An evidence-based recommendation on bed head elevation for mechanically ventilated patients.

Area of Science:

• Critical Care Medicine
• Pulmonary Medicine
• Infectious Disease Prevention

Background:

• Semi-upright positioning is a recommended practice for ventilated patients to prevent ventilator-associated pneumonia (VAP).
• Current recommendations for semi-upright positioning lack a strong evidence base.
• The Institute for Health Care Improvement includes semi-upright position in its Ventilator Bundle.

Purpose of the Study:

• To systematically review the evidence on the benefits and harms of semi-upright positioning in ventilated patients.
• To develop an expert recommendation for semi-upright positioning based on scientific evidence and clinical considerations.

Main Methods:

• A systematic review adhering to PRISMA guidelines was conducted.
• A European expert panel utilized a three-round electronic Delphi procedure to formulate recommendations.
• The review analyzed data from three trials involving 337 patients.

Main Results:

• Evidence regarding the effectiveness or harm of 45° head elevation on VAP, decubitus, and mortality remains uncertain.
• The impact of 45° elevation on thromboembolism and hemodynamic instability is unknown.
• Experts recommended a 20-45° head elevation, preferably ≥30°, considering patient safety and other care needs.

Conclusions:

• Despite the lack of proven clinical benefits, experts favor semi-upright positioning for ventilated patients.
• The optimal patient position is multifactorial and depends on various determinants.
• Given scientific uncertainty, semi-upright positioning is recommended with necessary restrictions and precautions.