Integrated data acquisition module and anesthesia depth monitor

Abstract

The invention relates to the technical field of medical instruments, and provides a data acquisition module and an anesthesia depth monitor, the data acquisition module comprises an electroencephalogram lead wire and a sensor which are connected, and one surface, used for being in contact with the skin, of the sensor is provided with conductive adhesive; the conductive adhesive comprises the following components: water, 1, 2-propylene glycol, potassium chloride and sodium polyacrylate. According to the data acquisition module provided by the invention, the conductive adhesive comprises the components of water, 1, 2-propylene glycol, potassium chloride and sodium polyacrylate, and the electrical property of the conductive adhesive of the component type is optimized, so that the efficient transmission of weak electroencephalogram signals can be ensured, and the monitoring accuracy of an anesthesia depth monitor, the long-term stability of equipment and the clinical use safety are enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a data acquisition module and an anesthesia depth monitor. BACKGROUND

[0002] The anesthesia depth monitor collects the brain waves of a patient and analyzes the state to determine the degree of sedation, which mainly includes a data acquisition module, a data processing module and a display monitoring module. The data acquisition module is used for signal acquisition of brain waves, mainly including an electroencephalogram lead wire and a disposable non-invasive sensor. The sensor is provided with conductive glue inside, which bears the conductive connection function of the electrode and the human skin. However, the brain wave is very weak, only μV level, and is easily disturbed by the external electromagnetic environment (mobile phone, monitor, electrotome, etc.), resulting in poor data acquisition quality and monitoring accuracy. SUMMARY

[0003] Therefore, the present application solves the problem of the anesthesia depth monitor in the prior art that the brain wave is very weak, only μV level, and is easily disturbed by the external electromagnetic environment (mobile phone, monitor, electrotome, etc.), resulting in poor data acquisition quality and monitoring accuracy, thereby providing a data acquisition module and an anesthesia depth monitor.

[0004] To solve the above technical problems, the technical scheme of the present application is as follows: On the one hand, the present application provides a data acquisition module, which comprises an electroencephalogram lead wire and a sensor connected in series. The sensor is provided with conductive glue on the side in contact with the skin. The components of the conductive glue include water, 1, 2-propanediol, potassium chloride and polyacrylic acid sodium.

[0005] Further, the mass content of water in the conductive glue is 95%-96%; the mass content of 1, 2-propanediol in the conductive glue is 0.5%-1%; the mass content of potassium chloride in the conductive glue is 1%-2%; and the mass content of polyacrylic acid sodium in the conductive glue is 1.5%-2.5%.

[0006] Further, the mass content of water in the conductive glue is 95.5%; the mass content of 1, 2-propanediol in the conductive glue is 0.8%; the mass content of potassium chloride in the conductive glue is 1.2%; and the mass content of polyacrylic acid sodium in the conductive glue is 2.5%.

[0007] Further, the mass content of water in the conductive glue is 95%; the mass content of 1, 2-propanediol in the conductive glue is 1%; the mass content of potassium chloride in the conductive glue is 1.5%; and the mass content of polyacrylic acid sodium in the conductive glue is 2.5%.

[0008] Furthermore, the conductive adhesive contains 96% water by mass; 0.5% 1,2-propanediol by mass; 1% potassium chloride by mass; and 2.5% sodium polyacrylate by mass.

[0009] On the other hand, the present invention also provides an anesthesia depth monitoring device, including the data acquisition module described in any of the above claims.

[0010] Furthermore, the anesthesia depth monitoring device also includes a data processing module and a display interaction module; the data processing module is electrically connected to the data acquisition module and is used to process the EEG signal data acquired by the data acquisition module; the display interaction module is electrically connected to the data processing module and is used to display the EEG signal data processed by the data processing module.

[0011] Furthermore, the anesthesia depth monitoring device also includes a movable support and a clamp assembly; the movable support includes a support body and a device platform that is vertically mounted on the support body, the device platform being used to place the main body of the anesthesia depth monitoring device; the clamp assembly is mounted on the device platform and is used to fix the main body of the anesthesia depth monitoring device on the device platform.

[0012] Furthermore, the mobile support also includes a drive mechanism and a lifting mechanism: the drive mechanism is mounted on the support body, and the output end of the drive mechanism is connected to the lifting mechanism; the lifting mechanism is connected to the equipment platform, the drive mechanism drives the lifting mechanism to move, and the lifting mechanism drives the equipment platform to move synchronously.

