An infusion pump status detection device and method simulating clinical scenarios

Abstract

The present invention discloses an infusion pump status detection device and method for simulating clinical scenarios, which relates to the field of medical device detection technology. The device includes: a simulated venous blood vessel circuit, a simulated clinical venous infusion circuit and a device connection channel. When in use, the device to be tested is connected; the power pump, the pipeline filling valve and the flow control valve 4 are started to fill all pipelines with liquid from the liquid storage chamber; the flow control valve 1 or the flow control valve 2 or the flow control valve 3 are opened to simulate the venous blood flow circulation and the clinical venous infusion scenario respectively through the simulated venous blood vessel circuit and the simulated clinical venous multi-channel infusion circuit; after the simulated venous blood vessel circuit and the simulated clinical venous infusion circuit are running stably, the electronic balance records the initial mass of the liquid storage chamber and the mass change of the liquid storage chamber after the device to be tested is started, and the mass change is converted into volume flow rate through the density relationship, and compared with the infusion setting value and display value on the device to be tested to detect the operating status of the infusion pump.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device detection, and in particular to an infusion pump status detection device and method based on a weighing method and simulating a clinical scenario. Background Art

[0002] Infusion pumps and syringe pumps (abbreviated as infusion pumps) are widely used in medical settings, primarily for critically ill patients or when high-risk medications are being administered. Based on pharmacokinetics and pharmacodynamics, precise infusion of drugs with rapid action, short half-lives, and a narrow effective and safe dose range is particularly important in clinical practice. Furthermore, the infusion rate of specific drugs is often used as an indirect indicator for evaluating organ function in clinical patients. The infusion of these drugs requires the use of infusion pumps, making safety and effectiveness testing of infusion pumps extremely important. The main testing indicators for infusion pumps include appearance and function testing, flow testing, occlusion alarm pressure threshold testing, and alarm prompt function testing. Testing the difference between the set flow rate and the actual output flow rate, as well as the occlusion alarm pressure threshold, is particularly important.

[0003] At present, the functional testing of infusion pumps mainly relies on the monitoring of the output flow and post-occlusion pressure of the infusion pumps with relevant instruments to test the function of the infusion pumps. Figure 1 and Figure 2 ( Figure 2 h1 is the height from the infusion container to the infusion pump, and h2 is the height from the input end of the infusion pump and the output end of the measurement system to the same horizontal plane).

[0004] However, clinical infusion situations vary widely, including variations in venous pressure across patients, changes in venous cannula patency (resistance), simultaneous multi-channel infusions, significant differences in flow rates across channels, and large variations in the height of infusion pump bags. Consequently, the aforementioned testing methods are inadequate for assessing the pump's adaptability to these clinical situations, nor can they scientifically determine optimal clinical infusion methods. Summary of the Invention

[0005] The embodiments of the present invention provide an infusion pump status detection device and method that simulates clinical scenarios, which can solve the problems existing in the above-mentioned background technology.

[0006] An embodiment of the present invention provides an infusion pump status detection device that simulates a clinical scenario, comprising: a simulated venous blood vessel circuit, a simulated clinical venous multi-channel infusion circuit, and a device connection channel;

[0007] The simulated venous blood vessel circuit includes: a liquid storage chamber provided on an electronic balance, the liquid storage chamber being in communication with an inlet of a power pump, the outlet of the power pump being in communication with a first port of a diversion device 1, the second port of the diversion device 1 being in communication with a liquid inlet provided on an upper portion of a columnar container, a liquid discharge port at a lower portion of the columnar container being in communication with an upper portion of the liquid storage chamber, a pressure threshold drain valve being provided at the drain port; a controller controlling a threshold pressure of the pressure threshold drain valve according to a set pressure to stabilize the pressure in the columnar container, thereby simulating venous pressure;

[0008] The simulated clinical venous multi-channel infusion circuit comprises: the third port of the shunt device 1 is connected to the first port of the shunt device 2; the second port, third port, fourth port, and fifth port of the shunt device 2 are respectively connected to the first connecting pipe through flow control valve 1, flow control valve 2, flow control valve 3, and a pipeline filling valve; one end of the first connecting pipe is connected to the venous inlet of the columnar container in sequence through a variable resistance valve and a deep vein catheterization model; the lower discharge port of the columnar container and the venous inlet of the columnar container maintain the same horizontal plane, and the angle between the lower discharge port and the venous inlet and the center point of the plane is less than 180 degrees.

