Comparison of Optoelectronic Plethysmography, Torsiometers, and Chest Band for Respiratory Monitoring

The rapid advancement of health monitoring technologies has increased the demand for self-management and home healthcare, while the dependence of traditional medical equipment on limited labor and resources poses a significant challenge. To address the shortcomings of traditional photoelectric respiratory monitoring techniques, such as their complex operation and restricted detection range, we developed a high-precision respiratory monitoring system utilizing wearable devices. Specifically, an algorithm module has been implemented to effectively extract and analyze respiratory signals derived from portable torsiometers. Comparative analyses against traditional photoelectric detection methods reveal that the wearable-based system not only matches conventional techniques in terms of detection sensitivity and response times but also offers enhanced convenience. The objective of this paper is to underscore an innovative approach that rectifies the deficiencies in current respiratory monitoring technologies, particularly with respect to accuracy, ease of use, and applicability. Experimental validation demonstrated that the results obtained from this design are consistent with those measured using photopyroelectric devices as the gold standard.Clinical relevance— This underscores the clinical merit of the wearable respiratory device, facilitating prolonged lung function monitoring and delivering actionable metrics for managing chronic conditions like COPD beyond hospital confines.