[Features of the coefficient of variation of hematological indicators in persons of middle, elderly and senile age with pneumonia.].

Pneumonia is the leading mortality rate among all infectious diseases. It has been established that the reliable risk group for morbidity and mortality from this nosology includes persons over 60 years of age, and with age the severity of the disease only increases. According to literary data, one of the reasons for the decline in adaptation capabilities of older persons is the phenomenon of «age desinhronosis», which manifests itself in significant fluctuations in the parameters of the internal environment of the body.

Influence of exogenous and endogenous factors on the quality of the preanalytical stage of laboratory tests (review of literature).

A literature review in the article presents an analysis of the influence of endogenous and exogenous factors on quality of preanalytical phase of laboratory testing. The review shows significance of external and internal factors influencing blood samples at preanalytical phase of laboratory testing. Among the exogenous factors considered: phlebotomy, test tubes for samples, transportation and storage.

[Features of the picture of blood cells in elderly persons with primary open-angle glaucoma.].

Around 1,3 billion people live worldwide with visual analyzer disorders such as glaucoma and cataract. These diseases are particularly common among the elderly. From glaucoma every year 10 million people completely lose vision, one of the factors of which is untimely diagnosis.

Combined laser variosystems paraxial design for longitudinal movement of a Gaussian beam waist.

Optical variosystems that form the required diameter of the Gaussian beam waist and perform its smooth longitudinal movement with a constant diameter for laser technologies, processing materials, moving microobjects, etc., are considered. A combined method based on a movable tunable-focus lens for changing the optical characteristics of laser variosystems is proposed.

[Plasma D-dimer volume as a subclinical marker of thrombotic risk in elderly patients with atrial fibrillation.].

Aged patients with atrial fibrillation (AF) are at high risk of both thromboembolic and haemorrhagic complications of disease and of its treatment. A study was provided to assess the role of D-dimer plasma level as a marker of thrombosis in aged patients with AF having no clinical signs of active thrombosis depending on used treatment strategy and quantitative thrombotic and haemorrhagic risk of AF. The results show that D-dimer plasma levels correlate with scores of thromboembolic and haemorrhagic risks in group on antiplatelet agents but not anticoagulants, with the difference in D-dimer level driven by subgroup on CHA2DS2-VASc score ≥5.