TWI849788B - Membrane pressure sensing unit and cardiopulmonary resuscitation assisting device having the same - Google Patents

Abstract

The present invention discloses a thin film pressure sensing unit, which mainly includes a substrate and a sensing part, wherein the substrate has a first film and a second film similar in shape to the first film; the sensing part is arranged between the first film and the second film, and the overall thickness of the first film and the sensing part after being superimposed is between 10μm and 1000μm; wherein, when an external force is applied to the chest cavity at the position where the thin film pressure sensing unit is located, the sensing part is simultaneously subjected to the external force to measure a sensing signal. Accordingly, the thin film pressure sensing unit provided by the present invention has the characteristics of being lighter, softer and highly reliable, so as to avoid the problems of uneven force application and poor fixation as in traditional technologies.

Description

Membrane pressure sensing unit and cardiopulmonary resuscitation assisting device having the same

The present invention relates to medical treatment, and more particularly to a membrane pressure sensing unit and a cardiopulmonary resuscitation assisting device having the membrane pressure sensing unit.

According to traditional cardiopulmonary resuscitation (CPR), the location and strength of force applied are determined by the operator's experience and skills. However, this method of using empirical rules is quite difficult for beginners and non-professionals, and it is easy to be inaccurate or apply too little or too much force, thereby causing harm to the patient.

In recent years, with the continuous advancement of technology, pressure sensing devices have been introduced that can detect whether the force position and strength are correct, and send warning signals to the operator to help him adjust the force position and strength.

However, traditional pressure sensing devices are often too thick, which can lead to problems such as uneven force application, poor fixation, and low accuracy in measuring the depth of sternum sinking, making it impossible to effectively perform CPR.

Therefore, relevant industry players need to consider how to improve the thickness of traditional pressure sensing devices and develop a thinner, softer and more reliable pressure sensing device to ensure the accuracy of force location and strength, thereby improving the success rate of CPR and reducing harm to patients.

The main purpose of the present invention is to provide a thin film pressure sensing unit which is thinner, softer and highly reliable, so as to avoid the problems of uneven force application and poor fixation as in the traditional technology, thereby improving the accuracy of CPR.

Therefore, in order to achieve the above-mentioned purpose, the thin film pressure sensing unit disclosed in the present invention mainly includes a substrate and a sensing part, wherein the substrate has a first film and a second film with a shape similar to the first film; the sensing part is arranged between the first film and the second film, and the overall total thickness of the first film and the sensing part after overlapping is between 10μm and 1000μm; wherein, when an external force is applied to the chest cavity at the position where the thin film pressure sensing unit is located, the sensing part is simultaneously subjected to the action of the external force to measure a sensing signal.

In one embodiment, the sensing signal includes the force application position, force magnitude and force application range of the external force applied to the chest cavity.

In one embodiment, the sensing portion is a thin film pressure sensor, a surface acoustic wave pressure sensor, or a plasma resonance pressure sensor.

In one embodiment, the sensing portion includes a sheet-like body and a circuit pattern, wherein the area of the body is smaller than the area of the first film or the second film, and is disposed between the first film and the second film; the circuit pattern is formed on the body, and the sensing range is defined by the area where the circuit pattern is located on the body.

Furthermore, the present invention further discloses a cardiopulmonary resuscitation assisting device, which includes a database, a membrane pressure sensing unit as described above, and a processing unit, wherein the database stores at least one standard force data; the processing unit is electrically connected to the membrane pressure sensing unit and the database respectively to receive the sensing signal sensed by the membrane pressure sensing unit and compare it with the standard force data stored in the database to determine whether the force application method of the external force is correct, and obtain a judgment result; wherein, when the judgment result is correct, the judgment result is stored in the database; when the judgment result is wrong, a first warning signal is generated.

In one embodiment, the standard force application data includes a standard force application position, a standard force application magnitude, and a standard force application range.

In one embodiment, the device further includes a warning unit, which is electrically connected to the processing unit and is used to receive the first warning signal and present it in a form that can be perceived by human senses.

In one embodiment, the warning unit is a speaker, a display or a lamp.

