High-pressure injector intravenous injection leakage detection and alarm device based on electrical impedance

Abstract

The invention discloses an electrical impedance-based high-pressure injector intravenous injection leakage detection alarm device, which comprises a measuring electrode band, a high-pressure injector and a detection alarm device, and is characterized in that the measuring electrode band comprises a flexible ring band, a measuring electrode and a data line, and the detection alarm device is integrated with a power supply module, a data processing module and an alarm module. The device has the beneficial effects that the device is small in cell damage, low in price, high in usability, safe, reliable and small in size, and can be integrated in a high-pressure injector to be used in linkage with the high-pressure injector; high-pressure injection liquid leakage electrical impedance data and normal data are learned in advance through a trained improved support vector regression model prediction algorithm model, and an alarm threshold point is predicted, so that the accuracy of an alarm threshold can be effectively improved, injection liquid leakage of a high-pressure injector can be well detected, an alarm can be automatically given, and injection operation can be stopped. Various complications and sequelae caused by liquid leakage can be well prevented, and double guarantees are provided for patients and hospitals.

Description

TECHNICAL FIELD

[0001] The application relates to a medical detection alarm device, in particular to a high-pressure syringe intravenous injection leakage detection alarm device based on electrical impedance, and belongs to the technical field of medical image examination. BACKGROUND

[0002] With the rapid development of medical image examination technology, CT and magnetic resonance imaging (MRI) examination are rapidly popularized and are important bases for pathological diagnosis. Enhanced CT or MRI has unique advantages in aspects such as isodensity lesions, small lesions, judging the possibility of surgical resection of malignant tumors, evaluating curative effect after treatment, identifying blood vessel source lesions and reflecting local blood supply and blood flow, and is widely applied in clinical practice. Enhanced CT or MRI needs to inject special contrast medium, and the contrast medium is injected into the patient's body through a vein by using a high-pressure syringe during image examination to achieve the purpose of enhancement. However, drug extravasation is difficult to avoid during high-pressure injection, which is related to the pressure and speed of the high-pressure syringe injection, the elasticity of the patient's blood vessels, the irritability of the drug, the puncture technology of the medical staff, the fact that the patient accidentally moves the needle out of the blood vessel range after the needle is implanted and the like. Once drug extravasation occurs, damage will be caused to the local tissue or blood vessel, such as phlebitis, connective tissue hyperplasia, interfacial compartment syndrome and the like, and even local tissue necrosis or amputation. Once the damage occurs, the patient will be extremely painful, and the examination cannot continue because the drug extravasation does not enter the blood vessel normally, and the patient needs to be treated for several weeks to relieve the pain after the leakage.

[0003] At present, the prevention of high-pressure syringe intravenous leakage mainly relies on standardized needle implantation procedures, patient discomfort reporting, real-time observation of medical staff and strengthened leakage post-processing method training, and there is no device that can effectively detect high-pressure syringe injection leakage, alarm and stop continuous injection. SUMMARY

[0004] The purpose of the present application is to provide a high-pressure syringe intravenous injection leakage detection alarm device based on electrical impedance to solve at least one of the above technical problems.

[0005] The application achieves the above-mentioned purpose by the following technical scheme: a high-pressure syringe intravenous injection leakage detection alarm device based on electrical impedance, comprising a measurement electrode belt, a high-pressure syringe and a detection alarm device, the measurement electrode belt is in signal transmission connection with the detection alarm device, and the measurement electrode belt is worn on the arm of the patient.

[0006] The measuring electrode belt comprises a flexible ring belt, measuring electrodes and a data line, the skin-close side of the flexible ring belt is provided with a plurality of measuring electrodes, and the data line is connected with the measuring electrodes through a main control module;

[0007] The detection alarm device is integrated with a power module, a data processing module and an alarm module, the power supply device in the high-pressure syringe is stepped up or down to the working range of the device through the power module, the main control module supplies power to the device through a sine wave generating module and a constant current source module, the main control module inputs the power supply into the sine wave generating module and the constant current source module, controls the excitation mode, excitation frequency and current size of the electrodes in the measuring electrode belt, the data processing module receives the electrode potential difference value transmitted by the data line 5, and the alarm module is used for sending an alarm signal.

[0008] As a further scheme of the present application: the sine wave generating module generates a 20HZ-500kHZ sine wave voltage signal which is small in damage to human body.

[0009] As a further scheme of the present application: the constant current source module converts the power supply input by the power supply into a weak excitation current of 1-5mA which is safe for human body and stably delivers the current into the measuring electrode belt.

[0010] As a further scheme of the present application: the measuring electrodes comprise N electrodes a and b arranged in pairs, N electrodes c and d corresponding to the electrodes a and b are arranged at opposite positions, the electrodes a and c and the electrodes b and d correspond to each other in pairs to form 2N pairs of electrodes, and the number of N is not less than 5.

[0011] As a further scheme of the present application: the data processing module analyzes the resistance impedance data transmitted by the main control module in real time and compares the data with a pre-trained alarm threshold, and if the resistance impedance data exceeds the alarm threshold, an alarm signal is sent to the alarm module.

[0012] As a further scheme of the present application: the alarm module is composed of a high-power buzzer and a red LED indicator, and when the alarm signal is detected, the buzzer buzzes and the LED indicator flashes.

[0013] As a further scheme of the present application: the flexible ring belt is made of flexible material, the flexible ring belt can wrap around the injection site of the patient for one turn, and the movable end of the flexible ring belt is connected with a magic tape.

[0014] As a further scheme of the present application: the flexible ring belt is further provided with a skin fit detection module.

[0015] As a further scheme of the present application: the skin fit detection module comprises a photoelectric sensor 3, a micro buzzer and an LED indicator, and the photoelectric sensor is in signal transmission connection with the micro buzzer and the LED indicator.

[0016] A high-pressure injector injection leakage alarm threshold prediction method based on electrical impedance, comprising an electrical impedance-based high-pressure injector intravenous injection leakage detection alarm device, the prediction method comprising the following steps:

[0017] A. By wearing a measuring electrode belt on the arm of different testers, the electrical impedance data when leakage occurs in the safe range and when no leakage occurs are collected multiple times respectively, and the data is filtered and denoised to reduce interference and ensure the accuracy of the data;

[0018] B. The obtained data is normalized and an improved support vector regression model is established, and the model is trained to achieve high prediction accuracy;

[0019] C. The collected electrical impedance data is used to train the improved support vector regression model for machine learning and prediction of the leakage threshold as an alarm point.

[0020] The beneficial effects of the present application are:

[0021] 1. The device has small cell damage, low price, strong ease of use, safety and reliability, small size, and can be integrated into a high-pressure injector and used with a high-pressure injector.

[0022] 2. The improved support vector regression model prediction algorithm model learns and predicts the alarm threshold point in advance by learning the high-pressure injection leakage electrical impedance data and normal data, which can effectively improve the accuracy of the alarm threshold.

[0023] 3. The sinusoidal wave generation module and constant current source module of the device give the current frequency and current size as 20HZ-500kHZ and 1-5mA, respectively, which can reduce the damage to the human body

[0024] 4. In order to accurately detect the fit between the electrode belt and the skin, the detection device is a photoelectric sensor, which detects the distance between the electrode belt and the patient's skin through the light emitted by the photoelectric sensor, when the measuring electrode belt is worn well, the LED indicator light turns green and emits a short prompt sound to indicate that it has been worn well, when the measuring electrode belt is not worn well, the LED indicator light turns red and emits a long prompt sound to indicate that it has not been worn well.

[0025] 5. The electrical impedance-based high-pressure injector intravenous injection leakage detection alarm device provided by the embodiment of the present application can detect high-pressure injector injection leakage and automatically alarm and stop injection operation, and can well prevent various complications and sequelae caused by leakage, providing double protection for patients and hospitals. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1This is a flowchart illustrating the prediction of the intravenous injection leakage alarm threshold for a high-pressure injector based on electrical impedance according to the present invention.

[0027] Figure 2 This is a flowchart of the intravenous injection leakage detection and alarm of the high-pressure injector based on electrical impedance according to the present invention;

[0028] Figure 3 This is a schematic diagram of the measuring electrode strip of the present invention;

[0029] Figure 4 This is a schematic diagram of wearing the measuring electrode band of the present invention;

[0030] Figure 5 This is a schematic diagram of the overall operation of the high-pressure injector intravenous leakage detection and alarm device based on electrical impedance according to the present invention.

[0031] In the diagram: 1. Flexible loop belt, 2. Velcro, 3. Photoelectric sensor, 4. Measuring electrode, 5. Data cable. Detailed Implementation

[0032] 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 only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1, such as Figures 1 to 5 As shown, a high-pressure injector intravenous leakage detection and alarm device based on electrical impedance includes a measuring electrode strip, a high-pressure injector, and a detection and alarm device. The measuring electrode strip and the detection and alarm device are connected by signal transmission. The measuring electrode strip is worn on the patient's arm.

