&lt;title&gt;Influence of low-intensity laser radiation on human blood microcirculation&lt;/title&gt;

Korolevich, Alexander N.; Dubina, Natali S.; Vecherinski, Sergei I.

doi:10.1117/12.387140

Cited by 5 publications

(1 citation statement)

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“…2 LLL has a power of 0.001-0.1 W and a wavelength in the range of 300-10,600 nm, 3 with the LLL effect on the biological tissue using a nonthermal mechanism. [4][5][6][7] Its effect is created on a biological system, photochemically. 3,8 It also increases cell stimulation by increasing cellular metabolism, as it does not damage the hydrogen bonds in the tissues.…”

Section: Introductionmentioning

confidence: 99%

Comparative In Vitro Study: Examining 635 nm Laser and 265 nm Ultraviolet Interaction with Blood

Elblbesy

2019

Photobiomodulation, Photomedicine, and Laser Surgery

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Objective: This study represents a viable assessment of the effect of the low-level laser (LLL) of 635 nm and ultraviolet (UV) of 265 nm on biophysical properties of blood. Materials and methods: Blood samples were divided into two main groups: one for irradiation by LLL and the other for irradiation by UV. Each group was divided into three aliquots. First aliquot: whole blood was exposed to radiation. The second aliquot: erythrocytes were exposed to radiation and resuspended in autologous plasma. The third aliquot: plasma was exposed to radiation, and erythrocytes were resuspended in it. The following parameters were measured after irradiation by LLL and UV for all aliquots: whole blood viscosity, microscopic aggregation index, deformation index, and Zeta potential. Results: A decrease in whole blood viscosity due to irradiation by LLL was observed. To the contrary, an increase in whole blood viscosity due to irradiation by UV was detected. A significant reduction in erythrocytes' aggregation was observed as a result of LLL and UV radiation. Erythrocytes' deformability was strongly affected by UV radiation, while there was no significant effect from LLL. Another noticeable change observed was an increase in Zeta potential due to UV and a decrease in Zeta potential values, as a result of LLL irradiation. Conclusions: It can be concluded from this study that LLL and UV can be used to change some biological processes, as well as cellular properties.

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Section: Introductionmentioning

confidence: 99%

Comparative In Vitro Study: Examining 635 nm Laser and 265 nm Ultraviolet Interaction with Blood

Elblbesy

2019

Photobiomodulation, Photomedicine, and Laser Surgery

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Robotic Polarimetry System Based on Image Sensors for Monitoring the Rheological Properties of Blood in Emergency Situations

Khlynov

Ryzhova

Konyakhin

et al. 2022

Studies in Systems, Decision and Control

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Erythrocyte sedimentation rate of human blood exposed to low-level laser

et al. 2016

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This study is designed to investigate in vitro low-level laser (LLL) effects on rheological parameter, erythrocyte sedimentation rate (ESR), of human blood. The interaction mechanism between LLL radiation and blood is unclear. Therefore, research addresses the effects of LLL irradiation on human blood and this is essential to understanding how laser radiation interacts with biological cells and tissues. The blood samples were collected through venipuncture into EDTA-containing tubes as an anticoagulant. Each sample was divided into two equal aliquots to be used as a non-irradiated sample (control) and an irradiated sample. The aliquot was subjected to doses of 36, 54, 72 and 90 J/cm(2) with wavelengths of 405, 589 and 780 nm, with a radiation source at a fixed power density of 30 mW/cm(2). The ESR and red blood cell count and volume are measured after laser irradiation and compared with the non-irradiated samples. The maximum reduction in ESR is observed with radiation dose 72 J/cm(2) delivered with a 405-nm wavelength laser beam. Moreover, no hemolysis is observed under these irradiation conditions. In a separate protocol, ESR of separated RBCs re-suspended in irradiated plasma (7.6 ± 2.3 mm/h) is found to be significantly lower (by 51 %) than their counterpart re-suspended in non-irradiated plasma (15.0 ± 3.7 mm/h). These results indicate that ESR reduction is mainly due to the effects of LLL on the plasma composition that ultimately affect whole blood ESR.

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<title>Influence of low-intensity laser radiation on human blood microcirculation</title>

Cited by 5 publications

References 0 publications

Comparative In Vitro Study: Examining 635 nm Laser and 265 nm Ultraviolet Interaction with Blood

Comparative In Vitro Study: Examining 635 nm Laser and 265 nm Ultraviolet Interaction with Blood

Robotic Polarimetry System Based on Image Sensors for Monitoring the Rheological Properties of Blood in Emergency Situations

Erythrocyte sedimentation rate of human blood exposed to low-level laser

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