For culture, looking for urine infection, traditionally midstream urine, or at least clean catch.  Hard if not toilet trained.

Ideally, avoid first portion of sample (easier if toilet trained), more likely to be contaminated.

Need to be well hydrated, of course.

In/out catheter and suprapubic aspiration are quick but invasive and unpleasant.

For babies, “Dangle-tap” urine collection method –

• Feed first!
• Then hold the baby under their armpits with their legs dangling (parent can do). Another person then starts bladder stimulation – gentle tapping in the suprapubic area at a frequency of 100 per minute for 30 s.
• The third step is stimulation of the lumbar paravertebral zone in the lower back with a light circular massage for 30 s. Repeat as necessary.
• Babies hate the suprapubic tapping, but often pee when you switch to back rub.

86% successful within 5 minutes, mean 57secs! Over 3 months hard as heavy and actively resisting.

Older babies – try Quick Wee – gentle suprapubic cutaneous stimulation using gauze soaked in cold fluid for 5 mins. 30% successful within 5 minutes.

[Madrid Infanta Sofia hospital, as reported in Arch Dis Child
2013;98:27-29 doi:10.1136/archdischild-2012-301872]]