Blood pressure monitoring method and monitoring device

Abstract

A blood pressure monitoring method and a monitoring device, the method comprising: identifying a body state of a monitoring object; when it is identified that the body state of the monitoring object is a sleep state or a static state, collecting a physiological signal of the monitoring object through a physiological signal sensor worn by the monitoring object, the physiological signal at least including a blood oxygen signal; determining a pulse wave transmission time of the monitoring object according to the physiological signal, and monitoring a blood pressure state of the monitoring object according to the pulse wave transmission time. The blood pressure monitoring method and the monitoring device can monitor the blood pressure state of the monitoring object according to the pulse wave transmission time when the monitoring object is in the sleep state or the static state, thereby ensuring continuous monitoring and avoiding disturbing the monitoring object.

Description

Technical Field

[0001] This application relates generally to the field of medical device technology, and more specifically to a blood pressure monitoring method and monitoring device. Background Technology

[0002] Traditional non-invasive blood pressure measurement is intermittent and insufficient for monitoring nocturnal blood pressure variability, easily missing exacerbating events. Furthermore, it requires applying pressure to the cuff to block blood flow, resulting in poor comfort and potential disruption to patient rest. Many studies have shown a correlation between pulse wave transit time and systolic and diastolic blood pressure; however, when extrapolating blood pressure from pulse wave transit time, the conversion relationship between pulse wave transit time and blood pressure varies between individuals. To eliminate the influence of individual differences such as arterial compliance, calibration using traditional non-invasive blood pressure measurement devices is still necessary. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] The first aspect of this application provides a blood pressure monitoring method, the method comprising: identifying the physical state of a monitored object; when the physical state of the monitored object is identified as a sleep state or a resting state, acquiring physiological signals of the monitored object through a physiological signal sensor worn by the monitored object, the physiological signals including at least a blood oxygen signal; determining the pulse wave conduction time of the monitored object based on the physiological signals, and monitoring the blood pressure state of the monitored object based on the pulse wave conduction time.

[0005] In one embodiment, the blood pressure status includes the magnitude of blood pressure variation.

[0006] In one embodiment, monitoring the blood pressure status of the monitored object based on the pulse wave conduction time includes: continuously monitoring the blood pressure status of the monitored object, or monitoring the blood pressure status of the monitored object at preset time intervals.

[0007] In one embodiment, the length of the preset time interval is a fixed length or a variable length.

[0008] In one embodiment, when the preset time interval is of variable length, the method further includes: adjusting the length of the preset time interval according to the historical trend of the blood pressure status of the monitored object.

[0009] In one embodiment, the method further includes: if an abnormal blood pressure state is detected during the process of monitoring the blood pressure status of the monitored object based on the pulse wave conduction time, activating a non-invasive blood pressure measurement device to measure the blood pressure value of the monitored object.

[0010] In one embodiment, the method further includes: activating the non-invasive blood pressure measuring device according to a preset cycle to periodically measure the blood pressure value of the monitored object; and, during the process of monitoring the blood pressure status of the monitored object based on the pulse wave conduction time, if an abnormal blood pressure status is detected and the preset measurement time point of the non-invasive blood pressure measuring device has not been reached, activating the non-invasive blood pressure measuring device to perform an emergency measurement of the blood pressure value of the monitored object.

[0011] In one embodiment, the method further includes: activating a non-invasive blood pressure measuring device according to a preset cycle to periodically measure the blood pressure value of the monitored object, wherein when a preset measurement time point of the non-invasive blood pressure measuring device is reached, it is determined whether to activate the non-invasive blood pressure measuring device based on the blood pressure status to perform periodic measurements at the preset measurement time point.

[0012] In one embodiment, the method further includes: adjusting the control parameters of the non-invasive blood pressure measuring device according to the blood pressure status.

[0013] In one embodiment, the method of identifying the physical state of the monitored object includes at least one of the following: identifying the physical state of the monitored object based on the physiological signals and / or motion signals collected by the motion sensor worn by the monitored object; identifying the physical state of the monitored object based on signals collected by sensors installed in the bed of the monitored object; identifying the physical state of the monitored object based on signals collected by radar or image acquisition devices installed around the monitored object.

