Emergency cerebral hemorrhage detection device

Abstract

The invention relates to an emergency cerebral hemorrhage detection device which comprises a comb-shaped probe, a signal driving and resolving unit, a result calculation and storage unit, a wireless communication unit and a result output unit. The comb-shaped probe comprises a group of emission light sources and a multi-path detector, and a gyroscope is arranged at the top of the multi-path detector; a band-pass optical filter is arranged at a probe at the bottom of the multi-path detector; the signal driving and resolving unit comprises a lock-in amplifier, a frequency source and a laser driving module, one path of output of the frequency source is sent to the laser driving module for modulating a light source, the other path of output of the frequency source is used as a reference signal of the lock-in amplifier for demodulation, and after signals of the multi-path detector are demodulated and filtered by the lock-in amplifier, the amplitude of modulation frequency is obtained; performing threshold judgment on the amplitude, eliminating invalid measurement, and averaging effective measurement sections to obtain a light intensity output value of the detector; and the result calculation and storage unit is used for calculating a detection result according to a detection result formula and storing the detection result in the storage unit.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an emergency cerebral hemorrhage detection device. Background Art

[0002] Acute cerebral hemorrhage caused by traumatic brain injury often occurs in multiple scenarios such as traffic accidents, working in dangerous environments, violence, and sports. It is an important cause of death and disability and an important public health issue. Patients with cerebral hemorrhage suffer multiple physical and mental tortures, and early diagnosis, management and treatment of acute injuries can minimize the impact of secondary injuries and reduce the deterioration of the disease.

[0003] Currently, computed tomography is the gold standard for diagnosing and locating hematomas caused by cerebral hemorrhage. However, in the emergency treatment of cerebral hemorrhage, the patient needs to be transferred to a hospital with a radiology department for a CT scan, which is usually difficult to achieve in rural areas, natural disasters, or war zones, or requires a long transfer time. In the event that the patient encounters an accident and cannot be transferred, it is also impossible to quickly complete a diagnosis based on a CT scan, and emergency personnel are required to conduct a clinical assessment on site.

[0004] Brain hematoma usually corresponds to the change of optical properties of tissue. For human tissue, there is a near-infrared spectral window. After the light source passes through the tissue, it will not be completely absorbed by the human tissue. Therefore, by measuring the change of light intensity after the light passes through the tissue, the change of optical parameters of the tissue can be reflected, and then the distribution of each component in the tissue can be calculated. For hematoma detection, since the hemoglobin concentration in the hematoma is higher than the hemoglobin concentration in the brain tissue containing blood in the blood vessels, the blood outside the blood vessels absorbs more near-infrared light than the blood inside the blood vessels, and the absorbance of near-infrared light is greater.

[0005] The main technology at present is the American Infrascanner1000 / 2000 brain scanner, which mainly includes sensors based on near-infrared spectroscopy and data processing and display devices. The sensor includes a diode laser and a photodetector, which are coupled to the patient's scalp through two disposable light guides and directly contact the head skin. The distance between the light source and the detector is 4.0cm, and the absorbance can be measured in a tissue volume of 2cm wide and 2-3cm deep. The data processing and display module is used to control the laser power and adjust the detector gain, receive and set hardware parameters, and digitize the detector signal, process and display it in the interface. Infrascanner compares the left and right sides of the brain in four different areas. NIRS sensors are placed in the left and right frontal, temporal, parietal and occipital regions of the head in turn, and record the absorbance of light of the selected wavelength. Patient measurements can be completed in 2-3 minutes, with a sensitivity of 94% and a specificity of 96% for all bleeding within the detection capability of Infrascanner (bleeding more than 3.5mL). In patients requiring surgical intervention, the device showed 100% sensitivity.

[0006] The defects of the prior art mainly include:

[0007] 1. The existing technology generally adopts a dual-probe design, which has a limited collection range, is prone to missed detection, and has a long measurement time.

[0008] 2. The existing technical characterization value is the optical density contrast value, which cannot characterize the amount of bleeding and the scope of bleeding.

[0009] 3. The existing technology is a handheld stand-alone device that cannot be connected to the hospital system and has no direct result output device, which cannot meet the Chinese medical environment.

[0010] 4. In the prior art, the probe design is generally a light guide column or an optical fiber, and black hair can easily affect the measurement results.

