Infusion pump detector verification system and method

Abstract

The invention discloses an infusion pump detector verification system and method, and the method comprises the steps: a verification system driving module drives a medium in a plunger module to enter an infusion pump detector through a conduction module, obtains the flow and blocking pressure data of the infusion pump detector and the verification system, and carries out the comparison; the accuracy of flow detection and blocking pressure detection of the infusion pump detector can be rapidly judged, communication connection can be established between the verification system and the infusion pump detector, data comparison of flow and pressure can be actively completed, the intelligent degree is high, operation is easy, and the verification process is simple, convenient and rapid.

Description

Technical Field

[0001] This invention belongs to the field of infusion pump testing instrument calibration technology, specifically relating to an infusion pump testing instrument calibration system and method. Background Technology

[0002] Medical infusion pumps, including infusion pumps, syringe pumps, and analgesic pumps, are precision infusion devices widely used in clinical practice. The accuracy of their flow rate directly affects patient medication safety. Infusion pump testing instruments are specialized measuring devices used to detect key parameters such as flow rate and pressure of infusion pumps. These instruments themselves also require periodic calibration to ensure the accuracy and reliability of their measurement traceability. Currently, the calibration of infusion pump testing instruments typically employs the high-precision syringe micro-injector method. This method uses a metrologically calibrated high-precision glass syringe as a standard, connected in series with the testing instrument. Calibration is performed by comparing the measured volume with the instrument's reading. This method is cumbersome, inefficient, and requires highly skilled operators. It is difficult to automate the calibration of parameters such as pressure and blockage alarms, and the synchronization between devices is poor. A communication connection cannot be established between the calibration system and the infusion pump testing instrument, requiring manual comparison of the obtained flow and pressure data. The calibration process is tedious and prone to errors.

[0003] Therefore, a high-precision and intelligent calibration system is needed, which can establish a communication connection with the infusion pump detector, actively acquire the flow and blockage pressure data of both, and compare the data to achieve efficient and accurate calibration. In addition, according to actual needs, only one or a few fixed values ​​of pressure or flow of the infusion pump detector can be calibrated, simplifying the calibration process and improving calibration efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a calibration system and method for an injection pump detector. The calibration system's drive module drives the medium in the plunger module to enter the injection pump detector through the conduction module, and obtains and compares the flow rate and blockage pressure data of the injection pump detector and the calibration system itself. This allows for a rapid determination of the accuracy of the flow rate and blockage pressure detected by the injection pump detector. The calibration system and the injection pump detector can establish a communication connection and can actively perform data comparison of flow rate and pressure.

[0005] This invention is achieved through the following technical solution: A calibration system for an infusion pump testing instrument includes a drive module, a plunger module, a conduction module, a gas-liquid outlet, a gas source unit, and a control module; The drive module drives the plunger module to move; The plunger module is used to store and discharge the medium and calculate the flow rate of the medium; The connection module connects the plunger module and the gas source unit to the gas-liquid outlet, allowing the medium or gas flow out from the gas-liquid outlet. The connection module can read and record the pressure of the medium. The air source unit is used to purge and clean the plunger module, the conduction module, and the injection pump detector. The control module sends control commands to the drive module, the conduction module, and the air source unit; the control module is used to acquire and store the flow rate data and pressure data of the medium and the flow rate data and pressure data of the tested injection pump detector.

[0006] Preferably, the plunger module includes a plunger unit and a flow detection unit; the drive module is used to drive the plunger unit to reciprocate to draw in or discharge the medium; the flow detection unit is connected to the plunger unit and obtains the flow rate of the medium entering or leaving the plunger unit.

[0007] Preferably, the conduction module includes a conduction unit and a pressure detection unit; The conductive unit includes a liquid inlet passage, a liquid outlet passage, and a gas passage; The gas-liquid outlet includes a liquid inlet, a liquid outlet, and a gas outlet; The liquid inlet passage connects the liquid inlet and the plunger unit; The liquid outlet passage connects the liquid outlet and the plunger unit; The air outlet is connected to the air source unit; The pressure detection unit is connected to the liquid outlet passage; the pressure detection unit is used to obtain the medium pressure of the calibration system.

