CN114287897A - Blood pressure data acquisition method, chip, electronic device and readable storage medium - Google Patents
Blood pressure data acquisition method, chip, electronic device and readable storage medium Download PDFInfo
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Abstract
The embodiment of the application relates to the technical field of blood pressure measurement, and provides a blood pressure data acquisition method, a chip, electronic equipment and a computer-readable storage medium. The blood pressure data acquisition method comprises the following steps: acquiring a data acquisition result corresponding to the ith pressure interval in the process of applying pressure to the object to be detected by the force application object; the data acquisition result is data acquisition or data acquisition failure, and the data acquisition comprises the following steps: collecting data meeting a preset standard or collecting data not meeting the preset standard; determining whether key point data used for calculating the blood pressure value is lost or not according to the data acquisition result; if the key point data is lost, prompting the force application object to apply a key pressure value, and acquiring PPG data corresponding to the key pressure value; and if the key point data is not lost or PPG data corresponding to the key pressure value is acquired, acquiring a data acquisition result corresponding to the (i + 1) th pressure interval to improve the blood expression value rate and the accuracy of the measurement result.
Description
Technical Field
The embodiment of the application relates to the technical field of blood pressure measurement, in particular to a blood pressure data acquisition method, a chip, electronic equipment and a computer readable storage medium.
Background
The mercury sphygmomanometer is the gold standard in the field of blood pressure measurement at present, requires a user to have certain professional knowledge, and can dynamically adjust a data acquisition mode according to the actual condition of a tester, so that the test result is accurate, and the application crowd range is wide.
However, at present, the electronic sphygmomanometer in the market is convenient to use, a relatively fixed data acquisition mode is generally used during testing, the data acquisition mode is generally only suitable for partial people, cannot be adjusted according to the actual situation of a user, and is also easily affected by environmental factors, noise and the like to cause data loss or abnormality, so that the problems of low blood pressure value rate, low accuracy of measurement results and the like are caused.
Disclosure of Invention
An object of the embodiments of the present application is to provide a blood pressure data collecting method, a chip, an electronic device, and a computer-readable storage medium, so as to improve blood pressure expression rate and measurement result accuracy.
In a first aspect, an embodiment of the present application provides a blood pressure data acquisition method, including: acquiring a data acquisition result corresponding to the ith pressure interval in the process of applying pressure to the object to be detected by the force application object; wherein the data acquisition result comprises acquired data and non-acquired data, and the acquired data comprises: acquiring data meeting a preset standard and acquiring data not meeting the preset standard, wherein i is more than or equal to 1 and less than or equal to n, and n is a natural number more than 1; determining whether key point data used for calculating the blood pressure value is lost or not according to the data acquisition result; wherein the key point data comprises: key pressure values and photoplethysmography (PPG) data corresponding to the key pressure values; if the key point data is lost, prompting the force application object to apply the key pressure value, and acquiring PPG data corresponding to the key pressure value; and if the key point data is not lost or PPG data corresponding to the key pressure value is acquired, acquiring a data acquisition result corresponding to the (i + 1) th pressure interval.
As a possible implementation, the determining whether the key point data used for calculating the blood pressure value is lost according to the data acquisition result includes: and determining that key point data used for calculating the blood pressure value is lost under the condition that the data acquisition result is that no data is acquired or data which does not meet the preset standard is acquired, and determining the key pressure value as the pressure value in the ith pressure interval.
As a possible implementation, the data meeting the preset criteria includes: the ith pressure value applied by the force application object is within the ith pressure interval; when i is a natural number greater than 1, determining whether key point data used for calculating a blood pressure value is lost according to the data acquisition result, including: under the condition that the data acquisition result is that the data meeting the preset standard is acquired, determining the pressure difference value between the ith pressure value and the ith-1 pressure value applied by the force application object and positioned in the ith-1 pressure interval; if the pressure difference value is larger than a preset pressure interval, determining that key point data used for calculating the blood pressure value is lost, and determining the key pressure value as a pressure value in a complementary collection pressure interval; wherein the lower limit value of the supplementary mining pressure interval is greater than or equal to the ith-1 pressure value, and the upper limit value of the supplementary mining pressure interval is less than or equal to the ith pressure value.
As a possible implementation manner, the n pressure intervals are obtained by uniformly dividing the pressure intervals from 0 to Fn by the preset pressure interval, and Fn is a corresponding default blocking force when the blood vessel is blocked.
As a possible implementation manner, n pressure intervals are obtained based on 0 to Fn, and Fn is a corresponding default blocking force when the blood vessel is blocked.
As a possible implementation manner, during the process that the force application object applies the pressure to the object to be measured, the method further includes: if the pressure value Fm applied to the object to be detected by the force application object is different from the pressure value Fn when the vessel of the object to be detected is cut off, updating the pressure value Fn applied to the object to be detected by the force application object according to the pressure value Fm applied to the object to be detected by the force application object when the vessel of the object to be detected is cut off.
