle when the liquid level detector does not send the liquid level prompt signal.

10. The blood purification system of claim 1, wherein the blood circuit comprises an arterial line and a venous line, the blood purification system further comprising:

The flow rate detection module is used for detecting the flow rate of the liquid in the arterial pipeline when the liquid level detector sends out the liquid level prompt signal and the liquid level up-regulation module is triggered, so as to obtain a flow rate detection value;

and the flow rate fault module is used for sending out a flow rate fault signal when the flow rate detection value is larger than a preset safe flow rate.