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South African Journal of Surgery

versão On-line ISSN 2078-5151

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OTHMAN, Ibrahim. Bilateral versus posterior injection of botulinum toxin in the internal anal sphincter for the treatment of acute anal fissure. S. Afr. j. surg. [online]. 2010, vol.48, n.1, pp. 20-22. ISSN 2078-5151.

AIM: Comparison of bilateral versus posterior injection of botulinum toxin into the internal anal sphincter for treatment of acute anal fissure. METHODS: Forty patients with acute anal fissure were randomly divided into two equal groups. Group 1 was treated by injecting 20 units of botulinum toxin into each side of the internal anal sphincter, and group 2 by injecting 25 units of botulinum toxin into the midline posteriorly. RESULTS: The mean time to pain relief was 8.45 (standard deviation (SD) 7.41) days in group 1 and 7.20 (SD 7.19) days in group 2. Healing took place in a mean of 5.20 (SD 1.85) weeks in group 1 and 5.40 (SD 2.01) weeks in group 2. Fissures failed to heal in 2 patients in group 1 and 3 in group 2, and recurred in 4 patients in group 1 and 3 in group 2. CONCLUSION: Botulinum toxin injection is effective in treating acute anal fissure. A single posterior injection is easier and less painful than bilateral injection, and is as effective in pain relief.

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