Uterine contraction monitoring patch and device based on flexible stretching perception

Abstract

The utility model relates to the technical field of medical monitoring devices, in particular to a uterine contraction monitoring patch and device based on flexible stretching perception, which comprises a polyurethane elastic plastic package layer including an upper polyurethane elastic plastic package layer and a lower polyurethane elastic plastic package layer, the upper polyurethane elastic plastic package layer and the lower polyurethane elastic plastic package layer are connected with each other to form a polyurethane elastic plastic package cavity; the flexible tensile strain sensor is arranged in the polyurethane elastic plastic package cavity to form a flexible stretchable sensing front end; the substrate adhesion layer comprises an upper substrate adhesion layer and a lower substrate adhesion layer, the upper substrate adhesion layer and the lower substrate adhesion layer are connected with each other to form a substrate adhesion plastic package cavity, and the substrate adhesion plastic package cavity is used for carrying out plastic package on the flexible stretchable sensing front end to form the uterine contraction monitoring patch. The patch utilizes the flexible sensor technology to accurately capture uterine contraction signals, and can provide non-inductive signal acquisition for pregnant women.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical monitoring device technical field especially, it relates to a kind of based on flexible tensile perception's uterine contraction monitoring patch and device. BACKGROUND

[0002] The strength and frequency of uterine contraction can reveal the progress of labor, which is of great significance for judging the delivery condition of pregnant women.

[0003] Clinically, the toco is the most common method of uterine contraction monitoring, and its principle is to fix the pressure sensing device on the abdomen of pregnant women, to feel the pressure change of abdominal wall during uterine contraction and record the uterine contraction curve. Although this method has the advantages of non-invasiveness and convenient operation, it also has certain limitations. For example, the signal monitored by the toco is easily affected by the body type of pregnant women (such as those with high BMI) and body position change, which may cause signal distortion. In addition, since the device needs to be fixed tightly on the abdomen by a belt, it may cause discomfort to pregnant women, especially in the case of long-term monitoring, which affects the comfort and tolerance of pregnant women. Most of the current uterine contraction monitoring devices are large in size and complex in structure, and need to be operated and interpreted by professional personnel, which limits their home use.

[0004] In recent years, flexible sensor technology has developed rapidly and is gradually widely used in the medical field. These flexible sensors not only can accurately perceive the subtle changes of muscle contraction and surface pressure, realize the monitoring of pulse and respiration, but also have high ductility and biocompatibility, so they can be directly attached to the surface of internal organs for monitoring dynamic moving organs. Its flexible design can effectively avoid the discomfort caused to patients by traditional monitoring devices and provide continuous and real-time physiological data acquisition. However, how to apply it to the uterine contraction monitoring of pregnant women, especially without affecting the comfort of pregnant women after being attached to the abdomen, is a problem that needs to be solved at present. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the problems of the prior art, and provides a uterine contraction monitoring patch and device based on flexible tensile perception, to solve the technical problems that the current toco needs to be fixed tightly on the abdomen by a belt, which may cause discomfort to pregnant women, especially in the case of long-term monitoring, affecting the comfort and tolerance of pregnant women, and that professional uterine contraction monitoring devices are large in size and complex in structure, need to be operated and interpreted by professional personnel, thereby limiting their home use.

[0006] The above-mentioned purpose is achieved by the following technical solutions:

[0007] A uterine contraction monitoring patch based on flexible tensile perception, comprising:

[0008] A polyurethane elastic plastic sealing layer, comprising an upper polyurethane elastic plastic sealing layer and a lower polyurethane elastic plastic sealing layer, which are connected to each other to form a polyurethane elastic plastic sealing cavity;

[0009] A flexible tensile strain sensor arranged in the polyurethane elastic plastic sealing cavity to form a flexible and stretchable sensing front end;

[0010] A substrate adhesion layer, comprising an upper substrate adhesion layer and a lower substrate adhesion layer, which are connected to each other to form a substrate adhesion plastic sealing cavity for plastic sealing of the flexible and stretchable sensing front end to form the uterine contraction monitoring patch.

[0011] Further, the polyurethane elastic plastic sealing layer is a functional coating or sealing layer made of polyurethane elastomer as a base material.

[0012] Further, the substrate adhesion layer is a substrate adhesion layer made of organic silicone adhesive and sterile pure cotton cloth.

