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Updated: Jul 5, 2026
06:39
Real-Time Void Spot Assay
Published on: February 10, 2023
Normal voiding patterns assessed by means of a frequency-volume chart.
Charlotte Graugaard-Jensen1, Frank Schmidt, Henrik Frederik Thomsen
1Institute of Clinical Medicine, University Hospital of Aarhus, Skejby Sygehus, Aarhus, Denmark. graugaard@ki.au.dk
Scandinavian Journal of Urology and Nephrology
|April 25, 2008
Summary
Elderly males void smaller volumes during the day but equal volumes at night compared to younger males. This suggests elderly individuals can adjust their average voided volume (AVV) to accommodate nocturnal urine output.
Area of Science:
- Gerontology
- Urology
- Physiology
Background:
- Voiding dysfunction is a common issue in the elderly population.
- Understanding diurnal and nocturnal urine output patterns is crucial for managing bladder health in aging individuals.
Purpose of the Study:
- To investigate the mechanisms behind diurnal and nocturnal urine output patterns in young and elderly males.
- To assess bladder reservoir function differences between age groups during day and night.
Main Methods:
- A 3-day frequency-volume chart (FVC) was used to record fluid intake and urine output.
- Voided volume, voiding frequency, maximum voided volume (MVV), and average voided volume (AVV) were analyzed.
- Participants included young males (n=25, median age 25) and elderly males (n=18, median age 61.1).
Main Results:
- Elderly males had significantly lower average fluid intake than young males.
- No significant difference in nocturnal average voided volumes (AVV) was observed between groups.
- Elderly males exhibited significantly different maximum voided volumes (MVV) compared to young males.
Conclusions:
- Young and elderly males void equal average urine volumes at night.
- Elderly males void smaller volumes during the daytime compared to young males.
- Elderly individuals demonstrate an ability to adjust their average voided volume to match nocturnal urine output.
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