CN115252933A - Blood purification apparatus and storage medium - Google Patents

Blood purification apparatus and storage medium Download PDF

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Publication number
CN115252933A
CN115252933A CN202210736876.7A CN202210736876A CN115252933A CN 115252933 A CN115252933 A CN 115252933A CN 202210736876 A CN202210736876 A CN 202210736876A CN 115252933 A CN115252933 A CN 115252933A
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pressure
blood
blood circuit
value
standard
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董凡
刘冠贤
伍江峰
吴文娟
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Jafron Biomedical Co Ltd
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Jafron Biomedical Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3639—Blood pressure control, pressure transducers specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3663—Flow rate transducers; Flow integrators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/18—General characteristics of the apparatus with alarm
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3327—Measuring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Cardiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • External Artificial Organs (AREA)

Abstract

The application discloses blood purification equipment and storage medium, this equipment includes: a memory for storing a computer program and a processor; the processor is used for executing the computer program and realizing the following method: when the continuous purification time of the blood purifier is detected to be equal to the first preset time, detecting the pressure of the blood circuit to obtain a standard pressure value; determining a pressure alarm range of the blood circuit according to the standard pressure value; when the continuous purification time of the blood purifier is detected to be longer than the first preset time, detecting the pressure of the blood circuit to obtain a pressure detection value; and determining whether the pressure of the blood circuit is failed according to the pressure detection value and the pressure alarm range. Through this kind of mode, this application can provide the judgement standard that has the pressure trouble of higher rationality and science, reduces the judgement error, ensures blood clarification plant's operation safety.

Description

Blood purification apparatus and storage medium
Technical Field
The application relates to the technical field of blood purification, in particular to blood purification equipment and a storage medium.
Background
During the blood purification treatment, various blood purification parameters (such as the pressure of the blood purification pipeline) need to be detected to monitor the safety of the blood purification treatment of the patient. The conventional technology needs to set a pressure warning range according to an empirical value when detecting the pressure of the blood purification circuit, and the setting method completely depends on manual setting, and the pressure warning range is easily set to be too wide or too narrow. Because the constitution of each patient is different, the judgment standard of the pressure fault is different when blood purification is carried out.
Therefore, a reasonable pressure warning range cannot be provided by the traditional manual setting mode, and the judgment error is large; the accuracy requirement of pressure fault judgment of different patients cannot be met, and the application range is limited.
Disclosure of Invention
Based on this, this application provides a blood purification equipment and storage medium, can provide the judgement standard that has the pressure trouble of higher rationality and science, reduces the judgement error, ensures blood purification equipment's operation safety.
In a first aspect, the present application provides a blood purification apparatus comprising: a blood circuit for transporting a liquid and a blood purifier connected in series in the blood circuit for purifying blood; the blood purification apparatus further includes: a memory for storing a computer program and a processor; the processor is configured to execute the computer program and, when executing the computer program, implement a pressure failure detection method of a blood purification apparatus as follows:
when the continuous purification time of the blood purifier is detected to be equal to a first preset time, detecting the pressure of the blood circuit to obtain a standard pressure value;
determining a pressure alarm range of the blood circuit according to the standard pressure value;
when the continuous purification time of the blood purifier is detected to be longer than the first preset time, detecting the pressure of the blood circuit to obtain a pressure detection value;
and determining whether the pressure of the blood circuit is failed according to the pressure detection value and the pressure alarm range.
In a second aspect, the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, causes the processor to implement the pressure failure detection method of a blood purification apparatus as described above.
When the continuous purification time of the blood purifier is equal to first preset time, it is indicated that the purification process of the blood purifier is in a stable state, the pressure of a blood circuit is also in a stable state, and at the moment, the pressure obtained by detecting the blood circuit is used as a standard pressure value; therefore, the judgment standard of the pressure fault is set according to the pressure value of the blood circuit, the judgment standard of the pressure fault has higher rationality and scientificity, the pressure fault judgment error of the blood circuit is reduced, and the operation safety of the blood purification equipment can be guaranteed.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the blood purification apparatus of the present application;
FIG. 2 is a schematic diagram of the operation of an embodiment of the blood purification apparatus of the present application;
FIG. 3 is a schematic flow chart illustrating an embodiment of a pressure failure detection method of the blood purification apparatus of the present application;
FIG. 4 is a graph showing the relationship between the liquid flow rate of the line and the pressure fluctuation range of the line in the pressure failure detection method of the blood purification apparatus according to the present application;
fig. 5 is a schematic structural diagram of another embodiment of the blood purification apparatus of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
Before describing the embodiments of the present application in detail, the related technical content will be introduced.
The blood purifying equipment is one device to take patient's blood out of body, eliminate some pathogenic matter and purify blood for disease treatment. Taking a Continuous Renal Replacement Therapy (CRRT) machine as an example, the CRRT machine can realize blood purification Therapy such as dialysis/filtration, perfusion, ultrafiltration, and the like, and fig. 1 shows a schematic structural diagram of the CRRT machine. With the continuous development of blood purification technology, the CRRT machine has been gradually expanded to the rescue and treatment of patients with acute and severe renal insufficiency, such as multiple organ dysfunction syndrome, systemic inflammatory response syndrome, fulminant hepatic failure, severe hemorrhagic necrotizing pancreatitis and the like.
During the blood purification treatment process of the CRRT machine, various blood purification parameters (such as the pressure of the blood purification pipeline) need to be detected to monitor the safety of the blood purification treatment of the patient. In the conventional technology, when the pressure of the blood purification pipeline is detected, a pressure warning range needs to be set according to an empirical value. For example, the pressure warning range is: 300mmHg to 400mmHg, which is completely dependent on manual setting, it is very easy to set the pressure warning range too wide or too narrow; if the pressure warning range is set to be too wide, the pressure warning phenomenon of the blood purification pipeline can be omitted (namely, the warning is needed originally, and the warning is not actually provided); if the pressure guard range is set too narrow, a false pressure alarm phenomenon occurs in the blood purification line (i.e., an alarm is not required at all, but actually occurs). And because every patient's physique is different, when every patient carries out blood purification, the pressure fault judgement standard of blood purification pipeline also can be different, for example some patients the pressure ratio of blood purification pipeline is great when blood purification treatment, and some patients the pressure ratio of blood purification pipeline is less when blood purification treatment.