[0011] 5. The current system uses a time-sharing measurement method. Ambient light and other system noises will affect the accuracy of the measured values. Summary of the invention

[0012] The present invention aims to provide an emergency cerebral hemorrhage detection device, and the technical problems to be solved include at least how to use a group of emitting light sources to automatically calibrate the measurement channels of a multi-channel detector in conjunction with a gyroscope, thereby increasing the measurement range and reducing the operation time and difficulty; not only being able to characterize the optical density contrast value, but also using an artificial intelligence algorithm to automatically calibrate its corresponding content; how to transmit the test results to a remote end or directly print out the results, and obtain an emergency disposal plan; how to increase the convenience of use while reducing the influence of hair on the test results; and how to use a multi-frequency modulation scheme in conjunction with an optical filtering component to filter out the influence of noise generated by natural light and ambient light to a limited extent.

[0013] In order to achieve the above-mentioned purpose, the present invention provides an emergency cerebral hemorrhage detection device, including a comb probe, a signal driving and solving unit, a result calculating and storing unit, a wireless communication unit and a result output unit; the comb probe includes a group of emitting light sources and a multi-channel detector, and a gyroscope is arranged on the top of the multi-channel detector, and the gyroscope is used to automatically calibrate the measurement channel; a bandpass filter is arranged at the probe at the bottom of the multi-channel detector, and the bandpass filter is used to ensure the smooth passage of the laser wavelength and filter out the optical noise outside the working wavelength, so as to avoid the ambient light from saturating the detector and improve the detection signal-to-noise ratio; the signal driving and solving unit includes a phase-locked amplifier, a frequency source and a laser driving module, and the frequency One output of the rate source is sent to the laser driving module for modulating the light source, and the other output is used as a reference signal of the phase-locked amplifier for demodulation. The signals of the multi-channel detectors are demodulated and filtered by the phase-locked amplifier to obtain the amplitude of the modulation frequency; a threshold judgment is performed on the amplitude, and after excluding invalid measurements, the effective measurement segments are averaged to obtain the light intensity output value of the detector; the result calculation and storage unit is used to calculate the test result according to the test result formula, and store the test result in the storage unit; the wireless communication unit is used to package the data collected by the detector and the test result and send them to the hospital management end; the result output unit is used to output the measurement value and the diagnosis suggestion given by the diagnosis personnel based on the test data.

[0014] Preferably, the test result formula is:

[0015] ΔOD=log 10 (I N / I H )

[0016] Among them, I N is the light intensity on the normal side, I H is the light intensity on the bleeding side, ΔOD is the calculated result, and when ΔOD is higher than the predetermined value, the hematoma detection is considered positive.

[0017] Preferably, the result calculation and storage unit is also used to establish a data set using the recorded ΔOD value and the amount of bleeding obtained by large-scale detection equipment, use an artificial intelligence algorithm to train a neural network, and establish a corresponding relationship between the ΔOD value and the amount of bleeding for people of different ages, weights and genders; in on-site emergency detection, the emergency cerebral hemorrhage detection device inputs the ΔOD value and the patient's age, gender and weight information as an input layer into a pre-trained neural network, gives a predicted value of the amount of bleeding, and synchronizes it to the medical personnel involved in remote diagnosis to guide on-site emergency rescue measures.

[0018] Preferably, the result output unit is a built-in printer that can directly print out the measured values ​​and diagnostic suggestions. The printed results can be used as a reference for subsequent medical personnel and can be inserted into the medical record as case information.

[0019] Preferably, the emergency cerebral hemorrhage detection device also includes a remote management terminal. In order to ensure the rapid debugging of the emergency cerebral hemorrhage detection device in different scenarios, the remote management terminal can also control the hardware parameters of the emergency cerebral hemorrhage detection device, provide timely technical support to front-line personnel, and ensure that the detection process is completed quickly.

[0020] Preferably, the emitting light source is arranged at the center of the comb-shaped probe, and the multi-path detector surrounds the emitting light source.

[0021] Preferably, the multi-channel detectors are evenly distributed on a circle with the emission light source as the center and a radius of 3 cm.

[0022] Preferably, the multi-channel detector includes a first detector, a second detector, a third detector and a fourth detector.

