Can Surgical Registrars Accurately Identify the Urgent from the Non-Urgent Patient Presenting with Acute Abdominal Pain?

BACKGROUND: Acute abdominal pain is a common surgical presentation with a wide range of causes. Differentiating urgent patients from non-urgent patients is important to optimise patient outcomes and the use of hospital resources. The aim of this study was to determine how accurately urgent and non-urgent patients presenting with abdominal pain can be identified.

METHODS: A prospective study of consecutive patients admitted with abdominal pain was undertaken. Urgent patients were classified as requiring treatment (theatre, intensive care unit, endoscopy, or radiologic drainage) within 24 h. Differentiation between urgent and non-urgent was made on the basis of the initial assessment prior to the use of advanced imaging. Outcomes were compared to a final classification based on final diagnosis as adjudicated by an expert panel.

RESULTS: Of the 301 patients included, 93 (30.9%) were deemed urgent based on initial assessment, compared to 83 (27.6%) on final diagnosis. Overall sensitivity for recognising urgent patients was 74.7% and specificity 89.9%, and overall accuracy was higher for senior registrars compared to junior registrars (p = 0.015). Urgent patients more often looked unwell or had peritonism on examination (39.8 vs. 17.4% and 56.6 vs. 14.7%, respectively, p < 0.001 for both).

CONCLUSIONS: Registrars can accurately differentiate urgent from non-urgent patients with acute abdominal pain in the majority of cases. Accuracy was higher amongst senior registrars. The "end-of-the-bed-o-gram" and clinical examination are the most important features used for making this differentiation. This demonstrates that there is no substitute for exposure to acute presentations to improve a trainee's diagnostic skill.