[0008] Preferably, the infusion pump detector is connected to the liquid outlet, and the air outlet can be connected to the liquid inlet, so that the gas generated by the gas source unit enters the plunger unit and the infusion pump detector through the liquid inlet passage.

[0009] Preferably, the control module includes a communication unit, an automatic verification unit, a data storage unit, and an instruction unit; Communication unit: Used to establish a communication connection with the infusion pump detector; Automatic calibration unit: used to acquire pressure and flow data of the test medium in the calibration system and the injection pump tester, and to compare the pressure and flow data of the calibration system and the injection pump tester; Data storage unit: Used to store the data results of the automatic verification unit comparison.

[0010] Command unit: Sends start / stop commands to the drive module, plunger module, conduction module and air source unit based on the status information of the communication unit, automatic calibration unit and data storage unit.

[0011] A method for calibrating an infusion pump tester, based on the aforementioned infusion pump tester calibration system, includes the following steps: S1: Connect the calibration system to the infusion pump tester; S2: Add detection medium to the plunger unit through the inlet; S3: The control module sends a motion command to the drive module, causing the detection medium to enter the injection pump detector through the outlet, and detects the pressure and flow of the injection pump detector. The pressure and flow data of the detection medium in the calibration system are compared with the pressure and flow data measured by the injection pump detector and recorded. S4: Connect the air outlet to the liquid inlet. The control module sends a start command to the air source unit to purge and clean the plunger unit, the conduction module, and the infusion pump detector.

[0012] Preferably, in step S1, the infusion pump detector is connected to the outlet of the calibration system via a hose; the infusion pump detector establishes a communication connection with the calibration system.

[0013] Preferably, in step S3, when the pressure and flow rate of the infusion pump detector are measured, the following measurement methods are included: Single-value detection: a fixed pressure or flow rate setpoint is preset, and the pressure or flow rate of the injection pump detector is calibrated based on the preset pressure or flow rate setpoint. Multi-value detection: Multiple fixed pressure or flow rate values ​​are preset, and the pressure and flow rate of the injection pump detector are verified based on these preset pressure or flow rate values. The fully automatic detection system has multiple preset fixed pressure or flow rate values. It detects both the flow rate and pressure of the injection pump detector. During the detection process, the flow rate is calibrated first, followed by the pressure calibration.

[0014] Preferably, in step S3, when the pressure tester of the infusion pump is performed, the outlet end of the infusion pump is closed after the test medium enters the infusion pump tester. The control module obtains the blocking pressure of the calibration system and the infusion pump tester, and compares the blocking pressure of the calibration system and the infusion pump tester numerically.

[0015] Preferably, in step S4, the air outlet and the liquid inlet are connected by a hose. The gas enters the liquid inlet passage, the plunger unit and the liquid outlet passage from the liquid inlet and then enters the infusion pump detector. Finally, the residual detection medium is blown out from the liquid outlet of the infusion pump detector.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1) In this invention, the medium in the driving plunger module of the calibration system enters the injection pump detector through the conduction module, and the flow rate and blockage pressure data of the injection pump detector and the calibration system itself are compared. The accuracy of the flow rate and blockage pressure detected by the injection pump detector can be quickly determined. The calibration system and the injection pump detector can establish a communication connection and can actively complete the comparison of flow rate and pressure data. It has a high degree of intelligence, is simple to operate, and the calibration process is simple and fast.

[0017] 2) In this invention, the calibration system is equipped with a gas source unit. The airflow generated by the gas source unit can enter the plunger module and the infusion pump detector in reverse through the conduction module to purge and clean the plunger module, conduction module and infusion pump detector, so as to avoid the growth of bacteria due to media residue.

[0018] 3) The verification method of the present invention can perform single-value detection, that is, preset a fixed pressure or flow rate setpoint, and perform single-value verification of the pressure or flow rate of the injection pump detector based on the preset pressure or flow rate setpoint; multi-value detection, that is, preset multiple fixed pressure or flow rate setpoints, and perform multiple value verifications of the pressure and flow rate of the injection pump detector based on the multiple preset pressure or flow rate setpoints; it can also perform fully automatic detection, that is, preset multiple fixed pressure or flow rate setpoints, and detect both the flow rate and pressure of the injection pump detector, and perform independent or joint verification of the pressure and flow rate according to the actual working conditions of the injection pump detector, which can save verification time and improve verification efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a logic block diagram of the infusion pump testing instrument calibration system in this invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Example 1:

[0022] A calibration system for an infusion pump testing instrument, such as Figure 1 As shown, it includes a drive module, a plunger module, a conduction module, a gas-liquid outlet, a gas source unit, and a control module; The drive module drives the plunger module to move, and the movement of the drive module can drive the plunger module to reciprocate, realizing the intake and discharge of the medium. The drive module is usually a geared motor.

