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Published in: World Journal of Surgery 12/2016

Open Access 01-12-2016 | Original Scientific Report

Botulinum Toxin Injection for Treatment of Chronic Anal Fissure: Is There Any Dose-Dependent Efficiency? A Meta-Analysis

Authors: Adam Bobkiewicz, Wojciech Francuzik, Lukasz Krokowicz, Adam Studniarek, Witold Ledwosiński, Jacek Paszkowski, Michal Drews, Tomasz Banasiewicz

Published in: World Journal of Surgery | Issue 12/2016

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Abstract

Background

Chronic anal fissure (CAF) is a linear split of the anoderm. The minimally invasive management of CAF such as botulinum toxin (BT) injection is recommended. However, the exact efficient dose of BT, number of injections per session and the injection sites are still debatable. The aim of this analysis was to assess the dose-dependent efficiency of botulinum toxin injection for CAF.

Methods

PubMed and Web of Science databases were searched for terms: “anal fissure” AND “botulinum toxin.” Studies published between October 1993 and May 2015 were included and had to meet the following criteria: (1) chronic anal fissure, (2) prospective character of the study, (3) used simple BT injection without any other interventions and (4) no previous treatment with BT.

Results

A total of 1577 patients from 34 prospective studies used either Botox or Dysport formulations were qualified for this meta-analysis. A total number of BT units per session ranged from 5 to 150 IU, whereas the efficiency across analyzed studies ranged from 33 to 96 %. Surprisingly, we did not observe a dose-dependent efficiency (Spearman’s rank correlation coefficient, ρ = 0.060; p = 0.0708). Moreover, there were no BT dose-dependent postoperative complications or fecal incontinence and significant difference in healing rates compared BT injection into the anal sphincter muscles.

Conclusions

BT injection has been an accepted method for the management of CAF. Surprisingly, there is no dose-dependent efficiency, and the postoperative incontinence rate is not related to the BT dosage regardless the type of formulation of botulinum neurotoxin used. Moreover, no difference in healing rate has been observed in regard to the site and number of injections per session.
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Metadata
Title
Botulinum Toxin Injection for Treatment of Chronic Anal Fissure: Is There Any Dose-Dependent Efficiency? A Meta-Analysis
Authors
Adam Bobkiewicz
Wojciech Francuzik
Lukasz Krokowicz
Adam Studniarek
Witold Ledwosiński
Jacek Paszkowski
Michal Drews
Tomasz Banasiewicz
Publication date
01-12-2016
Publisher
Springer International Publishing
Published in
World Journal of Surgery / Issue 12/2016
Print ISSN: 0364-2313
Electronic ISSN: 1432-2323
DOI
https://doi.org/10.1007/s00268-016-3693-9

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