Examination of the usefulness of pre-oxygenation techniques in obese patients using oxygenation reserve index

Examination of the usefulness of pre-oxygenation techniques in obese patients using oxygenation reserve index - Are head-up position and / or positive end expiratory pressure during preoxygenation useful in obese patients?

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000043127

Enrollment

Registered

2021-04-01

Start date

2021-01-26

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

Patients scheduled for surgery under general anesthesia

Interventions

During preoxygenation 1)25 degrees head-up position, PEEP 5-10 cmH2O + PSV 5-10 cmH2O 2)Supine, PEEP 0 cmH2O + PSV 0 cmH2O Carry out in order of 1 to 2 or b to a for 3 minutes. During preoxygenat

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients scheduled for surgery under general anesthesia Body mass index (BMI) 30 kg/m2 or above

Exclusion criteria

Exclusion criteria: Difficulty airway other than obesity such as facial malformation or genetic disease, serious respiratory and cardiovascular complications, pregnancy, emergency surgery. Anesthesiologists judged to be inappropriate for this study.

Design outcomes

Primary

Measure	Time frame
Duration from the end of preoxygenation to ORi=0	—

Countries

Japan

Contacts

Public ContactAYANA KANAYA

National Defense Medical College Department of Anesthesiology

doc31007@ndmc.ac.jp04-2995-1211

Outcome results

None listed

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