Descriptive Analysis of Combat-Associated Aspiration Pneumonia.

Area of Science:

• Trauma Care
• Emergency Medicine
• Critical Care

Background:

• Airway obstruction is a leading cause of preventable battlefield death.
• Prehospital airway intervention, while life-saving, carries a risk of aspiration pneumonia.
• Understanding factors associated with aspiration pneumonia is crucial for improving patient outcomes.

Purpose of the Study:

• To identify variables associated with aspiration pneumonia following prehospital airway intervention in military casualties.
• To analyze the incidence and risk factors of aspiration pneumonia in this specific patient population.

Main Methods:

• Sub-analysis of data from the Department of Defense Trauma Registry (2007-2020).
• Inclusion of casualties with prehospital airway intervention and documented pneumonia within three days.
• Utilized a generalized linear model with Firth bias estimates for statistical analysis.

Main Results:

• 1,509 casualties underwent prehospital airway device placement; 41 (2.7%) developed aspiration pneumonia.
• No demographic differences between aspiration and non-aspiration groups.
• Succinylcholine administration was higher in the non-aspiration group (28.0% vs 12.2%) and significantly associated with lower odds of aspiration pneumonia (OR 0.56).
• Non-aspiration cohort had fewer ventilator, ICU, and hospital days, but lower survival rates.

Conclusions:

• The incidence of aspiration pneumonia after prehospital airway intervention in this cohort was low.
• Succinylcholine administration emerged as a significant factor associated with a decreased probability of developing aspiration pneumonia.