Maturation of the rectoanal response in premature and perinatal infants

Area of Science:

• Pediatric Gastroenterology
• Neonatology
• Surgical Diagnostics

Background:

• Chronic constipation is a common issue in infants and children.
• Hirschsprung's disease is a significant cause of constipation requiring timely diagnosis.
• Rectal biopsies are invasive and sometimes unnecessary for diagnosing Hirschsprung's disease.

Purpose of the Study:

• To evaluate the safety and reliability of anorectal manometry as a screening tool for Hirschsprung's disease.
• To determine the utility of anorectal pressure studies in avoiding unnecessary rectal biopsies.
• To establish criteria for interpreting manometric findings in different infant populations.

Main Methods:

• Manometric anorectal pressure studies were performed on 20 premature/perinatal infants and 40 older infants/children with chronic constipation.
• The rectoanal inhibitory reflex was assessed.
• Results were correlated with clinical presentation and need for biopsy.

Main Results:

• Anorectal manometry proved to be a safe and reliable screening method.
• A normal rectoanal reflex effectively ruled out Hirschsprung's disease, avoiding biopsies.
• Absence of a normal reflex necessitated further diagnostic evaluation, typically tissue diagnosis.
• Premature infants under 39 weeks' maturational age and weighing less than 6 lb did not exhibit a normal reflex.

Conclusions:

• Anorectal manometry is a valuable, non-invasive tool for screening Hirschsprung's disease in pediatric populations.
• This method can significantly reduce the number of unnecessary rectal biopsies.
• Specific maturational and weight criteria are important for interpreting results in very young infants.