[The "preoxygenation" special function in mechanical ventilators. Medically necessary and an ergonomic plus?]

Area of Science:

• Critical Care Medicine
• Respiratory Therapy
• Biomedical Engineering

Background:

• Tracheobronchial suctioning can lead to hypoxia and frequent ventilator alarms.
• Existing methods lack integrated solutions for managing these risks.

Purpose of the Study:

• To evaluate the medical and ergonomic benefits of an integrated ventilator function for preoxygenation and alarm muting during tracheobronchial suctioning.
• To assess the impact of this integrated function on patient safety and nursing workflow.

Main Methods:

• A study involving 30 tracheobronchial suctioning procedures with and without preoxygenation on intensive care unit patients.
• Monitoring of arterial blood gases and oxygen saturation (SaO2) at multiple time points.
• Recording of nurse repositioning, acoustic alarms, and procedure duration; nurses provided feedback via scores and statements.

Main Results:

• Preoxygenation ensured 100% arterial oxygen saturation, providing a critical safety margin, especially for high-risk patients.
• While the integrated function reduced alarms, it did not completely eliminate them, with coughing sometimes triggering high airway pressure alarms.
• The integrated ventilator feature received an average usefulness score of 2.8 from 28 participating nurses, indicating general approval.

Conclusions:

• Integrated preoxygenation and alarm management during tracheobronchial suctioning significantly enhances patient safety.
• The evaluated ventilator function offers a valuable improvement for clinical practice, though further refinement may be needed to fully address alarm issues.