[0023] The plunger module is used to store and discharge media and calculate the flow rate of the media. The plunger module includes a plunger unit and a flow detection unit. The drive module is used to drive the plunger unit to reciprocate to draw in or discharge the media. The plunger module is usually composed of one or more plungers. The flow detection unit is connected to the plunger unit and obtains the flow rate of the media entering or leaving the plunger unit. The flow detection unit uses a grating ruler, which is connected to the end of the plunger push rod and moves with the plunger push rod to calculate the liquid flow rate pushed out by the plunger by the movement distance.

[0024] The connection module connects the plunger module and the gas source unit to the gas-liquid outlet, allowing the medium or gas to flow out from the gas-liquid outlet. The connection module can read and record the pressure of the medium. The connection module includes a connection unit and a pressure detection unit.

[0025] The connection unit consists of multiple hoses, multiple tees, and several solenoid valves. The connection unit includes a liquid inlet passage, a liquid outlet passage, and a gas passage.

[0026] The pressure detection unit is usually a pressure sensor or pressure transmitter. The medium flows out of the plunger, passes through the conduction unit, and enters the pressure sensor, which can read the pressure of the medium.

[0027] The air source unit is used to purge and clean the plunger module, conduction module, and infusion pump tester. The air source unit is usually an air pump, which is connected to the air-liquid outlet through a hose.

[0028] The gas-liquid outlet includes a liquid inlet, a liquid outlet, and a gas outlet. The liquid inlet passage connects the liquid inlet and the plunger unit via a flexible hose, allowing the medium to enter the plunger unit from the outside. The liquid outlet passage connects the liquid outlet and the plunger unit via a flexible hose, allowing the liquid in the plunger unit to flow out through the liquid outlet passage and into the injection pump detector. The gas outlet is connected to the gas source unit via a flexible hose, allowing gas to be blown out from the gas outlet. The injection pump detector is connected to the liquid outlet, and the gas outlet and liquid inlet can be connected via flexible hoses, allowing gas to enter the plunger unit along the liquid inlet passage, and then be blown out through the liquid outlet passage and the injection pump detector, purging and cleaning the plunger unit and the injection pump detector.

[0029] The pressure detection unit is connected to the liquid outlet passage. The pressure detection unit is used to obtain the medium pressure of the calibration system. When the injection pump detector is pressure tested, after the medium enters the injection pump detector, the injection pump detector vents and seals the end to prevent the medium from flowing out. The pressure detection unit can measure the blockage pressure of the liquid outlet passage, and the injection pump detector can also measure its own blockage pressure. The blockage pressures measured by the two are compared and analyzed in the control module.

[0030] The air outlet can be connected to the liquid inlet, allowing the gas generated by the gas source unit to enter the plunger unit and the infusion pump detector through the liquid inlet passage.

[0031] The control module sends control commands to the drive module, conduction module, and air source unit; the control module is used to acquire and store the flow and pressure data of the medium and the flow and pressure data of the tested injection pump detector, and to complete the comparison of flow and pressure data between the calibration system and the injection pump detector in the control module.

[0032] The control module includes a communication unit, an automatic verification unit, a data storage unit, and an instruction unit; Communication unit: Used to establish a communication connection with the infusion pump detector, which can be established via data cable, Bluetooth or local area network.

[0033] Automatic calibration unit: used to acquire pressure and flow data of the test medium in the calibration system and the injection pump tester, and to compare the pressure and flow data of the calibration system and the injection pump tester.

[0034] Data storage unit: Used to store the data results of the automatic verification unit comparison, so as to facilitate the traceability of verification data.

[0035] Command unit: Sends start / stop commands to the drive module, plunger module, conduction module and air source unit based on the status information of the communication unit, automatic calibration unit and data storage unit.

