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Early ICU energy deficit is a risk factor for Staphylococcus aureus ventilator-associated pneumonia

Christophe Faisy1, Maria Candela Llerena2, Magali Savalle1

  • 1Medical Intensive Care Unit, European Georges Pompidou Hospital, University Paris-Descartes, Assistance Publique-Hôpitaux de Paris, Paris, France.

Chest
|September 10, 2011
PubMed

Insights

Early caloric insufficiency in the intensive care unit (ICU) increases the risk of developing ventilator-associated pneumonia (VAP). Specifically, a greater energy deficit is linked to a higher likelihood of Staphylococcus aureus VAP in mechanically ventilated patients.

Area of Science:

  • Critical Care Medicine
  • Infectious Diseases
  • Nutritional Science

Background:

  • Caloric insufficiency in the ICU is linked to increased infection rates.
  • The relationship between nutritional status and specific ICU pathogens remains unclear.
  • Early energy balance in critically ill patients may influence the development of ventilator-associated pneumonia (VAP).

Purpose of the Study:

  • To investigate the impact of early in-ICU energy balance on the pathogens causing VAP.
  • To determine if energy deficit influences the likelihood of specific pathogen acquisition in VAP.

Main Methods:

  • Prospective, observational cohort study in a teaching hospital ICU.
  • Compared energy balance (delivered vs. expenditure) in 76 mechanically ventilated patients with VAP.
  • Analyzed fiber-optic bronchoalveolar lavage (BAL) cultures for pathogen identification.

Main Results:

  • Staphylococcus aureus was identified in 22 VAP cases.
  • Patients with S. aureus VAP had significantly greater cumulative energy deficits (-10,275 kcal) compared to other pathogens (-7,376 kcal).
  • Energy deficit was independently associated with S. aureus VAP, with more severe deficits correlating with higher S. aureus BAL positivity.

Conclusions:

  • Early caloric deficit in the ICU is an independent risk factor for developing S. aureus VAP.
  • This finding is significant for patients requiring prolonged mechanical ventilation.
  • Optimizing early nutritional support may be crucial in preventing S. aureus VAP.
Abstract

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