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A time-dependent analysis of intensive care unit pneumonia in trauma patients
Grant V Bochicchio1, Manjari Joshi, Kelly Bochicchio
1R Adams Cowley Shock Trauma Center and University of Maryland School of Medicine, Baltimore, Maryland 21201, USA. gbochicchio@umm.edu
Insights
Timely antibiotics are crucial for trauma patients with pneumonia. Unanticipated pathogens require awareness of specific risk factors for effective treatment.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Trauma Surgery
Background:
- Pneumonia in trauma patients necessitates prompt antibiotic selection.
- Evaluating pneumonia incidence and microbiology is vital for patient outcomes.
Purpose of the Study:
- To assess pneumonia incidence and microbiology in trauma patients.
- To stratify pneumonia by days post-admission and identify risk factors.
Main Methods:
- Prospective data collection from 714 trauma ICU patients over one year.
- Pneumonia classification: community-acquired (CAP), early nosocomial (ENP), late nosocomial (LNP).
- Diagnosis followed strict institutional guidelines.
Main Results:
- 182 patients (25%) developed 204 pneumonias; 61% were ventilator-associated.
- Staphylococcus aureus and Haemophilus influenzae were common pathogens.
- Risk factors like cancer, liver failure, and age predicted nontypical pathogens; obesity predicted longer ICU stays.
Conclusions:
- Unanticipated pathogens were identified across all pneumonia classifications.
- Clinicians must recognize risk factors for pathogens not covered by standard antibiotics.
- Tailored antibiotic strategies are essential for optimal trauma patient care.
Background:
Appropriate and timely antibiotic therapy to treat pneumonia in trauma patients is extremely important. We evaluated the incidence and microbiology of pneumonia stratified by days postadmission and risk factors.
Methods:
Prospective data were collected on 714 trauma patients admitted to the intensive care unit over a 1-year period. Pneumonia was classified as community acquired (CAP) (< or = 3 days), early nosocomial (ENP) (4-6 days), or late nosocomial (LNP) (> or = 7 days). In addition, pneumonia was classified as CAP only, nosocomial only (NI), or combination (CAP and NI, or ENP and LNP) pneumonia. Strict institutional guidelines were followed for diagnosis.
Results:
One hundred eighty-two patients (25%) were diagnosed with 204 pneumonias over the study period. One hundred twenty-five (61%) of these pneumonias were ventilator associated. Staphylococcus aureus and Haemophilus influenzae were the most common pathogens isolated. Twenty-one percent of patients with CAP acquired an LNP (p < 0.025), in which Pseudomonas was the most common organism. Haemophilus caused LNP in 12% of patients. Cancer (p < 0.01), liver failure (p < 0.05), and age (p < 0.01) were predictive of nontypical pathogens in patients with CAP and ENP (p < 0.05). Obesity was most predictive of increased ventilator days (p < 0.001) and intensive care unit length of stay (p < 0.001). Increased age, alcohol abuse, and field airway were most predictive of mortality.
Conclusion:
Unanticipated pathogens were isolated in each class of pneumonia. The clinician must be aware of significant risk factors that may predispose patients to pathogens that are not ordinarily covered with standard antibiotic therapy.
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