Jugular vein blood oxygen monitoring method and device, jugular vein blood oxygen monitoring system

Abstract

The present invention provides a jugular vein blood oxygen monitoring method and device, and a jugular vein blood oxygen monitoring system. The method is implemented based on a jugular vein blood oxygen sensor arranged on the neck of a measured user, and includes: obtaining the circumference information of the neck of the measured user, determining a first distance according to the circumference information, and adjusting the distance between the light source array and the receiver array in the jugular vein blood oxygen sensor to the first distance; controlling the jugular vein blood oxygen sensor to detect the neck of the measured user, and obtaining the light signal data of the receiver array; obtaining the blood flow fluctuation information of the measured user, and determining the filtering frequency band of a preset bandpass filter; filtering the light signal data based on the bandpass filter that determines the filtering frequency band; processing the filtered light signal data based on the Lambert-Beer law to obtain the jugular vein blood oxygen content of the measured user. The present invention can effectively improve the monitoring accuracy while ensuring simplicity.

Description

Technical Field

[0001] The present invention belongs to the technical field of data processing, and more specifically, relates to a jugular vein blood oxygen monitoring method and device, and a jugular vein blood oxygen monitoring system. Background Art

[0002] The monitoring of jugular venous oxygen is extremely important, as it directly affects the assessment of jugular venous pulsation. Therefore, there are many methods for jugular venous oxygen monitoring in the prior art. Among them, the jugular venous oxygen monitoring methods in the prior art are mainly divided into two categories: invasive monitoring and non-invasive monitoring. The invasive monitoring method has a relatively high accuracy rate, but is not convenient and fast enough. Although the non-invasive monitoring method is relatively simple, it is easily affected by various factors during monitoring, resulting in low monitoring accuracy.

[0003] Therefore, the present application aims to provide a jugular vein blood oxygen monitoring solution to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a jugular vein blood oxygen monitoring method and device, and a jugular vein blood oxygen monitoring system to solve the problem that the jugular vein blood oxygen monitoring scheme in the prior art is not simple or accurate enough.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a jugular venous oxygen monitoring method, which is implemented based on a jugular venous oxygen sensor arranged on the neck of a user to be measured; the jugular venous oxygen sensor includes a light source array and a receiver array arranged in parallel, and the distance between the light source array and the receiver array is adjustable; when the jugular venous oxygen sensor performs neck detection, the array direction of the light source array and the receiver array is consistent with the neck direction of the user to be measured; the jugular venous oxygen monitoring method includes:

[0006] Acquire the circumference information of the neck of the measured user, determine the first distance according to the circumference information, and adjust the distance between the light source array and the receiver array to the first distance;

[0007] Controlling the jugular vein blood oxygen sensor to detect the neck of the user being tested, and obtaining optical signal data of the receiver array;

[0008] Acquire blood flow fluctuation information of the measured user, and determine a filter frequency band of a preset bandpass filter according to the blood flow fluctuation information; filter the optical signal data based on the bandpass filter with the determined filter frequency band;

[0009] The filtered optical signal data is processed based on the Lambert-Beer law to obtain the jugular venous blood oxygen content of the measured user.

[0010] In a possible implementation manner, the circumference information includes a neck circumference of a measured user; and determining the first distance according to the circumference information includes:

[0011] Determine the neck circumference range to which the measured user's neck circumference belongs;

[0012] The first distance is determined based on a correspondence between a pre-calibrated neck circumference range and the first distance.

[0013] In a possible implementation, the jugular vein blood oxygen monitoring method further includes:

[0014] To set multiple neck circumference ranges, perform the following steps for any set neck circumference range:

[0015] Obtaining a first jugular venous blood oxygen content of a target user; the target user is a user who meets the neck circumference range and has undergone invasive jugular venous blood oxygen testing, and the first jugular venous blood oxygen content is a jugular venous blood oxygen content measured when the target user undergoes invasive jugular venous blood oxygen testing;

[0016] The distance between the light source array and the receiver array is adjusted to different distances; and after each distance adjustment, the jugular vein blood oxygen sensor after the distance adjustment is used to detect the neck of the target user, and the jugular vein blood oxygen content of the target user is calculated according to the neck detection result to obtain a second jugular vein blood oxygen content;

[0017] The difference between the first jugular venous oxygen content and each second jugular venous oxygen content is calculated, and the distance corresponding to the second jugular venous oxygen content having the smallest difference with the first jugular venous oxygen content is determined as the first distance corresponding to the neck circumference range.

