Fetal heart rate monitoring equipment based on flexible electrode

Abstract

The utility model discloses fetal heart monitoring equipment based on a flexible electrode, which belongs to the technical field of fetal heart monitoring equipment and comprises a fetal heart monitoring component and a receiving terminal. The fetal heart monitoring assembly comprises a fetal heart monitoring base, a silica gel substrate fixedly connected to the fetal heart monitoring base and a flexible detection module. The flexible detection module comprises four flexible detection electrodes which are distributed in an array; a main control board, a wireless transmission module, a filter, a signal amplifier, an alarm module and a battery are arranged in the fetal heart monitoring base. The fetal heart monitoring equipment based on the flexible electrode integrates fetal heart, blood pressure, uterine contraction pressure and temperature detection functions at the same time, is highly integrated, soft, light and thin and has high sensitivity, and the adaptability to different people is enhanced; the accuracy of signal extraction is improved through multi-electrode preprocessing and signal amplification, filtering and analysis, and a related alarm function is provided, so that pregnant women or medical staff can take necessary measures in time.

Description

Technical Field

[0001] This utility model relates to the field of fetal heart rate monitoring equipment technology, specifically a fetal heart rate monitoring device based on flexible electrodes. Background Technology

[0002] Fetal heart rate monitoring is regulated by the sympathetic and parasympathetic nervous systems. By recording instantaneous changes in fetal heart rate, a monitoring curve can be created to understand the fetal heart rate response during fetal movement and uterine contractions, thus inferring whether the fetus is experiencing intrauterine hypoxia. Uterine contractions, the regular contractions of the uterus, are an important monitoring indicator in prenatal checkups. Regular uterine contractions are the main sign of impending labor. The contraction curve in contraction monitoring records the rate of increase and decrease in contraction pressure, the peak pressure, the duration, and the interval between contractions. Uterine contractions can cause the fetal heart rate to increase or decrease, and the quality of contractions directly affects fetal heart rate activity and delivery.

[0003] Currently used fetal heart rate monitoring devices typically employ an abdominal binder to fix a pressure sensor to the pregnant woman's abdomen. The pressure sensor signal is then transmitted via cable to another display unit to display the fetal heart rate curve in real time, which helps obstetric nurses make clinical judgments. However, the cable connection method may restrict the pregnant woman's movement and may create unnecessary risks due to cable entanglement. Moreover, the aforementioned devices can only detect the fetal heart rate at a time, making their function relatively limited. Utility Model Content

[0004] This invention provides a fetal heart rate monitoring device based on flexible electrodes, aiming to solve the problems mentioned in the background art, such as the restriction of pregnant women's movement due to the use of cable connection, the potential for unnecessary risks caused by cable entanglement, and the fact that the above-mentioned devices can only detect fetal heart rate at a time, resulting in a relatively limited function.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fetal heart rate monitoring device based on flexible electrodes, comprising a fetal heart rate monitoring component and a receiving terminal; the fetal heart rate monitoring component includes a fetal heart rate monitoring base, a silicone substrate fixedly connected to the fetal heart rate monitoring base, and a flexible detection module pressed onto the bottom of the silicone substrate by screen printing; the flexible detection module includes four flexible detection electrodes arranged in an array; the four flexible detection electrodes are, in order, a fetal heart rate detection electrode, a uterine contraction detection electrode, a blood pressure detection electrode, and a temperature detection electrode; the fetal heart rate monitoring base has a built-in main... The system includes a control board, a wireless transmission module, a filter, a signal amplifier, an alarm module, and a battery for supplying power to the main control board, the wireless transmission module, the filter, the signal amplifier, and the alarm module. The flexible detection electrode comprises a sandwich structure formed by two layers of liquid metal ink and a hydrogel filled between the two layers of liquid metal ink. The flexible detection module is electrically connected to the signal amplifier, the signal amplifier is electrically connected to the filter, the filter is electrically connected to the main control board, the main control board is wirelessly connected to the receiving terminal through the wireless transmission module, and the main control board is electrically connected to the alarm module.

[0006] During operation, a silicone substrate is attached to the pregnant woman's abdomen near the fetal heart. Data on fetal heart rate, uterine contraction pressure, blood pressure, and temperature are collected sequentially through four flexible detection electrodes. The electrical signals are amplified by a signal amplifier and then transmitted to a filter. After being filtered, the signals are transmitted to the main control board, which transmits the signals to the receiving terminal via a wireless transmission module, greatly improving the efficiency of signal transmission and ease of use.

[0007] The aforementioned flexible detection electrode for collecting fetal electrocardiogram signals is made of non-toxic hydrogel and a novel liquid metal with high plasticity and high conductivity, and has high ductility, high corrosion resistance, high conductivity and high adhesion. By using a novel hydrogel based on AM (acrylamide) with the addition of MBA (2-mercaptobenzoic acid), APS (ammonium persulfate) and carbon nanotube aqueous dispersion to fabricate the flexible detection electrode, it has stronger tensile and conductive properties, is easier to prepare, has a shorter preparation cycle, is not complicated, and has no toxic side effects.

