Pressure is one of the important parameters to measure the cardiovascular system of the human body. It has important significance in disease diagnosis, treatment process and prognosis judgment. At present, the blood pressure measurement on the market mostly adopts the automatic oscillometric method (cuff inflation and pressure type), which can only obtain the blood pressure value of the human body at a certain moment, and it is difficult to perform real-time monitoring. .. Let's take a look at the related content with the medical electronics editor.
Dalian United Holdings announced that its affiliates have launched Betterlife's sleeveless blood pressure monitoring solution for simultaneous detection and analysis of ECG and volume pulse wave signals. The solution can synchronously collect ECG and volume pulse wave signals, and analyze the signals in real time to extract physiological indexes such as blood pressure, heart rate and ECG of human body. The collected physiological index and ECG and pulse wave signals can be uploaded by means of BLE, WIFI, and the like.
Blood pressure is one of the important parameters to measure the cardiovascular system of the human body. It has important significance in disease diagnosis, treatment process and prognosis. At present, the blood pressure measurement on the market mostly adopts the automatic oscillometric method (cuff inflation and pressure type), which can only obtain the blood pressure value of the human body at a certain moment, and it is difficult to perform real-time monitoring. Moreover, blood pressure measurements are affected by factors such as emotional agitation, stress, and exercise. Continuous measurement of blood pressure can effectively prevent the occurrence of cardiovascular and cerebrovascular diseases, and provide a more sufficient basis for clinical diagnosis and post-treatment, especially in the special circumstances such as clinical monitoring to observe the trend of continuous blood pressure has important practical significance.
Figure 1 - Great Life Friends of the Betterlife Sleeve Blood Pressure Monitoring Solution Functional Framework
At present, the non-invasive continuous blood pressure measurement method has higher requirements on experimental conditions. The ECG and PPG fusion signal algorithm can be separated by the ECG signal and the photoplethysmographic pulse wave (PPG) signal, and the synchronized ECG will be synchronized. Separated from the PPG signal. Using the improved median filtering algorithm to eliminate the high frequency interference of ECG and PPG signals, and then using the wavelet transform to baseline drift algorithm to eliminate the baseline drift of the human body due to jitter, breathing, etc., using differential threshold method to achieve ECG and The envelope of the PPG signal extracts and extracts the feature points for calculating the pulse wave propagation time, and then calculates the pulse wave propagation time (PWTT) combined with the study of the relationship between blood pressure and PWTT to derive the blood pressure model.
Figure 2 - The biglife big friend is still launching the Betterlife sleeveless blood pressure monitoring solution application scenario
Function description :
· Provide collection of ECG and PPG raw data;
· Provide 3.3V power supply;
· Support primary/secondary board signal selection method;
· PPG signal supports I2C interface
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