[0018] In a possible implementation, the jugular vein blood oxygen sensor further includes a bendable fixing device, and the light source array and the receiver array are arranged on the fixing device; when the jugular vein blood oxygen sensor performs neck detection, the fixing device is closely attached to the neck of the measured user; the circumference information includes the neck circumference of the measured user, the length of the neck of the measured user in the left-right direction, and the length of the neck of the measured user in the front-back direction;

[0019] Before adjusting the distance between the light source array and the receiver array to a first distance, the jugular vein blood oxygen monitoring method further includes:

[0020] The cross section of the neck of the user being measured is equivalent to an ellipse, and the conic section formula of the ellipse is determined according to the neck circumference of the user being measured, the length of the neck of the user being measured in the left-right direction, and the length of the neck of the user being measured in the front-back direction;

[0021] An arc length corresponding to the first distance is determined based on the conic section formula, and the first distance is updated to the arc length.

[0022] In a possible implementation, after obtaining the jugular venous blood oxygen content of the measured user, the jugular venous blood oxygen monitoring method further includes:

[0023] Acquiring the ambient brightness and the light source brightness when the jugular vein blood oxygen sensor performs detection, and calculating the correction coefficient of the jugular vein blood oxygen content based on the ambient brightness and the light source brightness;

[0024] The obtained jugular venous blood oxygen content is corrected based on the correction factor.

[0025] In a possible implementation, the calculation of the correction coefficient of the jugular venous blood oxygen content based on the ambient brightness and the light source brightness includes:

[0026] The ambient brightness and light source brightness are input into a pre-trained deep learning model to obtain a correction coefficient for jugular vein blood oxygen content.

[0027] In a possible implementation, the jugular vein blood oxygen monitoring method further includes:

[0028] Obtaining a first jugular venous blood oxygen content of a target user; the target user is a user who meets the neck circumference range and has undergone invasive jugular venous blood oxygen testing, and the first jugular venous blood oxygen content is a jugular venous blood oxygen content measured when the target user undergoes invasive jugular venous blood oxygen testing;

[0029] Taking the target user as the user to be tested, performing neck detection on the target user based on the jugular vein blood oxygen sensor and obtaining the jugular vein blood oxygen content corresponding to the target user;

[0030] determining a theoretical correction factor based on a ratio of the first jugular vein blood oxygen content to the jugular vein blood oxygen content;

[0031] Acquire the ambient brightness and light source brightness when the jugular vein blood oxygen sensor detects the neck of the target user;

[0032] The ambient brightness and light source brightness when the neck of the target user is detected and the theoretical correction coefficient are used as a training set, and the deep learning model is obtained by training based on the training set.

[0033] In a possible implementation, the correcting the initial jugular venous blood oxygen content based on the correction coefficient to obtain the final jugular venous blood oxygen content includes:

[0034] The product of the correction factor and the initial jugular venous blood oxygen content is determined as the final jugular venous blood oxygen content.

[0035] In another aspect of the present invention, a jugular vein blood oxygen monitoring terminal is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the jugular vein blood oxygen monitoring method described above when executing the computer program.

[0036] In another aspect of the present invention, there is provided a jugular vein blood oxygen monitoring system, comprising:

[0037] A jugular venous blood oxygen sensor and the jugular venous blood oxygen monitoring terminal described above which is electrically connected to the jugular venous blood oxygen sensor;

[0038] The jugular vein blood oxygen sensor comprises a fixing device and a light source array and a receiver array arranged in parallel on the fixing device, wherein the distance between the light source array and the receiver array is adjustable; the light source array comprises a plurality of near-infrared light sources arranged in sequence, and the receiver array comprises a plurality of light source receivers arranged in sequence, wherein the near-infrared light sources correspond to the light source receivers one by one;

[0039] When the jugular vein blood oxygen sensor performs neck detection, the fixing device is closely attached to the neck of the user being measured, the array directions of the light source array and the receiver array are consistent with the direction of the neck of the user being measured, the near-infrared light source on the fixing device emits near-infrared light, and after the near-infrared light is scattered on the neck of the user being measured, the light source receiver on the fixing device receives the scattered near-infrared light signal, and the near-infrared light signal is used to calculate the jugular vein blood oxygen content of the user being measured.

[0040] The beneficial effects of the jugular vein blood oxygen monitoring method and device, and the jugular vein blood oxygen monitoring system provided by the present invention are:

[0041] The inventor of the present application has analyzed and verified the factors that affect the accuracy of monitoring during non-invasive monitoring of jugular venous oxygen, and found that the circumference of the neck will affect the propagation of the detection light of the light source array in the neck, and the blood flow fluctuation in the neck of the user being measured will also affect the absorption of the detection light, thereby affecting the monitoring of the jugular venous oxygen content. Therefore, based on this discovery, the embodiment of the present invention provides a jugular venous oxygen monitoring solution.

[0042] In a first aspect, an embodiment of the present invention provides a jugular venous oxygen monitoring sensor, in which the distance between the light source array and the receiver array is adjustable. On this basis, the embodiment of the present invention can adjust the distance between the light source array and the receiver array according to the circumference information of the neck of the measured user to ensure that the light emitted by the light source array can be fully scattered and absorbed in the neck of the measured user, thereby improving the monitoring accuracy of jugular venous oxygen.