As a possible implementation manner, the updating, by the force application object, the Fn according to the pressure value applied by the force application object to the object to be measured when the blood vessel of the object to be measured is cut off includes: if the pressure value applied by the force application object to the object to be detected is within the preset truncation force range when the blood vessel of the object to be detected is truncated, the Fn is updated to the pressure value applied by the force application object to the object to be detected when the blood vessel of the object to be detected is truncated.
As a possible implementation manner, when the force application object is the object to be measured, the prompting the force application object to apply the key pressure value includes: displaying pressing prompt information through an interactive interface of the electronic equipment, wherein the pressing prompt information is used for prompting the key pressure value to be pressed by the object to be tested; when the force application object is the electronic device, the prompting the force application object to apply the key pressure value includes: and controlling the cuff/air bag in the electronic equipment to inflate or deflate so that the cuff/air bag applies the key pressure value to the object to be tested.
In a second aspect, an embodiment of the present application provides a chip, where the chip is connected to a memory, and the memory stores instructions for being executed by the chip, where the instructions are executed by the chip, so that the chip can execute the blood pressure data acquisition method according to the first aspect or any optional manner of the first aspect.
In a third aspect, an embodiment of the present application provides an electronic device, including: a chip as claimed in the second aspect, and a memory connected to the chip.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and the computer program is used for implementing the blood pressure data acquisition method according to the first aspect or any optional manner of the first aspect when executed by a processor.
According to the embodiment of the application, the acquired data is analyzed in the process of applying pressure to the object to be measured by the force application object, whether key point data is lost in the acquisition process is determined, and after the key point data is determined to be lost, the key point data is successfully acquired in an interactive mode of prompting the force application object to apply a key pressure value and the force application object, the problem that data is lost or abnormal in the blood pressure data acquisition process is effectively solved, the relatively complete and effective data for calculating the blood pressure value is obtained, and the blood pressure output rate and the accuracy of the measurement result are greatly improved.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic diagram of a PPG amplitude curve mentioned according to an embodiment of the application;
FIG. 2 is a diagram illustrating a method for calculating blood pressure using a double Gaussian fitting method according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a fitting curve lacking peak points and a fitting curve not lacking peak points according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a fitting curve lacking left full width half maximum points and a fitting curve not lacking left full width half maximum points, according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a fitting curve lacking right full width half maximum points and a fitting curve not lacking right full width half maximum points, according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a blood pressure data collecting module for actively applying pressure by a finger according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a balloon type blood pressure data acquisition module according to an embodiment of the present application;
FIG. 8 is a schematic flow chart of a blood pressure data acquisition method according to an embodiment of the present application;
FIG. 9 is a flow chart of one implementation of step 302 as referenced in an embodiment of the present application;
FIG. 10 is a schematic diagram of the data acquisition process and results of the n pressure zones according to the embodiment of the present application;
fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following describes each embodiment of the present application in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in various embodiments of the present application in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.
Currently, commonly used blood pressure measuring tools include: mercury sphygmomanometers based on korotkoff sounds, electronic sphygmomanometers based on oscillography or pulse wave method, and the like. Taking an acupressure oscillography as an example, the acupressure oscillography is mainly a reference armlet oscillography, a photoplethysmography (PPG) amplitude curve is obtained in a blood vessel blocking process through finger pressing, curve features are obtained in a multi-dimensional mode through curve fitting, and a final blood pressure result, namely, Systolic Blood Pressure (SBP)/Diastolic Blood Pressure (DBP) in fig. 1 is obtained according to curve fitting parameters (Parameter 1, Parameter2 and Parameter3 in fig. 1). The PPG amplitude curve is shown in fig. 1, with pressure on the abscissa and PPG amplitude on the ordinate.
The general calculation method of the oscillography is as follows: the pressure corresponding to the maximum change of the blood vessel volume is the average arterial pressure, and then the internal relation between the systolic pressure, the diastolic pressure and the average arterial pressure is determined according to the characteristics of the envelope curve, and finally the blood pressure result is obtained. FIG. 2 is a diagram illustrating the calculation of blood pressure by a double Gaussian fitting method. With reference to fig. 2, the method of calculating blood pressure results is as follows:
first, an envelope curve is fitted by a double gaussian function:
wherein, a1 and B1 are respectively the ordinate and abscissa of the peak point of the envelope curve, a2 is the ordinate of the intersection of the envelope curve and the y-axis, B2 is the difference between the abscissa of the peak point and the point (which may be referred to as the left full width half maximum point) located on the left side of the peak point on the envelope curve and half the height of the peak point, and B3 is the difference between the abscissa of the peak point and the point (which may be referred to as the right full width half maximum point) located on the right side of the peak point on the envelope curve and half the height of the peak point.
