A Near-Field Radio Frequency System for Continuous Left and Right Lung Volume Sensing.

Area of Science:

• Biomedical Engineering
• Respiratory Physiology
• Wearable Technology

Background:

• Lung function tests are crucial for diagnosing respiratory disorders.
• Current methods often require clinical settings, limiting at-home monitoring.
• Non-invasive techniques are sought for convenient respiratory wellness tracking.

Purpose of the Study:

• To evaluate near-field radio-frequency (NFRF) sensors for continuous, independent lung volume monitoring.
• To assess the accuracy of NFRF sensors against traditional spirometry.
• To demonstrate the capability of monitoring individual lung dynamics.

Main Methods:

• NFRF sensors were applied to mechanically ventilated porcine models.
• Sensors measured pulmonary dynamics and tidal volume during interventions.
• Bronchial blockers isolated each lung for independent monitoring; spirometry served as a reference.

Main Results:

• NFRF sensors achieved lung volume measurements with an average error of 9.2% compared to spirometry.
• Individual lung dynamics were successfully monitored, including during one-lung obstruction.
• Demonstrated continuous acquisition of pulmonary dynamics for each lung independently.

Conclusions:

• NFRF sensors represent a novel wearable method for continuous individual lung volume monitoring.
• This technology can aid in managing acute and chronic respiratory distress.
• Potential for early detection of life-threatening conditions like pneumothorax.