Portable artificial kidney system bubble detection and injection blockage judgment unit

Abstract

The present invention discloses a bubble detection and injection blockage judgment unit for a portable artificial kidney circulation system. During the preparation of the circulating liquid, the flow rate value of the power module is set to V set , the sensor module detects the liquid flow rate in the unit passage in real time, and the control module reads the value V of the sensor module once per second i , and calculates the difference #imgabs0# for the adjacent sensor values V i 、V i+1 read, and compares the difference of #imgabs1#V set with the acceptable flow error σ for judgment: (1) If #imgabs2# there are no bubbles in the liquid in the unit passage, the execution module can inject the liquid in the unit passage into the subsequent processing device; (2) If #imgabs3# there are bubbles in the liquid in the unit passage and it cannot be injected into the subsequent processing device, the execution module discharges the liquid and injects it into the passage; (3) If for 30 consecutive seconds #imgabs4# then there is a fault in the power module or sensor module in the injection passage, and the injection is paused; (4) If #imgabs5# then the injection passage is blocked. The present invention can accurately judge whether there are bubbles in the pure water and whether the injection passage is blocked by reading and analyzing the flow rate of the injection passage of the circulating liquid preparation device of the portable artificial kidney system in real time and comparing it with the flow rate value of the power module

Description

Technical Field

[0001] The invention relates to an artificial kidney system, in particular to a portable artificial kidney system bubble detection and injection blockage judgment unit. Background Art

[0002] As a country with a large population, China currently has 120 million people suffering from kidney diseases at various stages, and about 3 million patients with end-stage renal disease. The means of treating end-stage renal disease include kidney transplantation, hemodialysis and peritoneal dialysis. Kidney transplantation is limited by the number of kidney donors, and the transplantation rate is not high; hemodialysis is currently the main means of treatment in China, but the cost of hemodialysis is high, and it requires treatment in the hospital three times a week, which occupies a lot of medical resources. Compared with hemodialysis, peritoneal dialysis has the same therapeutic effect, and has the advantages of saving medical resources and reducing costs. It mainly uses the human peritoneum as a semi-permeable membrane to remove excess water, metabolites and toxins in the body, so as to achieve the purpose of blood purification and kidney replacement.

[0003] Although peritoneal dialysis treatment has many advantages such as "home treatment, in-hospital management", improving the social return rate of patients, and saving medical resources, the patient treatment method is fixed and the peritoneal dialysis fluid used in the prescription is relatively single, which cannot meet the diverse and complex treatment needs of patients, and the prescription cannot be adjusted in real time, resulting in the inability to more effectively guarantee the adequacy of dialysis treatment. In addition, the treatment process requires the use of disposable tubing and a large amount of dialysis fluid, and there are also high requirements for the cleanliness of the environment, which restricts the patient's freedom and cannot meet the patient's daily needs such as business trips and travel.

[0004] Portable or wearable artificial kidneys, which have developed rapidly in recent years, have the characteristics of small size, light weight, and flexible and diverse treatment prescriptions. Patients can wear or carry them on their bodies, which can greatly solve the problem of travel difficulties for kidney patients.

[0005] During the treatment process, the portable artificial kidney system needs to purify the dialysis waste liquid into pure water, and then prepare the pure water into dialysis fluid through a circulating fluid preparation device. If the pure water injected into the circulating fluid preparation device contains bubbles, it may cause inaccurate dialysis fluid preparation ratio, ultimately leading to insufficient treatment of the patient, and in severe cases, threatening the patient's life. Therefore, one of the key safety technical indicators of the portable artificial kidney system is to be able to accurately detect whether there are bubbles in the pure water injected into the circulating fluid preparation device. Summary of the invention

[0006] The object of the present invention is to provide a portable artificial kidney system bubble detection and injection blockage judgment unit.

