Method and device for simulating blood pressure measurement based on mercury sphygmomanometer

Abstract

The invention belongs to the field of simulated blood pressure measurement, and particularly relates to a method and device for performing simulated blood pressure measurement based on a mercury sphygmomanometer. According to the method, after the collected original pressure value is corrected to obtain the overall pressure value, the corresponding relation between the blood pressure values divided at equal intervals and the overall pressure value is established, the mercury sphygmomanometer to be used is calibrated according to the corresponding relation, the simulated blood pressure is measured through the calibrated mercury sphygmomanometer, and the accuracy of blood pressure measurement is improved. Therefore, the simulated blood pressure measurement by using the mercury sphygmomanometer once is completed. Simulated blood pressure data measured through the method are accurate, simulated blood pressure measurement errors caused by the difference of cuffs of mercury sphygmomanometers of different manufacturers and different models are avoided, and the real experience feeling of blood pressure measurement can be brought to medical students.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of simulating blood pressure measurement, and particularly relates to a method and device for simulating blood pressure measurement based on a mercury sphygmomanometer. BACKGROUND

[0002] In current medical education and clinical practice, blood pressure measurement is a basic and important skill. For medical students in the early training or learning stage, a large number of simulated blood pressure measurement exercises are needed to accurately master the skill of blood pressure measurement and reduce blood pressure measurement errors. At present, medical students usually place a simulated sphygmomanometer or a real sphygmomanometer after modification on a simulation model to measure simulated blood pressure. When the above method is used to measure simulated blood pressure, the following defects exist: 1. Medical students cannot experience the real feeling of using a real sphygmomanometer to measure blood pressure; 2. The wearing of the cuff cannot be guaranteed to be consistent every time simulated blood pressure measurement is performed, thereby affecting the accuracy of simulated blood pressure measurement. SUMMARY

[0003] The purpose of the present application is to solve the above technical problems and provide a method and device for simulating blood pressure measurement based on a mercury sphygmomanometer to improve the operation experience of medical students and the accuracy of simulated blood pressure measurement. The present application is realized by the following scheme: A method for simulating blood pressure measurement based on a mercury sphygmomanometer, the specific steps are as follows: S1, establishing a corresponding relationship between blood pressure values and overall pressure values and pre-storing them in a master control unit, the specific steps are as follows: S11, dividing blood pressure values into multiple segments at equal intervals, and obtaining the original pressure values collected by each pressure sensor corresponding to each segment of blood pressure values; S12, performing correction calculation on the original pressure values collected by each pressure sensor obtained for each segment of blood pressure values to obtain the overall pressure value corresponding to the segment of blood pressure values; S13, pre-storing the corresponding relationship between each segment of blood pressure values and overall pressure values obtained in step S12 in the master control unit; S2, calibrating the mercury sphygmomanometer to be used according to the corresponding relationship between blood pressure values and overall pressure values determined in step S1; S3, measuring simulated blood pressure using the calibrated mercury sphygmomanometer, the specific steps are as follows: S31, judging whether the wearing position of the mercury sphygmomanometer cuff is correct, if correct, entering step S32, if incorrect, adjusting to be correct and then entering step S32; S32, after determining that the cuff position is correct, inflating the cuff to 200mmHg or above, slowly deflating after the mercury column is stable, each pressure sensor real-time collection pressure value, according to the step S12 to obtain the original pressure value of each pressure sensor collected by the correction calculation, get the corrected real-time overall pressure value; S33, determine whether the corrected real-time overall pressure value is located between the overall pressure value corresponding to the two adjacent blood pressure values pre-stored in the host unit, if yes, calculate the real-time blood pressure value B P ; , Wherein, B P is the real-time measured blood pressure value, m is the blood pressure value interval value, m=0, 1, ……8, P is the corrected real-time overall pressure value, P adj(20*m) is the corrected overall pressure value corresponding to the m blood pressure value interval, P adj(20*(m+1)) is the corrected overall pressure value corresponding to the m+1 blood pressure value interval; If not, make further judgment, if the measured real-time overall pressure value is greater than the overall pressure value corresponding to the highest blood pressure value pre-stored in the host unit, return to step S32 to continue slowly deflating the cuff until the obtained real-time overall pressure is located between the overall pressure values corresponding to the two adjacent blood pressure values pre-stored in the host unit; S34, determine whether the blood pressure value B P calculated by step S33 is located between the diastolic pressure and systolic pressure issued to the analog arm by the host computer, if yes, continue to slowly deflate the cuff, the host unit controls the speaker to emit the corresponding Korotkoff sound according to the different blood pressure segments divided by the diastolic pressure and systolic pressure, and the measurement of the simulated blood pressure is completed according to the appearance and disappearance of the Korotkoff sound; If not, continue to slowly deflate until the real-time blood pressure value B P calculated by step S33 is located between the diastolic pressure and systolic pressure issued to the analog arm by the host computer.

