Implementation of array sensor module for a radial artery tonometry.

Area of Science:

• Biomedical Engineering
• Medical Devices
• Sensor Technology

Background:

• Accurate pulse wave measurement is crucial for cardiovascular health assessment.
• Existing methods may have limitations in sensitivity or invasiveness.
• Development of novel sensor technologies is needed for improved diagnostics.

Purpose of the Study:

• To develop and validate an array sensor module for measuring radial artery pulse waves.
• To assess the performance characteristics of the developed piezoresistive pressure sensors.
• To confirm the module's capability in clearly detecting pulse wave signals.

Main Methods:

• Fabrication of an array sensor module integrating 7 piezoresistive sensors (1x1 mm).
• Construction using PCB, silicon guides, and polydimethylsiloxane (PDMS) for sensor protection and signal transmission.
• Calibration and testing of sensor module performance using controlled intra-chamber pressure increments (60-220 mmHg).

Main Results:

• The developed sensor module demonstrated high accuracy, with a coefficient of determination (r^2) > 0.999 during pressure characteristic testing.
• The array sensor module successfully and clearly detected the pulse wave signals from the radial artery.
• The integrated PDMS layer effectively protected the sensors and wiring while ensuring faithful pressure transmission.

Conclusions:

• The developed array sensor module is suitable for accurate radial artery pulse wave measurement.
• The sensor module exhibits excellent performance characteristics for non-invasive cardiovascular monitoring.
• This technology holds promise for advancing pulse wave analysis and related diagnostic applications.