A descriptive study to analyze the effect of change in flow rates of oxygen on the effective concentration of oxygen obtained using drug nebuliser mask and different venturi valves with mask

Effect of change in flow rates of driving oxygen on the device output and effective FiO2 obtained in the postoperative patients using drug nebulizer or different venturi valves with masks for oxygen therapy â?? a descriptive pilot study

Status

Active, not recruiting

Phases

Phase 4

Study type

Interventional

Source

CTRI

Registry ID

CTRI/2017/01/007723

Enrollment

Registered

2017-01-19

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- Post-operative patients operated for lower abdominal or lower limb surgeries under regional anaesthesia

Interventions

Intervention1: Oxygen therapy: Various flow rates of oxygen Will be administered using various devices. Control Intervention1: Venturi valves, drug nebuliser mask: FiO2 at various flow rates will be c

Eligibility

Inclusion criteria

Inclusion criteria: Post operative ASA-1 patients planned for lower limb or lower abdominal surgery under regional anaesthesia and having normal ventilatory pattern.

Exclusion criteria

Exclusion criteria: Those 20 years or 40 years, body mass index 25kg/m2 will not be included. patients having active upper respiratory tract infection,deviated nasal septum,nasal polyp or any other cause of nasal obstruction,bleeding tendencies/past history of epistaxis,family history of bleeding disorders and past history of basal skull fracture will be excluded.

Design outcomes

Primary

Measure	Time frame
Effective FiO2 delivered to the patient with each test device with driving oxygen flow rate of 1-15 L/min in increments of 1L/min eachTimepoint: Every minute for 3 minutes after changing flow rate.	—

Secondary

Measure	Time frame
FO2 of each of the test device with driving oxygen flow rate of 1-15 L/min in increments of 1L/min each. 2. Total gas flow output at the patient end of each of the test device with driving oxygen flow rate of 1-15 L/min in increments of 1L/min each. 5 3. Behaviour of the six venturi valves in terms of their performance as fixed or variable, at flows higher or lower than those recommended by the manufacturer.Timepoint: 1 min interval	—

Measure

Time frame

FO2 of each of the test device with driving oxygen flow rate of 1-15 L/min in increments of 1L/min each. 2. Total gas flow output at the patient end of each of the test device with driving oxygen flow rate of 1-15 L/min in increments of 1L/min each. 5 3. Behaviour of the six venturi valves in terms of their performance as fixed or variable, at flows higher or lower than those recommended by the manufacturer.Timepoint: 1 min interval

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Countries

India

Contacts

Public ContactDr Aarushi jain

University College of Medical Sciences and GTB Hospital

aarushijain90v@gmail.com8860755886

Outcome results

None listed

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