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Endotracheal aminoglycosides in gram negative pneumonia. A preliminary report
Abstract:
Five postoperative patients with respiratory failure and gram negative pneumonia unresponsive to systemic antimicrobials were treated with endotracheally instilled aminoglycosides. Sputum cultures in four patients grew Pseudomonas aeruginosa and, in the fifth, Enterobacter cloacae. The five patients had been treated systemically for an average of 13 days (range 9 to 19 days) without improvement prior to endotracheal antibiotic administration. The gram negative organisms disappeared from the sputum cultures in all patients within an average of 4 days (range 2 to 8 days) following initiation of endotracheal antibiotics. All five patients had continued clinical improvement manifest by improved chest radiographs, improved oxygenation, and absence of the offending organisms from sputum cultures. None of the patients died from their gram negative pneumonia. This success coupled with data from other investigators suggests that endotracheal antibiotics should be considered in life-threatening gram negative pneumonias that are unresponsive to conventional systemic antimicrobials.
Insights
For patients with severe gram-negative pneumonia unresponsive to standard treatment, direct endotracheal instillation of aminoglycoside antibiotics proved effective. This approach rapidly cleared bacteria and improved patient outcomes, offering a promising alternative therapy.
Area of Science:
- Critical Care Medicine
- Infectious Diseases
- Pulmonology
Background:
- Gram-negative pneumonia poses a significant threat to postoperative patients with respiratory failure.
- Systemic antimicrobial therapy is the conventional treatment, but resistance and lack of efficacy are common challenges.
Observation:
- Five patients with severe gram-negative pneumonia (Pseudomonas aeruginosa, Enterobacter cloacae) showed no improvement with systemic antibiotics after an average of 13 days.
- These patients received endotracheally instilled aminoglycosides.
Findings:
- Endotracheal aminoglycosides eradicated gram-negative organisms from sputum cultures within an average of 4 days.
- Patients demonstrated clinical improvement, including better chest X-rays and oxygenation.
- No mortality was observed in the treated patients due to gram-negative pneumonia.
Implications:
- Direct endotracheal antibiotic instillation is a viable and effective treatment for life-threatening gram-negative pneumonias.
- This method offers a potential alternative for patients unresponsive to conventional systemic antimicrobials.
- Further research into endotracheal antibiotic delivery is warranted for severe respiratory infections.