[0014] In one embodiment, the physiological signal includes at least two blood oxygenation signals, or the physiological signal includes at least one blood oxygenation signal and at least one electrocardiogram signal.

[0015] A second aspect of this application provides a blood pressure monitoring method, the method comprising: acquiring physiological signals of the monitored subject through a physiological signal sensor worn by the monitored subject, the physiological signals including at least a blood oxygen signal; determining the pulse wave conduction time of the monitored subject based on the physiological signals, and monitoring the blood pressure status of the monitored subject based on the pulse wave conduction time; determining whether a non-invasive blood pressure measuring device needs to be activated based on the blood pressure status; identifying the body state of the monitored subject when it is determined that the non-invasive blood pressure measuring device needs to be activated; and activating the non-invasive blood pressure measuring device to measure the blood pressure value of the monitored subject when the body state meets preset requirements.

[0016] In one embodiment, the physical state meets preset requirements, including: the monitored object is awake and the monitored object's posture is a preset posture.

[0017] A third aspect of this application provides a blood pressure monitoring method, the method comprising: identifying the physical state of a monitored subject; when the monitored subject's physical state is identified as a sleep state, acquiring the monitored subject's physiological signals through a physiological signal sensor worn by the monitored subject, determining the monitored subject's pulse wave conduction time based on the physiological signals, and monitoring the monitored subject's blood pressure based on the pulse wave conduction time, wherein the physiological signals include at least a blood oxygen signal; when the monitored subject's physical state is identified as an awake state, measuring the monitored subject's blood pressure value through a non-invasive blood pressure measuring device worn by the monitored subject.

[0018] A fourth aspect of this application provides a monitoring device, the monitoring device comprising: a physiological signal sensor for collecting physiological signals of a monitored object, the physiological signals including at least a blood oxygen signal; and a processor connected to the physiological signal sensor for executing the blood pressure monitoring method described above.

[0019] A fifth aspect of this application provides a monitoring device, comprising: a physiological signal sensor for collecting physiological signals of a monitored object, the physiological signals including at least a blood oxygen signal; a non-invasive blood pressure measuring device for measuring the blood pressure value of the monitored object; and a processor connected to the physiological signal sensor and the non-invasive blood pressure measuring device for executing the blood pressure monitoring method described above.

[0020] The blood pressure monitoring method and monitoring device of this application monitor the blood pressure status of the monitored subject based on the pulse wave conduction time when the monitored subject is in a sleep state or a resting state, so as to ensure continuous monitoring while avoiding disturbing the monitored subject. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic flowchart of a blood pressure monitoring method according to an embodiment of this application is shown;

[0023] Figure 2 A schematic flowchart of a blood pressure monitoring method according to another embodiment of this application is shown;

[0024] Figure 3 A schematic flowchart of a blood pressure monitoring method according to yet another embodiment of this application is shown;

[0025] Figure 4 A schematic block diagram of a monitoring device according to one embodiment of this application is shown;

[0026] Figure 5 A schematic diagram of the specific structure of a monitoring device according to an embodiment of this application is shown;

[0027] Figure 6 A schematic block diagram of a monitoring device according to another embodiment of this application is shown. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application more apparent, exemplary embodiments according to this application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. Based on the embodiments of this application described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of this application.

[0029] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0030] It should be understood that this application can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this application to those skilled in the art.

[0031] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0032] To fully understand this application, a detailed structure will be presented in the following description to illustrate the technical solution proposed in this application. Optional embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0033] Below, first refer to Figure 1 A blood pressure monitoring method according to an embodiment of this application is described. Figure 1 A schematic flowchart of a blood pressure monitoring method 100 according to an embodiment of this application is shown.

