An extracorporeal circulation tubing flow velocity testing device

Abstract

This utility model discloses an extracorporeal circulation tubing flow rate testing device, belonging to the field of medical devices. It includes a detection liquid container, an inlet pipe connected to the outlet of the detection liquid container, a proportional valve and a front connector sequentially arranged on the inlet pipe, the front connector connected to a rear connector via a test pipe, the test pipe being connected to a peristaltic pump, and the end of the rear connector furthest from the peristaltic pump connected to a flow meter. An outlet pipe is connected to the inlet of the detection liquid container, the rear connector and the flow meter are located on the outlet pipe, and a pressure sensor is installed between the proportional valve and the front connector. This utility model is equipped with a proportional valve, which can accurately control the amount of liquid entering the detection liquid container. The pressure sensor between the proportional valve and the front connector can monitor and record pressure changes in real time during the test, providing strong support for data analysis. Through the cooperation of the proportional valve and the pressure sensor, the flow rate of the tubing can be tested under different pressure conditions.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and more specifically, relates to an extracorporeal circulation tubing flow rate testing device. Background Technology

[0002] Blood purification is a process that uses technology to remove waste, toxins, and abnormal substances from the blood to achieve blood purification. Extracorporeal circulation tubing is used in blood purification medical treatments; blood purification therapies (such as hemodialysis) rely on the stable operation of the extracorporeal circulation circuit. The pump tubing, as the core component driving blood flow, directly affects the safety and effectiveness of the treatment due to its flow rate accuracy. In clinical practice, the pump tubing needs to operate in a variable pressure environment (especially negative pressure). If its performance is substandard, it may lead to excessive flow rate deviation, thereby causing risks such as coagulation, hemolysis, or inaccurate treatment dosage. The pump tubing performance testing method in YY0267-2016 requires that the relative deviation of the pump tubing flow rate not exceed 10%.

[0003] The current industry practice is to manually adjust the size of the blood inlet and outlet to regulate the pressure at the inlet. However, manual adjustment results in large pressure fluctuations and poor reproducibility, which makes it difficult to evaluate product performance. Utility Model Content

[0004] The main purpose of this invention is to provide an extracorporeal circulation pipeline flow rate testing device that can accurately control the amount of liquid entering the pipeline, achieve precise and effective control of the inlet pressure, and accurately test the pipeline flow rate under different pressure conditions.

[0005] According to a first aspect of the present invention, an extracorporeal circulation pipeline flow rate testing device is provided, comprising a detection liquid container, an inlet pipeline connected to the outlet of the detection liquid container, a proportional valve and a front connector sequentially arranged on the inlet pipeline, the front connector being connected to a rear connector via a pipeline to be tested, the pipeline to be tested being connected to a peristaltic pump, the end of the rear connector away from the peristaltic pump being connected to a flow meter, an outlet pipeline connected to the inlet of the detection liquid container, the rear connector and the flow meter being arranged on the outlet pipeline, and a pressure sensor being arranged between the proportional valve and the front connector.

[0006] According to the extracorporeal circulation pipeline flow rate testing device of the first aspect of the present invention, the proportional valve, pressure sensor, peristaltic pump and flow meter are all connected to an intelligent control device, which is used for parameter setting, operation control and result display.

[0007] According to the extracorporeal circulation pipeline flow rate testing device of the first aspect of the present invention, the intelligent control device is provided with a touch-operable display screen.

[0008] According to the extracorporeal circulation pipeline flow rate testing device of the first aspect of the present invention, the detection liquid container is configured as a magnetically stirred water bath.

[0009] According to the extracorporeal circulation pipeline flow rate testing device of the first aspect of the present invention, both the front connector and the rear connector are self-sealing connectors with detachable structures.

[0010] According to the extracorporeal circulation pipeline flow rate testing device of the first aspect of the present invention, the rear end of the flow meter is connected to a detection liquid outlet, the other end of the detection liquid outlet is connected to the inlet of the detection liquid container, and the detection liquid outlet is disposed on the liquid outlet pipeline.

[0011] According to the extracorporeal circulation pipeline flow rate testing device of the first aspect of the present invention, the outlet of the detection liquid container is connected to the detection liquid inlet, the other end of the detection liquid inlet is connected to the front end of the proportional valve, and the detection liquid inlet is arranged on the inlet pipeline.

[0012] According to the extracorporeal circulation pipeline flow rate testing device of the first aspect of the present invention, the rear end of the proportional valve is connected to the front end of the front connector, the rear end of the front connector is connected to one end of the pipeline to be tested, the other end of the pipeline to be tested is connected to the front end of the rear connector, and the rear end of the rear connector is connected to the front end of the flow meter.