[0043] In the second aspect, after acquiring the optical signal data of the receiver array, the embodiment of the present invention also acquires the blood flow fluctuation of the measured user, and then determines the filtering range of the bandpass filter according to the blood flow fluctuation of the measured user, thereby effectively filtering out the noise information in the optical signal data, and then obtaining more accurate optical signal data, and on this basis, calculating the jugular vein blood oxygen content based on the aforementioned more accurate optical signal data. Based on the solution of the embodiment of the present invention, the influence of the blood flow fluctuation of the measured user on the jugular vein blood oxygen monitoring can be effectively reduced, thereby improving the accuracy of jugular vein blood oxygen monitoring.

[0044] In summary, the embodiment of the present invention proposes a new non-invasive jugular venous oxygen monitoring solution. Based on the solution of the embodiment of the present invention, the monitoring accuracy can be effectively improved while ensuring simplicity. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of the arrangement of a light source array and a receiver array provided in one embodiment of the present invention;

[0047] Figure 2 A schematic diagram of an application of a jugular vein blood oxygen sensor provided by an embodiment of the present invention;

[0048] Figure 3 A schematic diagram of a flow chart of a jugular vein blood oxygen monitoring method provided by an embodiment of the present invention;

[0049] Figure 4 A schematic diagram of the structure of a jugular vein blood oxygen sensor provided by an embodiment of the present invention;

[0050] Figure 5 A schematic diagram of a module composed of a light source array and a receiver array provided in one embodiment of the present invention;

[0051] Figure 6A schematic diagram of an equivalent neck provided by an embodiment of the present invention;

[0052] Figure 7 A schematic diagram of the structure of a jugular vein blood oxygen monitoring terminal provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] The jugular vein blood oxygen monitoring method is implemented based on a jugular vein blood oxygen sensor set on the neck of the user being tested. Figure 1 As shown, the jugular vein blood oxygen sensor includes a light source array and a receiver array arranged in parallel, and the distance d between the light source array and the receiver array is adjustable. When the jugular vein blood oxygen sensor performs neck detection, the array direction of the light source array and the receiver array is consistent with the neck direction of the user being tested. The array direction of the light source array and the receiver array refers to the extension direction of the array, such as Figure 1 The light source array and receiver array shown in the figure have the array direction of left and right (because the light source or light source receiver are arranged from left to right). The neck direction is also the extension direction of the neck. When the human body is standing normally, the neck direction is also the vertical direction. On this basis, the array direction of the light source array and the receiver array is consistent with the neck direction of the user being tested. Figure 2 .

[0056] Among them, when the jugular vein blood oxygen sensor is at the neck of the user being measured, each light source in the light source array will emit near-infrared light. After the near-infrared light is absorbed and scattered by the neck of the user being measured, the scattered near-infrared light will be received by the receiver in the receiver array. On this basis, the jugular vein blood oxygen content of the user being measured can be calculated based on the near-infrared light received by the receiver. Specifically, the absorption of near-infrared light by the neck can be judged based on the near-infrared light received by the receiver, and the jugular vein blood oxygen content of the user being measured can be judged based on the absorption.

[0057] Based on the above description, you can refer to Figure 3 , Figure 3 A schematic flow chart of a jugular vein blood oxygen monitoring method provided in an embodiment of the present invention, the jugular vein blood oxygen monitoring method comprising:

[0058] S101: Obtain circumference information of the neck of the measured user, determine a first distance according to the circumference information, and adjust the distance between the light source array and the receiver array to the first distance.

[0059] In this embodiment, the circumference information of the neck of the measured user includes but is not limited to the circumference of the neck of the measured user, the length of the neck of the measured user in the left-right direction, and the length of the neck of the measured user in the front-back direction. The left-right direction and the front-back direction are both based on the human body as a reference, the length of the neck in the left-right direction is also the length of the neck in the direction of the human shoulder line, and the length of the neck in the front-back direction is also the length of the neck in the "front chest-back" direction.

[0060] In this embodiment, a suitable first distance can be determined based on the circumference information to ensure that the near-infrared light has a suitable optical path, ensuring that it can reach the deep layer of the neck without causing excessive scattering / absorption or near-infrared light penetrating the neck due to a long optical path, thereby causing the receiver to be unable to effectively receive the near-infrared light and affecting the monitoring of the blood oxygen content in the neck.

[0061] S102: Control the jugular vein blood oxygen sensor to detect the neck of the user being tested, and obtain optical signal data of the receiver array.

[0062] In this embodiment, the jugular venous oxygen sensor can be placed close to the neck of the user being measured. At this time, each light source in the light source array will emit near-infrared light. After the near-infrared light is absorbed and scattered by the neck of the user being measured, the scattered near-infrared light will be received by the receivers in the receiver array, and the near-infrared light signal received by the receiver array that is not absorbed by the neck of the user being measured can be obtained. The jugular venous oxygen content of the user being measured is calculated based on the light signal data received by the receiver array.