[0004] Further, the specific steps of step S12 are as follows: S121, obtain the original pressure value of each pressure sensor, sort the obtained original pressure value in order from small to large, obtain the large side pressure value and the small side pressure value, and obtain the pressure difference value from the large side pressure value and the small side pressure value; S122, obtain the compensation value of the small side pressure value according to the pressure difference value; S123, determine the effective proportion of the original pressure value collected by each pressure sensor in the original overall pressure value; S124, according to the value obtained in steps S121-S123 for compensating the smaller side pressure value and the effective proportion of the original pressure value collected by each pressure sensor in the original overall pressure value, the corrected overall pressure value is calculated according to the following formula: , Wherein, P adj is the corrected overall pressure value corresponding to the blood pressure value, P b is the compensation value for the smaller side pressure value, is the average value of the original pressure value collected by each pressure sensor, W i is the effective proportion of the original pressure value collected by each pressure sensor in the original overall pressure value, P i is the original pressure value collected by each pressure sensor, and n is the number of sensors.

[0005] Further, the specific steps for obtaining the compensation value for the smaller side pressure value in step S122 are as follows: S1221, according to the pressure difference value obtained in step S121, the pressure difference value of the smaller side is obtained, that is, the influence degree of the inflation area is determined, and the compensation value for the smaller side is determined according to the pressure difference value and the pressure difference value ratio, and the calculation formula is: , Wherein, P b is the compensation value for the smaller side pressure value, P d is the pressure difference value of the larger side and the smaller side, and r d is the pressure difference value ratio.

[0006] Further, the steps for determining the effective proportion of the original pressure value collected by each pressure sensor in the original overall pressure value in step S123 are as follows: S1231, according to the original pressure value collected by each pressure sensor, the absolute deviation of the original pressure value collected by each pressure sensor is calculated, and the calculation formula is as follows: , Wherein, d i is the absolute deviation of the original pressure value collected by each pressure sensor, is the average value of the original pressure value collected by each pressure sensor, P i is the original pressure value collected by each pressure sensor.

[0007] S1232, after obtaining the absolute deviation of the original pressure value collected by each pressure sensor, the deviation degree of the original pressure value collected by each pressure sensor in the original overall pressure value can be obtained according to the following formula: , r i is the proportion of the absolute deviation of each pressure value in the overall deviation, which reflects the deviation degree of each collected original pressure value, d i is the absolute deviation of the original pressure value collected by each pressure sensor, d sum is the sum of the absolute deviations of the original pressure values collected by each pressure sensor; S1233, after obtaining the deviation degree of the original pressure value collected by each pressure sensor in step S1232, the effective proportion w of the original pressure value collected by each pressure sensor in the original overall pressure value is obtained i , , wherein w i is the effective proportion of the original pressure value collected by each pressure sensor in the original overall pressure value.

[0008] Further, step 2 includes the following steps: S21, judging whether the placement position of the mercury sphygmomanometer cuff is correct, if correct, entering step S22, if not, adjusting the cuff position to be correct and then entering step S22; S22, inflating the cuff to above 200mmHg, and after the mercury column is stable, slowly deflating to each segmented point blood pressure value, judging whether the overall pressure value obtained by correcting the original pressure value collected by each pressure sensor is consistent with the overall pressure value corresponding to the blood pressure value in the corresponding relationship between the blood pressure value and the overall pressure value pre-stored in the master control unit at the blood pressure value, if consistent, completing the calibration of the mercury sphygmomanometer to be used, if not consistent, adjusting the position and tightness of the cuff and performing re-measurement and judgment until consistent.

[0009] A simulated blood pressure measuring device for implementing any one of the above-mentioned methods of simulating blood pressure measurement based on a mercury sphygmomanometer, the simulated blood pressure measuring device comprising a simulated arm, a mercury sphygmomanometer and an upper computer, wherein the simulated arm comprises a simulated arm body, and a first photosensitive detection element and a second photosensitive detection element arranged inside the simulated arm body, for detecting whether the placement position of the mercury sphygmomanometer cuff is correct; and a plurality of pressure sensors arranged around the simulated arm body, wherein the pressure sensors are used to collect the original pressure values of the simulated arm in the process of inflating and / or deflating the mercury sphygmomanometer cuff in the blood pressure range of 0-180mmHg, and transmit the original pressure values to the master control unit; And the main control unit is arranged in the simulation arm body, the main control unit includes a storage unit, the storage unit is pre-stored with a correction algorithm, the correction algorithm is used for correcting the original pressure value collected by the pressure sensor to obtain the corrected overall pressure value; and the data of the corresponding relationship between each blood pressure value and the overall pressure value is pre-stored; The judgment unit is used for judging whether the obtained overall pressure value is consistent with the overall pressure value corresponding to a certain blood pressure value in the blood pressure value-overall pressure value corresponding relationship data pre-stored in the storage unit when the mercury sphygmomanometer to be measured is calibrated, and whether the obtained real-time overall pressure value is located between the overall pressure values corresponding to two adjacent blood pressure values in the blood pressure value-overall pressure value corresponding relationship data pre-stored in the storage unit when the simulated blood pressure is measured. The control unit is used for controlling the speaker to emit different Korotkoff sounds in the diastolic pressure and systolic pressure range when the simulated blood pressure is measured in real time. And the mercury sphygmomanometer is used for pressing each pressure sensor on the simulation arm to achieve the corresponding blood pressure value.

[0010] Further, the first light-sensitive detection element is arranged 3 cm above the elbow of the simulation arm body, and the second light-sensitive detection element is arranged 24 cm above the elbow of the simulation arm body.

[0011] Further, the pressure sensor is arranged in any number of 4, 6 or 8, and is arranged between the two light-sensitive detection elements in a way of surrounding the simulation arm body.

[0012] Further, the pressure sensor is arranged in a groove on the simulation arm body and is fixed to the simulation arm body by a screw, and an elastic pressing element connected by screw threads is arranged outside the pressure sensor.

[0013] Further, the simulation arterial blood vessel and the air pump are arranged, the simulation arterial blood vessel is connected with the air pump pipeline, and the air pump is electrically connected with the control unit.

[0014] The beneficial effects of the present application are as follows: the present application applies pressure to each pressure sensor provided on the simulated arm by using the cuff of a real mercury sphygmomanometer, and corrects and calculates the original pressure values ​​collected by each pressure sensor through a correction algorithm to obtain the overall pressure value applied by the cuff on each pressure sensor, and calculates the simulated blood pressure using the corrected overall pressure value. The simulated blood pressure measured by this method avoids the problem of excessive measurement error caused by changes in the tightness of the cuff; furthermore, this measurement method can correct the measurement deviation caused by different cuff sizes or inflation areas of different models of mercury sphygmomanometers, so that the present simulated blood pressure measurement device can be applied to any model of mercury sphygmomanometer for measuring simulated blood pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall process of this application; Figure 2 A flow chart for establishing the corresponding relationship between blood pressure value and overall pressure value; Figure 3 A schematic diagram of a process for correcting the pressure value collected by the pressure sensor; Figure 4 A flow chart for determining the effective ratio of the raw pressure values ​​collected by each pressure sensor; Figure 5 This is a schematic diagram of the specific process of simulating blood pressure measurement; Figure 6 Schematic diagram of the cuff's inflatable area located at various pressure sensor positions; Figure 7 This is a schematic diagram of the structure of a simulated blood pressure measurement device; Figure 8 This is a schematic diagram of the simulated arm structure; Figure 9 Schematic diagram of the pressure sensor fixing structure. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the relationship between the technical problem, technical solution and technical effect to be achieved in this application, a detailed description is given below in conjunction with specific embodiments.

[0017] In this embodiment, a method for simulated blood pressure measurement based on a mercury sphygmomanometer is applied to a simulated arm, a mercury sphygmomanometer, and a host computer, wherein the mercury sphygmomanometer is any model available on the market.

[0018] A method for simulating blood pressure measurement based on a mercury sphygmomanometer, the specific steps are as follows: combining Figures 1-5 As shown, S1. Establish the corresponding relationship between the blood pressure value and the overall pressure value, and pre-store it in the main control unit. The specific steps are as follows: S11, dividing the blood pressure value into multiple segments at equal intervals, and obtaining the initial pressure values ​​collected by each pressure sensor corresponding to each segment of the blood pressure value; The specific implementation method of step S11 is to place the cuff of the mercury sphygmomanometer on the position of the pressure sensor of the simulated arm, and use the photosensitive detection element to detect whether the cuff is worn in the correct position. When the resistance value of the photosensitive detection element is in a changing state, it can be considered that the cuff is worn in the correct position. Then inflate the cuff to above 200 mmHg. After the mercury column stabilizes, slowly deflate the cuff. After the height of the mercury column drops to 180 mmHg, start recording the original pressure values ​​collected by each pressure sensor corresponding to each blood pressure value segment every time it drops by 20 mmHg.

[0019] After obtaining the raw pressure values ​​collected by each pressure sensor at each blood pressure range, these raw pressure values ​​need to be corrected. This embodiment uses the raw pressure values ​​collected by four pressure sensors at a mercury column height of 120 mmHg (i.e., a blood pressure value of 120) as an example to explain in detail how to correct these raw pressure values. The correction steps for six or eight pressure sensors are the same as for four.

[0020] Enter step S12 to correct the original pressure values ​​collected by each pressure sensor. The specific correction steps are as follows: S121, obtaining raw pressure values ​​from each pressure sensor, sorting the obtained raw pressure values ​​in ascending order, obtaining a large-side pressure value and a small-side pressure value, and obtaining a pressure difference value from the large-side pressure value and the small-side pressure value; When the cuff is inflated, the inflatable area of ​​the cuff generally cannot surround the arm for a week, and there is an area that cannot be inflated. The original pressure values ​​collected by each pressure sensor are different. The collected original pressure values ​​are sorted in order from small to large and recorded as P 1 ＜ P 2 ＜ P 3 ＜ P 4， The two larger pressure values ​​are taken as the original pressure values ​​collected by the pressure sensor in the inflatable area of ​​the cuff, and recorded as the larger side. The two smaller pressure values ​​are taken as the original pressure values ​​collected by the pressure sensor in the cuff affected by the non-inflatable area, and recorded as the smaller side. The pressure difference between the larger side and the smaller side is taken as the pressure value that the inflatable area of ​​the cuff provides to the pressure sensor less than the inflatable area. This value is recorded as the pressure difference and is calculated by the following formula: , Among them, P d is the pressure difference, and P1, P2, P3, and P4 are the original pressure values ​​collected by each pressure sensor.

