Use of a constant rate infusion of insulin for the treatment of hyperglycemic, hypernatremic, hyperosmolar syndrome in an alpaca cria.

Case Description-A 3-day-old 9.5-kg (21-lb) female alpaca cria was examined because of lethargy and anorexia. Clinical Findings-Physical examination revealed hyperthermia, muscle fasciculations, and tremors of the head. Seizures were also observed, which indicated CNS dysfunction. Hyperosmolar syndrome (HOS) was diagnosed on the basis of hyperglycemia, hypernatremia, azotemia, high plasma osmolarity, and metabolic acidosis. Treatment and Outcome-A constant rate infusion of regular insulin was administered with hypo-osmolar fluids to treat HOS, and blood glucose and sodium concentrations were successfully lowered. Neurologic deficits resolved with treatment, and the cria was discharged 11 days after admission. Clinical Relevance-Administration of insulin as a bolus in addition to hypo-osmolar fluids has been advocated in the management of neonatal camelids with HOS. Administration of regular insulin via a constant rate IV infusion was used to successfully manage a neonatal camelid with HOS. This form of insulin administration may allow more control of glucose kinetics in these patients. (J Am Vet Med Assoc 2010;236:562-566)