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Risk factors for developing pneumonia within 48 hours of intubation
1Pulmonary and Critical Care Departments, Hospital de Sabadell, and CEPSS/FPT, Sabadell, Barcelona, Spain. JRELLO@CSPT.es
Abstract:
Two hundred fifty intubated patients were followed during the first 48 h after intubation in order to identify potential risk factors for developing pneumonia within this period. Thirty-two developed pneumonia during this time. Univariate analysis established that large volume aspiration, presence of sedation, intubation caused by respiratory/cardiac arrest or decrease in the level of consciousness, emergency procedure, cardiopulmonary resuscitation (CPR), and Glasgow coma score < 9 were significantly associated with pneumonia. In contrast, prior infection and prior antimicrobial use were associated with a protective effect. Presence of subglottic secretion drainage and 15 other variables had no significant effect. Multivariate analysis selected CPR (odds ratio [OR] = 5.13, 95% confidence intervals [CI] = 2.14, 12.26) and continuous sedation (OR = 4.40, 95% CI = 1.83, 10.59) as significant risk factors for pneumonia, while antibiotic use (OR = 0.29, 95% CI = 0.12, 0.69) showed a protective effect. Our findings emphasize that risk factors for pneumonia change during the intubation period, and preventing pneumonia requires a combined approach.
Insights
Continuous sedation and cardiopulmonary resuscitation (CPR) are key risk factors for developing pneumonia in intubated patients within 48 hours. Prior antibiotic use, however, showed a protective effect against hospital-acquired pneumonia.
Area of Science:
- Critical Care Medicine
- Infectious Disease Epidemiology
- Hospital-Acquired Infections
Background:
- Pneumonia is a common complication in intubated patients.
- Identifying early risk factors for pneumonia is crucial for timely intervention.
- The dynamic nature of risk factors during the initial intubation period requires investigation.
Purpose of the Study:
- To identify significant risk factors for pneumonia development within 48 hours of intubation.
- To differentiate between early and late risk factors for ventilator-associated pneumonia (VAP).
- To evaluate the protective effect of prior antimicrobial use on VAP.
Main Methods:
- Prospective cohort study of 250 intubated patients.
- Data collection on patient characteristics, intubation indications, and interventions.
- Univariate and multivariate logistic regression analyses to identify risk factors.
Main Results:
- Thirty-two patients developed pneumonia within 48 hours.
- Significant univariate risk factors included large volume aspiration, sedation, emergency intubation, CPR, and low Glasgow Coma Score (<9).
- Multivariate analysis identified continuous sedation (OR=4.40) and CPR (OR=5.13) as independent risk factors, while prior antibiotic use (OR=0.29) was protective.
Conclusions:
- Risk factors for pneumonia in intubated patients evolve within the first 48 hours.
- Continuous sedation and CPR are critical risk factors necessitating targeted preventive strategies.
- Prior antibiotic administration may confer a protective effect against early-onset pneumonia in this population.
- A multifaceted approach is essential for effective pneumonia prevention in intubated patients.