[0007] The technical solution for achieving the purpose of the present invention is: a portable artificial kidney system bubble detection and injection blockage judgment unit, including a power module, a sensor module, a control module and an execution module. The power module maintains the flow of liquid in the entire unit passage, the sensor module detects the flow rate of the liquid in the unit passage in real time, the control module makes relevant judgments and then sends control information to the power module and the execution module, and the execution module controls the flow direction of the liquid in the unit passage according to the control information of the control module.

[0008] The specific judgment process of the control unit is as follows:

[0009] Step 1: Set or read the flow rate V of the power module that has been set set ;

[0010] Step 2: Read the value V of the sensor module once a second i ;

[0011] Step 3:

[0012] Step 4: Judgement Is it equal to 0?

[0013] 1) If If this continues for 30 seconds, the injection passage is blocked and the control power module stops working;

[0014] 2) If The liquid flows in the wrong direction, and the control power module stops working;

[0015] 3) If Then execute step 5;

[0016] Step 5: Right V set The difference is compared with the acceptable flow error σ to determine:

[0017] 1) If There are no bubbles in the liquid in the unit passage, and the injection operation can be carried out;

[0018] 2) If There are bubbles in the liquid in the unit channel and it cannot be injected. The liquid in the unit channel needs to be discharged and injected into the channel;

[0019] 3) If If this continues for 30 seconds, the power module or sensor module fails and the injection is suspended;

[0020] Compared with the prior art, the present invention has the following significant advantages: the present invention realizes a portable artificial kidney system bubble detection and injection blockage judgment unit, detects whether the pure water injected into the circulating fluid device in the portable artificial kidney system contains bubbles, and can also realize intelligent judgment of whether the injection passage is blocked. The algorithm is fast and effective, which can provide guarantee for the safety of artificial kidney treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the bubble detection and judgment unit.

[0022] Figure 2 This is a control module judgment flow chart of the present invention.

[0023] Figure 3 It is a schematic diagram of a specific embodiment of a portable artificial kidney bubble detection and judgment unit.

[0024] Figure 4 Schematic diagram of a portable artificial kidney circulation device. DETAILED DESCRIPTION

[0025] Combination Figure 1 The bubble detection and judgment unit is mainly composed of four modules, namely the power module, sensor module, execution module and control module. The solid line in the figure represents the liquid flow direction, and the dotted line represents the information flow direction. The power module mainly provides a power source for the liquid in the entire unit passage. The liquid is sucked by the power module and then injected into the subsequent processing unit. The sensor module mainly detects the flow rate of the liquid in the unit passage in real time. The execution module mainly controls the flow direction of the liquid in the unit passage according to the control information sent by the control module. The control module makes relevant judgments based on the real-time information fed back by the power module and the sensor module, and then controls the power module and the execution module.

[0026] like Figure 2 As shown, the judgment process of the control module is as follows:

[0027] Step 1: Set or read the flow rate V of the power module that has been set set ;

[0028] Step 2: Read the value V of the flow sensor module once a second i ;

[0029] Step 3:

[0030] Step 4: Judgement

[0031] 1) If If this continues for 30 seconds, the injection passage is blocked and the control power module stops working;

[0032] 2) If The liquid flows in the wrong direction, and the control power module stops working;

[0033] 3) If Then execute step 5;

[0034] Step 5: Right V set The difference is compared with the acceptable flow error σ to determine:

[0035] 1) If There are no bubbles in the liquid in the unit passage, and the injection operation can be carried out;

[0036] 2) If There are bubbles in the liquid in the unit channel and it cannot be injected. The liquid in the unit channel needs to be discharged and injected into the channel;

[0037] 3) If If this continues for 30 seconds, the power module or sensor module is faulty and injection is suspended.

[0038] Combination Figure 3 Through the circulating liquid bubble detection and injection blockage judgment unit in the portable artificial kidney system of the present invention, it is possible to detect whether there are bubbles in the pure water injected into the circulating liquid device in the portable artificial kidney system and to judge whether the injection path is blocked.

