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Evaluation of blood optical properties in the wavelength range of 1.3–2.0 µm

https://doi.org/10.37895/2071-8004-2019-23-2-44-51

Abstract

Purpose. To find out the ratio of laser light absorption coefficients µа in water and in blood and the effective attenuation coefficient of radiation µeff in blood in the wavelength range of 1.3–2.0 µm. Absorption coefficients were experimentally measured for blood modeling solutions of oksi- and methemoglobin with concentration corresponding to hematocrit Hct ≈ 50%. The performed estimations confirmed that absorption in water exceeds absorption in blood close to local maxima of laser light absorption which correspond to wavelengths 1.45 and 1.94 µm. The obtained dependences allow to define the depth of effective impact of superficial laser irradiation of studied wavelengths at biotissues. They also allow to find out dimensions of areas in which laser radiation is absorbed in blood under interstitial irradiation and to find out distribution of absorbed energy amounts in water and in hemoglobin.

About the Authors

A. A. Marchenko
«IRE-Polus» Ltd
Russian Federation


V. P. Minaev
«IRE-Polus» Ltd
Russian Federation


I. V. Smirnov
LLC «Agat-Med»
Russian Federation


E. D. Shevelkina
«IRE-Polus» Ltd
Russian Federation


References

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Review

For citations:


Marchenko A.A., Minaev V.P., Smirnov I.V., Shevelkina E.D. Evaluation of blood optical properties in the wavelength range of 1.3–2.0 µm. Laser Medicine. 2019;23(2):44-51. (In Russ.) https://doi.org/10.37895/2071-8004-2019-23-2-44-51

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ISSN 2071-8004 (Print)
ISSN 2686-8644 (Online)