[0021] The pressure difference value P d The size is mainly affected by the size of the sleeve inflation area, and the size of the inflation area is determined by the tightness of the sleeve. The wider the sleeve, the larger the inflation area, the smaller the pressure on the smaller side. In order to obtain the same blood pressure value, more air needs to be filled into the sleeve. The more inflated the inflation area, the greater the pressure on the larger side, and the greater the pressure difference between the larger side and the smaller side. On the contrary, the tighter the sleeve, the smaller the pressure difference between the larger side and the smaller side.

[0022] In order to eliminate the influence of the tightness of the sleeve on the simulated blood pressure measurement, the pressure value on the smaller side needs to be compensated to adjust the pressure value collected at different tightness to the value shown at the same tightness. Enter step S122 to obtain the pressure compensation value of the smaller side. The specific steps are as follows: S1221, according to the pressure difference value obtained in step S121, the pressure difference ratio of the smaller side is obtained, that is, the influence degree of the inflation area is determined, and the compensation value of the smaller side is determined according to the pressure difference value and the pressure difference ratio, which is calculated by the following formula: , Among them, P b is the compensation value of the smaller side, P d is the pressure difference between the larger side and the smaller side, and r d is the pressure difference ratio.

[0023] In this embodiment, the pressure difference ratio r d is calculated by the proportion of the pressure difference on the larger side. This pressure difference ratio can evaluate the influence of the inflation area on the overall pressure value collected by the pressure sensor. It is obtained by the following calculation formula: , Among them, r d is the pressure difference ratio, P d is the pressure difference between the larger side and the smaller side, and P3, P4 are the original pressure values collected by the inflatable area pressure sensor, that is, the original pressure values of the larger side.

[0024] Furthermore, after inflating the sleeve, the sleeve does not deform uniformly, and the original pressure values collected by each pressure sensor arranged on the simulated arm are different. In order to obtain accurate simulated blood pressure, the influence degree of each original pressure value collected by the pressure sensor in the overall pressure value needs to be determined, that is, the effective proportion of each original pressure value is determined.

[0025] Enter step S123 to determine the effective proportion of the original pressure value collected by each pressure sensor in the original overall pressure value. The specific steps are as follows: S1231, the absolute deviation of the raw pressure value collected by each pressure sensor is calculated according to the raw pressure value collected by each pressure sensor, and the calculation formula is as follows: , Wherein, d i is the absolute deviation of the raw pressure value collected by each pressure sensor, is the average value of the raw pressure value collected by each pressure sensor, P i is the raw pressure value collected by each pressure sensor.

[0026] S1232, after obtaining the absolute deviation of the raw pressure value collected by each pressure sensor, the deviation degree of the raw pressure value collected by each pressure sensor in the raw overall pressure value can be obtained according to the following formula; The calculation formula is as follows: , r i is the proportion of the absolute deviation of each pressure value in the overall deviation, which reflects the deviation degree of each collected raw pressure value, d i is the absolute deviation of the raw pressure value collected by each pressure sensor, d sum is the sum of the absolute deviation of the raw pressure value collected by each pressure sensor; S1233, after obtaining the deviation degree of the raw pressure value collected by each pressure sensor in step S1232, the greater the deviation degree, the less the effective proportion of the value in the raw overall pressure calculation, on the contrary, so set the effective proportion W i of the raw pressure value collected by the pressure sensor in the raw overall pressure value, the greater the deviation degree, the less the effective proportion of the value in the raw overall pressure calculation, on the contrary, so set the effective proportion W i of the raw pressure value collected by the pressure sensor in the raw overall pressure value, the greater the deviation degree, the less the effective proportion of the value in the raw overall pressure calculation, on the contrary, so set the effective proportion W , Wherein, W i is the effective proportion of the raw pressure value collected by each pressure sensor in the raw overall pressure value.

[0027] After steps S121-S123, the compensation value of the raw pressure value on the small side and the effective proportion of each raw pressure value in the raw overall pressure value are determined, step S124 is entered to obtain the corrected overall pressure value, so as to obtain the overall pressure value corresponding to the blood pressure value of 120, and the calculation formula is as follows: , Wherein, P adj is the corrected overall pressure value corresponding to the blood pressure value, P b is the compensation value of the small side pressure value, is the average value of the raw pressure value collected by each pressure sensor, Wi P is the effective ratio of the original pressure value collected by each pressure sensor in the original overall pressure value. i is the original pressure value collected by each pressure sensor, and n is the number of sensors.

[0028] Step S13 obtains data on the corresponding relationship between the blood pressure values ​​divided into 20 mmHg intervals between 0-180 mmHg and the overall pressure value according to the above correction method steps, and pre-stores the data in the main control unit.

[0029] In some embodiments, the blood pressure value within the range of 0-180 mmHg can be divided into intervals of 10 mmHg or 30 mmHg, and then the corresponding relationship between the blood pressure value of each segment and the overall pressure value is obtained through the method of step S12.

[0030] Furthermore, in order to ensure that the inflatable area of ​​the cuff is at any position, the original pressure values ​​collected by each pressure sensor are corrected through step S12, and based on the correspondence between each segmented blood pressure value and the overall pressure value pre-stored in the main control unit, the overall pressure value collected in real time can be used to measure an accurate blood pressure value. Therefore, in this embodiment, by collecting the overall pressure values ​​of the cuff at different positions, and calculating the relative standard deviation of the original overall pressure values ​​and the corrected overall pressure values ​​of multiple groups of data, it is used to evaluate the accuracy of the blood pressure value measured after the original pressure value is corrected in step S12. The calculation formula of the relative standard deviation of the original overall pressure value is: , in, is the original overall pressure value collected when the cuff's inflatable area is located on different pressure sensors, is the average of the raw overall pressure values.

