CN112135559A

CN112135559A - Optimization method for blood pressure measurement and blood pressure measurement device

Info

Publication number: CN112135559A
Application number: CN201880093577.8A
Authority: CN
Inventors: 马强; 刘三超; 任健; 何先梁; 刘启翎
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd; Shenzhen Mindray Scientific Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd; Shenzhen Mindray Scientific Co Ltd
Priority date: 2018-05-30
Filing date: 2018-05-30
Publication date: 2020-12-25
Also published as: WO2019227329A1

Abstract

A blood pressure measuring optimization method and blood pressure measuring device, obtain the heart movement information and pulse wave signal of the detected object (S110); acquiring a motion signal of a detected object by a motion sensor (20) attached to the detected object (S130); determining the motion intensity of the detected object according to the motion signal (S150); identifying a signal segment in the pulse wave signal corresponding to a time period in which the exercise intensity is greater than the first intensity threshold (S170); the pulse wave signal having consistency with the heart movement information is searched in the signal segment based on the heart movement information (S190).

Description

Optimization method for blood pressure measurement and blood pressure measurement device

Technical Field

The invention relates to an optimization method for blood pressure measurement and a blood pressure measurement device.

Background

Blood pressure measurements may generally include invasive blood pressure measurements and non-invasive blood pressure measurements. Invasive blood pressure measurement refers to the measurement of blood pressure directly by opening a blood vessel; non-invasive blood pressure measurement is a technique for indirectly measuring blood pressure, and for example, non-invasive blood pressure measurement based on oscillation method is taken as an example:

attaching an inflatable and deflatable cuff to a limb of the human body, such as the upper arm; then the cuff is inflated to make the pressure in the cuff higher than the systolic pressure, and then the cuff is gradually deflated according to a certain step length, and after each deflation, the cuff forms a stable pressure state lasting for a certain time. In each stable pressure state, the pressure sensor detects the pressure of the stable pressure state, and the pressure fluctuation, i.e., the oscillation wave, due to the pulsation of the human pulse. Generally, after two consecutive normal oscillatory waves are detected at each pressure state, or the maximum duration of the pressure state reaches a set threshold, the cuff is deflated to bring the cuff into the next stable pressure state. For any stable pressure state, calculating an amplitude value representing the oscillation wave in the pressure state according to the oscillation wave detected in the stable pressure state; by analyzing the amplitude value of the oscillation wave in each stable pressure state, the blood pressure value of the human body can be obtained.

However, the blood pressure measuring device according to the above principle is easily affected by the movement of the human body, especially the movement of the arm to which the cuff is attached, during the process of measuring the blood pressure. For example, when the arm moves, the arm presses the cuff to cause the oscillation of the pressure in the cuff, forming an interference waveform similar to the oscillation waveform state caused by pulse beat, or causing the normal oscillation waveform to be interfered to generate deformation to affect the amplitude detection.

When there is movement, the conventional blood pressure measuring apparatus generally processes: extending the longest duration of the pressure state in an attempt to obtain a normal oscillatory wave after the motion has stopped; alternatively, the amplitudes of a series of disturbed waveforms are simply averaged as the amplitude value of the oscillatory wave in that pressure state.

Such a treatment has many limitations, such as long-term compression which can cause the limb to be subjected to greater pressure, affecting measurement comfort; for a measurer with vascular disease, the probability of limb injury may also be increased; meanwhile, the measurement accuracy cannot be effectively ensured; in addition, the system is also generally only suitable for measurement monitoring of non-mobile patients and is not suitable for monitoring measurement of mobile patients.

Technical problem

In view of the limitations of the above-mentioned processing measures, the present invention mainly provides an optimization method of blood pressure measurement and a blood pressure measurement device.

Technical solution

According to a first aspect, an embodiment provides a method of optimizing blood pressure measurements, comprising:

acquiring heart motion information and pulse wave signals of a detected object;

acquiring a motion signal of the detected object through a motion sensor attached to the detected object;

determining the motion intensity of the detected object according to the motion signal;

identifying a signal segment in the pulse wave signal corresponding to a time segment of which the exercise intensity is greater than a first intensity threshold value;

and searching out a pulse wave signal which is consistent with the heart movement information in the signal section based on the heart movement information.

In one embodiment, the pulse wave signal and the motion signal of the detected object are acquired synchronously.

In one embodiment, the determining the motion intensity of the detected object according to the motion signal includes: determining a motion strength of the detected object based on the amplitude and/or frequency of the motion signal.

In an embodiment, after the signal segment in the pulse wave signal corresponding to the time period in which the exercise intensity is greater than the first intensity threshold is identified, the signal segment is marked.

In an embodiment, the cardiac motion information includes at least one of a heart rate, a pulse rate, a heart beat interval time, and a number of template waveforms within a first preset time period.

In one embodiment, the pulse wave signal having consistency with the heart motion information includes: and the pulse wave signal is consistent with at least one of the heart rate, the pulse rate, the heartbeat interval time and the template waveform quantity within a first preset time length.

In an embodiment, the heart motion information is a heartbeat interval time, and the acquiring the heart motion information of the detected object includes:

acquiring an electrocardiosignal of a detected object, and calculating the heartbeat interval time of the detected object according to the electrocardiosignal; alternatively, the first and second electrodes may be,

acquiring a pulse rate signal of a detected object, and calculating the heartbeat interval time of the detected object according to the pulse rate signal.

In one embodiment, the pulse wave signal having consistency with the heart motion information includes: pulse wave signals with pulse wave interval time consistent with the heartbeat interval time.

In one embodiment, the acquiring the pulse wave signal of the detected object includes: acquiring pulse wave signals of the detected object under different pressure states in turn, wherein the longest duration of each pressure state is determined based on the acquired heart motion information.

In an embodiment, the longest duration in each of the pressure states is determined based on a heartbeat interval time, wherein the heartbeat interval time is determined based on the cardiac motion information.

In one embodiment, the maximum duration of each of the pressure states is a preset number of times the heart beat interval time.

In one embodiment, when the longest duration of the motion intensity greater than the first intensity threshold is identified to exceed a time threshold, the search for the pulse wave signal consistent with the heart motion information in the signal segment is stopped, and/or the acquisition of the pulse wave signal of the detected object is stopped, and/or an alarm prompt message is issued.

In an embodiment, before the acquiring the pulse wave signal of the detected object, the method further includes determining whether to start the blood pressure measurement: when an instruction for starting blood pressure measurement is received, a motion signal of the detected object is pre-acquired, whether the motion intensity of the detected object is larger than a second intensity threshold value or not is judged according to the motion signal, if yes, the blood pressure measurement is started after a second preset time is delayed, and if not, the blood pressure measurement is started.

In an embodiment, after delaying the second preset time, it is determined again whether to start the blood pressure measurement, and if the exercise intensity of the detected object is still greater than the second intensity threshold, the blood pressure measurement is abandoned and/or an alarm prompt message is sent.