[0063] S103: Obtain blood flow fluctuation information of the user being tested, and determine a filter frequency band of a preset bandpass filter according to the blood flow fluctuation information. Filter the optical signal data based on the bandpass filter of the determined filter frequency band.

[0064] In this embodiment, considering that there are many blood vessels and other tissues in the neck, these tissues will absorb a certain amount of near-infrared light, thereby affecting the accuracy of jugular vein blood oxygen content monitoring. Therefore, the embodiment of the present invention considers obtaining the blood flow fluctuation information of the measured user, which is used to describe the absorption of near-infrared light by blood vessels and other tissues. On this basis, the filtering frequency band of the bandpass filter can be determined according to the blood flow fluctuation information. On this basis, the optical signal data is filtered based on the bandpass filter with the determined filtering frequency band to filter out interference information. Among them, the blood flow fluctuation information includes but is not limited to heartbeat information, pulse information, breathing information, and blood pressure information.

[0065] In this embodiment, the blood flow fluctuation information of the measured user can be input into a pre-trained machine learning model to obtain a preset filtering frequency band of the bandpass filter. That is, the machine learning model can be pre-trained to learn the intrinsic relationship between the blood flow fluctuation information and the aforementioned filtering frequency band. On this basis, the blood flow fluctuation information of the measured user is directly input into the trained machine learning model to obtain the corresponding filtering frequency band to achieve effective filtering of the optical signal data. Among them, the machine learning model described in the embodiment of the present invention is implemented based on the principle of machine learning. Regarding machine learning, there are many descriptions in the prior art, which will not be repeated in this embodiment.

[0066] S104: Process the filtered optical signal data based on the Lambert-Beer law to obtain the jugular venous blood oxygen content of the measured user.

[0067] In this embodiment, "processing the optical signal data based on the Lambert-Beer law to calculate the jugular venous blood oxygen content" can be achieved based on existing means, which will not be elaborated in this embodiment.

[0068] The inventor of the present application has analyzed and verified the factors that affect the accuracy of monitoring during non-invasive monitoring of jugular venous oxygen, and found that the circumference of the neck will affect the propagation of the detection light of the light source array in the neck, and the blood flow fluctuation in the neck of the user being measured will also affect the absorption of the detection light, thereby affecting the monitoring of the jugular venous oxygen content. Therefore, based on this discovery, the embodiment of the present invention provides a jugular venous oxygen monitoring solution.

[0069] In a first aspect, an embodiment of the present invention provides a jugular venous oxygen monitoring sensor, in which the distance between the light source array and the receiver array is adjustable. On this basis, the embodiment of the present invention can adjust the distance between the light source array and the receiver array according to the circumference information of the neck of the measured user to ensure that the light emitted by the light source array can be fully scattered and absorbed in the neck of the measured user, thereby improving the monitoring accuracy of jugular venous oxygen.

[0070] In the second aspect, after acquiring the optical signal data of the receiver array, the embodiment of the present invention also acquires the blood flow fluctuation of the measured user, and then determines the filtering range of the bandpass filter according to the blood flow fluctuation of the measured user, thereby effectively filtering out the noise information in the optical signal data, and then obtaining more accurate optical signal data, and on this basis, calculating the jugular vein blood oxygen content based on the aforementioned more accurate optical signal data. Based on the solution of the embodiment of the present invention, the influence of the blood flow fluctuation of the measured user on the jugular vein blood oxygen monitoring can be effectively reduced, thereby improving the accuracy of jugular vein blood oxygen monitoring.

[0071] In summary, the embodiment of the present invention proposes a new non-invasive jugular venous oxygen monitoring solution. Based on the solution of the embodiment of the present invention, the monitoring accuracy can be effectively improved while ensuring simplicity.

[0072] In a possible implementation, the circumference information includes the neck circumference of the measured user. Determining the first distance according to the circumference information includes:

[0073] Determine the neck circumference range to which the measured user's neck circumference belongs.

[0074] The first distance is determined based on a correspondence between a pre-calibrated neck circumference range and the first distance.

[0075] In this embodiment, considering that a neck circumference that is too large or too small will affect the propagation of near-infrared light in the neck of the measured user, the embodiment of the present invention can pre-set multiple neck circumference ranges, calibrate a first distance for each neck circumference range, and on this basis, after determining the neck circumference of the measured user, the neck circumference range corresponding to the neck circumference of the measured user can be determined, and the first distance corresponding to the neck circumference range is determined as the first distance corresponding to the neck circumference of the measured user. For example, the neck circumference ranges s1 to s2, s2 to s3, and s3 to s4 are pre-set, the first distance corresponding to the neck circumference range s1 to s2 is d1, the first distance corresponding to the neck circumference range s2 to s3 is d2, and the first distance corresponding to the neck circumference range s3 to s4 is d3. On this basis, the neck circumference of the measured user is ss, and ss belongs to the neck circumference range s2 to s3, then the first distance is d2.

[0076] In a possible implementation, the jugular venous blood oxygen monitoring method further includes: calibrating a correspondence between a neck circumference range and a first distance.

[0077] Among them, the corresponding relationship between the calibrated neck circumference range and the first distance can be described in detail as follows:

[0078] To set multiple neck circumference ranges, perform the following steps for any set neck circumference range:

[0079] The first jugular vein blood oxygen content of the target user is obtained. The target user is a user who meets the neck circumference range and has undergone invasive jugular vein blood oxygen testing. The first jugular vein blood oxygen content is the jugular vein blood oxygen content measured when the target user undergoes invasive jugular vein blood oxygen testing.

[0080] The distance between the light source array and the receiver array is adjusted to different distances. After each distance adjustment, the jugular vein blood oxygen sensor after the distance adjustment performs neck detection on the target user, and the jugular vein blood oxygen content of the target user is calculated according to the neck detection result to obtain a second jugular vein blood oxygen content.

[0081] The difference between the first jugular vein blood oxygen content and each second jugular vein blood oxygen content is calculated, and the distance corresponding to the second jugular vein blood oxygen content having the smallest difference with the first jugular vein blood oxygen content is determined as the first distance corresponding to the neck circumference range.

[0082] In this embodiment, each time the distance between the light source array and the receiver array is adjusted, the neck of the target user is detected based on the jugular vein blood oxygen sensor after the distance adjustment, and the second jugular vein blood oxygen content is calculated. Therefore, multiple distance adjustments can be performed to obtain multiple second jugular vein blood oxygen contents, and each distance adjustment corresponds to a second jugular vein blood oxygen content.

[0083] In this embodiment, the jugular venous oxygen content obtained by invasive detection is a more accurate jugular venous oxygen content, which can be used as a criterion for judging the monitoring accuracy of the embodiment of the present invention, that is, the jugular venous oxygen sensor provided by the embodiment of the present invention can be used to detect the neck of the target user, and the jugular venous oxygen content of the target user can be calculated based on the neck detection result combined with the Lambert-Beer law, that is, the second jugular venous oxygen content. On this basis, the difference between the first jugular venous oxygen content and each second jugular venous oxygen content is calculated. The larger the difference, the more inappropriate the distance between the current light source array and the receiver array; the smaller the difference, the more appropriate the distance between the current light source array and the receiver array. Therefore, the distance corresponding to the second jugular venous oxygen content with the smallest difference can be selected as the first distance corresponding to the current neck circumference range.

[0084] In one possible implementation, Figure 4 As shown, the jugular vein blood oxygen sensor also includes a bendable fixing device, and the light source array and the receiver array are arranged on the fixing device. Figure 4 In the embodiment, the module consisting of the light source array and the receiver array is clamped on the fixing device. The other side of the aforementioned module can be referred to Figure 5 , Figure 5 Each light source and each light source receiver can be snapped into the hole of the fixing device, wherein the specific shapes of the light source, the light source receiver, and the hole can be defined according to actual needs. In the embodiment of the present invention, Figure 4 and Figure 5It is only for illustration and not for limitation of shape. When the jugular vein blood oxygen sensor performs neck detection, the fixing device is close to the neck of the user being measured. At this time, each light source in the light source array will emit near-infrared light. After the near-infrared light is absorbed and scattered by the neck of the user being measured, the scattered near-infrared light will be received by the receiver in the receiver array. On this basis, the jugular vein blood oxygen content of the user being measured can be calculated according to the near-infrared light received by the receiver. Specifically, the absorption of near-infrared light by the neck of the user being measured can be judged according to the near-infrared light received by the receiver, and the jugular vein blood oxygen content of the user being measured can be judged according to the absorption. Among them, the circumference information of the user being measured includes the neck circumference of the user being measured, the length of the neck of the user being measured in the left-right direction, and the length of the neck of the user being measured in the front-back direction.

[0085] Based on the above description, before adjusting the distance between the light source array and the receiver array to the first distance, the jugular vein blood oxygen monitoring method further includes:

[0086] like Figure 6 As shown, the cross section of the neck of the user being measured is equivalent to an ellipse, and according to the neck circumference of the user being measured (i.e. Figure 6 The circumference of the ellipse), the length of the neck of the user being measured in the left and right directions (i.e. Figure 6 The length between the midline segments b1 and b2), the length of the neck of the user being measured in the front-to-back direction (i.e. Figure 6 The length between a1a2 in the figure determines the conic section formula of the ellipse.

[0087] The arc length corresponding to the first distance L is determined based on the conic section formula, and the first distance is updated to the arc length. The first distance L described in the embodiment of the present invention is the straight-line distance between AB, and the arc length described in the embodiment of the present invention is the arc length corresponding to A-b2-B.

