Compact system for in situ laser Doppler velocimetry of blood flow

Elise Bou 1 Aliou Ly 2 Julien Roul 3 Olivier Llopis 2 Christophe Vieu 1 Aline Cerf 1
1 LAAS-ELIA - Équipe Ingénierie pour les sciences du vivant
LAAS - Laboratoire d'analyse et d'architecture des systèmes
2 LAAS-MOST - Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications
LAAS - Laboratoire d'analyse et d'architecture des systèmes
3 LAAS-I2C - Service Instrumentation Conception Caractérisation
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : This work describes the implementation of a compact system allowing measurement of blood flow velocity using laser Doppler velocimetry in situ. The compact setup uses an optical fiber acting as an emitter and receptor of the signal. The signal is then recovered by a photodiode and processed using a spectrum analyzer. The prototype was successfully tested to measure microbead suspension and whole blood flow velocities in a fluidic chip. Fibers with hemispherical lenses with three different radius of curvature were investigated. This simple yet precise setup would enable the insertion of the fiber via a medical catheter to monitor blood flow velocity in non superficial vessels where previous reported techniques cannot be implemented.
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Elise Bou, Aliou Ly, Julien Roul, Olivier Llopis, Christophe Vieu, et al.. Compact system for in situ laser Doppler velocimetry of blood flow. Biomedical optics express, Optical Society - SOA Publishing, 2019, 10 (11), pp.5862. ⟨10.1364/BOE.10.005862⟩. ⟨hal-02341223⟩

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