According to a second aspect, there is provided in an embodiment a blood pressure measurement device comprising:

the pulse wave sensing unit is used for sensing the pulse wave of the detected object and outputting a pulse wave signal;

a motion sensor sensing a motion state of the detected object by attaching to the detected object and outputting a motion signal;

the processing unit is used for obtaining the heart motion information of the detected object; determining the motion intensity of the detected object according to the motion signal; identifying a signal segment in the pulse wave signal corresponding to a time segment of which the exercise intensity is greater than a first intensity threshold value; and searching pulse wave signals consistent with the heart motion information in the signal section based on the heart motion information, and calculating a blood pressure value according to the searched pulse wave signals consistent with the heart motion information.

In an embodiment, the processing unit is further configured to control the pulse wave sensing unit and the motion sensor to work synchronously, so as to obtain the pulse wave signal and the motion signal of the detected object synchronously.

In an embodiment, the processing unit determines the intensity of the motion of the detected object based on the amplitude and/or frequency of the motion signal.

In an embodiment, after the processing unit identifies a signal segment in the pulse wave signal corresponding to a time period in which the exercise intensity is greater than the first intensity threshold, the processing unit performs a labeling process on the signal segment.

In one embodiment, the pulse wave signal having consistency with the heart motion information includes: and the pulse wave signals are consistent with at least one of the heart rate, the pulse rate, the heartbeat interval time and the template waveform quantity within a first preset time length.

In an embodiment, the blood pressure measuring device further comprises an electrocardiosignal detecting unit for detecting and outputting an electrocardiosignal of the detected object, and the processing unit calculates the heartbeat interval time according to the electrocardiosignal; or, the device further comprises a pulse rate signal detection unit for detecting and outputting a pulse rate signal of the detected object, and the processing unit calculates the heartbeat interval time according to the pulse rate signal.

In an embodiment, the blood pressure measuring device further comprises a setting unit; the pulse wave sensing unit sequentially acquires pulse wave signals of the detected object under different pressure states; the setting unit is adapted to determine a longest duration for each of the pressure states based on the acquired heart motion signals.

In an embodiment, the setting unit determines a heartbeat interval time based on the cardiac motion information, the longest duration in each of the stress states being determined based on the heartbeat interval time.

In an embodiment, when the maximum duration of the motion intensity greater than the first intensity threshold exceeds a time threshold, the processing unit stops searching the signal segment for the pulse wave signal consistent with the heart motion information, and/or stops acquiring the pulse wave signal of the detected object, and/or sends out alarm prompt information.

In an embodiment, before acquiring a pulse wave signal of a detected object, when receiving an instruction to start blood pressure measurement, the processing unit pre-acquires a motion signal of the detected object, determines whether the motion intensity of the detected object is greater than a second intensity threshold according to the motion signal, if so, delays for a second preset time period, and then determines whether to start the blood pressure measurement again, and if not, starts the blood pressure measurement.

In an embodiment, the processing unit determines whether to start the blood pressure measurement again after the time delay is delayed for a second preset time period, and if the exercise intensity of the detected object is still greater than the second intensity threshold, abandons the blood pressure measurement and/or sends out an alarm prompt message.

In an embodiment, the blood pressure measuring device further includes an alarm unit for giving an alarm according to the alarm prompt information.

In one embodiment, the blood pressure measuring device further comprises a sleeve for being sleeved on the arm or the wrist of the detected object, and a charging and discharging unit for charging and discharging air to and from the sleeve; the processing unit controls the charging and discharging unit to charge the oversleeves and then gradually discharge air according to a certain step length, and a stable pressure state lasting for a certain time is formed after each time of discharging air; and under each stable pressure state, the processing unit controls the pulse wave sensing unit to acquire the pulse wave signals under the stable pressure state.

In one embodiment, the pulse wave sensing unit is arranged in the sleeve; the motion sensor is arranged on the sleeve or is arranged on the detected object.

In an embodiment, the motion sensor comprises at least one of an acceleration sensor, an angular velocity sensor, or a gravity sensing sensor.

According to a third aspect, an embodiment provides a computer-readable storage medium, characterized by a program, which is executable by a processor to implement the method according to any of the above embodiments.

Advantageous effects

According to the optimization method of blood pressure measurement, the blood pressure measurement device and the computer readable storage medium of the embodiment, the interfered pulse wave signal segment is marked according to the motion signal, and then the pulse wave signal consistent with the heart motion information is searched in the interfered signal segment according to the heart motion information, so that the influence and interference of the motion of the detected object on the measured blood pressure value are effectively solved.

Drawings

FIG. 1 is a system block diagram of a parameter processing module in a multi-parameter monitor;

FIG. 2 is a system block diagram of a parameter processing module in a single parameter monitor;

FIG. 3 is a schematic diagram of a networked system of monitors used in a hospital;

FIG. 4 is a flow chart of an embodiment of a method for optimizing blood pressure measurements;

FIG. 5 is a flow chart of a method of optimizing blood pressure measurements according to another embodiment;

FIG. 6 is a schematic structural diagram of a blood pressure measuring device according to an embodiment;

FIG. 7 is a schematic structural view of a blood pressure measuring device according to another embodiment;

FIG. 8 is a schematic structural view of a blood pressure measuring device according to still another embodiment;

fig. 9 is a schematic structural view of a blood pressure measuring device according to still another embodiment.

Modes for carrying out the invention

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The invention improves the starting time of the blood pressure measurement, so that when the start of the blood pressure measurement is received, a proper time is selected to start the blood pressure measurement or the blood pressure measurement is abandoned. After the blood pressure measurement is started, the interfered pulse wave signal segment is marked according to the motion signal, and then the pulse wave signal consistent with the heart motion information is searched in the interfered signal segment according to the heart motion information, so that the influence and interference of the motion of the detected object on the measured blood pressure value are effectively solved, and the following specific description is provided.

The terms "first," "second," and the like in the description and claims herein and in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, or apparatus.

As shown in FIG. 1, a system architecture diagram of a parameter processing module in a multi-parameter monitor is provided. The multi-parameter monitor has a separate housing having a sensor interface area on a panel of the housing, in which a plurality of sensor interfaces are integrated for connecting with external physiological parameter sensor accessories 111, and a small-sized IXD display area, a display 119, an input interface circuit 122, and an alarm circuit 120 (e.g., an LED alarm area), etc. The parameter processing module is used for communicating with the host and getting electricity from the host, and is used for an external communication and power interface. The parameter processing module also supports an external parameter insertion module, a plug-in monitor host can be formed by inserting the parameter insertion module and is used as a part of the monitor, the plug-in monitor host can also be connected with the host through a cable, and the external parameter insertion module is used as an external accessory of the monitor.

