No abstract

Variations in the basic parameters of the electrical activity of the small intestine in rats were studied using an experimental model of hypochlorhydria caused by an intragastric administration of rabeprazole for 16 days. Hypochlorhydria was found to lead to an increased duration of irregular electric activity and a reduction in the period of quiescence, which indicates an increase in uncoordinated contractions of the small intestine. A decrease in the number of migrating myoelectric complexes and, consequently, a partial suppression of propulsive peristalsis contributes to an excessive bacterial overgrowth in the proximal small intestine.

Following a single administration of sodium thiopental in high doses (85 mg/kg intraperitoneally), the animals demonstrated the absence or weakening of reflexes at the levels of the spinal cord, medulla oblongata, bridge and midbrain and cerebral cortex over the period of one day. Other signs included a pronounced hypothermia, a decrease in the respiratory rate and a violation of its rhythm, a distinct tendency to bradycardia. On days 1-3 after the administration of sodium thiopental, a restoration of the respiratory rate, heart rate, body temperature, and the functional state of the central nervous system at various levels was observed, with the exception of the cerebral cortex. In the long term, following the administration of sodium thiopental for up to 21 days, a depression of the functional state of the central nervous system at the level of the cerebral cortex, violation of coordinated propulsive peristalsis of the small intestine and intestinal microbiocenosis were detected. Hence, in experimentally simulated barbiturate poisoning, not only is the suppression of the functions of the central nervous system observed, but also significant and prolonged restructuring of the functional state of the gastrointestinal tract.