PLETH VARIABILITY INDEX-GUIDED FLUID THERAPY LOWERS POST-OPERATIVE LACTATE LEVELS IN DOGS UNDERGOING ELECTIVE ABDOMINAL SURGERY: A RANDOMIZED CONTROLLED TRIAL

To evaluate the hemodynamic optimization effect of pleth variability index (PVI)-guided fluid therapy during abdominal surgery on tissue perfusion, 19 client-owned dogs that underwent elective abdominal surgery were randomized into control (n=10) and PVI (n=9) groups. In the control group, perioperative fluid management was based on the 2013 AAHA/AAFP Fluid Therapy Guidelines for Dogs and Cats. In the PVI group, the fluid rate was maintained based on basic daily requirements. If PVI was higher than 15% for >5min, 3–5mL/kg of crystalloid fluid bolus was infused. The tissue perfusion indicator, lactate levels, was measured at the time of intubation, extubation, and 6, 12 and 24h postoperatively. There were no significant differences in total and average fluid infused between control and PVI groups. The control group had significantly higher lactate levels than that of the PVI group at 12h postoperatively (2.2±1.0mmol/L versus 1.1±0.6mmol/L, p=0.008) and overall postoperatively (1.8±0.8mmol/L versus 1.2±0.5m...