[0039] For example: Pure water injection stage:

[0040] Step 1: Read the peristaltic pump flow rate V set by the system set The flow rate is 5 ml / s, and the acceptable flow error is set to σ = 0.5;

[0041] Step 2: Read the flow sensor values ​​at the 5th and 6th seconds, which are 25.2ml and 29.29ml respectively.

[0042] Step 3: The injection passage is not blocked;

[0043] Step 4: Calculation Less than the acceptable flow error σ = 0.5, no bubbles exist in the circulating fluid, and injection can be carried out;

[0044] Step 4: Read the flow sensor values ​​at 150s and 151s, which are 750.4ml and 754.1ml respectively.

[0045] Step 5: It is not within the acceptable flow error range of σ = 0.5. There are bubbles in the circulating fluid, so it cannot be injected and is discharged from the injection passage;

[0046] Step 6: Read the flow sensor values ​​at 200s and 201s as 1000ml and 1000ml respectively. If the circulating fluid is not injected completely, continue to read the sensor flow rate values ​​at 202s, 203s, 204s, 205s, ... 230s, and calculate i=201,202,203,…,229, injection passage is blocked, injection is suspended and an alarm is sounded.

[0047] Figure 3 The present invention is a schematic diagram of a specific implementation example of a portable artificial kidney system bubble detection and injection blockage judgment unit. The peristaltic pump 1 provides power to inject the pure water in the pipeline 101 into the circulating liquid device through the injection channel 102. At this time, the three-way valve 3 opens the injection channel. During the injection process, if the bubble sensor 2 detects that there are bubbles in the pure water, the three-way valve 3 closes the injection channel 102 and opens the discharge channel 103 to discharge the pure water with bubbles into the waste liquid storage device. If the unit detects that the pipeline is blocked, the peristaltic pump 1 is controlled to stop working.

[0048] Figure 4 It is a schematic diagram of a specific implementation example of the present invention. When the waste liquid in the artificial kidney needs to be circulated, the three-way valve 1 opens the channel 101 to drain the waste liquid into the waste liquid storage device 2. After the drainage is completed, the booster pump 3 starts to work and pumps the waste liquid into the toxin removal device 4 through the 102 pipeline. After passing through the toxin removal device, the waste liquid is purified into pure water and enters the bubble detector injection blockage judgment unit 5 through the pipeline 103. If the unit detects the presence of bubbles, the pure water with bubbles is discharged into the waste liquid storage device 2 through the pipeline 105, and the bubbles are removed by the bubble discharge device in the waste liquid storage device 2. If the pipeline is blocked, the peristaltic pump in the bubble detector injection blockage judgment unit 5 is controlled to stop working. If everything is normal, the pure water enters the circulating liquid preparation device through the pipeline 104. The supplement device 6 adds the dialysate nutrients to the circulating liquid preparation device through accurate calculation. After the circulating liquid is prepared, it is injected into the subsequent processing unit through the 106 pipeline.

Claims

1. A portable artificial kidney system bubble detection and injection blockage judgment unit, characterized in that: It includes a power module, a sensor module, a control module and an execution module, wherein: The power module is used to maintain the power source of the entire unit passage, and its flow rate value is read and set by the control unit; A sensor module, used for measuring the flow value passing through the unit passage; The control module reads the flow rate value of the power module and the flow value of the sensor module, and controls the execution module and the power module through relevant calculations; The execution module controls the flow direction of the liquid in the cell passage according to the control information of the control module; The control module sets or reads the flow rate V of the liquid in the power module set , and read the flow value V of the flow sensor module once per second i , and then based on the difference of the sensor values ​​read adjacently Make judgments; If continuous Then the injection passage is blocked and the control power module stops working; like Then the pure water flows in the wrong direction, and the control power module stops working; like then V set The difference is compared with the acceptable flow error σ; like There are no bubbles in the unit passage, and the injection operation can be performed; if There are bubbles in the circulating fluid and it cannot be injected. The liquid in the unit channel needs to be discharged and injected into the channel. If the power module or sensor module fails, injection will be suspended.

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