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Related Experiment Video

Updated: Jun 20, 2026

In Vivo Luminal Measurement of Distension-Evoked Urothelial ATP Release in Rodents

In Vivo Luminal Measurement of Distension-Evoked Urothelial ATP Release in Rodents

Published on: September 7, 2022

24-hour rectal manometry for overactive bladder.

Iben Moeller Joensson¹, Soren Hagstroem, Klaus Krogh

¹Institute of Clinical Medicine, University of Aarhus, Aarhus, Denmark. iben.jonsson@ki.au.dk

The Journal of Urology

|August 22, 2009

Summary

Children with overactive bladder exhibit three distinct rectal motility patterns, with increased activity during the night. No interaction was found between rectal and bladder activity during defecation or urination.

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Cystometric and External Urethral Sphincter Measurements in Awake Rats with Implanted Catheter and Electrodes Allowing for Repeated Measurements

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Published on: January 30, 2018

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Last Updated: Jun 20, 2026

In Vivo Luminal Measurement of Distension-Evoked Urothelial ATP Release in Rodents

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Published on: September 7, 2022

Cystometric and External Urethral Sphincter Measurements in Awake Rats with Implanted Catheter and Electrodes Allowing for Repeated Measurements

Cystometric and External Urethral Sphincter Measurements in Awake Rats with Implanted Catheter and Electrodes Allowing for Repeated Measurements

Published on: January 30, 2018

Area of Science:

Pediatric Gastroenterology
Urology
Physiology

Background:

Overactive bladder (OAB) in children can impact quality of life.
Understanding rectal motor function is crucial for managing OAB symptoms.

Purpose of the Study:

To characterize rectal motor activity patterns in children with nonneuropathic overactive bladder.
To investigate potential rectum-bladder interactions during defecation and micturition.

Main Methods:

Prolonged rectal manometry was performed on 10 children (mean age 9.7 years) with OAB.
Urodynamic studies and 24-hour rectal manometric recordings were analyzed visually.
Rectal contractions were defined as pressure exceeding 5 cm H(2)O for over 5 seconds.

Main Results:

Three distinct rectal motility patterns were identified: slow tonic waves, rectal motor complexes, and single contractions.
Nocturnal rectal motor complex duration and total contraction time were significantly greater than during the day (p <0.05).
Characteristic rectal activity occurred during defecation and voiding, but no bladder-rectum interaction was detected.

Conclusions:

Children with overactive bladder demonstrate three specific rectal motility patterns.
The rectum exhibits periodic motor activity, similar to the upper gastrointestinal tract, with increased nocturnal frequency.
No association was found between bladder and rectal activity during micturition and defecation in this cohort.