Method for improving blood pressure measurement accuracy of atrial fibrillation patient

Abstract

The invention belongs to the technical field of biological electrocardio detection, and particularly discloses a method for improving the blood pressure measurement accuracy of an atrial fibrillation patient, a pulse sensing chip and a pulse rate variability calculation chip are added to an electronic sphygmomanometer, and the measurement specifically comprises the following steps that S1, the electronic sphygmomanometer measures the blood pressure and the heart rate of a testee; s2, judging whether the pulse time interval is regular or not, and when the pulse time interval is regular, entering a normal heart rate measurement step S2; when the pulse time interval is irregular, the atrial fibrillation rhythm is judged, and measurement enters the atrial fibrillation heart rate measurement step S4. According to the scheme, the comprehensive evaluation result is obtained by combining the two factors of the pulse rate and the pulse rate variability, and the problem that the blood pressure measurement accuracy of the atrial fibrillation patient is insufficient is effectively solved by reasonably increasing the measurement times.

Description

Technical Field

[0001] The present invention belongs to the technical field of biological electrocardiogram detection, and specifically discloses a method for improving the accuracy of blood pressure measurement in patients with atrial fibrillation. Background Art

[0002] Blood pressure monitoring is of great significance for the health detection of patients with atrial fibrillation. Accurate blood pressure measurement is a prerequisite for effective blood pressure management in patients with atrial fibrillation. Clinically, it is recommended to use a mercury sphygmomanometer to measure the patient's blood pressure multiple times to judge the patient's blood pressure. However, since the mercury sphygmomanometer has gradually withdrawn from the market, and patients cannot use the mercury sphygmomanometer for self-measurement at any time. The electronic sphygmomanometer based on the oscillometric method is currently widely used in general blood pressure measurement. However, due to the irregular heart rhythm and pulse deficit in patients with atrial fibrillation, the blood pressure variability and error measured by using an electronic sphygmomanometer in patients with atrial fibrillation are relatively large. Therefore, there is an urgent need for a method based on an electronic sphygmomanometer to improve the accuracy of blood pressure measurement in patients with atrial fibrillation. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for improving the accuracy of blood pressure measurement in patients with atrial fibrillation to solve the problem of insufficient accuracy of blood pressure measurement in patients with atrial fibrillation.

[0004] To achieve the above purpose, the technical solution of the present invention is: a method for improving the accuracy of blood pressure measurement in patients with atrial fibrillation, adding a pulse sensing chip and a pulse rate variability calculation chip to an electronic sphygmomanometer. The measurement specifically includes the following steps:

[0005] S1: The electronic sphygmomanometer measures the blood pressure of the subject, and at the same time, the pulse sensing chip measures the heart rate of the subject to judge whether the pulse time interval is regular. The measurement is repeated three times, with an interval of 1 minute between each measurement, and the average value is taken; when the pulse time interval is regular, the measurement enters the normal heart rate measurement step S2; when the pulse time interval is irregular, it is judged as atrial fibrillation rhythm, and the measurement enters the atrial fibrillation heart rate measurement step S4;

[0006] S2: Perform two blood pressure measurements, each measurement is repeated three times, and the average value is taken, with an interval of 1 minute between each measurement;

[0007] S3: Calculate the average value of the blood pressure measurement results obtained in S1 and the two blood pressure measurements obtained in S2 as the normal heart rate blood pressure measurement result for output;

[0008] S4: Perform three blood pressure measurements, and the pulse sensing chip measures and records the heart rate value. Each measurement is repeated three times, and the average value is taken, with an interval of 1 minute between measurements;

[0009] S5: The heart rate variability calculation chip compares the measured heart rate value with the preset pulse rate threshold X and variability threshold Y of the system. When the average value A of the three pulse rate measurements obtained in S4 < X and the variability result B of the three pulse rate measurements < Y, it enters step S6; when the average value A of the three pulse rate measurements obtained in S4 ≥ X and the variability result B of the three pulse rate measurements ≥ Y, it enters step S7; where: the pulse rate threshold X is 100 beats / min, and the variability threshold Y is 10 beats / min;

[0010] S6: Calculate the average value of the three blood pressure measurement results obtained in step S4 as the atrial fibrillation heart rate blood pressure measurement result of the subject and output it;

[0011] S7: Perform the fourth blood pressure measurement, take the average value, with a measurement interval of 1 min. Combine the three blood pressure measurement results in S4, and calculate the average value of the four measurements as the atrial fibrillation heart rate blood pressure measurement result of the subject and output it.

