Non-invasive measurement method and device for measuring intestinal core temperature via navel

Abstract

A non-invasive measurement method and device for measuring intestinal core temperature through the navel. The device is located on the navel surface of the human abdomen and is used to detect the intestinal core temperature of the human body. It includes a heat-conducting lower cover and a heat-insulating upper shell. A circuit board is arranged inside the heat-conducting lower cover and the heat-insulating upper shell. The circuit board is provided with an infrared temperature sensor, an ambient temperature sensor, an IC chip, a data transmission chip and a power supply. A measuring hole is arranged on the heat-conducting lower cover at a position corresponding to the infrared temperature sensor. The core temperature value close to the navel intestinal tract is calculated by the value detected by the sensor in the device, and the temperature information is uploaded to the host computer for display and storage through the communication module. The present invention realizes convenient, fast, non-invasive, real-time and accurate measurement of the core temperature closest to the human intestinal tract, and effectively solves the defect that the existing non-invasive temperature measurement technology cannot measure the core temperature of the human intestinal tract quickly, accurately, continuously, in real time and for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of human medical core body temperature monitoring equipment, and in particular to a non-invasive measurement method and equipment for measuring intestinal core temperature through the navel. Background Art

[0002] Human core temperature is an important medical vital sign. In many cases such as fever and postoperative recovery, body temperature changes with the recovery of the body. It is often necessary to measure the human core temperature in real time for a long time during this period. The human core temperature measured by medical treatment refers to the temperature of the chest, abdomen and central nervous system inside the body. Since the human core temperature is not easy to test, the relative temperature of the eardrum, forehead, mouth, armpit, rectum and other places is often used to represent the body temperature in clinical practice. The actual core temperature differs from the temperature measured at these locations by 0.4-1 degree. The rectal temperature is closest to the human core temperature. At present, the medical system measures and finds out whether the patient's body temperature is within the normal range by a timed single measurement. This single measurement method is extremely inefficient and has a huge workload. If the human core temperature deviates from the normal range by 1 degree Celsius, it may endanger life if it is not discovered and treated in time. Therefore, it is very important to measure the changes in human core temperature continuously, in real time, accurately and quickly.

[0003] However, the current method of measuring human core temperature is to insert a catheter with a temperature sensor into the human blood vessels or rectum to obtain the human core temperature. These methods may cause side effects, infection, blood vessel coagulation and other consequences, which are extremely painful and uncomfortable for patients. In addition, temperature measurement inserted into human blood vessels or rectum is not suitable for long-term real-time detection.

[0004] Or the core temperature can be estimated by measuring the surface temperature of the body. This is done by touching the forehead with your hand or a thermocouple, thermistor, electronic temperature sensor, or infrared temperature measuring instrument. The core temperature can be estimated, but due to the temperature drop inside and outside the human skin and other intermediate tissues, there is a certain error between the temperature collected by these sensors and the core temperature. This temperature error is not constant, but changes significantly depending on individual differences, sweating, room temperature, measurement site, fat thickness and other factors. In addition, forehead temperature measurement is not convenient to fix and wear, and is not suitable for long-term real-time detection.

[0005] Core temperature can also be estimated by using an oral thermometer. The temperature measured by placing the thermometer under the tongue is about 0.2-0.5 degrees Celsius different from the core temperature. However, even oral temperature has small errors, such as breathing, eating or other cavity activities. Measuring core temperature through the mouth is not suitable for long-term real-time monitoring.

[0006] There are also infrared thermometers that are inserted into the ear canal. The eardrum is relatively close to the brain and reflects the core body temperature relatively accurately, but the shape of each person's ear canal is different, and the curvature of the ear canal and factors such as earwax in the ear canal may hinder access to the eardrum, resulting in increased errors in measuring temperature. The contact between the thermometer and the eardrum can easily cause ear infections, which is a serious medical condition. Measuring core temperature through the eardrum is also not suitable for long-term real-time monitoring.

[0007] Another method is to place a temperature sensor under the armpit and tighten the armpit to form a closed environment to prevent heat loss, thereby estimating the core temperature. Usually, the armpit temperature is 0.2-0.8 degrees Celsius lower than the core temperature. However, there is also a small error in the armpit temperature, especially when the armpit is moving, standing up, or taking things, and the armpit is not allowed to remain in a closed environment, which causes the temperature measurement error to increase sharply. Measuring core temperature through the armpit is not suitable for long-term real-time monitoring.