In one embodiment, the device further includes a physiological monitoring unit, which is placed at a suitable position of the external human body to detect real-time physiological information; and the physiological monitoring unit is electrically connected to the processing unit, so that the processing unit can receive the real-time physiological information and read a standard physiological information stored in the database, and obtain a monitoring result based on the difference between the real-time physiological information and the standard physiological information; wherein, when the monitoring result is abnormal, a second alarm signal is generated; if the monitoring result is normal, the monitoring result is stored in the database.

In one embodiment, the device further includes a defibrillator unit electrically connected to the processing unit for receiving the second alarm signal to perform a defibrillator operation.

The terms “electrically connected”, “linked”, “connected”, “transmitted”, “received”, “read” or other similar terms used in the present invention refer to the transmission of signals or information by wired or wireless means, such as wires, the Internet, wireless networks, Bluetooth signals, etc.

Please refer to FIG. 1 to FIG. 4 , which are a cardiopulmonary resuscitation assist device according to a preferred embodiment of the present invention, which includes a database 10, a membrane pressure sensing unit 20, a processing unit 30, a warning unit 40, a physiological monitoring unit 50 and a defibrillator unit 60.

The database 10 is used for reading or writing data. Specifically, the database 10 is a storage medium, which can be but not limited to a traditional hard disk (HDD), a solid state drive (SSD) or a server (Database Server). The database 10 stores at least one standard force data, and the standard force data includes a standard force position, a standard force magnitude and a standard force range.

The film pressure sensing unit 20 includes a substrate 21 and a sensing portion 22, wherein the substrate 21 has a first film 211 and a second film 212 having a shape similar to the first film 211. The thickness of the films 211 and 212 is not particularly limited and can be appropriately selected according to the purpose. However, as an example, the thickness of the films 211 and 212 can be selected to be any value between 10 μm and 200 μm. Furthermore, the materials of the films 211 and 212 are made of flexible materials, such as polyvinyl chloride, polyvinylidene fluoride, polyvinylidene fluoride (PVDF), nylon, etc.

The sensing portion 22 may be, but is not limited to, a thin film pressure sensor, a surface acoustic wave pressure sensor or a plasma resonance pressure sensor. In this example, the sensing portion 22 is described by its main components, i.e., the sensing portion 22 includes a body 221 and a circuit pattern 222. The body 221 is a sheet-like structure, and its shape is designed to match the shapes of the films. It can also be arbitrarily changed according to needs, such as circular, square, rectangular, polygonal, irregular, etc. The body 221 of this example is rectangular, and its area is smaller than the area of the first film 211 or the second film 212, and is disposed between the first film 211 and the second film 212. Furthermore, the material of the body 221 is also made of a flexible material, and its thickness is between 10 μm and 200 μm. In addition, the body 221 is disposed between the first film 211 and the second film 212, and the total thickness of the first film 211 and the sensing portion 22 after being overlapped is between 10 μm and 1000 μm, in order to take both rigidity and softness into consideration and obtain a state of better flexibility.

The circuit pattern 222 is formed on the body 221, and a sensing range is defined by the area where the circuit pattern 222 is located on the body 221. For example, the circuit pattern 222 is printed on the body 221 using printed electronics technology, and common printed electronics are flexible printing, inkjet printing, fluorescent printing, screen printing, etc., and the circuit pattern 222 with conductive, insulating or sensing functions is printed on different substrates 21. The circuit pattern 222 in this example is composed of a plurality of conductive materials, and common conductive electrode materials include copper, gold, aluminum, titanium, etc., and the arrangement and size of these conductive electrodes will be designed according to specific application requirements. In other possible embodiments, the circuit pattern 222 may also have a plurality of sensing points, and the number and positions of the sensing points are appropriately set and arranged into a sensing array, wherein when external pressure is applied, the deformation of the conductive electrode will cause changes in the circuit, thereby sensing the change in pressure, and causing the sensing unit 22 to output a sensing signal.

The processing unit 30 may be, but is not limited to, a central processing unit 30 (CPU), a micro control unit (MCU), a microprocessor (Microprocessor), a digital signal processor (DSP), a programmable controller, an application specific integrated circuit (ASIC), a graphics processing unit (GPU), an arithmetic logic unit (ALU), a complex programmable logic device (CPLD), a field programmable gate array (FPGA), or other similar components with computing capabilities.

