<prompt> A 35 years old man presenting with acute pancreatitis. Ideal fluid of choice:Isotonic crystalloidHypertonic crystalloidHypotonic crystalloidVasopressin  <response>: Ans. a. Isotonic crystalloidRef: Harrisons Principle of Internal Medicine 19th Ed; Page No-2096Aggressive intravenous fluid resuscitation; is the most important treatment intervention for acute pancreatitis.For rest the pancreas; the patient is made NPO and to control abdominal pain narcotic analgesics given intravenously and supplemental oxygen 2L via nasal cannula.To maintain urine output0.5cckgper hour; Intravenous fluids of lactated Ringers or normal saline are initially bloused at 15-20cckg1050-1400ml, followed by 3 mgkg per hour 200-25mLh.Serial bedside evaluations are required every 6-8 h to asses vital signs, oxygen saturation, and change in physical examination.Lactated Ringers solution may be a better crystalloid than normal saline because it decreases systemic inflammation. 