4.7 Article

Novel porcine model of Crohn's disease anastomotic stricture suitable for evaluation and training of advanced endoscopic techniques

Journal

GASTROINTESTINAL ENDOSCOPY
Volume 93, Issue 1, Pages 250-256

Publisher

MOSBY-ELSEVIER
DOI: 10.1016/j.gie.2020.05.063

Keywords

-

Funding

  1. Czech Health Research Council (Czech Republic (Czechia), New minimally invasive techniques for treatment of postoperative Crohn's disease recurrence on experimental model) [NV19-08-00449]
  2. National Sustainability Program I, Czech Ministry of Education, Youth and Sports [LO1609]
  3. Ministry of Defense, Czech Republic [MO1012]
  4. IBD-Comfort Foundation
  5. [RVO: 67985904]

Ask authors/readers for more resources

The study created a large animal model of anastomotic stricture with Crohn's disease properties, allowing for the development of new techniques and endoscopic interventions. The model demonstrated histologically verified changes similar to CD and maintained stable diameter for over 6 months, confirming the feasibility of endoscopic therapeutic interventions.
Background and Aims: Currently, treatment options in postsurgical recurrence of stricturing Crohn's disease (CD) are limited. However, development of new invasive endoscopic techniques in clinical practice has safety constraints. The aim of this study was to create a large animal model of anastomotic stricture with CD properties to enable development of new techniques and training. Methods: A side-to-side ileocolonic anastomosis was created in a modified Roux-en-Y manner with bowel continuity preserved. Two weeks after surgery, we began endoscopic submucosal injections of phenol/trinitrobenzenesulfonic acid solution. This solution was injected every 2 weeks in each quadrant of the anastomosis until development of a stricture. The anastomosis site was assessed endoscopically 2 weeks after the last application (baseline) and then every 2 months until month 6. Endoscopically nonpassable strictures were treated with balloon dilation, endoscopic stricturotomy, and stent placement to confirm the feasibility of such interventions. Results: Nineteen minipigs were included with no postoperative adverse events. After a mean of 4.4 +/-.7 injection sessions with 10.5 +/- 3.0 mL of the solution, anastomotic strictures were created in 16 pigs (84.2%). Mean diameter of the strictures at baseline was 11.6 +/- 2.2 mm. The strictures were inflamed, and the endoscope could not pass. Follow-up was successfully completed in 15 animals (79.0%) with the mean deviation from the initial diameter in every measurement of -.02 +/- 2.26 mm (P = .963) and a mean final diameter of 11.7 +/- 3.4 mm. The histopathologic evaluation revealed the presence of submucosal fibrosis, chronic inflammation, and microgranulomas. All strictures were amenable to endoscopic therapeutic interventions. Conclusions: We developed a novel, reproducible porcinemodel of anastomotic stricture with histologically verified changes mimicking CD and stable diameter for more than 6 months. It is suitable for further endoscopic interventions.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available