Kawauchi Akihiro, Tanaka Yoshiyuki, Naito Yasuyuki, Yamao Yutaka, Ukimura Osamu, Yoneda Kimihiko, Mizutani Yoichi, Miki Tsuneharu
Department of Urology, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kyoto, Japan.
Urology. 2003 May;61(5):1016-8. doi: 10.1016/s0090-4295(02)02515-3.
To evaluate bladder capacity at the time of enuresis and compare the daytime capacity of enuretics with that of controls.
The functional bladder capacity (FBC), which was the maximal endurable capacity in the daytime, the ordinary bladder capacity (OBC), which was the capacity at ordinary urinary sensation in the daytime, and the enuretic bladder capacity (EBC), which was the capacity at the time of enuresis, were measured in 67 patients with monosymptomatic nocturnal enuresis. The EBC was measured using a diaper and enuresis alarm. The FBC, OBC, and nocturnal bladder capacity, which was the maximal voided volume in the nighttime, were also measured in 67 controls.
The FBC was not significantly different between enuretics and controls. The EBC in enuretics was significantly smaller than the nocturnal bladder capacity in controls. In enuretics, the EBC was significantly smaller than the FBC and was similar to the OBC. In controls, no statistically significant differences were found between the FBC and the nocturnal bladder capacity.
In enuretics, the bladder capacity during sleep was significantly smaller than the daytime functional capacity. In controls, on the other hand, the bladder capacity during sleep did not differ from the daytime functional capacity. Our understanding of the bladder capacity in enuretics may need to change in view of this result. The inability to hold urine during sleep may be an important cause of nocturnal enuresis.
评估遗尿时的膀胱容量，并比较遗尿症患者与对照组的日间膀胱容量。
对67例单纯性夜间遗尿患者测量其日间最大耐受容量即功能性膀胱容量（FBC）、日间正常尿意时的容量即普通膀胱容量（OBC）以及遗尿时的膀胱容量即遗尿膀胱容量（EBC）。使用尿布和遗尿警报器测量EBC。还对67例对照者测量了FBC、OBC以及夜间最大排尿量即夜间膀胱容量。
遗尿症患者与对照者的FBC无显著差异。遗尿症患者的EBC显著小于对照者的夜间膀胱容量。在遗尿症患者中，EBC显著小于FBC且与OBC相似。在对照者中，FBC与夜间膀胱容量之间未发现统计学上的显著差异。
在遗尿症患者中，睡眠期间的膀胱容量显著小于日间功能容量。另一方面，在对照者中，睡眠期间的膀胱容量与日间功能容量无差异。鉴于这一结果，我们对遗尿症患者膀胱容量的认识可能需要改变。睡眠期间无法憋尿可能是夜间遗尿的一个重要原因。