Then, after obtaining the parameters of the envelope curve, the diastolic pressure (DBP), systolic pressure (SBP), and mean arterial pressure (MBP) are calculated by the following formulas:
SBP＝2.5*MBP-1.6*DBP
from the principle of oscillography or pulse wave method, whether to obtain an accurate envelope curve is one of the key factors for accurately and stably measuring blood pressure. Taking the double-gauss fitting method as an example, the peak point, and the left and right full width at half maximum points of the envelope curve are key points. The lack of any key point may result in a large deformation of the envelope curve, resulting in a large deviation of the blood pressure measurement result. For example, reference may be made to fig. 3 to 5, where fig. 3 is a schematic diagram of a fitted curve lacking peak points and a fitted curve not lacking peak points, fig. 4 is a schematic diagram of a fitted curve lacking left full width half maximum points and a fitted curve not lacking left full width half maximum points, and fig. 5 is a schematic diagram of a fitted curve lacking right full width half maximum points and a fitted curve not lacking right full width half maximum points. In practical application, the influence of environmental factors, noise and the like easily causes the missing or abnormal key point data, and further causes the problems of low blood pressure value rate, low accuracy of measurement results and the like.
In order to solve the above technical problem, the present embodiment provides a blood pressure data collecting method, which is applied to an electronic device, where the electronic device includes a blood pressure data collecting module, and a schematic structural diagram of the blood pressure data collecting module may refer to fig. 6 or fig. 7. Fig. 6 is a blood pressure data acquisition module that the finger was exerted pressure actively, includes: a cover plate 101, a PPG sensor 102, a pressure sensor 103, a support structure 104 located between the cover plate 101 and the pressure sensor 103. The PPG sensor 102 includes a light-emitting Diode (LED) 1021 and a Photodiode (PD) 1022. Fig. 7 is a blood pressure data acquisition module of gasbag formula, includes: a finger cuff balloon 201, a pressure sensor 202, a PPG sensor 203, a gas conduit (gas pipeline) 204. Among other things, the PPG sensor 203 includes an LED 2031 and a PD 2032.
Fig. 8 can be referred to as a flow chart of the blood pressure data acquisition method in this embodiment, and the flow chart includes:
step 301: acquiring a data acquisition result corresponding to the ith pressure interval in the process of applying pressure to the object to be detected by the force application object;
step 302: determining whether key point data used for calculating the blood pressure value is lost or not according to the data acquisition result; if yes, go to step 303, otherwise go to step 305;
step 303: prompting a force application object to apply a key pressure value, and acquiring PPG data corresponding to the key pressure value;
step 304: if PPG data corresponding to the key pressure value is acquired, acquiring a data acquisition result corresponding to the (i + 1) th pressure interval;
step 305: and acquiring a data acquisition result corresponding to the (i + 1) th pressure interval.
In the embodiment, whether key point data is lost or not in the acquisition process is determined by analyzing the acquired data in the process of applying pressure to the object to be measured by the force application object, and after the key point data is determined to be lost, the key point data is successfully acquired by prompting the force application object to apply a key pressure value in an interactive mode with the force application object, so that the problem of data loss or abnormality in the blood pressure data acquisition process is effectively solved, more complete and effective data for calculating the blood pressure value is obtained, and the blood pressure output rate and the accuracy of the measurement result are greatly improved.
In step 301, the object to be measured is a user who needs to perform blood pressure measurement, the applying pressure to the object to be measured may specifically be applying pressure to a measurement portion of the object to be measured, and the measurement portion may be an arm, a finger, or the like of the object to be measured. The data acquisition result comprises the following steps: data is collected or not collected, the collecting data comprises: and collecting data meeting the preset standard or collecting data not meeting the preset standard, wherein i is more than or equal to 1 and less than or equal to n, and n is a natural number more than 1. The ith pressure interval can be understood as the ith pressure gear, a plurality of pressure intervals can be preset according to actual needs, and in the process of applying pressure to the object to be detected by the force application object, the data acquisition result corresponding to each pressure interval is obtained. If the data acquisition result corresponding to the ith pressure interval is the acquired data, the acquired data comprises the following steps: the pressure value in the ith pressure interval and the PPG data corresponding to the pressure value. If the data acquisition result corresponding to the ith pressure interval is that no data is acquired, it indicates that no pressure value in the ith pressure interval is acquired, and no PPG data corresponding to the pressure value is acquired.
In one example, n pressure intervals are obtained based on a division from 0 to Fn, which is the default occlusion force corresponding to the occurrence of the angiogenesis occlusion. This Fn may be understood as a default vessel-severing force, pre-stored in the electronic device. Fn may be understood as the end point pressure of the ideal envelope curve used for calculating the blood pressure value. The ideal envelope curve can be understood as an envelope curve which is obtained by fitting according to the pressure value and the PPG data acquired under the ideal environment and is used for calculating the blood pressure value. In this embodiment, finger data of some reference users may be collected in an ideal environment in advance, an envelope curve corresponding to each reference user and used for calculating a blood pressure value is fitted according to the finger data, and the envelope curves corresponding to different references are analyzed to obtain an ideal envelope curve. Wherein, the ideal environment can be understood as the environment which is not interfered by the outside and is accurate by referring to the user operation, and the finger data comprises: different pressure values to which the finger is subjected, and PPG data acquired under the action of the different pressure values. Considering that the same person may affect the magnitude of the measured blood pressure value in different seasons, the ideal envelope curves may include ideal envelope curves corresponding to different seasons, and then different seasons may also correspond to different Fn, so that different Fn may be adopted in the subsequent blood pressure measurement in different seasons to adapt to the influence of different seasons on the blood pressure measurement.
In one example, n consecutive pressure intervals may be obtained based on a uniform division from 0 to Fn, or may be obtained based on a non-uniform division from 0 to Fn.
In an example, for the blood pressure data collecting module shown in fig. 6, the force application object may be the user himself or herself, that is, the object to be measured, the electronic device may pre-store n pressure intervals, and sequentially prompt the pressure values, which should be applied by the object to be measured, within the n pressure intervals through the display interface, so that the user actively presses the measurement portion with different pressing force degrees through a finger to form the pressure values within the n pressure intervals. The data collected during the ith pressure interval may include: the pressure value within the ith pressure interval and the PPG data acquired by the PPG sensor are acquired by the pressure sensor in the blood pressure data acquisition module.
In one example, for the cuff/air bag type blood pressure data collection module shown in fig. 7, the force application object may be an electronic device itself, such as a cuff/air bag in the electronic device, and the electronic device may control inflation or deflation of the cuff/air bag, and during inflation and deflation of the cuff/air bag, a process of applying pressure to the object to be measured is formed due to pressure changes. In a specific implementation, a corresponding relationship between the inflation amount and/or the deflation amount and the pressure value may be preset, and the electronic device may obtain, according to the corresponding relationship, the magnitude of the inflation amount and/or the deflation amount of the cuff/air bag that should be controlled in order to apply the pressure value within the ith pressure interval. The data collected during the ith pressure interval may include: the pressure value within the ith pressure interval and the PPG data acquired by the PPG sensor are acquired by the pressure sensor in the blood pressure data acquisition module.
In step 302, the electronic device may determine whether the key point data used to calculate the blood pressure value is lost according to the data collection result. For example, if the data acquisition result of the ith pressure interval is that no data is acquired or data which does not meet the preset standard is acquired, it may be determined that the key point data used for calculating the blood pressure value in the ith pressure interval is lost. If the data acquisition result of the ith pressure interval is that data meeting the preset standard is acquired, it may be determined that the key point data used for calculating the blood pressure value in the ith pressure interval is not lost, and the step 305 is then performed. The preset standard can be set according to actual needs, and aims to analyze the currently acquired data to determine whether the blood pressure value can be accurately calculated according to the acquired data.
In one example, the preset criteria may include: the number of reference pressure point data collected in the ith pressure interval is greater than a preset number, wherein one pressure point data comprises: a pressure value and PPG data corresponding to the pressure value; the reference pressure point data can be pressure point data of which the PPG amplitude of the PPG data is within a preset amplitude range, and the preset amplitude range can be set according to actual needs and aims to screen out reference pressure point data of which the PPG amplitude is not too large or too small.
For example, the number of pressure point data collected in the ith pressure interval is 10, the number of reference pressure point data is 5, and if the preset number is set to 6, the data collection result of the ith pressure interval is that data which does not meet the preset standard is collected; if the preset number is set to 4, the data acquisition result of the ith pressure interval is the data which meets the preset standard. If the data acquisition result of the ith pressure interval is data which meets the preset standard, the pressure average value and the PPG amplitude average value can be calculated for 5 reference pressure point data, when envelope curve fitting is carried out, the pressure average value and the PPG amplitude average value are used as data points corresponding to the ith pressure interval, and the average pressure value can be used as the ith pressure value in the ith pressure interval. After the data points corresponding to the n pressure intervals are obtained, an envelope curve can be fitted according to the data points corresponding to the n pressure intervals.
In one example, step 302 determines whether the key point data used to calculate the blood pressure value is missing according to the data collection result, including: and under the condition that the data acquisition result is that no data is acquired or data which does not meet the preset standard is acquired, determining that key point data used for calculating the blood pressure value is lost, and determining the key pressure value as the pressure value in the ith pressure interval. That is, the pressure values within the ith pressure interval are taken as the key pressure values in the lost key point data. And under the condition that the data acquisition result is that the data is not acquired or the data which does not meet the preset standard is acquired, the ith pressure interval can be used as a re-acquisition interval, and the required key point data can be acquired in the ith pressure interval again.