[0023] Preferably, the operating wavelength of the multi-channel detector is 750nm to 850nm, the emitting light source is a laser, and the central wavelength of the laser is 808nm.

[0024] Preferably, the bandpass filter is an absorptive neutral density filter.

[0025] Preferably, the comb-shaped probe can detect the outgoing light intensity at multiple positions and multiple directions at the same time, and the comb-shaped probe can pass through the "hair barrier" and make effective contact with the scalp.

[0026] Preferably, when measuring different brain regions, the gyroscope is used to automatically record the direction angle of the probe, so that the positioning of each probe relative to the scalp is recorded; when measuring the contralateral brain region, the gyroscope is used to calibrate according to the direction and angle of the previous measurement, so that the probe positions of each measurement pair correspond to each other, ensuring the symmetry of the measurement positions.

[0027] Preferably, the hardware parameters of the emergency cerebral hemorrhage detection device include laser output power, laser modulation frequency and detector amplification gain.

[0028] The present application also provides a detection method of an emergency cerebral hemorrhage detection device, comprising the following steps:

[0029] S1. Fix the comb-shaped probe at the measurement position according to medical standards; when measuring different brain regions, the gyroscope automatically records the direction and angle of the probe, so that the positioning of each probe relative to the scalp is recorded. When measuring the contralateral brain region, calibration is performed according to the direction and angle of the previous measurement, so that the probe positions of each measurement pair correspond to each other, ensuring the symmetry of the measurement position;

[0030] S2, sending one output of the frequency source to the laser driving module for modulating the light source, and another output as the reference signal of the phase-locked amplifier for demodulation. After the signals of the multi-channel detectors are demodulated and filtered by the phase-locked amplifier, the amplitude of the modulation frequency is obtained; a detection process outputs multiple frequency modulation signals in segments at fixed time intervals, and uses the corresponding reference frequency for demodulation to obtain the amplitudes of different detection segments; threshold judgment is performed on the amplitude, and after excluding invalid measurements, the valid measurement segments are averaged to obtain the light intensity output value of the detector;

[0031] S3. Calculate the test result according to the test result formula and store the test result in a storage unit; package the data collected by the detector and the test result and send them to the hospital management end; output the measurement value and the diagnostic suggestion given by the diagnostic personnel based on the test data.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The emergency cerebral hemorrhage detection device described in the present invention uses a group of emitting light sources to automatically calibrate the measurement channels of the multi-channel detectors in conjunction with a gyroscope, thereby increasing the measurement range and reducing the operation time and difficulty; it can not only characterize the optical density contrast value, but also automatically calibrate its corresponding content using an artificial intelligence algorithm; a wireless communication unit is added to transmit the detection results to a remote end in real time and obtain an emergency disposal plan, and a result output printing module is added to print out the output results as soon as possible; a comb-shaped probe design is adopted to increase the convenience of use and reduce the influence of hair on the detection results; a multi-frequency modulation scheme is adopted in conjunction with an optical filtering component to filter out the influence of noise generated by natural light and ambient light to a limited extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the specific implementation methods of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0035] Figure 1 It is a structural schematic diagram of the emergency cerebral hemorrhage detection device described in the present invention.

[0036] Figure 2 It is a schematic diagram of the structure of the comb probe of the present invention.

[0037] Figure 3 It is a bottom view of the comb probe of the present invention.

[0038] Figure 4 It is a schematic diagram of the principle of signal driving and solving. DETAILED DESCRIPTION

[0039] The present invention is described in more detail hereinafter to facilitate understanding of the present invention.

[0040] like Figures 1 to 4 As shown, the emergency cerebral hemorrhage detection device of the present invention includes a comb probe, a signal driving and solving unit, a result calculating and storing unit, a wireless communication unit and a result output unit.

[0041] 1. Use a group of emitting light sources to form a comb-shaped probe structure for multi-channel detectors, and use optical filtering components to reduce the impact of ambient light noise. The probe is equipped with a gyroscope to automatically calibrate the measurement channel.

[0042] The existing technology generally adopts a dual-probe design, that is, a light source emits laser light, and a detector detects light after being absorbed and refracted by tissue. When the tissue distribution is uneven, the scalp curvature is too large, or the detection position is covered with a lot of hair, skull or impurities that affect light transmission, it is easy to cause missed detection. Subsequent detection requires continuous movement of the detection position, resulting in prolonged measurement time.

