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University of Limerick - European Conference on Biomedical Optics - EFPI presentation

University of Limerick - European Conference on Biomedical Optics - EFPI presentation

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  • 1. Low-Cost Miniature Fiber-Optic Extrinsic Fabry-PerotInterferometric Pressure Sensor for BiomedicalApplications[European Conference on Biomedical Optics, 2013]Sven Poeggel, Daniele Tosi, Gabriel Leen, Elfed LewisUniversity of Limerick, IrelandOptical Fibre Sensors Research Centre (OFSRC)
  • 2. ProblemDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickIn-vivo pressure measurementHigh accuracy (1 mmHg or below)Minimum invasiveness (size, weight)Low-cost disposable probeImmunity to EMIFIBER-OPTIC
  • 3. Extrinsic FPInterferometerDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPI: Fiber-optic Fabry-Perot interferometric sensor based on all-silica glass structure: (1) launch fiber, (2) diaphragm, (3) capillary +FBGCapillaryLaunch SMfiberDiaphragmMM fiberAIR-GAPdLFiberBraggGrating(FBG)
  • 4. Air-gap length LFP Spectrum ~ S0 + k cos[4πL/ ]λdDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPI principleL
  • 5. PressureAir-gap length L = L0 - Sp PΔFP Spectrum ~ S0 + k cos[4π(L - Sp PΔ )/ ]λTemperature: L = L0 - Sp P + SΔ T TΔ ⇒ FBGL0 - Sp PΔDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPI principleL
  • 6. EFPI/FBG spectrumDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPIFBG
  • 7. FBG detectionFBG detectionEFPI/FBG systemASE sourceASE sourceSpectrometerSpectrometer1530-1600 nm1520-1596 nm CouplerCoupler3 dB1x4 switchServerServerEFPIEFPIEFPIEFPI+FBGDAQDAQ(LabVIEW)(LabVIEW) PressureTemperature}Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickEFPI detectionEFPI detectionProbeProbecalibrationcalibration
  • 8. Performance chartUL EFPI/FBGDruckDPI 601St. JudePressureWireOpsensOPP-MTechnologyFiber optic,EFPI/FBGFluidic GuidewireFiber optic,EFPIDiameter 0.2 mm (>1 mm) 0.35 mm 0.55 mmAccuracy 0.2 mmHg 2 mmHg 2 mmHg 2 mmHgSpeed 100 Hz 50 Hz 25 Hz 20/250 HzStability 0.6 mmHg/hr 2.6 mmHg/hr >5 mmHg/hr 4.0 mmHg/hrTemperatureCompens.0.5°CNone None NoneDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
  • 9. Burette testDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
  • 10. Burette testDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickRMSE = 2.29 mmH2O == 0.21 mmHg
  • 11. Heart simulatorDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickHeart simulatorInterrogator/processingHeart pumpingSensor positioning(short access)EFPI spectrumPressure meas.SpectrometerASE sourceHeart pumpinginletFiber inlet
  • 12. Heart simulatorDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickQuickTime™ and adecompressorare needed to see this picture.QuickTime™ and adecompressorare needed to see this picture.Time (s)Pressure (mmHg)
  • 13. Ventricular assistDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickPolymer Core,Cleveland Clinic, USMar 2013FPI positioningVentricular assistReference (fluidic)Pressure readout
  • 14. Ventricular assistDaniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of LimerickPressure (mmHg)QuickTime™ and adecompressorare needed to see this picture.QuickTime™ and adecompressorare needed to see this picture.Polymer Core,Cleveland Clinic, USMar 2013
  • 15. Daniele Tosi - Optical Fibre Sensors Research Centre - project portfolio - UL2013UrodynamicsInterrogatorInterrogatorDifferential pressure measurementBladder outlet obstruction (BOO) diagnostic
  • 16. Daniele Tosi - Optical Fibre Sensors Research Centre - project portfolio - UL2013Other applicationsRobotic surgeryPressure force sensors - 2D/3D1mmHg accuracy, stability over several hoursMiniature size ⍉ 125/80/(40) mμIntra-aortic balloon (IAB) pumpingInstantaneous pressure detection1mmHg accuracy, stability over long operation timeSize, form factor, redundancy, placement (⍉ 200 m)μIntra-chranial pressure (ICP)ICP 1 to 20 mmHg≲0.1 mmHg accuracy, stability over minutesMiniature size ⍉ 200/125/80 mμ
  • 17. Acknowledgments‣ Cleveland Clinic and Pointec Medical‣ FP7 Marie Curie (299985-PROBESENSE)‣ Science Foundation Ireland (RFP/ECE2898)‣ Enterprise Ireland (IP-2012-0166-Y)‣ University of Limerick, MSSI and CES depts.Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick