兒童膀胱容量與頻尿

王士綱¹、鐘伯恩¹、楊緒棣^1,2

佛教慈濟醫療財團法人台北慈濟醫院 泌尿科; 慈濟大學 醫學系

Bladder capacity and urinary frequency in children

Shih-Gang Wang¹, Bor-En Jong¹, Shei-Dei Yang^1,2

Division of Urology, Taipei Tzu Chi Hospital, Tzu Chi Medical Foundation, New Taipei City 231, Taiwan; School of Medicine, Buddhist Tzu Chi University, Hualien, Taiwan

Purpose:

To evaluate the relationship between bladder capacity and symptom severity in children with isolated urinary frequency.

Materials and Methods:

During 2006 to 2021, we recruited 44 children with isolated urinary frequency, i.e., without urinary incontinence or the other lower urinary tract symptoms. Bladder capacity is defined as the larger one of maximum voided volume from 48-hour voiding diary or by uroflowmetry with ultrasound post-void volume measurement. Bladder capacity was compared to the estimated bladder capacity (EBC) in each patient. Statistical analysis was done by a commercial software of MedCalc version 20.114.

Results:

Maximum voided volume or bladder capacity > EBC was noted in one third (N=15) of the patients. While bladder capacity < EBC was noted in 66% (N=29) of the patients. The patients who had bladder capacity larger than their estimated bladder capacity had lesser daily frequency than those who have smaller bladder capacity than their estimated bladder capacity (mean daily frequency: 11.9667 versus 12.2414, p=0.046). There was no statistical difference of age (5.5322 versus 7.9460, p=0.051) and gender (male: 60% versus 62%, p=0.869) between the two groups.

Conclusion:

In the children with isolated urinary frequency, small bladder capacity could not explain all the symptoms. However, the patients who have bladder capacity larger than their estimated bladder capacity did have significant lesser severity of daily frequency than those with smaller bladder capacity.