[0013] A uterine contraction monitoring device based on flexible and stretchable sensing, comprising at least one uterine contraction monitoring patch fixed to the abdomen of a pregnant woman for sensing and capturing the skin stretch change of the pregnant woman during uterine contraction to obtain uterine contraction signals; and further comprising:

[0014] A housing capable of being bonded with the upper substrate adhesion layer and having an installation cavity inside;

[0015] A collection module installed in the installation cavity and comprising a PCB board, a signal processing unit, a data transmission unit, a power management unit and a display unit connected in sequence; the PCB board is further electrically connected with the flexible tensile strain sensor in the uterine contraction detection patch;

[0016] The signal processing unit is configured to receive the uterine contraction signals collected by the flexible tensile strain sensor and perform preprocessing;

[0017] The data transmission unit is configured to transmit the preprocessed uterine contraction signals to a mobile phone terminal;

[0018] The power management unit is configured to provide power supply;

[0019] The display unit is configured to display the content and status.

[0020] Further, the signal processing unit comprises a microprocessor, a sensor interface circuit, a signal amplification circuit, an analog-digital conversion circuit and a filter noise reduction circuit connected with each other.

[0021] Further, the data transmission unit is any one of a Wi-Fi wireless communication module, a Bluetooth low energy communication module, a 4G communication module, a 5G communication module, or a Zig-Bee wireless communication module.

[0022] Further, the display unit includes an LED electronic screen embedded on the shell and used for displaying content and status.

[0023] Further, the power management unit includes a lithium battery, a power management circuit, and a charging interface embedded on the shell.

[0024] Further, the four uterine contraction monitoring patches are connected to each other to form a cross shape, and the center of the cross shape is bonded to the center of the bottom of the shell.

[0025] The uterine contraction monitoring patch based on flexible stretching sensing provided by the utility model accurately captures uterine contraction signals by using flexible sensor technology, has a flexible material with biological compatibility, avoids causing skin allergy and other adverse effects to provide a "non-sensing" signal collection for pregnant women, avoids affecting the daily life of pregnant women. At the same time, the operation is simple, the device is small in size, and home uterine contraction measurement can be realized. Compared with high-precision and expensive medical-grade devices in hospitals, the device meets the basic clinical needs in performance, controls the production and maintenance cost within a reasonable range, and enables more pregnant women to afford and benefit. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic view of a uterine contraction monitoring patch based on flexible stretching sensing and a device according to the utility model;

[0027] Figure 2 FIG. 2 is a structural schematic view of a flexible stretchable sensing front end of the uterine contraction monitoring patch based on flexible stretching sensing according to the utility model;

[0028] Figure 3 FIG. 3 is a schematic view of the connection between the flexible stretchable sensing front end and a base adhesive layer in the uterine contraction monitoring patch based on flexible stretching sensing according to the utility model;

[0029] Figure 4 FIG. 4 is a top view of the uterine contraction monitoring device based on flexible stretching sensing according to the utility model;

[0030] Figure 5 FIG. 5 is an exploded view of the uterine contraction monitoring device based on flexible stretching sensing according to the utility model.

[0031] FIG. 1 is a structural schematic view of a uterine contraction monitoring patch based on flexible stretching sensing and a device according to the utility model;

[0032] 1-uterine contraction monitoring patch;

[0033] 2-polyurethane elastic plastic encapsulation layer, 201-upper polyurethane elastic plastic encapsulation layer, 202-lower polyurethane elastic plastic encapsulation layer, 203-polyurethane elastic plastic encapsulation cavity;

[0034] 3-substrate adhesion layer, 301-upper substrate adhesion layer, 302-lower substrate adhesion layer, 303-substrate adhesion plastic encapsulation cavity;

[0035] 4-flexible stretchable strain sensor, 401-liquid metal conductor printed circuit;

[0036] 5-flexible stretchable sensing front end;

[0037] 6-acquisition module, 601-PCB board, 602-signal processing unit, 603-data transmission unit, 604-power management unit, 605-display unit, 606-LED electronic screen, 607-charging interface;

[0038] 7-housing. DETAILED DESCRIPTION

[0039] The utility model will be further described in detail below according to the drawings and examples. The described example is only a part of the utility model example, and is not all examples. Based on the example in the utility model, all other examples obtained by the person skilled in the art without making creative labor belong to the scope of the utility model protection.

