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• the patient with acute abdominal pain in the ED
• central / periumbilical abdominal pain in the ED
• ADD - an aortic dissection risk assessment tool
• colitis
• Crohn's disease
• general surgery
• lower GIT bleeding
• serum lactate and lactic acidosis
• large bowel obstruction
• perforated viscus
• peritonitis
• small bowel obstruction
• tenesmus
• ulcerative colitis