[0034] like Figure 1 As shown, the blood pressure monitoring method 100 of this application embodiment includes the following steps:

[0035] In step S110, the physical condition of the monitored object is identified;

[0036] In step S120, when the body state of the monitored object is identified as a sleep state or a resting state, the physiological signals of the monitored object are collected through the physiological signal sensor worn by the monitored object, and the physiological signals include at least blood oxygenation signals.

[0037] In step S130, the pulse wave conduction time of the monitored object is determined based on the physiological signal, and the blood pressure status of the monitored object is monitored based on the pulse wave conduction time.

[0038] This application embodiment makes an intelligent decision on whether to activate blood pressure monitoring based on pulse wave transit time according to the physical condition of the monitored subject. When the monitored subject is in a sleep state or a resting state, the blood pressure status of the monitored subject is detected according to the pulse wave transit time. On the one hand, it can continuously detect the blood pressure status to ensure the safety of the monitored subject. On the other hand, it can avoid interfering with the monitored subject by activating the non-invasive blood pressure measurement device when the monitored subject is resting.

[0039] Specifically, when identifying the physical state of a monitored object, it can be determined whether the object is in a static state (i.e., a non-moving state) or whether it is in a sleeping state. In some embodiments, it can also be determined first whether the object is in a static state, and if so, whether it is in a sleeping state.

[0040] For example, the methods for identifying the physical state of a monitored object include at least one of the following: identifying the physical state based on the physiological signals of the monitored object; identifying the physical state based on motion signals collected by motion sensors worn by the monitored object; identifying the physical state based on signals collected by sensors installed in the monitored object's bed; and identifying the physical state based on signals collected by radar or image acquisition devices installed around the monitored object.

[0041] The physiological signals monitored include electrocardiogram (ECG), blood oxygen saturation, and respiration. The time-domain or frequency-domain characteristics of these physiological signals can be used to determine whether the monitored object is at rest or asleep. In some embodiments, the physiological signals can be input into a pre-trained machine learning model to determine whether the monitored object is asleep.

[0042] Motion sensors worn by the monitored subject include gyroscopes, accelerometers, etc. For example, motion sensors and physiological sensors for detecting physiological signals can be integrated into a mobile monitoring device worn by the monitored subject. Based on the motion signals collected by the motion sensors, it is possible to determine whether the monitored subject is currently in motion or stationary.

[0043] Sensors installed in the monitored object's bed include, but are not limited to, pressure sensors. Pressure sensors can detect whether the monitored object is in the bed, thus determining whether the object is asleep or stationary. Sensors installed in the monitored object's bed may also include infrared sensors, temperature sensors, etc.

[0044] Radar positioned around a monitored object can detect information about the object using electromagnetic waves. It emits electromagnetic waves and receives the echoes to obtain information such as the object's distance, orientation, speed, and amplitude, thereby determining whether the object is stationary. For example, the radar can include a non-contact medical monitoring radar. Besides determining whether the object is stationary, the radar can also extract and separate physiological information from the echoes because human breathing and heartbeat cause the chest to rise and fall rhythmically. These physiological characteristics are modulated in the reflected electromagnetic waves. An image acquisition device can continuously acquire images within a target area at a certain frequency. By recognizing the images, it can determine whether the object is stationary; by recognizing facial expressions in the images, it can also determine whether the object is asleep.

[0045] When the monitored subject is detected to be asleep or at rest, blood pressure monitoring is performed based on pulse wave transit time. Specifically, physiological signals are collected by a physiological signal sensor worn by the monitored subject. The pulse wave transit time is determined based on these signals, and the subject's blood pressure is then monitored accordingly. Conversely, because movement significantly affects pulse wave transit time, blood pressure monitoring based on pulse wave transit time is stopped if the monitored subject is detected to be in motion, in order to reduce false alarms.

