Electronic sensing application device for arteriovenous puncture leakage monitoring

Abstract

The utility model discloses an electronic sensing application device for monitoring leakage of an arteriovenous puncture needle. The electronic sensing application device comprises a leakage signal acquisition device, a signal processing system, a wireless communication module, a power supply device and an analysis terminal. The leakage signal acquisition device is simple in structure and convenient to operate, the leakage signal acquisition device is adhered to the skin of an arteriovenous puncture part of a patient, and when leakage occurs, liquid flows into the micro-channel of the flexible micro-channel substrate layer, so that the conductive hydrogel layer absorbs water and is wet, the resistance is increased, the change is transmitted to a signal processing system through the electrode plate, and the leakage signal acquisition device is used for acquiring leakage signals. The signal processing system processes the signal and then transmits the signal to the analysis terminal through the wireless communication module, so that a guardian can process the leaked liquid in time.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an electronic sensor application device for monitoring leakage of arterial and venous puncture needles. Background Art

[0002] Arterial and venous puncture for infusion therapy, blood pressure monitoring, or interventional surgery is a widely used clinical technique and is required for almost all hospitalized patients. Although the incidence of bleeding and drug leakage through the puncture site is low, once it occurs, the patient can suffer blood loss, local tissue necrosis, and in severe cases, life-threatening consequences. Because leakage has many causes and cannot be completely prevented, early detection and timely treatment are key to preventing serious consequences. However, due to long infusion times, the puncture site being obscured by clothing and bedding, and the patient undergoing anesthesia and surgery, the puncture site is not under constant monitoring, resulting in leakage not being discovered until serious consequences have occurred.

[0003] To this end, we need to develop an electronic sensing patch that can monitor the puncture site in a timely and effective manner, and promptly send the detected puncture leakage to medical staff, thereby reducing the adverse consequences of leakage for patients and alleviating the workload of medical staff. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the existing arteriovenous puncture site monitoring, which is easy to fail to monitor in place and remind in time, and to provide an electronic sensor applicator for arteriovenous puncture needle leakage monitoring.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an electronic sensor patch device for monitoring leakage during arterial and venous puncture, comprising a leakage signal acquisition device, a signal processing system connected to the leakage signal acquisition device, a wireless communication module connected to the signal processing system, and a power supply device connected to the signal processing system and the wireless communication module; the leakage signal acquisition device comprises a flexible microfluidic substrate layer, a conductive hydrogel layer adhered to the flexible microfluidic substrate layer, and two electrode sheets arranged on the conductive hydrogel layer; the signal processing system is respectively connected to the two electrode sheets.

[0006] Furthermore, microfluidic channels are provided on the flexible microfluidic channel substrate layer.

[0007] As one of the preferred embodiments, the number of the microfluidic channel is one, and the microfluidic channel is arranged on the flexible microfluidic channel substrate layer in a straight line or a curved line, such as a continuous S-shaped or spiral arrangement.

[0008] As a second preferred embodiment, the number of the microchannels is two or more. In this case, all the microchannels are interconnected, and the drainage port of each microchannel is located on the edge of the flexible microchannel substrate layer, and the drainage port extends below the adhesive surface of the conductive hydrogel layer.

[0009] Depending on actual needs, the number of the flexible microfluidic channel substrate layers is one, and the conductive hydrogel layer is bonded to the flexible microfluidic channel substrate layer. Alternatively, the number of the flexible microfluidic channel substrate layers is two, and the conductive hydrogel layer is disposed between the two flexible microfluidic channel substrate layers.

[0010] In order to ensure the use effect of the present invention, the flexible microfluidic channel substrate layer is an adhesive bonding layer.

[0011] The thickness of the flexible microfluidic channel substrate layer is 0.3-1.5 mm.

[0012] Furthermore, the signal processing system includes an MCU chip, a signal amplifier, a low-pass filter connected to the signal output end of the MCU chip, and an A / D converter connected in series between the signal input end of the MCU chip and the signal output end of the signal amplifier; the signal amplifier is respectively connected to the two electrode sheets.

