OXIGEN REGIME AND FUNCTIONAL ACTIVITY OF BODY TISSUES DURING BRAIN AND KIDNEY DISORDER IN THE COURSE OF HYPEROXIA
Abstract and keywords
Abstract (English):
The paper contains information about the mechanisms of therapeutic action of hyperbaric oxy-genation on oxygen regime and state functions of brain cortex and stem during acute cerebral ischemia of 90 minutes length and on renal cortex during acute serum glomeralonephritis. Experimental acute cerebral ischemia is simulated by deligation of both common carotid arteries which leads to subcompensated and decompensated forms of ischemia. Experimental acute serum glomeralonephritis is simulated by a single intravenous injection of bovine serum albumin. A single session of hyperbaric oxygenation is carried out within 60 minutes (3 absolute atmospheres mode) at the first day of the pathological process formation. The following factors are analyzed: motion activity, electrical activity of brain and heart, volume rate of cerebral blood flow, blood pH, oxygen tension in the arterial and venous blood, arteriovenous oxygen and oxyhemoglobin difference, oxygen consumption by brain tissue in the end of 90 minutes of cerebral ischemia in conditions of hyperoxia. Volumetric blood flow rate, oxygen tension in renal cortex are measured; condition of renal ultrafiltration in early and late post hyperoxia periods during acute serum glomeralonephritis is defined. This paper shows a positive effect which hyperoxia has on the functional and metabolic processes at tissue and cellular level in the brain suffered from ischemia and kidneys during acute serum glomeralonephritis. Hyperbaric oxygenation restores blood flow and oxygen regime in the brain cortex and stem and renal cortex, normalizes metabolic processes in the brain cells and restore renal function.

Keywords:
hyperoxia, hyperbaric oxygenation, blood flow, oxygen, glomeralonephritis, cerebral ischemia, adaptation
Text

Эволюционные программы адаптации охватывают все уровни саморегуляции высших организмов. В эволюционном периоде биосферы с пониженным давлением кислорода сформировалась генетическая программа адаптации к гипоксии, а с повышением напряжения кислорода - программа адаптационных реакций на гипероксию. Живые организмы сформировали стереотипные реакции адаптации - биоэнергетики, деток-сикации и биосинтеза на недостаток или избыток кислорода. При резко выраженной кислородной недостаточности приспособительные реакции организма могут оказаться недостаточными. Возникающий дефицит кислорода в тканях головного мозга, приводит к нарушению жизнедеятельности нервных клеток и клеток других органов и развитию ряда серьезных заболеваний [1, 8]. Распространенность заболеваний, сопровождающихся ишемией головного мозга, почек велика: от незначительных нарушений функций до терминальных состояний, вызванных экстремальными факторами [2].

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