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The goal is to discuss the criteria for the early diagnosis of chronic kidney disease (CKD) in children. The article presents data from modern literature on the epidemiology, classification, and criteria for the diagnosis of CKD, own scientific results on clinical and paraclinical characteristics of CKD and regional characteristics of CKD in children of the Orenburg region. Modern approaches to the early diagnosis of CKD in children, the identification of risk factors for the progression of nephropathy and the algorithm for the diagnosis of CKD in childhood, taking into account unfavorable regional factors, are scientifically substantiated. A set of measures for the prevention of nephropathy and a scheme of follow-up observation of children at high risk has been developed. The ways to improve the children's nephrology service are substantiated. Modern pathogenetic approaches to the diagnosis of CKD in children are presented. An algorithm for diagnosing the initial stages of CKD in children at risk for CKD and children with renal pathology without CKD with a preliminary selection of anamnestic and clinical and paraclinical indicators is proposed.

C.A. Чецнокова НАУЧНАЯ ШКОЛА КАР ЛА ПЮДВИГА И ЕЕ ВКЛАД В РАЗВИТИЕ ФИЗИОЛОГИИ И МЕДИЦИНЫ В 19 СТОЛЕТИИ Ha протяжении второй половины Х|Х в. в физиологической науке произошел коренной сдвиг в сторону ускорения ее развития. Используя термин Т.Куна П], можно рассматривать этот сдвиг как результат формирования новой парадигмы: экспериментального аналитического физико-химического направления, эффективность которого оказалась очень высокой. В становлении нового направления большую роль сыграли научные школы известных немецких физиологов: Карла Аюдвига‚ Эмиля Аюбуа Реймона, Германа Г ельмгольца, Эрнеста Брюкке. Нами [2,4]‚ много лет изучалась история русско-немецкого научною сотрудничества в физиологии. В литературе этот вопрос не получил достаточного освещения.

The article presents an analysis of fundamental data on the problem of stress and its role in the development of stressful diseases. Scientific evidence on the role of stress in childhood pathology indicates the extreme pathogenetic significance of stress. It is proved that stress has three interconnected faces: stress as a link in the adaptation mechanism, stress as a link in the pathogenesis of diseases and adaptation to stressful situations as a natural prevention of stressful diseases. The scientific substantiation of the main evolutionarily determined role of stress as an adaptation link indicates the possibility of acquiring some degree of resistance to stressful situations. Prevention of reducing the excess of stress reactions and reducing the possibility of its transformation into a link in the pathogenesis of diseases limits the complex of mechanisms designated as a stress-limiting system. Important information is the development and coordination of the stress response, which is provided by a complex set of mechanisms of neuroendocrine regulation, united by the concept of “stress-implementing system”. The most common forms of stress are fetal hypoxia, metabolic disturbances, and toxic effects leading to uncontrolled oxidative stress at the cellular and tissue levels with the development of pregnancy complications, intrauterine growth retardation syndrome (IUGR), persistent changes and pathological conditions. As the fetus grows, the flow of oxygen and nutrients from the mother through the placenta increases, which is accompanied by an increased risk of the formation of pathologies of the brain, heart, liver and kidneys with the development of a multi-organ pathology in the subsequent life. It has been proven that oxidative stress combined with stress of malnutrition in the prenatal period increases the risk of endocrinopathies, kidney diseases, and a number of other chronic diseases in the adult state. In practical terms, the negative effects of stress are of particular interest. Early detection of psychosocial and sympathomimetic factors causing stress is the basis for the prevention of childhood pathology.

The authors present their own results of scientific research on the clinical and paraclinical characteristics of various stages of chronic kidney disease in children. They determine pathogenetic markers for the diagnosis and prognosis of chronic kidney disease in childhood with the assessment of the set of endothelial dysfunction markers. The authors proved diagnostic and prognostic value of a stepwise increase in arterial hypertension, urinary excretion of prosclerotic, pro-inflammatory cytokines and growth factors with a simultaneous decrease in urinary excretion of anti-inflammatory cytokines, an increase in the level of microalbuminuria, disturbances of urodynamics and intrarenal hemodynamics.The authors developed an algorithm for the diagnosis of chronic kidney disease in childhood, taking into account pathogenetic factors with an assessment of the complex of clinical and paraclinical, structural, functional parameters, hemodynamic changes in the kidneys in combination with the parameters of endothelial function and cytokine status.