[0012] The working principle of this technical solution lies in:

[0013] When the atrial fibrillation ventricular rate ≥ 100 beats / min, the systolic / diastolic blood pressure level is significantly lower than that in sinus rhythm. When the ventricular rate < 100 beats / min, the systolic / diastolic blood pressure levels in the atrial fibrillation and sinus rhythm states are similar. By designing a pulse sensing chip and implanting a heart rate variability calculation chip in the current electronic sphygmomanometer, it can judge whether the patient's heart rate is atrial fibrillation according to whether the pulse is regular and whether the time interval is regular while the electronic sphygmomanometer measures the patient's blood pressure; for atrial fibrillation patients, when the detected pulse rate < 100 beats / min and the pulse rate variability < 10 beats / min during three measurements, the measured blood pressure reading has high reliability, and its average value can be used as the result; but when the pulse rate ≥ 100 beats / min, or when the pulse rate variability ≥ 10 beats / min during three measurements, then the fourth measurement is performed, and the average value of the four measurements is taken as the result.

[0014] The beneficial effects of this technical solution lie in:

[0015] (1) When the ventricular rate of atrial fibrillation patients ≥ 100 beats / min, it is an important factor causing the error of the oscillometric method. The solution accurately measures the heart rate, increases the number of measurements in this case, and calculates the average result, which overcomes the problem of low accuracy of blood pressure measurement by the oscillometric method in atrial fibrillation with rapid ventricular rate to a certain extent;

[0016] (2) On the basis of the pulse rate, the investigation of the pulse rate variability is added, and the number of measurements is increased for the results when the pulse rate variability ≥ 10 beats / min; a comprehensive evaluation is obtained by combining the two factors, which can further help judge whether the systolic blood pressure reading of atrial fibrillation patients is accurate and improve the accuracy of blood pressure measurement for atrial fibrillation patients; at the same time, the solution strictly implements the measurement and calculation rules of taking the average value of three measurements, which greatly improves the measurement accuracy.

[0017] Further, when it is determined in step S1 that the pulse time interval is irregular, a prompt is broadcast: The current heart rhythm monitoring indicates atrial fibrillation rhythm, and repeated measurements will be performed at intervals of 1 minute each. The subject should maintain the original measurement posture. Through the above settings, it is possible to provide a description of the situation for the user's blood pressure measurement and provide standardized operation guidance, further improving the accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a flowchart of a method for improving the accuracy of blood pressure measurement in atrial fibrillation patients according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following is a further detailed description through specific embodiments: By designing a pulse sensing chip and implanting a pulse rate variability calculation chip in the current electronic sphygmomanometer, atrial fibrillation determination and blood pressure measurement are performed;

[0020] Attached Figure 1 shown is a flowchart of a method for improving the accuracy of blood pressure measurement in atrial fibrillation patients, which specifically includes the following steps:

[0021] S1: The electronic sphygmomanometer measures the blood pressure of the subject, and at the same time the pulse sensing chip measures the heart rate of the subject, determines whether the pulse time interval is regular, measures three times repeatedly, with an interval of 1 min for each measurement, and takes the average value; when the pulse time interval is regular, the measurement enters the normal heart rate measurement step S2; when the pulse time interval is irregular, it is determined as atrial fibrillation rhythm, and the measurement enters the atrial fibrillation heart rate measurement step S4;