[0009] The device connection channel includes: the other end of the first connecting tube is connected to a spring valve, the spring valve is used to prevent liquid overflow when the simulated clinical venous multi-channel infusion circuit is filled with liquid and to connect to the device to be tested;

[0010] Wherein, the power pump, the pressure threshold drain valve, the flow control valve 1, the flow control valve 2, the flow control valve 3, the pipeline filling valve and the variable resistance valve are all electrically connected to the controller.

[0011] Furthermore, a pressure sensor 1 is provided in the second connecting pipe between the power pump and the diverter device 1 , and the pressure sensor 1 is electrically connected to the controller;

[0012] The controller is used to obtain the actual pressure value in the second connecting pipe through the pressure sensor 1, and control the power of the power pump according to the preset pressure threshold and the actual pressure value.

[0013] Furthermore, the safety drain port on the upper portion of the columnar container is in communication with the upper portion of the liquid storage chamber, and the safety drain port is used to prevent liquid from overflowing when the pressure threshold drain valve fails.

[0014] Furthermore, a flow control valve 4 is provided on the liquid inlet at the upper portion of the columnar container, and the flow control valve 4 is electrically connected to the controller.

[0015] Furthermore, a pressure sensor 2 is provided in the first connecting pipe between the flow control valve 3 and the variable resistance valve, and the pressure sensor 2 is electrically connected to the controller.

[0016] Furthermore, a flow sensor is provided in the first connecting tube between the deep vein catheterization model and the venous input port of the columnar container, and the flow sensor is electrically connected to the controller.

[0017] A method for detecting an infusion pump state that simulates a clinical scenario, comprising:

[0018] Start the power pump, pipeline filling valve and flow control valve 4, and simultaneously open flow control valve 1 or flow control valve 2 or flow control valve 3 to fill all pipelines with liquid from the liquid storage chamber to operate the simulated venous vascular circuit and the simulated clinical venous multi-channel infusion circuit;

[0019] The initial mass of the liquid storage chamber is recorded by an electronic balance. When the mass is stable, it indicates that the simulated venous vascular circuit and the simulated clinical venous multi-channel infusion circuit are running stably.

[0020] Connect the device under test;

[0021] Start the device under test, and use an electronic balance to record the mass change of the liquid storage chamber after startup. The mass change per unit time is recorded as the mass flow rate of the device under test;

[0022] The mass flow rate is converted into volume flow rate through the liquid density relationship and compared with the infusion setting value and display value on the device under test to detect the operating status of the infusion pump.

[0023] Furthermore, the above detection method also includes:

[0024] When the device to be tested is in operation, flow control valve 1, flow control valve 2, flow control valve 3 and the pipeline filling valve are closed, and the controller controls the variable resistance valve to completely block the first connecting pipe. The pressure in the first connecting pipe after blockage is monitored by pressure sensor 2 to detect the infusion pump blockage alarm pressure threshold.