[0008] Another method is to fix a temperature sensor on the abdomen to obtain the temperature of the abdomen close to the intestines, thereby estimating the core temperature of the human body. However, due to individual differences, the error becomes larger. For example, the fat tissue in the abdomen of infants is relatively thin, and the skin is close to the internal intestines, so the measured temperature can more accurately reflect the core temperature of the body. As people grow, the abdominal tissue and fat become thicker, and the temperature inside the tissue drops, causing the temperature measured by this method to have an increasing error from the core temperature, and cannot accurately reflect the core temperature of people of different ages and different fatness. Summary of the invention

[0009] The present invention aims to solve the problems of the prior art and provide a non-invasive measurement method and device for measuring intestinal core temperature through the navel, which can realize continuous measurement of the intestinal core temperature of people of different age groups and different populations, and can be worn, non-invasive, long-term, continuous, real-time, fast and accurate.

[0010] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0011] The non-invasive measurement device for measuring the intestinal core temperature through the navel is located on the surface of the navel on the abdomen of the human body and is used to detect the intestinal core temperature of the human body. It includes a heat-conducting lower cover and a heat-insulating upper shell. A circuit board is arranged inside the heat-conducting lower cover and the heat-insulating upper shell. The circuit board is provided with an infrared temperature sensor, an ambient temperature sensor, an IC chip, a data transmission chip and a power supply. A measuring hole is arranged on the heat-conducting lower cover at a position corresponding to the infrared temperature sensor. The heat-conducting lower cover is close to the navel skin surface close to the intestinal core temperature, and is used to quickly conduct the skin surface temperature of the human navel area to the inside of the device and maintain a stable temperature state, thereby improving the accuracy of the infrared sensor in measuring the navel skin surface temperature. It has high thermal conductivity and is made of elastic material with a certain softness. It can be made of medical composite silicone by adding a certain proportion of high thermal conductivity aluminum nitride material composite process. The thermal insulation upper shell plays a role in thermal insulation. It is made of medical composite silicone material through a composite process of adding a certain proportion of thermal insulation material. It has a low heat transfer rate and heat storage performance. It can keep the temperature conducted from the heat-conductive lower cover to the infrared sensor in a stable state for a certain period of time, thereby improving the accuracy of the infrared sensor measuring the navel skin surface temperature and the ambient temperature sensor measuring the ambient temperature around the infrared temperature sensor.

[0012] Preferably, the infrared temperature sensor protrudes from the circuit board, and a protrusion is provided at the measuring hole position on the heat-conducting lower cover. The protrusion allows the infrared temperature sensor to be closer to the skin on the surface of the navel, so that the temperature can be measured more accurately.

[0013] Preferably, the device is provided with an isolation sleeve on the side facing the abdomen. The isolation sleeve is provided with a protrusion corresponding to the measuring hole position on the heat-conducting lower cover, wrapping the side facing the human body, and is used to isolate human skin secretions (such as sweat, bacteria) from direct contact with the device, which can effectively isolate the device from contact with human bacteria to prevent secondary infection. The material is made of polyethylene PP material, with a minimum thickness of less than 0.01 mm, which can effectively transmit infrared rays and can be replaced with a new one after one use.

[0014] Preferably, the device is provided with a double-sided tape on the side facing the abdomen, which is used to fit and fix the device to the surface of human skin. It uses a thinner double-sided material with a fitting effect, including but not limited to medical non-woven double-sided tape, PP medical double-sided tape, hydrogel double-sided tape, etc.

[0015] Preferably, the device is provided with a single-sided patch on the outward side, which fits the abdominal skin area around the navel and completely covers the measuring device. A thinner single-sided material with a fitting effect is used, including but not limited to medical non-woven fabric single-sided patches, PP medical single-sided patches, hydrogel single-sided patches, etc.

