The lactate will then be measured five minutes after the conclusion of the intravenous fluid treatment. 5ml of blood will be wasted to clear the line prior to this blood draw. Lactate will be measured with a point-of-care meter (the iSTAT-1 analyzer). The before-treatment and after-treatment lactate levels will be compared to see if the Lactated Ringer's caused a significant rise (>0.3 mmol/L) in the lactate level at any point during the data collection period.