[0036] The control module includes a touch screen, through which the verification method can be set, such as only performing flow rate or pressure verification. After the verification method is preset, the command unit sends a command to start the verification. If it is set to fully automatic detection, the automatic verification unit first performs flow rate verification and then pressure verification. The quality unit obtains the data from the automatic verification unit and determines whether the plunger unit draws in or discharges the medium. Example 2:

[0037] A method for calibrating an infusion pump tester, based on the aforementioned infusion pump tester calibration system, firstly, connects the calibration system to the infusion pump tester; connects the outlet of the infusion pump tester to the outlet of the calibration system via a flexible hose; and establishes a communication connection between the infusion pump tester and the calibration system.

[0038] The detection medium is added to the plunger unit through the inlet, and the control module sends a command to the drive module to make the plunger unit move to draw in the medium.

[0039] Next, the control module sends a motion command to the drive module, causing the detection medium to enter the infusion pump detector through the outlet. The pressure and flow rate of the infusion pump detector are then measured. The pressure and flow rate data of the detection medium in the calibration system are compared with the pressure and flow rate data measured by the infusion pump detector and recorded. The pressure and flow rate measurement of the infusion pump detector includes the following methods: Single-value testing involves setting a fixed pressure or flow rate value. The pressure or flow rate of the infusion pump detector is then calibrated based on this preset value. For example, if the flow rate of the calibration system is set to 10 mL / h, and the flow rate obtained in the calibration system is 10 mL / h, the flow rate measured by the infusion pump detector under normal conditions should also be 10 mL / h. If the flow rate data measured by the infusion pump detector is inaccurate and exceeds the error range, it means that the flow sensor in the infusion pump detector needs to be replaced or calibrated. The blockage pressure test is similar to the flow rate test and will not be elaborated here.

[0040] Multi-value detection involves pre-setting multiple fixed pressure or flow rate values. The pressure and flow rate of the infusion pump detector are then calibrated based on these preset values. For example, the calibration system flow rate is set to sequentially reach multiple points such as 10 mL / h, 20 mL / h, 30 mL / h, 40 mL / h, and 50 mL / h. The calibration system will then sequentially measure flow rates of 10 mL / h, 20 mL / h, 30 mL / h, 40 mL / h, and 50 mL / h. Similarly, the infusion pump detector should normally measure flow rates of 10 mL / h, 20 mL / h, 30 mL / h, 40 mL / h, and 50 mL / h. If one or more of the flow rate data measured by the infusion pump detector are inaccurate and exceed the error range, the flow sensor in the infusion pump detector needs to be replaced or calibrated. The blockage pressure test is similar to the flow rate detection and will not be elaborated further here.

[0041] The fully automatic testing system uses multiple preset fixed pressure or flow rate values ​​to test both the flow rate and pressure of the infusion pump. During the testing process, flow rate is calibrated first, followed by pressure calibration. The fully automatic testing employs multi-value testing, sequentially verifying multiple setpoints for flow rate and choking pressure.

[0042] When performing pressure testing on the infusion pump tester, the outlet end of the infusion pump tester is sealed after the test medium enters the tester. The control module obtains the blocking pressure of the calibration system and the infusion pump tester, and compares the blocking pressure values ​​of the calibration system and the infusion pump tester.

[0043] During cleaning and purging, the air outlet is connected to the liquid inlet, and the control module sends a start command to the air source unit to purge and clean the plunger unit, conduction module, and infusion pump detector. The air outlet and liquid inlet are connected by a hose. Gas enters the liquid inlet passage, plunger unit, and liquid outlet passage from the liquid inlet before entering the infusion pump detector. Finally, the residual detection medium is blown out from the liquid outlet of the infusion pump detector.

[0044] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A calibration system for an infusion pump testing instrument, characterized in that, It includes a drive module, a plunger module, a conduction module, a gas-liquid outlet, a gas source unit, and a control module; The drive module drives the plunger module to move; The plunger module is used to store and discharge the medium and calculate the flow rate of the medium; The connection module connects the plunger module and the gas source unit to the gas-liquid outlet, allowing the medium or gas flow out from the gas-liquid outlet. The connection module can read and record the pressure of the medium. The air source unit is used to purge and clean the plunger module, the conduction module, and the injection pump detector. The control module sends control commands to the drive module, the conduction module, and the air source unit; the control module is used to acquire and store the flow rate data and pressure data of the medium and the flow rate data and pressure data of the tested injection pump detector.