The processing unit 30 is electrically connected to the membrane pressure sensing unit 20 and the database 10 respectively to receive a sensing signal sensed by the membrane pressure sensing unit 20 and compare it with the standard force data stored in the database 10 to determine whether the force application method of the external force is correct, and obtain a judgment result; wherein, when the judgment result is correct, the judgment result is stored in the database 10; when the judgment result is wrong, a first warning signal is generated.

The warning unit 40 is electrically connected to the processing unit 30 to receive the first warning signal and present it in a form that can be perceived by human senses. For example, the warning unit 40 is a speaker, a display or a lamp, and uses sound, text, light color or flashing light to express it.

The physiological monitoring unit 50 may be, but is not limited to, a smart bracelet, a blood pressure monitor, an electrocardiogram monitor, a blood glucose meter, a respiratory monitor, or other similar or multifunctional instruments. The physiological monitoring unit 50 in this example is composed of a plurality of biosensors, such as an electrocardiogram (ECG) sensor, a photoplethysmogram (PPG) sensor, a micro-electromechanical systems (MEM) sensor, and a body temperature sensor, and can simultaneously sense physiological characteristics such as ECG, heart rate (HR), heart rate variability (HRV), respiratory rate (EDR), and body temperature (Body Temp.).

Furthermore, the physiological monitoring unit 50 is placed at a suitable position of the external human body to detect real-time physiological information; and the physiological monitoring unit 50 is electrically connected to the processing unit 30, so that the processing unit 30 can receive the real-time physiological information and read a standard physiological information stored in the database 10, and obtain a monitoring result according to the difference between the real-time physiological information and the standard physiological information; wherein, when the monitoring result is abnormal, a second alarm signal is generated and indicated by the alarm unit 40. If the monitoring result is normal, the monitoring result is stored in the database 10.

The defibrillator unit 60 is an automated external defibrillator (AED), which is a medical device used for cardiac arrest treatment. It is mainly composed of a housing, a control panel, a battery and a defibrillator. In this example, the database 10, the processing unit 30 and the warning unit 40 can be integrated into the housing, and the defibrillator unit 60 is electrically connected to the processing unit 30 to receive the second alarm signal to perform a defibrillation operation. The defibrillation operation belongs to the known technology and is not the focus of the present invention, so it will not be described in detail.

By combining the above components, the specific implementation of the cardiopulmonary resuscitation assist device disclosed in the present invention is described as follows.

First, as shown in FIG. 1 , the membrane pressure sensing unit 20, the physiological monitoring unit 50 and the defibrillator unit 60 are respectively placed at appropriate positions on the chest of an external human body.

Next, when an external force is applied to the chest cavity at the location of the film pressure sensing unit 20, the sensing portion 22 is simultaneously subjected to the external force to measure the sensing signal, and the sensing signal includes the force position, force magnitude and force range of the external force applied to the chest cavity.

Then, the processing unit 30 receives the sensing signal and compares it with the standard force data to determine whether the external force is applied in a correct manner. When the determination result is an error, the first warning signal is sent and indicated by the warning unit 40. The first warning signal at least includes the following information:

1. Apply force at the correct location, for example: instruct the operator to apply force about 2 inches (about 5 cm) below the sternum to ensure that the force is applied to the heart.

2. The correct amount of force, for example: instructing the operator to adjust the amount of force (usually at least 100 pounds or 45 kilograms) to compress the chest cavity and heart to produce sufficient blood flow.

3. Force application speed: Instruct the operator to apply force at a speed of 100 to 120 times per minute to maintain an appropriate rhythm.

4. Stopping time, for example: instructing the operator to stop applying force at the appropriate time after each CPR process to allow the heart to fully expand and allow blood to flow back to the heart.

Therefore, for beginners and non-professionals, this first warning signal is very important because it provides real-time feedback and guidance to help the operator perform the correct CPR steps to improve the success rate and survival rate of CPR.

In addition, the cardiopulmonary resuscitation assist device of the present invention can be further applied to the following situations:

1. Hospitals and emergency departments: CPR devices can be used in emergency medical situations, such as cardiac arrest, suffocation, respiratory failure, etc., to improve the patient's survival rate and recovery rate.

