Evaluation of Deep Remission with Through-The-Scope Catheter-Based Endoscopic Ultrasound during Double Balloon Enteroscopy in Small Bowel Crohn's Disease.

Background and Aims: Evaluation of deep remission in Crohn's disease (CD) can be challenging when the disease is confined to the small intestine. The aim of this study was to evaluate the effectiveness of through-the-scope (TTS) endoscopic ultrasound (EUS) during Double-balloon enteroscopy (DBE) in distinguishing small-bowel CD patients in endoscopic remission from those with active disease.
Methods: Patients who underwent DBE-EUS were divided into groups of endoscopic remission and endoscopic activity according to segmental Simple Endoscopic Score for Crohn's Disease (SES-CD). Thickness of small intestinal wall layers and other parameters were evaluated by EUS.
Results: EUS using the ultrasonic catheter probe via DBE showed that the total wall thickness (TWT) and submucosal thickness (SMT) of the small intestine in the active group were significantly greater than those in the remission group (TWT 3.84±1.02 vs 2.42±0.25mm, SMT 1.23±0.34 vs 0.79±0.13mm, respectively, p<0.001). Cut-off values of 2.65 mm for TWT and 0.95 mm for SMT can distinguish active small-bowel CD from inactive disease (Sensitivity 91.5%, Specificity 80.8% and Sensitivity 70.2%, Specificity 88.6%, respectively). The correlation analysis revealed a significant positive correlation between TWT and SES-CD (r=0.930, p<0.001). Furthermore, TWT was strongly correlated with FC (r=0.861, p<0.001) and CDAI (r=0.805, p<0.001). Similar results were observed for SMT.
Conclusions: EUS using an ultrasonic catheter probe during DBE is effective in evaluation of both mucosal and transmural healing in small-bowel CD patients. DBE-EUS could become an important tool in the management of patients with small-bowel CD.
(Copyright © 2024 American Society for Gastrointestinal Endoscopy. Published by Elsevier Inc. All rights reserved.)