In an example, if the force application object in step 303 is an object to be measured, the prompting of the force application object to apply the key pressure value may be: and displaying pressure application prompt information through the interactive interface, wherein the pressure application prompt information is used for prompting a key pressure value to be pressed by the object to be tested. The interactive interface can be displayed on a screen of the electronic equipment, and the object to be measured can apply a key pressure value to the measurement part of the object to be measured by using a finger under the indication of the pressing prompt information displayed on the interactive interface. Therefore, the pressure sensor in the electronic device can acquire the key pressure value applied by the object to be detected, and the PPG sensor can acquire PPG data corresponding to the key pressure value.
In an example, if the force application object in step 303 is an electronic device, the prompting of the force application object to apply the key pressure value may be: and controlling the cuff/air bag in the electronic equipment to inflate or deflate so that the cuff/air bag applies a key pressure value to the object to be measured. Specifically, the electronic device may determine an inflation amount or a deflation amount corresponding to the key pressure value according to the key pressure value, so as to control inflation or deflation of the cuff/air bag in the electronic device according to the determined inflation amount or deflation amount, so that the cuff/air bag applies the key pressure value to the object to be measured.
Step 304 is executed, which illustrates that the data acquisition of the (i + 1) th pressure interval is started when the key point data used for calculating the blood pressure value in the ith pressure interval is determined not to be lost based on the data acquisition result corresponding to the ith pressure interval. If the force application object is the object to be measured, the electronic device can display the numerical range of the (i + 1) th pressure interval through the interactive interface, so that the object to be measured can apply the pressure value in the (i + 1) th pressure interval to the measurement part based on the display content of the interactive interface. If the force application object is the electronic device, the electronic device can control the inflation or deflation of the cuff/air bag in the electronic device, so that the cuff/air bag applies the pressure value in the (i + 1) th pressure interval to the measurement part of the object to be measured. Furthermore, the electronic device may acquire, by using the pressure sensor, a pressure value applied to the measurement portion of the object to be measured within an (i + 1) th pressure interval and PPG data corresponding to the pressure value, determine whether key point data used for calculating the blood pressure value within the (i + 1) th pressure interval is lost according to a data acquisition result corresponding to the (i + 1) th pressure interval, and further perform the same processing according to the data acquisition result corresponding to the (i) th pressure interval. That is, the same process as that for the ith pressure zone is performed with respect to the (i + 1) th pressure zone as the ith pressure zone. And repeating the steps to obtain data acquisition results corresponding to the n pressure intervals.
In step 305, if the PPG data corresponding to the key pressure value is acquired, the data acquisition result corresponding to the i +1 th pressure interval may be acquired in the manner mentioned in step 304. If the PPG data corresponding to the key pressure value is not acquired, the force application object can be continuously prompted to apply the key pressure value. Since the prompt is given once before, the prompt can further prompt the object to be tested to adjust the test posture so as to increase the possibility that the key pressure value and the corresponding PPG data can be successfully acquired after the prompt.
In one example, after the data acquisition result corresponding to the ith pressure interval is obtained, the data acquisition result corresponding to the ith pressure interval may be notified to the object to be measured in a voice or display manner, so as to enhance the interactivity between the object to be measured and the electronic device during the process of measuring the blood pressure.
In the embodiment, in the acquisition process, the acquired data is dynamically analyzed, the key point data lost in the acquisition process is timely acquired, the finally acquired data is more complete, and finally, a complete and accurate envelope curve can be obtained through fitting according to the data acquisition results corresponding to the n pressure intervals and the acquired key point data, so that when the blood pressure value is calculated according to the complete and accurate envelope curve, the blood pressure output rate and the accuracy of the measurement result are favorably improved.
When the blood pressure data acquisition module in the electronic device is the blood pressure data acquisition module with the finger actively pressing as shown in fig. 6, this embodiment is equivalent to guiding and correcting the pressing behavior of the object to be measured, i.e., the user, in the acquisition process by dynamically analyzing the acquired data (for example, when it is determined that the key point data for calculating the blood pressure value is lost, the user may be prompted to apply a key pressure value through the interactive interface to guide and correct the pressing behavior of the user), so as to acquire complete and effective data for calculating the blood pressure value, and improve the accuracy of the measurement result of the blood pressure measurement.
When the blood pressure data acquisition module in the electronic device is the cuff/airbag type blood pressure data acquisition module as shown in fig. 7, this embodiment is equivalent to performing feedback adjustment on the electronic device in the acquisition process by dynamically analyzing the acquired data (for example, when it is determined that key point data for calculating a blood pressure value is lost, the cuff/airbag can apply a key pressure value to a measurement site of an object to be measured by controlling inflation or deflation of the cuff/airbag in the electronic device to perform feedback adjustment on the data acquisition mode of the electronic device), so as to acquire complete and effective data for calculating the blood pressure value, thereby improving the accuracy of the blood pressure measurement result.