[0031] The calculation formula for the relative standard deviation of the corrected overall pressure value is: , in, is the corrected overall pressure value collected when the cuff's inflatable area is located on different pressure sensors, It is the average value of the corrected overall pressure value.

[0032] The specific method is, Figure 6As shown, at the same blood pressure value, the inflatable area of the cuff is placed right above the different pressure sensors and at the junction of the two pressure sensors, and the raw pressure values collected by each pressure sensor when the inflatable area of the cuff is at different positions are collected, the raw overall pressure values and the corrected overall pressure values are calculated from the collected raw pressure values, and the relative standard deviation of the obtained raw overall pressure values and corrected overall pressure values is calculated to determine the correlation between the blood pressure value calculated from the raw pressure data processed in step S12 and the overall pressure value.

[0033] In this embodiment, the raw pressure values of each pressure sensor are recorded when the inflatable area of the cuff is at different positions at blood pressure values of 20 mmHg, 40 mmHg, 60 mmHg, 80 mmHg, 100 mmHg, 120 mmHg, 140 mmHg, 160 mmHg, and 180 mmHg, respectively, to obtain the raw overall pressure values and the corrected overall pressure values after step S12, and the experimental data is as follows: Table 1 Pressure values at 20 mmHg

[0034] The relative standard deviation of the raw overall pressure data at 20 mmHg is 11.62%; The relative standard deviation of the corrected overall pressure data at 20 mmHg is 1.95%; Table 2 Pressure values at 40 mmHg

[0035] The relative standard deviation of the raw overall pressure data at 40 mmHg is 11.02%; The relative standard deviation of the corrected overall pressure data at 40 mmHg is 1.90%; Table 3 Pressure values at 60 mmHg

[0036] The relative standard deviation of the raw overall pressure data at 60 mmHg is 8.52%; The relative standard deviation of the corrected overall pressure data at 60 mmHg is 1.89%; Table 4 Pressure values at 80 mmHg

[0037] The relative standard deviation of the raw overall pressure data at 80 mmHg is 7.33%; The relative standard deviation of the corrected overall pressure data at 80 mmHg is 1.83%; Table 5 Pressure values at 100 mmHg

[0038] Relative standard deviation of raw overall pressure data at 100 mmHg = 6.04%; Relative standard deviation of corrected overall pressure data at 100 mmHg = 1.76%; Table 6 Pressure values at 120 mmHg

[0039] Relative standard deviation of raw overall pressure data at 120 mmHg = 5.30%; Relative standard deviation of corrected overall pressure data at 120 mmHg = 1.61%; Table 7 Pressure values at 140 mmHg

[0040] Relative standard deviation of raw overall pressure data at 140 mmHg = 4.45%; Relative standard deviation of corrected overall pressure data at 140 mmHg = 1.26%; Table 8 Pressure values at 160 mmHg

[0041] Relative standard deviation of raw overall pressure data at 160 mmHg = 3.99%; Relative standard deviation of corrected overall pressure data at 160 mmHg = 1.16%; Table 9 Pressure values at 180 mmHg

[0042] Relative standard deviation of raw overall pressure data at 180 mmHg = 2.98%; Relative standard deviation of corrected overall pressure data at 180 mmHg = 0.59%.

[0043] From the above experimental data, the relative standard deviation of the original overall pressure value is large when the inflatable area of the cuff is located at different pressure sensor positions, that is, it cannot meet the correlation of the overall pressure value obtained when the inflatable area of the cuff is located at any position and the corresponding relationship of the blood pressure value, which affects the accuracy of the simulated blood pressure measurement in the subsequent simulated blood pressure measurement. The relative standard deviation of the modified overall pressure value obtained after the original pressure value is modified in step S12 is small, which can meet the correlation of the overall pressure value obtained when the inflatable area of the cuff is located at any position and the corresponding relationship of the blood pressure value, which can ensure the accuracy of the simulated blood pressure measurement in the subsequent simulated blood pressure measurement.

[0044] When performing simulated blood pressure measurement, the mercury sphygmomanometer to be used needs to be calibrated to eliminate the influence of the difference of the inflatable area of the cuff on the measurement accuracy of the simulated blood pressure due to different models or manufacturers of the mercury sphygmomanometer. That is, step S2 is entered, and the corresponding relationship between the blood pressure value and the overall pressure value determined in step S1 is used to calibrate the real mercury sphygmomanometer to be used; the specific calibration method is to place the cuff of the mercury sphygmomanometer to be used at the blood pressure measurement position of the simulated arm, and determine whether the cuff is placed correctly by the photosensitive detection element. If it is correct, the next step is performed, if it is not correct, the cuff is adjusted to the correct position, and the cuff is inflated to above 200mmHg. After the mercury column is stable, it is slowly deflated to 180mmHg, 160mmHg, 140mmHg, 120mmHg, 100mmHg, 80mmHg, 60mmHg, 40mmHg, and 20mmHg. At this time, it is determined whether the modified overall pressure value corresponding to the blood pressure value is consistent with the overall pressure value corresponding to the blood pressure value in the corresponding relationship data between the blood pressure value and the overall pressure value pre-stored in the main control unit. If it is consistent, the calibration of the mercury sphygmomanometer to be used is completed. If it is not consistent, the tightness of the cuff is adjusted, and the measurement is re-performed until the overall pressure value obtained matches the corresponding relationship between the blood pressure value and the overall pressure value pre-stored in the main control unit, that is, the calibration of the mercury sphygmomanometer to be measured is completed.

