The sleepiness induction by adjusting ambient carbon dioxide level

The sleepiness induction by adjusting ambient carbon dioxide level - Ambient carbon dioxide and sleepiness

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000035694

Enrollment

Registered

2019-01-28

Start date

2019-01-28

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

Healthy adult volunteers

Interventions

ambient C02 level (0.04% 60 min, 0.4% 60 min, 4% 10min)

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Those who is capable of determining the participation to the study by his/her own will.

Exclusion criteria

Exclusion criteria: 1. Those with either sleep, cardiovascular, respiratory disorder. 2. Habitual sleep medication user.

Design outcomes

Primary

Measure	Time frame
Subjective sleepiness (KSS-J), EEG (alpha and delta wave power)	—

Secondary

Measure	Time frame
Heart rate, blood pressure, transcutaneous oxygen and carbon dioxide concentration(tcp02/tcpCO2), body temperature	—

Countries

Japan

Contacts

Public ContactRyoichi Nagatomi

Tohoku University Graduate School of Biomedical Engineering

nagatomi@med.tohoku.ac.jp+81-22-717-8586

Outcome results

None listed

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