Portable forced oscillation device for point-of-care pulmonary function testing.

Area of Science:

• Biomedical Engineering
• Respiratory Medicine
• Medical Devices

Background:

• Forced oscillation technique (FOT) is a simple and accurate method for pulmonary function testing.
• Current FOT devices are often large and expensive, limiting their widespread clinical use.
• There is a need for accessible, portable solutions for point-of-care pulmonary function assessment.

Purpose of the Study:

• To verify the feasibility of a smart and portable FOT device for point-of-care testing.
• To develop and optimize signal processing for accurate impedance estimation.
• To evaluate the performance and clinical applicability of the novel device.

Main Methods:

• Development of a portable FOT device utilizing a small subwoofer and ultrasonic sensor.
• Optimization of signal processing algorithms for pulmonary impedance estimation.
• Characterization of oscillatory waveforms and performance evaluation using mechanical models and human subjects.

Main Results:

• The developed device demonstrated high signal quality with coherence function above 0.9 across all tested frequencies.
• Measurement error was consistently below 10%, indicating high accuracy.
• The device exhibited good repeatability and met clinical diagnostic requirements.

Conclusions:

• A smart, portable FOT device based on a subwoofer and ultrasonic sensor is feasible for point-of-care pulmonary function testing.
• The optimized signal processing and device design ensure accurate and repeatable lung function measurements.
• This technology has the potential to increase the accessibility and application of FOT in clinical settings.