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Continuous enteral feeding: a major cause of pneumonia among ventilated intensive care unit patients
Insights
Continuous enteral feeding in intensive care units (ICUs) is linked to pneumonia in ventilated patients. High gastric pH significantly increases pneumonia risk and mortality in these critically ill patients.
Area of Science:
- Critical Care Medicine
- Infectious Disease
- Gastroenterology
Background:
- Continuous enteral feeding is a common ICU practice for nutritional support in ventilated patients.
- Pneumonia is a significant complication in critically ill patients, increasing morbidity and mortality.
Observation:
- A study observed pneumonia in 54% of ventilated patients receiving continuous enteral feeding for over 3 days.
- This complication was strongly associated with persistently high morning gastric pH levels.
Findings:
- 92% of patients with high gastric pH developed pneumonia, with causative organisms identified in the stomach, oropharynx, and trachea prior to pneumonia.
- This gastric pH-related pneumonia risk was independent of antacid or H2-receptor antagonist use.
- Patients experiencing this complication had a 1.6 times higher mortality rate than predicted by the Apache II score.
Implications:
- Findings suggest a need to monitor gastric pH in ventilated patients on continuous enteral feeding.
- Strategies to manage gastric pH may be crucial in preventing ventilator-associated pneumonia (VAP).
- This highlights a potential modifiable risk factor for VAP and associated mortality in ICUs.
Abstract:
Continuous enteral feeding is widely practiced in intensive care units (ICU). We found that pneumonia developed in 54% of 24 ventilated patients on continuous enteral feeding for more than 3 days. This appeared to affect only patients with a persistently high morning (7:00 am) gastric pH, with 12 of 13 (92%) patients developing pneumonia. In 11 patients the causative organisms were cultured initially from the stomach, oropharynx and trachea before pneumonia supervened. This effect was distinct from that found with the prophylactic use of antacids or H2-receptor antagonists. The mortality (46%) of this group of patients was 1.6 times greater than the expected mortality predicted by the Apache II Severity of Disease Classification System.