[0013] Furthermore, the clamping assembly includes a first clamping plate, a second clamping plate, and a cylinder; the cylinder is disposed on the equipment platform; the first clamping plate and the second clamping plate are disposed facing each other and are both connected to the cylinder, and the cylinder drives the first clamping plate and the second clamping plate to move closer to each other or further away from each other.

[0014] The technical solution of this invention has the following advantages: The data acquisition module provided by this invention uses conductive adhesive composed of water, 1,2-propanediol, potassium chloride, and sodium polyacrylate. This type of conductive adhesive has optimized electrical properties, which can ensure efficient transmission of weak electroencephalogram (EEG) signals, enhance the monitoring accuracy of the anesthesia depth monitor, improve the long-term stability of the device, and enhance the safety of clinical use. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main body of the anesthesia depth monitoring device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the anesthesia depth monitoring device in use according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the movable support in the anesthesia depth monitoring device in an embodiment of the present invention; Figure 4 This is a schematic diagram of the clamp assembly in the anesthesia depth monitoring device according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Main body; 101. Sensor; 102. Conductive adhesive; 2. Mobile support frame; 201. Support frame body; 202. Drive mechanism; 203. Lifting mechanism; 204. Equipment platform; 3. Fixture assembly; 301. First clamping plate; 302. Second clamping plate; 303. Cylinder; 304. Slide rod; 305. Sliding base; 306. Rack; 307. Gear; 4. Operating table. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and defined, the terms "installation," "connection," and "joining" 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 the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] like Figure 1 As shown, this embodiment provides a data acquisition module, including connected EEG leads and a sensor 101. The side of the sensor 101 that contacts the skin is provided with conductive adhesive 102. The conductive adhesive 102 comprises water, 1,2-propanediol, potassium chloride, and sodium polyacrylate. Water acts as a solvent to dissolve the components and form a homogeneous system; 1,2-propanediol acts as a humectant to prevent moisture loss and increased impedance; potassium chloride acts as an ionic conductive agent to provide a conductive ion pathway; and sodium polyacrylate acts as a thickener and binder to enhance adhesion and system stability.

[0023] The data acquisition module provided in this embodiment uses conductive adhesive 102, which comprises water, 1,2-propanediol, potassium chloride, and sodium polyacrylate. This type of conductive adhesive 102 has optimized electrical properties, which can ensure efficient transmission of weak EEG signals, enhance the monitoring accuracy of the anesthesia depth monitor, the long-term stability of the device, and the safety of clinical use.

[0024] The main parameters for evaluating the electrical performance of conductive adhesive 102 include: AC impedance, DC offset voltage, recombination instability and internal noise, defibrillation overload recovery, and bias current tolerance. Existing conventional EEG sensors 101 use conductive adhesive 102 with high AC impedance, large DC offset voltage, significant recombination instability and internal noise, poor defibrillation overload recovery performance, insufficient bias current tolerance, and some formulations using non-aqueous systems, resulting in poor biocompatibility, skin irritation risk, and complex and costly manufacturing processes. Specifically, the existing conductive adhesive 102 using older formulations has the following values: AC impedance: 1000Ω; DC offset voltage: 50mV; recombination instability and internal noise: 40μV; defibrillation overload recovery: 35mV; bias current tolerance: 42mV.

[0025] The conductive adhesive 102 in this application has a water content ranging from 95% to 96% by mass; the conductive adhesive 102 has a 1,2-propanediol content ranging from 0.5% to 1% by mass; the conductive adhesive 102 has a potassium chloride content ranging from 1% to 2% by mass; and the conductive adhesive 102 has a sodium polyacrylate content ranging from 1.5% to 2.5% by mass.

