<p num="24">FIELD: medicine.</p> <p num="25">SUBSTANCE: invention refers to medicine and aims at optimizing the nutritional status of children with aganglionosis of colon – Hirschsprung disease. Nutritional status is evaluated, and if nutritional deficiency is present, the pre-operative dietary ration is corrected with the Nutrilac fermented milk premium mixture or Nutrilac plus mixture depending on the child’s age. In the postoperative period the alimentation includes a mixture of Nutralac de-lactose plus or Nutriene standard mixture; de-lactose strained dishes of standard diet No. 5p and parenteral nutrition.</p> <p num="26">EFFECT: method enables reducing number of postoperative complications.</p> <p num="27">1 cl, 1 ex, 1 tbl</p>