Iatrogenic alkalosis in goats with the use of intravenous electrolyte solution containing 84 mEq/L of lactate

Alcalose iatrogênica em cabras após infusão intravenosa de solução eletrolítica contendo 84mEq/L de lactato

ABSTRACT:

This study investigated the alkalinizing potential of an intravenous polyionic solution containing 84 mEq/L of lactate on hydroelectrolyte and acid-base balances in healthy goats.Four solutions, containing 28 and 84 mEq/L of lactate (L28 and L84) or bicarbonate (B28 and B84), were formulated. Six healthy Saanen goats were used. All four solutions were infused intravenously in each animal, one at a time, with an interval of 4-5 days between the infusions, at a speed of 33.3 mL/kg/h and totaling a volume equivalent to 10% of their body weight, in 3 h of continuous administration. Samples of venous blood and urine were collected at 0h (start of the infusion), 1.5h (middle of the infusion), 3h (end of the infusion), and 4.5h, 6h, and 24 h from the start of the infusion. The laboratory tests includeddetermination of blood pH, pCO₂,HCO₃ ^-, base excess (BE), Na⁺, K⁺, Cl^-, total plasmatic protein, L-lactate, and creatinine. In urine samples, pH, Na⁺, K⁺, Cl^-, L-lactate, and creatinine were measured. The L28 solution, equivalent to lactated Ringer’s solution, caused a slight increase in the alkaline reserve and did not change the electrolyte balance. The L84 solution resulted in a greater increase in the alkaline reserve, equivalent to the B84 solution, with return to baseline values within 24 h from the start of the infusion.The L84 solution proved to be safe and produced iatrogenic alkalization when infused into healthy goats, without causing side effects.

Key words:
caprine; acid-base balance; fluid therapy; metabolic acidosis