[0026] With the new formula in the above embodiments, the AC impedance can be reduced to within 500Ω. The higher the AC impedance, the lower the signal strength, and the more difficult it is to transmit the acquired signal. Conversely, the lower the impedance, the easier the signal is to transmit, and the stronger the signal strength. With the new formula in the above embodiments, the DC offset voltage can be reduced to within 10mV. EEG waves are weak signals. When an amplifier is used to amplify a weak signal, the DC offset voltage is amplified, masking the useful signal. This causes the ADC sampling reference to shift, affecting measurement accuracy. The smaller the DC offset voltage, the weaker the masking of the useful signal, and the stronger the useful signal. With the new formula in the above embodiments, the internal noise can be reduced to within 10μV. Internal noise is a random fluctuation signal generated by the circuit itself. This signal hinders the transmission of EEG signals. Reducing internal noise will make the transmission of EEG signals more stable. With the new formula in the above embodiments, the defibrillation overload recovery can be reduced to within 20mV. Defibrillation overload recovery refers to the process by which a defibrillator (or its associated circuitry) quickly returns to normal operation after outputting a high-energy defibrillation pulse, avoiding device damage and ensuring reliable triggering on subsequent circuits. The core principles are dissipating residual energy, protecting critical components, and rapidly resetting the circuit. A smaller value indicates greater circuit stability. Using the new formulation in the above embodiments, the bias current tolerance can be achieved below 20mV. Bias current tolerance refers to the maximum allowable bias current for a circuit or component (such as an operational amplifier, sensor 101, or switching device) to operate stably over a long period. The core principle is to prevent excessive current from causing device overheating, performance drift, or functional failure. A smaller value indicates greater circuit stability. Therefore, by optimizing the composition and ratio of the conductive adhesive 102 in the above embodiments, the conductive adhesive 102 can achieve low impedance, low noise, and high stability electrical properties, while simultaneously improving its biocompatibility, reducing skin irritation, and ensuring efficient transmission of weak EEG signals.

[0027] The preparation process of conductive adhesive 102 in this embodiment is as follows: Weigh water, 1,2-propanediol, potassium chloride, and sodium polyacrylate by mass percentage; at room temperature, add water to a stirring container, turn on the stirring device (speed 300r / min-500r / min), slowly add 1,2-propanediol, and stir for 10min-15min until completely dissolved to form a uniform base liquid; while maintaining the stirring state, gradually add potassium chloride powder, and continue stirring for 15min-20min to ensure that the potassium chloride is completely dissolved and there are no particle residues; adjust the stirring speed to 600r / min-800r / min, slowly add sodium polyacrylate, and continue stirring for 30min-40min until the sodium polyacrylate is completely dispersed and dissolved, and the colloid forms a uniform viscous state; place the colloid in a vacuum degassing device, and degas for 10min-15min under a pressure of -0.08MPa to -0.1MPa to remove air bubbles in the system, and obtain the finished water-based conductive adhesive 102.

[0028] Example 1 Specifically, for example, when the mass content of water in the conductive adhesive 102 is 95.5%; the mass content of 1,2-propanediol in the conductive adhesive 102 is 0.8%; the mass content of potassium chloride in the conductive adhesive 102 is 1.2%; and the mass content of sodium polyacrylate in the conductive adhesive 102 is 2.5%: Preparation process: At room temperature, add 95.5g of water to a stirring container, turn on the stirring device (400r / min), add 0.8g of 1,2-propanediol, and stir for 12min until completely dissolved; add 1.2g of potassium chloride powder, and continue stirring for 18min until completely dissolved; adjust the speed to 700r / min, slowly add 2.5g of sodium polyacrylate, and stir for 35min until completely dissolved to form a uniform viscous colloid; place the colloid in a vacuum degassing device and degas for 12min under a pressure of -0.09MPa to obtain the finished conductive adhesive 102.

[0029] Performance test results: AC impedance: Under 10Hz and 100μA (peak-to-peak) conditions, the average impedance of 12 electrode pairs is 450Ω, and the maximum impedance of a single electrode pair is 1.7kΩ; DC offset voltage: 9.2mV after stabilization for 1 minute; Composite offset instability and internal noise: In the 0.15Hz-100Hz frequency band, the noise is 8.8μV (peak-to-peak) within 5 minutes; Defibrillation overload recovery: The polarization electromotive force is 16.5mV 5 seconds after discharge, and the residual polarization electromotive force transformation rate is +0.4mV / s within 30 seconds. The AC impedance at 10Hz after the test is 19Ω; Bias current tolerance: After applying a 200nA DC current for 8 hours, the voltage change is 17.3mV.

[0030] Example 2 Specifically, for example, when the mass content of water in the conductive adhesive 102 is 95%; the mass content of 1,2-propanediol in the conductive adhesive 102 is 1%; the mass content of potassium chloride in the conductive adhesive 102 is 1.5%; and the mass content of sodium polyacrylate in the conductive adhesive 102 is 2.5%: The preparation process can be the same as in Example 1.

[0031] Performance test results: AC impedance: The average impedance of 12 electrode pairs is 410Ω, and the maximum impedance of a single electrode pair is 1.5kΩ; DC offset voltage: 7.8mV after stabilization for 1 minute; Composite offset instability and internal noise: Noise of 7.9μV (peak-to-peak) within 5 minutes in the 0.15Hz-100Hz frequency band; Defibrillation overload recovery: The polarization electromotive force is 14.2mV 5 seconds after discharge, and the residual polarization electromotive force transformation rate is -0.3mV / s within 30 seconds. The AC impedance at 10Hz after the test is 16Ω; Bias current tolerance: After applying a 200nA DC current for 8 hours, the voltage change is 15.7mV.

