Variety of disturbances of microcirculation can be stipulated by vasomotorial disfunction's of blood circulation in terminal vascular bed, changes of rheologic and coagulative characteristics of blood as well as morphological changes of structure of tissue and vessels of microcirculatory bed of destructed lower limb. In case of a varicose disease without complications changes of microvessels are considered to be compensatory adaptation. Patients suffering from a complicated type of varicose disease and post-thrombotic syndrome have "failure" of compensatory adaptation reaction. It results from significant functional disturbances of microcirculation and sudden morphological changes of structure of blood and lymphatic capillaries and tissue of a destructed lower limb. Correlative dependence can be found between degree of clinical evidences and a level of structural changes of microcirculatory bed. They are mostly significant in groups of patients having complicated varicose disease and post-thrombotic syndrome. It was shown that functional and morphological states of microcirculatory bed are of prognostic importance for estimation of effectiveness of operative interferences during diseases being analysed.
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J Biophotonics
November 2024
R&D Center of Biomedical Photonics, Orel State University, Orel, Russia.
This study explored the effects of 1267 nm laser irradiation on changes in blood flow parameters and activation of the regulatory mechanisms of the microcirculatory bed (MCB). Using laser Doppler flowmetry (LDF) technique and time-frequency analysis of perfusion signals, changes in the MCB of 16 healthy volunteers, targeting the distal phalanx of the third finger with 1267 nm laser irradiation were evaluated. Results indicated no significant differences in perfusion between control and target measurements, likely due to blood flow redistribution caused by vessel dilation/constriction.
View Article and Find Full Text PDFPhys Med Biol
November 2024
School of Engineering & Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
Georgian Med News
October 2024
Kharkiv National Medical University, Ukraine.
Unlabelled: Smoking is one of the most common harmful habits that can lead to the development of pathological processes in various organs and systems. At the same time, smoking in childhood and adolescence especially contributes to the deterioration of the general somatic condition, increases the risk and determines the severity of the course of respiratory diseases, which in the future has an impact on the development and functioning of the respiratory system, becomes the cause of dependent conditions and complicates the course of accompanying pathology. It is believed that disruption of the microcirculatory channel can be one of the key links in the development of pathological processes in the oral cavity.
View Article and Find Full Text PDFMicrocirculation
November 2024
Bioengineering Program, DeMatteis School of Engineering and Applied Science, Hofstra University, Hempstead, New York, USA.
Objective: Neovascularization has been extensively studied because of its significant role in both physiological processes and diseases. The significance of vascular microfluidic platforms lies in its essential role in recreating an in vitro environment capable of supporting cellular and tissue systems through the process of neovascularization. Biomechanical properties in a tissue engineered system use fluid flow and transport properties to recapitulate physiological systems.
View Article and Find Full Text PDFIntensive Crit Care Nurs
October 2024
Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China. Electronic address:
Background: Capillary refill time (CRT) is defined as the time taken for color to return to an external capillary bed after pressure is applied to cause blanching. Recent studies demonstrated the benefits of CRT in guiding fluid therapy for sepsis. However, lack of consistency among physicians in how to perform and interpret CRT has led to a low interobserver agreement for this assessment tool, which prevents its availability in sepsis clinical settings.
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