Automatic induction alarm device for liquid exosmosis during infusion

Abstract

The utility model discloses an automatic induction alarm device for liquid exosmosis during infusion, which comprises a first fixing band, a second fixing band, a connecting piece and a shell, one end of the first fixing band and one end of the second fixing band are respectively connected with two ends of the shell, and the other end of the first fixing band is connected with the other end of the second fixing band through the connecting piece. A leakage sensor is arranged on the side, facing the skin of a patient, of the shell, a control mechanism is arranged in the inner cavity of the shell, and a touch display screen is arranged on the side, away from the skin of the patient, of the shell. The device has the remarkable effects that slight pressure change of local soft tissue caused by liquid medicine exosmosis in a short time can be found, an alarm is immediately given, and the liquid medicine exosmosis can be found in time, so that medical staff can handle the liquid medicine exosmosis in time, and the injury of the liquid medicine exosmosis to a patient is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of infusion auxiliary articles, in particular to an automatic induction alarm device for liquid extravasation during infusion. Background Art

[0002] Infusion therapy is a commonly used and effective treatment method in clinical practice. During the process of intravenous infusion, due to various reasons, liquid extravasation often occurs, resulting in local swelling, pain, and even adverse reactions such as local tissue necrosis at the infusion site of the patient. In clinical practice, although nursing work is busy and regular inspections are carried out as required, due to large individual differences among patients, such as cognitive dysfunction or reduced sensory function in the elderly due to disease factors, when liquid extravasation occurs in such patients, it cannot be discovered in time.

[0003] The functions of conventional infusion tubes are simple. At present, there is no good monitoring method for the phenomenon of intravenous infusion extravasation, and it can only be discovered through manual means (patients or escorts or medical staff). However, for the above-mentioned special patients (such as those with cognitive dysfunction or reduced sensory function), the situation of liquid extravasation is often not discovered in time. Often, it is only discovered after liquid extravasation has occurred for a period of time and certain symptoms have appeared, which cannot meet people's needs. Therefore, it is of great significance to discover liquid extravasation in the first time, deal with it in time, and avoid the occurrence of the above various adverse reactions.

[0004] Therefore, an automatic induction alarm device for liquid extravasation during infusion that can monitor in real time and automatically sense and alarm is needed. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide an automatic induction alarm device for liquid extravasation during infusion, which can monitor in real time whether liquid extravasation occurs and can alarm in time at the early stage of liquid extravasation, so as to solve the technical problem that infusion extravasation cannot be discovered in time and medical staff cannot be notified to deal with it in the prior art.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] An automatic induction alarm device for liquid extravasation during infusion, which is characterized in that: it includes a first fixing belt, a second fixing belt, a connecting piece and a shell. One end of the first fixing belt and one end of the second fixing belt are respectively connected to both ends of the shell, and the other end of the first fixing belt and the other end of the second fixing belt are connected through the connecting piece. A leakage sensor is arranged on the side of the shell facing the patient's skin, a control mechanism is arranged in the inner cavity of the shell, and a touch display screen is arranged on the side of the shell away from the patient's skin;

[0008] The control mechanism includes a preconditioning module, a digital-to-analog converter, a microcontroller, a memory, an audible alarm, a vibration alarm, and a power supply module. The signal output end of the leakage sensor is electrically connected to the signal input end of the microcontroller through the preconditioning module and the digital-to-analog converter. The signal input ends of the audible alarm and the vibration alarm are connected to the signal output end group of the microcontroller. The memory, the touch display screen, and the microcontroller perform data interaction.

[0009] Further, the preconditioning module includes a signal amplification circuit and a filtering circuit, which are respectively used for amplifying and filtering the collected analog signals. The signal amplification circuit includes operational amplifiers U1, U2, and U3. The non-inverting input end of operational amplifier U1 is connected to the signal output end of the leakage sensor. The inverting input end of operational amplifier U1 is connected to the output end of operational amplifier U1 through resistor R1. The output end of operational amplifier U1 is connected to the inverting input end of operational amplifier U3 through resistor R3. The non-inverting input end of operational amplifier U2 is connected to the output end of the power supply module through resistor R8. The non-inverting input end of operational amplifier U2 is also grounded through series-connected resistor R9. The inverting input end of operational amplifier U2 is connected to the output end of operational amplifier U2 through resistor R2. The output end of operational amplifier U2 is connected to the non-inverting input end of operational amplifier U3 through resistor R4. The output end of operational amplifier U3 is connected to the inverting input end of operational amplifier U3 through resistor R5. The output end of operational amplifier U3 is connected to the digital-to-analog converter through resistor R7. The non-inverting input end of operational amplifier U1 is also grounded through capacitor C1. The non-inverting input end of operational amplifier U3 is grounded through parallel-connected resistor R6 and capacitor C2. The common end of resistor R7 and the digital-to-analog converter is grounded through capacitor C3.

[0010] Further, a start-stop switch is provided on the side wall of the housing, and the start-stop switch is electrically connected in the power supply line between the power supply module and the microcontroller.

[0011] Further, a wireless communication module is also connected to the microcontroller, and the wireless communication module is used to connect to a remote terminal in the nurse station through a wireless network.

[0012] Further, the leakage sensor includes a plurality of sensing ends, and the plurality of sensing ends are evenly distributed on one side of the housing close to the patient's skin, and the plurality of sensing ends are all connected to the input end of the signal amplification module.

[0013] Further, the leakage sensor adopts an array-distributed flexible thin-film pressure sensor.

[0014] Further, the power supply module adopts a button cell.

[0015] Further, the connecting member adopts a magic tape.

[0016] The remarkable effects of the utility model are:

[0017] 1. The leakage sensor with multiple sensing ends can detect slight pressure changes in local soft tissue due to extravasation of drug solution in a short period of time, and immediately alarm to remind patients and medical staff to deal with it in time.

[0018] 2. The pressure values output by multiple sensing ends are amplified, filtered, and converted from digital to analog, and then compared by the microcontroller with the pressure threshold input through the touch screen and stored in the storage module. The microcontroller determines whether an alarm is needed based on the comparison result, thereby ensuring the accuracy of the alarm signal in both physical structure and software, and avoiding false touches and false alarms.

[0019] 3. The first fixing strap and the second fixing strap are connected by Velcro to form a fixing structure with adjustable length, so that the device can not only be adjusted according to the thickness of the patient's wrist, but also can be worn on different limbs of the patient.

[0020] 4. A start-stop switch for realizing power on / off control of the microcontroller is provided on the shell. After the patient wears the device and presses the start-stop switch, the microcontroller can determine whether to sound an alarm based on the signal sensed by the leakage sensor. At the same time, when the medical staff learns of the alarm signal and is about to treat the patient, the start-stop switch can be pressed again to stop the device from sounding the alarm, or the leakage monitoring of the infusion site can be stopped after the infusion is completed, thereby solving the defect that the device is always powered on, resulting in insufficient battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a state diagram of the utility model when it is used;

[0023] Figure 3 It is a schematic diagram of the structure of the shell;

[0024] Figure 4 is a cross-sectional view of the shell;

[0025] Figure 5 It is a circuit principle block diagram of the utility model;

[0026] Figure 6 This is the circuit schematic diagram of the signal amplification module. DETAILED DESCRIPTION

[0027] The specific implementation manner and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0028] like Figures 1-4As shown in the figure, an automatic induction alarm device for liquid extravasation during infusion includes a first fixing band 1, a second fixing band 2, a connecting member 3 and a housing 4. One end of the first fixing band 1 and one end of the second fixing band 2 are respectively connected to both ends of the housing 4, and the other end of the first fixing band 1 and the other end of the second fixing band 2 are connected through the connecting member 3. A leakage sensor 5 is provided on the side of the housing 4 facing the patient's skin, a control mechanism 6 is provided in the inner cavity of the housing 4, a touch display screen 7 is provided on the side of the housing 4 away from the patient's skin, and a start-stop switch 8 is provided on the side wall of the housing 4. Specifically, medical staff put the wearable ring formed by the first fixing band 1, the second fixing band 2, the connecting member 3 and the housing 4 on the patient, and make the leakage sensor 5 cover the part of the patient's limb that may swell during infusion. When liquid extravasation occurs, the patient's limb shows local swelling. The swollen limb presses the leakage sensor 5 in the direction away from the skin, that is, the swollen limb generates pressure on the leakage sensor 5. When the pressure detected by the leakage sensor 5 is greater than the preset threshold, the control mechanism issues an alarm, so that medical staff can timely learn that there is a problem of liquid extravasation for timely treatment.

[0029] A start-stop switch 8 for realizing on / off control is provided on the housing 4. After medical staff put on this device for the patient and press the start-stop switch 8, the microcontroller can judge whether to give an alarm according to the signal sensed by the leakage sensor. At the same time, when medical staff learn the alarm signal and are about to treat the patient, they can press the start-stop switch again to control this device to stop the alarm, or stop monitoring the leakage at the infusion position after the infusion is completed, thus solving the defect that the device keeps being powered on resulting in insufficient battery life.

[0030] From Figure 1 It can also be seen that the leakage sensor 5 includes a plurality of sensing ends, and the plurality of sensing ends are evenly distributed on the side of the housing 4 close to the patient's skin, and the plurality of sensing ends are all connected to the input end of the signal amplification module. Through the above design, the plurality of sensing ends are more evenly dispersed, making the pressure monitoring sensitivity higher.

