Oral Cavity Pressure Measurement-based Respiratory Monitoring System with Reduced Susceptibility to Motion Artifacts

Area of Science:

• Biomedical Engineering
• Physiological Monitoring

Background:

• Conventional respiratory monitoring methods can be cumbersome or prone to artifacts.
• Accurate and unobtrusive respiratory rate monitoring is crucial for various clinical and personal health applications.

Purpose of the Study:

• To develop and validate a novel respiratory monitoring system using direct measurement of oral cavity pressure.
• To assess the accuracy, reliability, and real-world applicability of the proposed intraoral pressure sensing approach.

Main Methods:

• A pressure sensor was placed inside the oral cavity to measure intraoral pressure signals.
• Time-domain analysis of pressure signals was performed and validated against a conventional respiration monitoring belt.
• Testing was conducted on four subjects under stationary and non-stationary conditions.

Main Results:

• The proposed system achieved 99% accuracy in monitoring respiration rate compared to the reference measurement.
• The system effectively tracked respiration patterns and detected breathing events regardless of the breathing route (nasal or oral).
• The system demonstrated minimal susceptibility to motion artifacts.

Conclusions:

• Direct measurement of oral cavity pressure offers a highly accurate method for respiratory monitoring.
• The developed system is robust, minimally affected by motion, and suitable for wearable applications in daily life.