[0008] Preferably, the liquid metal ink is prepared by mixing polyvinylpyrrolidone (PVP) and ethanol to form a PVP solution, and then adding liquid metal (gallium indium alloy) to form the ink.

[0009] Preferably, the silicone substrate is prepared by mixing Ecoflex (an elastic and environmentally friendly material) and AB glue in equal proportions, pouring the mixture onto an ABS release plate, and centrifuging and rotating it.

[0010] Preferably, the hydrogel uses acrylamide as a base and carbon nanotubes are sprayed onto the base as a conductive layer, exhibiting excellent conductivity and elongation.

[0011] Preferably, the wireless transmission module is a Bluetooth module or a WiFi module.

[0012] Preferably, the alarm module is an electromagnetic buzzer.

[0013] Preferably, a triangular edge is integrally connected to one side of the silicone substrate.

[0014] Preferably, the receiving terminal is a mobile phone or a computer.

[0015] This flexible electrode-based fetal heart rate monitoring device is simple in structure and easy to use. It integrates fetal heart rate, blood pressure, uterine contraction pressure, and temperature detection functions. Compared with traditional fetal heart rate monitoring devices, this device is highly integrated, flexible, thin, and highly sensitive. It also innovatively incorporates liquid metal wires to enhance its adaptability to different people. In terms of signal processing, it uses multi-electrode preprocessing and signal amplification, filtering, and analysis to improve the accuracy of signal extraction. It displays the fetal heart rate in real time through wireless transmission and big data analysis, and provides relevant alarm functions so that pregnant women or medical personnel can take necessary measures in a timely manner. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a fetal heart rate monitoring device based on flexible electrodes.

[0017] Figure 2 This is a schematic diagram showing the distribution of the flexible detection module in a fetal heart rate monitoring device based on flexible electrodes;

[0018] Figure 3 This is a schematic cross-sectional view of a flexible detection electrode in a fetal heart rate monitoring device based on a flexible electrode.

[0019] Figure 4 This is a schematic diagram illustrating the working principle of a fetal heart rate monitoring device based on flexible electrodes.

[0020] In the picture:

[0021] 1. Fetal heart rate monitoring component; 101. Triangular edge; 11. Fetal heart rate monitoring base; 12. Silicone substrate; 13. Flexible detection module;

[0022] 111. Main control board; 112. Wireless transmission module; 113. Filter; 1301. Liquid metal ink; 1302. Hydrogel; 114. Signal amplifier; 115. Alarm module; 116. Battery;

[0023] 2. Receiving terminal; Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This embodiment provides a fetal heart rate monitoring device based on flexible electrodes, such as... Figures 1 to 4 As shown, the fetal heart rate monitoring device based on flexible electrodes includes a fetal heart rate monitoring component 1 and a receiving terminal 2. The fetal heart rate monitoring component 1 includes a fetal heart rate monitoring base 11, a silicone substrate 12 fixedly connected to the fetal heart rate monitoring base 11, and a flexible detection module 13 pressed onto the bottom of the silicone substrate 12 by screen printing. The flexible detection module 13 includes four flexible detection electrodes 131 arranged in an array. The four flexible detection electrodes 131 are, in order, a fetal heart rate detection electrode, a uterine contraction detection electrode, a blood pressure detection electrode, and a temperature detection electrode. The fetal heart rate monitoring base 11 has a built-in main control board 111, a wireless transmission module 112, a filter 113, a signal amplifier 114, an alarm module 115, and a device for transmitting signals to the receiver. The main control board 111, the wireless transmission module 112, the filter 113, the signal amplifier 114, and the alarm module 115 are powered by a battery 116; the flexible detection electrode 131 includes a sandwich structure formed by two layers of liquid metal ink 1301 and a hydrogel 1302 filled between the two layers of liquid metal ink 1301; the flexible detection module 13 is electrically connected to the signal amplifier 114, the signal amplifier 114 is electrically connected to the filter 113, the filter 113 is electrically connected to the main control board 111, the main control board 111 is wirelessly connected to the receiving terminal 2 through the wireless transmission module 112, and the main control board 111 is electrically connected to the alarm module 115.

[0026] During operation, the silicone substrate 12 is attached to the pregnant woman's abdomen near the fetal heart. Data on fetal heart rate, uterine contraction pressure, blood pressure, and temperature are collected sequentially through four flexible detection electrodes 131. The electrical signals are amplified by the signal amplifier 114 and then transmitted to the filter 113. After being filtered by the filter 113, the signals are transmitted to the main control board 111. The main control board 111 transmits the signals to the receiving terminal 2 through the wireless transmission module 112, which greatly improves the efficiency of signal transmission and the ease of use.

[0027] The flexible detection electrode 131 used to collect fetal electrocardiogram signals is made of non-toxic hydrogel 1302 and a novel liquid metal ink 1301 with high plasticity and high conductivity. It has high ductility, high corrosion resistance, high conductivity and high adhesion. By using a novel hydrogel 1302 with AM (acrylamide) as the base and adding MBA (2-mercaptobenzoic acid), APS (ammonium persulfate) and carbon nanotube aqueous dispersion to make the flexible detection electrode 131, it has stronger tensile and conductive properties, is easier to prepare, has a shorter preparation cycle, is not complicated, and has no toxic side effects.

