A 65-year-old woman is hospitalized for acute pancreatitis due to alcohol use. During hospitalization, she receives lactated Ringer solution overnight and is taking nothing by mouth.
On physical examination the morning after admission, the patient reports improved pain. Vital signs are normal. She has mild epigastric pain without guarding. Bowel sounds are present.
After fluid resuscitation, hematocrit decreases from 45% at admission to 38% 12 hours later.
Which of the following is the most appropriate management?
