Abdominal Pain NOS (not otherwise specified) – Unknown Cause

This is defined as ‘pain for which no immediate cause can be found (during the acute admission) and specifically does not require surgical intervention’. NSAP may be self-limiting and accounts for 13–40% of all surgical admissions. The abdomen can be subdivided into regions (picture on the left) or into quadrants (picture on the right) to help standardize the description of the location of the pain between providers. The location of the pain will help drive the clinician’s differential diagnosis and therefore the tests needed. The most frequent cause of abdominal pain is gastroenteritis (13%), irritable bowel syndrome (8%), urinary tract problems (5%), inflammation of the stomach (5%) and constipation (5%).

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