The internal circuit of the parameter processing module is disposed in the housing, as shown in fig. 1, and includes at least two signal acquisition circuits 112 corresponding to physiological parameters, a front end signal processing circuit 113 and a main processor 115, the signal acquisition circuits 112 may be selected from an electrocardiograph circuit, a respiration circuit, a body temperature circuit, a blood oxygen circuit, a non-invasive blood pressure circuit, an invasive blood pressure circuit, and the like, the signal acquisition circuits 112 are respectively electrically connected to corresponding sensor interfaces for electrically connecting to the sensor accessories 111 corresponding to different physiological parameters, an output end of the signal acquisition circuit is coupled to the front end signal processor, a communication port of the front end signal processor is coupled to the main processor, and the main processor is electrically connected to an external communication and power interface. The various physiological parameter measuring circuits can adopt a common circuit in the prior art, a front-end signal processing circuit completes the sampling and analog-to-digital conversion of the output signal of the signal acquisition circuit and outputs a control signal to control the measuring process of the physiological signal, and the parameters include but are not limited to: electrocardio, respiration, body temperature, blood oxygen, noninvasive blood pressure and invasive blood pressure parameters. The front-end signal processor circuit can be realized by adopting a single chip microcomputer or other semiconductor devices, for example, the single chip microcomputer can be selected, and the front-end signal processor circuit can also be realized by adopting an ASIC (application specific integrated circuit) or an FPGA (field programmable gate array). The front-end signal processor circuit can also comprise an isolation power supply for supplying power, sampled data are sent to the main processor through the isolation communication interface after being simply processed and packaged, for example, the front-end signal processor circuit 113 can be coupled to the main processor 115 through the isolation power supply and the communication interface 114, the reason that the front-end signal processor is supplied with power by the isolation power supply is a DC/DC power supply isolated by a transformer, the effect of isolating a patient from power supply equipment is achieved, and the main purpose is as follows: 1. isolating the patient, and floating the application part through an isolation transformer to ensure that the leakage current of the patient is small enough; 2. the voltage or energy when defibrillation or electrotome is applied is prevented from influencing board cards and devices of intermediate circuits such as a main control board and the like (guaranteed by creepage distance and electric clearance). Of course, the front-end signal processor circuit 113 may also be connected to the main processor 115 by a cable 124. The main processor performs calculation of the physiological parameters and transmits the calculation results and waveforms of the parameters to a host (such as a host with a display, a PC, a central station, etc.) through the external communication and power interface 116, wherein the main processor 115 may also be connected to the external communication and power interface 116 through the cable 125, and the external communication and power interface 116 may be one or a combination of a local area network interface composed of Ethernet (Ethernet), a Token Ring (Token Ring), a Token Bus (Token Bus), and a backbone Fiber Distribution Data Interface (FDDI) as these three networks, one or a combination of wireless interfaces such as infrared, bluetooth, wifi, WMTS communication, etc., or one or a combination of wired data connection interfaces such as RS232, USB, etc. The external communication and power interface 116 may also be one or a combination of a wireless data transmission interface and a wired data transmission interface. The host can be any computer equipment of a host computer of a monitor, an electrocardiograph, an ultrasonic diagnostic apparatus, a computer and the like, and matched software is installed to form the monitor equipment. The host can also be communication equipment such as a mobile phone, and the parameter processing module sends data to the mobile phone supporting Bluetooth communication through the Bluetooth interface to realize remote transmission of the data. After the main processor 115 completes the calculation of the physiological parameter, it can also determine whether the physiological parameter is abnormal, and if so, it can alarm through the alarm circuit 120. In addition, the power and battery management circuitry 117 is shown for managing and processing the power to the monitor, and the memory 118 may store intermediate and final data for the monitor, as well as program instructions or code for execution by the main processor 115 or the like. If the monitor has a blood pressure measurement function, a pump valve driving circuit 121 may be further included, and the pump valve driving circuit 121 is used for performing inflation or deflation operations under the control of the main processor 115.

As shown in FIG. 2, a processing system architecture for a monitor of a single physiological parameter is provided. The same can be found in the above.

As shown in fig. 3, a networked system of monitors for use in a hospital is provided, by which data of the monitors can be integrally stored, patient information and nursing information can be centrally managed, and the patient information and the nursing information can be stored in association with each other, so that storage of historical data and associated alarm can be facilitated. In the system shown in fig. 3, a bedside monitor 212 may be provided for each patient bed, and the bedside monitor 212 may be the multi-parameter monitor or the plug-in monitor described above. In addition, each bedside monitor 212 can also be paired with one portable monitor device 213 for transmission, the portable monitor device 213 provides a simple and portable parameter processing module, the simple and portable parameter processing module can be worn on the body of a patient and is used for mobile monitoring corresponding to the patient, physiological data generated by the mobile monitoring can be transmitted to the bedside monitor 212 for display after the portable monitor device 213 is in wired or wireless communication with the bedside monitor 212, or transmitted to the central station 211 through the bedside monitor 212 for being checked by a doctor or a nurse, or transmitted to the data server 215 through the bedside monitor 212 for storage. In addition, the portable monitoring device 213 can also directly transmit the physiological data generated by the mobile monitoring to the central station 211 through the wireless network node 214 arranged in the hospital for storage and display, or transmit the physiological data generated by the mobile monitoring to the data server 215 through the wireless network node 214 arranged in the hospital for storage. It can be seen that the data corresponding to the physiological parameters displayed on the bedside monitor 212 may originate from a sensor accessory directly connected above the monitor, or from the portable monitoring device 213, or from a data server. The portable monitoring device 213 may be wired and/or wirelessly connected to the sensor accessory 111 and contain some or all of the circuitry of the parameter processing module described above, e.g., the isolation measures for isolating the patient may not be provided on the portable monitoring device 213, but rather may be provided outside the portable monitoring device 213, such as on the sensor accessory 111. The portable monitoring device 213 may have a display screen for displaying parameter calculation results and/or prompting alarm information, for example, the portable monitoring device 213 may be a wireless sensor patch attached to the body, or a transit monitor, or a telemetry device.

The invention can introduce the motion sensor on the basis of the monitor, and the monitor is optimized by the signals acquired by the motion sensor. For example, referring to fig. 4, an embodiment of the present invention discloses an optimization method for blood pressure measurement (hereinafter referred to as an optimization method), which can be applied to a fixed blood pressure measurement device or a mobile blood pressure measurement device (e.g., a wearable monitor), including steps S110 to S190, which are described in detail below.

Step S110: obtaining the heart movement information and the pulse wave signal of the detected object.

The following is a description of cardiac motion information and its acquisition.

In an embodiment, the cardiac motion information may include at least one of a heart rate, a pulse rate, a heart beat interval time, and a number of template waveforms within a first preset time period. The physiological signals such as the heart rate and the pulse rate can be acquired in real time through a sensor attached to the detected object, preferably, the physiological signals such as the heart rate and the pulse rate can be acquired synchronously with the pulse wave signal, and historical data of the heart rate and the pulse rate of the detected object can also be used.

And the heart rate interval may be calculated from a heart rate or a pulse rate, so when the heart motion information is the heart rate interval, the step S110 of acquiring the heart motion information of the detected object may include: acquiring an electrocardiosignal of a detected object, and calculating the heartbeat interval time of the detected object according to the electrocardiosignal; or acquiring a pulse rate signal of the detected object, and calculating the heartbeat interval time of the detected object according to the pulse rate signal.

The acquisition of the pulse wave signal will be explained below.

