Acute hypoxemia is common and deadly in resource variable settings. While studies in high income countries (HICs) have indicated a possible benefit to high flow oxygen as compared with standard flow oxygen, rigorous studies in low or lower middle income countries (LMICs) have not been performed. Studies in sepsis have demonstrated that interventions that improve outcomes in one context may actually be neutral or harmful in a different context.
The goal of this study is to test whether high flow oxygen results in better outcomes for hypoxemic adult patients, as compared with standard flow oxygen, in five LMIC hospitals. The main questions it aims to answer are:
1. For hypoxemic adults in these LMIC study settings, does high flow oxygen or standard flow oxygen result in lower mortality? 2. What are the facilitators and barriers to using high flow oxygen in these settings? 3. Does high flow or standard flow oxygen use more oxygen?
Participants will be randomized to receive either high flow oxygen through a large nasal cannula, or to receive standard flow oxygen, through nasal cannulas, face masks, or non-rebreather masks. Researchers will compare the outcomes for the two groups, to see if one group of patients has better outcomes than the other.
The study will also examine how much oxygen is used by the two patient groups, as well as other factors relevant to the feasibility of implementation of high flow oxygen in these sites.
age>=18 years AND
admitted to a study site hospital within the 24 hours prior to screening AND
SpO2<90% at time of first assessment OR
receiving oxygen at time of first assessment
imminent death (high clinical suspicion of death within 24 hours of admission)
patient or caregiver refusal of study participation
history of chronic respiratory failure (SpO2<90% or oxygen dependence for at least three months)
anatomical factors precluding the use of nasal cannula
Parallel
High flow oxygen
Devicehumidified and heated oxygen delivered at high flow rates via nasal cannula, with protocol to target SpO2 90-94%
Standard flow oxygen
Other interventionoxygen delivered at standard flow rates via nasal cannula, facemask, or nonrebreather mask, with protocol to target SpO2 90-94%
In-hospital mortality
Death between randomization and end of hospitalization
90-day mortality
Death between randomization and 90 days
90-day functional status
Functional status 90 days after randomization, as measured by the World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0)
Need for mechanical ventilation
Met criteria for need to escalate respiratory therapy to NIV or invasive ventilation, or escalated to NIV or mechanical ventilation
Days requiring oxygen
Days requiring oxygen from randomization to end of hospitalization
Oxygen consumption
Total oxygen consumed during hospitalization
90-day hospital re-admission
Re-admission to the hospital after discharge and before 90 days
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Beth Israel Deaconess Medical Center
Lead sponsor
Wellcome Trust
Collaborator