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Published on: February 23, 2014
Nosocomial infections in a respiratory intensive care unit
Abstract:
A total of 250 consecutive admissions to an open-plan respiratory ICU were analyzed prospectively to identify the incidence of secondary hospital-acquired infections and possible predisposing factors. Despite preventative measures and a restricted antibiotic policy, 23.6% of patients developed secondary infections. Patients admitted after multiple trauma were the only diagnostic category of patients who showed a significantly increased incidence of secondary infections. The length of hospitalization and number of patients who had intubations or tracheostomies was higher in the group with secondary infection; the causal relationship was difficult to establish. Patients who were not intubated or tracheostomized did not develop secondary infection. Prior administration of antibiotics did not appear to influence the incidence of secondary infection. There was a significant increase in secondary infections in patients with a higher therapeutic intervention scoring system score. The predominant pathogens cultured were highly resistant Gram-negative organisms, particularly Acinetobacter sp. and Pseudomonas sp. Staphylococcus aureus was the most common Gram-positive pathogen. The ICU course was probably prolonged by the complication of nosocomial infection, which may have contributed to the deaths.
Insights
Secondary hospital-acquired infections occurred in 23.6% of respiratory ICU patients despite preventative measures. Multiple trauma patients faced a higher infection risk, with invasive procedures and high intervention scores being significant factors.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Hospital Epidemiology
Background:
- Hospital-acquired infections (HAIs) are a significant concern in intensive care units (ICUs).
- Identifying predisposing factors for secondary infections is crucial for improving patient outcomes in respiratory ICUs.
Purpose of the Study:
- To determine the incidence of secondary hospital-acquired infections in a respiratory ICU.
- To identify predisposing factors associated with the development of these infections.
Main Methods:
- Prospective analysis of 250 consecutive admissions to an open-plan respiratory ICU.
- Data collection included patient demographics, diagnoses, interventions, and infection development.
- Therapeutic Intervention Scoring System (TISS) scores were utilized.
Main Results:
- 23.6% of patients developed secondary infections despite preventative measures and a restricted antibiotic policy.
- Multiple trauma patients exhibited a significantly higher incidence of secondary infections.
- Higher TISS scores correlated with increased secondary infections; intubation/tracheostomy was more frequent in infected patients, though causality was unclear.
- Highly resistant Gram-negative organisms (Acinetobacter sp., Pseudomonas sp.) and Staphylococcus aureus were predominant pathogens.
Conclusions:
- Secondary HAIs are common in respiratory ICUs, even with infection control measures.
- Multiple trauma, invasive procedures, and higher illness severity (indicated by TISS scores) are associated with increased HAI risk.
- Nosocomial infections likely prolong ICU stays and may contribute to mortality, underscoring the need for targeted prevention strategies.
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