[0025] The embodiments of the present invention provide an infusion pump status detection device and method that simulates clinical scenarios. Compared with the prior art, the device and method have the following beneficial effects:

[0026] (1) The present invention sets up a simulated venous blood vessel circuit, in which the liquid flows stably, and can be used to simulate a flow-type venous circulation outside the human body; at the same time, the present invention sets up a simulated clinical venous multi-channel infusion circuit, and the flow control valves 1, 2, and 3 in this circuit can simulate a multi-channel infusion scenario with different clinical flow rates. In addition, the variable resistance valve can simulate a scenario in which the resistance of the clinical infusion pipeline increases, and is ultimately used to simulate an in vitro venous infusion scenario close to a real clinical scenario; that is, due to the setting of the simulated venous blood vessel circuit and the simulated clinical venous multi-channel infusion circuit, the present invention can detect the real working state of the infusion pump under the simulated clinical scenario, and further ensure the safety of the equipment in clinical use; and the present invention has a high clinical simulation effect and is representative of clinical scenarios; since the problems existing in the background technology cannot be studied in the human body, the in vitro simulated venous multi-channel infusion model designed by the present invention can provide a basis for answering clinical-related questions (phenomena) and the research and development and improvement of infusion equipment.

[0027] (2) The present invention can realize a monitoring method based on the weighing method to simulate the clinical infusion situation, thereby avoiding the situation where the bubble method measurement is inconsistent with the actual clinical infusion situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the connection relationship of the syringe pump detection in the prior art;

[0029] Figure 2 This is a schematic diagram of the connection relationship of the infusion pump detection in the prior art;

[0030] Figure 3 A schematic diagram of the structure of an infusion pump status detection device simulating a clinical scenario provided by an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of electrical connections in an infusion pump status detection device simulating a clinical scenario provided by an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of the weighing method principle provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0039] 1. Design ideas of the present invention:

[0040] 1) Test Principle: Mass = Density × Volume (m = ρ × V), Flow Rate = △V / t = △m / ρ / t (△m is the therapeutic change). The density ρ of the test fluid can be determined before testing. If distilled water with a density of 1 g / ml is used as the test fluid, the formula can be simplified to Flow Rate = △m / t.

[0041] 2) Reasons for choosing the gravimetric method: ① The gravimetric method is one of the standard methods for measuring infusion pump flow rate; ② Simulating a clinical multi-channel venous infusion circuit requires simulating infusion through additional channels. Direct flow measurement cannot distinguish the flow output value of the device under test, and the flow rate of the device under test may be extremely low, and current flow sensors cannot meet its accuracy requirements; ③ Existing infusion pump flow detection technology generates bubbles, which is inconsistent with clinical infusion scenarios. Therefore, it cannot enter the simulated venous blood vessel circuit and simulated clinical multi-channel venous infusion circuit for simulation testing.

[0042] 3) Difficulties in implementing the weighing method: ① The existing weighing method cannot re-inject the weighed liquid into a simulated venous vascular circuit and a simulated clinical venous multi-channel infusion circuit for simulation testing; ② The monitoring accuracy of the electronic balance for the weighing method must reach at least 0.1 mg. The maximum range of this type of high-precision electronic balance is less than 250 g, so the device to be tested (weighing significantly more than 250 g) cannot be placed directly on the balance for △m monitoring.

[0043] 4) Solution to the Difficulty: Design a circulatory system with low compliance. After the liquid circulation in the system is stable, the pressure in the liquid reservoir is the lowest in the entire circulation path. Therefore, the mass of the liquid newly injected into the circulation system (i.e., the liquid output by the infusion pump to be tested) is concentrated in the liquid reservoir. Therefore, after the circulation system is stable, the change in the liquid mass in the liquid reservoir is measured as △m. The specific principle is shown in Figure 5 After stable operation, the flow out of the reservoir is q1+q2+q3, the flow rate of the device under test is Q, and the final flow rate entering the reservoir is q1+q2+q3+Q, resulting in a net flow rate Q injected into the reservoir, which is equal to the flow rate of the device under test. In actual use, △W ÷ △t is the mass flow rate, which is divided by the liquid density to obtain the volume flow rate Q. Furthermore, the continuous circulation of the liquid in the design can overcome errors in instantaneous velocity measurement at low flow rates caused by insufficient liquid filling in the pipeline in the simulation system.