Therefore, the traditional manual setting mode cannot provide a reasonable pressure warning range, and the pressure fault judgment error of the blood purification pipeline is large; the accuracy requirement of pressure fault judgment of different patients cannot be met, and the application range is limited.
When the continuous purification time of the blood purifier is equal to the first preset time, the purification process of the blood purifier is in a stable state, the pressure of a blood circuit is also in a stable state, the pressure obtained by detecting the blood circuit is used as a standard pressure value, the standard pressure value obtained by the method can more accurately reflect the standard numerical value of the blood circuit in the purification process of the blood liquid, and whether the pressure fault occurs in the blood circuit can be accurately judged according to the standard pressure value; therefore, the judgment standard of the pressure fault is set according to the pressure value of the blood circuit, the judgment standard of the pressure fault has higher rationality and scientificity, the pressure fault judgment error of the blood circuit is reduced, and the operation safety of the blood purification equipment can be guaranteed.
In order to better explain the embodiment of the present application, fig. 2 shows the operation principle diagram of a CRRT machine (the CRRT machine belongs to a blood purification device), and as shown in fig. 2, the blood purification device comprises: the blood purifier comprises a blood loop and a blood purifier, wherein the blood loop is used for conveying liquid, the blood purifier is connected in series in the blood loop, and the blood purifier is used for purifying blood. Depending on the line function of the blood circuit, the latter can be divided into: the blood purifier comprises an arterial pipeline, a venous pipeline, an anticoagulation pipeline and the like, wherein the arterial pipeline is connected between an artery of a patient and a blood input end of the blood purifier, and the arterial pipeline outputs the blood of the patient to the blood input end of the blood purifier; the venous pipeline is connected between the vein of the patient and the blood output end of the blood purifier, and the venous pipeline feeds the purified blood back to the vein of the patient; the anticoagulation pipeline is connected with the artery pipeline, and the anticoagulation pipeline is used for exporting the anticoagulant to the artery pipeline, and the anticoagulant plays the anticoagulation effect of blood at blood clarifier and blood return circuit to the mobile security of guarantee blood.
The schematic diagram shown in fig. 2 belongs to the most basic operation schematic diagram of the CRRT machine, and when the CRRT machine is applied to different blood purification treatment modes, the operation schematic diagram of the CRRT machine is expanded on the basis of fig. 2. In different blood purification treatment modes, the types of the blood purifiers can be different, for example, in a blood perfusion treatment mode, the blood purifiers are blood perfusion devices; for another example, in a hemodialysis treatment mode, the blood purifier is a dialyzer; and the like.
As shown in fig. 2, when the liquid flows in the blood circuit, the pressure of the blood circuit changes, for example, the arterial pressure represents the liquid pressure in the arterial line, and it can be determined whether the liquid in the arterial line is blocked according to the arterial pressure; for example, the venous pressure represents the pressure of the fluid in the venous line, and it can be determined from the venous pressure whether the fluid in the venous line is clogged or coagulated. Therefore, the pressure of the blood circuit has a high reference value, and is one of the most important parameters for judging the safety of the blood purification treatment.
Referring to fig. 3, fig. 3 is a schematic flow chart of an embodiment of the pressure failure detection method of the blood purification apparatus of the present application, and it should be noted that the method of the embodiment of the present application is performed by the blood purification apparatus. The blood purification apparatus includes: the blood purification device comprises a blood circuit and blood purifiers, wherein the blood circuit is used for conveying liquid, the blood purifiers are connected in series in the blood circuit, and the blood purifiers are used for purifying blood.
The method comprises the following steps: step S101, step S102, step S103, and step S104.
Step S101: and when the continuous purification time of the blood purifier is detected to be equal to a first preset time, detecting the pressure of the blood circuit to obtain a standard pressure value.
When the blood purification equipment receives the starting operation of a user, a starting instruction is generated, and the blood purifier is controlled to purify according to the starting instruction. Specifically, the blood purification device is controlled to start according to the starting instruction, the blood purifier is connected to the blood, and the blood purifier starts to purify the blood.
The continuous purification time of the blood purifier is calculated with the time point at which the purification of the blood purifier is started as a time starting point. When the blood purification device starts to purify, the blood purification device sequentially goes through a start-up state, a stable state and the like, in the start-up state, blood is introduced into a blood circuit (including an arterial pipeline, a venous pipeline and the like), the pressure of the blood circuit is rapidly changed (generally rapidly increased), when the blood purification reaches the stable state, the blood flow speed in the blood circuit is maintained at a certain relatively stable level, and the pressure of the blood circuit is also in a relatively stable state.
In the embodiment of the present application, the first preset time may refer to a time critical point between the start-up state and the steady state, and when the continuous purification time of the blood purifier is equal to the first preset time, the blood purification stage of the blood purifier will jump from the start-up state to the steady state; and under the first preset time, the detected pressure of the blood circuit is the pressure of the blood circuit in the stable state, and the pressure of the blood circuit in the stable state is taken as a standard pressure value. The standard pressure value may thus represent a reference value for the pressure of the blood circuit of the patient during normal blood purification.
It should be noted that, in the start-up state, the pressure in the blood circuit is not representative, and cannot accurately reflect the actual pressure standard of the tubing set when the patient performs the blood purification treatment. Therefore, when the continuous purification time of the blood purifier is equal to the first preset time, the standard pressure value is obtained, so that the interference of the pressure fluctuation value of the blood circuit to the standard pressure value in the starting state can be eliminated.