In one embodiment, the step S110 of acquiring the pulse wave signal of the detected object includes: acquiring pulse wave signals of the detected object under different pressure states in turn, wherein the longest duration of each pressure state is determined based on the acquired heart motion information. There are at least two or more different pressure states, and the pressure to which the detected object is subjected in each pressure state is different. The maximum duration of time under each pressure condition is constant or substantially constant as the pressure experienced by the test object. For example, there may be three pressure states, which are a first pressure state, a second pressure state and a third pressure state, respectively, where the pressure applied to the detected object in the first pressure state is a first pressure, the pressure applied to the detected object in the second pressure state is a second pressure, and the pressure applied to the detected object in the third pressure state is a third pressure, where the first pressure, the second pressure and the third pressure are not equal to each other. In one embodiment, the pulse wave signal of the detected object can be obtained according to the process from large to small or from small to large of the pressure to which the detected object is subjected in different pressure states. For example, the pulse wave signals of the detected object in a first pressure state, a second pressure state and a third pressure state may be acquired in sequence, wherein the first pressure > the second pressure > the third pressure.

The maximum duration of each pressure state may be a constant value or may be determined based on cardiac motion information of the subject. In an embodiment, the longest duration in each of the pressure states may be determined based on a heartbeat interval time, wherein the heartbeat interval time is determined based on the cardiac motion information. In one embodiment, the maximum duration of each of the pressure states may be a preset number of times the heartbeat interval time. For example, if the heartbeat interval time obtained by the cardiac motion information of the detected object is T and the preset number multiple is N times, the longest duration time in each pressure state is N × T. The heart beat interval time of each person is different, and some are longer and some are shorter. If the longest duration in each pressure state is a constant value t, it is possible that an appropriate number (e.g., two) of pulse wave signals can be acquired in a time shorter than t for a detected object with a shorter heartbeat interval time; for the detected object with longer heart beat interval, it is possible to acquire the proper amount of pulse wave signals in a time longer than t. Therefore, the longest duration time under each pressure state is adaptively set by combining the heart motion information of the detected object, the blood pressure measurement time can be effectively shortened, the measurement comfort is improved, and the possible damage of the detected object caused by compression is reduced; the measurement efficiency can also be improved.

Step S130: and acquiring a motion signal of the detected object through a motion sensor attached to the detected object. A motion sensor is a sensor for sensing the motion of a detected object. In an embodiment, the motion sensor may include at least one of an acceleration sensor, an angular velocity sensor (e.g., a gyroscope), or a gravity sensor, and the corresponding motion signals are an acceleration signal, an angular velocity signal, and a gravity acceleration signal, respectively. The motion sensor is attached to the detected object, can be directly attached to the body or clothes of the detected object, and can also be arranged on a device (such as a sleeve) for detecting pulse wave signals. In an embodiment, the pulse wave signal and the motion signal of the detected object may be acquired synchronously, that is, the motion signal of the detected object may be acquired synchronously while the pulse wave signal of the detected object is acquired. The synchronous acquisition can improve the accuracy of subsequent identification of signal segments disturbed by motion.

Step S150: and determining the motion intensity of the detected object according to the motion signal. In an embodiment, the step S150 of determining the motion strength of the detected object according to the motion signal includes: determining a motion strength of the detected object based on the amplitude and/or frequency of the motion signal. For example, the amplitude of the motion signal of the detected object is positively correlated with the motion intensity, and the larger the amplitude of the acquired motion signal of the detected object is, the larger the motion intensity of the detected object is; similarly, the frequency of the motion signal of the detected object is positively correlated with the motion intensity, and the higher the frequency of the acquired motion signal of the detected object is, the greater the motion intensity of the detected object is. When the motion sensor is an acceleration sensor, or an angular velocity sensor (gyroscope) or a gravity sensor, the motion signals respectively corresponding to the motion sensor are an acceleration signal, an angular velocity signal and a gravity acceleration signal, and at this time, the acceleration signal, the angular velocity signal or the gravity acceleration signal needs to be converted into data for identifying the motion intensity through calculation.

Step S170: and identifying a signal segment in the pulse wave signal corresponding to the time period of which the movement intensity is greater than the first intensity threshold value. In an embodiment, after the signal segment in the pulse wave signal corresponding to the time period in which the exercise intensity is greater than the first intensity threshold is identified in step S170, the signal segment may be further marked to indicate that the signal segment is a signal segment affected by exercise interference, and a subsequent search in step S190 needs to be performed.

Step S170 is to identify signal segments that are disturbed by motion, but when the motion state lasts too long, it may not be currently suitable for blood pressure measurement, and further action is required. For example, in one embodiment, the optimization method further includes: when the longest duration time that the movement intensity is larger than the first intensity threshold value is identified to exceed the time threshold value, the following step S190 of searching the signal segment for the pulse wave signal consistent with the heart movement information, and/or stopping acquiring the pulse wave signal of the detected object, and/or sending out an alarm prompt message is stopped.

Step S190: and searching out a pulse wave signal (namely, a valid pulse wave signal, hereinafter referred to as a valid pulse wave signal) consistent with the heart motion information in the signal segment based on the heart motion information. Since the effective pulse wave signal, or the above mentioned normal pulse wave signal, is a series of signals with the same source as the heart beat and regular interval time, and the oscillation wave caused by the motion disturbance is a series of signals with random interval, the effective pulse wave signal can be searched from the pulse wave signal segment affected by the motion disturbance based on the heart beat or the signals and parameters related to the heart beat, etc., which can effectively avoid the influence and interference of the motion of the detected object on the blood pressure measurement.

Thus, in an embodiment, the valid pulse wave signal may comprise: and the pulse wave signal is consistent with at least one of the heart rate, the pulse rate, the heartbeat interval time and the template waveform quantity within a first preset time length.

The description will be made by taking the heartbeat interval time as an example. For example, the valid pulse wave signal may comprise a pulse wave signal having a coincidence with the heartbeat interval time, which means a pulse wave signal having a pulse wave interval time coinciding with the heartbeat interval time. As mentioned in the background art, the pulse wave is an oscillation wave caused by the pulsation of the human pulse, and an oscillation wave may be formed due to the motion disturbance, and the oscillation wave formed due to the motion disturbance is generally regarded as an oscillation wave caused by the pulsation of the human pulse, i.e. a pulse wave, at the signal location; whether the oscillatory waves are caused by the human pulse or are formed by motion interference, the oscillatory waves are generally called as pulse waves, but for the sake of distinction, the oscillatory waves caused by the human pulse are called as effective pulse waves, meaning that the oscillatory waves are real pulse waves; the oscillatory wave formed due to the motion disturbance is referred to as an invalid pulse wave, meaning that this is a false pulse wave. The movement disturbance may also affect the position of the active pulse waves, i.e. the time interval between two adjacent active pulse waves may vary due to the movement disturbance. Therefore, the valid pulse wave signals may include: a pulse wave signal in which the pulse wave interval time coincides with the heartbeat interval time refers to a pulse wave signal in which: searching a plurality of pulse waves which are consistent with the heartbeat interval time when the signal segment is interfered, wherein the interval time of the pulse waves can be the same or different, but are all integral multiples (for example, 1 time or multiple times) of the heartbeat interval time; these pulse waves are effective pulse wave signals. Thus, the valid pulse wave signals may include: pulse wave signals with the same pulse wave interval time or pulse wave signals with the same pulse wave interval time and integral multiple of the heartbeat interval time.

