anorectal manometry
Pronunciation: /ˌeɪ.noʊ.rek.tl̩ məˈnɒm.ɪ.tri/
Diagnostic test measuring pressure and coordination of anal sphincter muscles and rectal sensation.
Full Definition
A specialized diagnostic procedure that evaluates the function of the anal sphincters and rectum by measuring pressures and assessing coordination of defecation mechanisms. The test involves insertion of a catheter with pressure sensors into the rectum and anal canal to measure resting pressures, squeeze pressures, and the rectoanal inhibitory reflex. In pediatric patients, this test is particularly useful for diagnosing Hirschsprung disease, functional constipation, and anorectal malformations. The procedure requires patient cooperation and may need to be performed under sedation in younger children. Results help guide treatment decisions and surgical planning.
Usage
Usage note: Often abbreviated as ARM in clinical notes, but spell out in formal reports.
In Context
- "Anorectal manometry revealed absence of the rectoanal inhibitory reflex, consistent with Hirschsprung disease." — Diagnostic test report
- "The patient will undergo anorectal manometry to assess sphincter function before considering surgical intervention." — Clinical evaluation note