An extracorporeal circulation tubing capacity testing device

Abstract

This utility model discloses an extracorporeal circulation tubing capacity testing device, belonging to the field of medical devices. It includes a test fluid storage device, the outlet of which is connected to a first pipeline. The first pipeline is sequentially equipped with a solenoid valve, a first pump body, a first flow meter, and a front connector. The outlet of the front connector is connected to a test pipeline, the other end of which is connected to a rear connector. The outlet of the rear connector is connected to a second pipeline, the other end of which is connected to the inlet of the test fluid storage device. A second sensor is installed on the second pipeline. This utility model integrates the test pipeline into the device, enabling automatic testing of blood circuit capacity, reducing manual operation, simplifying the testing process, minimizing human error, and resulting in more accurate test results.

Description

Technical Field

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

[0002] Blood purification is a process that uses technology to remove waste products, toxins, and abnormal substances from the blood to achieve blood purification. Extracorporeal circulation tubing is used in blood purification procedures; blood volume, as a key parameter of the extracorporeal circulation system, plays a significant role in clinical application. For example, the dosage of anticoagulants (such as heparin) needs to be adjusted according to blood volume to prevent blood clotting and bleeding risks. Children and low-weight patients are more sensitive to extracorporeal blood volume; excessive blood volume can lead to hypovolemic shock or hemodynamic instability. The appropriate selection of blood system volume, minimizing harm, zero residual blood management, and the calculation of drug concentrations before and after treatment all depend on the understanding of complete extracorporeal blood volume.

[0003] Currently, blood volume can be measured using the following methods: weighing method and perfusion / volume recovery method.

[0004] 1. Weighing method Operating procedure: Before blood purification begins, prefill all blood lines, filters, etc. with an equal amount of physiological saline or heparinized saline, remove air, and then weigh them.

[0005] Calculation method: Total blood circuit volume = total weight of blood circuit after pre-filling - weight of empty tube and drying device, converted to volume (ml) using temperature and density.

[0006] Advantages: Simple and convenient, commonly used for routine checks of hemodialysis machines.

[0007] Limitations: The error varies with the weighing accuracy and is not sensitive to small-capacity circuits.

[0008] 2. Injection method / capacity recovery method Operating procedure: Drain all the infused saline solution from the blood circuit tubing and filter, collect the solution, and measure the volume to determine the blood circuit capacity.

[0009] Advantages: Simple and easy to operate.

[0010] Limitations: Slight errors may occur due to incomplete collection of pipeline residues. Utility Model Content

[0011] The main purpose of this invention is to provide an extracorporeal circulation tubing capacity testing device that reduces manual operation, thereby reducing human error and making the test results more accurate.

[0012] According to a first aspect of the present invention, an extracorporeal circulation tubing capacity testing device is provided, comprising a test fluid storage device, the outlet of the test fluid storage device being connected to a first pipeline, the first pipeline being sequentially provided with a solenoid valve, a first pump body, a first flow meter and a front connector, the outlet of the front connector being connected to a test pipeline, the other end of the test pipeline being connected to a rear connector, the outlet of the rear connector being connected to a second pipeline, the other end of the second pipeline being connected to the inlet of the test fluid storage device, and a second sensor being provided on the second pipeline.

[0013] According to the extracorporeal circulation pipeline capacity testing device of the first aspect of the present invention, the solenoid valve, the first pump body, the first flow meter and the second sensor are all connected to an intelligent control device, which facilitates user parameter setting, operation control and result display.

[0014] According to the extracorporeal circulation pipeline capacity testing device of the first aspect of the present invention, a first sensor is provided between the first flow meter and the front connector, the first sensor is provided on the first pipeline, and the first sensor is connected to the intelligent control device.

