Conservative versus Liberal Oxygenation Targets for Mechanically Ventilated Patients. A Pilot Multicenter Randomized...

Area of Science:

• Critical Care Medicine
• Respiratory Physiology

Background:

• No randomized controlled trials (RCTs) exist comparing oxygenation targets in ICU patients.
• Optimal oxygen saturation (SpO2) targets for invasively mechanically ventilated (IMV) patients remain unclear.

Purpose of the Study:

• To assess the feasibility of a conservative oxygenation strategy versus a liberal strategy in ICU patients requiring IMV.
• To compare outcomes between conservative and liberal oxygenation targets.

Main Methods:

• RCT involving 103 adult ICU patients requiring IMV for >= 24 hours.
• Random allocation to conservative (SpO2 88-92%) or liberal (SpO2 >= 96%) oxygenation.
• Primary outcome was feasibility; secondary outcomes included organ dysfunction and mortality.

Main Results:

• Significant differences in SpO2, SaO2, PaO2, and FiO2 between groups (P < 0.0001).
• No significant differences in new organ dysfunction or ICU/90-day mortality.
• Conservative group had more time with SpO2 < 88% (1% vs 0.3%) and less time with SpO2 > 98% (4% vs 22%).

Conclusions:

• A conservative oxygenation strategy is feasible in IMV patients.
• Larger RCTs are warranted to confirm these findings.
• The study supports further investigation into conservative oxygenation targets.