Similarly, the valid pulse wave signal includes: the pulse wave signals having a coincidence with the heart rate may be pulse wave signals in which the number of heart beats within a set time is coincident with the number of pulse wave signals, or may be pulse wave signals in which the pulse wave interval time is coincident with the heart beat interval time represented by the heart rate. The effective pulse wave signal includes: the pulse wave signals having the same pulse rate may be pulse signals in which the number of pulses in a set time period is equal to the number of pulse wave signals, or pulse wave signals in which the pulse wave interval time is equal to the heartbeat interval time represented by the pulse rate.

The effective pulse wave signal includes: the pulse wave signals having consistency with the number of template waveforms in the first preset time period may mean that, when valid pulse wave signals are searched for in the interfered signal segment, only pulse waves with the number of template waveforms exist in the signal segment within the first preset time period, and if pulse waves with the number greater than that of template waveforms exist in the signal segment within the first preset time period, it is indicated that the excessive pulse waves are oscillation waves caused by motion, that is, the above-mentioned invalid pulse waves. It should be noted that the number of template waveforms is 2, when there are more than 2 pulse waves, for example, 5 pulse waves, in the first preset time duration in the interfered signal segment, it is noted that 2 of the pulse waves are valid pulse waves, and 3 of the pulse waves are invalid pulse waves, that is, 3 of the pulse waves are oscillation waves caused by motion, and the 2 valid pulse waves need to be identified, where the identification method may be to search for pulse waves with similar amplitude and/or slope (similar waveform) from the 5 pulse waves as valid pulse waves according to the amplitude and/or slope, etc. of the waveform of the valid pulse wave signals that have been searched before. Of course, the first preset time duration may be set with reference to the heartbeat interval time, that is, the first preset time duration and the template waveform number may be set with reference to the heartbeat interval time.

The searched valid pulse wave signals can be used for calculating blood pressure values and the like.

The optimization of the blood pressure measurement is carried out in the blood pressure measurement process of the detected object; in one embodiment, an optimization can be performed at a stage before the start of blood pressure measurement, that is, the timing of the start of blood pressure measurement is improved. In an embodiment, referring to fig. 5, before the obtaining the pulse wave signal of the detected object, the optimization method further includes a step S100 of determining whether to start the blood pressure measurement, which is described in detail below.

Step S100: when an instruction for starting blood pressure measurement is received, a motion signal of the detected object is pre-acquired, whether the motion intensity of the detected object is larger than a second intensity threshold value or not is judged according to the motion signal, if not, the blood pressure measurement is started, and if yes, whether the blood pressure measurement is started or not is judged again after a second preset time is delayed (namely, the motion signal of the detected object is pre-acquired again, and whether the motion intensity of the detected object is larger than the second intensity threshold value or not is judged according to the motion signal). In an embodiment, after delaying the second preset time, it is determined again whether to start the blood pressure measurement, and if the exercise intensity of the detected object is still greater than the second intensity threshold, the blood pressure measurement is abandoned and/or an alarm prompt message is sent. The discarding of the blood pressure measurement may be, for example, not starting the blood pressure measurement. That is to say, when an instruction for starting blood pressure measurement is received, it is first determined whether the detected object is doing a relatively violent exercise (the exercise intensity is greater than the second intensity threshold value) through the acquired exercise signal, if it is determined that the detected object is doing a relatively violent exercise, the second preset time period is delayed, and then it is determined again whether the detected object is doing a relatively violent exercise, and if it is not doing a relatively violent exercise, the blood pressure measurement may be started. And if the detected object is judged to do violent movement again after delaying the second preset time, giving up the blood pressure measurement and/or sending out alarm prompt information.

Referring to fig. 6, in an embodiment of the present invention, a monitor is disclosed, which may be a blood pressure measuring device, such as a fixed blood pressure measuring device or a mobile blood pressure measuring device (e.g. a wearable monitor), and may include a pulse wave sensing unit 10, a motion sensor 20 and a processing unit 30, which will be described in detail below.

The pulse wave sensing unit 10 is used for sensing a pulse wave of the detected object and outputting a pulse wave signal. The pulse wave sensing unit 10 may include a sensor for sensing a pulse wave, such as a pressure sensor and/or a photoelectric sensor. Sensors for sensing pulse waves have been widely used and are not described in depth.

The motion sensor 20 senses a motion state of the detected object by attaching to the detected object and outputs a motion signal. The motion sensor 20 is a sensor for sensing the motion of the detected object. In an embodiment, the motion sensor 20 may include at least one of an acceleration sensor, an angular velocity sensor (e.g., a gyroscope), or a gravity sensor, and the corresponding motion signals are an acceleration signal, an angular velocity signal, and a gravity acceleration signal, respectively. The motion sensor is attached to the detected object, can be directly attached to the body or clothes of the detected object, and can also be arranged on a device (such as a sleeve) for detecting pulse wave signals.

The processing unit 30 is configured to determine a motion intensity of the detected object according to the motion signal, and identify a signal segment in the pulse wave signal corresponding to a time period in which the motion intensity is greater than a first intensity threshold; obtaining the heart movement information of the detected object, searching out the pulse wave signal (namely the effective pulse wave signal) consistent with the heart movement information in the signal segment based on the heart movement information, and calculating the blood pressure value according to the searched pulse wave signal consistent with the heart movement information. It can be seen that the processing unit 30 needs to identify the disturbed pulse wave signal segment; then searching out effective pulse wave signals in the interfered signal segments based on the heart movement information; then, a blood pressure value is calculated based on the valid pulse wave signal, which will be described in detail below.

The processing unit 30 identifies the interfered pulse wave signal segment, and determines the motion intensity of the detected object according to the motion signal, in an embodiment, the processing unit 30 may determine the motion intensity of the detected object based on the amplitude and/or frequency of the motion signal, for example, the amplitude of the motion signal of the detected object is positively correlated with the motion intensity, and the larger the amplitude of the obtained motion signal of the detected object is, the larger the motion intensity of the detected object is; similarly, the frequency of the motion signal of the detected object is positively correlated with the motion intensity, and the higher the frequency of the acquired motion signal of the detected object is, the greater the motion intensity of the detected object is. Then, the processing unit 30 identifies the signal segment in the pulse wave signal corresponding to the time period in which the exercise intensity is greater than the first intensity threshold, and in an embodiment, after the processing unit 30 identifies the signal segment in the pulse wave signal corresponding to the time period in which the exercise intensity is greater than the first intensity threshold, the signal segment may be further marked to indicate that the signal segment is a signal segment affected by exercise interference and needs to be used for subsequent search. In an embodiment, the processing unit 30 is further configured to control the pulse wave sensing unit 10 and the motion sensor 20 to synchronously operate to obtain the pulse wave signal and the motion signal of the detected object, which is advantageous in temporally corresponding the pulse wave signal and the motion signal, and simplifies the difficulty and technical requirement of identifying the signal segment in the pulse wave signal corresponding to the time period in which the motion intensity is greater than the first intensity threshold. It should be noted that, as described above, when the motion sensor 20 is an acceleration sensor, or an angular velocity sensor (gyroscope) or a gravity sensor, the corresponding motion signals are an acceleration signal, an angular velocity signal and a gravity acceleration signal, and therefore, when the processing unit 30 determines the motion intensity of the detected object according to the motion signals, and specifically implements the determination, the acceleration signal, the angular velocity signal or the gravity acceleration signal may be converted into data for identifying the motion intensity through calculation, and then the motion intensity of the detected object may be determined.