[0088] In this embodiment, it is assumed that the first distance calculated according to the neck circumference of the measured user is L, that is, the distance between the light source array and the receiver array in the jugular venous blood oxygen sensor is L. Since the neck of the measured user has a certain curvature, when the jugular venous blood oxygen sensor is close to the neck of the measured user, the distance between the light source array and the receiver array will be less than L, resulting in an impact on the monitoring accuracy. Therefore, the neck circumference of the measured user, the length of the neck of the measured user in the left-right direction, and the length of the neck of the measured user in the front-back direction can be obtained for fitting, and the conic curve formula of the ellipse can be obtained, and then the arc length corresponding to the first distance is determined, and the first distance is updated to the aforementioned arc length. Based on this, after adjusting the distance between the light source array and the receiver array to the aforementioned arc length, since the neck of the measured user has a certain curvature, when the jugular venous blood oxygen sensor is close to the neck of the measured user, the distance between the light source array and the receiver array is exactly the first distance.

[0089] In this embodiment, according to the neck circumference (i.e. Figure 6 The circumference of the ellipse), the length of the neck of the user being measured in the left and right directions (i.e. Figure 6 The length between the midline segments b1 and b2), the length of the neck of the user being measured in the front-to-back direction (i.e. Figure 6 The conic section formula for calculating the ellipse (the length between a1a2 in the figure) can be implemented using existing mathematical methods, which will not be described in detail in this embodiment.

[0090] In this embodiment, by equivalent the neck cross-section, the embodiment of the present invention updates the adjustment distance between the light source array and the receiver array, thereby ensuring that when the jugular vein blood oxygen sensor performs neck detection, the actual distance between the light source array and the receiver array can be consistent with expectations, thereby effectively improving the monitoring accuracy.

[0091] In a possible implementation, after obtaining the jugular venous blood oxygen content of the measured user, the jugular venous blood oxygen monitoring method further includes:

[0092] The ambient brightness and light source brightness when the jugular vein blood oxygen sensor performs detection are obtained, and a correction coefficient of the jugular vein blood oxygen content is calculated based on the ambient brightness and light source brightness.

[0093] The obtained jugular venous blood oxygen content was corrected based on the correction factor.

[0094] In this embodiment, the inventors of the present application discovered that the accuracy of jugular venous blood oxygen content monitoring under different ambient brightness is different, because the relative size of the ambient brightness and the light source brightness will affect the propagation and detection of near-infrared light to a certain extent. Therefore, the embodiment of the present invention uses ambient brightness and light source brightness as influencing factors of the jugular venous blood oxygen content monitoring accuracy, and determines the correction coefficient based on the influencing factors to achieve the correction of the initial jugular venous blood oxygen content, so as to eliminate the influence of the influencing factors on the jugular venous blood oxygen content monitoring as much as possible.

[0095] In this embodiment, the correction coefficient is in the range of 0.7 to 1.3. The correction of the jugular venous blood oxygen content based on the correction coefficient can be described in detail as follows:

[0096] The final jugular venous oxygen content was determined by multiplying the correction factor by the jugular venous oxygen content.

[0097] In a possible implementation, the correction coefficient of the jugular venous blood oxygen content is calculated based on the ambient brightness and the light source brightness, including:

[0098] The ambient brightness and light source brightness were input into the pre-trained deep learning model to obtain the correction coefficient of the jugular venous blood oxygen content.

[0099] In this embodiment, a deep learning model can be pre-trained to learn the intrinsic relationship between the ambient brightness, the light source brightness, and the correction coefficient. On this basis, the ambient brightness and the light source brightness can be input into the pre-trained deep learning model to obtain the correction coefficient of the jugular vein blood oxygen content. The aforementioned deep learning model is constructed based on the principle of deep learning, which is not described in detail in this embodiment.

[0100] In this embodiment, the ambient brightness and the light source brightness are input into a pre-trained deep learning model to obtain a correction coefficient for the jugular venous blood oxygen content, which can be described in detail as follows:

[0101] The ratio of ambient brightness to light source brightness is taken as a feature vector. On this basis, the aforementioned feature vector is input into a pre-trained deep learning model to obtain the correction coefficient of jugular venous blood oxygen content.

[0102] In a possible implementation, the jugular vein blood oxygen monitoring method further includes: training a deep learning model. Training a deep learning model can be described in detail as follows:

[0103] The first jugular vein blood oxygen content of the target user is obtained. The target user is a user who meets the neck circumference range and has undergone invasive jugular vein blood oxygen testing. The first jugular vein blood oxygen content is the jugular vein blood oxygen content measured when the target user undergoes invasive jugular vein blood oxygen testing.

[0104] The target user is taken as the measured user, and the neck of the target user is detected based on the jugular vein blood oxygen sensor to obtain the jugular vein blood oxygen content corresponding to the target user (that is, the target user is taken as the measured user, and the aforementioned steps S101 to S103 are executed to obtain the jugular vein blood oxygen content corresponding to the target user).

[0105] A theoretical correction factor is determined based on the ratio of the first jugular vein blood oxygen content to the jugular vein blood oxygen content.

