Skip to main content

Table 3 Expected age-related bladder capacity and interpretation of maximum and total voided volume overnight (all in milliliters), EBC calculated as: [30 + (age in years × 30)] in milliliters

From: Practical consensus guidelines for the management of enuresis

Age (years) BC (ml) MVV below listed volume = reduced bladder capacity; consider alarm Total volume below listed value = nocturnal polyuria; consider desmopressin
5 180 117 234
6 210 137 273
7 240 156 312
8 270 176 351
9 300 195 390
10 330 215 429
11 360 234 468
12 390 254 507
13 390 254 507
14 390 254 507
15 390 254 507
16 390 254 507
17 390 254 507
18 390 254 507
  1. A pronounced nocturnal arginine vasopressin deficiency is seen in desmopressin responders only on nights with enuresis—therefore, NP should only be looked for on wet nights [41]. Excessive nocturnal urinary volumes indicated by diary data and various additional signs are suggestive of underlying NP [43, 62], e.g., absorbent underpants totally soaked overnight, urine soaking through to the bedsheets, multiple episodes of wetting in one night, early wetting in the first third of the night, a large volume of urine at the first void in the morning despite wetting overnight, a low daytime fluid intake followed by the majority of the intake in the late afternoon and evening
  2. MVV maximum voided volume, EBC expected bladder capacity, NP nocturnal polyuria