Investigating blood microcirculation by the method of computer capillaroscopy
- Paper number
IAC-06-E2.2.03
- Author
Mrs. Anna Antonyuk, Moscow Aviation Institute (MAI), Russia
- Year
2006
- Abstract
In spaceflight conditions the blood flow in capillary channel of a human is subject to great change. The object of investigation - skin capillaries, changes which vividly depict the condition of microcircular channel of a whole body. The hardware - a modeled pattern of computer capillaroscope, needed to monitor blood microcirculation within capillaries of nail bed of human's hand. In visual capillaroscopy the nail bed is investigated where it is possible to observe a group of capillary loops with a density of 20-65 per 1 quadratic mm, containing of arterial, venous and transitional compartments. Capillaries images seen under microscope by TV-camera are input in calculator. After processing the calculator forms the data on capillaries sizes, their velocity and blood circulation character, the presence of glued blood aggregations. The analysis of capillary blood circulation is conducted basing on automated program processing of video sequences (live video), including TV-image capillaries of hand fingers nail bed with moving blood. Geometric sizes of image elements are subject to analyzing. They are: 1. wideness of capillary channel in arterial, venous and transitional compartments; 2. linear size of perivascular area, as well as dynamic parameters of capillary blood circulation; 3. blood circulation velocity; 4. number of aggregations per time unit; The analysis of abovementioned parameters is conducted with the help of special software, including the programs for: 1. manual measurement of geometric sections on static image; 2. automated evaluation of the wideness of arterial, venous and transitional compartments of capillary image; 3. automated evaluation of blood circulation velocity and the frequency of blood aggregation appearance; 4. manual evaluation of immediate blood circulation velocity. At present the methods for computer capillaroscopy for conduction of functional-loaded test in microgravity conditions is developed.
- Abstract document