[0013] In order to facilitate viewing, alarm reminders and real-time analysis, the utility model also includes an analysis terminal, which is a computer and / or a mobile phone.

[0014] The power supply device of the present invention is preferably implemented by a rechargeable battery.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model has a simple structure and is easy to operate. By sticking the leakage signal acquisition device on the skin of the patient's arterial and venous puncture site, when the puncture site leaks, the liquid flows into the microchannel of the flexible microchannel substrate layer, causing the wet resistance of the conductive hydrogel layer to begin to rise. This change is transmitted to the signal processing system through the electrode sheet. The signal processing system processes the signal and then transmits it to the analysis terminal through the wireless communication module, so that the guardian can deal with the leakage at the puncture site in time, effectively prevent further leakage, avoid serious consequences, and greatly improve the effectiveness and reliability of use.

[0017] 2. The utility model can not only achieve the effects of sterilization, fixation, isolation and protection of the puncture site of the traditional dressing, but also can promptly send the leakage situation of the puncture site to medical staff, thereby effectively reducing the adverse consequences of leakage for patients and reducing the workload of medical staff.

[0018] 3. The dressing of the present invention is made of low-cost and biocompatible materials, which is economical and of great clinical significance. It does not increase the financial burden on patients and effectively assists in the clinical care of puncture leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structural diagram of the utility model.

[0020] Figure 2 This is a structural diagram of the leakage signal acquisition device of the present utility model.

[0021] Figure 3 This is a schematic structural diagram of the flexible microfluidic channel substrate layer of the present invention.

[0022] The names of the reference numerals in the above drawings are:

[0023] 1—flexible microfluidic channel substrate layer, 2—conductive hydrogel layer, 3—electrode sheet, 4—microfluidic channel, 5—signal connector. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example

[0026] like Figures 1 to 3 As shown, the electronic sensor patch device for arterial and venous puncture needle leakage monitoring described in the present invention includes a leakage signal acquisition device, a signal processing system, a wireless communication module, and a power supply device. Specifically, the leakage signal acquisition device is connected to the signal processing system. The leakage signal acquisition device is an adhesive component. When in use, the leakage signal acquisition device is attached to the skin of the patient's arterial and venous puncture site. Figure 2 As shown, the leakage signal acquisition device includes a flexible microfluidic substrate layer 1, a conductive hydrogel layer 2, and an electrode sheet 3. The flexible microfluidic substrate layer 1 is an adhesive bonding layer with a thickness of 0.3 to 1.5 mm. In this embodiment, the thickness of the flexible microfluidic substrate layer 1 is preferably set to 1.5 mm. The thickness of the flexible microfluidic substrate layer 1 can be adjusted accordingly according to actual production needs, such as setting it to 0.3 mm, 0.5 mm, 0.8 mm, 0.9 mm, 1 mm, 1.2 mm, etc. The material of the flexible microfluidic substrate layer 1 can preferably be a biocompatible soft material such as PDMS and TPU.

[0027] The conductive hydrogel layer 2 is pasted on the flexible microfluidic substrate layer 1. The conductive hydrogel layer 2 is a conventional conductive hydrogel composed of deionized water, glycerol, PVA powder and potassium chloride powder in the prior art. Once liquid leaks into the conductive hydrogel layer 2, its resistance will increase rapidly.

[0028] The number of the flexible microfluidic substrate layer 1 can be one or two. When the flexible microfluidic substrate layer 1 is one layer, the conductive hydrogel layer 2 is bonded and connected to the flexible microfluidic substrate layer 1. When the number of the flexible microfluidic substrate layer 1 is two layers, the conductive hydrogel layer 2 is arranged between the two layers of flexible microfluidic substrate layers 1. The shape of the conductive hydrogel layer 2 is the same as that of the flexible microfluidic substrate layer 1; or the shape of the conductive hydrogel layer 2 is the same as that of the flexible microfluidic substrate layer 1, but its area is smaller than that of the flexible microfluidic substrate layer 1; or the shape of the conductive hydrogel layer 2 is different from that of the flexible microfluidic substrate layer 1. In actual use, any selection can be made.