[0028] In one embodiment, the liquid metal ink 1301 is prepared by mixing polyvinylpyrrolidone (PVP) with ethanol to prepare a PVP solution, and then adding liquid metal (gallium indium alloy).

[0029] In this embodiment, refer to Figure 3 The novel liquid metal ink 1301 has high ductility, high corrosion resistance, high conductivity and high adhesion.

[0030] In one embodiment, the silicone substrate 12 is prepared by mixing Ecoflex (an elastic and environmentally friendly material) and AB glue in equal proportions, pouring the mixture onto an ABS release plate, and centrifugally rotating it.

[0031] In this embodiment, refer to Figure 1 and Figure 2 The silicone substrate 12 is soft and thin, has good adaptability to the human body surface, and is environmentally friendly with no toxic side effects on the human body.

[0032] In one embodiment, the hydrogel 1302 uses acrylamide as a base and carbon nanotubes are sprayed onto the base as a conductive layer, exhibiting excellent conductivity and elongation.

[0033] In this embodiment, refer to Figure 3 Hydrogel 1302 has excellent conductivity and elongation to enable high strain sensing.

[0034] In one embodiment, the wireless transmission module 112 is a Bluetooth module or a WiFi module.

[0035] In this embodiment, refer to Figure 4 It transmits signals to mobile phones or computers via Bluetooth or WiFi modules, greatly improving signal transmission efficiency and ease of use.

[0036] In one embodiment, the alarm module 115 is an electromagnetic buzzer.

[0037] In this embodiment, refer to Figure 4When the flexible detection electrode 131 detects a fetal heart rate, uterine contraction pressure, blood pressure, or body temperature signal that exceeds the normal threshold, the electromagnetic buzzer will sound an alarm to remind medical staff or the pregnant woman's family.

[0038] In one embodiment, a triangular gusset 101 is integrally connected to one side of the silicone substrate 12.

[0039] In this embodiment, refer to Figure 4 The triangular peeling edge 101 facilitates the removal of the silicone substrate 12 after the test is completed.

[0040] In one embodiment, the receiving terminal 2 is a mobile phone or a computer.

[0041] In this embodiment, refer to Figure 4 It transmits signals to mobile phones or computers via Bluetooth or WiFi modules, greatly improving the efficiency of signal transmission and ease of use.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fetal heart monitoring device based on flexible electrodes, comprising a fetal heart monitoring component (1) and a receiving terminal (2). characterized in that The fetal heart monitoring component (1) includes a fetal heart monitoring base (11), a silicone substrate (12) fixedly connected to the fetal heart monitoring base (11), and a flexible detection module (13) pressed onto the bottom of the silicone substrate (12) by screen printing. The flexible detection module (13) includes four flexible detection electrodes (131) arranged in an array. The four flexible detection electrodes (131) are, in order, a fetal heart rate detection electrode, a uterine contraction detection electrode, a blood pressure detection electrode, and a temperature detection electrode; The fetal heart monitoring base (11) has a built-in main control board (111), a wireless transmission module (112), a filter (113), a signal amplifier (114), an alarm module (115), and a battery (116) for supplying power to the main control board (111), the wireless transmission module (112), the filter (113), the signal amplifier (114), and the alarm module (115). The flexible detection electrode (131) includes a sandwich structure formed by two layers of liquid metal ink (1301) and a hydrogel (1302) filled between the two layers of liquid metal ink (1301). The flexible detection module (13) is electrically connected to the signal amplifier (114), the signal amplifier (114) is electrically connected to the filter (113), the filter (113) is electrically connected to the main control board (111), the main control board (111) is wirelessly connected to the receiving terminal (2) through the wireless transmission module (112), and the main control board (111) is electrically connected to the alarm module (115).

2. The flexible electrode-based fetal monitoring device of claim 1, wherein: The liquid metal ink (1301) is prepared by mixing polyvinylpyrrolidone and ethanol to prepare a PVP solution, and then adding liquid metal.

3. The flexible electrode-based fetal monitoring device of claim 1, wherein: The silicone substrate (12) is prepared by mixing an elastic environmentally friendly material and AB glue in equal proportions, pouring the mixture onto an ABS release plate, and centrifuging and rotating it.

4. The flexible electrode-based fetal monitoring device of claim 1, wherein: The hydrogel (1302) uses acrylamide as a base and carbon nanotubes are sprayed onto the base as a conductive layer, exhibiting excellent conductivity and elongation.

5. The flexible electrode-based fetal monitoring device of claim 1, wherein: The wireless transmission module (112) is a Bluetooth module or a WiFi module.

6. The fetal heart rate monitoring device based on flexible electrodes according to claim 1, characterized in that: The alarm module (115) is an electromagnetic buzzer.

7. The flexible electrode-based fetal monitoring device of claim 1, wherein: A triangular edge (101) is integrally connected to one side of the silicone substrate (12).

8. The flexible electrode-based fetal monitoring device of claim 1, wherein: The receiving terminal (2) is a mobile phone or a computer.

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