It should be noted that the pressure of the blood circuit may refer to: the pressure of the liquid in the blood circuit, wherein the liquid in the blood circuit may refer to blood or anticoagulant, as shown in fig. 2, the liquid in the arterial line is blood, and the liquid in the anticoagulant line is anticoagulant.
Step S102: determining a pressure alarm range of the blood circuit based on the standard pressure value.
There are many ways to determine the pressure alarm range of the blood circuit from the standard pressure value, among which the more common ways are: and determining the pressure alarm range of the blood circuit according to the standard pressure value and a preset pressure alarm span.
The pressure alarm span may represent a normal fluctuation range of the pressure of the blood circuit, and when the blood purifier is in a steady state, the pressure of the blood circuit may fluctuate up and down around a standard pressure value, and the fluctuation standard of the pressure of the blood circuit under normal conditions can be defined through the pressure alarm span.
Specifically, with the standard pressure value as the center value, the difference between the maximum value and the lowest value in the pressure alarm range is exactly equal to the pressure alarm span. Exemplary, standard pressure values are: 100mmHg, pressure alarm span: 100mmHg, the pressure alarm range for the blood circuit may be: 50mmHg to 150mmHg; under the stable state, the pressure of the blood circuit is within 50 mmHg-150 mmHg, and the pressure of the blood circuit is normal; if the pressure of the blood circuit is not within 50mmHg to 150mmHg, the pressure of the blood circuit is abnormal; one of the ways listed here is merely to illustrate the pressure alarm range and is not a technical limitation.
Step S103: and when the continuous purification time of the blood purifier is detected to be longer than the first preset time, detecting the pressure of the blood circuit to obtain a pressure detection value.
Step S104: and determining whether the pressure of the blood circuit is failed according to the pressure detection value and the pressure alarm range.
Wherein, in step S104, determining whether the pressure of the blood circuit is failed according to the pressure detection value and the pressure alarm range may include: and when the pressure detection value is not in the pressure alarm range, determining that the pressure of the blood circuit is in fault, and sending out a pressure alarm signal.
When the blood purifier is in a stable state, whether the pressure of the blood circuit fails or not is judged by detecting the pressure detection value of the blood circuit, and the liquid flowing safety in the blood circuit is monitored. Exemplary pressure alarm ranges for the blood circuit are: 50 mmHg-150 mmHg, if the pressure detection value is 100mmHg, the pressure of the blood circuit is not in the range of 50 mmHg-150 mmHg, and the pressure alarm signal is not sent out; if the pressure detection value is 200mmHg, the 200mmHg is not within 50mmHg to 150mmHg, the pressure of the blood circuit is failed, a pressure alarm signal is sent out, and the pressure alarm signal prompts that: the pressure of the blood circuit is too high to cause a fault (the reason for the pressure of the blood circuit is usually: the blood circuit is blocked), so that the user can deal with the pressure fault of the blood circuit in time to eliminate the fault state of the blood circuit.
It should be noted that the pressure alarm signal may be an audible and visual alarm signal, and when it is detected that the pressure detection value is not in the pressure alarm range, an audible alarm or a light source alarm may be performed to play a role of alarm prompt.
In an embodiment, before determining the pressure alarm range of the blood circuit according to the standard pressure value and the preset pressure alarm span, step S102 may further include: step S105.
Step S105: setting a pressure alarm span of the blood circuit as a function of the detected liquid flow of the blood circuit.
Specifically, the liquid flow of the blood circuit is detected by an ultrasonic sensor, for example, the liquid flow of the blood circuit is: 30ml/min.
Specifically, there is a correlation between the liquid flow rate of the pipeline and the pressure of the pipeline, and multiple technical test evidences show that: the greater the liquid flow rate in the line, the greater the pressure fluctuation range of the line. For example, FIG. 4 shows a graph of the correspondence between the liquid flow rate of the circuit and the pressure fluctuation range of the circuit; it should be noted that the corresponding curves in fig. 4 are summarized according to a plurality of technical tests, and the source of the curves in fig. 4 is not described in detail here.
In the embodiment of the present application, after obtaining the liquid flow rate of the blood circuit, the corresponding pressure alarm span can be found according to the corresponding curve in fig. 4, wherein the liquid flow rate of the blood circuit can be equivalent to the value of the abscissa in fig. 4, and the pressure alarm span of the blood circuit can be equivalent to the value of the ordinate in fig. 4. The pressure alarm span set in the embodiment of the present application and the fluid flow rate of the blood circuit therefore both remain matched. Whether the pressure of the blood circuit is in fault or not can be accurately judged based on the pressure alarm range, and errors caused by the liquid flow change condition of the blood circuit to the pressure fault judgment of the blood circuit can be eliminated.
In an embodiment, the step S105 of setting a pressure alarm span of the blood circuit according to the detected liquid flow of the blood circuit may include: and if the liquid flow of the blood circuit is larger than the lowest limit flow, setting the pressure alarm span of the blood circuit according to the detected liquid flow of the blood circuit.
At this time, the method further includes: and step S106.
Step S106: and if the liquid flow of the blood circuit is less than or equal to the minimum limit flow, sending out a blockage fault prompt message.
The minimum limit flow can be used as a limit for judging whether the liquid in the blood circuit flows normally, for example, the minimum limit flow is 0.5ml/min; and only when the liquid flow of the blood circuit is larger than the lowest limit flow, the liquid of the blood circuit is in a normal flowing state, and the pressure alarm span of the blood circuit is set according to the detected liquid flow of the blood circuit. When the liquid flow of the blood circuit is less than or equal to the lowest limit flow, the liquid of the blood circuit is in a blocking state, and at the moment, blocking fault prompt information is sent out, and a user can be prompted through the blocking fault prompt information: the liquid in the blood circuit is in an abnormal flow state, and a user can timely treat the abnormal flow state of the blood circuit. Therefore, the embodiment of the application can detect the blockage problem of the blood circuit in advance according to the minimum limit flow, and improve the detection efficiency and the detection precision of the liquid flowing fault in the blood circuit.