[0046] Pulse wave conduction time is the time it takes for a pulse wave to travel between two points in the human body. To obtain pulse wave conduction time, at least two physiological signals from the monitored object need to be acquired. In this embodiment, the at least two physiological signals can be at least two blood oxygenation signals. The blood oxygenation signal is a photoelectric signal acquired by a blood oxygenation sensor. Specifically, the blood oxygenation sensor radiates light of different wavelengths onto the tissue region of the monitored object and detects the light signals transmitted / reflected through the tissue region. With each heartbeat, the contraction and expansion of blood vessels affect the transmission or reflection of light; therefore, the photoelectric signal can reflect the characteristics of blood flow. The pulse wave signal generated by light absorption in the tissue region can be extracted from the photoelectric signal. Processing the pulse wave signal allows for the extraction of the pulse wave waveform. Comparing the pulse wave waveforms obtained from the two blood oxygenation signals yields the pulse wave conduction time between the measurement locations of the two blood oxygenation signals.

[0047] The at least two physiological signals in this embodiment may also include at least one blood oxygenation signal and at least one electrocardiogram (ECG) signal. The ECG signal is a signal collected by an ECG sensor. The peak value of the ECG signal comes from the contraction of the ventricles, while the peak value of the pulse wave signal comes from the contraction of blood vessels. Therefore, based on the ECG signal and the pulse wave signal, the transmission time of blood from the heart to the blood oxygenation signal measurement location, i.e., the pulse wave conduction time, can be obtained.

[0048] The linear relationship between pulse wave transit time and blood pressure is relatively stable over short periods, but it is not constant over long periods. Therefore, the accuracy of absolute blood pressure estimates based on pulse wave transit time is limited. This application's embodiments monitor the blood pressure status of a subject based on pulse wave transit time; that is, they monitor the relative blood pressure status of the subject based on pulse wave transit time to determine whether the subject's blood pressure status has fluctuated excessively, without needing to output the absolute blood pressure value. Specifically, blood pressure status includes the amplitude of blood pressure changes. If the blood pressure fluctuates excessively within a short period, the subject's blood pressure status is determined to be abnormal.

[0049] In one embodiment, when monitoring the blood pressure status of a subject based on pulse wave transit time, the blood pressure status can be continuously monitored; that is, a blood pressure status assessment is performed after each blood pressure value is obtained, thereby avoiding the omission of deteriorating events. In another embodiment, when monitoring the blood pressure status of a subject based on pulse wave transit time, the blood pressure status can be monitored at preset time intervals to avoid consuming excessive computing resources.

[0050] The preset time interval can be a fixed length, such as assessing blood pressure every ten minutes. Alternatively, the preset time interval can be a variable length, meaning the frequency of blood pressure monitoring can be adaptively adjusted. In one embodiment, when the preset time interval is variable, its length can be adjusted based on the historical trend of the monitored subject's blood pressure. If the fluctuation in the monitored subject's blood pressure increases, the preset time interval is shortened, and the monitoring frequency is increased to ensure the subject's safety. Conversely, if the monitored subject's blood pressure remains stable, the preset time interval can be appropriately increased.

[0051] In one embodiment, during the monitoring of a subject's blood pressure status based on pulse wave transit time, if an abnormal blood pressure state is detected, a non-invasive blood pressure measurement device (NIBP) can be activated to measure the subject's blood pressure value. The NIBP consists of an inflatable and deflateable cuff strapped to a limb, such as the upper arm; inflation raises the cuff pressure above the systolic pressure, followed by gradual deflation in increments, creating a stable pressure state for a specific duration after each deflation. At each stable pressure state, a pressure sensor detects the pressure and pressure fluctuations caused by the body's pulse, i.e., oscillation waves. Generally, at each pressure state, after detecting two consecutive normal oscillation waves, or after the longest duration of the pressure state reaches a set threshold, the cuff is deflated to allow the cuff to enter the next stable pressure state. For any given stable pressure state, the amplitude of the oscillation wave at that state can be calculated; by analyzing the amplitude values ​​of the oscillation waves at each stable pressure state, the body's blood pressure value can be obtained. Non-invasive blood pressure measurement devices have high accuracy. When an abnormal blood pressure status is detected, activating the non-invasive blood pressure measurement device can further determine whether the blood pressure status of the monitored subject is indeed abnormal, and provide specific blood pressure values ​​for the monitored subject or medical staff to refer to.

