Portable household neonatal jaundice measuring device

Abstract

The invention belongs to the technical field of jaundice determination, and discloses a portable household neonatal jaundice determination device which comprises a holding handle part, an outer shell is fixedly installed at one end of the holding handle part, a detection groove is formed in the bottom of the outer shell, and a control circuit unit, a light source module and a photodiode are arranged in the detection groove. According to the neonatal detection device, blue light LEDs, green light LEDs, photodiodes and the like are arranged, when the neonatal detection device is used, parents move the outer shell to the forehead of a neonatal and then press the outer shell downwards to make contact with the skin, the blue light LEDs and the green light LEDs which are alternately installed are used for emitting light of different wavelengths, and the detection effect is good. According to the bilirubin concentration measuring device, the photoelectric diode is used for receiving, then the control circuit unit and the microcontroller are used for calculation, interference of factors such as hemoglobin and skin thickness can be eliminated by comparing the ratio of the intensity of reflected light with two wavelengths, and the bilirubin concentration can be accurately measured.

Description

Technical Field

[0001] This invention belongs to the field of jaundice measurement technology, specifically relating to a portable home-use neonatal jaundice measurement device. Background Technology

[0002] Neonatal jaundice is a common physiological phenomenon, but in order to avoid neurological damage such as kernicterus caused by excessively high bilirubin levels, it is often necessary to perform jaundice testing on newborns early on in order to provide the necessary treatment later.

[0003] Traditional jaundice testing requires collecting newborn blood and performing serum bilirubin testing. This method is not only painful for newborns but also carries a high risk of infection and is inconvenient for practical testing. Furthermore, if the newborn's jaundice persists for a long time or the degree of jaundice does not change significantly, multiple tests may be necessary to help medical staff determine whether further treatment is needed. However, existing medical transcutaneous jaundice meters are large and expensive, making them inconvenient for parents to use for daily testing. In addition, some jaundice testing methods using LED light sources cannot adjust the wavelength of the light according to the different skin conditions of newborns. Factors such as skin surface temperature, external light intensity, skin thickness, and blood vessel distribution can all affect the final test results, making them inconvenient for practical use. Summary of the Invention

[0004] The purpose of this invention is to provide a portable home-use neonatal jaundice testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A portable home-use neonatal jaundice testing device includes a handle portion, one end of which is fixedly mounted with a housing. A detection groove is formed at the bottom of the housing. A control circuit unit, a light source module, and a photodiode are disposed inside the detection groove. The control circuit unit is fixedly mounted on the top of the inner wall of the detection groove. The light source module and the photodiode are both fixedly mounted on the control circuit unit. The control circuit unit is used to control the light source module to emit a light beam of a specific wavelength to irradiate the skin surface. The photodiode receives the light signal reflected by the skin and converts it into an electrical signal, which is then transmitted to the control circuit unit.

[0006] Preferably, the light source module includes an adjustable LED light source array, which includes blue LEDs and green LEDs. The blue LEDs are installed in a ring at equal intervals on the control circuit unit, and the emission wavelength of the blue LEDs is 450-470nm. The green LEDs are fixedly installed at equal intervals between the blue LEDs, and the emission wavelength of the green LEDs is 520-540nm. The photodiode is fixedly installed in the center of the control circuit unit and located between the blue LEDs and the green LEDs. The photodiode has a wide spectral response characteristic and is used to detect reflected light in the wavelength range of 400-700nm.

[0007] Preferably, the control circuit unit includes a microcontroller, an analog-to-digital converter, and a data processing algorithm module. The microcontroller is fixedly installed in the center of the control circuit unit and controls the light emission timing of the LED light source array. The analog-to-digital converter converts the analog signal of the photodiode into a digital signal. The data processing algorithm module calculates the bilirubin concentration value based on the dual-wavelength ratio method.

[0008] Preferably, the inner wall of the detection groove is symmetrically provided with assembly grooves on both sides. An ambient light sensor and a temperature sensor are fixedly installed inside the assembly grooves, respectively. The temperature sensor is used to detect the skin surface temperature, and the ambient light sensor is used to detect the ambient light intensity. The control circuit unit corrects the bilirubin concentration value and the luminous intensity of the LED light source based on the temperature data and light data. The data processing algorithm module adopts a dual-wavelength ratio algorithm, specifically:

[0009] Calculate the ratio of blue light reflection intensity to green light reflection intensity, R = I_blue / I_green;

[0010] The bilirubin concentration is calculated according to the preset calibration curve equation: TSB=a×ln(R)+b, where TSB is the transcutaneous bilirubin concentration, and a and b are calibration coefficients.

[0011] Preferably, the grip handle has an internal mounting slot, in which a battery, a wireless communication module, and a storage module are fixedly installed. The battery, the wireless communication module, and the storage module are all connected to the control circuit unit. An operation button is provided on the top surface of the grip handle, and a display screen is provided between the operation button and the outer shell. A charging interface is provided on the end face of the grip handle away from the outer shell.

[0012] Preferably, the wireless communication module supports Bluetooth and WiFi connections, and can transmit the detection data to a smartphone APP or cloud server. The storage module can store at least one detection record, including data such as detection time, bilirubin value, and newborn information.

[0013] Preferably, the outer casing is surrounded by a detection contact surface, which is cylindrical in shape. A light source emission hole is provided at the center of the bottom of the detection contact surface. Light receiving holes are symmetrically provided at equal intervals around the light source emission hole. Detection through holes are symmetrically provided on both sides of the light receiving holes. The light source emission hole is aligned with the photodiode, the light receiving hole is aligned with the blue LED and the green LED, and the detection through holes are aligned with the ambient light sensor and the temperature sensor. The detection contact surface is made of medical-grade silicone material, which is soft and antibacterial.

[0014] Preferably, the outer wall of the outer shell is provided with slots at equal intervals, the inner wall of the detection contact surface is provided with elastic strips at equal intervals, the elastic strips are fitted inside the slots, and the bottom of the detection contact surface is provided with rubber strips at equal intervals, and the outer wall of the grip handle is provided with anti-slip grooves.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) This invention is equipped with blue LEDs, green LEDs and photodiodes. When in use, the parent holds the handle and moves the outer shell to the newborn’s forehead, chest, abdomen and other parts. Then, the parent presses down on the outer shell to make contact with the skin. The blue LEDs and green LEDs installed alternately emit light of different wavelengths. Blue light is mainly reflected in the epidermal layer and is significantly affected by bilirubin. Green light penetrates deeper and mainly reflects the hemoglobin content. It is received by the photodiode and then calculated by the control circuit unit and microcontroller. By comparing the ratio of the intensity of the reflected light of the two wavelengths, the interference of factors such as hemoglobin and skin thickness can be eliminated and the bilirubin concentration can be accurately measured.

[0017] (2) The present invention is equipped with a temperature sensor, an ambient light sensor and a control circuit unit, etc. When in use, since the temperature sensor and the ambient light sensor are also installed inside the outer shell, when the mobile device is detected, the ambient light intensity is detected in real time through the temperature sensor and the ambient light sensor. After being fixed, the skin temperature of the newborn is detected at close range, and the bilirubin concentration is calculated according to the preset calibration curve equation: TSB=a×ln(R)+b, where TSB is the transcutaneous bilirubin concentration, and a and b are the calibration coefficients of temperature and light intensity, and the final measured detection data is corrected. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is an external view of the present invention;

[0020] Figure 3 This is a bottom view of the present invention;

[0021] Figure 4 This is a cross-sectional view of the present invention;

[0022] Figure 5 This is an external view of the contact surface detected by the present invention;

[0023] Figure 6 for Figure 1 Enlarged view of point A in the image.