[0106] Obtain the ambient brightness and light source brightness when the neck of the target user is detected based on the jugular vein blood oxygen sensor.

[0107] The ambient brightness, light source brightness and theoretical correction coefficient when detecting the neck of the target user are used as training sets, and a deep learning model is obtained based on the training sets.

[0108] In this embodiment, the second deep learning model is obtained based on the training set training, which can be described in detail as follows:

[0109] S1: Input the ambient brightness and light source brightness when detecting the neck of the target user into the second deep learning model to obtain the correction coefficient output by the deep learning model.

[0110] S2: Calculate the difference between the correction coefficient output by the deep learning model and the theoretical correction coefficient. If the difference is less than the preset difference, the deep learning model training is completed; if the difference is not less than the preset difference, update the weight coefficient in the deep learning model and return to execute step S1.

[0111] Based on this, the training of deep learning models can be achieved.

[0112] Please refer to Figure 7 In another aspect of the present invention, a jugular vein blood oxygen monitoring terminal 300 is provided, comprising: one or more processors 301, one or more input devices 302, one or more output devices 303 and one or more memories 304. The processor 301, input device 302, output device 303 and memory 304 communicate with each other through a communication bus 305. The memory 304 is used to store a computer program, and the computer program includes program instructions. The processor 301 is used to execute the program instructions stored in the memory 304. Among them, the processor 301 is configured to call the program instructions to execute the steps of the above-mentioned method embodiments. It should be understood that in the embodiment of the present invention, the processor 301 may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general processor may be a microprocessor or the processor may be any conventional processor, etc. The input device 302 may include a touch panel, a fingerprint sensor (for collecting the user's fingerprint information and the direction information of the fingerprint), a microphone, etc., and the output device 303 may include a display (LCD, etc.), a speaker, etc. The memory 304 may include a read-only memory and a random access memory, and provide instructions and data to the processor 301. A portion of the memory 304 may also include a non-volatile random access memory. For example, the memory 304 may also store information about the device type. In a specific implementation, the processor 301, the input device 302, and the output device 303 described in the embodiment of the present invention may execute the implementation described in the first embodiment and the second embodiment of the jugular vein blood oxygen monitoring method provided in the embodiment of the present invention.

[0113] In another aspect of the present invention, a jugular venous blood oxygen monitoring system is provided, comprising: a jugular venous blood oxygen sensor and the jugular venous blood oxygen monitoring terminal as described above which is electrically connected to the jugular venous blood oxygen sensor.

[0114] The jugular vein blood oxygen sensor comprises a fixture and a light source array and a receiver array arranged in parallel on the fixture, and the distance between the light source array and the receiver array is adjustable. The light source array comprises a plurality of near-infrared light sources arranged in sequence, and the receiver array comprises a plurality of light source receivers arranged in sequence, and the near-infrared light sources and the light source receivers correspond to each other one by one.

[0115] When the jugular vein blood oxygen sensor performs neck detection, the fixing device is close to the neck of the user being measured, the array direction of the light source array and the receiver array is consistent with the direction of the neck of the user being measured, and the near-infrared light source on the fixing device emits near-infrared light. After the near-infrared light is scattered on the neck of the user being measured, the light source receiver on the fixing device receives the scattered near-infrared light signal, and the near-infrared light signal is used to calculate the jugular vein blood oxygen content of the user being measured.

[0116] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A jugular vein blood oxygen monitoring method, characterized in that: The jugular venous oxygen monitoring method is implemented based on a jugular venous oxygen sensor arranged on the neck of the user being measured; the jugular venous oxygen sensor comprises a light source array and a receiver array arranged in parallel, and the distance between the light source array and the receiver array is adjustable; when the jugular venous oxygen sensor performs neck detection, the array direction of the light source array and the receiver array is consistent with the neck direction of the user being measured; The jugular vein blood oxygen monitoring method comprises: Acquire the circumference information of the neck of the measured user, determine the first distance according to the circumference information, and adjust the distance between the light source array and the receiver array to the first distance; Controlling the jugular vein blood oxygen sensor to detect the neck of the user being tested, and obtaining optical signal data of the receiver array; Acquire blood flow fluctuation information of the measured user, and determine a filter frequency band of a preset bandpass filter according to the blood flow fluctuation information; filter the optical signal data based on the bandpass filter with the determined filter frequency band; Processing the filtered optical signal data based on the Lambert-Beer law to obtain the jugular venous blood oxygen content of the measured user; The circumference information includes the neck circumference of the measured user; and determining the first distance according to the circumference information includes: Determine the neck circumference range to which the measured user's neck circumference belongs; Determining the first distance based on a correspondence between a pre-calibrated neck circumference range and the first distance; The jugular vein blood oxygen monitoring method further comprises: To set multiple neck circumference ranges, perform the following steps for any set neck circumference range: Obtaining a first jugular venous blood oxygen content of a target user; the target user is a user who meets the neck circumference range and has undergone invasive jugular venous blood oxygen testing, and the first jugular venous blood oxygen content is a jugular venous blood oxygen content measured when the target user undergoes invasive jugular venous blood oxygen testing; The distance between the light source array and the receiver array is adjusted to different distances; and after each distance adjustment, the jugular vein blood oxygen sensor after the distance adjustment is used to detect the neck of the target user, and the jugular vein blood oxygen content of the target user is calculated according to the neck detection result to obtain a second jugular vein blood oxygen content; The difference between the first jugular venous oxygen content and each second jugular venous oxygen content is calculated, and the distance corresponding to the second jugular venous oxygen content having the smallest difference with the first jugular venous oxygen content is determined as the first distance corresponding to the neck circumference range; the jugular venous oxygen sensor further comprises a bendable fixture, on which the light source array and the receiver array are arranged; when the jugular venous oxygen sensor performs neck detection, the fixture is closely attached to the neck of the measured user; the circumference information comprises the neck circumference of the measured user, the length of the measured user's neck in the left-right direction, and the length of the measured user's neck in the front-back direction; Before adjusting the distance between the light source array and the receiver array to a first distance, the jugular vein blood oxygen monitoring method further includes: The cross section of the neck of the user being measured is equivalent to an ellipse, and the conic section formula of the ellipse is determined according to the neck circumference of the user being measured, the length of the neck of the user being measured in the left-right direction, and the length of the neck of the user being measured in the front-back direction; An arc length corresponding to the first distance is determined based on the conic section formula, and the first distance is updated to the arc length.