[0052] In one embodiment, the non-invasive blood pressure measuring device can also be activated according to a preset cycle to periodically measure the blood pressure value of the monitored subject. Exemplarily, the blood pressure value measured by the non-invasive blood pressure measuring device can also be used to calibrate the linear relationship between pulse wave transit time and blood pressure.

[0053] Furthermore, if the non-invasive blood pressure measurement device is activated according to a preset cycle to periodically measure the blood pressure of the monitored subject, then at the preset measurement time point, the system can determine whether to activate the non-invasive blood pressure measurement device and perform the periodic measurement at the preset time point based on the blood pressure status obtained based on the pulse wave transit time, thereby reducing disturbance to the monitored subject. For example, if the blood pressure status obtained based on the pulse wave transit time is abnormal or close to abnormal, the non-invasive blood pressure measurement device is activated to perform the periodic measurement at the preset time point; if the blood pressure status obtained based on the pulse wave transit time is normal and the safety level is high, the non-invasive blood pressure measurement device is not activated.

[0054] Furthermore, if the non-invasive blood pressure measurement device is activated according to the preset cycle, during the process of monitoring the blood pressure status of the monitored subject based on the pulse wave conduction time, if an abnormal blood pressure status is detected and the preset measurement time point of the non-invasive blood pressure measurement device has not been reached, the non-invasive blood pressure measurement device will be activated to perform an emergency measurement of the monitored subject's blood pressure value, thereby further confirming the monitored subject's blood pressure status and providing accurate blood pressure values ​​for medical staff to use as a reference.

[0055] In one embodiment, the control parameters of the non-invasive blood pressure measuring device can also be adjusted according to the blood pressure status, such as the target inflation pressure and the time interval for non-invasive blood pressure measurement, thereby improving the accuracy of non-invasive blood pressure measurement.

[0056] The blood pressure monitoring method 100 of this application monitors the blood pressure status of the monitored subject based on the pulse wave conduction time when the monitored subject is in a sleep state or a resting state, so as to ensure continuous monitoring while avoiding disturbing the monitored subject.

[0057] This application also provides a blood pressure monitoring method, see [link to relevant documentation] Figure 2 The blood pressure monitoring method 200 includes the following steps:

[0058] In step S210, physiological signals of the monitored object are collected by a physiological signal sensor worn by the monitored object, and the physiological signals include at least blood oxygenation signals;

[0059] In step S210, the pulse wave conduction time of the monitored object is determined based on the physiological signal, and the blood pressure status of the monitored object is monitored based on the pulse wave conduction time;

[0060] In step S220, it is determined whether the non-invasive blood pressure measurement device needs to be activated based on the blood pressure status;

[0061] In step S230, when it is determined that the non-invasive blood pressure measurement device needs to be activated, the physical condition of the monitored object is identified;

[0062] In step S240, when the physical condition meets the preset requirements, the non-invasive blood pressure measurement device is activated to measure the blood pressure value of the monitored subject.

[0063] In this embodiment, the blood pressure monitoring method 200 monitors the blood pressure status of the monitored subject based on the pulse wave transit time under normal conditions. When the blood pressure status becomes abnormal and the monitored subject's physical condition meets preset requirements, the non-invasive blood pressure measurement device is activated to measure the blood pressure value of the monitored subject.

[0064] In one embodiment, the monitored subject's physical condition meeting preset requirements includes: the monitored subject being awake and in a preset posture. The preset posture can be a standard posture for non-invasive blood pressure measurement, such as keeping the arm at heart level. In this embodiment, the non-invasive blood pressure measurement device is activated only when the monitored subject is awake and maintaining the preset posture. If the monitored subject is asleep or in a posture that does not conform to the preset posture, the non-invasive blood pressure measurement device will not be activated. This ensures the accuracy of the measurement results, and the monitored subject maintaining the preset posture indicates that they are ready for blood pressure measurement, thus avoiding disturbing the monitored subject's rest.

