[Relation between the concentration of sodium and potassium in the erythrocytes of dairy cows and the concentration of these elements in the plasma and urine and the level of blood glucose].
Blood and urine samples of 180 dairy cows from 12 herds were examined. Sodium and potassium concentrations were determined in erythrocytes, whole blood, plasma, urine, and glucose concentration in blood: the interrelations were compared. Sodium and potassium concentrations in erythrocytes were 85.15 +/- 11.45 mmol/l, and 25.93 +/- 7.81 mmol/l, respectively. A statistically significant relation was found between sodium and potassium concentrations in erythrocytes (r = 0.3467+++) and the content of electrolyte in blood cells and in whole blood (Na: r = 0.5336+++; K: r = 0.3561+++). No statistically significant relation of intraerythrocyte concentration of both electrolytes was confirmed with respect to the other characteristics (sodium and potassium concentrations in plasma and urine, and glucose concentration in blood). In the conditions of routine laboratory diagnostics in clinically healthy cows, determinations of intraerythrocyte sodium and potassium do not broaden possibilities of evaluating the metabolic state of these electrolytes and cannot be used as the characteristics of energy insufficiency.  The cannot replace the analyses performed in serum and urine.
D000818:Animals; D001786:Blood Glucose / Q000032:analysis*; D002417:Cattle / Q000097:blood*; D003612:Dairying; D004912:Erythrocytes / Q000032:analysis*; D005260:Female; D010949:Plasma / Q000032:analysis; D011188:Potassium / Q000097:blood* / Q000652:urine; D012964:Sodium / Q000097:blood* / Q000652:urine
D001786:Blood Glucose; D012964:Sodium; D011188:Potassium
Vztah koncentrácie sodíka a draslíka v erytrocytoch dojníc ku koncentrácii týchto prvkov v plazme a moci a glukózy v krvi.