PDMAA Hydrogel Coated U-Bend Humidity Sensor Suited for Mass-Production

We present a full-polymer respiratory monitoring device suited for application in environments with strong magnetic fields (e.g., during an MRI measurement). The sensor is based on the well-known evanescent field method and consists of a 1 mm plastic optical fiber with a bent region where the claddi...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 17; no. 3; p. 517
Main Authors Kelb, Christian, Körner, Martin, Prucker, Oswald, Rühe, Jürgen, Reithmeier, Eduard, Roth, Bernhard
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 04.03.2017
MDPI
Subjects
Cladding
evanescent wave sensor
humidity sensor
Medical devices
Medical electronics
Medical equipment
Optical fibers
Oxygen masks
planar systems
polymer optics
waveguides
evanescent wave sensor
humidity sensor
planar systems
waveguides
polymer optics
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Summary:We present a full-polymer respiratory monitoring device suited for application in environments with strong magnetic fields (e.g., during an MRI measurement). The sensor is based on the well-known evanescent field method and consists of a 1 mm plastic optical fiber with a bent region where the cladding is removed and the fiber is coated with poly-dimethylacrylamide (PDMAA). The combination of materials allows for a mass-production of the device by spray-coating and enables integration in disposable medical devices like oxygen masks, which we demonstrate here. We also present results of the application of an autocorrelation-based algorithm for respiratory frequency determination that is relevant for real applications of the device.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s17030517