Optical Fibre-Based Pulse Oximetry Sensor with Contact Force Detection
A novel optical sensor probe combining monitoring of blood oxygen saturation (S O₂) with contact pressure is presented. This is beneficial as contact pressure is known to affect S O₂ measurement. The sensor consists of three plastic optical fibres (POF) used to deliver and collect light for pulse ox...
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Published in | Sensors (Basel, Switzerland) Vol. 18; no. 11; p. 3632 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
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26.10.2018
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Abstract | A novel optical sensor probe combining monitoring of blood oxygen saturation (S
O₂) with contact pressure is presented. This is beneficial as contact pressure is known to affect S
O₂ 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 effects of temperature. The sensor is used to measure the S
O₂ of ten volunteers under different contact pressures with perfusion and skewness indices applied to assess the quality of the PPG. The study revealed that the contact force ranging from 5 to 15 kPa provides errors of <2%. The combined probe has the potential to improve the reliability of reflectance oximeters. In particular, in wearable technology, the probe should find use in optimising the fitting of garments incorporating this technology. |
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AbstractList | A novel optical sensor probe combining monitoring of blood oxygen saturation (S
O₂) with contact pressure is presented. This is beneficial as contact pressure is known to affect S
O₂ 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 effects of temperature. The sensor is used to measure the S
O₂ of ten volunteers under different contact pressures with perfusion and skewness indices applied to assess the quality of the PPG. The study revealed that the contact force ranging from 5 to 15 kPa provides errors of <2%. The combined probe has the potential to improve the reliability of reflectance oximeters. In particular, in wearable technology, the probe should find use in optimising the fitting of garments incorporating this technology. A novel optical sensor probe combining monitoring of blood oxygen saturation (SpO₂) with contact pressure is presented. This is beneficial as contact pressure is known to affect SpO₂ 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 effects of temperature. The sensor is used to measure the SpO₂ of ten volunteers under different contact pressures with perfusion and skewness indices applied to assess the quality of the PPG. The study revealed that the contact force ranging from 5 to 15 kPa provides errors of <2%. The combined probe has the potential to improve the reliability of reflectance oximeters. In particular, in wearable technology, the probe should find use in optimising the fitting of garments incorporating this technology. A novel optical sensor probe combining monitoring of blood oxygen saturation (SpO2) with contact pressure is presented. This is beneficial as contact pressure is known to affect SpO2 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 effects of temperature. The sensor is used to measure the SpO2 of ten volunteers under different contact pressures with perfusion and skewness indices applied to assess the quality of the PPG. The study revealed that the contact force ranging from 5 to 15 kPa provides errors of <2%. The combined probe has the potential to improve the reliability of reflectance oximeters. In particular, in wearable technology, the probe should find use in optimising the fitting of garments incorporating this technology. A novel optical sensor probe combining monitoring of blood oxygen saturation (S p O 2 ) with contact pressure is presented. This is beneficial as contact pressure is known to affect S p O 2 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 effects of temperature. The sensor is used to measure the S p O 2 of ten volunteers under different contact pressures with perfusion and skewness indices applied to assess the quality of the PPG. The study revealed that the contact force ranging from 5 to 15 kPa provides errors of <2%. The combined probe has the potential to improve the reliability of reflectance oximeters. In particular, in wearable technology, the probe should find use in optimising the fitting of garments incorporating this technology. |
Author | Morgan, Stephen P Liu, Chong Correia, Ricardo Hayes-Gill, Barrie R Korposh, Serhiy Ballaji, Hattan Khaled |