[0024] In the diagram: 1. Card slot; 2. Blue LED; 3. Temperature sensor; 4. Microcontroller; 5. Photodiode; 6. Control circuit unit; 7. Wireless communication module; 8. Handle grip; 9. Battery; 10. Charging interface; 11. Mounting slot; 12. Storage module; 13. Detection contact surface; 14. Green LED; 15. Assembly slot; 16. Ambient light sensor; 17. Housing; 18. Elastic strip; 19. Rubber strip; 20. Anti-slip groove; 21. Display screen; 22. Operation buttons; 23. Detection perforation; 24. Light source emission hole; 25. Light receiving hole; 26. Detection slot. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-4As shown, the present invention provides the following technical solution: A portable home-use neonatal jaundice testing device includes a handle 8, one end of which is fixedly mounted with a housing 17. A detection groove 26 is formed at the bottom of the housing 17. Inside the detection groove 26 are a control circuit unit 6, a light source module, and a photodiode 5. The control circuit unit 6 is fixedly mounted on the top of the inner wall of the detection groove 26. The light source module and the photodiode 5 are both fixedly mounted on the control circuit unit 6. The control circuit unit 6 controls the light source module to emit a light beam of a specific wavelength to irradiate the skin surface. The photodiode 5 receives the light signal reflected from the skin and converts it into an electrical signal, which is then transmitted to the control circuit unit 6. The light source module includes an adjustable LED light source array, which includes blue LEDs 2 and green LEDs 14. The blue LEDs 2 are arranged in a ring with equal spacing on the control circuit. In unit 6, blue LED 2 emits wavelengths of 450-470nm, green LED 14 is fixedly installed at equal intervals between blue LED 2, and green LED 14 emits wavelengths of 520-540nm. Photodiode 5 is fixedly installed in the center of control circuit unit 6 and located between blue LED 2 and green LED 14. Photodiode 5 has a wide spectral response characteristic and is used to detect reflected light in the wavelength range of 400-700nm. Control circuit unit 6 includes microcontroller 4, analog-to-digital converter and data processing algorithm module. Microcontroller 4 is fixedly installed in the center of control circuit unit 6 and controls the emission timing of LED light source array. Analog-to-digital converter converts analog signal from photodiode 5 into digital signal. Data processing algorithm module calculates bilirubin concentration value based on dual-wavelength ratio method.

[0027] With the above technical solution, when using the device, the parent holds the handle 8 and places the outer shell 17 close to the newborn's forehead, chest, abdomen, etc., and then presses down the outer shell 17 to make it contact the skin. The alternately installed blue LED 2 and green LED 14 emit light of different wavelengths. Since different wavelengths of light have different propagation paths in the skin, blue light is mainly reflected in the epidermal layer and is significantly affected by bilirubin, while green light penetrates deeper and mainly reflects the hemoglobin content. Then, the installed photodiode 5 receives the light signal reflected by the skin. By calculating the ratio of the reflected light intensity of the two wavelengths, the interference of factors such as hemoglobin and skin thickness is eliminated, and the bilirubin concentration is accurately measured. The whole process adopts non-contact optical detection, which eliminates the risk of infection by eliminating the need for blood sampling, reduces the discomfort of newborns, and makes it convenient for parents to use in daily life.

[0028] Furthermore, symmetrical assembly slots 15 are provided on both sides of the inner wall of the detection slot 26. An ambient light sensor 16 and a temperature sensor 3 are fixedly installed inside the assembly slots 15, respectively. The temperature sensor 3 is used to detect the skin surface temperature, and the ambient light sensor 16 is used to detect the ambient light intensity. The control circuit unit 6 corrects the bilirubin concentration value and the luminous intensity of the LED light source based on the temperature data and light data. The data processing algorithm module adopts a dual-wavelength ratio algorithm, specifically:

[0029] Calculate the ratio of blue light reflection intensity to green light reflection intensity, R = I_blue / I_green;

[0030] The bilirubin concentration is calculated according to the preset calibration curve equation: TSB=a×ln(R)+b, where TSB is the transcutaneous bilirubin concentration, and a and b are calibration coefficients;

[0031] The handle portion 8 has an internal mounting slot 11, in which a battery 9, a wireless communication module 7, and a storage module 12 are fixedly installed. The battery 9, wireless communication module 7, and storage module 12 are all connected to the control circuit unit 6. The top surface of the handle portion 8 is provided with an operation button 22. A display screen 21 is provided between the operation button 22 and the outer shell 17. A charging interface 10 is provided on the end surface of the handle portion 8 away from the outer shell 17. The wireless communication module 7 supports Bluetooth and WiFi connections and can transmit test data to a smartphone APP or cloud server. The storage module 12 can store at least 1000 test records, including test time, bilirubin value, newborn information, and other data.