[0043] The multi-probe design is as follows: the center of the probe is light source 1, and multiple detectors are distributed with a radius of 3 cm. Figure 2 and Figure 3 This is an example of four detectors. In order to prevent ambient light from saturating the detector, an absorption neutral density filter is added to the detector probe, with an operating wavelength of 750-850nm and a laser center wavelength of 808nm. The bandpass filter ensures that the laser wavelength passes smoothly and filters out optical noise outside the working wavelength, preventing ambient light from saturating the detector while improving the detection signal-to-noise ratio.

[0044] Multiple probes form a comb probe, which can detect the outgoing light intensity in multiple positions and directions at the same time. The design of the comb probe ensures that the probe can pass through the "hair obstacle" and better contact the scalp.

[0045] The probe is equipped with a gyroscope. When measuring different brain regions, the probe direction angle is automatically recorded, so that the positioning of each probe relative to the scalp is recorded. When measuring the contralateral brain region, it is calibrated according to the direction and angle of the previous measurement, so that the probe positions of each measurement pair correspond to each other, ensuring the symmetry of the measurement position. (Each measurement requires two measurement positions, that is, one measurement on the left side and one measurement on the right side. The measurement position on the left side and the measurement position on the right side are called a measurement pair. The selection of measurement positions should follow medical standards.)

[0046] 2. The optical density value is defined by:

[0047] The normal testing process is as follows:

[0048] ΔOD=log 10 (I N / I H )

[0049] I N is the light intensity on the normal side, I H is the light intensity on the bleeding side, ΔOD is the detected signal, and when ΔOD is higher than a certain value, the hematoma detection is considered positive. The larger the ΔOD, the greater the difference in optical parameter absorbance between the bleeding side and the normal side, and the greater the amount of bleeding.

[0050] When the left and right sides of the same brain region are detected separately, the absorbance on the hematoma side is greater and the light intensity output value is smaller. N is the light intensity output value on the normal side, I H is the light intensity output value on the bleeding side, that is, I N with I H The side with the smaller light intensity output value is considered the bleeding side. ΔOD is the result calculated by the detected light intensity output value. When ΔOD is higher than a certain value, the hematoma detection is considered positive. The larger the ΔOD, the greater the difference in optical parameter absorbance between the bleeding side and the normal side, and the greater the amount of bleeding.

[0051] After the initial detection using the instrument, for patients who are easy to scan with CT, MRI and other means, the recorded ΔOD value and the amount of bleeding obtained by large-scale detection equipment are used to establish a data set, and the neural network is trained using artificial intelligence algorithms to establish a corresponding relationship between the ΔOD value and the amount of bleeding for people of different ages, weights, genders, etc. In on-site emergency detection, the ΔOD value and the patient's age, gender, weight and other information are input as the input layer into the pre-trained neural network. The instrument gives a predicted value of the amount of bleeding and synchronizes it to the medical staff involved in remote diagnosis to guide on-site emergency rescue measures.

[0052] 3. Add wireless communication unit and result output unit

[0053] In outdoor emergency measurement scenarios, the device not only communicates with the remote management system, but also adds a result output function. The main data flow is that after the detector collects and solves the data, it is first stored in the system memory and packaged and sent to the hospital management end. The diagnostic personnel give the diagnosis results based on the test data and indicate the next rescue plan. In addition, to improve efficiency and convenience, the device is equipped with a built-in printer that can directly print out the measured values ​​and diagnostic suggestions. The printed results can be used as a reference for the next medical staff and can be inserted into the medical record as a case file. In order to ensure the rapid debugging of the instrument in different scenarios, the remote management end can also control the instrument hardware parameters, such as laser output power, laser modulation frequency, detector amplification gain, etc., and provide timely technical support to front-line personnel to ensure that the detection process is completed quickly.

[0054] 4. Use a multi-frequency modulation scheme and cooperate with optical filtering components to filter the optical noise generated by natural light and ambient light.

[0055] The existing technology uses square wave modulation, that is, turning the light source on and off at a fixed frequency, and then extracting the signal of the detector during the time period when the light source is turned on for calculation to obtain the average light intensity. Since the general application scenario of the emergency detection device for cerebral hemorrhage is outdoor accident scenes, the lighting environment is difficult to control, and the use of direct current light for detection is easily interfered by ambient light.