The processing unit 30 then searches for a valid pulse wave signal in the disturbed signal segment on the basis of the heart motion information.

Before searching, the processing unit 30 acquires the heart motion information of the detected object. In an embodiment, the cardiac motion information may include at least one of a heart rate, a pulse rate, a heart beat interval time, and a number of template waveforms within a first preset time period. For example, referring to fig. 7, taking a heart rate as an example, the blood pressure measuring apparatus may further include an electrocardiographic signal detecting unit 40 for detecting and outputting an electrocardiographic signal of the detected object, and the processing unit 30 acquires the heart rate of the detected object through the electrocardiographic signal detecting unit 40 attached to the detected object; for another example, the blood pressure measuring apparatus may further include a pulse rate signal detecting unit 50 for detecting and outputting a pulse rate signal of the detected subject, and the processing unit 30 acquires the pulse rate of the detected subject by the pulse rate signal detecting unit 50 attached to the detected subject. Of course, the processing unit 30 may also directly access and acquire data of the historical heart rate or pulse rate of the detected subject. For the heart beat interval, the processing unit 30 may calculate the heart beat interval according to the real-time acquired or historical heart rate or pulse rate; likewise, the processing unit 30 may directly access and acquire the historical heart beat interval of the detected object.

After acquiring the cardiac motion information of the detected object, the processing unit 30 searches for a valid pulse wave signal in the interfered signal segment based on the cardiac motion information, and in an embodiment, the valid pulse wave signal may include: and the pulse wave signals are consistent with at least one of the heart rate, the pulse rate, the heartbeat interval time and the template waveform quantity within a first preset time length.

The description will be made by taking the heartbeat interval time as an example. For example, the valid pulse wave signal may comprise a pulse wave signal having a coincidence with the heartbeat interval time, which means a pulse wave signal having a pulse wave interval time coinciding with the heartbeat interval time. In particular, a valid pulse wave signal refers to a pulse wave signal that: searching a plurality of pulse waves which are consistent with the heartbeat interval time when the signal segment is interfered, wherein the interval time of the pulse waves can be the same or different, but are all integral multiples (for example, 1 time or multiple times) of the heartbeat interval time; these pulse waves are effective pulse wave signals. Thus, the valid pulse wave signals may include: pulse wave signals with the same pulse wave interval time or pulse wave signals with the same pulse wave interval time and integral multiple of the heartbeat interval time. Similarly, the valid pulse wave signal may include: the pulse wave signals consistent with the heart rate may refer to pulse wave signals with the same number of heart beats within a set time, or may refer to pulse wave signals with the same pulse wave interval time as the heart beat interval time represented by the heart rate. The effective pulse wave signal includes: the pulse wave signals having the same pulse rate may be pulse signals having the same number of pulses within a set time as the pulse wave signals, or pulse wave signals having the same pulse wave interval time as the heartbeat interval time represented by the pulse rate. The effective pulse wave signal includes: the pulse wave signals having consistency with the number of template waveforms in the first preset time period may mean that, when valid pulse wave signals are searched for in the interfered signal segment, only pulse waves with the number of template waveforms exist in the signal segment within the first preset time period, and if pulse waves with the number greater than that of template waveforms exist in the signal segment within the first preset time period, it is indicated that the excessive pulse waves are oscillation waves caused by motion, that is, the above-mentioned invalid pulse waves. It should be noted that the number of template waveforms is 2, when there are more than 2 pulse waves, for example, 5 pulse waves, in the first preset time duration in the interfered signal segment, it is noted that 2 of the pulse waves are valid pulse waves, and 3 of the pulse waves are invalid pulse waves, that is, 3 of the pulse waves are oscillation waves caused by motion, the processing unit 30 needs to identify the 2 valid pulse waves, and the identification method may be to search for pulse waves with similar amplitude and/or slope among the 5 pulse waves as valid pulse waves according to the amplitude and/or slope (similar waveform) of the waveform of the valid pulse wave signal that has been searched before. Of course, the first preset time length may also be set with reference to the heartbeat interval time, that is, the first preset time length and the template waveform number are set with reference to the heartbeat interval time.

The above is a process in which the processing unit 30 optimizes the pulse wave signal of the subject to be detected in the blood pressure measurement process. In a specific blood pressure measuring process, the pulse wave sensing unit 10 sequentially obtains pulse wave signals of the detected object under different pressure states. There are at least two or more different pressure states, and the pressure to which the detected object is subjected in each pressure state is different. The maximum duration of time under each pressure condition is constant or substantially constant as the pressure experienced by the test object. For example, there may be three pressure states, which are a first pressure state, a second pressure state and a third pressure state, respectively, where the pressure applied to the detected object in the first pressure state is a first pressure, the pressure applied to the detected object in the second pressure state is a second pressure, and the pressure applied to the detected object in the third pressure state is a third pressure, where the first pressure, the second pressure and the third pressure are not equal to each other. In one embodiment, the pulse wave signal of the detected object can be obtained according to the process from large to small or from small to large of the pressure to which the detected object is subjected in different pressure states. For example, the pulse wave signals of the detected object in a first pressure state, a second pressure state and a third pressure state may be acquired in sequence, wherein the first pressure > the second pressure > the third pressure. The maximum duration of each pressure state may be a constant value or may be determined based on cardiac motion information of the subject. In an embodiment, referring to fig. 8, the blood pressure measuring device further comprises a setting unit 60, and the setting unit 60 is configured to determine the longest duration of each of the pressure states based on the acquired cardiac motion signal. In an embodiment the setting unit 60 determines a heart beat interval time based on said heart motion information, the longest duration in each of said stress states being determined based on said heart beat interval time. In one embodiment, the maximum duration of each of the pressure states may be a preset number of times the heartbeat interval time. For example, if the heartbeat interval time obtained by the cardiac motion information of the detected object is T and the preset number multiple is N times, the longest duration time in each pressure state is N × T. The heart beat interval time of each person is different, and some are longer and some are shorter. If the longest duration in each pressure state is a constant value t, it is possible that an appropriate number (e.g., two) of pulse wave signals can be acquired in a time shorter than t for a detected object with a shorter heartbeat interval time; for the detected object with longer heart beat interval, it is possible to acquire the proper amount of pulse wave signals in a time longer than t. The setting unit 60 adaptively sets the longest duration time in each pressure state in combination with the heart motion information of the detected object, so that the blood pressure measurement time can be effectively shortened, the measurement comfort is improved, and the possible damage to the detected object caused by compression is reduced; the measurement efficiency can also be improved.

The processing unit 30 may also optimize the stopping or starting of the blood pressure measurement. Therefore, referring to fig. 9, in an embodiment, the blood pressure measuring apparatus may further include an alarm unit 70 for alarming according to the alarm prompting information of the processing unit 30, which is described in detail below.

