Abstract
Lactate levels are critical indicators of severe, life-threatening conditions and are widely used as prognostic markers in veterinary emergency care. Blood gas analyzers and portable lactate meters are common tools, but discrepancies between devices, especially at high lactate levels, have been reported. This study aimed to evaluate inter-device variability in canine lactate measurement. Lactate levels in 118 dogs were measured using a blood gas analyzer and a portable lactate meter. A strong correlation (R=0.906) was observed; however, the portable meter exhibited an 18% positive bias primarily characterized by additive error. These findings emphasize the need for careful device selection and the standardization of lactate measurement methods.