[0044] 5) High-precision electronic balance design requirements: ① The mass signal must be read by the controller in real time; ② The minimum measurement must be ≤ 0.1 mg. This is because infusion pump quality testing requires testing three flow rates: high, medium, and low. In the low flow rate state, the infusion pump flow rate is 1 ml / h, and the test fluid density is set to 1 g / ml. If the instantaneous flow rate (t = 1 second) is tested, Δm = 0.2778 mg. Therefore, the balance accuracy for gravimetric testing must be at least 0.1 mg.

[0045] 2. Design of the detection device of the present invention:

[0046] See also Figures 3-4 The embodiment of the present invention provides an infusion pump status detection device that simulates a clinical scenario. The device includes: a simulated venous blood vessel circuit, a simulated clinical venous multi-channel infusion circuit, and a device connection channel. The details are as follows:

[0047] 1) Simulated venous circuit, i.e., a deep vein simulator with adjustable pressure, which includes:

[0048] A liquid storage chamber is provided on the electronic balance, the liquid storage chamber is connected to the inlet of the power pump, the outlet of the power pump is connected to the first port of the diversion device 1, the second port of the diversion device 1 is connected to the liquid inlet provided on the upper part of the columnar container, the lower discharge port of the columnar container is connected to the upper part of the liquid storage chamber, and a pressure threshold discharge valve is provided at the discharge port; the controller controls the threshold pressure of the pressure threshold discharge valve according to the set pressure to stabilize the pressure in the columnar container to simulate venous pressure.

[0049] The height of the vertically placed columnar container should be ≥ the height of the water column corresponding to the maximum central venous pressure of the human body to ensure the simulation of a circulating venous system with a certain pressure.

[0050] There are two holes at the bottom of the cylindrical container: hole 1 is connected to the deep vein catheter model; hole 2 is the pressure threshold drain port, and the outlet of the pressure threshold drain port is provided with a pressure threshold drain valve, which acts as a threshold resistor. The threshold is the simulated set pressure (simulated venous pressure). When the pressure in the cylindrical container is higher than the threshold, the pressure threshold drain valve opens to discharge excess liquid. When the pressure in the container is less than or equal to the threshold, the pressure threshold drain valve closes; hole 1 and hole 2 maintain the same horizontal plane but maintain a certain angle with the center line to ensure that the pressure levels at hole 1 and hole 2 are equal, that is, the pressure threshold drain port at the lower part of the cylindrical container maintains the same horizontal plane as the venous inlet so that the pressures of the two are equal, and the angle with the midpoint line is less than 180°, which can avoid the impact force of the liquid flow inertia affecting the stability of the liquid pressure in the cylindrical container; the pressure threshold drain port of hole 2 is connected to the drainage tube to the liquid storage chamber.

[0051] Two holes are located on the top side of the columnar container. Hole 1 is the liquid inlet, connected to an inlet tube equipped with a flow control valve 4. A controller controls the power pump to draw liquid from the reservoir and inject it into the columnar container until the bottom pressure threshold opens, maintaining a constant flow rate to simulate blood flow. Hole 2 is a safety drain port, designed to prevent liquid discharge obstruction caused by a malfunction of the bottom threshold resistor. Liquid discharged from this port enters the reservoir. Holes 1 and 2 are located on the same horizontal plane but at a certain angle to the center line. Flow control valve 4 also controls the inlet flow rate, allows for faster pressure regulation within the columnar container, and prevents pressure disturbances caused by the power pump, thereby maintaining stable pressure and flow within the columnar container.

[0052] The pressure inside the columnar container is greater than the pressure inside the liquid storage chamber to ensure smooth flow of the liquid. In addition, the liquid storage chamber is provided with a liquid filling port for adding the test liquid used to start the cycle; the storage chamber is provided with a liquid discharge port for discharging waste liquid or excess test liquid.

[0053] In short, the liquid storage chamber + power pump + flow control valve 4 + liquid inlet + columnar container + pressure threshold liquid outlet + pressure threshold drain valve + controller constitute the "flow circulation adjustable pressure deep vein simulator structure"; the power pump + pressure sensor 1 + controller constitute the "stabilized pressure circulation power source".