[0032] Example 3 Specifically, for example, the conductive adhesive 102 contains 96% water by mass; 0.5% 1,2-propanediol by mass in the conductive adhesive 102; 1% potassium chloride by mass in the conductive adhesive 102; and 2.5% sodium polyacrylate by mass in the conductive adhesive 102.

[0033] The preparation process can be the same as in Example 1.

[0034] Performance test results: AC impedance: The average impedance of 12 electrode pairs is 480Ω, and the maximum impedance of a single electrode pair is 1.8kΩ; DC offset voltage: 9.8mV after stabilization for 1 minute; Composite offset instability and internal noise: In the 0.15Hz-100Hz frequency band, the noise is 9.5μV (peak-to-peak) within 5 minutes; Defibrillation overload recovery: The polarization electromotive force is 18.3mV 5 seconds after discharge, and the residual polarization electromotive force transformation rate is +0.5mV / s within 30 seconds. The AC impedance at 10Hz after the test is 20Ω; Bias current tolerance: After applying a 200nA DC current for 8 hours, the voltage change is 18.5mV.

[0035] The test results of the above embodiments all meet the design requirements, proving that the water-based conductive adhesive 102 in this application can be effectively applied to the electroencephalogram (EEG) acquisition of the anesthesia depth monitoring instrument, thereby improving the monitoring accuracy and equipment stability.

[0036] Another embodiment also provides an anesthesia depth monitoring device, including the data acquisition module described in any of the above embodiments.

[0037] This anesthesia depth monitoring device is similar to conventional anesthesia depth monitoring devices, including a data processing module and a display interaction module. The data processing module is electrically connected to the data acquisition module and has an embedded host and dedicated algorithm software, which can be used to process the EEG signal data acquired by the data acquisition module. The display interaction module is electrically connected to the data processing module and has a waveform display interface and a port for interfacing with the medical system, which can be used to display the EEG signal data processed by the data processing module.

[0038] like Figure 2 , Figure 3 , Figure 4 As shown, the anesthesia depth monitoring device also includes a movable support 2 and a clamp assembly 3; the movable support 2 includes a support body 201 and an equipment platform 204 that is vertically mounted on the support body 201, the equipment platform 204 is used to place the main body 1 of the anesthesia depth monitoring device; the clamp assembly 3 is mounted on the equipment platform 204 and is used to fix the main body 1 of the anesthesia depth monitoring device on the equipment platform 204.

[0039] like Figure 3 As shown, the movable support 2 further includes a drive mechanism 202 and a lifting mechanism 203: the drive mechanism 202 is mounted on the support body 201, and its output end is connected to the lifting mechanism 203; the lifting mechanism 203 is connected to the device platform 204, the drive mechanism 202 drives the lifting mechanism 203 to move, and the lifting mechanism 203 drives the device platform 204 to move synchronously. For example, casters can be provided at the bottom of the support body 201 for easy movement. For example, the drive mechanism 202 can be a combination of a motor, a lead screw, and a nut to provide power to the lifting mechanism 203. For example, the lifting mechanism 203 can be a combination of a slider and a slide rail. The slide rail can be mounted on the support body 201, and the slider can be slidably mounted on the slide rail. The device platform 204 is connected to the slider, and under the drive of the drive mechanism 202, the slider moves up and down along the slide rail, thereby driving the device platform 204 to rise and fall, so as to adjust the height of the main body 1 of the anesthesia depth monitoring instrument. like Figure 4As shown, the clamping assembly 3 includes a first clamping plate 301, a second clamping plate 302, and a cylinder 303. The cylinder 303 is mounted on the equipment platform 204. The first clamping plate 301 and the second clamping plate 302 face each other and are both connected to the cylinder 303. The cylinder 303 drives the first clamping plate 301 and the second clamping plate 302 to move closer or further apart. For example, the cylinder 303 can be mounted on the bottom surface of the equipment platform 204, and the two sides of the equipment platform 204 have grooves to accommodate the first clamping plate 301 and the second clamping plate 302. For example, both the first clamping plate 301 and the second clamping plate 302 have sliding bases 305, and the bottom surface of the equipment platform 204 can be provided with a sliding rod 304. The first clamping plate 301 and the second clamping plate 302 are slidably mounted on the sliding rod 304 via the sliding bases 305. For example, the telescopic head of cylinder 303 can be connected to the sliding base 305 of the first clamping plate 301. The sliding base 305 of the first clamping plate 301 and the second clamping plate 302 can be linked by gears 307 and racks 306. When cylinder 303 drives the first clamping plate 301 to move, it can simultaneously drive the second clamping plate 302 to move. With this configuration, the main body 1 of the anesthesia depth monitoring device can be fixed on the equipment platform 204, improving stability.