[0016] Preferably, the infrared temperature sensor is covered with a cover ring. The cover ring is used to quickly conduct heat flow and shield environmental radiation interference, so that the infrared temperature sensor can quickly adjust the environmental temperature through heat flow conduction and keep its own temperature stable. It can be an annular cover made of copper with high thermal conductivity, which is put on the infrared temperature sensor and hollowed out in the middle to allow infrared rays of the object to be measured to pass normally.

[0017] Preferably, a wireless charger is provided, and a device placement slot for accommodating the device and a charging port are provided on the wireless charger. The shape of the measuring device is a flat shape with a convex surface, and the outline can be circular, track-shaped, oval, etc. The outline of the device placement slot of the wireless charger is slightly larger than the measuring device, and the measuring device can be placed therein relatively loosely.

[0018] A non-invasive method for measuring intestinal core temperature through the navel, the method comprising the following steps:

[0019] S1. Fix the device at the navel of the human abdomen;

[0020] S2, the device is turned on and enters the initialization state;

[0021] S3, collecting data, the infrared temperature sensor and the ambient temperature sensor respectively collect temperature data of the skin surface at the navel and the ambient temperature data of the infrared temperature sensor in the measuring device;

[0022] S4. Calculate the core temperature value of the intestine near the navel using the following formula:

[0023] T c =T a +K a V

[0024] Where: T c is the intestinal core temperature, T a is the ambient temperature inside the device, V is the detection value of the infrared temperature sensor, K a is the ambient temperature compensation coefficient;

[0025] S5, transmitting the data to the host computer for storage and display;

[0026] S6. Determine whether the temperature measurement is completed. If the temperature measurement is completed, enter the standby state.

[0027] Preferably, in step S2, the device automatically determines whether it is connected to the host computer: if it is determined to be connected to the host computer, it starts to enter step S3; if it is determined not to be connected to the host computer, it ends the temperature measurement and enters the standby state.

[0028] Preferably, the ambient temperature compensation coefficient K a It is calculated in the process of first calibrating S, and its calculation formula is:

[0029]

[0030] Where: L is the distance between the skin surface and the infrared temperature sensor, S is the emissivity of the navel skin surface, T a is the ambient temperature inside the device.

[0031] Preferably, in steps S3 and S4, effective data collection is performed after the machine is turned on for a period of time, and multiple sets of data are continuously collected within a certain period of time, multiple core temperature values ​​are calculated, and the intestinal core temperature value closest to the actual value is obtained by the least squares method and used as the displayed temperature reading.

[0032] The beneficial effects of the present invention are: 1. The core body temperature can be monitored and measured in real time, continuously, accurately and non-invasively to effectively and timely describe the patient's condition. It is suitable for children's temperature monitoring, medical diagnosis, vital signs monitoring, ICU critical care, basal body temperature continuous measurement monitoring and rehabilitation monitoring medical core body temperature monitoring and other related applications.

[0033] 2. It can be worn for a long time to monitor the changes in the core temperature of the human intestine, truly reflecting the changes in the core temperature of the human body more accurately and stably than other parts.

[0034] 3. The wearable sticking method provides a more convenient and comfortable way to measure the core temperature of the human body. The navel wearing measurement method can make the user feel more comfortable, and it is easy to use and does not require the cooperation of other people.

[0035] 4. Continuous measurement of intestinal core temperature can be achieved without causing invasive trauma to the human body.

[0036] 5. The core temperature of the human intestine can be measured for people of different ages and different weights.

[0037] 6. A measurement method close to the intestinal core temperature is provided by measuring the skin surface of the navel close to the intestinal core temperature or the skin surface of the abdominal measurement area near the surface, and a method for calibrating the intestinal core temperature at the navel skin surface by setting an ambient temperature compensation coefficient is provided, so that the measurement is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a local anatomical diagram of the front of the human abdomen;

[0039] Figure 2 is a front view of the measuring device and the human body in the present invention;

[0040] Figure 3 is a cross-sectional view of the measuring device and the side of the human body in the present invention;

[0041] Figure 4 is an enlarged cross-sectional view of the measuring device and the human body in the present invention;

[0042] Figure 5 is a side view of the measuring device of the present invention;

[0043] Figure 6 is a three-dimensional diagram of the measuring device of the present invention;

[0044] Figure 7 is an exploded view of the measuring device of the present invention;