[0013] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects: This utility model is equipped with a proportional valve, which can accurately control the amount of liquid entering the test liquid container. A pressure sensor is installed between the proportional valve and the front connector, which can monitor and record the pressure changes during the test in real time, providing strong support for data analysis. Through the cooperation of the proportional valve and the pressure sensor, the flow rate of the test pipeline can be measured under different pressure conditions. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the extracorporeal circulation pipeline flow rate testing device in the first embodiment of this utility model. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements, an indirect connection, or an interaction between two elements.

[0020] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0021] Reference Figure 1 As shown, an extracorporeal circulation tubing flow rate testing device is provided, including a detection liquid container 1. The outlet of the detection liquid container 1 is connected to an inlet pipe 11. A proportional valve 2 and a front connector 3 are sequentially arranged on the inlet pipe 11. The front connector 3 is connected to a rear connector 4 through a test pipe 12. The test pipe 12 is connected to a peristaltic pump 5. The end of the rear connector 4 away from the peristaltic pump 5 is connected to a flow meter 6. The inlet of the detection liquid container 1 is connected to an outlet pipe 13. The rear connector 4 and the flow meter 6 are arranged on the outlet pipe 13. A pressure sensor 7 is arranged between the proportional valve 2 and the front connector 3.

[0022] In this embodiment, the test liquid is added to the test liquid container 1 and flows into the inlet pipe 11 through the outlet of the test liquid container 1. It then passes through the proportional valve 2, and the inlet volume of the inlet pipe 11 can be precisely controlled by adjusting the proportional valve 2. Next, it flows through the front connector 3 to the test pipe 12. The test pipe 12 is then inserted into the pump head slot of the peristaltic pump 5 according to specifications, ensuring that the test pipe 12 fits the track without twisting or kinking. Finally, the other end of the test pipe 12 is connected to the rear connector 4, completing the connection with the downstream testing unit. The flow rate of the outlet pipe 13 can be measured by the flow meter 6 at the rear end of the rear connector 4. Simultaneously, a pressure sensor 7 is installed between the proportional valve 2 and the front connector 3, which can monitor and record pressure changes during the test in real time, providing strong support for data analysis. The flow rate of the test pipe can be measured under different pressure conditions through the cooperation of the proportional valve 2 and the pressure sensor 3.

[0023] After completing the connection of all components, the sealing of each interface (front connector 3, rear connector 4, and the connection between the pipeline under test 12 and the peristaltic pump 5) is checked (this can be done by manually pressing the pipeline lightly or briefly running the peristaltic pump under no-load to confirm that there is no risk of liquid leakage or air backflow, so as to avoid affecting the accuracy of subsequent flow data due to sealing failure).

[0024] Gradually adjust the electrical signal input parameters of proportional valve 2 and observe the changes in the pressure reading of the pipeline in real time until the pressure gauge stably displays a maximum pressure value of 33.3 kPa (which can be used to stably measure the flow rate of the pipeline 12 under different pressure conditions at other pressure values), and maintain this pressure state.

[0025] In some embodiments of this invention, the proportional valve 2, pressure sensor 7, peristaltic pump 5, and flow meter 6 are all connected to the intelligent control device 8. The intelligent control device 8 is used for parameter setting, operation control, and result display. The stabilization time is input to the intelligent control device 8 as 10 minutes, and the test time as 3 minutes. After the system's maximum pressure stabilizes at 33.3 kPa, it is maintained for 10 minutes. The flow meter 6 is then activated to record data for 3 minutes, continuously collecting the actual fluid flow rate under this operating condition. Simultaneously, the rotational speed parameters of the peristaltic pump 5 are recorded, providing core data support for subsequent analysis of the flow stability and delivery efficiency of the pipeline under test 12 at specified pressures and rotational speeds.

[0026] Furthermore, the intelligent control device 8 is equipped with a touch-operated display screen, which makes it convenient for users to input parameters and observe data changes.

[0027] In some embodiments of this utility model, the test liquid container 1 is set as a magnetically stirred water bath, which can precisely control the temperature and heat evenly, so that the test liquid can be mixed efficiently and at the same time prevent precipitation. It is suitable for multiple application scenarios, has diverse functions, and is energy-saving and environmentally friendly.

