Assessment of bladder function for stabilizing urinary volume overnight with recording of brain waves

The study for demonstrating that the ability of the bladder to absorb urine and adjust its volume during bedtime contributes to the maintenance of sleep - the ABSORB study

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000037272

Enrollment

Registered

2019-09-01

Start date

2019-08-20

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Nocturia

Interventions

- Indwelling of Foley catheter - Setting of a portable electroencephalograph - Injection of indigocarmine solution 20 mL into the bladder - Period: a night

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: No urination during bedtime

Exclusion criteria

Exclusion criteria: Awakening by urination during bedtime

Design outcomes

Primary

Measure	Time frame
Temporal change of estimated bladder volume based on urinary indigocarmine concentration	—

Countries

Japan

Contacts

Public ContactKazumasa Torimoto

Nara Medical University Department of Urology

torimoto@naramed-u.ac.jp0744-22-3051

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026