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comparing normal breathing for 3 minutes and 8 deep breaths in 1 minute to achieve better oxygenation before giving general anaesthesia

a prospective, randomized controlled, crossover study of effectiveness of two preoxygenation techniques : breathing 100% oxygen at 8 vital capacity breaths in 1 minute vs tidal volume breathing for 3 minutes in patients undergoing elective surgery under general anaesthesia

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2017/05/008498
Enrollment
270
Registered
2017-05-05
Start date
Unknown
Completion date
Unknown
Last updated
2021-11-24

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

Conditions

Health Condition 1: null- preoxygenation / denitrogenation

Interventions

Intervention1: 3 minutes tidal volume breathing: patient is asked to breath 100% oxygen through a closed circuit and tight fitting mask for 3 minutes at normal tidal volume and rate Intervention2: 8 v

Sponsors

P D Hinduja National Hospital and MRC
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: ASA physical status I and II patients posted for elective surgery under general anaesthesia

Exclusion criteria

Exclusion criteria: 1.pre existing respiratory or cardiac diseases 2.anticipated difficult airway 3.pregnancy 4.anticipated difficult mask ventilation 5.uncooperative patients 6.claustrophobia 7.patient refusal

Design outcomes

Primary

MeasureTime frame
To identify which technique of preoxygenation : 3 minutes tidal volume breathing and eight vital capacity breaths, is effective across the study group.Timepoint: 3 minutes for tidal volume breathing and 8 vital capacity breaths—

Secondary

MeasureTime frame
To identify which technique of preoxygenation : 3 minutes tidal volume breathing and eight vital capacity breaths, is effective in overweight and obese patients.Timepoint: 3 minutes for tidal volume breathing and 8 vital capacity breaths—

Countries

India

Contacts

Public ContactDr Anup Nawal

P D Hinduja National Hospital and MRC

dranjalipingle@gmail.com9833733915

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 4, 2026