What is the evidence that high‑pressure balloon dilation reduces recurrence compared with low‑pressure dilation in anal stenosis

What is known

- Larger balloon sizes (25 mm) are associated with higher perforation and bleeding rates and do not correlate with better long-term success. ¹ - Balloon dilation of anastomotic strictures shows early restenosis and complications including perforation and bleeding across small case series with short follow-up. ^1,2 - Reported dilation series are limited by inconsistent balloon diameters, varying numbers of dilatations, and short follow-up, precluding delineation of exact efficacy. ³ - For anal/pouch stenosis specifically, outcomes derive from small cohorts with high recurrence — e.g. recurrence within 3 years in 60% after dilation under anesthesia. ^4,5

What is unknown / caveats

- No high- vs low-pressure comparison in retrieval; only balloon size/diameter data - Anal-stenosis-specific data is sparse and mixed with anastomotic/pouch stricture series - Several retrieved chunks are off-topic (dermatology, HBOT) and non-contributory - The corpus does not contain a head-to-head high-pressure versus low-pressure dilation trial to answer the question as framed.

## References

1. Crespi M, Dulbecco P, De Ceglie A, Conio M. Strictures in Crohn's Disease: From Pathophysiology to Treatment. Dig Dis Sci. 2020;65(7):1904-1916. PMID: 32279173.

2. [No authors listed]. Strictureplasty for ileo-colic anastomotic strictures in Crohn's disease. Int J Colorectal Dis. 1991;6(4):214-6. PMID: 1770290.

3. Bharadwaj S, Narula N, Tandon P, Yaghoobi M. Role of endoscopy in inflammatory bowel disease. Gastroenterol Rep (Oxf). 2018;6(2):75-82. PMID: 29780594.

4. Aviran E, Zaghiyan K, Fleshner P. The Surgical Management of Ileal Pouch Strictures. Dis Colon Rectum. 2022;65(S1):S105-S112. PMID: 36399770.

5. Fumery M, Patel NS, Boland BS, Dulai PS, Singh S, Sandborn WJ. Efficacy and Safety of Endoscopic Balloon Dilatation of Ileoanal Pouch Strictures. Inflamm Bowel Dis. 2018;24(6):1316-1320. PMID: 29697797.

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_Draft — generated by the IBDology RAG and not yet clinician-reviewed. Answers are grounded in the retrieved literature listed above; a high faithfulness score means the answer matches its sources, not that the sources are correct._