[0040] As shown in Figure 2 and Figure 3 , the present scheme provides a flexible stretch sensing contraction monitoring patch, which comprises:

[0041] A polyurethane elastic plastic encapsulation layer 2 comprises an upper polyurethane elastic plastic encapsulation layer 201 and a lower polyurethane elastic plastic encapsulation layer 202, and the upper polyurethane elastic plastic encapsulation layer 201 and the lower polyurethane elastic plastic encapsulation layer 202 form a polyurethane elastic plastic encapsulation cavity 203 after being connected with each other;

[0042] A flexible stretchable strain sensor 4 is arranged in the polyurethane elastic plastic encapsulation cavity 203 matched with the shape, to form a flexible stretchable sensing front end 5;

[0043] A substrate adhesion layer 3 comprises an upper substrate adhesion layer 301 and a lower substrate adhesion layer 302, and the upper substrate adhesion layer 301 and the lower substrate adhesion layer 302 form a substrate adhesion plastic encapsulation cavity 303 matched with the shape of the flexible stretchable sensing front end 5 after being connected with each other, to encapsulate the flexible stretchable sensing front end 5, and form the contraction monitoring patch 1.

[0044] The type of the flexible stretch strain sensor 4 in the scheme includes piezoresistive sensor, capacitive sensor, piezoelectric sensor and triboelectric sensor, etc., wherein:

[0045] The piezoresistive sensor is based on the characteristic that the resistance of the material changes with strain, such as the fracture of the conductive network of carbon black / elastomer composite material when stretched, resulting in a change in resistance, and has the characteristics of high sensitivity;

[0046] The capacitive sensor is caused by the change of the electrode spacing or the contact area, for example, the three-dimensional paper structure electrode is unfolded when stretched, and has the characteristics of good linearity and low hysteresis;

[0047] The piezoelectric sensor is based on the characteristic that the piezoelectric material such as PVDF generates electric charge under stress, and has the characteristics of high frequency response;

[0048] The triboelectric sensor is to convert mechanical energy into electrical energy through the triboelectric effect, which is self-powered and has the characteristics of not needing external power supply.

[0049] The piezoresistive sensor is preferred in the embodiment, which is composed of a liquid metal conductor printed circuit 401; the resistance change rate of the sensor has an approximate linear relationship with strain, so that the change of resistance caused by the deformation of skin stretching during contraction can be mapped to the contraction pressure.

[0050] The polyurethane elastic plastic sealing layer 2 in the embodiment is a functional coating or sealing layer made of polyurethane elastomer PU as the base material. Such material forms a block structure through the urethane group -NHCOO- in the molecular chain, combines the microphase separation characteristics of soft segment flexible chain and hard segment rigid chain, and gives it unique physical and chemical properties, which is a product that can be directly purchased on the market. The double-layer polyurethane elastic plastic sealing layer 2 is used in the embodiment to package the flexible stretch strain sensor 4, forming a sandwich-like structure, which encapsulates the flexible stretch strain sensor 4 and reduces external interference while maintaining the stretchable characteristics of the sensor itself.

[0051] The base adhesive layer 3 in this embodiment is a base adhesive layer made of silicone adhesive and sterile pure cotton cloth, which is a composite structure combining high-performance silicone material and natural textile. Through the synergistic effect of silicone and pure cotton cloth, the balance of functionality and safety is achieved, which is irreplaceable in medical, sports protection and other scenarios. Among them, the silicone adhesive is non-toxic and harmless after curing, which meets the medical grade material standard and is suitable for direct contact with human skin, such as band-aid, medical tape, etc. The air permeability of sterile pure cotton cloth combined with the flexible and elastic elongation of silicone adhesive can reach more than 300%, which can reduce the risk of skin irritation and allergy. Through the base adhesive layer, the entire device can be better attached to the abdomen of the pregnant woman, ensuring that the patch is comfortable and stable, avoiding skin irritation, and allowing the pregnant woman to wear it for a long time without feeling.

[0052] As shown in Figure 1 、 4 and 5, the present scheme also provides a flexible stretch sensing based contraction monitoring device, which comprises at least one of the above-mentioned contraction monitoring patches 1, the contraction monitoring patch 1 is fixed to the abdomen of the pregnant woman, used for sensing and capturing the skin stretch change of the pregnant woman during contraction, and obtaining the contraction signal; further comprising:

[0053] a shell 7, which can be bonded with the upper base adhesive layer 301, and has a mounting cavity inside; the shell 7 is a resin shell, which can provide dustproof and waterproof protection for the inside of the mounting cavity;

[0054] a collection module 6, which is installed in the mounting cavity and comprises a PCB board 601, a signal processing unit 602, a data transmission unit 603, a power management unit 604 and a display unit 605 connected in sequence; the PCB board 601 is also electrically connected with the flexible stretch strain sensor 4 in the contraction detection patch 1;

[0055] Specifically, the signal processing unit 602 is used to receive the contraction signal collected by the flexible stretch strain sensor 4 and perform preprocessing;

[0056] the data transmission unit 603 is used to transmit the preprocessed contraction signal to the mobile phone mobile terminal;

[0057] the power management unit 604 is used to provide power supply;

[0058] the display unit 605 is used to display the content and state.

