The aim of the research is to improve the diagnosis of disturbances of cell energy in children with chronic nonspecific pulmonary diseases (CNPD) in the remission stage by the methods of detection of cytochemical changes of the energy status and recording the percentage of immune-competent cells of blood with the low membrane potential of mitochondria (MPM). 77 children were examined, including 66 (83%) with lung malformations, and 11 children (17%) with chronic nonspecific lung diseases as an outcome of acute/chronic lung diseases. The presence of energy deficient states was assessed by the level of activity of oxidative-reduction enzymes of succinate dehydrogenase, alpha-glycerophosphate dehydrogenase, lactic dehydrogenase in lymphocytes of the peripheral blood and percent ratio of lymphocytes with low MPM. It was found out that in 53.2% of the examined children even in the remission stage there were identified the signs of mitochondrial insufficiency when the parameters of metabolic activity of enzymes in lymphocytes were significantly lower than the norm. The cluster analysis of the obtained data allowed identifying the parameters typical for energy deficient states of the organism of the child that demand the correction by energotropic medications.

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