Abstract. Functions of automatic closed type blood analyzer are defined; structure of such an analyzer is developed. The analyzer is expected to significantly improve the quality, reliability and reproducibility of the clinical research results, as well as to standardize and unify the process of research and to exclude the "human factor". Comparative analysis of the analyzer to be designed with analogues demonstrate that  automated systems for clinical diagnostics developed by domestic producers do not meet all requirements of the modern market, and foreign developments are highly specialized and do not allow to solve the whole complex of tasks in clinical research. Production of automated systems for immunosorbent assay is shown to be a relevant and promising task. The proposed block diagram was developed to provide implementation of the required functions within minimized weight and size parameters; an element base of the blood analyzer is selected. A reasonable choice of executive and measuring devices, the equipment flushing system, and reagents dispensing system is presented.

Keywords: automation system, blood analyzer, devices for clinical research, medical equipment

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