What is the evidence that negative pressure wound therapy reduces persistent perineal sinus formation after proctectomy
no — the evidence for negative pressure wound therapy (NPWT) preventing persistent perineal sinus after proctectomy in Crohn's is thin and indirect, not robust 1–3. the strongest supporting signal comes from closed-incision negative-pressure therapy reducing perineal wound complications after abdominoperineal resection (an oncologic APR population, not Crohn's proctectomy) 1, and vacuum-assisted closure is described mainly as a management option for small, superficial established sinuses rather than a proven primary preventive 3. 1–4
What is known: - Closed-incisional negative-pressure therapy reduced perineal wound complications after abdominoperineal resection in a colorectal-cancer population. 1 - Prophylactic perineal NPWT is discussed as a strategy to prevent wound-related complications, but within narrative reviews rather than randomized data. 1,2 - Vacuum-assisted closure is described mainly for small, superficial non-healing sinuses, alongside debridement, flaps and omentoplasty. 3 - Perineal wound problems after proctectomy are frequent and variable (reported 23–79%), with persistent sinus affecting roughly half and up to a third unhealed at 12 months. 3,4
What is unknown / caveats: - Strongest NPWT signal is from APR for cancer, not Crohn's proctectomy - No randomized or pooled Crohn's-specific data on NPWT for sinus prevention in the retrieved excerpts - Evidence base is narrative reviews and citation lists, not primary comparative trials - Whether NPWT specifically reduces persistent perineal sinus formation after Crohn's proctectomy is not established by any retrieved primary comparative study.
## References
1. Stefan D H, Phil T. 10 Strategies for prevention of perineal wound dehiscence after intersphincteric proctectomy for perianal Crohn's disease. Tech Coloproctol. 2026. PMID: 42184029.
2. Rinebold E, Huang AL, Hahn SJ. How to Approach the Difficult Perineum in Crohn's Disease. Clin Colon Rectal Surg. 2025;38(2):148-159. PMID: 39944307.
3. [No authors listed]. Classifying perianal fistulising Crohn's disease: an expert consensus to guide decision-making in daily practice and clinical trials. Lancet Gastroenterol Hepatol. 2022;7(6):576-584. PMID: 35325623.
4. Chan XH, Koh CE, Glover M, Bryson P, Travis SP, Mortensen NJ. Healing under pressure: hyperbaric oxygen and myocutaneous flap repair for extreme persistent perineal sinus after proctectomy for inflammatory bowel disease. Colorectal Dis. 2014;16(3):186-90. PMID: 24267200.
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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._
Reviewer notes