Significance of Intra-abdominal Free Fluid Detected in Ultrasonography in the Clinical Assessment and Outcomes of Adult Patients Presenting to the Emergency Department Due to Abdominal Pain.

Objective The aim of the study was to evaluate the diagnostic process and clinical course in adult patients who presented to the emergency department (ED) with acute abdominal pain (AAP) and were found to have intra-abdominal free fluid (FF) on ultrasonography (USG). Methods This prospective observational study was conducted in a training and research hospital adult emergency department between March 15, 2013, and April 15, 2013. The study included 252 patients aged above 18 years, who were admitted to the emergency room complaining of non-traumatic acute abdominal pain and provided consent for the study. Results The most common diagnoses were acute, nonspecific abdominal pain (37.3%), acute appendicitis (19%), and urinary tract pathology (15.9%). Intra-abdominal free fluid was detected with ultrasonography in 42.5% of patients. Patients with intra-abdominal free fluid were younger than the other patients. The emergency department length of stay was longer in patients with intra-abdominal free fluid (p=0.011). Of the 252 patients enrolled in the study, 32.9% were admitted to the hospital, 21.4% of whom underwent surgery and 11.5% received medical therapy. Most of the patients (64.5%) who were discharged home had no intra-abdominal free fluid in the ultrasonography (p<0.001). Conclusion The presence of intra-abdominal free fluid alone did not guide the clinical decision regarding the diagnostic evaluation of adult patients that presented to the emergency department complaining of non-traumatic acute abdominal pain.