2. Nursing institutions for elderly people living independently: Cardiopulmonary resuscitation assist devices can be used to deal with sudden emergencies for the elderly, help them restore their breathing and heartbeat, and improve their survival rate.

3. Schools and sports fields: CPR assist devices can be used to deal with emergencies that occur to athletes or students during sports, improving their survival and recovery rates.

4. Community: CPR devices can be placed in public places such as shopping malls, parks, subway stations, etc. to deal with emergencies and improve the survival and recovery rates of the public.

5. Rescue teams and ambulances: CPR assist devices can be used in on-site rescue and ambulances to improve the efficiency of rescue teams in handling emergencies and the survival rate of patients.

In summary, the cardiopulmonary resuscitation assist device of the present invention can be applied to various emergency medical situations to improve the survival rate and recovery rate of patients, and plays an important role in various occasions.

10: Database 20: Thin film pressure sensing unit 21: Substrate 211: First thin film 212: Second thin film 22: Sensing unit 221: Main body 222: Circuit diagram 30: Processing unit 40: Alarm unit 50: Physiological monitoring unit 60: De-shivering unit

FIG. 1 is a schematic diagram of the cardiopulmonary resuscitation assist device of the present invention. FIG. 2 is a system block diagram of the cardiopulmonary resuscitation assist device of the present invention. FIG. 3 is a schematic diagram of the membrane pressure sensing unit of the present invention. FIG. 4 is an exploded view of the membrane pressure sensing unit of the present invention.

20: Thin film pressure sensing unit

50: Physiological monitoring unit

60: Defibrillator unit

Claims (10)

A thin film pressure sensing unit is used to be placed on the chest of an external human body, and the thin film pressure sensing unit includes: A substrate having a first film and a second film similar in shape to the first film; A sensing part is arranged between the first film and the second film, and the total thickness of the first film and the sensing part after being superimposed is between 10μm and 1000μm; wherein, when an external force is applied to the chest cavity at the position where the thin film pressure sensing unit is located, the sensing part is simultaneously subjected to the external force to measure a sensing signal. A thin film pressure sensing unit as described in claim 1, wherein the sensing signal includes the force position, force magnitude and force range of the external force applied to the chest cavity. A thin film pressure sensing unit as described in claim 1, wherein the sensing portion is a thin film pressure sensor, a surface acoustic wave pressure sensor or a plasma resonance pressure sensor. The thin film pressure sensing unit as described in claim 1, wherein the sensing portion comprises: A sheet-shaped body, whose area is smaller than the area of the first film or the second film and is disposed between the first film and the second film; A circuit pattern is formed on the body, and the sensing range is defined by the area where the circuit pattern is located on the body. A cardiopulmonary resuscitation assisting device, comprising: A database storing at least one standard force data; A membrane pressure sensing unit as described in any one of claim items 1 to 4; A processing unit, electrically connected to the membrane pressure sensing unit and the database, respectively, to receive the sensing signal sensed by the membrane pressure sensing unit and compare it with the standard force data stored in the database to determine whether the force application method of the external force is correct, and obtain a judgment result; wherein, when the judgment result is correct, the judgment result is stored in the database; when the judgment result is wrong, a first warning signal is generated. A cardiopulmonary resuscitation assist device as described in claim 5, wherein the standard force data includes a standard force position, a standard force magnitude, and a standard force range. The cardiopulmonary resuscitation assist device as described in claim 5 further includes an alarm unit electrically connected to the processing unit for receiving the first alarm signal and presenting it in a form perceptible to human senses. A cardiopulmonary resuscitation assist device as described in claim 7, wherein the warning unit is a speaker, a display or a lamp. The cardiopulmonary resuscitation assist device as described in claim 5 further includes a physiological monitoring unit, which is placed at a suitable position of the external human body to detect real-time physiological information; and the physiological monitoring unit is electrically connected to the processing unit, so that the processing unit can receive the real-time physiological information and read a standard physiological information stored in the database, and obtain a monitoring result based on the difference between the real-time physiological information and the standard physiological information; wherein, when the monitoring result is abnormal, a second alarm signal is generated; if the monitoring result is normal, the monitoring result is stored in the database. The cardiopulmonary resuscitation assist device as described in claim 9 further includes a defibrillator unit electrically connected to the processing unit for receiving the second alarm signal to perform a defibrillator operation.

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