[0028] In some embodiments of this utility model, the front connector 3 and the rear connector 4 are both detachable self-sealing connectors. The front connector 3 and the rear connector 4 can be various types of interfaces such as locking connectors, dialysis connectors, and female connectors, so as to realize reliable docking between the front connector 3, the rear connector 4 and the peristaltic pump 5.

[0029] In some embodiments of this utility model, the flow meter 6 is connected to a detection liquid outlet 61 at its rear end, and the other end of the detection liquid outlet 61 is connected to the inlet of the detection liquid container 1. The detection liquid outlet 61 is set on the liquid outlet pipeline 13.

[0030] In some embodiments of this utility model, the outlet of the detection liquid container 1 is connected to the detection liquid inlet 14, and the other end of the detection liquid inlet 14 is connected to the front end of the proportional valve 2. The detection liquid inlet 14 is provided on the liquid inlet pipe 11.

[0031] In some embodiments of this utility model, the rear end of the proportional valve 2 is connected to the front end of the front connector 3, the rear end of the front connector 3 is connected to one end of the pipeline to be tested 12, the other end of the pipeline to be tested 12 is connected to the front end of the rear connector 4, and the rear end of the rear connector 4 is connected to the front end of the flow meter 6.

[0032] This utility model is equipped with a proportional valve 2 for precise control of the liquid inlet volume; it is easy to operate, featuring a programmable intelligent control device and a touch screen, allowing users to easily set parameters, control operations, and display results. It also supports Chinese and English menu displays for ease of use by domestic and international users; it provides real-time monitoring and recording, with a built-in high-precision pressure sensor 7 capable of monitoring and recording pressure changes during the testing process, providing strong support for data analysis; it supports automated testing, with the device supporting automatic testing by setting parameters, greatly reducing the tediousness of manual operation and improving testing efficiency; and it features real-time display of test data and a printout function, facilitating data analysis and recording for users.

[0033] The above is a further detailed description of this utility model and should not be considered as a limitation on the specific implementation of this utility model. For those skilled in the art, simple deductions or substitutions without departing from the concept of this utility model are all within the protection scope of this utility model.

Claims

1. An extracorporeal circulation tubing flow rate testing device, comprising a detection liquid container (1), characterized in that, The outlet of the detection liquid container (1) is connected to an inlet pipe (11). A proportional valve (2) and a front connector (3) are sequentially arranged on the inlet pipe (11). The front connector (3) is connected to the rear connector (4) through the test pipe (12). The test pipe (12) is connected to the peristaltic pump (5). The end of the rear connector (4) away from the peristaltic pump (5) is connected to the flow meter (6). The inlet of the detection liquid container (1) is connected to an outlet pipe (13). The rear connector (4) and the flow meter (6) are arranged on the outlet pipe (13). A pressure sensor (7) is arranged between the proportional valve (2) and the front connector (3).

2. The extracorporeal circulation tubing flow velocity testing device according to claim 1, characterized in that, The proportional valve (2), pressure sensor (7), peristaltic pump (5) and flow meter (6) are all connected to the intelligent control device (8), which is used for parameter setting, operation control and result display.

3. The extracorporeal circulation tubing flow velocity testing device according to claim 2, characterized in that, The intelligent control device (8) is equipped with a touch-operable display screen.

4. The extracorporeal circulation tubing flow velocity testing device according to claim 1, characterized in that, The test liquid container (1) is configured as a magnetically stirred water bath.

5. The extracorporeal circulation tubing flow velocity testing device according to claim 1, characterized in that, Both the front connector (3) and the rear connector (4) are detachable self-sealing connectors.

6. The extracorporeal circulation tubing flow velocity testing device according to claim 1, characterized in that, The flow meter (6) is connected to a detection liquid outlet (61) at its rear end. The other end of the detection liquid outlet (61) is connected to the inlet of the detection liquid container (1). The detection liquid outlet (61) is located on the liquid outlet pipeline (13).

7. The extracorporeal circulation tubing flow velocity testing device according to claim 1, characterized in that, The outlet of the detection liquid container (1) is connected to the detection liquid inlet (14), and the other end of the detection liquid inlet (14) is connected to the front end of the proportional valve (2). The detection liquid inlet (14) is located on the liquid inlet pipeline (11).

8. The extracorporeal circulation tubing flow velocity testing device according to claim 1, characterized in that, The rear end of the proportional valve (2) is connected to the front end of the front connector (3), the rear end of the front connector (3) is connected to one end of the pipeline to be tested (12), the other end of the pipeline to be tested (12) is connected to the front end of the rear connector (4), and the rear end of the rear connector (4) is connected to the front end of the flow meter (6).

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