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23.03.2017 | Original Scientific Report | Ausgabe 9/2017

World Journal of Surgery 9/2017

Advancement Flap for Treatment of Complex Cryptoglandular Anal Fistula: Prediction of Therapy Success or Failure Using Anamnestic and Clinical Parameters

Zeitschrift:
World Journal of Surgery > Ausgabe 9/2017
Autoren:
Lars Boenicke, Eduard Karsten, Hubert Zirngibl, Peter Ambe

Abstract

Background

Multiple new procedures for treatment of complex anal fistula have been described in the past decades, but an ideal single technique has yet not been identified. Factors that predict the outcome are required to identify the best procedure for each individual patient. The aim of this study was to find those predictors for advancement flap at midterm follow-up.

Methods

From 2012 to 2015 in a tertiary university clinic, all patients who underwent advancement flap for treatment of complex cryptoglandular fistula were prospectively enrolled. Pre- and postoperatively standardized anamnestic and clinical examinations were performed. Predictive factors for therapy failure were identified using univariate and multivariate analysis.

Results

Out of 65 patients, 61 (93%) completed all examinations and were included in the study. Therapy failure after a mean follow-up period of 25 months occurred in total n = 11 patients (18%). There was no significant disturbance of continence among the entire study cohort as shown by the incontinence score (preop 0.34 ± 0.91 pts., postop 0.37 ± 0.97 pts.; p = 0.59). Univariate analysis for risk factors for therapy failure revealed age ( p = 0.004), history of surgical abscess drainage ( p = 0.04), BMI ( p = 0.002), suprasphincteric fistula ( p = 0.019) and horseshoe abscess ( p = 0.036) as independent parameters for therapy failure. During multivariate analysis, only history of surgical abscess drainage (OR = 8.09, p = 0.048, 95% CI 0.98–64.96), suprasphincteric fistula (OR = 6.83, p = 0.032, 95% CI 1.17–6.83) and BMI (OR = 1.23, p = 0.017, 95% CI 1.03–1.46) were independent parameters for therapy failure.

Conclusion

Advancement flap for treatment of complex fistula is effective and has low risk of disturbed continence. BMI, suprasphincteric fistula and history of surgical abscess drainage are predictors for therapy failure.

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