EVERDAC Trial

Population

Critically ill adult patients with shock, admitted to the ICU within the previous 24 hours.

• Total enrolled: 1010 patients

• Median age and comorbidity data not specified in the summary, but all patients required vasopressor or inotropic support consistent with shock diagnosis.

Intervention

Noninvasive blood pressure (NIBP) monitoring strategy, using an automated brachial cuff, with no arterial catheter placement within 4 hours of randomization.

• Arterial catheterization was permitted later if prespecified safety criteria were met (e.g., unstable BP, need for frequent ABGs, etc.).

Comparison

Invasive blood pressure monitoring strategy with early arterial catheter placement (within 4 hours of randomization), per current standard ICU care for shock.

Outcome

• Primary Outcome: All-cause mortality at day 28
  NIBP group: 34.3%
  Invasive group: 36.9%
  Adjusted risk difference: −3.2 percentage points
  95% CI: −8.9 to 2.5
  P = 0.006 for noninferiority
  Noninferiority margin: 5%

• Device-related adverse events:
  Pain/discomfort (≥1 day):
  NIBP: 13.1%
  Invasive: 9.0%
  Hematoma/hemorrhage:
  NIBP: 1.0%
  Invasive: 8.2%

🩺 Clinical Insights for Intensivists

• Noninferiority confirmed: Managing ICU patients with shock using noninvasive BP monitoring initially is noninferior to early arterial catheter placement regarding 28-day mortality.

• Device-related harm: Arterial catheter use was associated with a significantly higher rate of hematoma/bleeding (8.2%), emphasizing the procedural risk associated with early insertion.

• Pain and discomfort were slightly higher in the NIBP group, possibly due to repeated cuff inflation or prolonged use, but the clinical impact is likely minor.

• Clinical flexibility: The study allows for arterial catheter use later in NIBP-assigned patients when clinically justified, aligning with real-world escalation practice.

🔍 Implication for ICU Practice

This study supports deferring routine early arterial catheterization in select ICU patients with shock, provided noninvasive BP monitoring is adequate, and close monitoring allows for timely escalation. It encourages a more individualized, risk-benefit-based approach to invasive monitoring, especially in settings where procedural complications or resource constraints are concerns.

Key take-home: For many ICU patients with shock, early arterial lines may not be essential—monitor closely and insert only if needed.