title: Ð¡Ð¿ÐµÐºÐ»-ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ð¾Ð½Ð½ÑÐ¹ Ð´Ð°ÑÑÐ¸Ðº Ð´Ð»Ñ Ð´ÐµÑÐµÐºÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐºÐ¾ÑÐ¾ÑÑÐ¸ Ð¼Ð¸ÐºÑÐ¾ÑÐ¸ÑÐºÑÐ»ÑÑÐ¾ÑÐ½Ð¾Ð³Ð¾ ÐºÑÐ¾Ð²Ð¾ÑÐ¾ÐºÐ°
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Speckle-correlation sensor for detecting the speed of microcirculatory blood flow
Creators: name: ÐÑÐ´Ð·Ð»Ð¾Ð²ÐµÐ½ÐºÐ¾, ÐÐ¸ÐºÐ¸ÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: ÑÐ¿ÐµÐºÐ»-ÐºÐ¾ÑÑÐµÐ»ÑÑÐ¸Ð¾Ð½Ð½ÑÐ¹ Ð¼ÐµÑÐ¾Ð´
Ð¼Ð¸ÐºÑÐ¾ÑÐ¸ÑÐºÑÐ»ÑÑÐ¾ÑÐ½Ð¾Ðµ ÑÑÑÐ»Ð¾
ÐºÑÐ¾Ð²Ð¾ÑÐ¾Ðº
ÐºÐ°Ð¿Ð¸Ð»Ð»ÑÑÐ½Ð¾Ðµ ÑÑÑÐ»Ð¾
Ð¼ÐµÐ´Ð¸ÑÐ¸Ð½ÑÐºÐ°Ñ Ð´Ð¸Ð°Ð³Ð½Ð¾ÑÑÐ¸ÐºÐ°
speckle-correlation method
micro-circular bed
bleed
capillary bed
medical diagnostics

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description: This work is devoted to the creation of a sensor related to the field of medical diagnostics and technology for measuring blood flow velocity or the study of the circulatory system in a non-invasive way. The aim of the work is to develop a sensor for daily monitoring of blood flow velocity using the speckle-correlation method. In this paper, a literature review of the most famous and promising methods for measuring microcirculation parameters is carried out. The physical and mathematical principles of speckle correlation analysis, the measurement setup of which has the simplest technical equipment, are considered. To measure blood flow velocity, a schematic diagram of a correlation sensor for remote measurement was developed, the main structural elements of which are a laser radiation source, a lens and a multimode optical fiber that collects information scattered from moving red blood cells with further digitization on an ADC and transfer to a computer for further processing. Due to the fact that the recorded signals are quasi-random in nature, an autocorrelation function was used to process them, from which the correlation time was determined from the 1 / e level and the blood flow velocity was calculated using the J. Briers formula. The speed of capillary blood flow directly depends on the state of the microvasculature, knowing this fact, doctors will be able to diagnose and monitor the condition of the capillary and circulatory system of a person as a whole at an early stage.