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Low-Cost Miniature Fiber-Optic Extrinsic Fabry-Perot Interferometric Pressure Sensor
for Biomedical Applications
[European Conference on Biomedical Optics, 2013]
Sven Poeggel, Daniele Tosi, Gabriel Leen, Elfed Lewis
University of Limerick, IrelandOptical Fibre Sensors Research Centre (OFSRC)
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Problem
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
In-vivo pressure measurementHigh accuracy (1 mmHg or below)Minimum invasiveness (size, weight)Low-cost disposable probeImmunity to EMI
FIBER-OPTIC
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Extrinsic FP Interferometer
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
EFPI: Fiber-optic Fabry-Perot interferometric sensor based on all-silica glass structure: (1) launch fiber, (2) diaphragm, (3) capillary + FBG
Capillary
Launch SM fiber
Diaphragm MM fiber
AIR-GAP
dL
FiberBragg
Grating(FBG)
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Air-gap length LFP Spectrum ~ S0 + k cos[4πL/λ]
d Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
EFPI principle
L
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Pressure
Air-gap length L = L0 - Sp ΔPFP Spectrum ~ S0 + k cos[4π(L - Sp
ΔP)/λ]Temperature: L = L0 - Sp ΔP + ST ΔT ⇒ FBG
L0 - Sp ΔP
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
EFPI principle
L
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EFPI/FBG spectrum
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
EFPI
FBG
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FBG FBG detectiondetection
EFPI/FBG system
ASE sourceASE source
SpectrometeSpectrometerr
1530-1600 nm
1520-1596 nm
CouplerCoupler
3 dB1x4 switch
ServerServer
EFPI
EFPI
EFPI
EFPI+FBG
DAQ DAQ (LabVIEW)(LabVIEW) Pressure
Temperature
} Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
EFPI EFPI detectiondetection
Probe Probe calibrationcalibration
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Performance chartUL
EFPI/FBGDruck
DPI 601
St. JudePressureW
ire
Opsens OPP-M
Technology
Fiber optic,
EFPI/FBGFluidic Guidewire
Fiber optic, EFPI
Diameter 0.2 mm (>1 mm) 0.35 mm 0.55 mm
Accuracy 0.2 mmHg 2 mmHg 2 mmHg 2 mmHg
Speed 100 Hz 50 Hz 25 Hz 20/250 Hz
Stability0.6
mmHg/hr2.6
mmHg/hr>5
mmHg/hr4.0
mmHg/hr
Temperature
Compens. 0.5°C
None None None
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
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Burette test
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
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Burette test
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
RMSE = 2.29 mmH2O = = 0.21 mmHg
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Heart simulator
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
Heart simulator
Interrogator/processing
Heart pumping
Sensor positioning
(short access)
EFPI spectrumPressure meas.
Spectrometer
ASE source
Heart pumping inle
tFiber inlet
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Heart simulator
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Time (s)
Pressure (mmHg)
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Ventricular assist
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
Polymer Core,Cleveland Clinic, US
Mar 2013FPI positioningVentricular
assist
Reference (fluidic)
Pressure readout
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Ventricular assist
Daniele Tosi - Optical Fibre Sensors Research Centre (OFSRC) - University of Limerick
Pressure (mmHg)
QuickTime™ and a decompressor
are needed to see this picture.
QuickTime™ and a decompressor
are needed to see this picture.
Polymer Core,Cleveland Clinic, US
Mar 2013
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Daniele Tosi - Optical Fibre Sensors Research Centre - project portfolio - UL2013
Urodynamics
InterrogatorInterrogator
Differential pressure measurement
Bladder outlet obstruction (BOO) diagnostic
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Daniele Tosi - Optical Fibre Sensors Research Centre - project portfolio - UL2013
Other applicationsRobotic surgeryPressure force sensors - 2D/3D1mmHg accuracy, stability over several hours Miniature size ⍉ 125/80/(40) μm
Intra-aortic balloon (IAB) pumpingInstantaneous pressure detection1mmHg accuracy, stability over long operation timeSize, form factor, redundancy, placement (⍉ 200 μm)
Intra-chranial pressure (ICP)ICP 1 to 20 mmHg
≲0.1 mmHg accuracy, stability over minutes
Miniature size ⍉ 200/125/80 μm
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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