Transabdominal ultrasonography of the small bowel after oral administration of a non-absorbable anechoic solution: Comparison with barium enteroclysis

AIM: The aim of this study was to determine if oral administration of a non -absorbable anechoic solution conveys any benefit during abdominal ultrasou nd (US), with special reference to its accuracy. MATERIALS AND METHODS: Fifty-three adult out-patients scheduled for small b owel barium enema (SBE) were included. The day before SEE all patients unde rwent abdominal US before and after oral administration of an isotonic non- absorbable electrolyte solution containing polyethylene glycol (PEG-ELS). S ensitivity and specificity were evaluated using SEE as a gold standard. RESULTS: After ingestion of PEG-ELS satisfactory distension of the intestin al lumen was obtained (11-25 mm) with sequential visualization of jejunoile al loops in 30.9 +/- 17.3 min. In 15 out of 53 cases both US and SEE showed bowel changes characteristic of Crohn's disease. In three out of 53 cases both US and SEE showed neoplasms. In one out of 53 cases US was negative, S EE positive for local nodularity and ulcerations typical of Crohn's disease . In one out of 53 cases US was negative, SEE positive for macronodularity consistent with coeliac disease. In five out of 53 cases US was negative, w hile SEE was positive for mininodularity expressive of lymphoid hyperplasia . In 28 out of 53 cases both examinations were negative. CONCLUSION: PEG-ELS administration allows a thorough US investigation of th e small bowel, with fair sensitivity (72%) and excellent specificity (100%) . False negative findings are mainly due to lymphoid hyperplasia, a feature of uncertain significance in adults. (C) 2001 The Royal College of Radiolo gists.