In an embodiment, the method further comprises: step S107 and step S108.
Step S107: and when the pressure detection value is not in the pressure alarm range, storing and displaying the pressure detection value.
Step S108: calibrating the pressure alarm span according to the pressure detection value.
Specifically, as shown in fig. 1, the blood purification apparatus further includes: the display screen has an information display function and an instruction input function, when the pressure detection value is not in the pressure alarm range, the pressure detection value is stored and displayed, and a user can check the pressure detection value on the display screen, so that the user can know the pressure fault state of the blood circuit in time; in addition, the pressure detection value of the blood circuit can be stored at any time so as to facilitate data query.
When a pressure alarm signal is sent out, the pressure of the blood circuit is indicated to be in fault, the pressure detection value is used as an empirical value, and the pressure alarm span can be calibrated, so that the calibrated pressure alarm span can more accurately reflect the normal pressure range of the blood circuit, and the false pressure alarm or the missing alarm of the blood circuit is reduced.
Illustratively, when the pressure alarm signal is issued, according to a manual judgment: pressure detection value at this moment is obviously in normal range, then explains that pressure alarm span sets up too narrowly, arouses the wrong report to police, calibrates pressure alarm span, and concrete calibration mode can be: the pressure alarm span is increased so that the increased pressure alarm range can cover the pressure detection value. Of course, only one of the most basic calibration methods is illustrated here, and other calibration methods, such as calibration of the pressure alarm span using an intelligent algorithm (e.g., a neural network, a genetic algorithm, etc.), may be used in the embodiments of the present application.
In an embodiment, the step S101, when it is detected that the continuous purification time of the blood purifier is equal to the first preset time, detecting the pressure of the blood circuit to obtain a standard pressure value, may include: when detecting that the continuous purification time of the blood purifier is equal to the detection time corresponding to the pipeline section of the blood circuit, detecting the pressure of the pipeline section of the blood circuit to obtain a standard pressure value of the pipeline section of the blood circuit, wherein the blood circuit is divided into different pipeline sections according to the functions of the pipeline, and each pipeline section has the detection time corresponding to the pipeline section.
In an embodiment of the application, the blood circuit is divided into different line sections according to the line function in the blood circuit. Depending on the line section of the blood circuit, a detection time corresponding to the line section can be set.
In particular, referring to fig. 2, the tubing section of the blood circuit may comprise: arterial line, venous line, anticoagulation line; in combination with the above, each line section has a specific liquid transfer function. Each line segment can also exhibit corresponding pressure fluctuation characteristics during the blood purification treatment.
In the embodiment of the present application, a corresponding detection time is set for each pipeline segment, for example, the detection time of the arterial pipeline is as follows: 3min, the detection time of the venous pipeline is as follows: 4min, the detection time of the anticoagulation pipeline is as follows: and 5min. In conjunction with the above, the "detection time corresponding to each pipeline section" herein corresponds to "the first preset time of each pipeline section". When the continuous purification time of the blood purifier is equal to 3min, the liquid flow of the arterial pipeline reaches a stable state, the detected pressure of the arterial pipeline is used as the standard pressure value of the arterial pipeline, the pressure alarm span of the arterial pipeline is set, and the pressure alarm range of the arterial pipeline is set according to the standard pressure value of the arterial pipeline and the pressure alarm span of the arterial pipeline; when the continuous purification time of the blood purifier is detected to be more than 3min, detecting the pressure of the arterial pipeline to obtain a pressure detection value of the arterial pipeline; and detecting whether the pressure detection value of the arterial pipeline is in the pressure alarm range of the arterial pipeline, and sending a pressure alarm signal when the pressure detection value of the arterial pipeline is not in the pressure alarm range of the arterial pipeline, wherein the pressure alarm signal prompts that the pressure of the arterial pipeline breaks down.
The embodiment of the application divides the blood circuit into different pipeline sections, and sets up corresponding standard pressure value to every pipeline section, and the standard pressure value of every pipeline section can reflect the reference state of every pipeline section internal pressure more accurately to whether the pressure of the pipeline section of blood circuit breaks down according to the standard pressure value in every pipeline section accurately, then make the precision of standard pressure value higher.
In an embodiment, the step S101, when it is detected that the continuous purification time of the blood purifier is equal to the detection time corresponding to the tube section of the blood circuit, detecting the pressure of the tube section of the blood circuit to obtain a standard pressure value of the tube section of the blood circuit, may further include: sub-step S1011 and sub-step S1012.
Substep S1011: when the continuous purification time of the blood purifier is detected to be equal to the detection time corresponding to the first pipeline section of the blood circuit, the pressure of the first pipeline section of the blood circuit is detected by adopting a pressure sensor, so that the standard pressure value of the first pipeline section of the blood circuit is obtained, wherein the length of the first pipeline section of the blood circuit is less than or equal to the preset pipeline length, the first pipeline section is provided with a pressure detection point, and the pressure detection point is provided with a pressure sensor.
Sub-step S1012: when the continuous purification time of the blood purifier is detected to be equal to the detection time corresponding to the second pipeline section of the blood circuit, the pressure of the second pipeline section of the blood circuit is detected by adopting at least two pressure sensors, and the average value of the pressures detected by the at least two pressure sensors is used as the standard pressure value of the second pipeline section of the blood circuit, wherein the length of the second pipeline section of the blood circuit is greater than the preset pipeline length, the second pipeline section is provided with at least two pressure detection points, and each pressure detection point is provided with one pressure sensor.
