Personalized automatic management of tracheal cuff pressure and subglottic secretions drainage to prevent pneumonia in critically ill intubated patients. The MICROINHALO multicenter randomized controlled trial.

Summary

In a multicenter cluster RCT, automated, personalized endotracheal cuff-pressure control with active subglottic secretion drainage did not reduce day-3 tracheal colonization versus manual care but significantly reduced both clinically diagnosed and microbiologically confirmed VAP. The intervention also maintained cuff pressures within the safety range more consistently and increased subglottic drainage volumes.

Key Findings

• Primary endpoint (day-3 tracheal colonization) showed no difference: 37% vs 41.5% (P=0.52).
• Clinically diagnosed VAP was significantly lower with automation: 12.6% vs 24.4% (P=0.016).
• Microbiologically confirmed VAP was also reduced: 10.2% vs 19.5% (P=0.039).
• Fewer cuff-pressure readings outside safety range and greater daily subglottic drainage with automation.

Clinical Implications

Consider adopting automated cuff-pressure control with active subglottic drainage where available to reduce VAP, while recognizing the lack of effect on early colonization and the need for confirmatory trials to inform guidelines.

Limitations

• Open-label design and negative primary endpoint raise risk of type I error in secondary outcomes.
• Generalizability may depend on specific devices and ICU workflows.

Future Directions

A confirmatory, adequately powered trial with VAP as the primary endpoint and cost-effectiveness analyses is warranted; mechanistic substudies could clarify whether improved cuff-pressure stability mediates VAP reduction.