[0059] The signal processing unit 602 in the embodiment includes a microprocessor, a sensor interface circuit, a signal amplification circuit, an analog-digital conversion circuit, a filter noise reduction circuit, etc. connected to each other, for collecting and processing the collected original uterine contraction signal, amplifying the uterine contraction signal captured by the front end, and performing preliminary signal processing on the original signal to remove unnecessary noise interference and ensure the accuracy and stability of the signal, and finally output a clear signal for further analysis.

[0060] Specifically, the amplification circuit is connected to the flexible stretchable strain sensor, amplifies the weak uterine contraction signal captured from the sensor, and ensures that the signal can be transmitted to the subsequent processing unit; and the microprocessor is responsible for signal sampling, device configuration, data processing, etc., and samples the uterine contraction signal at a frequency of 20Hz through the built-in 12 bit ADC.

[0061] Since the microprocessor, sensor interface circuit, signal amplification circuit, analog-digital conversion circuit, and filter noise reduction circuit in the above-mentioned collection module 6 can be directly implemented by using the circuit structure in the prior art, the specific structure of the circuit is not described herein.

[0062] The data transmission unit 603 in the embodiment is any one of a Wi-Fi wireless communication module, a Bluetooth Low Energy (BLE) communication module, a 4G communication module, a 5G communication module, and a Zig-Bee wireless communication module.

[0063] In addition, the display unit 605 includes an LED electronic screen 606 embedded on the shell, for displaying the content and state, and the display content includes the current uterine contraction intensity, a prompt of the current device power, a display of the connection state between the device and the mobile phone, etc.

[0064] The power management unit 604 in the embodiment includes a lithium battery, a power management circuit, and a charging interface 607 embedded on the shell 7, and the power management unit 604 in the embodiment is mainly responsible for charging management and voltage stabilization output, and provides corresponding working voltage for the digital circuit and the sensor interface of the device, to ensure the reliability and durability of the device in daily use. In daily use, the charging interface 607 can be used for charging to ensure normal use.

[0065] As Figure 5As shown, as one specific embodiment of the present scheme, the uterine contraction monitoring patches 1 are four, connected to each other to form a cross shape, with the center of the axis bonded to the center of the bottom of the shell 7, and can be stretched and attached to the abdomen of the pregnant woman in the transverse and longitudinal directions during use, which can cover a larger monitoring range. This arrangement can enhance the stability and reliability of signal acquisition, ensuring accurate capture of the stretching changes of the abdominal skin during different stages of uterine contraction. In addition, the multi-sensor layout can also effectively reduce the errors caused by single-point measurement, improving the accuracy of the monitoring data.

[0066] The shell 7 is circular, with the center of the bottom bonded to the centers of the four interconnected uterine contraction monitoring patches 1, and a threading hole or a magnetic attraction electric contact or an electric connection sub-mother buckle is provided on the bottom of the shell for the flexible stretchable strain sensor to be connected to the internal signal processing unit 602.

[0067] When it is an electric connection sub-mother buckle structure, an electric connection sub-buckle is embedded on the surface of the center of the several interconnected uterine contraction monitoring patches 1, and a matching electric connection mother buckle is provided on the bottom of the shell 7, thereby realizing quick electric connection and facilitating disassembly and use.

[0068] In order to facilitate touch operation, the LED electronic screen 606 directly serves as the top cover of the shell 7, facilitating manual operation by the pregnant woman. The charging interface 607 is provided on the side of the shell 7, facilitating charging without interfering with the LED electronic screen 606.

[0069] The pregnant woman feels the strongest point of uterine contraction by herself, and the base adhesive layer 3 provides certain adhesion to place the uterine contraction monitoring patch 1 at the strongest position of uterine contraction on the abdomen. The pregnant woman starts uterine contraction monitoring by clicking the mobile phone application or the LED electronic screen 606, and according to the standard of clinical uterine contraction monitoring, the uterine contraction monitoring patch 1 in the present embodiment needs to monitor uterine contraction for at least 20 minutes continuously. The flexible sensing front end 5 captures the stretching changes of the skin of the pregnant woman during uterine contraction through the flexible stretchable strain sensor 4.

