Prophylactic positive end-expiratory pressure and postintubation hemodynamics: an interventional, randomized study

Area of Science:

• Critical Care Medicine
• Respiratory Physiology
• Emergency Medicine

Background:

• Mechanical ventilation is crucial for critically ill patients requiring intubation.
• Positive end-expiratory pressure (PEEP) is commonly used during mechanical ventilation.
• The optimal PEEP strategy in the immediate post-intubation period remains debated.

Purpose of the Study:

• To compare the hemodynamic and clinical outcomes of prophylactic PEEP versus zero end-expiratory pressure (ZEEP) in the post-intubation period.
• To assess the impact of PEEP on mean arterial pressure (MAP) and other critical care outcomes.
• To evaluate the safety and efficacy of early PEEP application in emergency settings.

Main Methods:

• A prospective, single-center, randomized, single-blinded trial was conducted in a medical intensive care unit.
• Patients requiring urgent intubation were randomized to receive either 5 cmH2O PEEP or ZEEP post-intubation.
• Primary endpoint was the variation in MAP from baseline up to 90 minutes; secondary endpoints included intubation duration and 28-day mortality.

Main Results:

• No significant difference in mean arterial pressure (MAP) variation was observed between the PEEP and ZEEP groups.
• The mean duration of intubation and the need for MAP support were comparable between the groups.
• Twenty-eight-day mortality rates were similar, with no statistically significant difference between the PEEP and ZEEP groups.

Conclusions:

• Implementing prophylactic PEEP of 5 cmH2O in the immediate post-intubation period did not adversely affect short-term hemodynamics.
• This strategy did not negatively impact key clinical outcomes such as intubation duration or 28-day mortality.
• Prophylactic PEEP appears to be a safe option in critically ill patients during the post-intubation period in the emergency setting.