[0031] In this example, the connecting member 3 is a magic tape. The first fixing band and the second fixing band are connected by a magic tape to form a fixed structure with adjustable length, so that this device can not only be adjusted according to the thickness of the patient's wrist, but also can be worn on different limb parts of the patient.

[0032] See Appendix Figure 5, the control mechanism 6 includes a preconditioning module, a digital-to-analog converter, a microcontroller, a memory, a sound alarm, a vibration alarm, and a power supply module. The signal output ends of multiple sensing ends of the leakage sensor 5 are electrically connected to the signal input end of the microcontroller through the preconditioning module and the digital-to-analog converter. The signal input ends of the sound alarm and the vibration alarm are connected to the signal output end group of the microcontroller. The memory, the touch display screen 7, and the microcontroller perform data interaction. The start-stop switch 8 is electrically connected in the power supply line between the power supply module and the microcontroller. A wireless communication module is also connected to the microcontroller, and this wireless communication module is used to be connected to a remote terminal in the nurse station through a wireless network.

[0033] The preconditioning circuit has multiple pressure sensor slot interfaces, that is, it has multi-channel pressure measurement signal input ports, and supports multiple sensing ends of the penetration sensor 5 to be connected through the slot interfaces, and can perform multi-point matrix pressure measurement on the pressure at the infusion site. In this way, the distribution of the pressure values at the infusion site can be known. Based on this, multiple sensing ends of the penetration sensor 5 are used to detect the real-time pressure values at the skin covered by the housing 4. The preconditioning circuit includes a signal amplification circuit and a filtering circuit, which amplify and filter the collected analog signals. The signals processed by the preconditioning circuit are sent to the digital-to-analog converter. The digital-to-analog converter is used to convert the amplified analog signals into digital signals. The microcontroller identifies the digital signals as pressure values and compares them with the pressure thresholds stored in the storage module. If the real-time monitored pressure value is greater than the pressure threshold, an alarm drive signal is issued, and the sound alarm and the vibration alarm perform sound and vibration alarms according to the alarm drive signal. In addition, the touch display screen 7 is used to set different pressure thresholds according to different patients, so as to avoid false reminders or false alarms due to individual differences of patients, further improve the reliability of the alarm signal, and can also display the measured pressure values in real time, and can also display the pressure curve and the results of data analysis of the pressure curve. The wireless communication module sends reminder or alarm signals to the remote terminal set in the nurse station, and the remote terminal issues a ringing or vibration reminder, which is convenient for medical staff to monitor in real time whether the patient has had extravasation of the infusion liquid at the nurse station. The wireless communication module is ZigBee, WiFi or Bluetooth, etc. The power supply module is used to provide working power for the above-mentioned modules.

[0034] Please refer to the appendix Figure 6, the preconditioning module includes a signal amplification circuit and a filtering circuit, which are respectively used for amplifying and filtering the collected analog signals. The preconditioning module includes a signal amplification circuit and a filtering circuit, which are respectively used for amplifying and filtering the collected analog signals. The signal amplification circuit includes operational amplifiers U1, U2, and U3. The non-inverting input terminal of operational amplifier U1 is connected to the signal output terminal of the leakage sensor 5. The inverting input terminal of operational amplifier U1 is connected to the output terminal of operational amplifier U1 through resistor R1. The output terminal of operational amplifier U1 is connected to the inverting input terminal of operational amplifier U3 through resistor R3. The non-inverting input terminal of operational amplifier U2 is connected to the output terminal of the power supply module through resistor R8. The non-inverting input terminal of operational amplifier U2 is also grounded through series-connected resistor R9. The inverting input terminal of operational amplifier U2 is connected to the output terminal of operational amplifier U2 through resistor R2. The output terminal of operational amplifier U2 is connected to the non-inverting input terminal of operational amplifier U3 through resistor R4. The output terminal of operational amplifier U3 is connected to the inverting input terminal of operational amplifier U3 through resistor R5. The output terminal of operational amplifier U3 is connected to the digital-to-analog converter through resistor R7. The non-inverting input terminal of operational amplifier U1 is also grounded through capacitor C1. The non-inverting input terminal of operational amplifier U3 is grounded through parallel-connected resistor R6 and capacitor C2. The common terminal of resistor R7 and the digital-to-analog converter is grounded through capacitor C3.

[0035] For the signal amplification circuit with the above circuit structure, the signals output by the leakage sensor 5 are amplified in two stages by operational amplifiers U1 and U3, so that the digital-to-analog converter can sample them and send them to the microcontroller for comparison and judgment.