[0070] Specifically, the flexible stretchable strain sensor 4 is connected to the signal processing unit 602 through the liquid metal conductor printed circuit 401, the signal processing unit 602 generates uterine contraction analog electric signals for analysis by capturing the resistance changes of the sensor, and sends the uterine contraction signals after noise reduction to the mobile phone mobile terminal through the low-power Bluetooth or BLE module after being packaged into a data frame of a specified format by the data transmission unit 603. The pregnant woman can check the current uterine contraction intensity on the mobile phone application or the LED electronic screen 606.

[0071] It should be noted that, since the functional modules involved in the device, i.e. the signal processing unit 602, the acquisition module 6, the data transmission unit 603, the power management unit 604, the display unit 605, and the flexible stretch strain sensor 4 as the acquisition end, the electrical connection among them all adopts the common knowledge in the art, and the implementation of their functions, such as data acquisition, data processing, data transmission, and data display, can all be realized by using existing conventional technologies, so they are not the protection points of the present scheme. The present scheme only protects the connection relationship of the hardware structures, i.e. the functional modules, and further provides a uterine contraction monitoring patch and uterine contraction monitoring device which is simple in structure, convenient for long-time flexible pasting on the abdomen of a pregnant woman, and does not affect the comfort and tolerance of the pregnant woman.

[0072] The above description is only for illustrating the embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flexible stretch-aware based contraction monitoring patch, characterized in that, It comprises: a polyurethane elastic plastic sealing layer (2) comprising an upper polyurethane elastic plastic sealing layer (201) and a lower polyurethane elastic plastic sealing layer (202), which form a polyurethane elastic plastic sealing cavity (203) after being connected with each other; a flexible tensile strain sensor (4) arranged in the polyurethane elastic plastic sealing cavity (203) to form a flexible stretchable sensing front end (5); a substrate adhesion layer (3) comprising an upper substrate adhesion layer (301) and a lower substrate adhesion layer (302), which form a substrate adhesion plastic sealing cavity (303) after being connected with each other, for plastic sealing of the flexible stretchable sensing front end (5) to form the uterine contraction monitoring patch (1).

2. The flexible stretch-aware contraction monitoring patch of claim 1, wherein, The polyurethane elastic plastic sealing layer (2) is a functional coating or sealing layer made of polyurethane elastomer as a base material.

3. The flexible stretch-aware contraction monitoring patch of claim 1, wherein, The substrate adhesion layer (3) is a substrate adhesion layer made of organic silicone adhesive and sterile pure cotton cloth.

4. A flexible stretch-aware based uterine contraction monitoring device, characterized in that, It comprises at least one uterine contraction monitoring patch (1) as claimed in any one of claims 1-3, which is fixed to the abdomen of a pregnant woman to sense and capture the skin stretch change of the pregnant woman during uterine contraction to obtain uterine contraction signals; and further comprises: a shell (7) which can be bonded with the upper substrate adhesion layer (301) and has an installation cavity inside; a collection module (6) installed in the installation cavity, comprising a PCB board (601), a signal processing unit (602), a data transmission unit (603), a power management unit (604) and a display unit (605) connected in sequence; the PCB board (601) is also electrically connected with the flexible tensile strain sensor (4) in the uterine contraction monitoring patch (1); Specifically, the signal processing unit (602) is used for receiving the uterine contraction signals collected by the flexible tensile strain sensor (4) and performing preprocessing; the data transmission unit (603) is used for transmitting the preprocessed uterine contraction signals to a mobile phone mobile terminal; the power management unit (604) is used for providing power supply; the display unit (605) is used for displaying the content and state.

5. The flexible stretch-aware contraction monitoring device of claim 4, wherein, The signal processing unit (602) comprises a microprocessor, a sensor interface circuit, a signal amplification circuit, an analog-digital conversion circuit and a filter noise reduction circuit connected with each other.

6. The flexible stretch-aware contraction monitoring device of claim 4, wherein, The data transmission unit (603) is any one of a Wi-Fi wireless communication module, a low-power Bluetooth communication module, a 4G communication module, a 5G communication module and a Zig-Bee wireless communication module.

7. The flexible stretch-aware contraction monitoring device of claim 4, wherein, The display unit (605) comprises an LED electronic screen (606) embedded on the shell for displaying the content and state.

8. The flexible stretch-aware contraction monitoring device of claim 4, wherein, The power management unit (604) comprises a lithium battery, a power management circuit and a charging interface (607) embedded on the shell (7).

9. The flexible stretch-aware contraction monitoring device of claim 4, wherein, The uterine contraction monitoring patches (1) are four, connected to each other to form a cross shape, and the center of the cross is bonded to the center of the bottom of the shell (7).

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