[0032] Please refer to Figures 1-4 During use, parents turn on the device by pressing and holding the power button on operation button 22. After entering the newborn's age, weight, and other basic information, they gently press the detection head onto the center of the newborn's forehead, maintaining stable contact, and then press the detection button. During this time, the battery 9 powers the entire device. The system uses the installed ambient light sensor 16 (detection range 0-100000 Lux) and temperature sensor 3 (detection range 30-42℃, accuracy ±0.1℃) to collect the intensity of natural light in the newborn's environment and the temperature of the newborn's skin surface, enabling automatic adaptation to the detection environment. Based on the obtained data, the system compensates and corrects the bilirubin concentration value based on the temperature data. The measured external light intensity is automatically adjusted by adjusting the LED light intensity to ensure that the detection accuracy is not affected by ambient light. After three seconds, the bilirubin concentration value is displayed on the display screen 21, along with reference suggestions. The detection results are also stored in the storage module 12. Parents can view historical records and trend changes through the APP. The entire device is small in size and lightweight, making it convenient for daily carrying and use.

[0033] Furthermore, the outer casing 17 is surrounded by a detection contact surface 13, which is cylindrical in shape. A light source emission hole 24 is provided at the center of the bottom of the detection contact surface 13. Light receiving holes 25 are symmetrically provided at equal intervals around the light source emission hole 24. Detection through holes 23 are symmetrically provided on both sides of the light receiving holes 25. The light source emission hole 24 is aligned with the photodiode 5, and the light receiving hole 25 is aligned with the blue LED 2 and the green LED 14. The detection through holes 23 are aligned with the ambient light sensor 16 and the temperature sensor 3. The detection contact surface 13 is made of medical-grade silicone material, which is soft and antibacterial. The outer wall of the outer casing 17 is provided with slots 1 at equal intervals. Elastic strips 18 are installed at equal intervals on the inner wall of the detection contact surface 13. The elastic strips 18 are fitted into the slots 1. Rubber strips 19 are installed at equal intervals on the bottom of the detection contact surface 13. Anti-slip grooves 20 are provided on the outer wall of the grip handle 8.

[0034] Please refer to Figures 1-6 During use, the installed detection contact surface 13 prevents direct contact between the outer shell 17 and the newborn's skin. The light source emission hole 24 and light receiving hole 25 ensure the normal operation of the photodiode 5, blue LED 2 and green LED 14. The soft silicone material fits tightly against the newborn's skin. Since the entire detection contact surface 13 is connected to the elastic strip 18 by the slot 1, after the test is completed, the detection contact surface 13 can be pulled to release the elastic strip 18 from the slot 1 for easy disassembly, cleaning and disinfection. The anti-slip groove 20 and rubber strip 19 not only increase the grip but also reduce the movement of the outer shell 17 by the friction between the rubber and the newborn's skin, ensuring that the detection point does not shift significantly and improving the accuracy of the pinpoint detection.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable home-use neonatal jaundice testing device, characterized in that... The device includes a grip handle (8), one end of which is fixedly mounted with a housing (17). A detection groove (26) is provided at the bottom of the housing (17). A control circuit unit (6), a light source module, and a photodiode (5) are arranged inside the detection groove (26). The control circuit unit (6) is fixedly mounted on the top of the inner wall of the detection groove (26). The light source module and the photodiode (5) are both fixedly mounted on the control circuit unit (6). The control circuit unit (6) is used to control the light source module to emit a light beam of a specific wavelength to irradiate the skin surface. The photodiode (5) receives the light signal reflected by the skin and converts it into an electrical signal, which is then transmitted to the control circuit unit (6).