[0015] According to the extracorporeal circulation tubing capacity testing device of the first aspect of the present invention, the second tubing is further provided with a second flow meter and a detection liquid outlet. The inlet of the second flow meter is connected to the outlet of the rear connector, the outlet of the second flow meter is connected to the detection liquid outlet, the other end of the detection liquid outlet is connected to the inlet of the detection liquid storage device through the second tubing, and the second flow meter is connected to the intelligent control device.

[0016] According to the extracorporeal circulation tubing capacity testing device of the first aspect of the present invention, the second sensor is disposed between the second flow meter and the outlet of the rear connector.

[0017] According to the extracorporeal circulation tubing capacity testing device of the first aspect of the present invention, the detection liquid storage device is configured as a magnetically stirred water bath, and the magnetically stirred water bath is provided with a heating module, a stirring module and a constant temperature module.

[0018] According to the extracorporeal circulation tubing capacity testing device of the first aspect of the present invention, the first pump body is configured as a gear pump for stably delivering the test liquid.

[0019] According to the extracorporeal circulation tubing capacity testing device of the first aspect of the present invention, the outlet of the detection fluid storage device is located at the bottom of the detection fluid storage device, and the inlet of the detection fluid storage device is located at the top of the detection fluid storage device.

[0020] According to the extracorporeal circulation tubing capacity testing device of the first aspect of this utility model, both the front connector and the rear connector are detachable self-sealing structures.

[0021] According to the extracorporeal circulation tubing capacity testing device of the first aspect of the present invention, both the front connector and the rear connector are detachably connected to the tubing to be tested.

[0022] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects: This invention involves adding sufficient test liquid to the test liquid storage device, connecting one end of the test pipeline to the front connector, and the other end of the test pipeline to the rear connector. Then, the solenoid valve and the first pump body are turned on, allowing the test liquid to flow through the first flow meter and finally flow from the outlet of the front connector to the test pipeline. When the second sensor senses the flow of test liquid, it determines that the test pipeline has been completely filled with test liquid, and the system automatically triggers a stop command. At this time, the data collected by the first flow meter is the flow rate data of the test pipeline, and the system automatically calculates the blood volume of the sample. Attached Figure Description

[0023] 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 capacity testing device in the first embodiment of this utility model. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0030] Reference Figure 1 As shown, an extracorporeal circulation tubing capacity testing device is provided, including a test fluid storage device 1. The outlet of the test fluid storage device 1 is connected to a first pipeline 2. A solenoid valve 3, a first pump body 4, a first flow meter 5, and a front connector 6 are sequentially arranged on the first pipeline 2. The outlet of the front connector 6 is connected to a test pipeline 7. The other end of the test pipeline 7 is connected to a rear connector 8. The outlet of the rear connector 8 is connected to a second pipeline 9. The other end of the second pipeline 9 is connected to the inlet of the test fluid storage device 1. A second sensor 10 is arranged on the second pipeline 9.

[0031] In some embodiments of this utility model, the solenoid valve 3, the first pump body 4, the first flow meter 5, and the second sensor 10 are all connected to an intelligent control device 14, which facilitates user parameter setting, operation control, and result display.

[0032] In some embodiments of this utility model, a first sensor 11 is provided between the first flow meter 5 and the front connector 6. The first sensor 11 is located on the first pipeline 2 and is connected to the intelligent control device 14.

[0033] In some embodiments of this utility model, a second flow meter 12 and a detection liquid outlet 13 are also provided on the second pipeline 9. The inlet of the second flow meter 12 is connected to the outlet of the rear connector 8, and the outlet of the second flow meter 12 is connected to the detection liquid outlet 13. The other end of the detection liquid outlet 13 is connected to the inlet of the detection liquid storage device 1 through the second pipeline 9. The second flow meter 12 is connected to the intelligent control device 14.

[0034] In some embodiments of this invention, the second sensor 10 is disposed between the outlet of the second flow meter 12 and the rear connector 8.

[0035] In some embodiments of this utility model, the detection liquid storage device 1 is configured as a magnetically stirred water bath, which is equipped with a heating module, a stirring module and a constant temperature module.

