Design of a Continuous Blood Pressure Measurement System Based on Pulse Wave and ECG Signals

Area of Science:

• Biomedical Engineering
• Cardiovascular Technology
• Signal Processing

Background:

• Rising job competition increases stress, leading to lifestyle disorders and higher cardiovascular disease risk.
• Hypertension is a common cardiovascular disease, but current measurement devices are bulky and can yield unsatisfactory results.
• Existing blood pressure monitors often lack portability and user-friendliness for frequent measurements.

Purpose of the Study:

• To design a portable signal collection module for pulse waves and electrocardiograph (ECG) signals.
• To develop a signal processing method for accurate blood pressure measurement using pulse wave velocity.
• To improve the accuracy and user experience of blood pressure monitoring systems.

Main Methods:

• Collected pulse wave and electrocardiograph (ECG) signals using a novel module.
• Applied signal processing techniques, including wavelet transform, to filter noise and detect feature points.
• Developed an improved blood pressure measurement method based on pulse wave velocity and instance-specific wave shape analysis.

Main Results:

• The developed system filters noise and amplifies physiological signals effectively.
• Wavelet transform successfully eliminated baseline drift noise and identified key signal feature points.
• The proposed method improved blood pressure measurement accuracy by 58%, meeting American Medical Instrument Promotion Association standards.

Conclusions:

• The designed system offers a feasible and accurate solution for blood pressure monitoring.
• The novel approach using pulse wave velocity and wave shape analysis significantly enhances measurement precision.
• The portable design addresses limitations of current heavy blood pressure measurement devices, improving user experience.