[0065] In one embodiment, the posture of the monitored object can be identified based on motion signals collected by motion sensors worn by the object. Exemplarily, the motion sensors include a first motion sensor worn on the arm of the monitored object and a second motion sensor worn on the torso. Based on the first and second motion signals, the absolute angle and acceleration of the monitored object can be obtained, thus determining the object's motion state, such as walking, running, or remaining stationary. Comparing the relative angles of the first and second motion sensors reveals the object's posture, such as whether the object maintains arm height at heart level.

[0066] According to the blood pressure monitoring method 200 of this application embodiment, the blood pressure status of the monitored object is monitored based on the pulse wave conduction time under normal conditions. When the blood pressure status indicates that the non-invasive blood pressure measuring device needs to be activated and the physical condition of the monitored object meets the preset requirements, the non-invasive blood pressure measuring device is activated to measure the blood pressure value of the monitored object. This ensures that the non-invasive blood pressure measuring device is activated when needed and when the monitored object is ready, which can guarantee the safety of the monitored object and reduce disturbance to the monitored object.

[0067] This application also provides a blood pressure monitoring method, see [link to relevant documentation] Figure 3 The blood pressure monitoring method 300 includes the following steps:

[0068] In step S310, the physical condition of the monitored object is identified;

[0069] In step S320, when the body state of the monitored object is identified as a sleep state, the physiological signals of the monitored object are collected by the physiological signal sensor worn by the monitored object, the pulse wave conduction time of the monitored object is determined based on the physiological signals, and the blood pressure of the monitored object is monitored based on the pulse wave conduction time, wherein the physiological signals include at least blood oxygen signals;

[0070] In step S330, when the monitored subject is identified as being awake, the blood pressure of the monitored subject is measured using a non-invasive blood pressure measuring device worn by the monitored subject.

[0071] According to the blood pressure monitoring method 300 of this application embodiment, when the monitored object is in a sleep state, the blood pressure status is monitored based on the pulse wave conduction time; when the monitored object is awake, the blood pressure value is measured by a non-invasive blood pressure measuring device, which can avoid interference during the monitored object's sleep and at the same time ensure continuous monitoring of the monitored object.

[0072] Below, please refer to the appendix. Figure 4 A monitoring device 400 according to one embodiment of this application will be described. For example... Figure 4 As shown, the monitoring device 400 includes a physiological signal sensor 410 and a processor 420. The physiological signal sensor 410 is used to collect physiological signals of the monitored subject. The physiological signal sensor 410 includes at least a blood oxygen sensor for collecting blood oxygen signals. In one embodiment, the physiological signal sensor 410 includes at least two blood oxygen sensors to collect at least two blood oxygen signals. In another embodiment, the physiological signal sensor 410 includes at least one blood oxygen sensor and at least one electrocardiogram (ECG) sensor, respectively used to collect at least one blood oxygen signal and at least one ECG signal. The physiological sensor 410 may also include sensors for collecting other physiological signals, such as a body temperature sensor, a respiration sensor, etc.

[0073] The processor 420 is connected to the physiological signal sensor 410 and is used to execute the blood pressure monitoring method 100 described above, that is, to calculate the pulse wave transit time based on the physiological signals collected by the physiological signal sensor 410, and to monitor the blood pressure status of the monitored object based on the pulse wave transit time. The processor 420 may include one or more embedded processors, processor cores, microprocessors, logic circuits, hardware finite state machines (FSMs), digital signal processors (DSPs), image processing units (GPUs), or combinations thereof. The processor 420 can be used to execute program instructions stored in memory, causing the processor 420 to execute the blood pressure monitoring method 100.

[0074] The monitoring device 400 can be implemented as a mobile monitoring device, which is a monitoring device capable of monitoring the monitored object while it is in motion. The mobile monitoring device is a wearable mobile monitoring device worn on the body of the monitored object. The mobile monitoring device can also communicate with bedside monitoring equipment such as monitors or central monitoring systems to transmit the status of the monitored object to the bedside monitoring equipment or central monitoring system for display.