In an embodiment, when the maximum duration of the motion intensity greater than the first intensity threshold is identified to exceed the time threshold, the processing unit 30 stops searching for the valid pulse wave signal in the signal segment, and/or stops acquiring the pulse wave signal of the detected object, and/or issues an alarm prompt message.

In an embodiment, before acquiring the pulse wave signal of the detected object, when receiving an instruction to start blood pressure measurement, the processing unit 30 pre-acquires a motion signal of the detected object, determines whether the motion intensity of the detected object is greater than a second intensity threshold according to the motion signal, if so, delays for a second preset time period, and then determines again whether to start the blood pressure measurement, otherwise, starts the blood pressure measurement. In an embodiment, the processing unit 30 determines whether to start the blood pressure measurement again after the time delay is delayed for a second preset time period, and if the exercise intensity of the detected object is still greater than the second intensity threshold, abandons the blood pressure measurement and/or sends an alarm prompt message. That is, when receiving the instruction to start the blood pressure measurement, the processing unit 30 first determines whether the detected object is doing a relatively violent exercise (the exercise intensity is greater than the second intensity threshold) according to the acquired exercise signal, if the detected object is doing a relatively violent exercise, the processing unit delays for a second preset time period, and then determines again whether the detected object is doing a relatively violent exercise, and if the detected object is not doing a relatively violent exercise, the blood pressure measurement may be started. And if the detected object is judged to do violent movement again after delaying the second preset time, giving up the blood pressure measurement and/or sending out alarm prompt information.

The blood pressure measuring device of the present invention may further include some other components, for example, a cuff for being fitted over an arm or a wrist of the subject to be detected, and a charging and discharging unit for charging and discharging air to and from the cuff, wherein the pulse wave sensing unit 10 may be disposed in the cuff, and the motion sensor 20 may be disposed on the cuff or may be disposed on the subject to be detected; the processing unit 30 controls the charging and discharging unit to charge the cuff, and then gradually discharges the cuff according to a certain step length, and a stable pressure state lasting for a certain time is formed after each time of discharging, for example, the processing unit 30 controls the charging and discharging unit according to the longest duration time of the pressure state set by the setting unit 60, so that each pressure state lasts for a corresponding time; in each stable pressure state, the processing unit 30 controls the pulse wave sensing unit 10 to acquire the pulse wave signal in the stable pressure state.

It should be noted that the blood pressure measuring device disclosed in fig. 6 to 9 is also a monitor, and therefore, some other structures and components of the blood pressure measuring device disclosed in fig. 6 to 9 may also refer to the monitor disclosed in fig. 1 and 2, for example, the setting unit 60 and the processing unit 30 in the monitor disclosed in fig. 6 to 9 may be implemented by the main processor 115 in fig. 1 and 2, the pulse wave sensing unit 10, the electrocardiographic signal detecting unit 40, and the pulse rate signal detecting unit 50 may also be a sensor accessory 111, respectively, the alarm unit 70 may be implemented by the alarm circuit 120, and the blood pressure measuring device disclosed in fig. 6 to 9 may further include other components disclosed in fig. 1 and 2, such as the isolated power supply and communication interface 114, the external communication and power supply interface 116, and the like, which are not described herein again. In addition, the blood pressure measuring device disclosed in fig. 6 to 9 may also be all or part of the portable monitoring device 213 shown in fig. 3, for example, part of the steps of fig. 4 may be executed in the portable monitoring device 213, and part may be executed in the bedside monitor 212; alternatively, all of the steps of fig. 4 are performed in the portable monitoring device 213 and the processed data is displayed for output and stored by the central station 211 or the bedside monitor 212.

Reference is made herein to various exemplary embodiments. However, those skilled in the art will recognize that changes and modifications may be made to the exemplary embodiments without departing from the scope hereof. For example, the various operational steps, as well as the components used to perform the operational steps, may be implemented in differing ways depending upon the particular application or consideration of any number of cost functions associated with operation of the system (e.g., one or more steps may be deleted, modified or incorporated into other steps).

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. Additionally, as will be appreciated by one skilled in the art, the principles herein may be reflected in a computer program product on a computer readable storage medium, which is pre-loaded with computer readable program code. Any tangible, non-transitory computer-readable storage medium may be used, including magnetic storage devices (hard disks, floppy disks, etc.), optical storage devices (CD-ROMs, DVDs, Blu Ray disks, etc.), flash memory, and/or the like. These computer program instructions may be loaded onto a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions which execute on the computer or other programmable data processing apparatus create means for implementing the functions specified. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including means for implementing the function specified. The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified.

While the principles herein have been illustrated in various embodiments, many modifications of structure, arrangement, proportions, elements, materials, and components particularly adapted to specific environments and operative requirements may be employed without departing from the principles and scope of the present disclosure. The above modifications and other changes or modifications are intended to be included within the scope of this document.

The foregoing detailed description has been described with reference to various embodiments. However, one skilled in the art will recognize that various modifications and changes may be made without departing from the scope of the present disclosure. Accordingly, the disclosure is to be considered in an illustrative and not a restrictive sense, and all such modifications are intended to be included within the scope thereof. Also, advantages, other advantages, and solutions to problems have been described above with regard to various embodiments. However, the benefits, advantages, solutions to problems, and any element(s) that may cause any element(s) to occur or become more pronounced are not to be construed as a critical, required, or essential feature or element of any or all the claims. As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, system, article, or apparatus. Furthermore, the term "coupled," and any other variation thereof, as used herein, refers to a physical connection, an electrical connection, a magnetic connection, an optical connection, a communicative connection, a functional connection, and/or any other connection.

Those skilled in the art will recognize that many changes may be made to the details of the above-described embodiments without departing from the underlying principles of the invention. Accordingly, the scope of the invention should be determined only by the following claims.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. Variations of the above-described embodiments may be made by those skilled in the art, consistent with the principles of the invention.

Claims

A method for optimizing blood pressure measurements, comprising:

acquiring heart motion information and pulse wave signals of a detected object;

acquiring a motion signal of the detected object through a motion sensor attached to the detected object;

determining the motion intensity of the detected object according to the motion signal;

identifying a signal segment in the pulse wave signal corresponding to a time segment of which the exercise intensity is greater than a first intensity threshold value;

and searching out a pulse wave signal which is consistent with the heart movement information in the signal section based on the heart movement information.
The optimization method according to claim 1, wherein the pulse wave signal and the motion signal of the detected subject are acquired simultaneously.
The optimization method of claim 1, wherein the determining the intensity of the motion of the detected object from the motion signal comprises: determining a motion strength of the detected object based on the amplitude and/or frequency of the motion signal.
The optimization method according to claim 1, wherein after identifying the signal segment in the pulse wave signal corresponding to the time period in which the intensity of the movement is greater than the first intensity threshold, the signal segment is labeled.
The optimization method of claim 1, wherein the cardiac motion information comprises at least one of a heart rate, a pulse rate, a heart beat interval time, a number of template waveforms within a first preset time duration.
The optimization method according to claim 5, wherein the pulse wave signal having consistency with the heart motion information includes: and the pulse wave signal is consistent with at least one of the heart rate, the pulse rate, the heartbeat interval time and the template waveform quantity within a first preset time length.
The optimization method of claim 5, wherein the cardiac motion information is a heartbeat interval time, and the acquiring the cardiac motion information of the detected object comprises:

