Objective: Computed tomography (CT) imaging is frequently obtained for recurrent abdominal pain after a prior emergency department (ED) evaluation. We evaluate the utility of repeat CT imaging following an indeterminate index CT in low-risk abdominal pain adult ED patients.Methods: An electronic search was designed for the patient-intervention-controloutcome-timing (PICOT) question: (P) adult patients with low-risk, recurrent, and previously undifferentiated atraumatic abdominal pain presenting to the ED after an index-negative CT within 12 months; (I) repeat CT versus (C) no repeat CT; for (O) abdominal surgery or other invasive procedure, mortality, identification of potentially life-threatening diagnosis, and hospital and intensive care unit admission rates; and return ED visit (T), all within 30 days. Four reviewers independently selected evidence for inclusion and then synthesized the results around the most prevalent themes of repeat CT timing, diagnostic yield, ionizing radiation exposure, and predictors of repetitive imaging.Results: Although 637 articles and abstracts were identified, no direct evidence was found. Thirteen documents were synthesized as indirect evidence. None of the indirect evidence defined a low-risk subset of abdominal pain nor did investigators describe whether reimaging occurred for complaints similar to the initial ED evaluation.Included studies did not describe the index CT findings and some reported explanatory findings noted on the original CT for which repeat CTs might have been indicated.The time frame for a repeat CT ranged from hours to 1 year. The frequency of repeat CTs (2%-47%) varied across studies as did the yield of imaging to alter downstream clinical decision making (range = 5%-67%).
Conclusion:Due to the absence of direct evidence our scoping review is unable to provide high-quality evidence-based recommendations upon which to confidently
INTRODUC TI ONNontraumatic abdominal pain is the most common principal reason to visit an emergency department (ED) in the United States, representing 8.5% of visits based on data from the National Hospital Ambulatory Medical Care Survey (2018). 1 The frequency of repeat ED visits for "low-risk" and "undifferentiated" abdominal pain is unknown, but repeated visits for abdominal pain are common. In 2014, abdominal pain accounted for 15%-34% of all ED superutilizer visits, defined as patients with annual ED visits exceeding two standard deviations above the mean stratified by payer and age group. Among superutilizers, abdominal pain was the most common diagnosis in all age groups and payer types, with the sole exception of Medicareinsured patients aged 65 years and greater, in which it was the third most common diagnosis (Table 1). 2Computed tomography (CT) imaging for abdominal pain in the ED increased significantly over the past three decades. 3-5 CT often facilitates timely surgical diagnoses, excludes intraabdominal pathology, increases clinician and patient confidence in diagnosis, and can facilitate discharge rather than admiss...