In one embodiment, the data satisfying the preset criteria includes: the force application object applies an ith pressure value in the ith pressure interval; when i is a natural number greater than 1, determining whether the key point data used for calculating the blood pressure value is lost according to the data acquisition result in step 302, which may be implemented by a flowchart shown in fig. 9:
step 3021: determining the pressure difference value between the ith pressure value and the (i-1) th pressure value applied by the force application object in the (i-1) th pressure interval under the condition that the data acquisition result is that the data meeting the preset standard are acquired;
step 3022: if the pressure difference value is larger than the preset pressure interval, determining that key point data used for calculating the blood pressure value is lost, and determining the key pressure value as a pressure value in the complementary collection pressure interval;
in step 3021, the ith pressure interval includes a plurality of reference pressure point data, each reference pressure point data includes a reference pressure value and PPG data corresponding to the reference pressure value, and the ith pressure value may be an average value of the plurality of reference pressure values in the ith pressure interval. However, the ith pressure value may also be a median, a mode, etc. of a plurality of reference pressure values within the ith pressure interval. Wherein, the reference pressure point data has been described above, and is not described herein again to avoid repetition. Similarly, the (i-1) th pressure value may be an average, median or mode of a plurality of reference pressure values within the (i-1) th pressure interval. The electronic device may calculate a pressure difference between the ith pressure value and the (i-1) th pressure value.
In step 3022, the lower limit of the additional production pressure interval is greater than or equal to the i-1 th pressure value, and the upper limit of the additional production pressure interval is less than or equal to the i-th pressure value. The number of the key pressure values selected in the complementary mining pressure interval can be 1 or more according to actual needs. The preset pressure interval can be set according to actual needs, and aims to indicate that the pressure interval between the ith pressure value and the (i-1) th pressure value is small, so that the phenomenon that the error of a fitted envelope curve is large due to the fact that the interval between two data points is far when the envelope curve is subsequently fitted is avoided. When the pressure difference value is large, one or more pressure values can be selected between the ith-1 pressure value and the ith pressure value with large intervals as key pressure values, so that PPG data corresponding to the key pressure values are further acquired, and when the envelope curve is subsequently fitted, the acquired key data points are inserted between two far-spaced data points, so that a complete and accurate envelope curve is obtained, and the error of the fitted envelope curve is reduced.
In one example, the n pressure intervals are evenly divided based on 0 to Fn at preset pressure intervals, and Fn is a corresponding default blocking force when the blood vessel is blocked. The determination of Fn has been described above, and is not described herein again to avoid repetition. That is, if the pressure difference value is greater than a preset pressure interval based on which n pressure intervals are divided, it may be determined that the key point data is lost between the i-1 th pressure value and the i-th pressure value.
To facilitate understanding of the present embodiment, the following description is given with a specific example:
referring to fig. 10, n pressure intervals are obtained by uniformly dividing the pressure intervals from 0 to Fn by a preset pressure interval, where the n pressure intervals may be understood as n default gears, and the complementary mining or re-mining intervals may also be understood as complementary mining or re-mining gears, and the data acquisition process and the data acquisition result corresponding to the n pressure intervals are as follows:
when i is equal to 1, valid data is acquired in the stage of the 1 st pressure interval [0, F1), that is, the data acquisition result corresponding to the 1 st pressure interval [0, F1) is: collecting data meeting preset standards;
when i is 2, valid data is acquired in the stage of the 2 nd pressure interval [ F1, F2), that is, the data acquisition result corresponding to the 2 nd pressure interval [ F1, F2) is: collecting data meeting preset standards;
when i is equal to 3, valid data is acquired in the stage of the 3 rd pressure interval [ F2, F3), that is, the data acquisition result corresponding to the 3 rd pressure interval [ F2, F3) is: collecting data meeting preset standards;
the pressure difference between the pressure value (namely, the pressure value corresponding to the point A) acquired in the 2 nd pressure interval [ F1, F2) and the pressure value (namely, the pressure value corresponding to the point B) acquired in the 3 rd pressure interval [ F2, F3) is too large, and during the complementary extraction interval (namely, the complementary extraction gears [ F1 ', F2' ]), complementary extraction key point data (namely, the pressure value corresponding to the point C and the PPG amplitude value) are acquired;
when i is 4, valid data is acquired in the 4 th pressure interval [ F3, F4), that is, the data acquisition result corresponding to the 4 th pressure interval [ F3, F4) is: collecting data meeting preset standards;
when i is 5, valid data is acquired in the stage of the 5 th pressure interval [ F4, F5), that is, the data acquisition result corresponding to the 5 th pressure interval [ F4, F5) is: collecting data meeting preset standards;
when i is equal to 6, valid data is acquired in the 6 th pressure interval [ F5, F6), that is, the data acquisition result corresponding to the 6 th pressure interval [ F5, F6) is: collecting data meeting preset standards;