Specifically, in a blood purification process of a blood purification apparatus, different tube sections in a blood circuit generally have different lengths, for example, the length of an arterial tube is generally greater than that of an anticoagulation tube, and the length of a venous tube is generally greater than that of an arterial tube, so in order to be able to more accurately obtain a standard pressure value of the tube section, in the embodiments of the present application, a pressure detection manner of the tube section is respectively set according to the length of the tube section, when the length of a second tube section of the blood circuit is greater than a preset tube length, at least two pressure detection points are set on the second tube section, each pressure detection point is provided with one pressure sensor, and when the length of a first tube section of the blood circuit is less than or equal to the preset tube length, the first tube section is provided with one pressure detection point, and the pressure detection points are provided with one pressure sensor. For example, the preset length of the line is 0.6m, and when the length of the second line segment of the blood circuit is greater than 0.6m, at least two pressure sensors need to be disposed on the second line segment of the blood circuit, and the standard pressure value of the second line segment is obtained in the manner of average value of pressure, so as to avoid the problem that the standard pressure value has too large error due to too large length of the second line segment.
For example, if the length of the venous line is 0.7m, 0.7m >, 0.6m, two pressure detection points need to be selected on the venous line, and one pressure sensor is arranged at each pressure detection point, as shown in fig. 2, one pressure sensor is arranged at the inlet side of the venous line (i.e. near the blood output end of the blood purifier), another pressure sensor is arranged at the outlet side of the venous line (i.e. near the human body vein end), when the continuous purification time of the blood purifier is detected to be equal to the detection time corresponding to the venous line, the pressure sensor is used for detecting the pressure of the venous line, and the average value of the pressures detected by the two pressure sensors is used as the standard pressure value of the venous line; for example, the pressures detected by the two pressure sensors are respectively: 100mmHg, 150mmHg, the average is: (100 + 150)/2mmHg =125mmHg, and the standard pressure value of the venous line is as follows: 125mmHg.
If the length of the anticoagulation pipeline is 0.3m and 0.3m is 0.6m, selecting a pressure detection point on the anticoagulation pipeline, arranging a pressure sensor on the pressure detection point, as shown in fig. 2, arranging a pressure sensor at a midpoint on the anticoagulation pipeline, detecting the pressure of the anticoagulation pipeline by using the pressure sensor when the continuous purification time of the blood purifier is detected to be equal to the detection time corresponding to the anticoagulation pipeline, and taking the detected pressure of the anticoagulation pipeline as the standard pressure value of the anticoagulation pipeline; for example, the pressure detected by the pressure sensor is: and 100mmHg, the standard pressure value of the anticoagulation pipeline is as follows: 100mmHg.
The length of the pipeline section of the blood circuit has been distinguished to this application embodiment to set up different quantity's pressure sensor respectively on the pipeline section, can improve the accuracy of setting up of standard pressure value.
It should be noted that the preset pipeline length may be obtained through a plurality of technical experiments, and a specific numerical setting manner of the preset pipeline length is not described in detail here.
It should be noted that the number and positions of the pressure detection points selected on the tubing section of the blood circuit may be selected according to the operation experience, for example, when two pressure detection points are required to be disposed on the tubing section, the two pressure detection points are usually disposed on the inlet side and the outlet side of the tubing section; also, for example, when three pressure detection points are to be selected on a pipeline section, the three pressure detection points are typically located on the inlet side, the outlet side, and the midpoint of the pipeline section. The pressure change condition of the pipeline section can be accurately detected by selecting a reasonable number of pressure detection points on the pipeline section of the blood circuit; the specific number of the pressure detection points and the specific positions are not described in detail.
In an embodiment, the step S104 of issuing a pressure alarm signal when the pressure detection value is not in the pressure alarm range may include: substeps 1041 and substep S1042.
Substep S1041: when the pressure detection value is not in the pressure alarm range, determining a pressure alarm level of the blood circuit according to an absolute value of a difference value between the pressure detection value and the standard pressure value.
Substep S1042: issuing a pressure alarm message corresponding to a pressure alarm level of the blood circuit.
Specifically, this application embodiment sends different pressure alarm information according to the absolute value of the difference between pressure detection value and the standard pressure value, and the user can distinguish the pressure alarm level of blood return circuit according to pressure alarm information to the user can in time go to handle the higher fault state of pressure alarm level, and the liquid flow security in the guarantee blood return circuit brings bigger simple operation nature for blood purification process.
In an embodiment, in sub-step S1041, the determining a pressure alarm level of the blood circuit according to an absolute value of a difference between the pressure detection value and the standard pressure value may include: substep S1041A and substep S1041B.
Substep S1041A: determining a pressure alarm level of the blood circuit as a first priority if an absolute value of a difference between the detected pressure value and the standard pressure value is greater than the pressure alarm span.
Substep S1041B: determining a pressure alarm level of the blood circuit as a second priority if an absolute value of a difference between the pressure detection value and the standard pressure value is less than or equal to the pressure alarm span.
Illustratively, the pressure alarm span is 100mmHg and the standard pressure values are: 100mmHg, pressure alarm range for the blood circuit: 50mmHg to 150mmHg; when the pressure detection value of the blood circuit is as follows: 160mmHg, the pressure detection value is not in the pressure alarm range, and the difference between the pressure detection value and the standard pressure value is: (160-100) mmHg =60mmhg,60mmhg < -100mmhg, the pressure alarm levels of the blood circuits at this time are divided into second priorities, and the pressure alarm information at the second priorities is: green light is emitted to play a role in fault prompt; when the pressure detection value of the blood circuit is as follows: 210mmHg, the pressure detection value is not in the pressure alarm range, and the difference between the pressure detection value and the standard pressure value is: (210-100) mmHg =110mmHg, the pressure alarm level of the blood circuit at this time is classified into a first priority, and the pressure alarm information at the first priority is: emitting red light; the emergency degree of the faults under the first priority level is larger than the emergency degree of the faults under the second priority level, so that a user can accurately distinguish the pressure alarm level of the blood circuit according to the pressure alarm information, the pressure fault state of the blood circuit can be conveniently and timely processed, and the liquid flowing safety of the blood circuit is guaranteed.
