Bladder diary (48 hours)

A bladder diary helps assess your child’s voiding pattern when there is wetting, frequent urination or sudden urges. Fill it in for two days and bring it to the appointment. For bedwetting, measure the night urine volume over one week.

How to fill it in

Choose two days when your child follows a normal routine, for example a weekend.
Each time your child pees, have them pee into a measuring cup and write down the amount in ml.
Write down everything your child drinks (water, milk, tea, juice, soup) and how much.
Note any sudden, strong urge to pee, any wetting and any wet underwear.
Note whether your child wet the bed at night. For bedwetting, measure the night urine volume for one week (7 nights in a row) and write it in the weekly chart below. To work it out, subtract the weight of a dry diaper of the same type from the weight of the used diaper (a 1 g difference is about 1 ml of urine). Add the measured volume of any pee in the toilet during the night and the first pee in the morning. If a measurement is incomplete, note this, and do not write the missing volume as zero.
Do not count the first morning pee when working out the largest daytime voided volume.
Also note the time and form of bowel movements.

Child’s name and age: ______________________________

Day 1: ____ / ____ / ______

Time	Drank (what, ml)	Urine (ml)	Strong urge / wetting	Bowel movement

Bedwetting at night: yes / no. Used diaper: ____ g. Dry diaper: ____ g. Toilet at night: ____ ml. First morning pee: ____ ml.

Day 2: ____ / ____ / ______

Time	Drank (what, ml)	Urine (ml)	Strong urge / wetting	Bowel movement

Bedwetting at night: yes / no. Used diaper: ____ g. Dry diaper: ____ g. Toilet at night: ____ ml. First morning pee: ____ ml.

Night urine: 1 week

Night	Date	Wet (yes/no)	Used diaper (g)	Dry diaper (g)	Toilet at night (ml)	First morning pee (ml)	Total night urine (ml)
1
2
3
4
5
6
7

Bladder diary (48 hours)

Expected bladder capacity

How to fill it in

Sources