MSRA-0782

A 62-year-old woman comes to the Emergency Department with acute abdominal pain. She is experiencing severe pain in the epigastric region that radiates to her back and is vomiting excessively. When questioned, she confesses to having had too many drinks at a bachelorette party the night before. Her serum amylase level is 1190 u/l. What is the most suitable initial management step?