acquiring an electrocardiosignal of a detected object, and calculating the heartbeat interval time of the detected object according to the electrocardiosignal; alternatively, the first and second electrodes may be,

acquiring a pulse rate signal of a detected object, and calculating the heartbeat interval time of the detected object according to the pulse rate signal.
The optimization method according to claim 5 or 7, wherein the pulse wave signal having consistency with the heart motion information includes: pulse wave signals with pulse wave interval time consistent with the heartbeat interval time.
The optimization method according to claim 1, wherein the acquiring the pulse wave signal of the detected subject includes: acquiring pulse wave signals of the detected object under different pressure states in turn, wherein the longest duration of each pressure state is determined based on the acquired heart motion information.
The optimization method of claim 9, wherein the longest duration for each of the pressure states is determined based on a heartbeat interval time, wherein the heartbeat interval time is determined based on the cardiac motion information.
The optimization method according to claim 10, wherein the longest duration in each of the pressure states is a preset number of multiples of the heart beat interval time.
The optimization method according to claim 1, wherein when the longest duration of time for which the movement intensity is identified to be greater than the first intensity threshold exceeds a time threshold, the search for the pulse wave signals having consistency with the heart movement information in the signal segment is stopped, and/or the acquisition of the pulse wave signals of the detected subject is stopped, and/or an alarm prompt message is issued.
The optimization method according to claim 1, further comprising, before the acquiring the pulse wave signal of the subject, determining whether to initiate the blood pressure measurement: when an instruction for starting blood pressure measurement is received, a motion signal of the detected object is pre-acquired, whether the motion intensity of the detected object is larger than a second intensity threshold value or not is judged according to the motion signal, if yes, the blood pressure measurement is started after a second preset time is delayed, and if not, the blood pressure measurement is started.
The optimization method of claim 13, wherein the blood pressure measurement is determined again after a second preset time delay, and if the exercise intensity of the detected object is still greater than the second intensity threshold, the blood pressure measurement is abandoned and/or an alarm prompt message is sent.
A computer-readable storage medium, characterized by comprising a program executable by a processor to implement the method of any one of claims 1 to 14.
A blood pressure measuring device, comprising:

the pulse wave sensing unit is used for sensing the pulse wave of the detected object and outputting a pulse wave signal;

a motion sensor sensing a motion state of the detected object by attaching to the detected object and outputting a motion signal;

the processing unit is used for obtaining the heart motion information of the detected object; determining the motion intensity of the detected object according to the motion signal; identifying a signal segment in the pulse wave signal corresponding to a time segment of which the exercise intensity is greater than a first intensity threshold value; and searching pulse wave signals consistent with the heart motion information in the signal section based on the heart motion information, and calculating a blood pressure value according to the searched pulse wave signals consistent with the heart motion information.
The blood pressure measuring device of claim 16, wherein the processing unit is further configured to control the pulse wave sensing unit and the motion sensor to operate synchronously to acquire the pulse wave signal and the motion signal of the subject synchronously.
A blood pressure measuring device according to claim 16, wherein the processing unit determines the intensity of the movement of the detected subject based on the amplitude and/or frequency of the movement signal.
A blood pressure measuring device according to claim 16, wherein the processing unit performs labeling processing on the signal segment in the pulse wave signal after identifying the signal segment corresponding to the time period in which the exercise intensity is greater than the first intensity threshold.
The blood pressure measurement device of claim 16, wherein the heart motion information includes at least one of a heart rate, a pulse rate, a heart beat interval time, a number of template waveforms within a first preset time period.
A blood pressure measuring device as set forth in claim 20, wherein the pulse wave signal having consistency with the heart motion information includes: and the pulse wave signals are consistent with at least one of the heart rate, the pulse rate, the heartbeat interval time and the template waveform quantity within a first preset time length.
The blood pressure measuring device according to claim 20, further comprising an electrocardiographic signal detecting unit for detecting and outputting an electrocardiographic signal of the subject, wherein the processing unit calculates a heartbeat interval time based on the electrocardiographic signal; or, the device further comprises a pulse rate signal detection unit for detecting and outputting a pulse rate signal of the detected object, and the processing unit calculates the heartbeat interval time according to the pulse rate signal.
A blood pressure measuring device according to claim 20 or 22, wherein the pulse wave signal having correspondence with the heart motion information includes: pulse wave signals with pulse wave interval time consistent with the heartbeat interval time.
A blood pressure measuring device according to claim 16, further comprising a setting unit; the pulse wave sensing unit sequentially acquires pulse wave signals of the detected object under different pressure states; the setting unit is adapted to determine a longest duration for each of the pressure states based on the acquired heart motion signals.
A blood pressure measuring device according to claim 24, wherein the setting unit determines a heartbeat interval time based on the heart motion information, and determines the longest duration time in each of the pressure states based on the heartbeat interval time.
A blood pressure measuring device as recited in claim 25, wherein the maximum duration of each of said pressure states is a multiple of a preset number of said heartbeat interval times.
A blood pressure measuring device according to claim 16, wherein the processing unit stops searching for the pulse wave signal consistent with the heart movement information in the signal segment and/or stops acquiring the pulse wave signal of the detected subject and/or issues an alarm prompt message when the maximum duration of the movement intensity greater than the first intensity threshold value is identified to exceed a time threshold value.
The device for measuring blood pressure according to claim 16, wherein before acquiring the pulse wave signal of the subject, the processing unit pre-acquires the exercise signal of the subject when receiving the instruction for starting the blood pressure measurement, determines whether the exercise intensity of the subject is greater than a second intensity threshold according to the exercise signal, delays for a second preset time period if the exercise intensity is greater than the second intensity threshold, and then determines whether the blood pressure measurement is started again, otherwise, starts the blood pressure measurement.
The device of claim 28, wherein the processing unit determines whether to start the blood pressure measurement again after the delay time is a second preset time period, and if the exercise intensity of the detected object is still greater than the second intensity threshold, the processing unit abandons the blood pressure measurement and/or sends out an alarm prompt message.
A blood pressure measuring device as recited in claim 27 or 29, further comprising an alarm unit for giving an alarm based on the alarm notice information.
The blood pressure measuring device according to claim 16 or 24, further comprising a cuff for fitting over an arm or a wrist of the subject, and an inflation and deflation unit for inflating and deflating the cuff; the processing unit controls the charging and discharging unit to charge the oversleeves and then gradually discharge air according to a certain step length, and a stable pressure state lasting for a certain time is formed after each time of discharging air; and under each stable pressure state, the processing unit controls the pulse wave sensing unit to acquire the pulse wave signals under the stable pressure state.
A blood pressure measuring device as recited in claim 31, wherein said pulse wave sensing unit is disposed within said cuff; the motion sensor is arranged on the sleeve or is arranged on the detected object.
A blood pressure measuring device as recited in claim 16, wherein the motion sensor includes at least one of an acceleration sensor, an angular velocity sensor, or a gravity sensing sensor.