[Sodium, potassium and chloride levels in the kidney tissue of piglets in the postnatal period].

In this paper the level of Na, K and Cl was determined on 108 kidney slices obtained from 12 kidney, removed from 6 clinical healthy piglets. The animals were 4 weeks old. The kidney tissue prepared by method as described by Appelboom et al. (1958). The electrolyte concentration in the cortex, outer medulla and inner medulla was calculated per 1 kg wet and dry tissue. There is a distinct (significant differences) electrolyte gradient in the piglet kidney tissue (the maximum electrolyte concentration in the papilla area). Low Na content even in inner medulla, indicates little capacity for urine concentration in the 4 week old piglets. Individual differences of the electrolyte content in kidney tissue, may indicate different rate of functional development of piglets kidney. No significant difference between left and right kidney was stated in the electrolytes concentration.