[0045] Figure 8 is a partial stereogram of the measuring device of the present invention;

[0046] Fig. 9 is a three-dimensional diagram of the internal structure of the measuring device of the present invention;

[0047] Fig.10 is another stereoscopic view of the internal structure of the measuring device of the present invention;

[0048] Fig.11 is a front view of the internal structure of the measuring device of the present invention;

[0049] Fig.12 is a three-dimensional diagram of the measuring device and the wireless charger in the present invention;

[0050] Fig.13 It is a schematic flow chart of the measuring method in the present invention;

[0051] Fig.14 It is a flow chart of the communication architecture of the measurement method in the present invention;

[0052] Fig.15 It is a diagram (part) showing the calibration coefficients at different ambient temperatures;

[0053] Fig.16 It is a schematic diagram of improving accuracy through the least square method of the present invention.

[0054] Serial numbers in the figure: 1. thermal conductive lower cover, 1.1. measuring hole, 1.2. protrusion, 2. thermal insulation upper shell, 3. circuit board, 4. infrared temperature sensor, 5. ambient temperature sensor, 6. IC chip, 7. data transmission chip, 8. power supply, 9. isolation sleeve, 10. double-sided sticker, 11. single-sided sticker, 12. cover ring, 13. wireless charger, 13.1. device placement slot, 13.2. charging port, 100. device, 200. abdomen, 300. navel, 400. intestine, 500. skin fat tissue layer, 600. Internet of Things data receiving terminal, 700. intelligent data receiving terminal, 800. cloud server. DETAILED DESCRIPTION

[0055] The present invention will be further described below through specific implementation modes and accompanying drawings.

[0056] The implementation method is: Figure 1 As shown, a partial anatomy diagram of the front of the human body is shown, showing the abdomen 200, the navel 300, the intestine 400 and the skin fat tissue layer 500, combined with Figure 2-3 As shown, a wearing position diagram of the device 100 is shown, which is located on the surface of the navel 300 of the human abdomen 200 and is used to detect the core temperature of the human intestine 400.

[0057] Combination Figure 4-11 As shown, a non-invasive measuring device for measuring intestinal core temperature through the navel, the device 100 includes a heat-conducting lower cover 1 and a heat-insulating upper shell 2, a circuit board 3 is arranged inside the heat-conducting lower cover 1 and the heat-insulating upper shell 2, an infrared temperature sensor 4, an ambient temperature sensor 5, an IC chip 6, a data transmission chip 7 and a power supply 8 are arranged on the circuit board 3, a measuring hole 1.1 is arranged on the heat-conducting lower cover 1 at a position corresponding to the infrared temperature sensor 4, a cover ring 12 is arranged on the outer cover of the infrared temperature sensor 4, the cover ring 12 is a truncated cone structure, and a through hole for accommodating the infrared temperature sensor 4 is arranged in the middle. Among them, the device 100 is provided with an isolation sleeve 9 on the side facing the abdomen 200, the infrared temperature sensor 4 protrudes from the circuit board 3, a protrusion 1.2 is arranged at the position of the measuring hole 1.1 on the heat-conducting lower cover 1, and a protrusion structure is also arranged at the corresponding position on the isolation sleeve 9. The device 100 is fixed by a double-sided sticker 10 on the side facing the abdomen 200 or a single-sided sticker 11 on the side facing the outside, or a combination of the two, wherein an opening is arranged in the middle of the single-sided sticker 11 corresponding to the position of the infrared temperature sensor 4.

[0058] The IC chip 6 calculates the data measured by the infrared temperature sensor 4 and the ambient temperature sensor 5 to obtain the intestinal core temperature value T c The data transmission chip 7 uses a wireless transceiver chip, such as a Bluetooth transceiver chip, an RFID transceiver chip, etc., to transmit the read value to the host computer by wireless means for display and storage. The power supply 8 is used to provide power and charge and discharge management to the device 100. Charging can be done by contact charging or wireless charging, etc. Fig.12 As shown, there is a matching wireless charger 13, and the wireless charger 13 is provided with a device placement slot 13.1 for accommodating the device 100 and a charging port 13.2.

