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Proceedings Paper

A non-contact optical procedure for precise measurement of respiration rate and flow
Author(s): Lorenzo Scalise; Paolo Marchionni; Ilaria Ercoli
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Paper Abstract

The use of standard instrumentation for the assessment of the respiration rate as of flow is an important goal in medicine. Spirometers, textile-based capacitive sensors or photopletismography are standard contact instrumentations used for such aim; the main drawback in the use of such instrumentations is the necessity to have a direct contact of the instrument with the patient. In this paper, we present an optical no-contact method for monitoring of both the respiration rate and flow. This method is based on the measurement of external chest wall movement by a laser Doppler vibrometer. The measurement procedure has already been demonstrated to be extremely well performing for what concern the monitoring of the cardiac activity. The proposed method can be operated at a distance of 1.5 m, on different point of the patient thoracic and abdominal area. We have monitored respiration rate and flow on 8 patients with a spirometer and simultaneously with the proposed noncontact measurement procedure. Bland-Altman analysis of the respiration rate measured with both instruments demonstrate a mean error on the determination of the respiration rate of < 1% and of the < 4% for the instantaneous flow. We also report a study on the optimal position on the thoracic area based on quality of the signal measured on the same population of subject.

Paper Details

Date Published: 14 May 2010
PDF: 8 pages
Proc. SPIE 7715, Biophotonics: Photonic Solutions for Better Health Care II, 77150G (14 May 2010); doi: 10.1117/12.854482
Show Author Affiliations
Lorenzo Scalise, Univ. Politecnica delle Marche (Italy)
Paolo Marchionni, Univ. Politecnica delle Marche (Italy)
Ilaria Ercoli, Univ. Politecnica delle Marche (Italy)

Published in SPIE Proceedings Vol. 7715:
Biophotonics: Photonic Solutions for Better Health Care II
Jürgen Popp; Wolfgang Drexler; Valery V. Tuchin; Dennis L. Matthews, Editor(s)

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