Laser diagnostics of dynamic properties of blood

Nikolai N. Firsov

doi:10.1117/12.23763

1 September 1990 Laser diagnostics of dynamic properties of blood

Nikolai N. Firsov

Proceedings Volume 1353, First International Conference on Lasers and Medicine; (1990) https://doi.org/10.1117/12.23763
Event: First International Conference on Lasers and Medicine, 1990, Tashkent, Uzbekistan

Abstract

Laser Doppler velocimetry (LDV) and back scattering nephelometry techniques are used to study the dynamic properties of blood. These are determined significantly by the properties and the behavior of the erythrocytes in shear flow and are particularly manifested by the shapes of the velocity and of the concentration profiles of the directional streaming of blood in thin capillaries. These profiles are known to differ from those of simple homogeneous fluids. The potentialities of LDV are discussed to obtain the velocity profiles for the flow of the whole blood and of the erythrocytes suspensions at different hematocrites through horizontally positioned thin glass capillaries from 100 to 400 im in diameter. Possible artifacts are demonstrated inherent to LDV measurements of the velocity profiles due to the multiple scattering of laser light unavoidable in such thick layers of blood. Significant difference is experimentally obtained between the Brownian diffusion coefficient of the erythrocytes in suspension at the state of rest and their shear diffusion coefficient in the Couette flow. 1.

Citation Download Citation

Nikolai N. Firsov "Laser diagnostics of dynamic properties of blood", Proc. SPIE 1353, First International Conference on Lasers and Medicine, (1 September 1990); https://doi.org/10.1117/12.23763

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