The subjects randomized to the Lactated Ringer's arm will receive 30ml/kg Lactated Ringer's solution run wide open. Those randomized to the Placebo group will receive 30ml/kg of normal saline wide open. The precise fluid bolus quantity will be determined using a measure of the patient's weight in kilograms multiplied by 30, rounding the final figure to the nearest 100ml for simplicity. (E.g. 2077 ml would be rounded to 2100ml.) The pharmacist for the study will randomly assign each subject to a treatment group ensuring that there are an equal number of subjects in the Lactated Ringer's arm and in the Placebo arm. The pharmacist will obscure the fluid bag contents from the investigators to maintain the blinding. Only the pharmacist will know which treatment each subject received. The person administering the medications and those doing the analysis of the data will only know the study number of each patient, and will be blind to the pharmacist's randomization.