[0036] In some embodiments of this invention, the first pump body 4 is configured as a gear pump for stably delivering the test liquid.

[0037] In some embodiments of this utility model, the outlet of the detection liquid storage device 1 is located at the bottom of the detection liquid storage device 1, and the inlet of the detection liquid storage device 1 is located at the top of the detection liquid storage device 1.

[0038] In some embodiments of this utility model, both the front connector 6 and the rear connector 8 are detachable self-sealing structures.

[0039] In some embodiments of this utility model, both the front connector 6 and the rear connector 8 are detachably connected to the pipeline 7 to be tested.

[0040] In this embodiment, the outlet of the detection liquid storage device 1 is connected to the front end of the solenoid valve 3 through the first pipe 2, the rear end of the solenoid valve 3 is connected to the inlet of the first pump body 4 through the first pipe 2, the outlet of the first pump body 4 is connected to the front end of the first flow meter 5 through the first pipe 2, the rear end of the first flow meter 5 is connected to the inlet of the front connector 6 through the first pipe 2, the outlet of the front connector 6 and the inlet of the rear connector 8 are connected through the test pipe 7, and the test pipe 7 is detachably connected to the outlet of the front connector 6 and the inlet of the rear connector 8. The first sensor 11 is located at the rear end of the first flow meter 5 and the front end of the inlet of the front connector 6. The outlet of the rear connector 8 is connected to the inlet of the second flow meter 12 through the second pipe 9, the outlet of the second flow meter 12 is connected to the front end of the detection liquid outlet 13 through the second pipe 9, and the rear end of the detection liquid outlet 13 is connected to the inlet of the detection liquid storage device 1 through the second pipe 9. The second sensor 10 is located between the outlet of the rear connector 8 and the inlet of the second flow meter 12.

[0041] The intelligent control device 14 is also equipped with a touchscreen, facilitating parameter setting, operation control, and result display for users. The tester also supports Chinese and English menus, making it convenient for both domestic and international users. It can monitor and record data in real time, providing strong support for data analysis. It effectively reduces the tediousness of manual operation and improves testing accuracy. Simultaneously, it displays test data in real time and has a result printing function, facilitating data analysis and recording for users.

[0042] This invention relates to two types of extracorporeal circulation tubing tests: a simple extracorporeal circulation tubing test and a complex branch extracorporeal circulation tubing test. The specific steps are as follows: 1. Simple extracorporeal circulation tubing test (1) Add sufficient test liquid to the magnetic stirring water bath, turn on the temperature control function, set the target temperature to 37°C, and start the stirring module at the same time. Wait for the temperature to stabilize at 37°C and maintain a constant temperature. Check the sealing of each component interface to ensure there is no risk of leakage.

[0043] (2) Start the gear pump to input the test fluid until the liquid flows out of the front connector, indicating that the first pipeline is full of liquid.

[0044] (3) Select the interface type (locking connector / dialysis connector / female connector, etc.) that matches the pipeline to be tested, and make a detachable connection between the outlet end of the pipeline to be tested and the rear connector, and confirm that the connection is secure. Using the same interface type, make a detachable connection between the front connector and the inlet end of the pipeline to be tested. The entire pipeline is unobstructed, and the first flow meter 5 starts counting.

[0045] (4) Start the gear pump and continuously fill the test pipeline with the test liquid; when the second sensor 10 senses the liquid flowing through, it determines that the test pipeline has been completely filled with the test liquid and the system automatically triggers the stop command; at this time, the first flow meter 5 collects the flow data of the sample, and the system automatically calculates the blood volume of the sample.

[0046] 2. Testing of complex branch extracorporeal circulation pipelines (1) Add sufficient test liquid to the magnetic stirring water bath, turn on the temperature control function, set the target temperature to 37°C, and start the stirring module at the same time. Wait for the temperature to stabilize at 37°C and maintain a constant temperature. Check the sealing of each component interface to ensure there is no risk of leakage.

