Volume 11, Issue 12 e201800195
FULL ARTICLE

Control of optical transparency and infrared laser heating of costal cartilage via injection of iohexol

Yulia M. Alexandrovskaya

Corresponding Author

Yulia M. Alexandrovskaya

Institute of Photon Technologies, Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences, Moscow, Russia

Correspondence

Yulia M. Alexandrovskaya, Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics" of the Russian Academy of Sciences, Pionerskaya St. 2, 142190 Troitsk, Moscow, Russia.

Email: [email protected]

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Evgeniy G. Evtushenko

Evgeniy G. Evtushenko

M.V. Lomonosov Moscow State University, Moscow, Russia

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Mariya M. Obrezkova

Mariya M. Obrezkova

M.V. Lomonosov Moscow State University, Moscow, Russia

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Valery V. Tuchin

Valery V. Tuchin

Research-Educational Institute of Optics and Biophotonics, Saratov State University, Saratov, Russia

Laboratory of Laser Diagnostics of Technical and Living Systems, Institute of Precision Mechanics and Control RAS, Saratov, Russia

Interdisciplinary Laboratory of Biophotonics, Tomsk State University, Tomsk, Russia

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Emil N. Sobol

Emil N. Sobol

Institute of Photon Technologies, Federal Scientific Research Centre “Crystallography and Photonics” of the Russian Academy of Sciences, Moscow, Russia

IPG Medical Corporation, Marlborough, Massachusetts

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First published: 25 July 2018
Citations: 11
Funding information Federal Agency of Scientific Organizations , Grant/Award Number: 007-ГЗ/Ч3363/26; Program of Fundamental Research of the Presidium of the RAS, Grant/Award Number: 32; RF MES, Grant/Award Number: 17.1223.2017/AS; Russian Foundation for Basic Research, Grant/Award Number: 15-29-04810

Abstract

Infrared (IR) laser impact has no analogues for rapid and safe cartilage reshaping. For better penetration of radiation optical clearing agents (OCAs) can be applied. In present work, the effect of low-osmolality agent iohexol on costal cartilage is studied. Specifically, it is shown that ½ of total increase of optical transparency occurs in 20 minutes of immersion. Maximally, cartilage transparency on 1560 nm can be increased in 1.5 times. Injection of iohexol results in increased tissue hygroscopicity, lower drying rate and higher percentage of bound water. Effective diffusion coefficients of water liberation at 21°C are (5.3 ± 0.4) × 10−7 and (3.3 ± 0.1) × 10−7 cm2/s for untreated and iohexol-modified tissue, respectively. Raman spectroscopy of irradiated iohexol solution reveals its photo and thermo-stability under clinically used IR laser energies up to 350 W/cm2 for exposure times of several seconds. At energies higher than 500 W/cm2 [Correction added on 5 September 2018, after first online publication: This unit has been changed] decomposition of iohexol occurs rapidly through formation of molecular iodine and fluorescent residue.

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