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P312 Introduction of bowel ultrasonography for follow-up of paediatric inflammatory bowel disease: A single-centre experience

R. Lev Zion, G. Focht, N. Asayag, D. Turner

Shaare Zedek Medical Center, Department of Pediatric Gastroenterology, Jerusalem, Israel

Background

Bowel ultrasonography (BUS) for imaging of inflammatory bowel disease (IBD) is increasingly recognised as a prominent non-invasive tool to supplement, and in some cases replace traditional endoscopic and imaging modalities, with high sensitivity and specificity. The increasing number of gastroenterologists trained to perform BUS has transformed BUS into a bedside tool to guide routine clinical decision making and accurately monitor response to treatment. However, this process is still in its infancy in paediatric IBD. We present here data on the first 2 years of implementation of BUS performed by a paediatric gastroenterologist (RLT) at the paediatric IBD centre at Shaare Zedek Medical Center in Jerusalem. We aim to describe trends, results and clinical implications of the US studies performed during this period.

Methods

The electronic medical record system was searched for all BUS studies performed on IBD patients by RLT as part of his weekly IBD clinic between 2017–2019. Studies performed on other caregivers’ patients were excluded to ensure uniform documentation and nomenclature. Findings were classified as normal (wall thickness <3 mm), mild (wall thickening 3–4 mm and blood flow < Limberg 3) or significant signs of inflammation (wall thickness ≥4 mm or 3–4 mm with Limberg ≥3). Charts were reviewed to assess the impact of BUS findings on clinical management.

Results

A total of 83 bedside BUS studies were performed on 55 IBD patients (42 with Crohn’s – CD) during the study period, with a mean age of 15.1 ± 3.7 years. Thirty-four had one study (23 with CD), 15 had two (13 with CD) and 6 had three or more (all with CD). Overall, 32 studies were normal, 20 showed mild findings and 30 showed significant inflammation. Four studies found stenosis and one showed an abscess. Follow-up studies of initially active disease showed 10/16 (63%) with improvement, including 9/16 (56%) with sonographic remission. 22/83 (27%) studies were felt upon review to have had a direct impact on clinical decision-making. These included decisions not to switch therapy due to normal BUS despite symptoms, admission due to discovery of an abscess, decision to escalate therapy due to lack of sonographic improvement, and decision to continue adalimumab in the presence of a stricture due to favourable prognostic characteristics as per the CREOLE study.

Conclusion

Bedside BUS is a practical and useful tool that can be integrated into a paediatric IBD clinic, with the ability to provide relevant information in real-time and thus impact on day-to-day patient management.