[0045] After the calibration of the mercury sphygmomanometer to be used is completed, step S3 is entered to perform simulated blood pressure measurement, and the specific steps are as follows: S31 determines whether the mercury sphygmomanometer cuff is placed correctly. If it is correct, step S32 is entered, if it is not correct, the position of the cuff is adjusted to be correct and then step S32 is entered. The specific method for determining whether the cuff position is correct is as follows: the cuff of the mercury sphygmomanometer is placed at the blood pressure measurement position of the simulated arm, and it is observed whether the resistance value of the photosensitive detection element is in a changing state. If it is, the cuff position is correct, if it is not, the cuff position is adjusted until the resistance value of the photosensitive detection element is in a changing state, and the correct wearing of the cuff is completed.

[0046] S32, after determining that the cuff position is correct, inflating the cuff to above 200mmHg, slowly deflating after the mercury column is stable, each pressure sensor real-time collection of raw pressure values, according to the method of correcting the obtained raw pressure values in step S12, to obtain the corrected real-time overall pressure value; S33, judging whether the corrected real-time overall pressure value is located between the overall pressure values corresponding to two adjacent blood pressure values pre-stored in the host unit, if yes, calculating the real-time blood pressure value B P with the following formula; , Wherein, B P is the real-time measured blood pressure value, m is the blood pressure value interval value, m=0, 1, ……8, P is the corrected real-time overall pressure value, P adj（20*m） is the corrected overall pressure value corresponding to the m blood pressure value interval, P adj(20*(m+1)） is the corrected overall pressure value corresponding to the m+1 blood pressure value interval; If not, further judgment, if the measured real-time overall pressure value is greater than the overall pressure value corresponding to the highest blood pressure value pre-stored in the host unit, return to step S32 to continue slowly deflating the cuff, until the obtained real-time overall pressure is located between the overall pressure values corresponding to two adjacent blood pressure values pre-stored in the host unit, if the measured real-time overall pressure value is less than the overall pressure value corresponding to the lowest blood pressure value pre-stored in the host unit, return to step S32; Enter step S34, judging whether the blood pressure value B P calculated by step S33 is located between the diastolic pressure and systolic pressure issued by the host computer to the simulated arm, if yes, continue to slowly deflate the cuff, the host unit controls the speaker to issue the corresponding Korotkoff sound according to the different blood pressure segments divided by the diastolic pressure and systolic pressure, and the measurement of simulated blood pressure is completed according to the appearance and disappearance of the Korotkoff sound; If not, continue to slowly deflate until the blood pressure value B P calculated by step S33 is located between the diastolic pressure and systolic pressure issued by the host computer to the simulated arm.

[0047] A simulated blood pressure measurement device, as shown in Figure 7 , for realizing any of the above-mentioned simulated blood pressure measurement methods, the simulated blood pressure measurement device comprises a simulated arm, a mercury sphygmomanometer and a host computer. As Figure 8As shown, the simulated arm includes a simulated arm body 1, and a first light-sensitive detection element and a second light-sensitive detection element arranged on the simulated arm body, the first light-sensitive detection element 13 is arranged 3 cm above the elbow of the simulated arm body, and the second light-sensitive detection element 14 is arranged 24 cm above the elbow of the simulated arm body, for limiting the wearing position of the cuff and judging whether the wearing position of the cuff is correct. A plurality of pressure sensors 2 are arranged around the simulated arm body, specifically, the pressure sensors are arranged in a manner of surrounding the simulated arm body once between the two light-sensitive detection elements, the pressure sensors are used to collect the original pressure values of the simulated arm in the process of inflating and / or deflating the mercury sphygmomanometer cuff in the blood pressure range of 0-180 mmHg, and transmit to the master control unit.

[0048] Further, the pressure sensors can be 4, 6 or 8, such as Figure 9 As shown, the pressure sensors 2 are arranged in the grooves 12 on the simulated arm body, and are fixed on the simulated arm body 1 by screws, and the elastic pressing members 11 are fixed on the pressure sensors 2 by screws, and this fixing manner ensures that the pressure sensors are uniformly stressed.

[0049] and a master control unit, the master control unit includes a storage unit, a judgment unit and a control unit, wherein the storage unit pre-stores an algorithm formula for correcting the original pressure values collected by each pressure sensor, an algorithm formula for calculating the real-time blood pressure value by correcting the overall pressure value during simulated blood pressure measurement, and data of the corresponding relationship between each blood pressure value and the overall pressure value; The judgment unit is used to judge whether the corrected overall pressure value obtained at a certain blood pressure value is consistent with the overall pressure value corresponding to the certain blood pressure value in the blood pressure value-overall pressure value corresponding relationship data pre-stored in the storage unit during calibration of the to-be-tested mercury sphygmomanometer; and the judgment unit is also used to judge whether the corrected real-time overall pressure value is located between the overall pressure values corresponding to two adjacent blood pressure values in the blood pressure value-overall pressure value corresponding relationship data pre-stored in the storage unit during simulated blood pressure measurement. The control unit is used to control the loudspeaker to emit different Korotkoff sounds between diastolic pressure and systolic pressure during real-time measurement of simulated blood pressure.

