Anorectal manometry (ARM)
Anorectal manometry measures the ability of the anus and rectum muscles
to function normally. This is a key study in fecal incontinence and constipation.
During the procedure, your physician inserts a narrow, flexible tube into
your anus and rectum. Once the tube is in place, a small balloon at the
tip of the tube may be expanded, allowing your physician to determine
your ano-rectal function.