Negative pressure therapy and perineal sinus 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.