[0056] This application adopts a multi-frequency modulation scheme, using a directly modulated current-driven laser. The light intensity is sinusoidally modulated and output to the scalp. After absorption and refraction by the scalp, the detector signal is mixed with modulated light and ambient light. One frequency source output is used to modulate the light source, and the other is used as a reference signal for the phase-locked amplifier for demodulation. The detector signal is demodulated and filtered by the phase-locked amplifier to obtain the amplitude of the modulation frequency, which can be used as the light intensity output value I N with I H , substitute into the formula ΔOD=log 10 (I N / I H ) is used to calculate the light density. Since the ambient light or stray light signal is not modulated, it will not affect the demodulated output signal, thus enhancing the signal-to-noise ratio.

[0057] Furthermore, in order to exclude the influence of frequency light sources of other instruments or equipment during the detection process, a detection process outputs multiple frequency modulated signals in segments at fixed time intervals, and uses the corresponding reference frequency for demodulation to obtain the amplitudes of different detection segments. After threshold judgment is performed on these signal amplitudes, invalid measurements are excluded (for example, the probe position is not correctly placed, such as not close to the scalp, hair is blocked, the ambient light intensity is too high, etc., at this time, the photoelectric detector does not obtain the frequency modulated light signal, and the amplitude of this frequency point is compared with the amplitude of the frequency point in the white noise area. When the ratio of the two is less than 20dB, it is considered that the amplitude belongs to invalid measurement), and then the effective measurement segments are averaged to obtain the light intensity output value of one detector.

[0058] Based on the above content, the present application provides an emergency cerebral hemorrhage detection device, which includes a comb probe, a signal driving and solving unit, a result calculation and storage unit, a wireless communication unit and a result output unit; the comb probe includes a group of emitting light sources 1 and a multi-channel detector, and a gyroscope 2 is arranged on the top of the multi-channel detector, and the gyroscope is used to automatically calibrate the measurement channel; a bandpass filter is arranged at the probe at the bottom of the multi-channel detector, and the bandpass filter is used to ensure that the laser wavelength passes smoothly, and at the same time filter out optical noise outside the working wavelength, so as to avoid ambient light from saturating the detector while improving the detection signal-to-noise ratio; the signal driving and solving unit includes a phase-locked amplifier, a frequency source and a laser driver The module comprises a frequency source, one output of which is sent to a laser driving module for modulating a light source, and another output of which is used as a reference signal of a phase-locked amplifier for demodulation. After the signals of the multi-channel detectors are demodulated and filtered by the phase-locked amplifier, the amplitude of the modulation frequency is obtained; a threshold value is judged on the amplitude, and after excluding invalid measurements, the valid measurement segments are averaged to obtain the light intensity output value of the detector; the result calculation and storage unit is used to calculate the detection result according to the detection result formula, and store the detection result in the storage unit; the wireless communication unit is used to package the data collected by the detector and the detection result and send them to the hospital management end; the result output unit is used to output the measurement value and the diagnosis suggestion given by the diagnosis personnel based on the detection data.

[0059] Preferably, the test result formula is:

[0060] ΔOD=log 10 (I N / I H )

[0061] Among them, I N is the light intensity on the normal side, I His the light intensity on the bleeding side, ΔOD is the calculated result, and when ΔOD is higher than the predetermined value, the hematoma detection is considered positive. The larger the ΔOD, the greater the difference in optical parameter absorbance between the bleeding side and the normal side, and the greater the amount of bleeding.

[0062] Preferably, the result calculation and storage unit is also used to establish a data set using the recorded ΔOD value and the amount of bleeding obtained by large-scale detection equipment, use an artificial intelligence algorithm to train a neural network, and establish a corresponding relationship between the ΔOD value and the amount of bleeding for people of different ages, weights and genders; in on-site emergency detection, the emergency cerebral hemorrhage detection device inputs the ΔOD value and the patient's age, gender and weight information as an input layer into a pre-trained neural network, gives a predicted value of the amount of bleeding, and synchronizes it to the medical personnel involved in remote diagnosis to guide on-site emergency rescue measures.