AuthorAffiliation | Optics and Photonics Group, Faculty of Engineering, University Park, Nottingham NG7 2RD, UK; chong.liu@nottingham.ac.uk (C.L.); Ricardo.GoncalvesCorreia@nottingham.ac.uk (R.C.); hattan.ballaji@nottingham.ac.uk (H.K.B.); S.Korposh@nottingham.ac.uk (S.K.); barrie.hayes-gill@nottingham.ac.uk (B.R.H.-G.) |
AuthorAffiliation_xml | – name: Optics and Photonics Group, Faculty of Engineering, University Park, Nottingham NG7 2RD, UK; chong.liu@nottingham.ac.uk (C.L.); Ricardo.GoncalvesCorreia@nottingham.ac.uk (R.C.); hattan.ballaji@nottingham.ac.uk (H.K.B.); S.Korposh@nottingham.ac.uk (S.K.); barrie.hayes-gill@nottingham.ac.uk (B.R.H.-G.) |
Author_xml | – sequence: 1 givenname: Chong orcidid: 0000-0002-2340-4329 surname: Liu fullname: Liu, Chong email: chong.liu@nottingham.ac.uk organization: Optics and Photonics Group, Faculty of Engineering, University Park, Nottingham NG7 2RD, UK. chong.liu@nottingham.ac.uk – sequence: 2 givenname: Ricardo orcidid: 0000-0001-6405-5340 surname: Correia fullname: Correia, Ricardo email: Ricardo.GoncalvesCorreia@nottingham.ac.uk organization: Optics and Photonics Group, Faculty of Engineering, University Park, Nottingham NG7 2RD, UK. Ricardo.GoncalvesCorreia@nottingham.ac.uk – sequence: 3 givenname: Hattan Khaled surname: Ballaji fullname: Ballaji, Hattan Khaled email: hattan.ballaji@nottingham.ac.uk organization: Optics and Photonics Group, Faculty of Engineering, University Park, Nottingham NG7 2RD, UK. hattan.ballaji@nottingham.ac.uk – sequence: 4 givenname: Serhiy orcidid: 0000-0001-5179-6991 surname: Korposh fullname: Korposh, Serhiy email: S.Korposh@nottingham.ac.uk organization: Optics and Photonics Group, Faculty of Engineering, University Park, Nottingham NG7 2RD, UK. S.Korposh@nottingham.ac.uk – sequence: 5 givenname: Barrie R orcidid: 0000-0003-4237-7001 surname: Hayes-Gill fullname: Hayes-Gill, Barrie R email: barrie.hayes-gill@nottingham.ac.uk organization: Optics and Photonics Group, Faculty of Engineering, University Park, Nottingham NG7 2RD, UK. barrie.hayes-gill@nottingham.ac.uk – sequence: 6 givenname: Stephen P orcidid: 0000-0003-4069-3801 surname: Morgan fullname: Morgan, Stephen P email: steve.morgan@nottingham.ac.uk organization: Optics and Photonics Group, Faculty of Engineering, University Park, Nottingham NG7 2RD, UK. steve.morgan@nottingham.ac.uk |
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Cites_doi | 10.1364/BOE.5.002537 10.1147/sj.393.0840 10.1007/BF03018586 10.1007/BF01617518 10.3390/electronics3020282 10.1109/TBME.2009.2039568 10.1364/OE.21.017464 10.1117/1.JBO.18.10.108001 10.1117/1.3598858 10.1007/s10877-012-9335-3 10.1088/0967-3334/28/3/R01 10.1007/s10439-005-9068-2 10.3390/s150717076 10.1117/1.OE.56.11.117111 10.3174/ajnr.A2827 10.1088/0967-3334/25/5/020 10.3390/bioengineering3040021 10.1016/j.icte.2016.10.004 10.1117/1.OE.55.2.026120 10.1109/TIM.2011.2175832 10.1049/el:20081001 10.1016/S0002-9378(94)70116-4 10.1016/j.cmpb.2011.03.019 10.1177/1045389X10377676 |
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Keywords | pulse oximetry photoplethysmography signal quality index oxygen saturation fibre Bragg grating contact pressure plastic optical fibre |
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References | ref13 ref12 ref15 ref14 Tamura (ref30) 2017 ref31 ref11 ref10 ref32 ref1 Webster (ref2) 1997 ref17 ref16 ref19 ref18 Correia (ref21) 2016; 9916 ref24 ref23 ref26 ref25 ref20 ref22 ref28 ref27 ref29 ref8 ref7 ref9 ref3 ref6 ref5 Babikir (ref4) 2015; 16 |
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Snippet | A novel optical sensor probe combining monitoring of blood oxygen saturation (S
O₂) with contact pressure is presented. This is beneficial as contact pressure... A novel optical sensor probe combining monitoring of blood oxygen saturation (SpO2) with contact pressure is presented. This is beneficial as contact pressure... A novel optical sensor probe combining monitoring of blood oxygen saturation (SpO₂) with contact pressure is presented. This is beneficial as contact pressure... A novel optical sensor probe combining monitoring of blood oxygen saturation (S p O 2 ) with contact pressure is presented. This is beneficial as contact... |
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SubjectTerms | contact pressure fibre Bragg grating oxygen saturation photoplethysmography plastic optical fibre pulse oximetry signal quality index |
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Title | Optical Fibre-Based Pulse Oximetry Sensor with Contact Force Detection |
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