TechRxiv

A Magnetic Field-Based Wearable Respiration Sensor for Real-Time Monitoring During Pulmonary Rehabilitation

Download (3.15 MB)
preprint
posted on 2023-12-02, 14:02 authored by Ana Sofia CarmoAna Sofia Carmo, Inês Carvalho, Joana F. Pinto, Gonçalo Chambel, Ana Martins, Rute Roberto, Hugo Ferreira, Fátima Rodrigues, Ana Fred, Hugo Plácido da Silva

Objective: In the context of pulmonary rehabilitation exercise training, wearable real-time monitoring of respiratory patterns may represent a valuable tool in increasing accessibility to treatment, as well as expanding the opportunities of treatment automation and locomotor-respiratory coupling. This work explores Hall effect sensing, paired with a permanent magnet, embedded in a chest strap. Methods: Experimental evaluation was performed considering as reference the gold-standard of respiratory monitoring, an airflow transducer, and performance was compared to another wearable device with analogous usability but with a different working principle - a piezoelectric sensor, also embedded in a chest strap. A total of 16 healthy participants performed 15 different activities, representative of pulmonary rehabilitation exercises, simultaneously using the three devices. Evaluation was performed based on detection of flow reversal events, as well as fiducials detection latency. Results: The proposed sensor shows comparable performance to the piezoelectric sensor with a mean ratio, precision, and recall of 1.10, 0.89, and 0.98, respectively, against 1.35, 0.71, and 0.96 of the piezoelectric sensor, overall also presenting consistently smaller latencies. Conclusion: The characterization of the proposed sensor also shows adequate monitoring capabilities for exercises that do not rely heavily on torso mobility, but may present a limitation when it comes to activities such as torso rotations and side stretches. Significance: This work expands the applicability of Hall effect sensors, demonstrating their use in the context of real-time respiratory monitoring.

Funding

Fundação para a Ciência e Tecnologia (FCT) under the grant 2022.12369.BD

Scientific Employment Stimulus under the grant 2022.04901.CEECIND

FCT / Ministério da Ciência, Tecnologia e Ensino Superior through National Funds and co-funded by European Union Funds under Project UIDB/50008/2020

History

Email Address of Submitting Author

ana.sofia.carmo@tecnico.ulisboa.pt

ORCID of Submitting Author

0000-0001-7954-3718

Submitting Author's Institution

Instituto de Telecomunicações and Instituto Superior Técnico

Submitting Author's Country

  • Portugal

Usage metrics

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC