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Proceedings Paper

Fiber optic sensor for the assessment of breathing effort
Author(s): Anatoly Babchenko; Sergei Turinvenko; Boris Khanokh; Meir Nitzan
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Paper Abstract

Several methods have been developed for the qualitative and quantitative measurement of breathing effort. The most useful kind of breathing pattern monitor includes devices for recording chest and abdomen dimension changes, such as impedance plethysmography and respiratory induction plethysmography. These devices can measure the tidal volume in relative terms, and even measure it in absolute terms after suitable calibration. In this study a novel method for measuring chest circumference based on an optical fiber is presented. The sensor is based on the measurement of light transmitted through a bent optical fiber, which is connected to an elastic band, wrapped around the chest, and whose radius of curvature changes due to the respiratory act. The amount of transmitted light is related to the radius of curvature of the fiber which depends on the chest circumference. The output of the respiratory sensor was checked qualitatively by changing the respiration rate and depth. The changes in breathing effort were clearly demonstrated in the sensor output recording. The respiratory effort was also correlated with the heart rate, measured by photoplethysmography. Statistically significant correlation was found between the lungs' volume and the heart rate, but the correlation coefficient was not high.

Paper Details

Date Published: 3 January 1995
PDF: 8 pages
Proc. SPIE 2631, Medical and Fiber Optic Sensors and Delivery Systems, (3 January 1995); doi: 10.1117/12.229192
Show Author Affiliations
Anatoly Babchenko, Jerusalem College of Technology (Israel)
Sergei Turinvenko, Jerusalem College of Technology (Israel)
Boris Khanokh, Jerusalem College of Technology (Israel)
Meir Nitzan, Jerusalem College of Technology (Israel)

Published in SPIE Proceedings Vol. 2631:
Medical and Fiber Optic Sensors and Delivery Systems
Nathan I. Croitoru; Mitsunobu Miyagi; Guillermo Orellana; Annamaria Verga Scheggi; Henricus J. C. M. Sterenborg, Editor(s)

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