[0050] In some embodiments, it further includes a simulated arterial blood vessel (not shown in the figure) and an air pump 15, the simulated arterial blood vessel and the air pump 15 are connected by pipelines, the air pump is electrically connected with the control unit, and the control unit controls the air pump to intermittently inflate the simulated arterial blood vessel to simulate the pulse beat during blood pressure measurement.

Claims

1. A method for simulating blood pressure measurement based on a mercury sphygmomanometer, characterized in that: The specific implementation steps are as follows: S1. Establish the corresponding relationship between the blood pressure value and the overall pressure value, and pre-store it in the main control unit. The specific steps are as follows: S11, dividing the blood pressure value into multiple segments at equal intervals, and obtaining the original pressure values ​​collected by each pressure sensor corresponding to each blood pressure segment; S12, performing correction calculation on the original pressure values ​​collected by each pressure sensor for each blood pressure value segment to obtain an overall pressure value corresponding to the blood pressure value segment; S13, pre-storing the corresponding relationship between each blood pressure value and the overall pressure value obtained in step S12 into the main control unit; S2. Calibrate the mercury sphygmomanometer to be used based on the correspondence between the blood pressure value and the overall pressure value determined in step S1; S3. Use a calibrated mercury sphygmomanometer to measure simulated blood pressure. The specific steps are as follows: S31, determine whether the mercury sphygmomanometer cuff is correctly placed, if it is correct, proceed to step S32, if not, adjust the cuff to the correct position and proceed to step S32; S32. After confirming that the cuff is correctly positioned, inflate the cuff to above 200 mmHg, and slowly deflate it after the mercury column stabilizes. Each pressure sensor collects pressure values ​​in real time, and the original pressure values ​​collected by each pressure sensor obtained in step S12 are corrected and calculated to obtain a corrected real-time overall pressure value. S33, determine whether the corrected real-time overall pressure value is between the overall pressure values ​​corresponding to two adjacent blood pressure values ​​pre-stored in the main control unit. If so, calculate the real-time blood pressure value using the following formula: ; ， Among them, B P is the measured real-time blood pressure value, m is the blood pressure interval value, m=0,1...8, P is the corrected real-time overall pressure value, P adj（20*m） is the corrected overall pressure value corresponding to the mth blood pressure interval, P adj(20*(m+1)） is the corrected overall pressure value corresponding to the m+1th blood pressure value interval; If not, further determination is made. If the measured real-time overall pressure value is greater than the overall pressure value corresponding to the highest blood pressure value preset in the main control unit, the process returns to step S32 to continue slowly deflation of the cuff until the obtained real-time overall pressure is between the overall pressure values ​​corresponding to two adjacent blood pressure values ​​pre-stored in the main control unit. S34: Determine the real-time blood pressure value calculated in step S33 Is it between the diastolic and systolic pressures sent to the simulated arm by the host computer? If so, the cuff continues to slowly deflate. The main control unit controls the speaker to emit Korotkoff sounds corresponding to different blood pressure segments divided equally between the diastolic and systolic pressures. The simulated blood pressure measurement is completed based on the appearance and disappearance of the Korotkoff sounds. If not, continue to slowly deflate until the blood pressure value calculated in step S33 is It is between the diastolic and systolic blood pressures sent from the host computer to the simulated arm.

2. The method for simulating blood pressure measurement based on a mercury sphygmomanometer according to claim 1, characterized in that: The specific steps for implementing step S12 are as follows: S121, obtaining raw pressure values ​​from each pressure sensor, sorting the obtained raw pressure values ​​in ascending order, obtaining a large-side pressure value and a small-side pressure value, and obtaining a pressure difference value from the large-side pressure value and the small-side pressure value; S122, obtaining a compensation value for the pressure value on the smaller side according to the pressure difference; S123, determining the effective proportion of the original pressure values ​​collected by each pressure sensor in the original overall pressure value; S124, based on the values ​​obtained in steps S121 to S123 after compensating for the smaller pressure values ​​and the effective ratio of the original pressure values ​​collected by each pressure sensor to the original overall pressure value, calculate a corrected overall pressure value according to the following formula; ， Among them, P adj is the corrected overall pressure value corresponding to the blood pressure value, P b is the compensation value for the pressure value on the smaller side, W is the average value of the original pressure values ​​collected by each pressure sensor. i The weight of the original pressure value collected by each pressure sensor in the original overall pressure value, P i is the original pressure value collected by each pressure sensor, and n is the number of sensors.

3. The method for simulating blood pressure measurement based on a mercury sphygmomanometer according to claim 2, characterized in that: The specific steps for obtaining the compensation value for the pressure value on the smaller side in step S122 are as follows: S1221: Obtain the pressure difference ratio of the smaller side based on the pressure difference obtained in step S121, that is, determine the impact of the uninflatable area, and determine the compensation value for the smaller side based on the pressure difference and the pressure difference ratio. The calculation formula is: ， Among them, P b is the compensation value for the smaller side, P d is the pressure difference between the larger side and the smaller side, r d is the pressure difference ratio.

