The alkalinizing effects of metabolizable bases in the healthy calf.
The alkalinizing effect of citrate, acetate, propionate, gluconate, L and DL-lactate were compared in healthy neonatal calves. The calves were infused for a 3.5 hour period with 150 mmol/L solutions of the sodium salts of the various bases. Blood pH, base excess, and metabolite concentrations were measured and the responses compared with sodium bicarbonate and sodium chloride infusion. D-gluconate and D-lactate had poor alkalinizing abilities and accumulated in blood during infusion suggesting that they are poorly metabolized by the calf. Acetate, L-lactate and propionate had alkalinizing effects similar to bicarbonate, although those of acetate had a slightly better alkalinizing effect than L-lactate. Acetate was more effectively metabolized because blood acetate concentrations were lower than L-lactate concentrations. There was a tendency for a small improvement in metabolism of acetate and lactate with age. Sodium citrate infusion produced signs of hypocalcemia, presumably because it removed ionized calcium from the circulation. D-gluconate, D-lactate and citrate are unsuitable for use as alkalinizing agents in intravenous fluids. Propionate, acetate and L-lactate are all good alkalinizing agents in healthy calves but will not be as effective in situations where tissue metabolism is impaired.
D000085:Acetates / Q000378:metabolism; D000136:Acid-Base Equilibrium; D000704:Analysis of Variance; D000818:Animals; D000831:Animals, Newborn / Q000378:metabolism*; D001639:Bicarbonates / Q000378:metabolism; D002417:Cattle / Q000378:metabolism*; D002951:Citrates / Q000378:metabolism; D005942:Gluconates; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000378:metabolism; D008297:Male; D011422:Propionates / Q000378:metabolism; D012044:Regression Analysis; D012964:Sodium / Q000378:metabolism; D017693:Sodium Bicarbonate; D012965:Sodium Chloride / Q000378:metabolism
D000085:Acetates; D001639:Bicarbonates; D002951:Citrates; D005942:Gluconates; D007773:Lactates; D011422:Propionates; D012965:Sodium Chloride; D017693:Sodium Bicarbonate; D012964:Sodium