when i is 7, no valid data is acquired in the stage of the 7 th pressure interval [ F6, F7), that is, the data acquisition result corresponding to the 7 th pressure interval [ F6, F7) is: no data is collected; the corresponding key point data of [ F6, F7) needs to be re-acquired, and the re-acquired key point data can be the pressure value and the PPG amplitude value corresponding to the D point; at this time [ F6, F7) can be understood as a re-mining interval;
when i is equal to 8, valid data is acquired in the 8 th pressure interval [ F7, F8), that is, the data acquisition result corresponding to the 8 th pressure interval [ F7, F8) is: collecting data meeting preset standards;
when i is 9, valid data is acquired in the 9 th pressure interval [ F8, F9), that is, the data acquisition result corresponding to the 9 th pressure interval [ F8, F9) is: collecting data meeting preset standards;
when i is 10, valid data is acquired in the 10 th pressure interval [ F9, F10), that is, the data acquisition result corresponding to the 10 th pressure interval [ F9, F10) is: collecting data meeting preset standards;
the pressure difference between the pressure value (namely the pressure value corresponding to the point E) acquired in the 9 th pressure interval [ F8, F9) and the pressure value (namely the pressure value corresponding to the point F) acquired in the 10 th pressure interval [ F9, F10) is too large, and key point data (namely the pressure value corresponding to the point G and the PPG amplitude value) are acquired between the complementary acquisition intervals [ F8 ', F9' ];
and by analogy, sequentially collecting data in the n pressure intervals, and finally fitting based on the collected data to obtain an expected fitting curve, wherein the expected fitting curve is an envelope curve used for calculating the blood pressure value of the object to be measured.
In the process of collecting blood pressure data, the embodiment is equivalent to an interactive data collection scheme, data of each default gear is collected and then processed to determine whether key point data is lost, if the key point data is lost, key point data is repeatedly collected or supplemented through interaction, and if the key point data is not lost, data of the next default gear is continuously collected, so that the key point data of a fitting curve is not lost, the problem of data loss or abnormal conditions in the process of collecting blood pressure data is solved, and the blood pressure output rate and the accuracy of a measurement result are greatly improved.
Compared with the interactive acquisition scheme in the prior art, the interactive acquisition scheme has the advantages that the output rate and the accuracy of the measurement result of the blood pressure value are obviously improved, and the acquisition results of the two acquisition schemes are compared to obtain the statistical indexes shown in the table 1:
TABLE 1
In table 1, MD is the average error, SD is the standard deviation, and MAE is the average absolute error, and the smaller MAE, MD, and SD are, the better, i.e., the smaller the accuracy is. As can be seen from table 1: in combination with the MAE, the MD and the SD, the blood pressure value output rate of the interactive blood pressure data acquisition scheme is higher, and the accuracy of the measurement result is higher because the MAE, the MD and the SD are smaller.
In one embodiment, during the process of applying pressure to the object to be measured by the force application object, the blood pressure data acquisition method further comprises the following steps: and if the pressure value Fm and Fn applied to the object to be detected by the force application object are different when the vessel of the object to be detected is cut off, updating the Fn according to the pressure value applied to the object to be detected by the force application object when the vessel of the object to be detected is cut off. Considering the personalized difference of different objects to be measured and the interference of environmental factors, noise and the like in the actual blood pressure measurement process, the personalized difference of different objects to be measured can be adapted by updating the Fn, and the interference of environmental factors, noise and the like can be reduced.
In an example, the updating Fn of the pressure value applied by the force application object to the object to be measured when the blood vessel of the object to be measured is cut off may include: if the pressure value applied to the object to be detected by the force application object is within the preset truncation force range when the blood vessel of the object to be detected is truncated, the Fn is updated to be the pressure value applied to the object to be detected by the force application object when the blood vessel of the object to be detected is truncated. The preset cutoff force range can be determined based on the upper and lower limits of the cutoff force of most people, and the reasonability and the effectiveness of updating the default cutoff force Fn are favorably ensured.
In an example, the updating Fn of the pressure value applied by the force application object to the object to be measured when the blood vessel of the object to be measured is cut off may include: if the blood vessel of the object to be detected is cut off for k times within a preset time period, applying k pressure values to the object to be detected to be different from the Fn, and updating the Fn according to the characteristic values of the k pressure values; wherein k is a natural number greater than 1. The characteristic value of the k pressure values may be an average value, a median, a mode, or the like of the k pressure values. Updating Fn according to the eigenvalues of the k pressure values may be: and the Fn is updated to the characteristic values of k pressure values, so that the error update of the Fn caused by the inaccurate measurement result once every time can be avoided.
The above examples in the present embodiment are only for convenience of understanding, and do not limit the technical solutions of the present application.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
Referring to fig. 11, a chip 401 is connected to a memory 402, where the memory stores instructions for being executed by the chip, and the instructions are executed by the chip, so that the chip can execute the blood pressure data acquisition method in the foregoing embodiment.