[0059] Combination Fig.13 As shown, a non-invasive method for measuring intestinal core temperature by navel, the measuring method comprises the following steps:

[0060] S1, fixing the device 100 at the navel 300 of the human abdomen 200;

[0061] S2, the device 100 is turned on and enters the initialization state;

[0062] S3, collecting data, the infrared temperature sensor 4 and the ambient temperature sensor 5 respectively collect data of the skin surface at the navel 300 and the surrounding environment of the infrared temperature sensor 4 in the measuring device 100;

[0063] S4. Calculate the core temperature value of the intestine near the navel. The calculation formula is:

[0064] T c =T a +K a V

[0065] Where: T c is the intestinal core temperature, T a is the ambient temperature inside the device, V is the detection value of the infrared temperature sensor, K a is the ambient temperature compensation coefficient;

[0066] S5, transmitting the data to the host computer for storage and display;

[0067] S6. Determine whether the temperature measurement is completed. If the temperature measurement is completed, enter the standby state.

[0068] In step S1, the double-sided sticker 10 or the single-sided sticker 11, or a combination of the two, can be used to stick the device 100 at the position of the navel 300 to prevent it from falling off, and the measuring hole 1.1 and the protrusion 1.2 of the heat-conducting lower cover 1 are aligned with the navel 300. The advantage of using the infrared temperature sensor 4 to measure the navel skin surface temperature data close to the intestinal core temperature is that the different thicknesses of abdominal fat and muscle tissue of different individuals cause different temperature reductions when the intestinal core temperature is transmitted to the temperature of the abdominal skin surface close to the intestinal temperature, and the human navel skin surface temperature is closest to the human intestinal core temperature, and there is no fat or other human tissue to block the temperature from being transmitted to the navel skin surface, so the measurement is both accurate and adaptable to different individuals.

[0069] In step S2, the device 100 automatically determines whether it is connected to the host computer: if it is determined to be connected to the host computer, it starts to enter step S3; if it is determined not to be connected to the host computer, it ends the temperature measurement and enters the standby state.

[0070] In step S4, the ambient temperature compensation coefficient K a It is calculated in the process of first calibrating S, and its calculation formula 2 is:

[0071]

[0072] Where: L is the distance between the skin surface and the infrared temperature sensor, S is the emissivity of the navel skin surface, T a is the ambient temperature inside the device. Fig.14As shown, the device needs to be tested with infrared temperature sensor and ambient temperature compensation coefficient K before actually measuring for the user. a The infrared temperature sensor is calibrated by a black body device. After the infrared temperature sensor is calibrated, the device is worn on the human body. The ambient temperature is within a certain range (such as 34℃-41℃) and at a certain temperature interval (such as 0.1℃, 0.2℃ or 0.5℃, etc.). The corresponding ambient temperature compensation coefficient K is calibrated one by one. a And the infrared temperature sensor detection value V. In the final measurement, according to the measured ambient temperature T inside the device a , the detection value V of the infrared temperature sensor, find the corresponding calibrated compensation coefficient K a , calculate the human intestinal core temperature T c ,For example Fig.15 The measured ambient temperature T inside the device is a The value is 35, and the detection value V of the infrared temperature sensor is 0.149, then the corresponding compensation coefficient K a The value is 14.470, the core temperature of the human intestine T c The value of is calculated by formula 1 to be 37.2. This method can ensure that at an effective human body temperature of 35℃-42℃, the human intestinal core temperature T can still be accurately measured at different ambient temperatures in the range of 30℃-42℃. c .

[0073] Combination Fig.14 As shown, in step S5, the data of the device is transmitted to the host computer through the data transmission chip 7. The host computer can be an Internet of Things data receiving terminal 600 or an intelligent data receiving terminal 700, or a combination of the two, and is finally transmitted to the cloud server 800.

[0074] In steps S3 and S4, effective data collection is performed after a period of time after the machine is turned on (i.e., no data is collected for a period of time at the beginning), and multiple sets of data are continuously collected within a certain period of time, multiple core temperature values ​​are calculated, and the intestinal core temperature value closest to the actual value is obtained by the least squares method, and is used as the displayed temperature reading. Fig.16 shown.