2. The jugular vein blood oxygen monitoring method according to claim 1, characterized in that: After obtaining the jugular venous blood oxygen content of the measured user, the jugular venous blood oxygen monitoring method further includes: Acquiring the ambient brightness and the light source brightness when the jugular vein blood oxygen sensor performs detection, and calculating the correction coefficient of the jugular vein blood oxygen content based on the ambient brightness and the light source brightness; The obtained jugular venous blood oxygen content is corrected based on the correction factor.

3. The jugular vein blood oxygen monitoring method according to claim 2, characterized in that: The correction coefficient of the jugular venous blood oxygen content is calculated based on the ambient brightness and the light source brightness, including: The ambient brightness and light source brightness are input into a pre-trained deep learning model to obtain a correction coefficient for jugular vein blood oxygen content.

4. The jugular vein blood oxygen monitoring method according to claim 3, characterized in that: The jugular vein blood oxygen monitoring method further comprises: Obtaining a first jugular venous blood oxygen content of a target user; the target user is a user who meets the neck circumference range and has undergone invasive jugular venous blood oxygen testing, and the first jugular venous blood oxygen content is a jugular venous blood oxygen content measured when the target user undergoes invasive jugular venous blood oxygen testing; Taking the target user as the user to be tested, performing neck detection on the target user based on the jugular vein blood oxygen sensor and obtaining the jugular vein blood oxygen content corresponding to the target user; determining a theoretical correction factor based on a ratio of the first jugular vein blood oxygen content to the jugular vein blood oxygen content; Acquire the ambient brightness and light source brightness when the jugular vein blood oxygen sensor detects the neck of the target user; The ambient brightness and light source brightness when the neck of the target user is detected and the theoretical correction coefficient are used as a training set, and the deep learning model is obtained by training based on the training set.

5. The jugular vein blood oxygen monitoring method according to any one of claims 2 to 4, characterized in that: The step of correcting the initial jugular venous blood oxygen content based on the correction coefficient to obtain a final jugular venous blood oxygen content includes: The product of the correction factor and the initial jugular venous blood oxygen content is determined as the final jugular venous blood oxygen content.

6. A jugular vein blood oxygen monitoring terminal, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

7. A jugular vein blood oxygen monitoring system for executing the jugular vein blood oxygen monitoring method according to any one of claims 1 to 5, characterized in that: include: A jugular vein blood oxygen sensor and a jugular vein blood oxygen monitoring terminal as claimed in claim 6 which is electrically connected to the jugular vein blood oxygen sensor; The jugular vein blood oxygen sensor comprises a fixing device and a light source array and a receiver array arranged in parallel on the fixing device, wherein the distance between the light source array and the receiver array is adjustable; the light source array comprises a plurality of near-infrared light sources arranged in sequence, and the receiver array comprises a plurality of light source receivers arranged in sequence, wherein the near-infrared light sources correspond to the light source receivers one by one; When the jugular vein blood oxygen sensor performs neck detection, the fixing device is closely attached to the neck of the user being measured, the array directions of the light source array and the receiver array are consistent with the direction of the neck of the user being measured, the near-infrared light source on the fixing device emits near-infrared light, and after the near-infrared light is scattered on the neck of the user being measured, the light source receiver on the fixing device receives the scattered near-infrared light signal, and the near-infrared light signal is used to calculate the jugular vein blood oxygen content of the user being measured.

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