Characterization of anorectal pressure and the anorectal inhibitory reflex in healthy preterm and term infants

Characterization of anorectal pressure and the anorectal inhibitory reflex in healthy preterm and term infants

Objectives: To evaluate anorectal motor function in healthy premature and term infants with the use of micromanometric techniques. Study design: Anorectal manometry was performed in 22 healthy neonates (9 female) with a mean postmenstrual age of 32 weeks (range, 30 to 38 weeks) with a micromanometri...

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Published in:The Journal of pediatrics Vol. 139; no. 2; pp. 233 - 237
Main Authors: Benninga, Marc A., Omari, Taher I., Haslam, Ross R., Barnett, Chris P., Dent, John, Davidson, Geoff P.
Format: Journal Article
Language:English
Published: New York, NY Mosby, Inc 01-08-2001
Elsevier
Subjects:
Anal Canal - physiology
Analysis of Variance
Biological and medical sciences
Female
Functional investigation of the digestive system
Gestational Age
Humans
Infant, Newborn
Infant, Premature
Investigative techniques, diagnostic techniques (general aspects)
Male
Manometry - instrumentation
Manometry - methods
Medical sciences
Pressure
Reflex
AR
PMA
Human
Manometry
Premature
Reflex
Evaluation
Healthy subject
Catheter
Exploration
Anorectal
Sleeve
Microscopic model
Normal
Newborn
Inhibition
Pressure measurement
Technique
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Summary:Objectives: To evaluate anorectal motor function in healthy premature and term infants with the use of micromanometric techniques. Study design: Anorectal manometry was performed in 22 healthy neonates (9 female) with a mean postmenstrual age of 32 weeks (range, 30 to 38 weeks) with a micromanometric anorectal assembly (od 2.0 mm). The assembly incorporated a 2-cm-long sleeve sensor for measurement of resting anal sphincter pressures and relaxation, and 4 sideholes recorded anal and rectal pressures. Rectal distension was performed with a latex balloon or direct air insufflation to elicit the anorectal inhibitory reflex (AR). Results: The mean anal sphincter pressure, rectal pressure, and rhythmic wave frequency were 40 mm Hg (range, 7 to 65 mm Hg), 11 mm Hg (range, 1 to 27 mm Hg), and 10/min (range, 8 to 14/min), respectively. A normal AR could be elicited in 21 of the 22 infants studied. Conclusion: An anorectal micromanometric sleeve catheter is suitable for use in evaluating anorectal pressures in preterm and term neonates. Insufflation of air without the use of a balloon to elicit the AR is reliable and suitable for use in infants <34 weeks. Premature infants older than 30 weeks’ postmenstrual age have normal anorectal pressures and a normal AR. (J Pediatr 2001;139:233-7)
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-3476
1097-6833
DOI:10.1067/mpd.2001.115969