2. The infusion pump testing instrument calibration system as described in claim 1, characterized in that, The plunger module includes a plunger unit and a flow detection unit; the drive module is used to drive the plunger unit to reciprocate to draw in or discharge the medium; the flow detection unit is connected to the plunger unit and obtains the flow rate of the medium entering or leaving the plunger unit.

3. The infusion pump testing instrument calibration system as described in claim 2, characterized in that, The conduction module includes a conduction unit and a pressure detection unit; The conductive unit includes a liquid inlet passage, a liquid outlet passage, and a gas passage; The gas-liquid outlet includes a liquid inlet, a liquid outlet, and a gas outlet; The liquid inlet passage connects the liquid inlet and the plunger unit; The liquid outlet passage connects the liquid outlet and the plunger unit; The air outlet is connected to the air source unit; The pressure detection unit is connected to the liquid outlet passage; the pressure detection unit is used to obtain the medium pressure of the calibration system.

4. The infusion pump testing instrument calibration system as described in claim 3, characterized in that, The infusion pump detector is connected to the liquid outlet, and the air outlet can be connected to the liquid inlet, so that the gas generated by the gas source unit enters the plunger unit and the infusion pump detector through the liquid inlet passage.

5. The infusion pump testing instrument calibration system as described in claim 1, characterized in that, The control module includes a communication unit, an automatic verification unit, a data storage unit, and an instruction unit. Communication unit: Used to establish a communication connection with the infusion pump detector; Automatic calibration unit: used to acquire pressure and flow data of the test medium in the calibration system and the injection pump tester, and to compare the pressure and flow data of the calibration system and the injection pump tester; Data storage unit: Used to store the data results of the automatic verification unit comparison; Command unit: Sends start / stop commands to the drive module, plunger module, conduction module and air source unit based on the status information of the communication unit, automatic calibration unit and data storage unit.

6. A method for calibrating an infusion pump tester, characterized in that, The infusion pump testing instrument calibration system according to any one of claims 1-5 includes the following steps: S1: Connect the calibration system to the infusion pump tester; S2: Add detection medium to the plunger unit through the inlet; S3: The control module sends a motion command to the drive module, causing the detection medium to enter the injection pump detector through the outlet, and detects the pressure and flow of the injection pump detector. The pressure and flow data of the detection medium in the calibration system are compared with the pressure and flow data measured by the injection pump detector and recorded. S4: Connect the air outlet to the liquid inlet. The control module sends a start command to the air source unit to purge and clean the plunger unit, the conduction module, and the infusion pump detector.

7. The calibration method for the infusion pump tester as described in claim 6, characterized in that, In step S1, the infusion pump detector is connected to the outlet of the calibration system via a hose; the infusion pump detector establishes a communication connection with the calibration system.

8. The calibration method for the infusion pump tester as described in claim 6, characterized in that, In step S3, when testing the pressure and flow rate of the infusion pump detector, the following testing methods are included: Single-value detection: a fixed pressure or flow rate setpoint is preset, and the pressure or flow rate of the injection pump detector is calibrated based on the preset pressure or flow rate setpoint. Multi-value detection: Multiple fixed pressure or flow rate values ​​are preset, and the pressure and flow rate of the injection pump detector are verified based on these preset pressure or flow rate values. The fully automatic detection system has multiple preset fixed pressure or flow rate values. It detects both the flow rate and pressure of the injection pump detector. During the detection process, the flow rate is calibrated first, followed by the pressure calibration.

9. The calibration method for the infusion pump tester as described in claim 6, characterized in that, In step S3, when the pressure tester of the infusion pump is performed, the outlet end of the infusion pump is closed after the test medium enters the infusion pump tester. The control module obtains the blocking pressure of the calibration system and the infusion pump tester, and compares the blocking pressure of the calibration system and the infusion pump tester numerically.

10. The calibration method for the infusion pump tester as described in claim 6, characterized in that, In step S4, the air outlet and the liquid inlet are connected by a hose. The gas enters the liquid inlet passage, the plunger unit and the liquid outlet passage from the liquid inlet and then enters the infusion pump detector. Finally, the residual detection medium is blown out from the liquid outlet of the infusion pump detector.

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