Ultrasound-Guided Margin Selection for Crohn's Disease

(SMILE-CD Trial)

This trial tests a new method to help surgeons determine where to cut during surgery for individuals with Crohn's disease in the last part of their small intestine. It compares an ultrasound technique, specifically IOUS-guided margin selection, with the usual method of using sight and touch to find the optimal cutting location. The goal is to determine if the ultrasound method improves outcomes after surgery. Individuals with Crohn's disease affecting their terminal ileum who are scheduled for surgery might be suitable candidates for this study. As an unphased trial, this study provides a unique opportunity to contribute to innovative surgical techniques that could enhance future patient care.

Research has shown that intraoperative ultrasound (IOUS) during surgery for Crohn's disease is under study for its safety and effectiveness. One study found that IOUS led to more precise surgical results, with fewer instances of leftover diseased tissue. Importantly, side effects did not significantly differ from those of traditional methods. This suggests that IOUS is a safe tool for Crohn’s disease surgery. The technique involves assessing the thickness and structure of the bowel wall to ensure accurate removal of affected areas, showing promise in improving surgical outcomes without adding extra risk to patients.¹²³⁴⁵

Researchers are excited about this trial because it explores a new technique, ultrasound-guided margin selection, for Crohn's disease surgeries. Unlike the standard method where surgeons rely on sight and touch to determine where to cut, this approach uses intraoperative ultrasound (IOUS) to pinpoint the best spot for resection. By focusing on criteria like the thickness of the bowel wall and its layer structure, this technique aims to reduce complications and improve healing. If successful, it could mean more precise surgeries and better outcomes for patients with Crohn's disease.

Research has shown that using intraoperative ultrasound (IOUS) during surgery can guide surgeons in Crohn's disease operations. In this trial, one group of participants will undergo IOUS-guided margin selection, labeled as "Margin B." Studies have shown that this method results in a much lower chance of leaving behind disease tissue compared to traditional surgery methods (18.5% vs. 48.1%). IOUS helps surgeons remove affected areas more accurately. Another group will have macroscopic margin selection, labeled as "Margin A," which represents the current standard of care. Ultrasound can also detect disease not visible to the naked eye. This technique has been shown to predict healing and remission in Crohn's disease, making it a promising tool for surgery.¹²⁵⁶⁷