[0075] Figure 5 A mobile monitoring device is shown, such as Figure 5 As shown, the physiological signal sensor 410 includes a blood oxygen sensor 510 worn on the finger of the monitored subject and an electrocardiogram (ECG) sensor 520 worn on the torso of the monitored subject. A mobile monitoring device host, equipped with a processor 420, is worn on the wrist of the monitored subject. The blood oxygen sensor 510 and the ECG sensor 520 send blood oxygen signals and ECG signals to the processor 420 in the host, respectively, for monitoring of blood pressure. In some embodiments, the mobile monitoring device further includes a non-invasive blood pressure measurement device 530, specifically a cuff-type non-invasive blood pressure measurement device worn on the arm of the monitored subject.

[0076] In some embodiments, the monitoring device further includes a motion sensor, which may include a first sensor in the host computer disposed at the wrist of the monitored object. Exemplarily, the motion sensor may also include a second sensor disposed at the torso of the monitored object. The motion sensor is communicatively connected to a processor in the host computer and sends the collected motion signals to the processor, which identifies the motion state of the monitored object based on the motion signals.

[0077] The monitoring device 400 in this embodiment is used to implement the blood pressure monitoring method 100, and thus can avoid disturbing the monitored object while ensuring continuous monitoring.

[0078] Below, please refer to the appendix. Figure 6 A monitoring device 600 according to another embodiment of this application will be described. For example... Figure 6As shown, the monitoring device 600 includes a physiological signal sensor 610, a non-invasive blood pressure measuring device 620, and a processor 630. The physiological signal sensor 610 is used to collect physiological signals from the monitored subject. The physiological signal sensor 610 includes at least a blood oxygen sensor for collecting blood oxygen signals. In one embodiment, the physiological signal sensor 610 includes at least two blood oxygen sensors to collect at least two blood oxygen signals. In another embodiment, the physiological signal sensor 610 includes at least one blood oxygen sensor and at least one electrocardiogram (ECG) sensor, respectively used to collect at least one blood oxygen signal and at least one ECG signal. The non-invasive blood pressure measuring device 620 is used to measure the blood pressure value of the monitored subject. Specifically, the non-invasive blood pressure measuring device 620 can be a cuff-type non-invasive blood pressure measuring device. Its principle is to use a cuff to block arterial blood flow by inflating it. Then, during deflation, as the cuff pressure decreases, the pulsation of the arterial blood vessel wall will generate oscillation waves in the gas inside the cuff. The blood pressure value can be obtained by analyzing the oscillation waves.

[0079] The processor 630 is connected to the physiological signal sensor 610 and the non-invasive blood pressure measuring device 620, and is used to execute the blood pressure monitoring method 200 or blood pressure monitoring method 300 described above. It decides whether to monitor blood pressure based on the physiological signals collected by the physiological signal sensor 610 or to activate the non-invasive blood pressure measuring device 620 to measure blood pressure based on the physical condition of the monitored subject.

[0080] The monitoring device 600 of this application embodiment is used to implement the blood pressure monitoring method 200 or the blood pressure monitoring method 300, and thus can reduce the disturbance to the monitored object while ensuring continuous monitoring.

[0081] In addition, embodiments of this application also provide a computer storage medium on which a computer program is stored. One or more computer program instructions may be stored on the computer-readable storage medium, and a processor may execute the program instructions stored in the storage device to implement the functions (implemented by the processor) in the embodiments of this application and / or other desired functions, such as performing corresponding steps of the blood pressure monitoring method according to embodiments of this application. Various applications and various data may also be stored in the computer-readable storage medium, such as various data used and / or generated by the applications.

[0082] For example, computer storage media may include a memory card for a smartphone, a storage component for a tablet computer, a hard disk for a personal computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disc read-only memory (CD-ROM), a USB memory, or any combination of the above storage media.

