Optical Fibre-Based Pulse Oximetry Sensor with Contact Force Detection.

ABSTRACT: A novel optical sensor probe combining monitoring of blood oxygen saturation (S_pO₂) with contact pressure is presented. This is beneficial as contact pressure is known to affect S_pO₂ measurement. The sensor consists of three plastic optical fibres (POF) used to deliver and collect light for pulse oximetry, and a fibre Bragg grating (FBG) sensor to measure contact pressure. All optical fibres are housed in a biocompatible epoxy patch which serves two purposes: (i) to reduce motion artefacts in the photoplethysmogram (PPG), and (ii) to transduce transverse loading into an axial strain in the FBG. Test results show that using a combination of pressure measuring FBG with a reference FBG, reliable results are possible with low hysteresis which are relatively immune to the

SUBMITTER: Liu C 

PROVIDER: S-EPMC6263952 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature