Indications for plain abdominal radiography in the emergency department.

Despite the proliferation of new imaging methods, plain abdominal radiographs remain the first films ordered in a significant number of emergency department patients. Several small studies suggest that abdominal films are ordered unnecessarily. Over-ordering takes two forms: inappropriate indications and poor choice of the number and/or types of views ordered. Criteria for obtaining plain abdominal radiographs are suggested based on the likelihood of radiographic findings and the probability of a change in management resulting from the findings. Benefit versus risk in fertile women is considered. Recommendations are made for the selection of views based on clinical suspicion and initial film review. There is a need for studies using larger sample sizes to confirm these conclusions.