[0083] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0084] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0085] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0086] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0087] Similarly, it should be understood that, in order to streamline this application and aid in understanding one or more of the various inventive aspects, features of this application may sometimes be grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of this application. However, this approach should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, its inventive point lies in solving the corresponding technical problem with features fewer than all features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0088] Those skilled in the art will understand that, apart from the mutual exclusion of features, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or elements of any method or apparatus so disclosed can be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature serving the same, equivalent, or similar purpose.

[0089] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0090] The various component embodiments of this application can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some modules according to the embodiments of this application. This application can also be implemented as an apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such an implementation of this application can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0091] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A method for monitoring blood pressure, characterized in that, The method includes: Identify the physical condition of the monitored subjects; When the monitored object's physical state is detected as sleep, physiological signals of the monitored object are collected through physiological signal sensors worn by the monitored object, and the physiological signals include at least blood oxygenation signals; The pulse wave conduction time of the monitored object is determined based on the physiological signal, and the blood pressure status of the monitored object is monitored based on the pulse wave conduction time. When the monitored subject is in a sleep state, the non-invasive blood pressure measuring device is activated according to a preset cycle to measure the blood pressure value of the monitored subject periodically. When the preset measurement time point of the non-invasive blood pressure measuring device is reached, it is determined whether to activate the non-invasive blood pressure measuring device based on the blood pressure status and perform the periodic measurement at the preset measurement time point. If the blood pressure status is abnormal, the periodic measurement is performed; if the blood pressure status is normal, the periodic measurement is not performed.

2. The method as described in claim 1, characterized in that, The blood pressure status includes the range of blood pressure changes.

3. The method as described in claim 1, characterized in that, The monitoring of the blood pressure status of the monitored object based on the pulse wave transit time includes: The blood pressure status of the monitored subject is continuously monitored, or the blood pressure status of the monitored subject is monitored at preset time intervals.

4. The method as described in claim 3, characterized in that, The preset time interval can be a fixed length or a variable length.

5. The method as described in claim 4, characterized in that, When the preset time interval is of variable length, the method further includes: adjusting the length of the preset time interval according to the historical trend of the blood pressure status of the monitored object.

6. The method as described in claim 1, characterized in that, Also includes: During the monitoring of the blood pressure status of the monitored subject based on the pulse wave conduction time, if an abnormal blood pressure status is detected, the non-invasive blood pressure measurement device is activated to measure the blood pressure value of the monitored subject.

7. The method as described in claim 1, characterized in that, Also includes: The non-invasive blood pressure measurement device is activated according to a preset cycle to periodically measure the blood pressure value of the monitored object; as well as During the monitoring of the blood pressure status of the monitored subject based on the pulse wave conduction time, if an abnormal blood pressure status is detected before the preset measurement time point of the non-invasive blood pressure measuring device is reached, the non-invasive blood pressure measuring device is activated to perform an emergency measurement of the blood pressure value of the monitored subject.

8. The method according to any one of claims 6-7, characterized in that, Also includes: The control parameters of the non-invasive blood pressure measuring device are adjusted according to the blood pressure status.

9. The method as described in claim 1, characterized in that, The methods for identifying the physical condition of the monitored object include at least one of the following: The body state of the monitored object is identified based on the physiological signals and / or motion signals collected by the motion sensor worn by the monitored object. The physical condition of the monitored object is identified based on signals collected by sensors installed in the bed of the monitored object. The physical condition of the monitored object is identified based on signals collected by radar or image acquisition devices placed around the monitored object.

10. The method as described in claim 1, characterized in that, The physiological signals include at least two blood oxygenation signals, or the physiological signals include at least one blood oxygenation signal and at least one electrocardiogram signal.

11. A monitoring device, characterized in that, The monitoring device includes: A physiological signal sensor is used to collect physiological signals of a monitored object, wherein the physiological signals include at least blood oxygenation signals; A processor, connected to the physiological signal sensor, is used to execute the blood pressure monitoring method according to any one of claims 1-10.

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