[0063] Preferably, the result output unit is a built-in printer that can directly print out the measured values ​​and diagnostic suggestions. The printed results can be used as a reference for subsequent medical personnel and can be inserted into the medical record as case information.

[0064] Preferably, the emergency cerebral hemorrhage detection device also includes a remote management terminal. In order to ensure the rapid debugging of the emergency cerebral hemorrhage detection device in different scenarios, the remote management terminal can also control the hardware parameters of the emergency cerebral hemorrhage detection device (such as laser output power, laser modulation frequency, detector amplification gain, etc.), and provide timely technical support to front-line personnel to ensure that the detection process is completed quickly.

[0065] Preferably, the emitting light source 1 is arranged at the center of the comb-shaped probe, and the multi-path detector surrounds the emitting light source 1 .

[0066] Preferably, the multi-channel detectors are evenly distributed on a circle with the emission light source 1 as the center and a radius of 3 cm.

[0067] Preferably, the multi-channel detector includes a first detector 3 , a second detector 4 , a third detector 5 and a fourth detector 6 .

[0068] Preferably, the operating wavelength of the multi-channel detector is 750nm to 850nm, the emitting light source 1 is a laser, and the central wavelength of the laser is 808nm.

[0069] Preferably, the bandpass filter is an absorptive neutral density filter.

[0070] Preferably, the comb-shaped probe can detect the outgoing light intensity at multiple positions and multiple directions at the same time, and the comb-shaped probe can pass through the "hair barrier" and make effective contact with the scalp.

[0071] Preferably, when measuring different brain regions, the gyroscope is used to automatically record the direction angle of the probe, so that the positioning of each probe relative to the scalp is recorded; when measuring the contralateral brain region, the gyroscope is used to calibrate according to the direction and angle of the previous measurement, so that the probe positions of each measurement pair correspond to each other, ensuring the symmetry of the measurement positions.

[0072] Figure 4 In the equation, Sin(ω1t), Sin(ω2t), Sin(ω3t)... refer to the modulation signals of different frequencies output by the frequency source. The modulation signals of frequencies ω1t, ω2t, ω3t... are output to the laser driver in one direction, so that the light intensity amplitude is modulated; the other frequency signal is used as the reference signal of the phase-locked amplifier and multiplied by the output signal of the detector. Since the light intensity of the light source is modulated, the output signal of the detector can be expressed as A1Sin(ω1t)+D1A2Sin(ω2t)+D2A3Sin(ω3t)+D3..., where A1, A2, A3... are the amplitudes of the frequencies ω1t, ω2t, ω3t..., and D1, D2, D3... are DC bias values. After entering the phase-locked amplifier output, the amplitudes A1, A2, A3... are obtained as the light intensity output values.

[0073] The present application also provides a detection method of an emergency cerebral hemorrhage detection device, comprising the following steps:

[0074] S1. Fix the comb-shaped probe at the measurement position according to medical standards; when measuring different brain regions, the gyroscope automatically records the direction and angle of the probe, so that the positioning of each probe relative to the scalp is recorded. When measuring the contralateral brain region, calibration is performed according to the direction and angle of the previous measurement, so that the probe positions of each measurement pair correspond to each other, ensuring the symmetry of the measurement position;

[0075] S2, sending one output of the frequency source to the laser driving module for modulating the light source, and another output as the reference signal of the phase-locked amplifier for demodulation. After the signals of the multi-channel detectors are demodulated and filtered by the phase-locked amplifier, the amplitude of the modulation frequency is obtained; a detection process outputs multiple frequency modulation signals in segments at fixed time intervals, and uses the corresponding reference frequency for demodulation to obtain the amplitudes of different detection segments; threshold judgment is performed on the amplitude, and after excluding invalid measurements, the valid measurement segments are averaged to obtain the light intensity output value of the detector;

[0076] S3. Calculate the test result according to the test result formula and store the test result in a storage unit; package the data collected by the detector and the test result and send them to the hospital management end; output the measurement value and the diagnostic suggestion given by the diagnostic personnel based on the test data.

[0077] The key technical points of this application include:

[0078] 1. This application uses a set of emitting light sources to automatically calibrate the measurement channels of the multi-channel detectors in conjunction with the gyroscope, thereby increasing the measurement range and reducing the operation time and difficulty.

