An experimental study of pulse wave measurements with magnetic induction phase shift method

Area of Science:

• Biomedical Engineering
• Cardiovascular Physiology
• Sensor Technology

Background:

• Pulse wave monitoring is crucial for assessing cardiovascular health.
• Existing methods require validation for improved accuracy and stability.

Purpose of the Study:

• To design high-sensitivity ring sensors for pulse detection.
• To develop a simultaneous acquisition platform using National Instruments T-Clock technology (NI-TCLK).
• To compare magnetic induction phase shift (MIPS) with traditional pulse detection methods.

Main Methods:

• Utilized a 10.7 MHz excitation signal with 20 dBm power.
• Employed a simultaneous acquisition platform with NI-TCLK technology.
• Recruited 30 adult volunteers (20-30 years) for sensor testing on forefingers.

Main Results:

• MIPS signal phase shift ranged from 0.6-0.8 degrees.
• MIPS demonstrated superior pulse rate stability and fewer deviations than the traditional method.
• Spectral analysis confirmed pulse frequencies between 1-3 Hz, with regularity around 1.5 Hz.

Conclusions:

• Magnetic induction pulse wave measurement accurately captures pulse wave characteristics.
• MIPS technology presents a viable advancement for cardiovascular monitoring.
• The developed system shows promise for clinical applications in pulse wave analysis.