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Solid-sphere test for examination of anal sphincter strength.
Scandinavian Journal of Gastroenterology
|October 1, 1984
Summary
The solid-sphere test effectively measures anal sphincter strength to diagnose fecal incontinence. This simple, inexpensive method differentiates between continent and incontinent individuals based on force measurements.
Area of Science:
- Gastroenterology and Colorectal Surgery
- Physiology of Pelvic Floor Muscles
Background:
- Fecal incontinence significantly impacts quality of life.
- Accurate assessment of anal sphincter function is crucial for diagnosis and treatment planning.
Purpose of the Study:
- To evaluate the efficacy of the solid-sphere test in quantifying anal sphincter strength.
- To establish normative force values for assessing fecal incontinence severity.
Main Methods:
- A 2 cm diameter plastic sphere was inserted into the rectum and stepwise loaded.
- Patients contracted their anal sphincter to resist expulsion of the sphere.
- Maximal expulsion force was measured in Newtons (N).
Main Results:
- Continent individuals required >7 N force.
- Partially incontinent individuals required 5-7 N force.
- Totally incontinent individuals required <5 N force.
- A significant difference was observed between continent and totally incontinent groups.
Conclusions:
- The solid-sphere test is a simple, cost-effective, and valuable tool for evaluating fecal incontinence.
- It provides objective measurements of anal sphincter strength, aiding in diagnosis and management.
- This method offers clear differentiation between varying degrees of incontinence severity.