[0029] The electrode sheets 3 are used for current signal transmission, that is, the resistance change of the conductive hydrogel layer 2 is transmitted to the signal processing system through the change of the current signal. There are two electrode sheets 3, and they are preferably symmetrically arranged on the conductive hydrogel layer 2, such as symmetrically arranged at the upper and lower ends, left and right ends, or on the front and back of the conductive hydrogel layer 2. During installation, the signal processing system is connected to the two electrode sheets 3 respectively. In actual use, the two electrode sheets 3 are preferably connected to the signal connector 5, and then connected to the signal processing system through the signal connector 5, thereby realizing the quick plug-in and unplug function between the two electrode sheets 3 and the signal processing system.

[0030] like Figure 1 and Figure 3 As shown, in order to ensure that the leaked liquid can flow well into the conductive hydrogel layer 2 on the flexible microfluidic substrate layer 1, this embodiment provides a microchannel 4 on the flexible microfluidic substrate layer 1 for the leaked liquid to flow therein. The number and shape of the microchannel 4 can be set arbitrarily. For example, the number of the microchannel 4 can be set to one. In this case, the microchannel 4 can be arranged in a straight line or in a curved shape on the flexible microfluidic substrate layer 1. The so-called straight line arrangement means that the microchannel 4 is directly arranged in a straight line at any angle on the flexible microfluidic substrate layer 1. The curved shape arrangement means that the microchannel 4 is in any shape other than a straight line, such as a continuous S-shape, a wave shape, a spiral shape, etc.

[0031] When there are two or more microchannels 4, the microchannels 4 can be arranged in a cross-shaped pattern, a matrix pattern, or a star pattern, without any specific limitation in this embodiment. Regardless of the number of microchannels 4 and their arrangement, the microchannels 4 must be interconnected, and the drainage port of each microchannel 4 is located on the edge of the flexible microchannel substrate layer 1, with its outlet extending below the adhesive surface of the conductive hydrogel layer 2, to ensure that leaked liquid, regardless of its location, can promptly contact the conductive hydrogel layer 2.

[0032] In a specific implementation, the width of the micro channel 4 is preferably made to be 0.3 mm, and the depth is 0.5 mm.

[0033] like Figure 1 As shown, the wireless communication module is connected to the signal processing system. The wireless communication module in this embodiment is preferably implemented using a wireless communication module with model AC6328A. The wireless communication module is mainly used to convert the current signal processed by the signal processing system and then transmit it through a wireless network.

[0034] In specific use, other modules with the same performance as the AC6328A wireless communication module can be used as the wireless communication module in this embodiment as needed. The wireless communication module ultimately transmits the monitored information to the monitor's analysis terminal via wireless transmission.

[0035] The analysis terminal can be a computer, a mobile phone, or a combination of a computer and a mobile phone. Any electronic device that can be used to display or operate data can be used as the analysis terminal in this embodiment. In this embodiment, the analysis terminal is preferably set to be a computer at the medical desk.

[0036] The power supply device is used to provide operating voltage for the signal processing system and the wireless communication module, and is connected to the signal processing system and the wireless communication module respectively. In specific implementation, the power supply device in this embodiment is preferably implemented by a rechargeable battery.

[0037] The structure of the signal processing system is as follows Figure 1 As shown, it includes an MCU chip, a low-pass filter, and an A / D converter. In actual use, the signal processing system, wireless communication module, and power supply device can be packaged in a pre-built flexible PCB board.

[0038] Specifically, the MCU chip in this embodiment can be a conventional STM32F103C8T6 microcontroller chip in the prior art. A signal amplifier is connected to the signal output terminal of the MCU chip, and the signal amplifier can be a conventional L358 signal amplifier. An A / D converter is connected in series between the signal input terminal of the MCU chip and the signal output terminal of the signal amplifier. The model of the A / D converter in this embodiment can be AD8802. The signal amplifier is respectively connected to the two electrode sheets 3. The model of the wireless communication module can be AC6328A.