[0040] In use, the user can lie on the operating table 4, with the mobile support 2 located at the head of the bed. The anesthesia depth monitor is placed on the mobile support 2 and clamped by the clamp assembly 3. Then, the sensor 101 is connected to the user's head to collect brainwave data.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to cover all possible implementations. Those skilled in the art will recognize that various variations and modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations and modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A data acquisition module, comprising connected electroencephalogram (EEG) leads and a sensor (101), wherein the side of the sensor (101) for contact with skin is provided with conductive adhesive (102); characterized in that, The conductive adhesive (102) comprises water, 1,2-propanediol, potassium chloride, and sodium polyacrylate.

2. The data acquisition module according to claim 1, characterized in that, The water content in the conductive adhesive (102) ranges from 95% to 96% by mass; The conductive adhesive (102) contains 0.5%-1% by mass of 1,2-propanediol. The mass content of potassium chloride in the conductive adhesive (102) ranges from 1% to 2%. The mass content of sodium polyacrylate in the conductive adhesive (102) ranges from 1.5% to 2.5%.

3. The data acquisition module according to claim 2, characterized in that, The conductive adhesive (102) contains 95.5% water by mass. The conductive adhesive (102) contains 0.8% 1,2-propanediol by mass. The conductive adhesive (102) contains 1.2% potassium chloride by mass. The conductive adhesive (102) contains 2.5% sodium polyacrylate by mass.

4. The data acquisition module according to claim 2, characterized in that, The conductive adhesive (102) contains 95% water by mass. The conductive adhesive (102) contains 1% 1% 1% by mass of 1,2-propanediol. The conductive adhesive (102) contains 1.5% potassium chloride by mass. The conductive adhesive (102) contains 2.5% sodium polyacrylate by mass.

5. The data acquisition module according to claim 2, characterized in that, The conductive adhesive (102) contains 96% water by mass. The conductive adhesive (102) contains 0.5% 1,2-propanediol by mass. The conductive adhesive (102) contains 1% potassium chloride by mass. The conductive adhesive (102) contains 2.5% sodium polyacrylate by mass.

6. An anesthesia depth monitoring device, characterized in that, Includes the data acquisition module as described in any one of claims 1-5.

7. The anesthesia depth monitoring device according to claim 6, characterized in that, It also includes a data processing module and a display interaction module; The data processing module is electrically connected to the data acquisition module and is used to process the electroencephalogram (EEG) signal data acquired by the data acquisition module. The display interaction module is electrically connected to the data processing module and is used to display the EEG signal data processed by the data processing module.

8. The anesthesia depth monitoring device according to claim 6, characterized in that, It also includes a movable support (2) and a clamp assembly (3); The mobile support (2) includes a support body (201) and an equipment platform (204) that is vertically mounted on the support body (201). The equipment platform (204) is used to place the main body (1) of the anesthesia depth monitoring instrument. The clamp assembly (3) is disposed on the equipment platform (204) for fixing the main body (1) of the anesthesia depth monitoring instrument on the equipment platform (204).

9. The anesthesia depth monitoring device according to claim 8, characterized in that, The movable support (2) also includes a drive mechanism (202) and a lifting mechanism (203): The drive mechanism (202) is mounted on the support body (201), and the output end of the drive mechanism (202) is connected to the lifting mechanism (203). The lifting mechanism (203) is connected to the equipment platform (204), the driving mechanism (202) drives the lifting mechanism (203) to move, and the lifting mechanism (203) drives the equipment platform (204) to move synchronously.

10. The anesthesia depth monitoring device according to claim 8, characterized in that, The clamping assembly (3) includes a first clamping plate (301), a second clamping plate (302), and a cylinder (303); The cylinder (303) is mounted on the equipment platform (204); The first clamping plate (301) and the second clamping plate (302) are arranged facing each other and are both connected to the cylinder (303). The cylinder (303) drives the first clamping plate (301) and the second clamping plate (302) to move closer to each other or further away from each other.

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