[0036] In this example, all components are purchased as existing components on the market. The leakage sensor 5 uses an RX-M1616 array distributed flexible film pressure sensor. The digital-to-analog converter selects a DAC0832 digital-to-analog conversion chip. The power supply module uses a button battery. The microcontroller can select a Raspberry Pi BCM2835 module or a 51 series single-chip microcomputer. The memory uses a 24C02 storage chip.

[0037] The leakage sensor with multiple sensing terminals can detect slight pressure changes in local soft tissues due to drug leakage in a short period of time. By screening out the pressure sensing data with the largest pressure value among multiple sensing terminals, and then after amplification and digital-to-analog conversion, the microcontroller compares it with the pressure threshold input through the touch display screen and stored in the storage module, so as to judge whether to alarm according to the comparison result, realizing the accuracy of the alarm signal in both physical structure and software aspects and avoiding false touches and false alarms.

[0038] The above has introduced in detail the technical solution provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only for helping to understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An automatic induction alarm device for liquid extravasation during infusion, characterized in that: It includes a first fixing strap (1), a second fixing strap (2), a connecting member (3) and a housing (4). One end of the first fixing strap (1) and one end of the second fixing strap (2) are respectively connected to two ends of the housing (4), and the other end of the first fixing strap (1) and the other end of the second fixing strap (2) are connected by the connecting member (3). A leakage sensor (5) is provided on the side of the housing (4) facing the patient's skin, a control mechanism (6) is provided in the inner cavity of the housing (4), and a touch display screen (7) is provided on the side of the housing (4) away from the patient's skin. The control mechanism (6) includes a preamplification module, an analog-to-digital converter, a microcontroller, a memory, an audible alarm, a vibration alarm and a power module. The signal output end of the leakage sensor (5) is electrically connected to the signal input end of the microcontroller through the preamplification module and the analog-to-digital converter. The signal input ends of the audible alarm and the vibration alarm are connected to the signal output end group of the microcontroller. The memory, the touch display screen (7) and the microcontroller perform data interaction.

2. The automatic induction alarm device for liquid extravasation during infusion according to claim 1, wherein: The preamplification module includes a signal amplification circuit and a filtering circuit, which are respectively used for amplifying and filtering the collected analog signals. The signal amplification circuit includes operational amplifiers U1, U2, and U3. The non-inverting input end of operational amplifier U1 is connected to the signal output end of the leakage sensor (5). The inverting input end of operational amplifier U1 is connected to the output end of operational amplifier U1 through resistor R1. The output end of operational amplifier U1 is connected to the inverting input end of operational amplifier U3 through resistor R3. The non-inverting input end of operational amplifier U2 is connected to the output end of the power module through resistor R8. The non-inverting input end of operational amplifier U2 is also grounded through series-connected resistor R9. The inverting input end of operational amplifier U2 is connected to the output end of operational amplifier U2 through resistor R2. The output end of operational amplifier U2 is connected to the non-inverting input end of operational amplifier U3 through resistor R4. The output end of operational amplifier U3 is connected to the inverting input end of operational amplifier U3 through resistor R5. The output end of operational amplifier U3 is connected to the analog-to-digital converter through resistor R7. The non-inverting input end of operational amplifier U1 is also grounded through capacitor C1. The non-inverting input end of operational amplifier U3 is grounded through parallel-connected resistor R6 and capacitor C2. The common end of resistor R7 and the analog-to-digital converter is grounded through capacitor C3.

3. The automatic induction alarm device for liquid extravasation during infusion according to claim 1, characterized in that: A start-stop switch (8) is provided on the side wall of the housing (4), and the start-stop switch (8) is electrically connected to the power supply line between the power module and the microcontroller.

4. The automatic induction and alarm device for liquid extravasation during infusion according to claim 1, characterized in that: A wireless communication module is also connected to the microcontroller, and the wireless communication module is used to connect to a remote terminal in the nurse station through a wireless network.

5. The automatic induction alarm device for liquid extravasation during infusion according to claim 1, wherein: The leakage sensor (5) includes a plurality of sensing ends, and the plurality of sensing ends are evenly distributed on the side of the housing (4) close to the patient's skin. The plurality of sensing ends are all connected to the input end of the signal amplification module.

6. The automatic induction alarm device for liquid extravasation during infusion according to claim 5, characterized in that: The leakage sensor (5) adopts an array-distributed flexible thin-film pressure sensor.

7. The automatic induction and alarm device for liquid extravasation during infusion according to claim 1, wherein: The power module adopts a button cell.

8. The automatic induction alarm device for liquid extravasation during infusion according to claim 1, wherein: The connecting member (3) adopts a magic tape.

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