Lit Matters #3: Routine Fluid Bolus During Intubation Doesn’t Prevent Hypotension.

Peri-intubation hypotension is common in critically ill adults, and a routine pre-intubation fluid bolus did not reduce cardiovascular collapse in a multicenter ICU randomized trial. For ED and ICU airway management, this sharpens the question of who actually benefits from fluids before induction.

Peri-intubation Fluid Bolus Evidence

• Cardiovascular collapse outcome: The composite endpoint was clinically hard-edged: new or increased vasopressor use, severe hypotension, cardiac arrest, or death around intubation, making the negative result hard to dismiss.
• Routine 500 mL bolus: A 500 mL IV fluid bolus before or during intubation did not significantly lower cardiovascular collapse compared with no bolus, despite longstanding guideline support for the practice.
• Positive pressure rationale: The physiologic argument was reduced venous return after induction and positive-pressure ventilation, but even in patients expected to benefit most, no subgroup signal emerged.
• Pragmatic airway trial design: Clinicians were otherwise free to run the intubation, including induction drugs and rescue hemodynamics, so the trial reads like real-world ICU airway practice. We get into what that means at the bedside in the episode.
• What the negative trial means: This study argues against reflexive fluids as a universal peri-intubation hypotension prevention strategy, while leaving room for selective bolus use when the clinical picture clearly suggests preload responsiveness.