When the absolute value of the difference value between the pressure detection value and the standard pressure value is larger than the pressure alarm span, the pressure detection value of the blood circuit is over large, the blood purification treatment safety of the patient can be seriously threatened by the fault state, and the pressure alarm grade is divided into a first priority level so as to remove the pressure fault state of the blood circuit as soon as possible; when the absolute value of the difference between the pressure detection value and the standard pressure value is less than or equal to the pressure alarm span, it is stated that: although the pressure detection value of the blood circuit is not in the pressure alarm range, the blood purification treatment safety of the patient is not immediately endangered by the fault state, but if the patient is in the fault state for a long time, the blood purification treatment safety of the patient is impaired, and the pressure alarm level is divided into a second priority level. In the embodiment of the application, each pressure alarm level and each pressure alarm information have one-to-one correspondence, the pressure alarm level of the blood circuit can be accurately distinguished according to the pressure alarm information, and greater convenience is brought to the blood purification treatment control process of the blood purification equipment.
In an embodiment, the method further comprises: step S109.
Step S109: when the continuous purification time of the blood purifier meets a first condition, detecting the pressure of the blood circuit to obtain an updated standard pressure value, wherein the first condition is as follows: and the difference value of the continuous purification time of the blood purifier and the first preset time is divided by a preset pressure updating period to be equal to n, wherein n is any positive integer.
Expressed by a mathematical formula, the first condition is as follows: (continuous purification time of the blood purifier-first preset time)/pressure update cycle = n, n is any positive integer.
Specifically, when the continuous purification time of the blood purifier is longer than a first preset time, the standard pressure value of the blood circuit needs to be updated in real time to adapt to the pressure change condition in the blood circuit; the updated pressure alarm range is set according to the pressure alarm span of the blood circuit and the updated standard pressure value, whether the pressure of the blood circuit fails or not can be judged more accurately based on the updated pressure alarm range, and the pressure failure judgment precision of the blood circuit is improved.
Illustratively, the pressure update period of the blood circuit is 10min, the first preset time is 5min, the continuous purification time of the blood purifier is equal to 5min, the pressure of the blood circuit is detected to be 100mmHg, and the standard pressure value is 100mmHg; when the continuous purification time of the blood purifier is detected to be longer than 5min, judging whether the pressure failure occurs in the blood circuit according to the pressure detection value of the blood circuit; when the continuous purification time of the blood purifier reaches 15min, (the continuous purification time of the blood purifier-the first preset time)/the pressure update period = (15-5)/10 =1), the first condition is satisfied, and the pressure of the blood circuit is detected as an updated standard pressure value, for example, the detected pressure of the blood circuit is: 90mmHg, then the updated standard pressure value is: 90mmHg; and by analogy, according to a first condition, when the continuous purification time of the blood purifier reaches: 25min, 35min, 45min, 55min …; the pressure of the blood circuit is detected to update the standard pressure value of the blood circuit. Therefore, the standard pressure value can be updated in a self-adaptive mode in the blood purification treatment process, and the pressure fault judgment error caused by the standard pressure value setting process is reduced.
In an embodiment, the method further comprises: step S110.
Step S110: determining the pressure update period as a function of a pressure alarm span of the blood circuit.
Specifically, there is a correlation between the pressure update period and the pressure alarm span, and generally, the larger the pressure alarm span is, the larger the pressure update period of the blood circuit is, because once the pressure alarm span is set to be large, the smaller the influence degree of the standard pressure value on the failure judgment accuracy of the blood circuit is, and the update frequency of the standard pressure value does not need to be too fast; depending on the pressure alarm span of the blood circuit, how to set the pressure update period of the blood circuit in particular, there are many ways in practical applications, such as: presetting a corresponding table (as shown in the following table 1), and setting a pressure updating period of the blood circuit according to the corresponding relation in the corresponding table; for example, when the pressure alarm obtained to the blood circuit spans: 100mmHg, the pressure update cycle of the blood circuit is as follows according to the correspondence in table 1: for 10min. Therefore, the pressure updating period of the blood circuit can be set in a self-adaptive mode, and the setting precision and the updating efficiency of the standard pressure value are improved.
TABLE 1
Figure BDA0003715893050000131
Figure BDA0003715893050000141
It should be noted that the correspondence in table 1 is obtained from a plurality of technical experiments, and the correspondence in table 1 is not described in too much text.
In an embodiment, the method further comprises: step S111.
Step S111: and when the pressure detection value is in the pressure alarm range and the absolute value of the difference value between the pressure detection value and the standard pressure value is larger than a preset pressure value, calibrating the standard pressure value according to the pressure detection value.
Specifically, when the pressure detection value of the blood circuit is in the pressure alarm range, it indicates that the pressure failure of the blood circuit does not occur; the preset pressure value is used for evaluating the degree of the pressure of the blood circuit deviating from the standard pressure value; when the absolute value of the difference value between the pressure detection value and the standard pressure value is greater than the preset pressure value, it is indicated that the degree of the pressure detection value deviating from the standard pressure value of the blood circuit is too large, and if it is determined that the blood circuit has no pressure fault, the set standard pressure value is unreasonable in this case, the standard pressure value needs to be calibrated according to the pressure detection value, and the calibrated standard pressure value is increased or decreased to reduce the pressure fault determination error of the blood circuit.
Illustratively, the pressure alarm ranges for the blood circuit are: 50 mmHg-150 mmHg, the standard pressure value is 100mmHg, and the preset pressure value is as follows: 30mmHg; if the pressure detection value is 120mmHg, then (120-100) mmHg =20mmHg and is less than 30mmHg, and the standard pressure value of the blood circuit does not need to be calibrated according to the pressure detection value; if the pressure detection value is 135mmHg, then (135-100) mmHg =35mmhg > <30mmhg, and although the pressure detection value is in the pressure alarm range, the absolute value of the difference between the pressure detection value and the standard pressure value is already significantly large (greater than the preset pressure value), and the difference indicates that: the standard pressure value is likely to be set unreasonably, and the standard pressure value of the blood circuit needs to be calibrated according to the pressure detection value, for example, the standard pressure value is increased, and the increased standard pressure value is: 105mmHg, pressure alarm range after blood circuit renewal is: 55-155 mmHg; therefore, whether the blood circuit has the pressure failure or not can be identified more accurately according to the updated pressure alarm range.
