University of Oulu

Seppänen T.M., Alho OP., Vakkala M., Alahuhta S., Seppänen T. (2017) Continuous Postoperative Respiratory Monitoring with Calibrated Respiratory Effort Belts: Pilot Study. In: Fred A., Gamboa H. (eds) Biomedical Engineering Systems and Technologies. BIOSTEC 2016. Communications in Computer and Information Science, vol 690. Springer, Cham

Continuous postoperative respiratory monitoring with calibrated respiratory effort belts : pilot study

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Author: Seppänen, Tiina M.1,2; Alho, Olli-Pekka2,3,4; Vakkala, Merja2,5;
Organizations: 1Physiological Signal Analysis Team, University of Oulu, Oulu, Finland
2Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
3Department of Otorhinolaryngology, Oulu University Hospital, Oulu, Finland
4PEDEGO Research Unit, University of Oulu, Oulu, Finland
5Department of Anesthesiology, Oulu University Hospital, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.9 MB)
Persistent link:
Language: English
Published: Springer Nature, 2017
Publish Date: 2017-05-15


Postoperative respiratory complications are common in patients after surgery. Respiratory depression and subsequent adverse outcomes can arise from pain, residual effects of drugs given during anaesthesia and administration of opioids for pain management. There is an urgent need for a continuous, real-time and non-invasive respiratory monitoring of spontaneously breathing postoperative patients. For this purpose, we used rib cage and abdominal respiratory effort belts for the respiratory monitoring pre- and postoperatively, with a new calibration method that enables accurate estimates of the respiratory airflow waveforms even when breathing style changes. Five patients were measured with respiratory effort belts and mask spirometer. Preoperative measurements were done in the operating room, whereas postoperative measurements were done in the recovery room. We compared five calibration models with pre- and postoperative training data. The postoperative calibration approach with two respiratory effort belts produced the most accurate respiratory airflow waveforms and tidal volume, minute volume and respiratory rate estimates. Average results for the best model were: coefficient of determination R² was 0.91, tidal volume error 5.8%, minute volume error 8.5% and BPM (Breaths per Minute) error 0.21. The method performed well even in the following challenging respiratory cases: low airflows, thoracoabdominal asynchrony and hypopneic events. It was shown that a single belt measurement can be sufficient in some cases. The proposed method is able to produce estimates of postoperative respiratory airflow waveforms to enable accurate, continuous, real-time and non-invasive respiratory monitoring postoperatively. It provides also potential to optimize postoperative pain management and enables timely interventions.

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Series: Communications in computer and information science
ISSN: 1865-0929
ISSN-E: 1865-0937
ISSN-L: 1865-0929
ISBN: 978-3-319-54717-6
ISBN Print: 978-3-319-54716-9
Volume: 690
Pages: 340 - 359
DOI: 10.1007/978-3-319-54717-6_19
Host publication: Biomedical Engineering Systems and Technologies : BIOSTEC 2016
Host publication editor: Fred, Ana
Gamboa, Hugo
Conference: International Joint Conference on Biomedical Engineering Systems and Technologies : BIOSTEC 2016
Type of Publication: A3 Book chapter
Field of Science: 213 Electronic, automation and communications engineering, electronics
217 Medical engineering
3126 Surgery, anesthesiology, intensive care, radiology
Funding: Finnish Cultural Foundation, North Ostrobothnia Regional Fund and International Doctoral Programme in Biomedical Engineering and Medical Physics (iBioMEP) are gratefully acknowledged for financial support.
Copyright information: © Springer International Publishing AG 2017