Effects of Intravenous Infusion of Hypotonic Hartman's Solution, with Volumes of Essential Water Loses, on Plasma Volume and Acid-base Equilibrium in Nondehydrated Heifers

Abstract

The effects of intravenous infusion of hypotonic Hartman's replacement fluids (HG) on plasma volume and acid-base equilibrium were examined. Tests were made twice on 4 heifers. The animals were infused with either 30ml/kg or 60ml/kg of HG at a flow rate of 20ml/kg/hr and were allowed at least 20 days to recover between infusions. After fluid replacement, they were monitored for 270 minutes. At the end of fluid replacement, relative plasma volume (rPV) increased to 122.3±4.1%(t=90) in the animals receiving 30 ml/kg and 129.5±4.7%(t=180) in animals receiving 60ml/kg. No significant difference in rPV was observed between the 2 groups. No significant changes were observed in acid-base equilibrium and serum osmotic pressure in heifers receiving intravenous HG infusions of 30 ml/kg or 60ml/kg. These findings indicate that hypotonicsolution infusions of 30ml/kg or 60ml/kg at a flow rate of 20ml/kg/hr can be administered to cattle.effectively and safely.