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Construction of and Conversion to Continent Ileostomy: A Systematic Review
Athanasios Angistriotis1, Bo Shen, Ravi Pokala Kiran
1Division of Colorectal Surgery and Center for Inflammatory Bowel Disease, Department of Surgery, Columbia University Medical Center, New York, New York.
Background:
Continent ileostomy was first introduced by Nils Kock in 1969 as Kock pouch (K-pouch). Its most characteristic feature, the nipple valve that offers continence' was a later addition. Even though today's continent ileostomy is sidelined by ileal pouch-anal anastomosis as the gold standard of restorative procedures for colectomy patients, it remains an excellent option for select patients, offering an alternative to end-ileostomy or a poorly functioning ileoanal pouch.
Objective:
The study aimed to summarize principles and techniques behind K-pouch construction, both de novo and as "J to K" conversion, as well as examine surgical outcomes following the procedure in the modern era regardless of indication.
Data Sources:
Data sources included PubMed and the Cochrane Library up to July 2021.
Study Selection:
The study selection materials included articles reviewing continent ileostomy procedures and outcomes between 2000-2021. Case reports and series <15 were excluded.
Results:
Fifteen articles were selected for review, describing 958 patients with a K-pouch, 510 patients who had undergone a Barnett continent intestinal reservoir, and 40 who had undergone construction of a T-pouch.
Conclusion:
Continent ileostomies carried out in specialized centers by experienced surgeons can be a great option for patients who would otherwise be confined by an end ileostomy. High pouch survival rates with higher quality-of-life scores than end ileostomy and comparable with IPAA make continent ileostomy a great option, even if we consider the less than ideal reoperation and complication rates. However, it is of paramount importance that patients are carefully selected, thoroughly educated, highly motivated, and engaged in their care. Specifically, for patients with Crohn's disease, further research is needed to help elucidate factors that affect pouch survival and candidacy for K-pouch creation. Finally, continuous surgical technique modifications and refinements can allow even more patients to be considered suitable for the procedure.
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