[0039] In specific implementation, electronic components such as signal amplifiers, MCU chips, A / D converters, wireless communication modules, and low-pass filters are designed based on circuit logic and functional requirements and are not restricted by specific models. That is, signal amplifiers, MCU chips, A / D converters, wireless communication modules, and low-pass filters can be implemented with the same functions other than those in this embodiment.

[0040] When the present invention is used, the leakage signal acquisition device is attached to the skin below the puncture site of the patient's intravenous catheter. When leakage occurs, liquid flows into the microchannels 4 of the flexible microchannel substrate layer 1, causing the conductive hydrogel layer 2 to absorb water and increase its resistance. This resistance change signal is transmitted via the electrode sheet 3 to the signal amplifier, which amplifies the resistance change signal, improving signal quality. The resistance change signal processed by the signal amplifier is transmitted to the A / D converter, which converts the received signal and transmits it to the MCU chip. The MCU chip processes the signal and transmits the processed information to the analysis terminal via a wireless communication module, achieving human-computer interaction and allowing the monitor to promptly address the leakage situation. This significantly improves the effectiveness, real-time nature, and reliability of arterial and venous puncture leakage monitoring.

[0041] As described above, the present invention can be well implemented.

Claims

1. An electronic sensor patch device for arterial and venous puncture leakage monitoring, characterized in that: The invention comprises a liquid leakage signal acquisition device, a signal processing system connected to the liquid leakage signal acquisition device, a wireless communication module connected to the signal processing system, and a power supply device connected to the signal processing system and the wireless communication module; the liquid leakage signal acquisition device comprises a flexible microfluidic channel substrate layer (1), a conductive hydrogel layer (2) adhered to the flexible microfluidic channel substrate layer (1), and two electrode sheets (3) arranged on the conductive hydrogel layer (2); the signal processing system is respectively connected to the two electrode sheets (3).

2. The electronic sensor patch device for arterial and venous puncture leakage monitoring according to claim 1, characterized in that: Microchannels (4) are provided on the flexible microchannel substrate layer (1).

3. The electronic sensor patch device for arterial and venous puncture leakage monitoring according to claim 2, characterized in that: The number of the microfluidic channel (4) is one, and the microfluidic channel (4) is arranged in a straight line or a curved line on the flexible microfluidic channel substrate layer (1).

4. The electronic sensor patch device for arterial and venous puncture leakage monitoring according to claim 2, characterized in that: When the number of the microchannels (4) is two or more, all the microchannels (4) are interconnected, and the drainage port of each microchannel (4) is located on the edge of the flexible microchannel substrate layer (1), and the drainage port extends below the adhesive surface of the conductive hydrogel layer (2).

5. The electronic sensor patch device for monitoring arterial and venous puncture leakage according to any one of claims 2 to 4, characterized in that: The number of the flexible microfluidic channel substrate layer (1) is one layer, and the conductive hydrogel layer (2) is bonded and connected to the flexible microfluidic channel substrate layer (1); or the number of the flexible microfluidic channel substrate layer (1) is two layers, and the conductive hydrogel layer (2) is arranged between the two flexible microfluidic channel substrate layers (1).

6. The electronic sensor patch device for arterial and venous puncture leakage monitoring according to claim 5, characterized in that: The flexible microfluidic channel substrate layer (1) is an adhesive bonding layer.

7. The electronic sensor patch device for arterial and venous puncture leakage monitoring according to claim 6, characterized in that: The thickness of the flexible microfluidic channel substrate layer (1) is 0.3-1.5 mm.

8. The electronic sensor patch device for arterial and venous puncture leakage monitoring according to claim 5, characterized in that: The signal processing system comprises an MCU chip, a signal amplifier, a low-pass filter connected to the signal output end of the MCU chip, and an A / D converter connected in series between the signal input end of the MCU chip and the signal output end of the signal amplifier; the signal amplifier is connected to the two electrode sheets (3) respectively.

9. The electronic sensor patch device for arterial and venous puncture leakage monitoring according to claim 1, characterized in that: It also includes an analysis terminal, which is a computer and / or a mobile phone.

10. An electronic sensor patch device for arterial and venous puncture leakage monitoring according to any one of claims 1 to 4, characterized in that: The power supply device is a rechargeable battery.

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