It should be noted that the above embodiment may be used to calibrate the pressure detection value in various ways, such as by using a neural network algorithm in the conventional technology, and so on.
In an embodiment, the method further comprises: step S112, step S113, and step S114.
Step S112: and when the continuous purification time of the blood purifier is equal to a first preset time, detecting the temperature of the liquid in the blood loop to obtain a standard temperature.
Step S113: and when the continuous purification time of the blood purifier is longer than the first preset time, detecting the temperature of the liquid in the blood circuit to obtain the detected temperature.
Step S114: and when the absolute value of the difference value between the detected temperature and the standard temperature is greater than a first preset temperature and the pressure detection value is in the pressure alarm range, taking the currently detected pressure detection value as an updated standard pressure value. Meanwhile, the liquid temperature obtained by current detection can be used as the standard temperature after updating.
Specifically, according to the common sense of fluid pressure, there is a correlation between the pressure in the blood circuit and the temperature of the fluid in the blood circuit, and when the temperature of the fluid in the blood circuit changes, the pressure in the blood circuit also changes accordingly. For example, when the temperature of the fluid in the blood circuit increases, the pressure in the blood circuit also increases, with other factors remaining unchanged; when the standard pressure value of the blood circuit is detected, the standard temperature in the blood circuit can be synchronously detected; when the continuous purification time of the blood purifier is longer than a first preset time, judging whether the liquid temperature in the blood circuit can influence the pressure fault judgment accuracy of the blood circuit or not when detecting the liquid temperature in the blood circuit; if the absolute value of the difference between the detected temperature of the liquid in the blood circuit and the standard temperature is greater than the first preset temperature, it indicates that the temperature of the liquid in the blood circuit changes suddenly, the temperature of the liquid in the blood circuit which changes suddenly exceeds the preset temperature change range, the standard pressure value detected at the standard temperature cannot accurately judge whether the pressure of the blood circuit fails, at the moment, the pressure of the blood circuit is detected again at the current liquid temperature to serve as an updated standard pressure value, and the updated standard pressure value serves as a standard value of the normal pressure of the blood circuit. Therefore, the standard pressure value can be automatically updated according to the temperature of the liquid in the blood circuit, whether the pressure fault occurs in the blood circuit is judged according to the updated pressure alarm range, the interference error caused by the temperature change of the liquid in the blood circuit to the pressure fault judgment of the blood circuit is eliminated, and the judgment precision of the pressure fault of the blood circuit is higher.
Illustratively, the first preset time is: and 5min, when the continuous purification time of the blood purifier is detected to be equal to 5min, detecting the temperature of the liquid in the blood circuit as follows: at 35 ℃, the temperature at this point is taken as the standard temperature, and at 35 ℃ the standard pressure values of the blood circuit are: 100mmHg, the pressure alarm range obtained from the standard pressure values is: 50mmHg to 150mmHg; if the continuous purification time of the blood purifier is equal to 15min, the detected temperature of the liquid in the blood circuit is detected as follows: 39 ℃ if, as a result of a plurality of tests: the first preset temperature is 3 ℃, and | =4 ℃ to | >3 ℃ under |39 ℃ -35 ℃, then the following are obtained: when the temperature of the liquid in the blood circuit is suddenly changed, the standard pressure value of the blood circuit needs to be detected again at 39 ℃, for example, the standard pressure value obtained by detecting again is: 105mmHg, the updated standard pressure value is 105mmHg, and the updated pressure alarm range is: 55 mmHg-155 mmHg, and the updated standard temperature is 39 ℃; and judging whether the pressure failure occurs in the blood circuit according to the updated pressure alarm range in the blood purification treatment process at a later date.
It should be noted that the first preset temperature can be summarized according to a plurality of experiments. When the standard pressure value is updated, the standard temperature is also updated according to the embodiment of the application, and the liquid temperature in the blood circuit obtained by current detection is used as the updated standard temperature.
Referring to fig. 5, fig. 5 is a schematic structural diagram of another embodiment of the blood purification apparatus of the present application, the blood purification apparatus comprising: a blood circuit 1 and a blood purifier 2, wherein the blood circuit 1 is used for conveying liquid, the blood purifier 2 is connected in series in the blood circuit 1, and the blood purifier 2 is used for purifying blood; the blood purification apparatus further includes: a memory 200 and a processor 300, the memory 200 being for storing a computer program; the processor 300 is configured to execute the computer program and, when executing the computer program, implement the method for detecting a pressure failure in a blood purification apparatus as described in any one of the above. For a detailed description of the related contents, please refer to the related contents of the pressure failure detection method of the blood purification apparatus described above, which will not be redundantly described here.
Wherein the blood purification apparatus further comprises a main unit 100, and the blood circuit 1 and the blood purifier 2 are mounted on the main unit 100. The memory 200 and the processor 300 are connected by a bus, and the memory 200 and the processor 300 may be provided in the host 100 or may be provided outside the host 100.
The processor 300 may be a micro-control unit, a central processing unit, a digital signal processor, or the like.
The memory 200 may be a Flash chip, a read-only memory, a magnetic disk, an optical disk, a usb disk, or a removable hard disk, among others.
The present application also provides a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to implement the pressure failure detection method of a blood purification apparatus as described in any one of the above. For a detailed description of the related contents, please refer to the related contents of the pressure failure detection method of the blood purification apparatus described above, which will not be redundantly described here.
The computer readable storage medium may be an internal storage unit of the blood purification apparatus, such as a hard disk or a memory. The computer readable storage medium may also be an external storage device such as a hard drive equipped with a plug-in, smart memory card, secure digital card, flash memory card, or the like.
