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Anal fissure — Clinical Guidelines

Overview

Anal fissures are common, painful tears in the lining of the anal canal, often leading to significant patient discomfort and potential chronicity if not promptly treated. 1 3

Diagnosis

Clinical presentation: Pain during bowel movements, bleeding, and sometimes anal spasm.

Anoscopy: Essential for visual confirmation and grading of fissure severity. 1

Manometry: Increased resting anal pressure may be observed, though not necessarily due to sphincter spasm. 4

Management

First-line treatments:

- Dietary modifications: High-fiber diet to soften stools. - Topical therapies: Calcium channel blockers (e.g., diltiazem) or nitroglycerin ointments to reduce sphincter spasm. - Stool softeners: To ease passage and promote healing.

Adjunctive treatments:

- Botulinum toxin: Injection into the internal anal sphincter when topical treatments fail. - Anal dilatation: Precise dilatation using Parks' retractor or rectosigmoid balloon as an alternative to surgery, with high success rates (93-94%). 2

Special Populations

Pregnancy: Specific management strategies not detailed in abstracts; conservative approaches recommended.

Pediatrics: Not explicitly addressed in provided abstracts.

Elderly: Conservative nonsurgical approaches favored to avoid complications like incontinence. 1

Comorbidities: Management should consider coexisting conditions like hemorrhoids, ensuring comprehensive care. 1

Key Recommendations

Primary nonsurgical management is effective for most anal fissures, focusing on reducing sphincter spasm and promoting healing through topical agents and dietary changes. (Evidence: Strong 1)

Consider anal dilatation as a successful alternative to surgical sphincterotomy, particularly to minimize complications associated with traditional surgical interventions. (Evidence: Moderate 2)

Evaluate sphincter function using manometry to guide treatment, recognizing that increased resting pressure may not always indicate true sphincter spasm. (Evidence: Weak 4)

References

1 Mathur N, Qureshi W. Anal fissure management by the gastroenterologist. Current opinion in gastroenterology 2020. link 2 Sohn N, Eisenberg MM, Weinstein MA, Lugo RN, Ader J. Precise anorectal sphincter dilatation--its role in the therapy of anal fissures. Diseases of the colon and rectum 1992. link 3 Allan A, May R. Anal fissure. British journal of hospital medicine 1985. link 4 Kuypers HC. Is there really sphincter spasm in anal fissure?. Diseases of the colon and rectum 1983. link

Anal fissure