[0022] S2: Perform two blood pressure measurements, each measurement is repeated three times, take the average value, and the interval between each measurement is 1 min;

[0023] S3: Calculate the average value of the blood pressure measurement results obtained in S1 and the two blood pressure measurements obtained in S2 as the normal heart rate blood pressure measurement result for output;

[0024] S4: Perform three blood pressure measurements, and the pulse sensing chip measures and records the heart rate value. Each measurement is repeated three times, take the average value, and the measurement interval is 1 min;

[0025] S5: The pulse rate variability calculation chip compares the heart rate measurement value with the system preset pulse rate threshold X and variability threshold Y. When the average value A of the three pulse rate measurements obtained in S4 < X and the variability result B of the three pulse rate measurements < Y, enter step S6; when the average value A of the three pulse rate measurements obtained in S4 ≥ X and the variability result B of the three pulse rate measurements ≥ Y, enter step S7; where: the pulse rate threshold X is 100 beats / min, and the variability threshold Y is 10 beats / min;

[0026] S6: Calculate the average value of the three blood pressure measurement results obtained in step S4 and output it as the atrial fibrillation heart rate blood pressure measurement result of the subject;

[0027] S7: Perform the fourth blood pressure measurement, take the average value, with a measurement interval of 1 min. Combine the three blood pressure measurement results in S4, calculate the average value of the four measurements and output it as the atrial fibrillation heart rate blood pressure measurement result of the subject.

[0028] The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics well known in the art are not described in detail herein. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent.

Claims

1. A method for improving the accuracy of blood pressure measurement in patients with atrial fibrillation, characterized in that, Add a pulse sensing chip and a heart rate variability calculation chip to the electronic sphygmomanometer. The measurement specifically includes the following steps: S1: The electronic sphygmomanometer measures the blood pressure of the subject, and at the same time the pulse sensing chip measures the heart rate of the subject, judges whether the pulse time interval is regular, measures three times repeatedly, with an interval of 1 minute for each measurement, and takes the average value; when the pulse time interval is regular, the measurement enters the normal heart rate measurement step S2; when the pulse time interval is irregular, it is judged as atrial fibrillation rhythm, and the measurement enters the atrial fibrillation heart rate measurement step S4; S2: Perform two blood pressure measurements, each measurement is repeated three times, take the average value, and the interval between each measurement is 1 minute; S3: Calculate the average value of the blood pressure measurement results obtained in S1 and the two blood pressure measurements obtained in S2 as the normal heart rate blood pressure measurement result for output; S4: Perform three blood pressure measurements, and the pulse sensing chip measures and records the heart rate value. Each measurement is repeated three times, take the average value, and the measurement interval is 1 minute; S5: The heart rate variability calculation chip compares the heart rate measurement value with the system preset pulse rate threshold X and variability threshold Y. When the average value A of the three pulse rate measurements obtained in S4 < X and the variability result B of the three pulse rate measurements < Y, enter step S6; when the average value A of the three pulse rate measurements obtained in S4 ≥ X and the variability result B of the three pulse rate measurements ≥ Y, enter step S7; where: the pulse rate threshold X is 100 beats / min, and the variability threshold Y is 10 beats / min; S6: Calculate the average value of the three blood pressure measurement results obtained in step S4 as the atrial fibrillation heart rate blood pressure measurement result of the subject for output; S7: Perform the fourth blood pressure measurement, take the average value, with an interval of 1 minute for the measurement, combine the three blood pressure measurement results in S4, and calculate the average value of the four measurements as the atrial fibrillation heart rate blood pressure measurement result of the subject for output.

2. The method for improving the accuracy of blood pressure measurement in patients with atrial fibrillation according to claim 1, characterized in that, When it is judged in step S1 that the pulse time interval is irregular, a prompt is broadcast: The current heart rhythm monitoring prompt is atrial fibrillation rhythm, and repeated measurements will be performed, with an interval of 1 minute each time. The subject should maintain the original measurement posture.

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