[0075] In addition, the device of the present invention can also add sensors for other human vital signs parameters, such as non-invasive blood oxygen sensors, non-invasive heart rate sensors, non-invasive blood pressure sensors, non-invasive blood glucose sensors, etc. Through the collection of corresponding sensors, the core body temperature and optional other data, such as blood oxygen, heart rate, blood pressure, blood glucose and other numerical information, will be uploaded to the host computer through the data transmission chip.

[0076] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. The present invention can be used on similar products. Any changes or modifications made by any technician in the field of the present invention are covered by the patent scope of the present invention.

Claims

1. A non-invasive measurement method for measuring intestinal core temperature using a navel, a non-invasive measurement device for measuring intestinal core temperature using a navel, the device (100) being located on the surface of a navel (300) of a human abdomen (200) and used to detect the intestinal core temperature of a human body (400), characterized in that: The device (100) comprises a heat-conducting lower cover (1) and a heat-insulating upper shell (2), wherein a circuit board (3) is arranged inside the heat-conducting lower cover (1) and the heat-insulating upper shell (2), and an infrared temperature sensor (4), an ambient temperature sensor (5), an IC chip (6), a data transmission chip (7) and a power supply (8) are arranged on the circuit board (3), and a measuring hole (1.1) is arranged on the heat-conducting lower cover (1) at a position corresponding to the infrared temperature sensor (4); The measuring method comprises the following steps: S1, fixing the device (100) at the navel (300) of the abdomen (200) of the human body; S2, the device (100) is turned on and enters the initialization state; S3, collecting data, the infrared temperature sensor (4) and the ambient temperature sensor (5) respectively collect data on the skin surface at the navel (300) and the ambient environment of the infrared temperature sensor (4) in the measuring device (100); S4. Calculate the core temperature value of the intestine near the navel using the following formula: Tc=Ta+KaV Where: Tc is the intestinal core temperature, Ta is the ambient temperature inside the device, V is the detection value of the infrared temperature sensor, and Ka is the ambient temperature compensation coefficient; The ambient temperature compensation coefficient Ka is calculated in the process of calibrating S first, and its calculation formula is: Where: L is the distance between the skin surface and the infrared temperature sensor (4), S is the emissivity of the skin surface of the navel (300), and Ta is the ambient temperature inside the device; S5, transmitting the data to the host computer for storage and display; S6. Determine whether the temperature measurement is completed. If the temperature measurement is completed, enter the standby state.

2. The non-invasive method for measuring intestinal core temperature through the navel according to claim 1, characterized in that: The infrared temperature sensor (4) protrudes from the circuit board (3), and a protrusion (1.2) is provided at the position of the measuring hole (1.1) on the heat-conducting lower cover (1).

3. The non-invasive method for measuring intestinal core temperature through the navel according to claim 1 is characterized in that: The device (100) is provided with an isolation sleeve (9) on the side facing the abdomen (200).

4. The non-invasive method for measuring intestinal core temperature through the navel according to claim 1 or 3, characterized in that: The device (100) is provided with a double-sided sticker (10) on the side facing the abdomen (200), or / and the device (100) is provided with a single-sided sticker (11) on the side facing outward.

5. The non-invasive method for measuring intestinal core temperature through the navel according to claim 1, characterized in that: A wireless charger (13) is also provided, and the wireless charger (13) is provided with a device placement slot (13.1) for accommodating the device (100) and a charging port (13.2).

6. The non-invasive method for measuring intestinal core temperature through the navel according to claim 1, characterized in that: The infrared temperature sensor (4) is covered with a cover ring (12).

7. The non-invasive method for measuring intestinal core temperature through the navel according to claim 1, characterized in that: In step S2, the device (100) automatically determines whether it is connected to a host computer: if it is determined to be connected to a host computer, it proceeds to step S3; if it is determined not to be connected to a host computer, it ends the temperature measurement and enters a standby state.

8. The non-invasive method for measuring intestinal core temperature through the navel according to claim 1, characterized in that: In steps S3 and S4, effective data collection is performed after the machine is turned on for a period of time, and multiple sets of data are continuously collected within a certain period of time, multiple core temperature values ​​are calculated, and the intestinal core temperature value closest to the actual value is obtained through the least squares method, and is used as the displayed temperature reading.

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