2. The portable home-use neonatal jaundice testing device according to claim 1, characterized in that... The light source module includes an adjustable LED light source array, which includes blue LEDs (2) and green LEDs (14). The blue LEDs (2) are installed in a ring at equal intervals on the control circuit unit (6), and the emission wavelength of the blue LEDs (2) is 450-470nm. The green LEDs (14) are fixedly installed at equal intervals between the blue LEDs (2), and the emission wavelength of the green LEDs (14) is 520-540nm. The photodiode (5) is fixedly installed in the center of the control circuit unit (6) and located between the blue LEDs (2) and the green LEDs (14). The photodiode (5) has a wide spectral response characteristic and is used to detect reflected light in the wavelength range of 400-700nm.

3. The portable home-use neonatal jaundice testing device according to claim 2, characterized in that... The control circuit unit (6) includes a microcontroller (4), an analog-to-digital converter and a data processing algorithm module. The microcontroller (4) is fixedly installed in the center of the control circuit unit (6) and controls the light emission timing of the LED light source array. The analog-to-digital converter converts the analog signal of the photodiode (5) into a digital signal. The data processing algorithm module calculates the bilirubin concentration value based on the dual-wavelength ratio method.

4. The portable home-use neonatal jaundice testing device according to claim 3, characterized in that... The inner wall of the detection groove (26) is symmetrically provided with assembly grooves (15). An ambient light sensor (16) and a temperature sensor (3) are fixedly installed inside the assembly grooves (15). The temperature sensor (3) is used to detect the skin surface temperature, and the ambient light sensor (16) is used to detect the ambient light intensity. The control circuit unit (6) corrects the bilirubin concentration value and the luminous intensity of the LED light source based on the temperature data and light data. The data processing algorithm module adopts a dual-wavelength ratio algorithm, specifically: Calculate the ratio of blue light reflection intensity to green light reflection intensity, R = I_blue / I_green; The bilirubin concentration is calculated according to the preset calibration curve equation: TSB=a×ln(R)+b, where TSB is the transcutaneous bilirubin concentration, and a and b are calibration coefficients.

5. The portable home-use neonatal jaundice testing device according to claim 4, characterized in that... The grip handle (8) has an internal mounting slot (11) in which a battery (9), a wireless communication module (7), and a storage module (12) are fixedly installed. The battery (9), the wireless communication module (7), and the storage module (12) are all connected to the control circuit unit (6). The top surface of the grip handle (8) is provided with an operation button (22). A display screen (21) is provided between the operation button (22) and the outer shell (17). A charging interface (10) is provided on the end face of the grip handle (8) away from the outer shell (17).

6. The portable home-use neonatal jaundice testing device according to claim 5, characterized in that... The wireless communication module (7) supports Bluetooth and WiFi connections and can transmit the detection data to a smartphone APP or cloud server. The storage module (12) can store at least 1,000 detection records, including data such as detection time, bilirubin value, and newborn information.

7. The portable home-use neonatal jaundice testing device according to claim 6, characterized in that... The outer shell (17) is surrounded by a detection contact surface (13). The detection contact surface (13) is cylindrical. A light source emission hole (24) is opened at the center of the bottom of the detection contact surface (13). Light receiving holes (25) are symmetrically opened at equal intervals around the light source emission hole (24). Detection through holes (23) are symmetrically opened on both sides of the light receiving hole (25). The light source emission hole (24) is aligned with the photodiode (5). The light receiving hole (25) is aligned with the blue LED (2) and the green LED (14). The detection through hole (23) is aligned with the ambient light sensor (16) and the temperature sensor (3). The detection contact surface (13) is made of medical-grade silicone material, which is soft and antibacterial.

8. The portable home-use neonatal jaundice testing device according to claim 7, characterized in that... The outer wall of the outer shell (17) is provided with slots (1) at equal intervals, the inner wall of the detection contact surface (13) is provided with elastic strips (18) at equal intervals, the elastic strips (18) are fitted inside the slots (1), and the bottom of the detection contact surface (13) is provided with rubber strips (19) at equal intervals. The outer wall of the grip handle (8) is provided with anti-slip grooves (20).

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