[0034] The measuring electrode band includes a flexible ring band 1, measuring electrodes 4 and a data cable 5. Several measuring electrodes 4 are arranged on the side of the flexible ring band 1 that is close to the skin. The data cable 5 is connected to the measuring electrodes 4 through the main control module.

[0035] The detection alarm device is integrated with a power module, a data processing module and an alarm module. The power supply device in the high-pressure injector is stepped up or down to the working range of the device through the power module. The main control module supplies power to the device through the sine wave generation module and the constant current source module. The main control module inputs the power supply into the ground, and then inputs the stable voltage and current into the sine wave generation module and the constant current source module. The main control module controls the excitation mode, excitation frequency and current size of the electrodes in the measuring electrode belt. The real-time excitation mode is adjusted according to the actual situation of the patient. The resistance and impedance data collected by the measuring electrode belt are input into the data processing module. If the alarm information is detected, a stop injection instruction is sent to the high-pressure injector. The data processing module receives the electrode potential difference value transmitted by the data line 5. The alarm module is used for sending an alarm signal.

[0036] As shown in Figures 1 to 5 In addition to including all the technical features in Example 1, this embodiment also includes:

[0037] The sine wave generation module generates a 20HZ-500kHZ sine wave voltage signal which has little harm to the human body.

[0038] The constant current source module converts the power supply input by the power supply into a weak excitation current of 1-5mA which is safe for the human body and stably delivered into the measuring electrode belt.

[0039] The measuring electrode 4 includes a pair of N electrodes a and b. N electrodes c and d corresponding to the electrodes a and b are arranged at opposite positions. The electrodes a and c, and the electrodes b and d correspond to each other in pairs to form 2N pairs of electrodes. The number of N is not less than 5. In use, the potential difference of the remaining electrode pairs is detected by alternately exciting the Nth electrode pair to complete one excitation cycle. The above process is repeated to read the detected resistance and impedance data in real time and return them to the main control module.

[0040] The data processing module analyzes the resistance and impedance data transmitted by the main control module in real time and compares them with the pre-trained alarm threshold. If the resistance and impedance data exceed the alarm threshold, an alarm signal is sent to the alarm module.

[0041] The alarm module is composed of a high-power buzzer and a red LED indicator. When the alarm signal is detected, the buzzer beeps and the LED indicator flashes.

[0042] As shown in Figure 3 In addition to including all the technical features in Example 1, this embodiment also includes:

[0043] The flexible ring belt 1 is made of flexible material, and the flexible ring belt 1 can wrap around the patient's injection site. The movable end of the flexible ring belt 1 is connected with the magic tape 2, so that the measurement electrode belt is more convenient in clinical use, and the wearing is more rapid and accurate. The learning and operation cost of medical staff is lower, and the flexible ring belt 1 is more suitable for skin tissue, and can more stably detect high-pressure injection leakage.

[0044] The skin fitting detection module is also provided in the flexible ring belt 1, which can more ensure whether the measurement electrode belt is worn well, reduce the risk of detection failure and improve the ease of use.

[0045] The skin fitting detection module includes a photoelectric sensor 3, a micro buzzer and an LED indicator light. The photoelectric sensor 3 is in signal transmission connection with the micro buzzer and the LED indicator light. The distance between the measurement electrode belt and the patient's skin is detected by the light emitted by the photoelectric sensor 3. When the measurement electrode belt is worn well, the LED indicator light turns green and emits a short prompt sound to indicate that it has been worn well. When the measurement electrode belt is not worn well, the LED indicator light turns red and emits a long prompt sound to indicate that it has not been worn well, so that the fitting degree between the electrode belt and the skin can be accurately detected.

[0046] As shown in Embodiment 4, Figure 2 A resistance impedance-based high-pressure injector injection leakage alarm threshold prediction method, including a resistance impedance-based high-pressure injector intravenous injection leakage detection alarm device, the prediction method comprising the following steps:

[0047] A. By wearing a measurement electrode belt on the drug injection site of different testers' arms, resistance impedance data when leakage in a safe range and when no leakage occurs are collected multiple times respectively, and the data is filtered and denoised to reduce interference and ensure the accuracy of the data;

[0048] B. The obtained data is normalized and an improved support vector regression model is established, and the model is trained to achieve high prediction accuracy;

[0049] C. The collected resistance impedance data is used to train the improved support vector regression model for machine learning and prediction of the leakage threshold as an alarm point.

