system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 66-year-old woman comes to the emergency department because of a 1-day history of severe abdominal pain, nausea, and vomiting. She has also had profuse watery diarrhea with streaks of blood for the past 5 days. She had a urinary tract infection 3 weeks ago and was treated with a 14-day course of ciprofloxacin. She appears in severe distress. Her temperature is 39.3°C (102.7°F), pulse is 110/min, and blood pressure is 100/60 mm Hg. Examination shows a distended abdomen, tenderness in the lower quadrants, and hypoactive bowel sounds; rebound tenderness and abdominal rigidity are absent. Cardiopulmonary examination shows no abnormalities. Test of the stool for occult blood is positive. Laboratory studies show:
Hemoglobin 10.2 g/dL
Leukocyte count 28,000/mm3
Serum
Na+ 133 mEq/L
K+ 3.3 mEq/L
Cl- 97 mEq/L
Glucose 98 mg/dL
Creatinine 1.3 mg/dL
Two wide bore needles are inserted and intravenous fluids are administered. An abdominal x-ray of the patient would be most likely to show which of the following?"
assistant
Dilation of the colon with loss of haustration