Where memory 402 and chips 401 are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting one or more of the various circuits of chips 401 and memory 402 together. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the chip 401 is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the chip 401.
The chip 401 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 402 may be used to store data used by chip 401 in performing operations.
The embodiment of the present application further relates to an electronic device, with reference to fig. 11, including: the chip 401 described above, and a memory 402 connected to the chip 401.
The embodiment of the application also relates to a computer readable storage medium which stores a computer program. The computer program is adapted to be executed by a processor for implementing the above-described method embodiments.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice.
Claims (11)
1. A method of collecting blood pressure data, comprising:
acquiring a data acquisition result corresponding to the ith pressure interval in the process of applying pressure to the object to be detected by the force application object; wherein, the data acquisition result is data acquisition or data not acquired, and the data acquisition comprises the following steps: acquiring data meeting a preset standard or acquiring data not meeting the preset standard, wherein i is more than or equal to 1 and less than or equal to n, and n is a natural number more than 1;
determining whether key point data used for calculating the blood pressure value is lost or not according to the data acquisition result; wherein the key point data comprises: key pressure values and photoplethysmography (PPG) data corresponding to the key pressure values;
if the key point data is lost, prompting the force application object to apply the key pressure value, and acquiring PPG data corresponding to the key pressure value;
and if the key point data is not lost or PPG data corresponding to the key pressure value is acquired, acquiring a data acquisition result corresponding to the (i + 1) th pressure interval.
2. The method of claim 1, wherein said determining whether key point data used to calculate blood pressure values is missing based on the data acquisition results comprises:
and determining that key point data used for calculating the blood pressure value is lost under the condition that the data acquisition result is that no data is acquired or data which does not meet the preset standard is acquired, and determining the key pressure value as the pressure value in the ith pressure interval.
3. A method for collecting blood pressure data according to claim 1, wherein the data satisfying a preset criterion includes: the ith pressure value applied by the force application object is within the ith pressure interval;
when i is a natural number greater than 1, determining whether key point data used for calculating a blood pressure value is lost according to the data acquisition result, including:
under the condition that the data acquisition result is that the data meeting the preset standard is acquired, determining the pressure difference value between the ith pressure value and the ith-1 pressure value applied by the force application object and positioned in the ith-1 pressure interval;
if the pressure difference value is larger than a preset pressure interval, determining that key point data used for calculating the blood pressure value is lost, and determining the key pressure value as a pressure value in a complementary collection pressure interval; wherein the lower limit value of the supplementary mining pressure interval is greater than or equal to the ith-1 pressure value, and the upper limit value of the supplementary mining pressure interval is less than or equal to the ith pressure value.
4. A method as claimed in claim 3, wherein n pressure intervals are obtained by dividing the pressure intervals uniformly at the predetermined pressure intervals on the basis of 0 to Fn, and Fn is a default blocking force corresponding to the occurrence of the vascular block.
5. A method for collecting blood pressure data according to claim 1, wherein n pressure intervals are obtained by dividing the pressure intervals from 0 to Fn, and Fn is a default blocking force corresponding to the occurrence of vascular blocking.
6. The method according to claim 4 or 5, wherein during the process of applying pressure to the subject, the method further comprises:
if the pressure value Fm applied to the object to be detected by the force application object is different from the pressure value Fn when the vessel of the object to be detected is cut off, updating the pressure value Fn applied to the object to be detected by the force application object according to the pressure value Fm applied to the object to be detected by the force application object when the vessel of the object to be detected is cut off.
7. The method according to claim 6, wherein the updating of the Fn with the pressure value applied by the force application object to the subject when the blood vessel of the subject is cut off includes:
if the pressure value applied by the force application object to the object to be detected is within the preset truncation force range when the blood vessel of the object to be detected is truncated, the Fn is updated to the pressure value applied by the force application object to the object to be detected when the blood vessel of the object to be detected is truncated.
8. The method according to any one of claims 1 to 5, wherein the prompting the force application object to apply the key pressure value in a case where the force application object is the object to be measured includes:
displaying pressing prompt information through an interactive interface of the electronic equipment, wherein the pressing prompt information is used for prompting the key pressure value to be pressed by the object to be tested;
when the force application object is the electronic device, the prompting the force application object to apply the key pressure value includes:
and controlling the cuff/air bag in the electronic equipment to inflate or deflate so that the cuff/air bag applies the key pressure value to the object to be tested.
9. A chip, wherein the chip is connected to a memory, wherein the memory stores instructions for execution by the chip, and wherein the instructions are executed by the chip to enable the chip to perform the blood pressure data collection method according to any one of claims 1 to 8.
10. An electronic device, comprising: the chip of claim 9, and a memory coupled to the chip.
11. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, is adapted to carry out a method of blood pressure data acquisition according to any one of claims 1 to 8.
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