Development of a Tonometric Sensor with a Decoupled Circular Array for Precisely Measuring Radial Artery Pulse.

Area of Science:

• Biomedical Engineering
• Medical Diagnostics
• Sensor Technology

Background:

• The radial artery pulse is a critical clinical diagnostic index in both Eastern and Western medicine.
• Piezoresistive sensor arrays are prominent tools for radial artery pulse measurement.
• Effective pulse assessment requires channel independence and optimal sensor arrangement for spatial-temporal data.

Purpose of the Study:

• To develop a circular-type seven-channel piezoresistive sensor array.
• To enhance the accuracy of radial artery pulse measurement.
• To enable precise spatial-temporal analysis of pulse waves.

Main Methods:

• Development of a circular-type seven-channel piezoresistive sensor array.
• Utilization of face-down bonding (FDB) for sensor integration.
• Implementation of a three-layered housing structure to ensure channel independence.

Main Results:

• The fabricated sensor array successfully eliminated crosstalk among channels.
• Demonstrated precise measurement of pulse waves with a circular arrangement.
• Validated sensor sensitivity and the capability to estimate blood vessel direction using a pulse simulator.

Conclusions:

• The developed piezoresistive sensor array enables accurate radial artery pulse diagnosis.
• The circular arrangement and FDB method facilitate effective spatial-temporal pulse analysis.
• This technology holds promise for advancing non-invasive pulse-based diagnostic tools.