[0047] (2) Select the interface type (locking connector / dialysis connector / female connector, etc.) that matches the pipeline to be tested, and make a detachable connection between the front connector and the inlet end of the pipeline to be tested, and confirm that the connection is secure. Using the same interface type, make a detachable connection between the rear connector and the outlet end of the pipeline to be tested, and ensure that the fluid passage is unobstructed.

[0048] (3) Turn on the gear pump to fill the system loop and the pipeline to be tested with the test liquid. After starting the system, the solenoid valve switches the medium to air according to the preset command. When the first sensor senses the air flowing through, the detection process starts and the second flow meter 12 starts counting. The air is pushed by the test liquid through the pipeline to be tested. When the second sensor senses the air, it is determined that the fluid in the pipeline to be tested has been completely replaced and the system triggers the shutdown command. At this time, the second flow meter collects the flow data of the pipeline to be tested, and the system automatically calculates the blood volume of the sample.

[0049] 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 capacity testing device, comprising a test fluid storage device (1), characterized in that, The outlet of the detection liquid storage device (1) is connected to a first pipeline (2). The first pipeline (2) is sequentially equipped with a solenoid valve (3), a first pump body (4), a first flow meter (5), and a front connector (6). The outlet of the front connector (6) is connected to a pipeline to be tested (7). The other end of the pipeline to be tested (7) is connected to a rear connector (8). The outlet of the rear connector (8) is connected to a second pipeline (9). The other end of the second pipeline (9) is connected to the inlet of the detection liquid storage device (1). A second sensor (10) is installed on the second pipeline (9).

2. The extracorporeal circulation tubing capacity testing device according to claim 1, characterized in that, The solenoid valve (3), the first pump body (4), the first flow meter (5) and the second sensor (10) are all connected to an intelligent control device (14), which facilitates user parameter setting, operation control and result display.

3. The extracorporeal circulation tubing capacity testing device according to claim 2, characterized in that, A first sensor (11) is provided between the first flow meter (5) and the front connector (6). The first sensor (11) is located on the first pipeline (2) and is connected to the intelligent control device (14).

4. The extracorporeal circulation tubing capacity testing device according to claim 2, characterized in that, The second pipeline (9) is also equipped with a second flow meter (12) and a detection liquid outlet (13). The inlet of the second flow meter (12) is connected to the outlet of the rear connector (8), and the outlet of the second flow meter (12) is connected to the detection liquid outlet (13). The other end of the detection liquid outlet (13) is connected to the inlet of the detection liquid storage device (1) through the second pipeline (9). The second flow meter (12) is connected to the intelligent control device (14).

5. The extracorporeal circulation tubing capacity testing device according to claim 4, characterized in that, The second sensor (10) is disposed between the second flow meter (12) and the outlet of the rear connector (8).

6. The extracorporeal circulation tubing capacity testing device according to claim 1, characterized in that, The detection liquid storage device (1) is configured as a magnetic stirring water bath, which is equipped with a heating module, a stirring module and a constant temperature module.

7. The extracorporeal circulation tubing capacity testing device according to claim 1, characterized in that, The first pump body (4) is configured as a gear pump for stable delivery of the test liquid.

8. The extracorporeal circulation tubing capacity testing device according to claim 1, characterized in that, The outlet of the detection liquid storage device (1) is located at the bottom of the detection liquid storage device (1), and the inlet of the detection liquid storage device (1) is located at the top of the detection liquid storage device (1).

9. The extracorporeal circulation tubing capacity testing device according to claim 1, characterized in that, Both the front connector (6) and the rear connector (8) are detachable self-sealing structures.

10. The extracorporeal circulation tubing capacity testing device according to claim 9, characterized in that, Both the front connector (6) and the rear connector (8) are detachably connected to the pipeline to be tested (7).

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