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Article type: Research Article
Authors: Lenasi, Helenaa; * | Potočnik, Nejkaa | Petrishchev, Nikolajb | Papp, Marinac | Egorkina, Anastasiad | Girina, Marinad; * | Skedina, Marinae | Kovaleva, Annae
Affiliations: [a] Institute of Physiology, Medical Faculty, University of Ljubljana, Ljubljana, Slovenia | [b] Saint-Petersburg I.P. Pavlov State Medical University (PSPbGMU), St. Petersburg, Russia | [c] North-West State Medical University, L.G. Sokolov Clinical Hospital No122, St. Petersburg, Russia | [d] SPMinimaxLtd, St. Petersburg, Russia | [e] State Scientific Center of the Russian Federation Institute of Biomedical Problems RAS, Moscow, Russia
Correspondence: [*] Corresponding author: Helena Lenasi, Institute of Physiology, Medical Faculty, University of Ljubljana, Slovenia, Zaloška 4, 1000 Ljubljana. Tel.: +386 1 543 7513; Fax: +386 1 543 7501; E-mail: helena.lenasi.ml@mf.uni-lj.si and Marina Girina, 34 Petrogradskaya Emb. 197101, St. Petersburg, Russia. E-mail: mgirina7@gmail.com.
Abstract: We aimed to evaluate hemodynamic parameters in the cutaneous microcirculation during recovery to graded dynamic exercise performed on a cycloergometer by using two distinctive methods: high-frequency ultrasound Doppler flowmetry (UDF) and laser Doppler fluxmetry (LDF). Regarding UDF, the medium linear blood flow velocity (Vam) was estimated, expressed in absolute units (cm/s) whereas blood flow assessed by LDF was registered in arbitrary perfusion units (PU). We compared the corresponding perfusion values obtained by UDF and LDF, respectively, every 20 s during recovery period to physical exercise. Three types of microvascular blood flow dynamics were recorded: blood flow with an occasional paroxysm, a pulsatile blood flow pattern, and a shunting-type blood flow pattern. In the first type, the reaction time of registration and the direction of changes of UDF and LDF values coincided in 77.7%, exhibiting high correlation (r = 0.77; p≤0.001). In the second type, the direction of changes of UDF and LDF showed 85.0% similarity and a moderate correlation (r = 0.66; p = 0.0015), whereas in the third type, there was also a moderate correlation (r = 0.53, p = 0.0024). Our pilot experiments have shown that UDF could be regarded as a comparable substitutional method to LDF for studying skin microcirculation.
Keywords: Microcirculation, high-frequency Doppler sonography, ultrasound Doppler flowmetry, laser Doppler fluxmetry, physical exercise
DOI: 10.3233/CH-16204
Journal: Clinical Hemorheology and Microcirculation, vol. 65, no. 4, pp. 373-381, 2017
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