Severe ARDS: Generating Evidence

Approximately one-quarter of ARDS patients develop severe hypoxemia, which has been
associated with mortality rates approximating 40-50%. The majority have been described to
present with severe disease at baseline, suggesting an opportunity for early intervention. In
addition, use of evidence-based practices in severe ARDS is highly variable and inconsistent;
use of unproven treatment modalities is also frequently seen. Given the variability in
treatment practices in severe ARDS, an understanding of the patient-level and
institutional-level factors contributing to differences in therapeutic approach is needed in
order to improve the quality and consistency of care given to these high-risk patients. SAGE
is a multicenter, observational cohort study examining the patient-level and institutional
characteristics associated with variability in management of patients with moderate to severe
ARDS, factors associated with survival or need for adjuvant therapy, and variability in
ventilator management of patients on extracorporeal membrane oxygenation. Findings from this
observational study can subsequently be used to inform future interventional trial
development.

Inclusion Criteria:

1. Age > 18 years

2. Patients with acute respiratory failure requiring invasive mechanical ventilation via
an endotracheal tube or tracheostomy with current or planned admission to the ICU

3. Moderate-severe ARDS as defined by fulfillment of all of the following within 48
hours:

1. Bilateral opacities detected on chest radiograph or CT, not fully explained by
effusions, lung collapse, or nodules

2. Respiratory failure not fully explained by cardiac failure or fluid overload

3. PaO2/FiO2 ratio < 150 with a minimum of 5 cmH20 PEEP

Exclusion Criteria:

There are no exclusion criteria.