A new simplified technique for pediatric anorectal manometry.

Area of Science:

• Pediatric Gastroenterology
• Anorectal Physiology
• Diagnostic Techniques

Background:

• Fecal incontinence and constipation are common in children, often linked to anorectal dysfunction.
• Accurate assessment of anal sphincter function is crucial for diagnosis and management.
• Existing methods can be invasive or time-consuming.

Purpose of the Study:

• To introduce and evaluate a simple, rapid, and well-tolerated technique for assessing anal sphincter function in pediatric patients.
• To determine the efficacy of this technique in identifying specific anorectal disorders, including aganglionic megacolon.

Main Methods:

• A microtip pressure transducer was employed to record anal sphincter responses.
• Rectal balloon distension was used to elicit sphincter responses.
• The procedure was performed on 86 pediatric patients with varying degrees of anorectal dysfunction.

Main Results:

• The technique yielded results within 15 to 30 minutes.
• In 17 patients, absent or abnormal internal anal sphincter response to balloon distension indicated aganglionic megacolon, confirmed by biopsy.
• Sixty-nine children demonstrated normal internal sphincter relaxation, with biopsy confirming ganglion cells in nine cases.

Conclusions:

• This novel technique is effective and well-tolerated for the initial evaluation of pediatric constipation and encopresis.
• It provides rapid and accurate assessment of anal sphincter function, aiding in the diagnosis of conditions like aganglionic megacolon.
• The method demonstrated high diagnostic accuracy with no false-positive or false-negative results.