Implementation of Lung-Protective Ventilation in Patients With Acute Respiratory Failure.

Area of Science:

• Critical Care Medicine
• Respiratory Therapy
• Health Informatics

Background:

• Mechanical ventilation is crucial for patients with respiratory failure, but suboptimal settings can lead to adverse outcomes.
• Low tidal volume ventilation (LTVV) is recommended to mitigate ventilator-induced lung injury, especially in acute respiratory distress syndrome (ARDS).
• Implementing standardized protocols can improve the consistency of care in intensive care units (ICUs).

Purpose of the Study:

• To assess the effectiveness of a computerized protocol for implementing low tidal volume ventilation (LTVV) in mechanically ventilated patients.
• To evaluate the impact of the protocol on ventilator management practices and clinical outcomes, including in patients with ARDS.
• To determine if the protocol improved adherence to LTVV and reduced the use of high tidal volumes.

Main Methods:

• A pragmatic, nonrandomized stepped wedge type II hybrid implementation/effectiveness trial was conducted across twelve hospitals over two years.
• The study included 8,692 adult patients requiring mechanical ventilation, with a subgroup analysis for 3,282 patients diagnosed with ARDS.
• The intervention involved the implementation of a computerized protocol for LTVV in the ICU.

Main Results:

• Following protocol implementation, the median initial set tidal volume decreased significantly (6.1 to 6.0 mL/kg predicted body weight; p=0.009).
• The percentage of patients receiving LTVV (≤ 6.5 mL/kg) increased (69.8% to 72.5%; p=0.036), and the use of high tidal volumes (> 8 mL/kg) decreased (9.0% to 6.7%; p=0.005).
• Among ARDS patients, day 1 positive end-expiratory pressure increased (6.7 to 8.0 cm H2O; p<0.001), but no significant improvements were observed in ventilator-free days, length of stay, or mortality.

Conclusions:

• The computerized protocol successfully improved adherence to optimal ventilator management, specifically increasing LTVV use and reducing high tidal volume delivery.
• Despite improved process measures, the implementation of the LTVV protocol did not lead to significant improvements in key clinical outcomes for mechanically ventilated patients.
• Further research may be needed to optimize ventilator strategies and protocols to achieve better clinical results in critically ill patients.