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Updated: Jun 7, 2026
Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia
Published on: June 28, 2018
The diagnostic dilemma of ventilator-associated pneumonia in critically ill children
Vani Venkatachalam1, J Owen Hendley, Douglas F Willson
1Division of Pediatric Critical Care, University of Virginia Children's Hospital, Charlottesville, VA, USA.
Insights
Diagnosing ventilator-associated pneumonia in children is challenging due to unreliable methods. Improved diagnostic approaches are crucial for better treatment and outcomes in pediatric intensive care units.
Area of Science:
- Pediatric critical care medicine
- Infectious disease epidemiology
- Nosocomial infections
Background:
- Ventilator-associated pneumonia (VAP) is a common hospital-acquired infection in pediatric intensive care units (PICUs).
- VAP is the leading cause of antibiotic prescriptions in PICUs, contributing to significant morbidity and healthcare costs.
- Current diagnostic methods for VAP, including clinical, radiologic, and microbiologic criteria, lack sufficient sensitivity and specificity.
Purpose of the Study:
- To review the existing literature on ventilator-associated pneumonia in children.
- To emphasize the diagnostic challenges associated with VAP in pediatric populations.
- To highlight the need for improved diagnostic strategies.
Main Methods:
- A systematic literature review was conducted from 1947 to 2010.
- Databases searched included Ovid MEDLINE, PubMed, Cochrane Central Register of Controlled Trials, and ISI Web of Science.
- 262 pediatric articles and 61 adult articles were reviewed, with data from 48 pediatric studies selected.
Main Results:
- Diagnostic criteria for VAP (clinical, radiologic, microbiologic) show poor correlation with autopsy findings.
- Qualitative tracheal aspirate cultures lack specificity; quantitative cultures and bronchoalveolar lavage offer comparable sensitivity and specificity.
- Bronchoalveolar lavage demonstrated better concordance with autopsy lung cultures than quantitative tracheal aspirate cultures.
- Staphylococcus aureus and Pseudomonas species are common pathogens, but microbial flora vary with time and antibiotic use.
Conclusions:
- Inadequacies in current diagnostic methods significantly hinder conclusions on VAP epidemiology, treatment, and outcomes in PICUs.
- A more rigorous diagnostic approach, such as the Centers for Disease Control and Prevention algorithm, is recommended.
- Further systematic studies are essential to address the diagnostic limitations and improve VAP management in critically ill children.
Objective:
A review of the existing literature on ventilator-associated pneumonia in children with emphasis on problems in diagnosis.
Data Sources:
A systematic literature review from 1947 to 2010 using Ovid MEDLINE, PubMed, Cochrane Central Register of Controlled Trials, and ISI Web of Science using key words "ventilator associated pneumonia" and "children." Where pediatric data were lacking, appropriate adult studies were reviewed and similarly referenced.
Study Selection:
Two hundred sixty-two pediatric articles were reviewed and data from 48 studies selected. Data from 61 adult articles were also included in this review.
Data Extraction And Synthesis:
Ventilator-associated pneumonia is the second most common nosocomial infection and the most common reason for antibiotic use in the pediatric intensive care unit. Attributable mortality is uncertain but ventilator-associated pneumonia is associated with significant morbidity and cost. Diagnosis is problematic in that clinical, radiologic, and microbiologic criteria lack sensitivity and specificity relative to autopsy histopathology and culture. Qualitative tracheal aspirate cultures are commonly used in diagnosis but lack specificity. Quantitative tracheal aspirate cultures have sensitivity (31-69%) and specificity (55-100%) comparable to bronchoalveolar lavage (11-90% and 43-100%, respectively) but concordance for the same bacterial species when compared with autopsy lung culture was better for bronchoalveolar lavage (52-90% vs. 50-76% for quantitative tracheal aspirate). Staphylococcus aureus and Pseudomonas species are the most common organisms, but microbiologic flora change over time and with antibiotic use. Initial antibiotics should offer broad-spectrum coverage but should be narrowed as clinical response and cultures dictate.
Conclusions:
Ventilator-associated pneumonia is an important nosocomial infection in the pediatric intensive care unit. Conclusions regarding epidemiology, treatment, and outcomes are greatly hampered by the inadequacies of current diagnostic methods. We recommend a more rigorous approach to diagnosis by using the Centers for Disease Control and Prevention algorithm. Given that ventilator-associated pneumonia is the most common reason for antibiotic use in the pediatric intensive care unit, more systematic studies are sorely needed.
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