Sphincter-sparing procedures for rectal fistulas are becoming more popular among coloproctologists. However, the outcomes are not optimal that forces surgeons to seek new approaches in order to improve results. Seton drainage prior to radical stage is one of these methods. The effect of seton drainage on the outcomes is reviewed in the article. Elibrary, Pubmed and Google Scholar databases were analyzed. We have assessed 14 out of 151 trials for the period 1984 - 2017. There were no significant advantages of seton drainage compared with single-stage approach (χ = 3.84, p> 0.05, RR = 0.95, CI 95% 0.84 - 1.08). The same situation is observed for mucomuscular flap bringing down to close internal fistula. Fistula healing was more common after seton drainage deployment within 4 - 8 weeks. Bringing down of the flap to anal canal should be preferred after drainage due to less incidence of recurrences. Further trials are necessary to determine advisability of seton drainage and optimal surgical approach.
Despite a thousand-year history of anal fistula treatment, long-term outcomes have not been optimal, which encourages us to explore new surgical approaches. One of the methods of surgical treatment of anal fistulas is the use of ligature (Seton) in its different modifications. This review analyzes the literature data on the use of different modifications of seton treatment of anal fistulas. The analysis of publications showed the great interest in the use of the method, yet there is neither clear scheme nor systematic approach to applying it in clinical practice. Further study, as well as randomized researches, are required to find the optimal treatment and improve surgery results of using seton when dealing with anal fistula.
The review presents data from the analysis of the literature on various options of using negative pressure wound therapy after abdominal-perineal extirpation of the rectum. We have selected 10 scientific papers for analysis, and no randomized trials have been found in the literature. The use of local negative pressure led to an acceleration of tissue repair and a decrease in complications in the perineal wound area. However, at the moment, the data presented in the literature are insufficient for an objective assessment of the effectiveness of the technique. It is necessary to conduct randomized trials to objectively evaluate the methodology.
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