For people ages 2 months and up
Population a: Bronchiolitis patients directly observed while not receiving supplemental oxygen ("in room air," for primary trial outcome)
Inclusion Criteria:
- Infants and children 2 months through 23 months old
- Hospitalized on non-ICU wards participating in the trial
- Cared for by generalist inpatient services (e.g. general pediatrics, hospital medicine)
- Primary diagnosis of bronchiolitis in most recent physician progress note
- Not actively receiving supplemental oxygen ("in room air")
- Last documented receipt of supplemental oxygen >1 hour prior to direct observational data collection
Exclusion Criteria:
Population b: Bronchiolitis patients directly observed while receiving supplemental oxygen (for underuse evaluation).
Inclusion Criteria:
- Infants and children 2 months through 23 months old
- Hospitalized on non-ICU wards participating in the trial
- Cared for by generalist inpatient services (e.g. general pediatrics, hospital medicine)
- Primary diagnosis of bronchiolitis in most recent physician progress note
- Actively receiving ≥2 Liters/minute (2L/min) supplemental oxygen or 21% room air flow
Exclusion Criteria:
- Extreme prematurity (<28 weeks completed gestation)
- Cardiac disease
- Pulmonary hypertension
- Chronic lung disease
- Home oxygen requirement
- Neuromuscular disease
- Immunodeficiency
- Cancer
- Severe Acute Respiratory Syndrome Coronavirus 2 [Covid-19 / SARS-CoV-2 (known or suspected)]