[0079] 2. This application can not only characterize the optical density contrast value, but also automatically calibrate its corresponding content using an artificial intelligence algorithm.

[0080] 3. This application adds a wireless communication unit, which can transmit the test results to a remote end and obtain emergency response plans.

[0081] 4. This application adopts a comb-shaped probe design, which increases the convenience of use and reduces the impact of hair on the test results.

[0082] 5. This application uses a multi-frequency modulation scheme in conjunction with an optical filtering component to filter out the influence of noise generated by natural light and ambient light.

[0083] The above describes the preferred embodiments of the present invention, but it is not intended to limit the present invention. Those skilled in the art may make improvements and changes to the embodiments disclosed herein without departing from the scope and spirit of the present invention.

Claims

1. An emergency cerebral hemorrhage detection device, characterized in that: The emergency cerebral hemorrhage detection device comprises a comb probe, a signal driving and solving unit, a result calculating and storing unit, a wireless communication unit and a result output unit; the comb probe comprises a group of emitting light sources and a multi-channel detector, a gyroscope is arranged on the top of the multi-channel detector, and the gyroscope is used to automatically calibrate the measurement channel; a bandpass filter is arranged at the probe at the bottom of the multi-channel detector, and the bandpass filter is used to ensure the smooth passage of the laser wavelength, and filter out the light noise outside the working wavelength, so as to avoid the ambient light from saturating the detector and improve the detection signal-to-noise ratio; the signal driving and solving unit comprises a phase-locked amplifier, a frequency source and a laser driving module, one output of the frequency source is sent to the laser driving module for modulating the light source, and the other output is used as a reference signal of the phase-locked amplifier for demodulation, and the signal of the multi-channel detector is demodulated and filtered by the phase-locked amplifier to obtain the amplitude of the modulation frequency; the amplitude is subjected to a threshold judgment, and after excluding invalid measurements, the effective measurement segments are averaged to obtain the light intensity output value of the detector; the result calculating and storing unit is used to calculate the detection result according to the detection result formula, and store the detection result in the storage unit; The wireless communication unit is used to package the data collected by the detector and the test results and send them to the hospital management end; the result output unit is used to output the measurement values ​​and the diagnostic suggestions given by the diagnostic personnel based on the test data.

2. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The test result formula is: ΔOD=log 10 (I N / I H ) Among them, I N is the light intensity on the normal side, I H is the light intensity on the bleeding side, ΔOD is the calculated result, and when ΔOD is higher than the predetermined value, the hematoma detection is considered positive.

3. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The result calculation and storage unit is also used to establish a data set using the recorded ΔOD value and the amount of bleeding obtained by the large-scale detection equipment, and to train the neural network using an artificial intelligence algorithm to establish a corresponding relationship between the ΔOD value and the amount of bleeding for people of different ages, weights and genders; In on-site emergency detection, the emergency cerebral hemorrhage detection device inputs the ΔOD value and the patient's age, gender and weight information as the input layer into a pre-trained neural network, gives a predicted value of the amount of bleeding, and synchronizes it to the medical personnel involved in the remote diagnosis to guide on-site emergency rescue measures.

4. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The result output unit is a built-in printer that can directly print out the measured values ​​and diagnostic suggestions. The printed results can be used as a reference for subsequent medical personnel and can be inserted into the medical record as case information.

5. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The emergency cerebral hemorrhage detection device also includes a remote management terminal. In order to ensure the rapid debugging of the emergency cerebral hemorrhage detection device in different scenarios, the remote management terminal can also control the hardware parameters of the emergency cerebral hemorrhage detection device, provide timely technical support to front-line personnel, and ensure that the detection process is completed quickly.

6. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The emitting light source is arranged at the center of the comb-shaped probe, and the multi-path detector surrounds the emitting light source.

7. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The multi-channel detectors are evenly distributed on a circle with the emission light source as the center and a radius of 3 cm.

8. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The multi-channel detector comprises a first detector, a second detector, a third detector and a fourth detector.

9. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The working wavelength of the multi-channel detector is 750nm to 850nm, the emitting light source is a laser, and the central wavelength of the laser is 808nm.

10. The emergency cerebral hemorrhage detection device according to claim 1, characterized in that: The bandpass filter is an absorption neutral density filter.

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