It is to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
The above description is only for the specific embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A blood purification apparatus, characterized in that it comprises: a blood circuit for transporting a liquid and a blood purifier connected in series in the blood circuit for purifying blood; the blood purification apparatus further includes: a memory for storing a computer program and a processor; the processor is configured to execute the computer program and, when executing the computer program, implement a pressure failure detection method of a blood purification apparatus as follows:
when the continuous purification time of the blood purifier is detected to be equal to a first preset time, detecting the pressure of the blood circuit to obtain a standard pressure value;
determining a pressure alarm range of the blood circuit according to the standard pressure value;
when the continuous purification time of the blood purifier is detected to be longer than the first preset time, detecting the pressure of the blood circuit to obtain a pressure detection value;
and determining whether the pressure of the blood circuit is failed according to the pressure detection value and the pressure alarm range.
2. A blood purification apparatus according to claim 1, wherein the processor, when executing the computer program, implements a pressure failure detection method of a blood purification apparatus as follows:
when the pressure detection value is not in the pressure alarm range, determining that the pressure of the blood circuit is in fault, and sending a pressure alarm signal;
and/or the presence of a gas in the gas,
and determining the pressure alarm range of the blood circuit according to the standard pressure value and a preset pressure alarm span.
3. A blood purification apparatus according to claim 2, wherein the processor, when executing the computer program, implements a pressure failure detection method of a blood purification apparatus as follows:
setting a pressure alarm span of the blood circuit as a function of the detected liquid flow of the blood circuit;
and/or the presence of a gas in the atmosphere,
when the pressure detection value is not in the pressure alarm range, storing and displaying the pressure detection value;
calibrating the pressure alarm span according to the pressure detection value.
4. A blood purification apparatus according to claim 3, wherein the processor, when executing the computer program, implements a pressure failure detection method of a blood purification apparatus as follows:
if the liquid flow of the blood circuit is larger than the lowest limit flow, setting the pressure alarm span of the blood circuit according to the detected liquid flow of the blood circuit;
and/or the presence of a gas in the gas,
and if the liquid flow of the blood circuit is less than or equal to the minimum limit flow, sending out a blockage fault prompt message.
5. A blood purification apparatus according to claim 1, wherein the processor, when executing the computer program, implements a pressure failure detection method of a blood purification apparatus as follows:
when detecting that the continuous purification time of the blood purifier is equal to the detection time corresponding to the pipeline section of the blood circuit, detecting the pressure of the pipeline section of the blood circuit to obtain a standard pressure value of the pipeline section of the blood circuit, wherein the blood circuit is divided into different pipeline sections according to the functions of the pipeline, and each pipeline section has the detection time corresponding to the pipeline section.
6. A blood purification apparatus according to claim 5, wherein the processor, when executing the computer program, implements a pressure failure detection method of a blood purification apparatus as follows:
when detecting that the continuous purification time of the blood purifier is equal to the detection time corresponding to the first pipeline section of the blood circuit, detecting the pressure of the first pipeline section of the blood circuit by using a pressure sensor to obtain a standard pressure value of the first pipeline section of the blood circuit, wherein the length of the first pipeline section of the blood circuit is less than or equal to the preset pipeline length, the first pipeline section is provided with a pressure detection point, and the pressure detection point is provided with a pressure sensor;
when the continuous purification time of the blood purifier is detected to be equal to the detection time corresponding to the second pipeline section of the blood circuit, the pressure of the second pipeline section of the blood circuit is detected by adopting at least two pressure sensors, and the average value of the pressures detected by the at least two pressure sensors is used as the standard pressure value of the second pipeline section of the blood circuit, wherein the length of the second pipeline section of the blood circuit is greater than the preset pipeline length, the second pipeline section is provided with at least two pressure detection points, and each pressure detection point is provided with one pressure sensor.
7. A blood purification apparatus according to claim 2, wherein the processor, when executing the computer program, implements a pressure failure detection method of a blood purification apparatus as follows:
when the pressure detection value is not in the pressure alarm range, determining the pressure alarm level of the blood circuit according to the absolute value of the difference value between the pressure detection value and the standard pressure value;
emitting pressure alarm information corresponding to a pressure alarm level of the blood circuit.
8. A blood purification apparatus according to claim 7, wherein the processor, when executing the computer program, implements a pressure failure detection method of a blood purification apparatus as follows:
determining a pressure alarm level of the blood circuit as a first priority if an absolute value of a difference between the pressure detection value and the standard pressure value is greater than the pressure alarm span;
determining a pressure alarm level of the blood circuit as a second priority if an absolute value of a difference between the pressure detection value and the standard pressure value is less than or equal to the pressure alarm span.
9. A blood purification apparatus according to claim 1, wherein the processor, when executing the computer program, implements a pressure failure detection method of a blood purification apparatus as follows:
when the continuous purification time of the blood purifier meets a first condition, detecting the pressure of the blood circuit to obtain an updated standard pressure value, wherein the first condition is as follows: the difference value between the continuous purification time of the blood purifier and the first preset time is divided by a preset pressure updating period to be equal to n, wherein n is any positive integer;
and/or the presence of a gas in the gas,
when the continuous purification time of the blood purifier is equal to the first preset time, detecting the temperature of the liquid in the blood circuit to obtain a standard temperature;
when the continuous purification time of the blood purifier is longer than the first preset time, detecting the temperature of liquid in the blood loop to obtain a detected temperature;
when the absolute value of the difference value between the detected temperature and the standard temperature is larger than a first preset temperature and the pressure detection value is in the pressure alarm range, taking the currently detected pressure detection value as an updated standard pressure value;
and/or the presence of a gas in the gas,
and when the pressure detection value is in the pressure alarm range and the absolute value of the difference value between the pressure detection value and the standard pressure value is larger than a preset pressure value, calibrating the standard pressure value according to the pressure detection value.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, causes the processor to implement the pressure failure detection method of a blood purification apparatus according to any one of claims 1 to 9.
CN202210736876.7A 2022-06-27 2022-06-27 Blood purification apparatus and storage medium Pending CN115252933A (en)

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