Pre-stenotic Inflammation Following Endoscopic Balloon Dilatation in Crohn's Disease: A Prospective Study
试验速览
- 阶段
- 不适用
- 状态
- 招募中
- 入组人数
- 24
- 试验地点
- 1
- 主要终点
- Endoscopic response
研究概览
简要总结
As a consequence of chronic relapsing inflammation in Crohn's disease (CD), progressive bowel damage and scarring occurs in affected regions of intestine. This damage often leads to narrowing, or stricturing of the bowel lumen, and even complete bowel obstruction. Stricturing CD is thought to be a major contributor to penetrating complications including abscesses and fistulae.
Depending on the severity and clinical significance of fixed strictures, treatment options include either endoscopic balloon dilatation (EBD), or surgery with either resection or stricturoplasty recommended on a case-by-case basis.
EBD has been shown to be a safe alternative to surgery in management of CD strictures.
While the short- and medium-term clinical outcomes of EBD have been well described, less well studied is the impact of relieving Crohn's strictures on the inflammatory load proximal to the stricture. The restricted flow of fecal contents through a stricture creates a region of relative stasis in the bowel loops immediately proximal to the stricture, appreciated at times by pre-stenotic dilatation on cross-sectional imaging. This stasis fosters localized bacterial overgrowth and worsening dysbiosis in these bowel loops.
The investigators hypothesize that improvement of fecal flow by way of successful balloon dilatation of a CD stricture, could independently reduce the inflammatory burden, not only in the stenotic segment but also in the proximal loop of bowel.
详细描述
This prospective, observational study will include both pediatric and adult patients with stricturing CD on stable therapy who are planned to undergo EBD for management of a Crohn's stricture.
Included patients are those in whom the treating physician is planning a colonoscopic EBD for a CD stricture. Patients will be followed with imaging, clinical assessment, serologic testing, stool microbiome and endoscopic assessment at time of EBD, and post-EBD. EBD will be performed to a target dilatation size of 18-20mm. If the stricture is deemed too narrow to allow dilatation to target size in a single session, graduated dilatations at a number of sessions can be undertaken at the treating clinician discretion. Time-point of week 0 will be defined as achievement of dilatation target size.
Clinical assessment, blood and stool for calprotectin and microbiome, and focused bowel US to be performed within a 4 week period prior to EBD. Previous imaging (US/MRE/CTE) from 2-4 months prior to EBD, where performed, will also be assessed.
In the absence of any contra-indication, repeat colonoscopy will be performed at week 12 (±2 weeks) to assess stricture size and assess extent of mucosal inflammation at the stricture site and the pre-stenotic region. Follow-up clinical review with repeat blood tests, stool for calprotectin and microbiome and focused bowel US will also be performed at week 12 (±2 weeks).
Endoscopic images from pre-stenotic bowel loop and bowel US from week 0 and week 12 will be centrally read by two central readers blinded to the patient and stage. An average of pre-stenotic region SES-CD score and US-derived outcome measures from both readers will be recorded. Where available, imaging from 2-4 months pre-EBD, either US, MRE or CTE, will be assessed by the same central readers.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- 未提供
结局指标
主要结局
Endoscopic response
时间窗: 12 weeks compared to week 0
Decrease in SES-CD in the pre-stenotic region of ≥ 3 at 12 weeks compared to week 0
次要结局
- No treatment escalation(week 12)
- Endoscopic healing(week 12)
- Wall thickness(week 12 compared to week 0)
- Limberg score US(week 12 compared to week 0)
- Stool calprotectin(week 12 compared to week 0)
- Comparison of imaging and calprotectin(week 12)
- Luminal diameter(week 12 compared to week 0)
- Inflammed length(week 12 compared to week 0)
- Obstructive score reduction(week 12)
- Clinical remission(week 12)
研究者
Oren Ledder, MD
Principal Investigator
Shaare Zedek Medical Center