[0050] Working principle: The machine learning is used to learn and predict the high-pressure injector injection leakage alarm threshold based on the pre-collected resistance impedance experimental data, so as to solve the harm caused by high-pressure injector injection leakage to patients. It is simple, safe, convenient, low in cost, small in size and can be integrated into the high-pressure injector.

[0051] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0052] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A high-pressure injector leakage detection and alarm device based on electrical impedance, comprising a measuring electrode strip, a high-pressure injector, and a detection and alarm device, characterized in that: The measuring electrode strip is connected to the detection alarm device via signal transmission, and the measuring electrode strip is worn on the patient's arm; The measuring electrode band includes a flexible ring (1), measuring electrodes (4) and a data line (5). Several measuring electrodes (4) are provided on the side of the flexible ring (1) that is close to the skin. The data line (5) is connected to the measuring electrodes (4) through the main control module. The detection and alarm device integrates a power supply module, a data processing module, and an alarm module. The power supply device in the high-pressure injector is stepped up and down by the power supply module to the working range of this device. The main control module supplies power to this device through a sine wave generator module and a constant current source module. The main control module inputs the power supply to the ground and inputs the voltage and current to the sine wave generator module and the constant current source module to control the excitation mode, excitation frequency, and current magnitude of the electrodes in the measuring electrode strip. The data processing module receives the electrode potential difference value transmitted by the data line (5). The alarm module is used to send alarm signals.

2. The high-pressure injector intravenous leakage detection and alarm device based on electrical impedance as described in claim 1, characterized in that: The sine wave generation module generates a 20Hz-500kHz sine wave voltage signal that is less harmful to the human body.

3. The high-pressure injector intravenous leakage detection and alarm device based on electrical impedance as described in claim 1, characterized in that: The constant current source module converts the power input into a weak excitation current of 1-5mA, which is safe for the human body, and stably delivers it into the measuring electrode strip.

4. The high-pressure injector intravenous leakage detection and alarm device based on electrical impedance as described in claim 1, characterized in that: The measuring electrode (4) includes N electrodes a and b arranged in pairs, and N electrodes c and d corresponding to electrodes a and b are arranged on opposite sides, so that electrodes a and c, and electrodes b and d correspond to each other to form 2N pairs of electrodes, with the number of N not less than 5.

5. The high-pressure injector intravenous leakage detection and alarm device based on electrical impedance as described in claim 1, characterized in that: The data processing module analyzes the impedance data sent by the main control module in real time and compares it with the pre-trained alarm threshold. If the impedance data exceeds the alarm threshold, it sends an alarm signal to the alarm module.

6. The high-pressure injector intravenous leakage detection and alarm device based on electrical impedance as described in claim 1, characterized in that: The alarm module consists of a high-power buzzer and a red LED indicator. When an alarm signal is detected, the buzzer sounds and the LED indicator flashes.

7. The high-pressure injector intravenous leakage detection and alarm device based on electrical impedance as described in claim 1, characterized in that: The flexible band (1) is made of flexible material and can wrap around the injection site of the patient. The movable end of the flexible band (1) is connected to Velcro (2).

8. The high-pressure injector intravenous leakage detection and alarm device based on electrical impedance as described in claim 7, characterized in that: The flexible ring (1) is also equipped with a skin fit detection module.

9. The high-pressure injector intravenous leakage detection and alarm device based on electrical impedance as described in claim 8, characterized in that: The skin fit detection module includes a photoelectric sensor (3), a miniature buzzer, and an LED indicator. The photoelectric sensor (3) is connected to the miniature buzzer and the LED indicator via signal transmission.

10. A method for predicting the leakage alarm threshold of a high-pressure injector based on electrical impedance, comprising the high-pressure injector intravenous injection leakage detection and alarm device based on electrical impedance as described in any one of 1-9 above, characterized in that, The prediction method includes the following steps: A. By wearing measuring electrode bands on the arms of different test subjects at the drug injection site, impedance data were collected multiple times under safe conditions when leakage occurred and when no leakage occurred. The data were then filtered and noise-reduced to reduce interference and ensure data accuracy. B. Normalize the obtained data and build an improved support vector regression model. Train this model to achieve higher prediction accuracy. C. The collected electrical impedance data are used to perform machine learning and predict the leakage threshold using a trained improved support vector regression model, and then used as an alarm point.

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