Development of a Luminous Textile for Reflective Pulse Oximetry Measurements

Overview

Journal Biomed Opt Express

Specialty Radiology

Date 2014 Aug 20

PMID 25136484

Citations 13

Authors

Marek Krehel

Martin Wolf

Luciano F Boesel

Rene M Rossi

Gian-Luca Bona

Lukas J Scherer

Affiliations

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Abstract

In this paper, a textile-based sensing principle for long term photopletysmography (PPG) monitoring is presented. Optical fibers were embroidered into textiles such that out-coupling and in-coupling of light was possible. The "light-in light-out" properties of the textile enabled the spectroscopic characterization of human tissue. For the optimization of the textile sensor, three different carrier fabrics and different fiber modifications were compared. The sample with best light coupling efficiency was successfully used to measure heart rate and SpO2 values of a subject. The latter was determined by using a modified Beer-Lambert law and measuring the light attenuation at two different wavelengths (632 nm and 894 nm). Moreover, the system was adapted to work in reflection mode which makes the sensor more versatile. The measurements were additionally compared with commercially available system and showed good correlation.

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