[0054] 2) Simulate clinical multi-channel intravenous infusion circuit, the structure of which includes:

[0055] The third port of diverter device 1 is connected to the first port of diverter device 2. The second, third, fourth, and fifth ports of diverter device 2 are connected to the first connecting pipe via flow control valves 1, 2, 3, and the pipe filling valve, respectively. One end of the first connecting pipe is connected to the venous inlet of the columnar container via a variable resistance valve and a deep vein catheterization model. The lower discharge port of the columnar container is aligned with the venous inlet of the columnar container and has an angle of less than 180° with the line connecting their midpoints. It should be noted that diverter device 1 is a control valve comprising one inlet and two outlets.

[0056] Deep vein catheterization model design: In this part, a simulated catheter that can be adapted and connected to the device pipeline system is selected based on the length and thickness of the clinically used intravenous catheter (CVC / PICC).

[0057] Designed to simulate changes in infusion line resistance: A variable resistance valve is primarily used to simulate clinical scenarios of increased infusion line resistance, including unobstructed, partially obstructed, and completely obstructed, with the degree of obstruction adjustable between 0-100%. In practice, it can be set to three positions: "unobstructed," "partially obstructed," and "completely obstructed," controlled by a controller. Pressure sensor 2 monitors the pressure in the line after resistance changes, primarily used to detect the pressure threshold for infusion pump obstruction alarms.

[0058] Design for simulating multi-channel infusion at different speeds: The "stabilized pressure circulation power source" composed of a power pump + 2 pressure sensors + a controller provides power for multi-channel infusion; the flow control valves 1 / 2 / 3 + the controller constitute a "multi-channel custom flow" infusion system, and the operator can customize the flow of each channel through the controller.

[0059] 3) Equipment connection channel, its structure includes:

[0060] The other end of the first connecting tube is connected to a spring valve, which is used to prevent liquid overflow when the simulated clinical venous multi-channel infusion circuit is filled and to connect the device to be tested; the spring valve here is similar to a one-way valve.

[0061] 3. Design of the detection method of the present invention:

[0062] Based on the same inventive concept, on the basis of an infusion pump status detection device for simulating clinical scenarios provided in an embodiment of the present invention, an embodiment of the present invention further provides an infusion pump status detection method for simulating clinical scenarios, which specifically includes:

[0063] Start the power pump, pipeline filling valve and flow control valve 4, and simultaneously open flow control valve 1 or flow control valve 2 or flow control valve 3 to fill all pipelines with liquid from the liquid storage chamber to operate the simulated venous vascular circuit and the simulated clinical venous multi-channel infusion circuit;

[0064] The initial mass of the liquid storage chamber is recorded by an electronic balance. When the mass is stable, it indicates that the simulated venous vascular circuit and the simulated clinical venous multi-channel infusion circuit are running stably.

[0065] Connect the device under test;

[0066] Start the device under test, and use an electronic balance to record the mass change of the liquid storage chamber after startup. The mass change per unit time is recorded as the mass flow rate of the device under test;

[0067] The mass flow rate is converted into volume flow rate through the liquid density relationship and compared with the infusion setting value and display value on the device under test to detect the operating status of the infusion pump.

[0068] When the device to be tested is in operation, flow control valve 1, flow control valve 2, flow control valve 3 and the pipeline filling valve are closed, and the controller controls the variable resistance valve to completely block the first connecting pipe. The pressure in the first connecting pipe after blockage is monitored by pressure sensor 2 to detect the infusion pump blockage alarm pressure threshold.

[0069] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An infusion pump status detection device simulating a clinical scenario, characterized in that: include: Simulate venous vascular circuits, simulate clinical venous multi-channel infusion circuits and equipment connection channels; The simulated venous blood vessel circuit includes: a liquid storage chamber provided on an electronic balance, the liquid storage chamber being in communication with an inlet of a power pump, the outlet of the power pump being in communication with a first port of a diversion device, the second port of the diversion device being in communication with a liquid inlet provided on an upper portion of a columnar container, a liquid discharge port at a lower portion of the columnar container being in communication with an upper portion of the liquid storage chamber, a pressure threshold drain valve being provided at the drain port; a controller controlling a threshold pressure of the pressure threshold drain valve according to a set pressure to stabilize the pressure in the columnar container, thereby simulating venous pressure; The simulated clinical venous multi-channel infusion circuit comprises: a third port of the shunt device is connected to the first port of the shunt device; the second port, the third port, the fourth port, and the fifth port of the shunt device are respectively connected to a first connecting pipe via a flow control valve, a flow control valve, a flow control valve, and a pipeline filling valve; one end of the first connecting pipe is connected to the venous inlet of the columnar container in sequence via a variable resistance valve and a deep vein catheterization model; the lower discharge port of the columnar container and the venous inlet of the columnar container maintain the same horizontal plane, and the angle between the lower discharge port and the venous inlet and the center point of the plane is less than 180 degrees. The device connection channel includes: the other end of the first connecting tube is connected to a spring valve, the spring valve is used to prevent liquid overflow when the simulated clinical venous multi-channel infusion circuit is filled with liquid and to connect to the device to be tested; wherein the power pump, the pressure threshold drain valve, the flow control valve, the flow control valve, the flow control valve, the flow control valve, the pipeline filling valve and the variable resistance valve are all electrically connected to the controller; The safety drain port on the upper part of the columnar container is in communication with the upper part of the liquid storage chamber, and the safety drain port is used to prevent liquid from overflowing when the pressure threshold drain valve fails; A flow control valve is provided on the liquid inlet at the upper part of the columnar container, and the flow control valve is electrically connected to the controller.

2. The infusion pump status detection device for simulating clinical scenarios according to claim 1, characterized in that: A pressure sensor is provided in the second connecting pipe between the power pump and the diverter device, and the pressure sensor is electrically connected to the controller; The controller is used to obtain the actual pressure value in the second connecting pipe through the pressure sensor, and control the power of the power pump according to the preset pressure threshold and the actual pressure value.

3. The infusion pump status detection device for simulating clinical scenarios according to claim 1, characterized in that: A pressure sensor is provided in the first connecting pipe between the flow control valve and the variable resistance valve, and the pressure sensor is electrically connected to the controller.

4. The infusion pump status detection device for simulating clinical scenarios according to claim 1, wherein: A flow sensor is provided in the first connecting tube between the deep vein catheterization model and the venous input port of the columnar container, and the flow sensor is electrically connected to the controller.

5. A detection method for an infusion pump status detection device based on a simulated clinical scenario according to any one of claims 1 to 4, characterized in that: include: Starting the power pump, the pipeline filling valve and the flow control valve, and simultaneously opening the flow control valve or the flow control valve or the flow control valve to fill all pipelines with liquid from the liquid reservoir to operate the simulated venous vascular circuit and the simulated clinical venous multi-channel infusion circuit; The initial mass of the liquid storage chamber is recorded by an electronic balance. When the mass is stable, it indicates that the simulated venous vascular circuit and the simulated clinical venous multi-channel infusion circuit are running stably. Connect the device under test; Start the device under test, and use an electronic balance to record the mass change of the liquid storage chamber after startup. The mass change per unit time is recorded as the mass flow rate of the device under test; The mass flow rate is converted into volume flow rate through the liquid density relationship and compared with the infusion setting value and display value on the device under test to detect the operating status of the infusion pump.

6. The infusion pump status detection method for simulating clinical scenarios according to claim 5, characterized in that: Also includes: When the device to be tested is in operation, the flow control valve, flow control valve, flow control valve and pipeline filling valve are closed, the controller controls the variable resistance valve to completely block the first connecting pipe, and the pressure in the first connecting pipe after blockage is monitored by the pressure sensor to detect the infusion pump blockage alarm pressure threshold.

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