Anorectal motility abnormalities in children with encopresis and chronic constipation

Area of Science:

• Pediatric Gastroenterology
• Physiology
• Colorectal Disorders

Background:

• Chronic constipation is a common pediatric issue.
• Encopresis, or fecal incontinence, often co-occurs with chronic constipation.
• Understanding the underlying mechanisms is crucial for effective treatment.

Purpose of the Study:

• To compare the rectal distension response in children with chronic constipation versus those with chronic constipation and encopresis.
• To investigate potential differences in anorectal motility between these groups.

Main Methods:

• A study involving 27 children (ages 3-16) with chronic constipation, 12 of whom also had encopresis.
• Anorectal manometry using a solid-state catheter to measure internal sphincter response to rectal balloon inflation (60 mL air).

Main Results:

• No significant differences were found in age, sex, or constipation duration between the groups.
• Key manometric parameters like resting pressure and relaxation pressure did not differ.
• However, children with encopresis exhibited significantly longer times for maximum relaxation, recovery to baseline, and overall relaxation duration.

Conclusions:

• Children with chronic constipation and encopresis may have impaired neuromuscular control of defecation.
• Prolonged internal anal sphincter relaxation and delayed recovery times could explain incontinence in encopretic children.