4. The method for simulating blood pressure measurement based on a mercury sphygmomanometer according to claim 2, characterized in that: The steps of step S123 for determining the effective proportion of the original pressure values ​​collected by each pressure sensor in the original overall pressure value are as follows: S1231. Calculate the absolute deviation of the original pressure value collected by each pressure sensor based on the original pressure value collected by each pressure sensor. The calculation formula is as follows: ， Among them, d i is the absolute deviation of the original pressure values ​​collected by each pressure sensor, is the average value of the original pressure values ​​collected by each pressure sensor, P i The original pressure value collected by each pressure sensor; S1232. After obtaining the absolute deviation of the original pressure values ​​collected by each pressure sensor, the degree of deviation of the original pressure values ​​collected by each pressure sensor in the original overall pressure value can be obtained according to the following formula; ， r i is the ratio of the absolute deviation of each pressure value to the overall deviation, which reflects the degree of deviation of each collected original pressure value. i is the absolute deviation of the original pressure values ​​collected by each pressure sensor, d sum It is the sum of the absolute deviations of the original pressure values ​​collected by each pressure sensor; S1233: After obtaining the deviation degree of the original pressure value collected by each pressure sensor in step S1232, the effective proportion of the original pressure value collected by each pressure sensor in the original overall pressure value is obtained as w. i , the calculation formula is as follows: ， Among them, w i It is the effective ratio of the raw pressure value collected by each pressure sensor to the raw overall pressure value.

5. The method for performing simulated blood pressure measurement based on a mercury sphygmomanometer according to claim 1, characterized in that: Step 2 includes the following steps: S21, determine whether the position of the mercury sphygmomanometer cuff is correct, if correct, proceed to step S22, if not, adjust the cuff position correctly and proceed to step S23; S22. Inflate the cuff to above 200 mmHg. After the mercury column stabilizes, slowly deflate it to the blood pressure value at each segmented point. Determine whether the overall pressure value obtained after correcting the original pressure values ​​collected by each pressure sensor at this blood pressure value is consistent with the overall pressure value corresponding to the corresponding relationship between the blood pressure value and the overall pressure value pre-stored in the main control unit. If they are consistent, complete the calibration of the mercury sphygmomanometer. If not, adjust the position and tightness of the cuff and re-measure and determine until they are consistent.

6. A simulated blood pressure measurement device for implementing the simulated blood pressure measurement method according to any one of claims 1 to 5, characterized in that: The device comprises a simulated arm, a mercury sphygmomanometer and a host computer. The simulated arm comprises a simulated arm body, and a first photosensitive detection element and a second photosensitive detection element provided on the simulated arm body, for detecting whether the mercury sphygmomanometer cuff is correctly placed. and a plurality of pressure sensors arranged around the main body of the simulated arm, the pressure sensors being used to collect the original pressure values ​​of the simulated arm during the inflation and / or deflation of the mercury sphygmomanometer cuff within the blood pressure range of 0 to 180 mmHg and transmit them to the main control unit; and a main control unit provided in the main body of the simulation arm, wherein the main control unit includes a storage unit, The storage unit pre-stores a correction algorithm for performing correction calculations on the original pressure values ​​collected by the pressure sensor to obtain a corrected overall pressure value, and data on the corresponding relationship between each blood pressure value segment and the overall pressure value; a judgment unit, the judgment unit being used to judge whether the obtained overall pressure value is consistent with the overall pressure value corresponding to a certain blood pressure value in the blood pressure value-overall pressure value correspondence data pre-stored in the storage unit during calibration of the mercury sphygmomanometer to be tested, and to judge whether the obtained real-time overall pressure value is between the overall pressure values ​​corresponding to two adjacent blood pressure values ​​in the blood pressure value-overall pressure value correspondence data pre-stored in the storage unit during simulated blood pressure measurement; A control unit, the control unit being used to control the speaker to emit different Korotkoff sounds within the diastolic and systolic pressure ranges when measuring simulated blood pressure in real time; and a mercury sphygmomanometer for applying pressure to the pressure sensor on the simulated arm to achieve the corresponding blood pressure value.

7. The simulated blood pressure measurement device according to claim 6, characterized in that: The first photosensitive detection element is set 3 cm above the elbow fossa of the simulated arm main body, and the second photosensitive detection element is set 24 cm above the elbow fossa of the simulated arm main body.

8. The simulated blood pressure measurement device according to claim 6, characterized in that: The pressure sensors are provided in any number of 4, 6 or 8 and are arranged between the two photosensitive detection elements in a manner of surrounding the simulated arm body.

9. The simulated blood pressure measurement device according to claim 8, characterized in that: The pressure sensor is arranged in a groove on the simulation arm body and is fixed to the simulation arm body by screws. An elastic pressing member with threaded connection is arranged on the outside of the pressure sensor.

10. The simulated blood pressure measurement device according to claim 6, characterized in that: It also includes a simulated artery and an air pump. The simulated artery is connected to the air pump for management, and the air pump is electrically connected to the control unit.

Images